jshint-rhino.js 1.1 MB

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  1. #!/usr/bin/env rhino
  2. var window = {};
  3. /*! 2.9.7 */
  4. var JSHINT;
  5. if (typeof window === 'undefined') window = {};
  6. (function () {
  7. var require;
  8. require=(function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(require,module,exports){
  9. var identifierStartTable = [];
  10. for (var i = 0; i < 128; i++) {
  11. identifierStartTable[i] =
  12. i === 36 || // $
  13. i >= 65 && i <= 90 || // A-Z
  14. i === 95 || // _
  15. i >= 97 && i <= 122; // a-z
  16. }
  17. var identifierPartTable = [];
  18. for (var i = 0; i < 128; i++) {
  19. identifierPartTable[i] =
  20. identifierStartTable[i] || // $, _, A-Z, a-z
  21. i >= 48 && i <= 57; // 0-9
  22. }
  23. module.exports = {
  24. asciiIdentifierStartTable: identifierStartTable,
  25. asciiIdentifierPartTable: identifierPartTable
  26. };
  27. },{}],2:[function(require,module,exports){
  28. module.exports = 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  29. },{}],3:[function(require,module,exports){
  30. var str = 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  31. var arr = str.split(',').map(function(code) {
  32. return parseInt(code, 10);
  33. });
  34. module.exports = arr;
  35. },{}],4:[function(require,module,exports){
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  37. var arr = str.split(',').map(function(code) {
  38. return parseInt(code, 10);
  39. });
  40. module.exports = arr;
  41. },{}],5:[function(require,module,exports){
  42. // http://wiki.commonjs.org/wiki/Unit_Testing/1.0
  43. //
  44. // THIS IS NOT TESTED NOR LIKELY TO WORK OUTSIDE V8!
  45. //
  46. // Originally from narwhal.js (http://narwhaljs.org)
  47. // Copyright (c) 2009 Thomas Robinson <280north.com>
  48. //
  49. // Permission is hereby granted, free of charge, to any person obtaining a copy
  50. // of this software and associated documentation files (the 'Software'), to
  51. // deal in the Software without restriction, including without limitation the
  52. // rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
  53. // sell copies of the Software, and to permit persons to whom the Software is
  54. // furnished to do so, subject to the following conditions:
  55. //
  56. // The above copyright notice and this permission notice shall be included in
  57. // all copies or substantial portions of the Software.
  58. //
  59. // THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  60. // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  61. // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  62. // AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  63. // ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  64. // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  65. // when used in node, this will actually load the util module we depend on
  66. // versus loading the builtin util module as happens otherwise
  67. // this is a bug in node module loading as far as I am concerned
  68. var util = require('util/');
  69. var pSlice = Array.prototype.slice;
  70. var hasOwn = Object.prototype.hasOwnProperty;
  71. // 1. The assert module provides functions that throw
  72. // AssertionError's when particular conditions are not met. The
  73. // assert module must conform to the following interface.
  74. var assert = module.exports = ok;
  75. // 2. The AssertionError is defined in assert.
  76. // new assert.AssertionError({ message: message,
  77. // actual: actual,
  78. // expected: expected })
  79. assert.AssertionError = function AssertionError(options) {
  80. this.name = 'AssertionError';
  81. this.actual = options.actual;
  82. this.expected = options.expected;
  83. this.operator = options.operator;
  84. if (options.message) {
  85. this.message = options.message;
  86. this.generatedMessage = false;
  87. } else {
  88. this.message = getMessage(this);
  89. this.generatedMessage = true;
  90. }
  91. var stackStartFunction = options.stackStartFunction || fail;
  92. if (Error.captureStackTrace) {
  93. Error.captureStackTrace(this, stackStartFunction);
  94. }
  95. else {
  96. // non v8 browsers so we can have a stacktrace
  97. var err = new Error();
  98. if (err.stack) {
  99. var out = err.stack;
  100. // try to strip useless frames
  101. var fn_name = stackStartFunction.name;
  102. var idx = out.indexOf('\n' + fn_name);
  103. if (idx >= 0) {
  104. // once we have located the function frame
  105. // we need to strip out everything before it (and its line)
  106. var next_line = out.indexOf('\n', idx + 1);
  107. out = out.substring(next_line + 1);
  108. }
  109. this.stack = out;
  110. }
  111. }
  112. };
  113. // assert.AssertionError instanceof Error
  114. util.inherits(assert.AssertionError, Error);
  115. function replacer(key, value) {
  116. if (util.isUndefined(value)) {
  117. return '' + value;
  118. }
  119. if (util.isNumber(value) && !isFinite(value)) {
  120. return value.toString();
  121. }
  122. if (util.isFunction(value) || util.isRegExp(value)) {
  123. return value.toString();
  124. }
  125. return value;
  126. }
  127. function truncate(s, n) {
  128. if (util.isString(s)) {
  129. return s.length < n ? s : s.slice(0, n);
  130. } else {
  131. return s;
  132. }
  133. }
  134. function getMessage(self) {
  135. return truncate(JSON.stringify(self.actual, replacer), 128) + ' ' +
  136. self.operator + ' ' +
  137. truncate(JSON.stringify(self.expected, replacer), 128);
  138. }
  139. // At present only the three keys mentioned above are used and
  140. // understood by the spec. Implementations or sub modules can pass
  141. // other keys to the AssertionError's constructor - they will be
  142. // ignored.
  143. // 3. All of the following functions must throw an AssertionError
  144. // when a corresponding condition is not met, with a message that
  145. // may be undefined if not provided. All assertion methods provide
  146. // both the actual and expected values to the assertion error for
  147. // display purposes.
  148. function fail(actual, expected, message, operator, stackStartFunction) {
  149. throw new assert.AssertionError({
  150. message: message,
  151. actual: actual,
  152. expected: expected,
  153. operator: operator,
  154. stackStartFunction: stackStartFunction
  155. });
  156. }
  157. // EXTENSION! allows for well behaved errors defined elsewhere.
  158. assert.fail = fail;
  159. // 4. Pure assertion tests whether a value is truthy, as determined
  160. // by !!guard.
  161. // assert.ok(guard, message_opt);
  162. // This statement is equivalent to assert.equal(true, !!guard,
  163. // message_opt);. To test strictly for the value true, use
  164. // assert.strictEqual(true, guard, message_opt);.
  165. function ok(value, message) {
  166. if (!value) fail(value, true, message, '==', assert.ok);
  167. }
  168. assert.ok = ok;
  169. // 5. The equality assertion tests shallow, coercive equality with
  170. // ==.
  171. // assert.equal(actual, expected, message_opt);
  172. assert.equal = function equal(actual, expected, message) {
  173. if (actual != expected) fail(actual, expected, message, '==', assert.equal);
  174. };
  175. // 6. The non-equality assertion tests for whether two objects are not equal
  176. // with != assert.notEqual(actual, expected, message_opt);
  177. assert.notEqual = function notEqual(actual, expected, message) {
  178. if (actual == expected) {
  179. fail(actual, expected, message, '!=', assert.notEqual);
  180. }
  181. };
  182. // 7. The equivalence assertion tests a deep equality relation.
  183. // assert.deepEqual(actual, expected, message_opt);
  184. assert.deepEqual = function deepEqual(actual, expected, message) {
  185. if (!_deepEqual(actual, expected)) {
  186. fail(actual, expected, message, 'deepEqual', assert.deepEqual);
  187. }
  188. };
  189. function _deepEqual(actual, expected) {
  190. // 7.1. All identical values are equivalent, as determined by ===.
  191. if (actual === expected) {
  192. return true;
  193. } else if (util.isBuffer(actual) && util.isBuffer(expected)) {
  194. if (actual.length != expected.length) return false;
  195. for (var i = 0; i < actual.length; i++) {
  196. if (actual[i] !== expected[i]) return false;
  197. }
  198. return true;
  199. // 7.2. If the expected value is a Date object, the actual value is
  200. // equivalent if it is also a Date object that refers to the same time.
  201. } else if (util.isDate(actual) && util.isDate(expected)) {
  202. return actual.getTime() === expected.getTime();
  203. // 7.3 If the expected value is a RegExp object, the actual value is
  204. // equivalent if it is also a RegExp object with the same source and
  205. // properties (`global`, `multiline`, `lastIndex`, `ignoreCase`).
  206. } else if (util.isRegExp(actual) && util.isRegExp(expected)) {
  207. return actual.source === expected.source &&
  208. actual.global === expected.global &&
  209. actual.multiline === expected.multiline &&
  210. actual.lastIndex === expected.lastIndex &&
  211. actual.ignoreCase === expected.ignoreCase;
  212. // 7.4. Other pairs that do not both pass typeof value == 'object',
  213. // equivalence is determined by ==.
  214. } else if (!util.isObject(actual) && !util.isObject(expected)) {
  215. return actual == expected;
  216. // 7.5 For all other Object pairs, including Array objects, equivalence is
  217. // determined by having the same number of owned properties (as verified
  218. // with Object.prototype.hasOwnProperty.call), the same set of keys
  219. // (although not necessarily the same order), equivalent values for every
  220. // corresponding key, and an identical 'prototype' property. Note: this
  221. // accounts for both named and indexed properties on Arrays.
  222. } else {
  223. return objEquiv(actual, expected);
  224. }
  225. }
  226. function isArguments(object) {
  227. return Object.prototype.toString.call(object) == '[object Arguments]';
  228. }
  229. function objEquiv(a, b) {
  230. if (util.isNullOrUndefined(a) || util.isNullOrUndefined(b))
  231. return false;
  232. // an identical 'prototype' property.
  233. if (a.prototype !== b.prototype) return false;
  234. // if one is a primitive, the other must be same
  235. if (util.isPrimitive(a) || util.isPrimitive(b)) {
  236. return a === b;
  237. }
  238. var aIsArgs = isArguments(a),
  239. bIsArgs = isArguments(b);
  240. if ((aIsArgs && !bIsArgs) || (!aIsArgs && bIsArgs))
  241. return false;
  242. if (aIsArgs) {
  243. a = pSlice.call(a);
  244. b = pSlice.call(b);
  245. return _deepEqual(a, b);
  246. }
  247. var ka = objectKeys(a),
  248. kb = objectKeys(b),
  249. key, i;
  250. // having the same number of owned properties (keys incorporates
  251. // hasOwnProperty)
  252. if (ka.length != kb.length)
  253. return false;
  254. //the same set of keys (although not necessarily the same order),
  255. ka.sort();
  256. kb.sort();
  257. //~~~cheap key test
  258. for (i = ka.length - 1; i >= 0; i--) {
  259. if (ka[i] != kb[i])
  260. return false;
  261. }
  262. //equivalent values for every corresponding key, and
  263. //~~~possibly expensive deep test
  264. for (i = ka.length - 1; i >= 0; i--) {
  265. key = ka[i];
  266. if (!_deepEqual(a[key], b[key])) return false;
  267. }
  268. return true;
  269. }
  270. // 8. The non-equivalence assertion tests for any deep inequality.
  271. // assert.notDeepEqual(actual, expected, message_opt);
  272. assert.notDeepEqual = function notDeepEqual(actual, expected, message) {
  273. if (_deepEqual(actual, expected)) {
  274. fail(actual, expected, message, 'notDeepEqual', assert.notDeepEqual);
  275. }
  276. };
  277. // 9. The strict equality assertion tests strict equality, as determined by ===.
  278. // assert.strictEqual(actual, expected, message_opt);
  279. assert.strictEqual = function strictEqual(actual, expected, message) {
  280. if (actual !== expected) {
  281. fail(actual, expected, message, '===', assert.strictEqual);
  282. }
  283. };
  284. // 10. The strict non-equality assertion tests for strict inequality, as
  285. // determined by !==. assert.notStrictEqual(actual, expected, message_opt);
  286. assert.notStrictEqual = function notStrictEqual(actual, expected, message) {
  287. if (actual === expected) {
  288. fail(actual, expected, message, '!==', assert.notStrictEqual);
  289. }
  290. };
  291. function expectedException(actual, expected) {
  292. if (!actual || !expected) {
  293. return false;
  294. }
  295. if (Object.prototype.toString.call(expected) == '[object RegExp]') {
  296. return expected.test(actual);
  297. } else if (actual instanceof expected) {
  298. return true;
  299. } else if (expected.call({}, actual) === true) {
  300. return true;
  301. }
  302. return false;
  303. }
  304. function _throws(shouldThrow, block, expected, message) {
  305. var actual;
  306. if (util.isString(expected)) {
  307. message = expected;
  308. expected = null;
  309. }
  310. try {
  311. block();
  312. } catch (e) {
  313. actual = e;
  314. }
  315. message = (expected && expected.name ? ' (' + expected.name + ').' : '.') +
  316. (message ? ' ' + message : '.');
  317. if (shouldThrow && !actual) {
  318. fail(actual, expected, 'Missing expected exception' + message);
  319. }
  320. if (!shouldThrow && expectedException(actual, expected)) {
  321. fail(actual, expected, 'Got unwanted exception' + message);
  322. }
  323. if ((shouldThrow && actual && expected &&
  324. !expectedException(actual, expected)) || (!shouldThrow && actual)) {
  325. throw actual;
  326. }
  327. }
  328. // 11. Expected to throw an error:
  329. // assert.throws(block, Error_opt, message_opt);
  330. assert.throws = function(block, /*optional*/error, /*optional*/message) {
  331. _throws.apply(this, [true].concat(pSlice.call(arguments)));
  332. };
  333. // EXTENSION! This is annoying to write outside this module.
  334. assert.doesNotThrow = function(block, /*optional*/message) {
  335. _throws.apply(this, [false].concat(pSlice.call(arguments)));
  336. };
  337. assert.ifError = function(err) { if (err) {throw err;}};
  338. var objectKeys = Object.keys || function (obj) {
  339. var keys = [];
  340. for (var key in obj) {
  341. if (hasOwn.call(obj, key)) keys.push(key);
  342. }
  343. return keys;
  344. };
  345. },{"util/":10}],6:[function(require,module,exports){
  346. // Copyright Joyent, Inc. and other Node contributors.
  347. //
  348. // Permission is hereby granted, free of charge, to any person obtaining a
  349. // copy of this software and associated documentation files (the
  350. // "Software"), to deal in the Software without restriction, including
  351. // without limitation the rights to use, copy, modify, merge, publish,
  352. // distribute, sublicense, and/or sell copies of the Software, and to permit
  353. // persons to whom the Software is furnished to do so, subject to the
  354. // following conditions:
  355. //
  356. // The above copyright notice and this permission notice shall be included
  357. // in all copies or substantial portions of the Software.
  358. //
  359. // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  360. // OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  361. // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
  362. // NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
  363. // DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  364. // OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  365. // USE OR OTHER DEALINGS IN THE SOFTWARE.
  366. function EventEmitter() {
  367. this._events = this._events || {};
  368. this._maxListeners = this._maxListeners || undefined;
  369. }
  370. module.exports = EventEmitter;
  371. // Backwards-compat with node 0.10.x
  372. EventEmitter.EventEmitter = EventEmitter;
  373. EventEmitter.prototype._events = undefined;
  374. EventEmitter.prototype._maxListeners = undefined;
  375. // By default EventEmitters will print a warning if more than 10 listeners are
  376. // added to it. This is a useful default which helps finding memory leaks.
  377. EventEmitter.defaultMaxListeners = 10;
  378. // Obviously not all Emitters should be limited to 10. This function allows
  379. // that to be increased. Set to zero for unlimited.
  380. EventEmitter.prototype.setMaxListeners = function(n) {
  381. if (!isNumber(n) || n < 0 || isNaN(n))
  382. throw TypeError('n must be a positive number');
  383. this._maxListeners = n;
  384. return this;
  385. };
  386. EventEmitter.prototype.emit = function(type) {
  387. var er, handler, len, args, i, listeners;
  388. if (!this._events)
  389. this._events = {};
  390. // If there is no 'error' event listener then throw.
  391. if (type === 'error') {
  392. if (!this._events.error ||
  393. (isObject(this._events.error) && !this._events.error.length)) {
  394. er = arguments[1];
  395. if (er instanceof Error) {
  396. throw er; // Unhandled 'error' event
  397. }
  398. throw TypeError('Uncaught, unspecified "error" event.');
  399. }
  400. }
  401. handler = this._events[type];
  402. if (isUndefined(handler))
  403. return false;
  404. if (isFunction(handler)) {
  405. switch (arguments.length) {
  406. // fast cases
  407. case 1:
  408. handler.call(this);
  409. break;
  410. case 2:
  411. handler.call(this, arguments[1]);
  412. break;
  413. case 3:
  414. handler.call(this, arguments[1], arguments[2]);
  415. break;
  416. // slower
  417. default:
  418. len = arguments.length;
  419. args = new Array(len - 1);
  420. for (i = 1; i < len; i++)
  421. args[i - 1] = arguments[i];
  422. handler.apply(this, args);
  423. }
  424. } else if (isObject(handler)) {
  425. len = arguments.length;
  426. args = new Array(len - 1);
  427. for (i = 1; i < len; i++)
  428. args[i - 1] = arguments[i];
  429. listeners = handler.slice();
  430. len = listeners.length;
  431. for (i = 0; i < len; i++)
  432. listeners[i].apply(this, args);
  433. }
  434. return true;
  435. };
  436. EventEmitter.prototype.addListener = function(type, listener) {
  437. var m;
  438. if (!isFunction(listener))
  439. throw TypeError('listener must be a function');
  440. if (!this._events)
  441. this._events = {};
  442. // To avoid recursion in the case that type === "newListener"! Before
  443. // adding it to the listeners, first emit "newListener".
  444. if (this._events.newListener)
  445. this.emit('newListener', type,
  446. isFunction(listener.listener) ?
  447. listener.listener : listener);
  448. if (!this._events[type])
  449. // Optimize the case of one listener. Don't need the extra array object.
  450. this._events[type] = listener;
  451. else if (isObject(this._events[type]))
  452. // If we've already got an array, just append.
  453. this._events[type].push(listener);
  454. else
  455. // Adding the second element, need to change to array.
  456. this._events[type] = [this._events[type], listener];
  457. // Check for listener leak
  458. if (isObject(this._events[type]) && !this._events[type].warned) {
  459. var m;
  460. if (!isUndefined(this._maxListeners)) {
  461. m = this._maxListeners;
  462. } else {
  463. m = EventEmitter.defaultMaxListeners;
  464. }
  465. if (m && m > 0 && this._events[type].length > m) {
  466. this._events[type].warned = true;
  467. console.error('(node) warning: possible EventEmitter memory ' +
  468. 'leak detected. %d listeners added. ' +
  469. 'Use emitter.setMaxListeners() to increase limit.',
  470. this._events[type].length);
  471. if (typeof console.trace === 'function') {
  472. // not supported in IE 10
  473. console.trace();
  474. }
  475. }
  476. }
  477. return this;
  478. };
  479. EventEmitter.prototype.on = EventEmitter.prototype.addListener;
  480. EventEmitter.prototype.once = function(type, listener) {
  481. if (!isFunction(listener))
  482. throw TypeError('listener must be a function');
  483. var fired = false;
  484. function g() {
  485. this.removeListener(type, g);
  486. if (!fired) {
  487. fired = true;
  488. listener.apply(this, arguments);
  489. }
  490. }
  491. g.listener = listener;
  492. this.on(type, g);
  493. return this;
  494. };
  495. // emits a 'removeListener' event iff the listener was removed
  496. EventEmitter.prototype.removeListener = function(type, listener) {
  497. var list, position, length, i;
  498. if (!isFunction(listener))
  499. throw TypeError('listener must be a function');
  500. if (!this._events || !this._events[type])
  501. return this;
  502. list = this._events[type];
  503. length = list.length;
  504. position = -1;
  505. if (list === listener ||
  506. (isFunction(list.listener) && list.listener === listener)) {
  507. delete this._events[type];
  508. if (this._events.removeListener)
  509. this.emit('removeListener', type, listener);
  510. } else if (isObject(list)) {
  511. for (i = length; i-- > 0;) {
  512. if (list[i] === listener ||
  513. (list[i].listener && list[i].listener === listener)) {
  514. position = i;
  515. break;
  516. }
  517. }
  518. if (position < 0)
  519. return this;
  520. if (list.length === 1) {
  521. list.length = 0;
  522. delete this._events[type];
  523. } else {
  524. list.splice(position, 1);
  525. }
  526. if (this._events.removeListener)
  527. this.emit('removeListener', type, listener);
  528. }
  529. return this;
  530. };
  531. EventEmitter.prototype.removeAllListeners = function(type) {
  532. var key, listeners;
  533. if (!this._events)
  534. return this;
  535. // not listening for removeListener, no need to emit
  536. if (!this._events.removeListener) {
  537. if (arguments.length === 0)
  538. this._events = {};
  539. else if (this._events[type])
  540. delete this._events[type];
  541. return this;
  542. }
  543. // emit removeListener for all listeners on all events
  544. if (arguments.length === 0) {
  545. for (key in this._events) {
  546. if (key === 'removeListener') continue;
  547. this.removeAllListeners(key);
  548. }
  549. this.removeAllListeners('removeListener');
  550. this._events = {};
  551. return this;
  552. }
  553. listeners = this._events[type];
  554. if (isFunction(listeners)) {
  555. this.removeListener(type, listeners);
  556. } else {
  557. // LIFO order
  558. while (listeners.length)
  559. this.removeListener(type, listeners[listeners.length - 1]);
  560. }
  561. delete this._events[type];
  562. return this;
  563. };
  564. EventEmitter.prototype.listeners = function(type) {
  565. var ret;
  566. if (!this._events || !this._events[type])
  567. ret = [];
  568. else if (isFunction(this._events[type]))
  569. ret = [this._events[type]];
  570. else
  571. ret = this._events[type].slice();
  572. return ret;
  573. };
  574. EventEmitter.listenerCount = function(emitter, type) {
  575. var ret;
  576. if (!emitter._events || !emitter._events[type])
  577. ret = 0;
  578. else if (isFunction(emitter._events[type]))
  579. ret = 1;
  580. else
  581. ret = emitter._events[type].length;
  582. return ret;
  583. };
  584. function isFunction(arg) {
  585. return typeof arg === 'function';
  586. }
  587. function isNumber(arg) {
  588. return typeof arg === 'number';
  589. }
  590. function isObject(arg) {
  591. return typeof arg === 'object' && arg !== null;
  592. }
  593. function isUndefined(arg) {
  594. return arg === void 0;
  595. }
  596. },{}],7:[function(require,module,exports){
  597. // shim for using process in browser
  598. var process = module.exports = {};
  599. var queue = [];
  600. var draining = false;
  601. function drainQueue() {
  602. if (draining) {
  603. return;
  604. }
  605. draining = true;
  606. var currentQueue;
  607. var len = queue.length;
  608. while(len) {
  609. currentQueue = queue;
  610. queue = [];
  611. var i = -1;
  612. while (++i < len) {
  613. currentQueue[i]();
  614. }
  615. len = queue.length;
  616. }
  617. draining = false;
  618. }
  619. process.nextTick = function (fun) {
  620. queue.push(fun);
  621. if (!draining) {
  622. setTimeout(drainQueue, 0);
  623. }
  624. };
  625. process.title = 'browser';
  626. process.browser = true;
  627. process.env = {};
  628. process.argv = [];
  629. process.version = ''; // empty string to avoid regexp issues
  630. process.versions = {};
  631. function noop() {}
  632. process.on = noop;
  633. process.addListener = noop;
  634. process.once = noop;
  635. process.off = noop;
  636. process.removeListener = noop;
  637. process.removeAllListeners = noop;
  638. process.emit = noop;
  639. process.binding = function (name) {
  640. throw new Error('process.binding is not supported');
  641. };
  642. // TODO(shtylman)
  643. process.cwd = function () { return '/' };
  644. process.chdir = function (dir) {
  645. throw new Error('process.chdir is not supported');
  646. };
  647. process.umask = function() { return 0; };
  648. },{}],8:[function(require,module,exports){
  649. if (typeof Object.create === 'function') {
  650. // implementation from standard node.js 'util' module
  651. module.exports = function inherits(ctor, superCtor) {
  652. ctor.super_ = superCtor
  653. ctor.prototype = Object.create(superCtor.prototype, {
  654. constructor: {
  655. value: ctor,
  656. enumerable: false,
  657. writable: true,
  658. configurable: true
  659. }
  660. });
  661. };
  662. } else {
  663. // old school shim for old browsers
  664. module.exports = function inherits(ctor, superCtor) {
  665. ctor.super_ = superCtor
  666. var TempCtor = function () {}
  667. TempCtor.prototype = superCtor.prototype
  668. ctor.prototype = new TempCtor()
  669. ctor.prototype.constructor = ctor
  670. }
  671. }
  672. },{}],9:[function(require,module,exports){
  673. module.exports = function isBuffer(arg) {
  674. return arg && typeof arg === 'object'
  675. && typeof arg.copy === 'function'
  676. && typeof arg.fill === 'function'
  677. && typeof arg.readUInt8 === 'function';
  678. }
  679. },{}],10:[function(require,module,exports){
  680. (function (process,global){
  681. // Copyright Joyent, Inc. and other Node contributors.
  682. //
  683. // Permission is hereby granted, free of charge, to any person obtaining a
  684. // copy of this software and associated documentation files (the
  685. // "Software"), to deal in the Software without restriction, including
  686. // without limitation the rights to use, copy, modify, merge, publish,
  687. // distribute, sublicense, and/or sell copies of the Software, and to permit
  688. // persons to whom the Software is furnished to do so, subject to the
  689. // following conditions:
  690. //
  691. // The above copyright notice and this permission notice shall be included
  692. // in all copies or substantial portions of the Software.
  693. //
  694. // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  695. // OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  696. // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
  697. // NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
  698. // DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  699. // OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  700. // USE OR OTHER DEALINGS IN THE SOFTWARE.
  701. var formatRegExp = /%[sdj%]/g;
  702. exports.format = function(f) {
  703. if (!isString(f)) {
  704. var objects = [];
  705. for (var i = 0; i < arguments.length; i++) {
  706. objects.push(inspect(arguments[i]));
  707. }
  708. return objects.join(' ');
  709. }
  710. var i = 1;
  711. var args = arguments;
  712. var len = args.length;
  713. var str = String(f).replace(formatRegExp, function(x) {
  714. if (x === '%%') return '%';
  715. if (i >= len) return x;
  716. switch (x) {
  717. case '%s': return String(args[i++]);
  718. case '%d': return Number(args[i++]);
  719. case '%j':
  720. try {
  721. return JSON.stringify(args[i++]);
  722. } catch (_) {
  723. return '[Circular]';
  724. }
  725. default:
  726. return x;
  727. }
  728. });
  729. for (var x = args[i]; i < len; x = args[++i]) {
  730. if (isNull(x) || !isObject(x)) {
  731. str += ' ' + x;
  732. } else {
  733. str += ' ' + inspect(x);
  734. }
  735. }
  736. return str;
  737. };
  738. // Mark that a method should not be used.
  739. // Returns a modified function which warns once by default.
  740. // If --no-deprecation is set, then it is a no-op.
  741. exports.deprecate = function(fn, msg) {
  742. // Allow for deprecating things in the process of starting up.
  743. if (isUndefined(global.process)) {
  744. return function() {
  745. return exports.deprecate(fn, msg).apply(this, arguments);
  746. };
  747. }
  748. if (process.noDeprecation === true) {
  749. return fn;
  750. }
  751. var warned = false;
  752. function deprecated() {
  753. if (!warned) {
  754. if (process.throwDeprecation) {
  755. throw new Error(msg);
  756. } else if (process.traceDeprecation) {
  757. console.trace(msg);
  758. } else {
  759. console.error(msg);
  760. }
  761. warned = true;
  762. }
  763. return fn.apply(this, arguments);
  764. }
  765. return deprecated;
  766. };
  767. var debugs = {};
  768. var debugEnviron;
  769. exports.debuglog = function(set) {
  770. if (isUndefined(debugEnviron))
  771. debugEnviron = process.env.NODE_DEBUG || '';
  772. set = set.toUpperCase();
  773. if (!debugs[set]) {
  774. if (new RegExp('\\b' + set + '\\b', 'i').test(debugEnviron)) {
  775. var pid = process.pid;
  776. debugs[set] = function() {
  777. var msg = exports.format.apply(exports, arguments);
  778. console.error('%s %d: %s', set, pid, msg);
  779. };
  780. } else {
  781. debugs[set] = function() {};
  782. }
  783. }
  784. return debugs[set];
  785. };
  786. /**
  787. * Echos the value of a value. Trys to print the value out
  788. * in the best way possible given the different types.
  789. *
  790. * @param {Object} obj The object to print out.
  791. * @param {Object} opts Optional options object that alters the output.
  792. */
  793. /* legacy: obj, showHidden, depth, colors*/
  794. function inspect(obj, opts) {
  795. // default options
  796. var ctx = {
  797. seen: [],
  798. stylize: stylizeNoColor
  799. };
  800. // legacy...
  801. if (arguments.length >= 3) ctx.depth = arguments[2];
  802. if (arguments.length >= 4) ctx.colors = arguments[3];
  803. if (isBoolean(opts)) {
  804. // legacy...
  805. ctx.showHidden = opts;
  806. } else if (opts) {
  807. // got an "options" object
  808. exports._extend(ctx, opts);
  809. }
  810. // set default options
  811. if (isUndefined(ctx.showHidden)) ctx.showHidden = false;
  812. if (isUndefined(ctx.depth)) ctx.depth = 2;
  813. if (isUndefined(ctx.colors)) ctx.colors = false;
  814. if (isUndefined(ctx.customInspect)) ctx.customInspect = true;
  815. if (ctx.colors) ctx.stylize = stylizeWithColor;
  816. return formatValue(ctx, obj, ctx.depth);
  817. }
  818. exports.inspect = inspect;
  819. // http://en.wikipedia.org/wiki/ANSI_escape_code#graphics
  820. inspect.colors = {
  821. 'bold' : [1, 22],
  822. 'italic' : [3, 23],
  823. 'underline' : [4, 24],
  824. 'inverse' : [7, 27],
  825. 'white' : [37, 39],
  826. 'grey' : [90, 39],
  827. 'black' : [30, 39],
  828. 'blue' : [34, 39],
  829. 'cyan' : [36, 39],
  830. 'green' : [32, 39],
  831. 'magenta' : [35, 39],
  832. 'red' : [31, 39],
  833. 'yellow' : [33, 39]
  834. };
  835. // Don't use 'blue' not visible on cmd.exe
  836. inspect.styles = {
  837. 'special': 'cyan',
  838. 'number': 'yellow',
  839. 'boolean': 'yellow',
  840. 'undefined': 'grey',
  841. 'null': 'bold',
  842. 'string': 'green',
  843. 'date': 'magenta',
  844. // "name": intentionally not styling
  845. 'regexp': 'red'
  846. };
  847. function stylizeWithColor(str, styleType) {
  848. var style = inspect.styles[styleType];
  849. if (style) {
  850. return '\u001b[' + inspect.colors[style][0] + 'm' + str +
  851. '\u001b[' + inspect.colors[style][1] + 'm';
  852. } else {
  853. return str;
  854. }
  855. }
  856. function stylizeNoColor(str, styleType) {
  857. return str;
  858. }
  859. function arrayToHash(array) {
  860. var hash = {};
  861. array.forEach(function(val, idx) {
  862. hash[val] = true;
  863. });
  864. return hash;
  865. }
  866. function formatValue(ctx, value, recurseTimes) {
  867. // Provide a hook for user-specified inspect functions.
  868. // Check that value is an object with an inspect function on it
  869. if (ctx.customInspect &&
  870. value &&
  871. isFunction(value.inspect) &&
  872. // Filter out the util module, it's inspect function is special
  873. value.inspect !== exports.inspect &&
  874. // Also filter out any prototype objects using the circular check.
  875. !(value.constructor && value.constructor.prototype === value)) {
  876. var ret = value.inspect(recurseTimes, ctx);
  877. if (!isString(ret)) {
  878. ret = formatValue(ctx, ret, recurseTimes);
  879. }
  880. return ret;
  881. }
  882. // Primitive types cannot have properties
  883. var primitive = formatPrimitive(ctx, value);
  884. if (primitive) {
  885. return primitive;
  886. }
  887. // Look up the keys of the object.
  888. var keys = Object.keys(value);
  889. var visibleKeys = arrayToHash(keys);
  890. if (ctx.showHidden) {
  891. keys = Object.getOwnPropertyNames(value);
  892. }
  893. // IE doesn't make error fields non-enumerable
  894. // http://msdn.microsoft.com/en-us/library/ie/dww52sbt(v=vs.94).aspx
  895. if (isError(value)
  896. && (keys.indexOf('message') >= 0 || keys.indexOf('description') >= 0)) {
  897. return formatError(value);
  898. }
  899. // Some type of object without properties can be shortcutted.
  900. if (keys.length === 0) {
  901. if (isFunction(value)) {
  902. var name = value.name ? ': ' + value.name : '';
  903. return ctx.stylize('[Function' + name + ']', 'special');
  904. }
  905. if (isRegExp(value)) {
  906. return ctx.stylize(RegExp.prototype.toString.call(value), 'regexp');
  907. }
  908. if (isDate(value)) {
  909. return ctx.stylize(Date.prototype.toString.call(value), 'date');
  910. }
  911. if (isError(value)) {
  912. return formatError(value);
  913. }
  914. }
  915. var base = '', array = false, braces = ['{', '}'];
  916. // Make Array say that they are Array
  917. if (isArray(value)) {
  918. array = true;
  919. braces = ['[', ']'];
  920. }
  921. // Make functions say that they are functions
  922. if (isFunction(value)) {
  923. var n = value.name ? ': ' + value.name : '';
  924. base = ' [Function' + n + ']';
  925. }
  926. // Make RegExps say that they are RegExps
  927. if (isRegExp(value)) {
  928. base = ' ' + RegExp.prototype.toString.call(value);
  929. }
  930. // Make dates with properties first say the date
  931. if (isDate(value)) {
  932. base = ' ' + Date.prototype.toUTCString.call(value);
  933. }
  934. // Make error with message first say the error
  935. if (isError(value)) {
  936. base = ' ' + formatError(value);
  937. }
  938. if (keys.length === 0 && (!array || value.length == 0)) {
  939. return braces[0] + base + braces[1];
  940. }
  941. if (recurseTimes < 0) {
  942. if (isRegExp(value)) {
  943. return ctx.stylize(RegExp.prototype.toString.call(value), 'regexp');
  944. } else {
  945. return ctx.stylize('[Object]', 'special');
  946. }
  947. }
  948. ctx.seen.push(value);
  949. var output;
  950. if (array) {
  951. output = formatArray(ctx, value, recurseTimes, visibleKeys, keys);
  952. } else {
  953. output = keys.map(function(key) {
  954. return formatProperty(ctx, value, recurseTimes, visibleKeys, key, array);
  955. });
  956. }
  957. ctx.seen.pop();
  958. return reduceToSingleString(output, base, braces);
  959. }
  960. function formatPrimitive(ctx, value) {
  961. if (isUndefined(value))
  962. return ctx.stylize('undefined', 'undefined');
  963. if (isString(value)) {
  964. var simple = '\'' + JSON.stringify(value).replace(/^"|"$/g, '')
  965. .replace(/'/g, "\\'")
  966. .replace(/\\"/g, '"') + '\'';
  967. return ctx.stylize(simple, 'string');
  968. }
  969. if (isNumber(value))
  970. return ctx.stylize('' + value, 'number');
  971. if (isBoolean(value))
  972. return ctx.stylize('' + value, 'boolean');
  973. // For some reason typeof null is "object", so special case here.
  974. if (isNull(value))
  975. return ctx.stylize('null', 'null');
  976. }
  977. function formatError(value) {
  978. return '[' + Error.prototype.toString.call(value) + ']';
  979. }
  980. function formatArray(ctx, value, recurseTimes, visibleKeys, keys) {
  981. var output = [];
  982. for (var i = 0, l = value.length; i < l; ++i) {
  983. if (hasOwnProperty(value, String(i))) {
  984. output.push(formatProperty(ctx, value, recurseTimes, visibleKeys,
  985. String(i), true));
  986. } else {
  987. output.push('');
  988. }
  989. }
  990. keys.forEach(function(key) {
  991. if (!key.match(/^\d+$/)) {
  992. output.push(formatProperty(ctx, value, recurseTimes, visibleKeys,
  993. key, true));
  994. }
  995. });
  996. return output;
  997. }
  998. function formatProperty(ctx, value, recurseTimes, visibleKeys, key, array) {
  999. var name, str, desc;
  1000. desc = Object.getOwnPropertyDescriptor(value, key) || { value: value[key] };
  1001. if (desc.get) {
  1002. if (desc.set) {
  1003. str = ctx.stylize('[Getter/Setter]', 'special');
  1004. } else {
  1005. str = ctx.stylize('[Getter]', 'special');
  1006. }
  1007. } else {
  1008. if (desc.set) {
  1009. str = ctx.stylize('[Setter]', 'special');
  1010. }
  1011. }
  1012. if (!hasOwnProperty(visibleKeys, key)) {
  1013. name = '[' + key + ']';
  1014. }
  1015. if (!str) {
  1016. if (ctx.seen.indexOf(desc.value) < 0) {
  1017. if (isNull(recurseTimes)) {
  1018. str = formatValue(ctx, desc.value, null);
  1019. } else {
  1020. str = formatValue(ctx, desc.value, recurseTimes - 1);
  1021. }
  1022. if (str.indexOf('\n') > -1) {
  1023. if (array) {
  1024. str = str.split('\n').map(function(line) {
  1025. return ' ' + line;
  1026. }).join('\n').substr(2);
  1027. } else {
  1028. str = '\n' + str.split('\n').map(function(line) {
  1029. return ' ' + line;
  1030. }).join('\n');
  1031. }
  1032. }
  1033. } else {
  1034. str = ctx.stylize('[Circular]', 'special');
  1035. }
  1036. }
  1037. if (isUndefined(name)) {
  1038. if (array && key.match(/^\d+$/)) {
  1039. return str;
  1040. }
  1041. name = JSON.stringify('' + key);
  1042. if (name.match(/^"([a-zA-Z_][a-zA-Z_0-9]*)"$/)) {
  1043. name = name.substr(1, name.length - 2);
  1044. name = ctx.stylize(name, 'name');
  1045. } else {
  1046. name = name.replace(/'/g, "\\'")
  1047. .replace(/\\"/g, '"')
  1048. .replace(/(^"|"$)/g, "'");
  1049. name = ctx.stylize(name, 'string');
  1050. }
  1051. }
  1052. return name + ': ' + str;
  1053. }
  1054. function reduceToSingleString(output, base, braces) {
  1055. var numLinesEst = 0;
  1056. var length = output.reduce(function(prev, cur) {
  1057. numLinesEst++;
  1058. if (cur.indexOf('\n') >= 0) numLinesEst++;
  1059. return prev + cur.replace(/\u001b\[\d\d?m/g, '').length + 1;
  1060. }, 0);
  1061. if (length > 60) {
  1062. return braces[0] +
  1063. (base === '' ? '' : base + '\n ') +
  1064. ' ' +
  1065. output.join(',\n ') +
  1066. ' ' +
  1067. braces[1];
  1068. }
  1069. return braces[0] + base + ' ' + output.join(', ') + ' ' + braces[1];
  1070. }
  1071. // NOTE: These type checking functions intentionally don't use `instanceof`
  1072. // because it is fragile and can be easily faked with `Object.create()`.
  1073. function isArray(ar) {
  1074. return Array.isArray(ar);
  1075. }
  1076. exports.isArray = isArray;
  1077. function isBoolean(arg) {
  1078. return typeof arg === 'boolean';
  1079. }
  1080. exports.isBoolean = isBoolean;
  1081. function isNull(arg) {
  1082. return arg === null;
  1083. }
  1084. exports.isNull = isNull;
  1085. function isNullOrUndefined(arg) {
  1086. return arg == null;
  1087. }
  1088. exports.isNullOrUndefined = isNullOrUndefined;
  1089. function isNumber(arg) {
  1090. return typeof arg === 'number';
  1091. }
  1092. exports.isNumber = isNumber;
  1093. function isString(arg) {
  1094. return typeof arg === 'string';
  1095. }
  1096. exports.isString = isString;
  1097. function isSymbol(arg) {
  1098. return typeof arg === 'symbol';
  1099. }
  1100. exports.isSymbol = isSymbol;
  1101. function isUndefined(arg) {
  1102. return arg === void 0;
  1103. }
  1104. exports.isUndefined = isUndefined;
  1105. function isRegExp(re) {
  1106. return isObject(re) && objectToString(re) === '[object RegExp]';
  1107. }
  1108. exports.isRegExp = isRegExp;
  1109. function isObject(arg) {
  1110. return typeof arg === 'object' && arg !== null;
  1111. }
  1112. exports.isObject = isObject;
  1113. function isDate(d) {
  1114. return isObject(d) && objectToString(d) === '[object Date]';
  1115. }
  1116. exports.isDate = isDate;
  1117. function isError(e) {
  1118. return isObject(e) &&
  1119. (objectToString(e) === '[object Error]' || e instanceof Error);
  1120. }
  1121. exports.isError = isError;
  1122. function isFunction(arg) {
  1123. return typeof arg === 'function';
  1124. }
  1125. exports.isFunction = isFunction;
  1126. function isPrimitive(arg) {
  1127. return arg === null ||
  1128. typeof arg === 'boolean' ||
  1129. typeof arg === 'number' ||
  1130. typeof arg === 'string' ||
  1131. typeof arg === 'symbol' || // ES6 symbol
  1132. typeof arg === 'undefined';
  1133. }
  1134. exports.isPrimitive = isPrimitive;
  1135. exports.isBuffer = require('./support/isBuffer');
  1136. function objectToString(o) {
  1137. return Object.prototype.toString.call(o);
  1138. }
  1139. function pad(n) {
  1140. return n < 10 ? '0' + n.toString(10) : n.toString(10);
  1141. }
  1142. var months = ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep',
  1143. 'Oct', 'Nov', 'Dec'];
  1144. // 26 Feb 16:19:34
  1145. function timestamp() {
  1146. var d = new Date();
  1147. var time = [pad(d.getHours()),
  1148. pad(d.getMinutes()),
  1149. pad(d.getSeconds())].join(':');
  1150. return [d.getDate(), months[d.getMonth()], time].join(' ');
  1151. }
  1152. // log is just a thin wrapper to console.log that prepends a timestamp
  1153. exports.log = function() {
  1154. console.log('%s - %s', timestamp(), exports.format.apply(exports, arguments));
  1155. };
  1156. /**
  1157. * Inherit the prototype methods from one constructor into another.
  1158. *
  1159. * The Function.prototype.inherits from lang.js rewritten as a standalone
  1160. * function (not on Function.prototype). NOTE: If this file is to be loaded
  1161. * during bootstrapping this function needs to be rewritten using some native
  1162. * functions as prototype setup using normal JavaScript does not work as
  1163. * expected during bootstrapping (see mirror.js in r114903).
  1164. *
  1165. * @param {function} ctor Constructor function which needs to inherit the
  1166. * prototype.
  1167. * @param {function} superCtor Constructor function to inherit prototype from.
  1168. */
  1169. exports.inherits = require('inherits');
  1170. exports._extend = function(origin, add) {
  1171. // Don't do anything if add isn't an object
  1172. if (!add || !isObject(add)) return origin;
  1173. var keys = Object.keys(add);
  1174. var i = keys.length;
  1175. while (i--) {
  1176. origin[keys[i]] = add[keys[i]];
  1177. }
  1178. return origin;
  1179. };
  1180. function hasOwnProperty(obj, prop) {
  1181. return Object.prototype.hasOwnProperty.call(obj, prop);
  1182. }
  1183. }).call(this,require('_process'),typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
  1184. },{"./support/isBuffer":9,"_process":7,"inherits":8}],11:[function(require,module,exports){
  1185. (function (global){
  1186. /*global window, global*/
  1187. var util = require("util")
  1188. var assert = require("assert")
  1189. var now = require("date-now")
  1190. var slice = Array.prototype.slice
  1191. var console
  1192. var times = {}
  1193. if (typeof global !== "undefined" && global.console) {
  1194. console = global.console
  1195. } else if (typeof window !== "undefined" && window.console) {
  1196. console = window.console
  1197. } else {
  1198. console = {}
  1199. }
  1200. var functions = [
  1201. [log, "log"],
  1202. [info, "info"],
  1203. [warn, "warn"],
  1204. [error, "error"],
  1205. [time, "time"],
  1206. [timeEnd, "timeEnd"],
  1207. [trace, "trace"],
  1208. [dir, "dir"],
  1209. [consoleAssert, "assert"]
  1210. ]
  1211. for (var i = 0; i < functions.length; i++) {
  1212. var tuple = functions[i]
  1213. var f = tuple[0]
  1214. var name = tuple[1]
  1215. if (!console[name]) {
  1216. console[name] = f
  1217. }
  1218. }
  1219. module.exports = console
  1220. function log() {}
  1221. function info() {
  1222. console.log.apply(console, arguments)
  1223. }
  1224. function warn() {
  1225. console.log.apply(console, arguments)
  1226. }
  1227. function error() {
  1228. console.warn.apply(console, arguments)
  1229. }
  1230. function time(label) {
  1231. times[label] = now()
  1232. }
  1233. function timeEnd(label) {
  1234. var time = times[label]
  1235. if (!time) {
  1236. throw new Error("No such label: " + label)
  1237. }
  1238. var duration = now() - time
  1239. console.log(label + ": " + duration + "ms")
  1240. }
  1241. function trace() {
  1242. var err = new Error()
  1243. err.name = "Trace"
  1244. err.message = util.format.apply(null, arguments)
  1245. console.error(err.stack)
  1246. }
  1247. function dir(object) {
  1248. console.log(util.inspect(object) + "\n")
  1249. }
  1250. function consoleAssert(expression) {
  1251. if (!expression) {
  1252. var arr = slice.call(arguments, 1)
  1253. assert.ok(false, util.format.apply(null, arr))
  1254. }
  1255. }
  1256. }).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
  1257. },{"assert":5,"date-now":12,"util":10}],12:[function(require,module,exports){
  1258. module.exports = now
  1259. function now() {
  1260. return new Date().getTime()
  1261. }
  1262. },{}],13:[function(require,module,exports){
  1263. (function (global){
  1264. /**
  1265. * @license
  1266. * Lodash <https://lodash.com/>
  1267. * Copyright JS Foundation and other contributors <https://js.foundation/>
  1268. * Released under MIT license <https://lodash.com/license>
  1269. * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
  1270. * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
  1271. */
  1272. ;(function() {
  1273. /** Used as a safe reference for `undefined` in pre-ES5 environments. */
  1274. var undefined;
  1275. /** Used as the semantic version number. */
  1276. var VERSION = '4.17.10';
  1277. /** Used as the size to enable large array optimizations. */
  1278. var LARGE_ARRAY_SIZE = 200;
  1279. /** Error message constants. */
  1280. var CORE_ERROR_TEXT = 'Unsupported core-js use. Try https://npms.io/search?q=ponyfill.',
  1281. FUNC_ERROR_TEXT = 'Expected a function';
  1282. /** Used to stand-in for `undefined` hash values. */
  1283. var HASH_UNDEFINED = '__lodash_hash_undefined__';
  1284. /** Used as the maximum memoize cache size. */
  1285. var MAX_MEMOIZE_SIZE = 500;
  1286. /** Used as the internal argument placeholder. */
  1287. var PLACEHOLDER = '__lodash_placeholder__';
  1288. /** Used to compose bitmasks for cloning. */
  1289. var CLONE_DEEP_FLAG = 1,
  1290. CLONE_FLAT_FLAG = 2,
  1291. CLONE_SYMBOLS_FLAG = 4;
  1292. /** Used to compose bitmasks for value comparisons. */
  1293. var COMPARE_PARTIAL_FLAG = 1,
  1294. COMPARE_UNORDERED_FLAG = 2;
  1295. /** Used to compose bitmasks for function metadata. */
  1296. var WRAP_BIND_FLAG = 1,
  1297. WRAP_BIND_KEY_FLAG = 2,
  1298. WRAP_CURRY_BOUND_FLAG = 4,
  1299. WRAP_CURRY_FLAG = 8,
  1300. WRAP_CURRY_RIGHT_FLAG = 16,
  1301. WRAP_PARTIAL_FLAG = 32,
  1302. WRAP_PARTIAL_RIGHT_FLAG = 64,
  1303. WRAP_ARY_FLAG = 128,
  1304. WRAP_REARG_FLAG = 256,
  1305. WRAP_FLIP_FLAG = 512;
  1306. /** Used as default options for `_.truncate`. */
  1307. var DEFAULT_TRUNC_LENGTH = 30,
  1308. DEFAULT_TRUNC_OMISSION = '...';
  1309. /** Used to detect hot functions by number of calls within a span of milliseconds. */
  1310. var HOT_COUNT = 800,
  1311. HOT_SPAN = 16;
  1312. /** Used to indicate the type of lazy iteratees. */
  1313. var LAZY_FILTER_FLAG = 1,
  1314. LAZY_MAP_FLAG = 2,
  1315. LAZY_WHILE_FLAG = 3;
  1316. /** Used as references for various `Number` constants. */
  1317. var INFINITY = 1 / 0,
  1318. MAX_SAFE_INTEGER = 9007199254740991,
  1319. MAX_INTEGER = 1.7976931348623157e+308,
  1320. NAN = 0 / 0;
  1321. /** Used as references for the maximum length and index of an array. */
  1322. var MAX_ARRAY_LENGTH = 4294967295,
  1323. MAX_ARRAY_INDEX = MAX_ARRAY_LENGTH - 1,
  1324. HALF_MAX_ARRAY_LENGTH = MAX_ARRAY_LENGTH >>> 1;
  1325. /** Used to associate wrap methods with their bit flags. */
  1326. var wrapFlags = [
  1327. ['ary', WRAP_ARY_FLAG],
  1328. ['bind', WRAP_BIND_FLAG],
  1329. ['bindKey', WRAP_BIND_KEY_FLAG],
  1330. ['curry', WRAP_CURRY_FLAG],
  1331. ['curryRight', WRAP_CURRY_RIGHT_FLAG],
  1332. ['flip', WRAP_FLIP_FLAG],
  1333. ['partial', WRAP_PARTIAL_FLAG],
  1334. ['partialRight', WRAP_PARTIAL_RIGHT_FLAG],
  1335. ['rearg', WRAP_REARG_FLAG]
  1336. ];
  1337. /** `Object#toString` result references. */
  1338. var argsTag = '[object Arguments]',
  1339. arrayTag = '[object Array]',
  1340. asyncTag = '[object AsyncFunction]',
  1341. boolTag = '[object Boolean]',
  1342. dateTag = '[object Date]',
  1343. domExcTag = '[object DOMException]',
  1344. errorTag = '[object Error]',
  1345. funcTag = '[object Function]',
  1346. genTag = '[object GeneratorFunction]',
  1347. mapTag = '[object Map]',
  1348. numberTag = '[object Number]',
  1349. nullTag = '[object Null]',
  1350. objectTag = '[object Object]',
  1351. promiseTag = '[object Promise]',
  1352. proxyTag = '[object Proxy]',
  1353. regexpTag = '[object RegExp]',
  1354. setTag = '[object Set]',
  1355. stringTag = '[object String]',
  1356. symbolTag = '[object Symbol]',
  1357. undefinedTag = '[object Undefined]',
  1358. weakMapTag = '[object WeakMap]',
  1359. weakSetTag = '[object WeakSet]';
  1360. var arrayBufferTag = '[object ArrayBuffer]',
  1361. dataViewTag = '[object DataView]',
  1362. float32Tag = '[object Float32Array]',
  1363. float64Tag = '[object Float64Array]',
  1364. int8Tag = '[object Int8Array]',
  1365. int16Tag = '[object Int16Array]',
  1366. int32Tag = '[object Int32Array]',
  1367. uint8Tag = '[object Uint8Array]',
  1368. uint8ClampedTag = '[object Uint8ClampedArray]',
  1369. uint16Tag = '[object Uint16Array]',
  1370. uint32Tag = '[object Uint32Array]';
  1371. /** Used to match empty string literals in compiled template source. */
  1372. var reEmptyStringLeading = /\b__p \+= '';/g,
  1373. reEmptyStringMiddle = /\b(__p \+=) '' \+/g,
  1374. reEmptyStringTrailing = /(__e\(.*?\)|\b__t\)) \+\n'';/g;
  1375. /** Used to match HTML entities and HTML characters. */
  1376. var reEscapedHtml = /&(?:amp|lt|gt|quot|#39);/g,
  1377. reUnescapedHtml = /[&<>"']/g,
  1378. reHasEscapedHtml = RegExp(reEscapedHtml.source),
  1379. reHasUnescapedHtml = RegExp(reUnescapedHtml.source);
  1380. /** Used to match template delimiters. */
  1381. var reEscape = /<%-([\s\S]+?)%>/g,
  1382. reEvaluate = /<%([\s\S]+?)%>/g,
  1383. reInterpolate = /<%=([\s\S]+?)%>/g;
  1384. /** Used to match property names within property paths. */
  1385. var reIsDeepProp = /\.|\[(?:[^[\]]*|(["'])(?:(?!\1)[^\\]|\\.)*?\1)\]/,
  1386. reIsPlainProp = /^\w*$/,
  1387. rePropName = /[^.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\\]|\\.)*?)\2)\]|(?=(?:\.|\[\])(?:\.|\[\]|$))/g;
  1388. /**
  1389. * Used to match `RegExp`
  1390. * [syntax characters](http://ecma-international.org/ecma-262/7.0/#sec-patterns).
  1391. */
  1392. var reRegExpChar = /[\\^$.*+?()[\]{}|]/g,
  1393. reHasRegExpChar = RegExp(reRegExpChar.source);
  1394. /** Used to match leading and trailing whitespace. */
  1395. var reTrim = /^\s+|\s+$/g,
  1396. reTrimStart = /^\s+/,
  1397. reTrimEnd = /\s+$/;
  1398. /** Used to match wrap detail comments. */
  1399. var reWrapComment = /\{(?:\n\/\* \[wrapped with .+\] \*\/)?\n?/,
  1400. reWrapDetails = /\{\n\/\* \[wrapped with (.+)\] \*/,
  1401. reSplitDetails = /,? & /;
  1402. /** Used to match words composed of alphanumeric characters. */
  1403. var reAsciiWord = /[^\x00-\x2f\x3a-\x40\x5b-\x60\x7b-\x7f]+/g;
  1404. /** Used to match backslashes in property paths. */
  1405. var reEscapeChar = /\\(\\)?/g;
  1406. /**
  1407. * Used to match
  1408. * [ES template delimiters](http://ecma-international.org/ecma-262/7.0/#sec-template-literal-lexical-components).
  1409. */
  1410. var reEsTemplate = /\$\{([^\\}]*(?:\\.[^\\}]*)*)\}/g;
  1411. /** Used to match `RegExp` flags from their coerced string values. */
  1412. var reFlags = /\w*$/;
  1413. /** Used to detect bad signed hexadecimal string values. */
  1414. var reIsBadHex = /^[-+]0x[0-9a-f]+$/i;
  1415. /** Used to detect binary string values. */
  1416. var reIsBinary = /^0b[01]+$/i;
  1417. /** Used to detect host constructors (Safari). */
  1418. var reIsHostCtor = /^\[object .+?Constructor\]$/;
  1419. /** Used to detect octal string values. */
  1420. var reIsOctal = /^0o[0-7]+$/i;
  1421. /** Used to detect unsigned integer values. */
  1422. var reIsUint = /^(?:0|[1-9]\d*)$/;
  1423. /** Used to match Latin Unicode letters (excluding mathematical operators). */
  1424. var reLatin = /[\xc0-\xd6\xd8-\xf6\xf8-\xff\u0100-\u017f]/g;
  1425. /** Used to ensure capturing order of template delimiters. */
  1426. var reNoMatch = /($^)/;
  1427. /** Used to match unescaped characters in compiled string literals. */
  1428. var reUnescapedString = /['\n\r\u2028\u2029\\]/g;
  1429. /** Used to compose unicode character classes. */
  1430. var rsAstralRange = '\\ud800-\\udfff',
  1431. rsComboMarksRange = '\\u0300-\\u036f',
  1432. reComboHalfMarksRange = '\\ufe20-\\ufe2f',
  1433. rsComboSymbolsRange = '\\u20d0-\\u20ff',
  1434. rsComboRange = rsComboMarksRange + reComboHalfMarksRange + rsComboSymbolsRange,
  1435. rsDingbatRange = '\\u2700-\\u27bf',
  1436. rsLowerRange = 'a-z\\xdf-\\xf6\\xf8-\\xff',
  1437. rsMathOpRange = '\\xac\\xb1\\xd7\\xf7',
  1438. rsNonCharRange = '\\x00-\\x2f\\x3a-\\x40\\x5b-\\x60\\x7b-\\xbf',
  1439. rsPunctuationRange = '\\u2000-\\u206f',
  1440. rsSpaceRange = ' \\t\\x0b\\f\\xa0\\ufeff\\n\\r\\u2028\\u2029\\u1680\\u180e\\u2000\\u2001\\u2002\\u2003\\u2004\\u2005\\u2006\\u2007\\u2008\\u2009\\u200a\\u202f\\u205f\\u3000',
  1441. rsUpperRange = 'A-Z\\xc0-\\xd6\\xd8-\\xde',
  1442. rsVarRange = '\\ufe0e\\ufe0f',
  1443. rsBreakRange = rsMathOpRange + rsNonCharRange + rsPunctuationRange + rsSpaceRange;
  1444. /** Used to compose unicode capture groups. */
  1445. var rsApos = "['\u2019]",
  1446. rsAstral = '[' + rsAstralRange + ']',
  1447. rsBreak = '[' + rsBreakRange + ']',
  1448. rsCombo = '[' + rsComboRange + ']',
  1449. rsDigits = '\\d+',
  1450. rsDingbat = '[' + rsDingbatRange + ']',
  1451. rsLower = '[' + rsLowerRange + ']',
  1452. rsMisc = '[^' + rsAstralRange + rsBreakRange + rsDigits + rsDingbatRange + rsLowerRange + rsUpperRange + ']',
  1453. rsFitz = '\\ud83c[\\udffb-\\udfff]',
  1454. rsModifier = '(?:' + rsCombo + '|' + rsFitz + ')',
  1455. rsNonAstral = '[^' + rsAstralRange + ']',
  1456. rsRegional = '(?:\\ud83c[\\udde6-\\uddff]){2}',
  1457. rsSurrPair = '[\\ud800-\\udbff][\\udc00-\\udfff]',
  1458. rsUpper = '[' + rsUpperRange + ']',
  1459. rsZWJ = '\\u200d';
  1460. /** Used to compose unicode regexes. */
  1461. var rsMiscLower = '(?:' + rsLower + '|' + rsMisc + ')',
  1462. rsMiscUpper = '(?:' + rsUpper + '|' + rsMisc + ')',
  1463. rsOptContrLower = '(?:' + rsApos + '(?:d|ll|m|re|s|t|ve))?',
  1464. rsOptContrUpper = '(?:' + rsApos + '(?:D|LL|M|RE|S|T|VE))?',
  1465. reOptMod = rsModifier + '?',
  1466. rsOptVar = '[' + rsVarRange + ']?',
  1467. rsOptJoin = '(?:' + rsZWJ + '(?:' + [rsNonAstral, rsRegional, rsSurrPair].join('|') + ')' + rsOptVar + reOptMod + ')*',
  1468. rsOrdLower = '\\d*(?:1st|2nd|3rd|(?![123])\\dth)(?=\\b|[A-Z_])',
  1469. rsOrdUpper = '\\d*(?:1ST|2ND|3RD|(?![123])\\dTH)(?=\\b|[a-z_])',
  1470. rsSeq = rsOptVar + reOptMod + rsOptJoin,
  1471. rsEmoji = '(?:' + [rsDingbat, rsRegional, rsSurrPair].join('|') + ')' + rsSeq,
  1472. rsSymbol = '(?:' + [rsNonAstral + rsCombo + '?', rsCombo, rsRegional, rsSurrPair, rsAstral].join('|') + ')';
  1473. /** Used to match apostrophes. */
  1474. var reApos = RegExp(rsApos, 'g');
  1475. /**
  1476. * Used to match [combining diacritical marks](https://en.wikipedia.org/wiki/Combining_Diacritical_Marks) and
  1477. * [combining diacritical marks for symbols](https://en.wikipedia.org/wiki/Combining_Diacritical_Marks_for_Symbols).
  1478. */
  1479. var reComboMark = RegExp(rsCombo, 'g');
  1480. /** Used to match [string symbols](https://mathiasbynens.be/notes/javascript-unicode). */
  1481. var reUnicode = RegExp(rsFitz + '(?=' + rsFitz + ')|' + rsSymbol + rsSeq, 'g');
  1482. /** Used to match complex or compound words. */
  1483. var reUnicodeWord = RegExp([
  1484. rsUpper + '?' + rsLower + '+' + rsOptContrLower + '(?=' + [rsBreak, rsUpper, '$'].join('|') + ')',
  1485. rsMiscUpper + '+' + rsOptContrUpper + '(?=' + [rsBreak, rsUpper + rsMiscLower, '$'].join('|') + ')',
  1486. rsUpper + '?' + rsMiscLower + '+' + rsOptContrLower,
  1487. rsUpper + '+' + rsOptContrUpper,
  1488. rsOrdUpper,
  1489. rsOrdLower,
  1490. rsDigits,
  1491. rsEmoji
  1492. ].join('|'), 'g');
  1493. /** Used to detect strings with [zero-width joiners or code points from the astral planes](http://eev.ee/blog/2015/09/12/dark-corners-of-unicode/). */
  1494. var reHasUnicode = RegExp('[' + rsZWJ + rsAstralRange + rsComboRange + rsVarRange + ']');
  1495. /** Used to detect strings that need a more robust regexp to match words. */
  1496. var reHasUnicodeWord = /[a-z][A-Z]|[A-Z]{2,}[a-z]|[0-9][a-zA-Z]|[a-zA-Z][0-9]|[^a-zA-Z0-9 ]/;
  1497. /** Used to assign default `context` object properties. */
  1498. var contextProps = [
  1499. 'Array', 'Buffer', 'DataView', 'Date', 'Error', 'Float32Array', 'Float64Array',
  1500. 'Function', 'Int8Array', 'Int16Array', 'Int32Array', 'Map', 'Math', 'Object',
  1501. 'Promise', 'RegExp', 'Set', 'String', 'Symbol', 'TypeError', 'Uint8Array',
  1502. 'Uint8ClampedArray', 'Uint16Array', 'Uint32Array', 'WeakMap',
  1503. '_', 'clearTimeout', 'isFinite', 'parseInt', 'setTimeout'
  1504. ];
  1505. /** Used to make template sourceURLs easier to identify. */
  1506. var templateCounter = -1;
  1507. /** Used to identify `toStringTag` values of typed arrays. */
  1508. var typedArrayTags = {};
  1509. typedArrayTags[float32Tag] = typedArrayTags[float64Tag] =
  1510. typedArrayTags[int8Tag] = typedArrayTags[int16Tag] =
  1511. typedArrayTags[int32Tag] = typedArrayTags[uint8Tag] =
  1512. typedArrayTags[uint8ClampedTag] = typedArrayTags[uint16Tag] =
  1513. typedArrayTags[uint32Tag] = true;
  1514. typedArrayTags[argsTag] = typedArrayTags[arrayTag] =
  1515. typedArrayTags[arrayBufferTag] = typedArrayTags[boolTag] =
  1516. typedArrayTags[dataViewTag] = typedArrayTags[dateTag] =
  1517. typedArrayTags[errorTag] = typedArrayTags[funcTag] =
  1518. typedArrayTags[mapTag] = typedArrayTags[numberTag] =
  1519. typedArrayTags[objectTag] = typedArrayTags[regexpTag] =
  1520. typedArrayTags[setTag] = typedArrayTags[stringTag] =
  1521. typedArrayTags[weakMapTag] = false;
  1522. /** Used to identify `toStringTag` values supported by `_.clone`. */
  1523. var cloneableTags = {};
  1524. cloneableTags[argsTag] = cloneableTags[arrayTag] =
  1525. cloneableTags[arrayBufferTag] = cloneableTags[dataViewTag] =
  1526. cloneableTags[boolTag] = cloneableTags[dateTag] =
  1527. cloneableTags[float32Tag] = cloneableTags[float64Tag] =
  1528. cloneableTags[int8Tag] = cloneableTags[int16Tag] =
  1529. cloneableTags[int32Tag] = cloneableTags[mapTag] =
  1530. cloneableTags[numberTag] = cloneableTags[objectTag] =
  1531. cloneableTags[regexpTag] = cloneableTags[setTag] =
  1532. cloneableTags[stringTag] = cloneableTags[symbolTag] =
  1533. cloneableTags[uint8Tag] = cloneableTags[uint8ClampedTag] =
  1534. cloneableTags[uint16Tag] = cloneableTags[uint32Tag] = true;
  1535. cloneableTags[errorTag] = cloneableTags[funcTag] =
  1536. cloneableTags[weakMapTag] = false;
  1537. /** Used to map Latin Unicode letters to basic Latin letters. */
  1538. var deburredLetters = {
  1539. // Latin-1 Supplement block.
  1540. '\xc0': 'A', '\xc1': 'A', '\xc2': 'A', '\xc3': 'A', '\xc4': 'A', '\xc5': 'A',
  1541. '\xe0': 'a', '\xe1': 'a', '\xe2': 'a', '\xe3': 'a', '\xe4': 'a', '\xe5': 'a',
  1542. '\xc7': 'C', '\xe7': 'c',
  1543. '\xd0': 'D', '\xf0': 'd',
  1544. '\xc8': 'E', '\xc9': 'E', '\xca': 'E', '\xcb': 'E',
  1545. '\xe8': 'e', '\xe9': 'e', '\xea': 'e', '\xeb': 'e',
  1546. '\xcc': 'I', '\xcd': 'I', '\xce': 'I', '\xcf': 'I',
  1547. '\xec': 'i', '\xed': 'i', '\xee': 'i', '\xef': 'i',
  1548. '\xd1': 'N', '\xf1': 'n',
  1549. '\xd2': 'O', '\xd3': 'O', '\xd4': 'O', '\xd5': 'O', '\xd6': 'O', '\xd8': 'O',
  1550. '\xf2': 'o', '\xf3': 'o', '\xf4': 'o', '\xf5': 'o', '\xf6': 'o', '\xf8': 'o',
  1551. '\xd9': 'U', '\xda': 'U', '\xdb': 'U', '\xdc': 'U',
  1552. '\xf9': 'u', '\xfa': 'u', '\xfb': 'u', '\xfc': 'u',
  1553. '\xdd': 'Y', '\xfd': 'y', '\xff': 'y',
  1554. '\xc6': 'Ae', '\xe6': 'ae',
  1555. '\xde': 'Th', '\xfe': 'th',
  1556. '\xdf': 'ss',
  1557. // Latin Extended-A block.
  1558. '\u0100': 'A', '\u0102': 'A', '\u0104': 'A',
  1559. '\u0101': 'a', '\u0103': 'a', '\u0105': 'a',
  1560. '\u0106': 'C', '\u0108': 'C', '\u010a': 'C', '\u010c': 'C',
  1561. '\u0107': 'c', '\u0109': 'c', '\u010b': 'c', '\u010d': 'c',
  1562. '\u010e': 'D', '\u0110': 'D', '\u010f': 'd', '\u0111': 'd',
  1563. '\u0112': 'E', '\u0114': 'E', '\u0116': 'E', '\u0118': 'E', '\u011a': 'E',
  1564. '\u0113': 'e', '\u0115': 'e', '\u0117': 'e', '\u0119': 'e', '\u011b': 'e',
  1565. '\u011c': 'G', '\u011e': 'G', '\u0120': 'G', '\u0122': 'G',
  1566. '\u011d': 'g', '\u011f': 'g', '\u0121': 'g', '\u0123': 'g',
  1567. '\u0124': 'H', '\u0126': 'H', '\u0125': 'h', '\u0127': 'h',
  1568. '\u0128': 'I', '\u012a': 'I', '\u012c': 'I', '\u012e': 'I', '\u0130': 'I',
  1569. '\u0129': 'i', '\u012b': 'i', '\u012d': 'i', '\u012f': 'i', '\u0131': 'i',
  1570. '\u0134': 'J', '\u0135': 'j',
  1571. '\u0136': 'K', '\u0137': 'k', '\u0138': 'k',
  1572. '\u0139': 'L', '\u013b': 'L', '\u013d': 'L', '\u013f': 'L', '\u0141': 'L',
  1573. '\u013a': 'l', '\u013c': 'l', '\u013e': 'l', '\u0140': 'l', '\u0142': 'l',
  1574. '\u0143': 'N', '\u0145': 'N', '\u0147': 'N', '\u014a': 'N',
  1575. '\u0144': 'n', '\u0146': 'n', '\u0148': 'n', '\u014b': 'n',
  1576. '\u014c': 'O', '\u014e': 'O', '\u0150': 'O',
  1577. '\u014d': 'o', '\u014f': 'o', '\u0151': 'o',
  1578. '\u0154': 'R', '\u0156': 'R', '\u0158': 'R',
  1579. '\u0155': 'r', '\u0157': 'r', '\u0159': 'r',
  1580. '\u015a': 'S', '\u015c': 'S', '\u015e': 'S', '\u0160': 'S',
  1581. '\u015b': 's', '\u015d': 's', '\u015f': 's', '\u0161': 's',
  1582. '\u0162': 'T', '\u0164': 'T', '\u0166': 'T',
  1583. '\u0163': 't', '\u0165': 't', '\u0167': 't',
  1584. '\u0168': 'U', '\u016a': 'U', '\u016c': 'U', '\u016e': 'U', '\u0170': 'U', '\u0172': 'U',
  1585. '\u0169': 'u', '\u016b': 'u', '\u016d': 'u', '\u016f': 'u', '\u0171': 'u', '\u0173': 'u',
  1586. '\u0174': 'W', '\u0175': 'w',
  1587. '\u0176': 'Y', '\u0177': 'y', '\u0178': 'Y',
  1588. '\u0179': 'Z', '\u017b': 'Z', '\u017d': 'Z',
  1589. '\u017a': 'z', '\u017c': 'z', '\u017e': 'z',
  1590. '\u0132': 'IJ', '\u0133': 'ij',
  1591. '\u0152': 'Oe', '\u0153': 'oe',
  1592. '\u0149': "'n", '\u017f': 's'
  1593. };
  1594. /** Used to map characters to HTML entities. */
  1595. var htmlEscapes = {
  1596. '&': '&amp;',
  1597. '<': '&lt;',
  1598. '>': '&gt;',
  1599. '"': '&quot;',
  1600. "'": '&#39;'
  1601. };
  1602. /** Used to map HTML entities to characters. */
  1603. var htmlUnescapes = {
  1604. '&amp;': '&',
  1605. '&lt;': '<',
  1606. '&gt;': '>',
  1607. '&quot;': '"',
  1608. '&#39;': "'"
  1609. };
  1610. /** Used to escape characters for inclusion in compiled string literals. */
  1611. var stringEscapes = {
  1612. '\\': '\\',
  1613. "'": "'",
  1614. '\n': 'n',
  1615. '\r': 'r',
  1616. '\u2028': 'u2028',
  1617. '\u2029': 'u2029'
  1618. };
  1619. /** Built-in method references without a dependency on `root`. */
  1620. var freeParseFloat = parseFloat,
  1621. freeParseInt = parseInt;
  1622. /** Detect free variable `global` from Node.js. */
  1623. var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;
  1624. /** Detect free variable `self`. */
  1625. var freeSelf = typeof self == 'object' && self && self.Object === Object && self;
  1626. /** Used as a reference to the global object. */
  1627. var root = freeGlobal || freeSelf || Function('return this')();
  1628. /** Detect free variable `exports`. */
  1629. var freeExports = typeof exports == 'object' && exports && !exports.nodeType && exports;
  1630. /** Detect free variable `module`. */
  1631. var freeModule = freeExports && typeof module == 'object' && module && !module.nodeType && module;
  1632. /** Detect the popular CommonJS extension `module.exports`. */
  1633. var moduleExports = freeModule && freeModule.exports === freeExports;
  1634. /** Detect free variable `process` from Node.js. */
  1635. var freeProcess = moduleExports && freeGlobal.process;
  1636. /** Used to access faster Node.js helpers. */
  1637. var nodeUtil = (function() {
  1638. try {
  1639. // Use `util.types` for Node.js 10+.
  1640. var types = freeModule && freeModule.require && freeModule.require('util').types;
  1641. if (types) {
  1642. return types;
  1643. }
  1644. // Legacy `process.binding('util')` for Node.js < 10.
  1645. return freeProcess && freeProcess.binding && freeProcess.binding('util');
  1646. } catch (e) {}
  1647. }());
  1648. /* Node.js helper references. */
  1649. var nodeIsArrayBuffer = nodeUtil && nodeUtil.isArrayBuffer,
  1650. nodeIsDate = nodeUtil && nodeUtil.isDate,
  1651. nodeIsMap = nodeUtil && nodeUtil.isMap,
  1652. nodeIsRegExp = nodeUtil && nodeUtil.isRegExp,
  1653. nodeIsSet = nodeUtil && nodeUtil.isSet,
  1654. nodeIsTypedArray = nodeUtil && nodeUtil.isTypedArray;
  1655. /*--------------------------------------------------------------------------*/
  1656. /**
  1657. * A faster alternative to `Function#apply`, this function invokes `func`
  1658. * with the `this` binding of `thisArg` and the arguments of `args`.
  1659. *
  1660. * @private
  1661. * @param {Function} func The function to invoke.
  1662. * @param {*} thisArg The `this` binding of `func`.
  1663. * @param {Array} args The arguments to invoke `func` with.
  1664. * @returns {*} Returns the result of `func`.
  1665. */
  1666. function apply(func, thisArg, args) {
  1667. switch (args.length) {
  1668. case 0: return func.call(thisArg);
  1669. case 1: return func.call(thisArg, args[0]);
  1670. case 2: return func.call(thisArg, args[0], args[1]);
  1671. case 3: return func.call(thisArg, args[0], args[1], args[2]);
  1672. }
  1673. return func.apply(thisArg, args);
  1674. }
  1675. /**
  1676. * A specialized version of `baseAggregator` for arrays.
  1677. *
  1678. * @private
  1679. * @param {Array} [array] The array to iterate over.
  1680. * @param {Function} setter The function to set `accumulator` values.
  1681. * @param {Function} iteratee The iteratee to transform keys.
  1682. * @param {Object} accumulator The initial aggregated object.
  1683. * @returns {Function} Returns `accumulator`.
  1684. */
  1685. function arrayAggregator(array, setter, iteratee, accumulator) {
  1686. var index = -1,
  1687. length = array == null ? 0 : array.length;
  1688. while (++index < length) {
  1689. var value = array[index];
  1690. setter(accumulator, value, iteratee(value), array);
  1691. }
  1692. return accumulator;
  1693. }
  1694. /**
  1695. * A specialized version of `_.forEach` for arrays without support for
  1696. * iteratee shorthands.
  1697. *
  1698. * @private
  1699. * @param {Array} [array] The array to iterate over.
  1700. * @param {Function} iteratee The function invoked per iteration.
  1701. * @returns {Array} Returns `array`.
  1702. */
  1703. function arrayEach(array, iteratee) {
  1704. var index = -1,
  1705. length = array == null ? 0 : array.length;
  1706. while (++index < length) {
  1707. if (iteratee(array[index], index, array) === false) {
  1708. break;
  1709. }
  1710. }
  1711. return array;
  1712. }
  1713. /**
  1714. * A specialized version of `_.forEachRight` for arrays without support for
  1715. * iteratee shorthands.
  1716. *
  1717. * @private
  1718. * @param {Array} [array] The array to iterate over.
  1719. * @param {Function} iteratee The function invoked per iteration.
  1720. * @returns {Array} Returns `array`.
  1721. */
  1722. function arrayEachRight(array, iteratee) {
  1723. var length = array == null ? 0 : array.length;
  1724. while (length--) {
  1725. if (iteratee(array[length], length, array) === false) {
  1726. break;
  1727. }
  1728. }
  1729. return array;
  1730. }
  1731. /**
  1732. * A specialized version of `_.every` for arrays without support for
  1733. * iteratee shorthands.
  1734. *
  1735. * @private
  1736. * @param {Array} [array] The array to iterate over.
  1737. * @param {Function} predicate The function invoked per iteration.
  1738. * @returns {boolean} Returns `true` if all elements pass the predicate check,
  1739. * else `false`.
  1740. */
  1741. function arrayEvery(array, predicate) {
  1742. var index = -1,
  1743. length = array == null ? 0 : array.length;
  1744. while (++index < length) {
  1745. if (!predicate(array[index], index, array)) {
  1746. return false;
  1747. }
  1748. }
  1749. return true;
  1750. }
  1751. /**
  1752. * A specialized version of `_.filter` for arrays without support for
  1753. * iteratee shorthands.
  1754. *
  1755. * @private
  1756. * @param {Array} [array] The array to iterate over.
  1757. * @param {Function} predicate The function invoked per iteration.
  1758. * @returns {Array} Returns the new filtered array.
  1759. */
  1760. function arrayFilter(array, predicate) {
  1761. var index = -1,
  1762. length = array == null ? 0 : array.length,
  1763. resIndex = 0,
  1764. result = [];
  1765. while (++index < length) {
  1766. var value = array[index];
  1767. if (predicate(value, index, array)) {
  1768. result[resIndex++] = value;
  1769. }
  1770. }
  1771. return result;
  1772. }
  1773. /**
  1774. * A specialized version of `_.includes` for arrays without support for
  1775. * specifying an index to search from.
  1776. *
  1777. * @private
  1778. * @param {Array} [array] The array to inspect.
  1779. * @param {*} target The value to search for.
  1780. * @returns {boolean} Returns `true` if `target` is found, else `false`.
  1781. */
  1782. function arrayIncludes(array, value) {
  1783. var length = array == null ? 0 : array.length;
  1784. return !!length && baseIndexOf(array, value, 0) > -1;
  1785. }
  1786. /**
  1787. * This function is like `arrayIncludes` except that it accepts a comparator.
  1788. *
  1789. * @private
  1790. * @param {Array} [array] The array to inspect.
  1791. * @param {*} target The value to search for.
  1792. * @param {Function} comparator The comparator invoked per element.
  1793. * @returns {boolean} Returns `true` if `target` is found, else `false`.
  1794. */
  1795. function arrayIncludesWith(array, value, comparator) {
  1796. var index = -1,
  1797. length = array == null ? 0 : array.length;
  1798. while (++index < length) {
  1799. if (comparator(value, array[index])) {
  1800. return true;
  1801. }
  1802. }
  1803. return false;
  1804. }
  1805. /**
  1806. * A specialized version of `_.map` for arrays without support for iteratee
  1807. * shorthands.
  1808. *
  1809. * @private
  1810. * @param {Array} [array] The array to iterate over.
  1811. * @param {Function} iteratee The function invoked per iteration.
  1812. * @returns {Array} Returns the new mapped array.
  1813. */
  1814. function arrayMap(array, iteratee) {
  1815. var index = -1,
  1816. length = array == null ? 0 : array.length,
  1817. result = Array(length);
  1818. while (++index < length) {
  1819. result[index] = iteratee(array[index], index, array);
  1820. }
  1821. return result;
  1822. }
  1823. /**
  1824. * Appends the elements of `values` to `array`.
  1825. *
  1826. * @private
  1827. * @param {Array} array The array to modify.
  1828. * @param {Array} values The values to append.
  1829. * @returns {Array} Returns `array`.
  1830. */
  1831. function arrayPush(array, values) {
  1832. var index = -1,
  1833. length = values.length,
  1834. offset = array.length;
  1835. while (++index < length) {
  1836. array[offset + index] = values[index];
  1837. }
  1838. return array;
  1839. }
  1840. /**
  1841. * A specialized version of `_.reduce` for arrays without support for
  1842. * iteratee shorthands.
  1843. *
  1844. * @private
  1845. * @param {Array} [array] The array to iterate over.
  1846. * @param {Function} iteratee The function invoked per iteration.
  1847. * @param {*} [accumulator] The initial value.
  1848. * @param {boolean} [initAccum] Specify using the first element of `array` as
  1849. * the initial value.
  1850. * @returns {*} Returns the accumulated value.
  1851. */
  1852. function arrayReduce(array, iteratee, accumulator, initAccum) {
  1853. var index = -1,
  1854. length = array == null ? 0 : array.length;
  1855. if (initAccum && length) {
  1856. accumulator = array[++index];
  1857. }
  1858. while (++index < length) {
  1859. accumulator = iteratee(accumulator, array[index], index, array);
  1860. }
  1861. return accumulator;
  1862. }
  1863. /**
  1864. * A specialized version of `_.reduceRight` for arrays without support for
  1865. * iteratee shorthands.
  1866. *
  1867. * @private
  1868. * @param {Array} [array] The array to iterate over.
  1869. * @param {Function} iteratee The function invoked per iteration.
  1870. * @param {*} [accumulator] The initial value.
  1871. * @param {boolean} [initAccum] Specify using the last element of `array` as
  1872. * the initial value.
  1873. * @returns {*} Returns the accumulated value.
  1874. */
  1875. function arrayReduceRight(array, iteratee, accumulator, initAccum) {
  1876. var length = array == null ? 0 : array.length;
  1877. if (initAccum && length) {
  1878. accumulator = array[--length];
  1879. }
  1880. while (length--) {
  1881. accumulator = iteratee(accumulator, array[length], length, array);
  1882. }
  1883. return accumulator;
  1884. }
  1885. /**
  1886. * A specialized version of `_.some` for arrays without support for iteratee
  1887. * shorthands.
  1888. *
  1889. * @private
  1890. * @param {Array} [array] The array to iterate over.
  1891. * @param {Function} predicate The function invoked per iteration.
  1892. * @returns {boolean} Returns `true` if any element passes the predicate check,
  1893. * else `false`.
  1894. */
  1895. function arraySome(array, predicate) {
  1896. var index = -1,
  1897. length = array == null ? 0 : array.length;
  1898. while (++index < length) {
  1899. if (predicate(array[index], index, array)) {
  1900. return true;
  1901. }
  1902. }
  1903. return false;
  1904. }
  1905. /**
  1906. * Gets the size of an ASCII `string`.
  1907. *
  1908. * @private
  1909. * @param {string} string The string inspect.
  1910. * @returns {number} Returns the string size.
  1911. */
  1912. var asciiSize = baseProperty('length');
  1913. /**
  1914. * Converts an ASCII `string` to an array.
  1915. *
  1916. * @private
  1917. * @param {string} string The string to convert.
  1918. * @returns {Array} Returns the converted array.
  1919. */
  1920. function asciiToArray(string) {
  1921. return string.split('');
  1922. }
  1923. /**
  1924. * Splits an ASCII `string` into an array of its words.
  1925. *
  1926. * @private
  1927. * @param {string} The string to inspect.
  1928. * @returns {Array} Returns the words of `string`.
  1929. */
  1930. function asciiWords(string) {
  1931. return string.match(reAsciiWord) || [];
  1932. }
  1933. /**
  1934. * The base implementation of methods like `_.findKey` and `_.findLastKey`,
  1935. * without support for iteratee shorthands, which iterates over `collection`
  1936. * using `eachFunc`.
  1937. *
  1938. * @private
  1939. * @param {Array|Object} collection The collection to inspect.
  1940. * @param {Function} predicate The function invoked per iteration.
  1941. * @param {Function} eachFunc The function to iterate over `collection`.
  1942. * @returns {*} Returns the found element or its key, else `undefined`.
  1943. */
  1944. function baseFindKey(collection, predicate, eachFunc) {
  1945. var result;
  1946. eachFunc(collection, function(value, key, collection) {
  1947. if (predicate(value, key, collection)) {
  1948. result = key;
  1949. return false;
  1950. }
  1951. });
  1952. return result;
  1953. }
  1954. /**
  1955. * The base implementation of `_.findIndex` and `_.findLastIndex` without
  1956. * support for iteratee shorthands.
  1957. *
  1958. * @private
  1959. * @param {Array} array The array to inspect.
  1960. * @param {Function} predicate The function invoked per iteration.
  1961. * @param {number} fromIndex The index to search from.
  1962. * @param {boolean} [fromRight] Specify iterating from right to left.
  1963. * @returns {number} Returns the index of the matched value, else `-1`.
  1964. */
  1965. function baseFindIndex(array, predicate, fromIndex, fromRight) {
  1966. var length = array.length,
  1967. index = fromIndex + (fromRight ? 1 : -1);
  1968. while ((fromRight ? index-- : ++index < length)) {
  1969. if (predicate(array[index], index, array)) {
  1970. return index;
  1971. }
  1972. }
  1973. return -1;
  1974. }
  1975. /**
  1976. * The base implementation of `_.indexOf` without `fromIndex` bounds checks.
  1977. *
  1978. * @private
  1979. * @param {Array} array The array to inspect.
  1980. * @param {*} value The value to search for.
  1981. * @param {number} fromIndex The index to search from.
  1982. * @returns {number} Returns the index of the matched value, else `-1`.
  1983. */
  1984. function baseIndexOf(array, value, fromIndex) {
  1985. return value === value
  1986. ? strictIndexOf(array, value, fromIndex)
  1987. : baseFindIndex(array, baseIsNaN, fromIndex);
  1988. }
  1989. /**
  1990. * This function is like `baseIndexOf` except that it accepts a comparator.
  1991. *
  1992. * @private
  1993. * @param {Array} array The array to inspect.
  1994. * @param {*} value The value to search for.
  1995. * @param {number} fromIndex The index to search from.
  1996. * @param {Function} comparator The comparator invoked per element.
  1997. * @returns {number} Returns the index of the matched value, else `-1`.
  1998. */
  1999. function baseIndexOfWith(array, value, fromIndex, comparator) {
  2000. var index = fromIndex - 1,
  2001. length = array.length;
  2002. while (++index < length) {
  2003. if (comparator(array[index], value)) {
  2004. return index;
  2005. }
  2006. }
  2007. return -1;
  2008. }
  2009. /**
  2010. * The base implementation of `_.isNaN` without support for number objects.
  2011. *
  2012. * @private
  2013. * @param {*} value The value to check.
  2014. * @returns {boolean} Returns `true` if `value` is `NaN`, else `false`.
  2015. */
  2016. function baseIsNaN(value) {
  2017. return value !== value;
  2018. }
  2019. /**
  2020. * The base implementation of `_.mean` and `_.meanBy` without support for
  2021. * iteratee shorthands.
  2022. *
  2023. * @private
  2024. * @param {Array} array The array to iterate over.
  2025. * @param {Function} iteratee The function invoked per iteration.
  2026. * @returns {number} Returns the mean.
  2027. */
  2028. function baseMean(array, iteratee) {
  2029. var length = array == null ? 0 : array.length;
  2030. return length ? (baseSum(array, iteratee) / length) : NAN;
  2031. }
  2032. /**
  2033. * The base implementation of `_.property` without support for deep paths.
  2034. *
  2035. * @private
  2036. * @param {string} key The key of the property to get.
  2037. * @returns {Function} Returns the new accessor function.
  2038. */
  2039. function baseProperty(key) {
  2040. return function(object) {
  2041. return object == null ? undefined : object[key];
  2042. };
  2043. }
  2044. /**
  2045. * The base implementation of `_.propertyOf` without support for deep paths.
  2046. *
  2047. * @private
  2048. * @param {Object} object The object to query.
  2049. * @returns {Function} Returns the new accessor function.
  2050. */
  2051. function basePropertyOf(object) {
  2052. return function(key) {
  2053. return object == null ? undefined : object[key];
  2054. };
  2055. }
  2056. /**
  2057. * The base implementation of `_.reduce` and `_.reduceRight`, without support
  2058. * for iteratee shorthands, which iterates over `collection` using `eachFunc`.
  2059. *
  2060. * @private
  2061. * @param {Array|Object} collection The collection to iterate over.
  2062. * @param {Function} iteratee The function invoked per iteration.
  2063. * @param {*} accumulator The initial value.
  2064. * @param {boolean} initAccum Specify using the first or last element of
  2065. * `collection` as the initial value.
  2066. * @param {Function} eachFunc The function to iterate over `collection`.
  2067. * @returns {*} Returns the accumulated value.
  2068. */
  2069. function baseReduce(collection, iteratee, accumulator, initAccum, eachFunc) {
  2070. eachFunc(collection, function(value, index, collection) {
  2071. accumulator = initAccum
  2072. ? (initAccum = false, value)
  2073. : iteratee(accumulator, value, index, collection);
  2074. });
  2075. return accumulator;
  2076. }
  2077. /**
  2078. * The base implementation of `_.sortBy` which uses `comparer` to define the
  2079. * sort order of `array` and replaces criteria objects with their corresponding
  2080. * values.
  2081. *
  2082. * @private
  2083. * @param {Array} array The array to sort.
  2084. * @param {Function} comparer The function to define sort order.
  2085. * @returns {Array} Returns `array`.
  2086. */
  2087. function baseSortBy(array, comparer) {
  2088. var length = array.length;
  2089. array.sort(comparer);
  2090. while (length--) {
  2091. array[length] = array[length].value;
  2092. }
  2093. return array;
  2094. }
  2095. /**
  2096. * The base implementation of `_.sum` and `_.sumBy` without support for
  2097. * iteratee shorthands.
  2098. *
  2099. * @private
  2100. * @param {Array} array The array to iterate over.
  2101. * @param {Function} iteratee The function invoked per iteration.
  2102. * @returns {number} Returns the sum.
  2103. */
  2104. function baseSum(array, iteratee) {
  2105. var result,
  2106. index = -1,
  2107. length = array.length;
  2108. while (++index < length) {
  2109. var current = iteratee(array[index]);
  2110. if (current !== undefined) {
  2111. result = result === undefined ? current : (result + current);
  2112. }
  2113. }
  2114. return result;
  2115. }
  2116. /**
  2117. * The base implementation of `_.times` without support for iteratee shorthands
  2118. * or max array length checks.
  2119. *
  2120. * @private
  2121. * @param {number} n The number of times to invoke `iteratee`.
  2122. * @param {Function} iteratee The function invoked per iteration.
  2123. * @returns {Array} Returns the array of results.
  2124. */
  2125. function baseTimes(n, iteratee) {
  2126. var index = -1,
  2127. result = Array(n);
  2128. while (++index < n) {
  2129. result[index] = iteratee(index);
  2130. }
  2131. return result;
  2132. }
  2133. /**
  2134. * The base implementation of `_.toPairs` and `_.toPairsIn` which creates an array
  2135. * of key-value pairs for `object` corresponding to the property names of `props`.
  2136. *
  2137. * @private
  2138. * @param {Object} object The object to query.
  2139. * @param {Array} props The property names to get values for.
  2140. * @returns {Object} Returns the key-value pairs.
  2141. */
  2142. function baseToPairs(object, props) {
  2143. return arrayMap(props, function(key) {
  2144. return [key, object[key]];
  2145. });
  2146. }
  2147. /**
  2148. * The base implementation of `_.unary` without support for storing metadata.
  2149. *
  2150. * @private
  2151. * @param {Function} func The function to cap arguments for.
  2152. * @returns {Function} Returns the new capped function.
  2153. */
  2154. function baseUnary(func) {
  2155. return function(value) {
  2156. return func(value);
  2157. };
  2158. }
  2159. /**
  2160. * The base implementation of `_.values` and `_.valuesIn` which creates an
  2161. * array of `object` property values corresponding to the property names
  2162. * of `props`.
  2163. *
  2164. * @private
  2165. * @param {Object} object The object to query.
  2166. * @param {Array} props The property names to get values for.
  2167. * @returns {Object} Returns the array of property values.
  2168. */
  2169. function baseValues(object, props) {
  2170. return arrayMap(props, function(key) {
  2171. return object[key];
  2172. });
  2173. }
  2174. /**
  2175. * Checks if a `cache` value for `key` exists.
  2176. *
  2177. * @private
  2178. * @param {Object} cache The cache to query.
  2179. * @param {string} key The key of the entry to check.
  2180. * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
  2181. */
  2182. function cacheHas(cache, key) {
  2183. return cache.has(key);
  2184. }
  2185. /**
  2186. * Used by `_.trim` and `_.trimStart` to get the index of the first string symbol
  2187. * that is not found in the character symbols.
  2188. *
  2189. * @private
  2190. * @param {Array} strSymbols The string symbols to inspect.
  2191. * @param {Array} chrSymbols The character symbols to find.
  2192. * @returns {number} Returns the index of the first unmatched string symbol.
  2193. */
  2194. function charsStartIndex(strSymbols, chrSymbols) {
  2195. var index = -1,
  2196. length = strSymbols.length;
  2197. while (++index < length && baseIndexOf(chrSymbols, strSymbols[index], 0) > -1) {}
  2198. return index;
  2199. }
  2200. /**
  2201. * Used by `_.trim` and `_.trimEnd` to get the index of the last string symbol
  2202. * that is not found in the character symbols.
  2203. *
  2204. * @private
  2205. * @param {Array} strSymbols The string symbols to inspect.
  2206. * @param {Array} chrSymbols The character symbols to find.
  2207. * @returns {number} Returns the index of the last unmatched string symbol.
  2208. */
  2209. function charsEndIndex(strSymbols, chrSymbols) {
  2210. var index = strSymbols.length;
  2211. while (index-- && baseIndexOf(chrSymbols, strSymbols[index], 0) > -1) {}
  2212. return index;
  2213. }
  2214. /**
  2215. * Gets the number of `placeholder` occurrences in `array`.
  2216. *
  2217. * @private
  2218. * @param {Array} array The array to inspect.
  2219. * @param {*} placeholder The placeholder to search for.
  2220. * @returns {number} Returns the placeholder count.
  2221. */
  2222. function countHolders(array, placeholder) {
  2223. var length = array.length,
  2224. result = 0;
  2225. while (length--) {
  2226. if (array[length] === placeholder) {
  2227. ++result;
  2228. }
  2229. }
  2230. return result;
  2231. }
  2232. /**
  2233. * Used by `_.deburr` to convert Latin-1 Supplement and Latin Extended-A
  2234. * letters to basic Latin letters.
  2235. *
  2236. * @private
  2237. * @param {string} letter The matched letter to deburr.
  2238. * @returns {string} Returns the deburred letter.
  2239. */
  2240. var deburrLetter = basePropertyOf(deburredLetters);
  2241. /**
  2242. * Used by `_.escape` to convert characters to HTML entities.
  2243. *
  2244. * @private
  2245. * @param {string} chr The matched character to escape.
  2246. * @returns {string} Returns the escaped character.
  2247. */
  2248. var escapeHtmlChar = basePropertyOf(htmlEscapes);
  2249. /**
  2250. * Used by `_.template` to escape characters for inclusion in compiled string literals.
  2251. *
  2252. * @private
  2253. * @param {string} chr The matched character to escape.
  2254. * @returns {string} Returns the escaped character.
  2255. */
  2256. function escapeStringChar(chr) {
  2257. return '\\' + stringEscapes[chr];
  2258. }
  2259. /**
  2260. * Gets the value at `key` of `object`.
  2261. *
  2262. * @private
  2263. * @param {Object} [object] The object to query.
  2264. * @param {string} key The key of the property to get.
  2265. * @returns {*} Returns the property value.
  2266. */
  2267. function getValue(object, key) {
  2268. return object == null ? undefined : object[key];
  2269. }
  2270. /**
  2271. * Checks if `string` contains Unicode symbols.
  2272. *
  2273. * @private
  2274. * @param {string} string The string to inspect.
  2275. * @returns {boolean} Returns `true` if a symbol is found, else `false`.
  2276. */
  2277. function hasUnicode(string) {
  2278. return reHasUnicode.test(string);
  2279. }
  2280. /**
  2281. * Checks if `string` contains a word composed of Unicode symbols.
  2282. *
  2283. * @private
  2284. * @param {string} string The string to inspect.
  2285. * @returns {boolean} Returns `true` if a word is found, else `false`.
  2286. */
  2287. function hasUnicodeWord(string) {
  2288. return reHasUnicodeWord.test(string);
  2289. }
  2290. /**
  2291. * Converts `iterator` to an array.
  2292. *
  2293. * @private
  2294. * @param {Object} iterator The iterator to convert.
  2295. * @returns {Array} Returns the converted array.
  2296. */
  2297. function iteratorToArray(iterator) {
  2298. var data,
  2299. result = [];
  2300. while (!(data = iterator.next()).done) {
  2301. result.push(data.value);
  2302. }
  2303. return result;
  2304. }
  2305. /**
  2306. * Converts `map` to its key-value pairs.
  2307. *
  2308. * @private
  2309. * @param {Object} map The map to convert.
  2310. * @returns {Array} Returns the key-value pairs.
  2311. */
  2312. function mapToArray(map) {
  2313. var index = -1,
  2314. result = Array(map.size);
  2315. map.forEach(function(value, key) {
  2316. result[++index] = [key, value];
  2317. });
  2318. return result;
  2319. }
  2320. /**
  2321. * Creates a unary function that invokes `func` with its argument transformed.
  2322. *
  2323. * @private
  2324. * @param {Function} func The function to wrap.
  2325. * @param {Function} transform The argument transform.
  2326. * @returns {Function} Returns the new function.
  2327. */
  2328. function overArg(func, transform) {
  2329. return function(arg) {
  2330. return func(transform(arg));
  2331. };
  2332. }
  2333. /**
  2334. * Replaces all `placeholder` elements in `array` with an internal placeholder
  2335. * and returns an array of their indexes.
  2336. *
  2337. * @private
  2338. * @param {Array} array The array to modify.
  2339. * @param {*} placeholder The placeholder to replace.
  2340. * @returns {Array} Returns the new array of placeholder indexes.
  2341. */
  2342. function replaceHolders(array, placeholder) {
  2343. var index = -1,
  2344. length = array.length,
  2345. resIndex = 0,
  2346. result = [];
  2347. while (++index < length) {
  2348. var value = array[index];
  2349. if (value === placeholder || value === PLACEHOLDER) {
  2350. array[index] = PLACEHOLDER;
  2351. result[resIndex++] = index;
  2352. }
  2353. }
  2354. return result;
  2355. }
  2356. /**
  2357. * Gets the value at `key`, unless `key` is "__proto__".
  2358. *
  2359. * @private
  2360. * @param {Object} object The object to query.
  2361. * @param {string} key The key of the property to get.
  2362. * @returns {*} Returns the property value.
  2363. */
  2364. function safeGet(object, key) {
  2365. return key == '__proto__'
  2366. ? undefined
  2367. : object[key];
  2368. }
  2369. /**
  2370. * Converts `set` to an array of its values.
  2371. *
  2372. * @private
  2373. * @param {Object} set The set to convert.
  2374. * @returns {Array} Returns the values.
  2375. */
  2376. function setToArray(set) {
  2377. var index = -1,
  2378. result = Array(set.size);
  2379. set.forEach(function(value) {
  2380. result[++index] = value;
  2381. });
  2382. return result;
  2383. }
  2384. /**
  2385. * Converts `set` to its value-value pairs.
  2386. *
  2387. * @private
  2388. * @param {Object} set The set to convert.
  2389. * @returns {Array} Returns the value-value pairs.
  2390. */
  2391. function setToPairs(set) {
  2392. var index = -1,
  2393. result = Array(set.size);
  2394. set.forEach(function(value) {
  2395. result[++index] = [value, value];
  2396. });
  2397. return result;
  2398. }
  2399. /**
  2400. * A specialized version of `_.indexOf` which performs strict equality
  2401. * comparisons of values, i.e. `===`.
  2402. *
  2403. * @private
  2404. * @param {Array} array The array to inspect.
  2405. * @param {*} value The value to search for.
  2406. * @param {number} fromIndex The index to search from.
  2407. * @returns {number} Returns the index of the matched value, else `-1`.
  2408. */
  2409. function strictIndexOf(array, value, fromIndex) {
  2410. var index = fromIndex - 1,
  2411. length = array.length;
  2412. while (++index < length) {
  2413. if (array[index] === value) {
  2414. return index;
  2415. }
  2416. }
  2417. return -1;
  2418. }
  2419. /**
  2420. * A specialized version of `_.lastIndexOf` which performs strict equality
  2421. * comparisons of values, i.e. `===`.
  2422. *
  2423. * @private
  2424. * @param {Array} array The array to inspect.
  2425. * @param {*} value The value to search for.
  2426. * @param {number} fromIndex The index to search from.
  2427. * @returns {number} Returns the index of the matched value, else `-1`.
  2428. */
  2429. function strictLastIndexOf(array, value, fromIndex) {
  2430. var index = fromIndex + 1;
  2431. while (index--) {
  2432. if (array[index] === value) {
  2433. return index;
  2434. }
  2435. }
  2436. return index;
  2437. }
  2438. /**
  2439. * Gets the number of symbols in `string`.
  2440. *
  2441. * @private
  2442. * @param {string} string The string to inspect.
  2443. * @returns {number} Returns the string size.
  2444. */
  2445. function stringSize(string) {
  2446. return hasUnicode(string)
  2447. ? unicodeSize(string)
  2448. : asciiSize(string);
  2449. }
  2450. /**
  2451. * Converts `string` to an array.
  2452. *
  2453. * @private
  2454. * @param {string} string The string to convert.
  2455. * @returns {Array} Returns the converted array.
  2456. */
  2457. function stringToArray(string) {
  2458. return hasUnicode(string)
  2459. ? unicodeToArray(string)
  2460. : asciiToArray(string);
  2461. }
  2462. /**
  2463. * Used by `_.unescape` to convert HTML entities to characters.
  2464. *
  2465. * @private
  2466. * @param {string} chr The matched character to unescape.
  2467. * @returns {string} Returns the unescaped character.
  2468. */
  2469. var unescapeHtmlChar = basePropertyOf(htmlUnescapes);
  2470. /**
  2471. * Gets the size of a Unicode `string`.
  2472. *
  2473. * @private
  2474. * @param {string} string The string inspect.
  2475. * @returns {number} Returns the string size.
  2476. */
  2477. function unicodeSize(string) {
  2478. var result = reUnicode.lastIndex = 0;
  2479. while (reUnicode.test(string)) {
  2480. ++result;
  2481. }
  2482. return result;
  2483. }
  2484. /**
  2485. * Converts a Unicode `string` to an array.
  2486. *
  2487. * @private
  2488. * @param {string} string The string to convert.
  2489. * @returns {Array} Returns the converted array.
  2490. */
  2491. function unicodeToArray(string) {
  2492. return string.match(reUnicode) || [];
  2493. }
  2494. /**
  2495. * Splits a Unicode `string` into an array of its words.
  2496. *
  2497. * @private
  2498. * @param {string} The string to inspect.
  2499. * @returns {Array} Returns the words of `string`.
  2500. */
  2501. function unicodeWords(string) {
  2502. return string.match(reUnicodeWord) || [];
  2503. }
  2504. /*--------------------------------------------------------------------------*/
  2505. /**
  2506. * Create a new pristine `lodash` function using the `context` object.
  2507. *
  2508. * @static
  2509. * @memberOf _
  2510. * @since 1.1.0
  2511. * @category Util
  2512. * @param {Object} [context=root] The context object.
  2513. * @returns {Function} Returns a new `lodash` function.
  2514. * @example
  2515. *
  2516. * _.mixin({ 'foo': _.constant('foo') });
  2517. *
  2518. * var lodash = _.runInContext();
  2519. * lodash.mixin({ 'bar': lodash.constant('bar') });
  2520. *
  2521. * _.isFunction(_.foo);
  2522. * // => true
  2523. * _.isFunction(_.bar);
  2524. * // => false
  2525. *
  2526. * lodash.isFunction(lodash.foo);
  2527. * // => false
  2528. * lodash.isFunction(lodash.bar);
  2529. * // => true
  2530. *
  2531. * // Create a suped-up `defer` in Node.js.
  2532. * var defer = _.runInContext({ 'setTimeout': setImmediate }).defer;
  2533. */
  2534. var runInContext = (function runInContext(context) {
  2535. context = context == null ? root : _.defaults(root.Object(), context, _.pick(root, contextProps));
  2536. /** Built-in constructor references. */
  2537. var Array = context.Array,
  2538. Date = context.Date,
  2539. Error = context.Error,
  2540. Function = context.Function,
  2541. Math = context.Math,
  2542. Object = context.Object,
  2543. RegExp = context.RegExp,
  2544. String = context.String,
  2545. TypeError = context.TypeError;
  2546. /** Used for built-in method references. */
  2547. var arrayProto = Array.prototype,
  2548. funcProto = Function.prototype,
  2549. objectProto = Object.prototype;
  2550. /** Used to detect overreaching core-js shims. */
  2551. var coreJsData = context['__core-js_shared__'];
  2552. /** Used to resolve the decompiled source of functions. */
  2553. var funcToString = funcProto.toString;
  2554. /** Used to check objects for own properties. */
  2555. var hasOwnProperty = objectProto.hasOwnProperty;
  2556. /** Used to generate unique IDs. */
  2557. var idCounter = 0;
  2558. /** Used to detect methods masquerading as native. */
  2559. var maskSrcKey = (function() {
  2560. var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');
  2561. return uid ? ('Symbol(src)_1.' + uid) : '';
  2562. }());
  2563. /**
  2564. * Used to resolve the
  2565. * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
  2566. * of values.
  2567. */
  2568. var nativeObjectToString = objectProto.toString;
  2569. /** Used to infer the `Object` constructor. */
  2570. var objectCtorString = funcToString.call(Object);
  2571. /** Used to restore the original `_` reference in `_.noConflict`. */
  2572. var oldDash = root._;
  2573. /** Used to detect if a method is native. */
  2574. var reIsNative = RegExp('^' +
  2575. funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&')
  2576. .replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
  2577. );
  2578. /** Built-in value references. */
  2579. var Buffer = moduleExports ? context.Buffer : undefined,
  2580. Symbol = context.Symbol,
  2581. Uint8Array = context.Uint8Array,
  2582. allocUnsafe = Buffer ? Buffer.allocUnsafe : undefined,
  2583. getPrototype = overArg(Object.getPrototypeOf, Object),
  2584. objectCreate = Object.create,
  2585. propertyIsEnumerable = objectProto.propertyIsEnumerable,
  2586. splice = arrayProto.splice,
  2587. spreadableSymbol = Symbol ? Symbol.isConcatSpreadable : undefined,
  2588. symIterator = Symbol ? Symbol.iterator : undefined,
  2589. symToStringTag = Symbol ? Symbol.toStringTag : undefined;
  2590. var defineProperty = (function() {
  2591. try {
  2592. var func = getNative(Object, 'defineProperty');
  2593. func({}, '', {});
  2594. return func;
  2595. } catch (e) {}
  2596. }());
  2597. /** Mocked built-ins. */
  2598. var ctxClearTimeout = context.clearTimeout !== root.clearTimeout && context.clearTimeout,
  2599. ctxNow = Date && Date.now !== root.Date.now && Date.now,
  2600. ctxSetTimeout = context.setTimeout !== root.setTimeout && context.setTimeout;
  2601. /* Built-in method references for those with the same name as other `lodash` methods. */
  2602. var nativeCeil = Math.ceil,
  2603. nativeFloor = Math.floor,
  2604. nativeGetSymbols = Object.getOwnPropertySymbols,
  2605. nativeIsBuffer = Buffer ? Buffer.isBuffer : undefined,
  2606. nativeIsFinite = context.isFinite,
  2607. nativeJoin = arrayProto.join,
  2608. nativeKeys = overArg(Object.keys, Object),
  2609. nativeMax = Math.max,
  2610. nativeMin = Math.min,
  2611. nativeNow = Date.now,
  2612. nativeParseInt = context.parseInt,
  2613. nativeRandom = Math.random,
  2614. nativeReverse = arrayProto.reverse;
  2615. /* Built-in method references that are verified to be native. */
  2616. var DataView = getNative(context, 'DataView'),
  2617. Map = getNative(context, 'Map'),
  2618. Promise = getNative(context, 'Promise'),
  2619. Set = getNative(context, 'Set'),
  2620. WeakMap = getNative(context, 'WeakMap'),
  2621. nativeCreate = getNative(Object, 'create');
  2622. /** Used to store function metadata. */
  2623. var metaMap = WeakMap && new WeakMap;
  2624. /** Used to lookup unminified function names. */
  2625. var realNames = {};
  2626. /** Used to detect maps, sets, and weakmaps. */
  2627. var dataViewCtorString = toSource(DataView),
  2628. mapCtorString = toSource(Map),
  2629. promiseCtorString = toSource(Promise),
  2630. setCtorString = toSource(Set),
  2631. weakMapCtorString = toSource(WeakMap);
  2632. /** Used to convert symbols to primitives and strings. */
  2633. var symbolProto = Symbol ? Symbol.prototype : undefined,
  2634. symbolValueOf = symbolProto ? symbolProto.valueOf : undefined,
  2635. symbolToString = symbolProto ? symbolProto.toString : undefined;
  2636. /*------------------------------------------------------------------------*/
  2637. /**
  2638. * Creates a `lodash` object which wraps `value` to enable implicit method
  2639. * chain sequences. Methods that operate on and return arrays, collections,
  2640. * and functions can be chained together. Methods that retrieve a single value
  2641. * or may return a primitive value will automatically end the chain sequence
  2642. * and return the unwrapped value. Otherwise, the value must be unwrapped
  2643. * with `_#value`.
  2644. *
  2645. * Explicit chain sequences, which must be unwrapped with `_#value`, may be
  2646. * enabled using `_.chain`.
  2647. *
  2648. * The execution of chained methods is lazy, that is, it's deferred until
  2649. * `_#value` is implicitly or explicitly called.
  2650. *
  2651. * Lazy evaluation allows several methods to support shortcut fusion.
  2652. * Shortcut fusion is an optimization to merge iteratee calls; this avoids
  2653. * the creation of intermediate arrays and can greatly reduce the number of
  2654. * iteratee executions. Sections of a chain sequence qualify for shortcut
  2655. * fusion if the section is applied to an array and iteratees accept only
  2656. * one argument. The heuristic for whether a section qualifies for shortcut
  2657. * fusion is subject to change.
  2658. *
  2659. * Chaining is supported in custom builds as long as the `_#value` method is
  2660. * directly or indirectly included in the build.
  2661. *
  2662. * In addition to lodash methods, wrappers have `Array` and `String` methods.
  2663. *
  2664. * The wrapper `Array` methods are:
  2665. * `concat`, `join`, `pop`, `push`, `shift`, `sort`, `splice`, and `unshift`
  2666. *
  2667. * The wrapper `String` methods are:
  2668. * `replace` and `split`
  2669. *
  2670. * The wrapper methods that support shortcut fusion are:
  2671. * `at`, `compact`, `drop`, `dropRight`, `dropWhile`, `filter`, `find`,
  2672. * `findLast`, `head`, `initial`, `last`, `map`, `reject`, `reverse`, `slice`,
  2673. * `tail`, `take`, `takeRight`, `takeRightWhile`, `takeWhile`, and `toArray`
  2674. *
  2675. * The chainable wrapper methods are:
  2676. * `after`, `ary`, `assign`, `assignIn`, `assignInWith`, `assignWith`, `at`,
  2677. * `before`, `bind`, `bindAll`, `bindKey`, `castArray`, `chain`, `chunk`,
  2678. * `commit`, `compact`, `concat`, `conforms`, `constant`, `countBy`, `create`,
  2679. * `curry`, `debounce`, `defaults`, `defaultsDeep`, `defer`, `delay`,
  2680. * `difference`, `differenceBy`, `differenceWith`, `drop`, `dropRight`,
  2681. * `dropRightWhile`, `dropWhile`, `extend`, `extendWith`, `fill`, `filter`,
  2682. * `flatMap`, `flatMapDeep`, `flatMapDepth`, `flatten`, `flattenDeep`,
  2683. * `flattenDepth`, `flip`, `flow`, `flowRight`, `fromPairs`, `functions`,
  2684. * `functionsIn`, `groupBy`, `initial`, `intersection`, `intersectionBy`,
  2685. * `intersectionWith`, `invert`, `invertBy`, `invokeMap`, `iteratee`, `keyBy`,
  2686. * `keys`, `keysIn`, `map`, `mapKeys`, `mapValues`, `matches`, `matchesProperty`,
  2687. * `memoize`, `merge`, `mergeWith`, `method`, `methodOf`, `mixin`, `negate`,
  2688. * `nthArg`, `omit`, `omitBy`, `once`, `orderBy`, `over`, `overArgs`,
  2689. * `overEvery`, `overSome`, `partial`, `partialRight`, `partition`, `pick`,
  2690. * `pickBy`, `plant`, `property`, `propertyOf`, `pull`, `pullAll`, `pullAllBy`,
  2691. * `pullAllWith`, `pullAt`, `push`, `range`, `rangeRight`, `rearg`, `reject`,
  2692. * `remove`, `rest`, `reverse`, `sampleSize`, `set`, `setWith`, `shuffle`,
  2693. * `slice`, `sort`, `sortBy`, `splice`, `spread`, `tail`, `take`, `takeRight`,
  2694. * `takeRightWhile`, `takeWhile`, `tap`, `throttle`, `thru`, `toArray`,
  2695. * `toPairs`, `toPairsIn`, `toPath`, `toPlainObject`, `transform`, `unary`,
  2696. * `union`, `unionBy`, `unionWith`, `uniq`, `uniqBy`, `uniqWith`, `unset`,
  2697. * `unshift`, `unzip`, `unzipWith`, `update`, `updateWith`, `values`,
  2698. * `valuesIn`, `without`, `wrap`, `xor`, `xorBy`, `xorWith`, `zip`,
  2699. * `zipObject`, `zipObjectDeep`, and `zipWith`
  2700. *
  2701. * The wrapper methods that are **not** chainable by default are:
  2702. * `add`, `attempt`, `camelCase`, `capitalize`, `ceil`, `clamp`, `clone`,
  2703. * `cloneDeep`, `cloneDeepWith`, `cloneWith`, `conformsTo`, `deburr`,
  2704. * `defaultTo`, `divide`, `each`, `eachRight`, `endsWith`, `eq`, `escape`,
  2705. * `escapeRegExp`, `every`, `find`, `findIndex`, `findKey`, `findLast`,
  2706. * `findLastIndex`, `findLastKey`, `first`, `floor`, `forEach`, `forEachRight`,
  2707. * `forIn`, `forInRight`, `forOwn`, `forOwnRight`, `get`, `gt`, `gte`, `has`,
  2708. * `hasIn`, `head`, `identity`, `includes`, `indexOf`, `inRange`, `invoke`,
  2709. * `isArguments`, `isArray`, `isArrayBuffer`, `isArrayLike`, `isArrayLikeObject`,
  2710. * `isBoolean`, `isBuffer`, `isDate`, `isElement`, `isEmpty`, `isEqual`,
  2711. * `isEqualWith`, `isError`, `isFinite`, `isFunction`, `isInteger`, `isLength`,
  2712. * `isMap`, `isMatch`, `isMatchWith`, `isNaN`, `isNative`, `isNil`, `isNull`,
  2713. * `isNumber`, `isObject`, `isObjectLike`, `isPlainObject`, `isRegExp`,
  2714. * `isSafeInteger`, `isSet`, `isString`, `isUndefined`, `isTypedArray`,
  2715. * `isWeakMap`, `isWeakSet`, `join`, `kebabCase`, `last`, `lastIndexOf`,
  2716. * `lowerCase`, `lowerFirst`, `lt`, `lte`, `max`, `maxBy`, `mean`, `meanBy`,
  2717. * `min`, `minBy`, `multiply`, `noConflict`, `noop`, `now`, `nth`, `pad`,
  2718. * `padEnd`, `padStart`, `parseInt`, `pop`, `random`, `reduce`, `reduceRight`,
  2719. * `repeat`, `result`, `round`, `runInContext`, `sample`, `shift`, `size`,
  2720. * `snakeCase`, `some`, `sortedIndex`, `sortedIndexBy`, `sortedLastIndex`,
  2721. * `sortedLastIndexBy`, `startCase`, `startsWith`, `stubArray`, `stubFalse`,
  2722. * `stubObject`, `stubString`, `stubTrue`, `subtract`, `sum`, `sumBy`,
  2723. * `template`, `times`, `toFinite`, `toInteger`, `toJSON`, `toLength`,
  2724. * `toLower`, `toNumber`, `toSafeInteger`, `toString`, `toUpper`, `trim`,
  2725. * `trimEnd`, `trimStart`, `truncate`, `unescape`, `uniqueId`, `upperCase`,
  2726. * `upperFirst`, `value`, and `words`
  2727. *
  2728. * @name _
  2729. * @constructor
  2730. * @category Seq
  2731. * @param {*} value The value to wrap in a `lodash` instance.
  2732. * @returns {Object} Returns the new `lodash` wrapper instance.
  2733. * @example
  2734. *
  2735. * function square(n) {
  2736. * return n * n;
  2737. * }
  2738. *
  2739. * var wrapped = _([1, 2, 3]);
  2740. *
  2741. * // Returns an unwrapped value.
  2742. * wrapped.reduce(_.add);
  2743. * // => 6
  2744. *
  2745. * // Returns a wrapped value.
  2746. * var squares = wrapped.map(square);
  2747. *
  2748. * _.isArray(squares);
  2749. * // => false
  2750. *
  2751. * _.isArray(squares.value());
  2752. * // => true
  2753. */
  2754. function lodash(value) {
  2755. if (isObjectLike(value) && !isArray(value) && !(value instanceof LazyWrapper)) {
  2756. if (value instanceof LodashWrapper) {
  2757. return value;
  2758. }
  2759. if (hasOwnProperty.call(value, '__wrapped__')) {
  2760. return wrapperClone(value);
  2761. }
  2762. }
  2763. return new LodashWrapper(value);
  2764. }
  2765. /**
  2766. * The base implementation of `_.create` without support for assigning
  2767. * properties to the created object.
  2768. *
  2769. * @private
  2770. * @param {Object} proto The object to inherit from.
  2771. * @returns {Object} Returns the new object.
  2772. */
  2773. var baseCreate = (function() {
  2774. function object() {}
  2775. return function(proto) {
  2776. if (!isObject(proto)) {
  2777. return {};
  2778. }
  2779. if (objectCreate) {
  2780. return objectCreate(proto);
  2781. }
  2782. object.prototype = proto;
  2783. var result = new object;
  2784. object.prototype = undefined;
  2785. return result;
  2786. };
  2787. }());
  2788. /**
  2789. * The function whose prototype chain sequence wrappers inherit from.
  2790. *
  2791. * @private
  2792. */
  2793. function baseLodash() {
  2794. // No operation performed.
  2795. }
  2796. /**
  2797. * The base constructor for creating `lodash` wrapper objects.
  2798. *
  2799. * @private
  2800. * @param {*} value The value to wrap.
  2801. * @param {boolean} [chainAll] Enable explicit method chain sequences.
  2802. */
  2803. function LodashWrapper(value, chainAll) {
  2804. this.__wrapped__ = value;
  2805. this.__actions__ = [];
  2806. this.__chain__ = !!chainAll;
  2807. this.__index__ = 0;
  2808. this.__values__ = undefined;
  2809. }
  2810. /**
  2811. * By default, the template delimiters used by lodash are like those in
  2812. * embedded Ruby (ERB) as well as ES2015 template strings. Change the
  2813. * following template settings to use alternative delimiters.
  2814. *
  2815. * @static
  2816. * @memberOf _
  2817. * @type {Object}
  2818. */
  2819. lodash.templateSettings = {
  2820. /**
  2821. * Used to detect `data` property values to be HTML-escaped.
  2822. *
  2823. * @memberOf _.templateSettings
  2824. * @type {RegExp}
  2825. */
  2826. 'escape': reEscape,
  2827. /**
  2828. * Used to detect code to be evaluated.
  2829. *
  2830. * @memberOf _.templateSettings
  2831. * @type {RegExp}
  2832. */
  2833. 'evaluate': reEvaluate,
  2834. /**
  2835. * Used to detect `data` property values to inject.
  2836. *
  2837. * @memberOf _.templateSettings
  2838. * @type {RegExp}
  2839. */
  2840. 'interpolate': reInterpolate,
  2841. /**
  2842. * Used to reference the data object in the template text.
  2843. *
  2844. * @memberOf _.templateSettings
  2845. * @type {string}
  2846. */
  2847. 'variable': '',
  2848. /**
  2849. * Used to import variables into the compiled template.
  2850. *
  2851. * @memberOf _.templateSettings
  2852. * @type {Object}
  2853. */
  2854. 'imports': {
  2855. /**
  2856. * A reference to the `lodash` function.
  2857. *
  2858. * @memberOf _.templateSettings.imports
  2859. * @type {Function}
  2860. */
  2861. '_': lodash
  2862. }
  2863. };
  2864. // Ensure wrappers are instances of `baseLodash`.
  2865. lodash.prototype = baseLodash.prototype;
  2866. lodash.prototype.constructor = lodash;
  2867. LodashWrapper.prototype = baseCreate(baseLodash.prototype);
  2868. LodashWrapper.prototype.constructor = LodashWrapper;
  2869. /*------------------------------------------------------------------------*/
  2870. /**
  2871. * Creates a lazy wrapper object which wraps `value` to enable lazy evaluation.
  2872. *
  2873. * @private
  2874. * @constructor
  2875. * @param {*} value The value to wrap.
  2876. */
  2877. function LazyWrapper(value) {
  2878. this.__wrapped__ = value;
  2879. this.__actions__ = [];
  2880. this.__dir__ = 1;
  2881. this.__filtered__ = false;
  2882. this.__iteratees__ = [];
  2883. this.__takeCount__ = MAX_ARRAY_LENGTH;
  2884. this.__views__ = [];
  2885. }
  2886. /**
  2887. * Creates a clone of the lazy wrapper object.
  2888. *
  2889. * @private
  2890. * @name clone
  2891. * @memberOf LazyWrapper
  2892. * @returns {Object} Returns the cloned `LazyWrapper` object.
  2893. */
  2894. function lazyClone() {
  2895. var result = new LazyWrapper(this.__wrapped__);
  2896. result.__actions__ = copyArray(this.__actions__);
  2897. result.__dir__ = this.__dir__;
  2898. result.__filtered__ = this.__filtered__;
  2899. result.__iteratees__ = copyArray(this.__iteratees__);
  2900. result.__takeCount__ = this.__takeCount__;
  2901. result.__views__ = copyArray(this.__views__);
  2902. return result;
  2903. }
  2904. /**
  2905. * Reverses the direction of lazy iteration.
  2906. *
  2907. * @private
  2908. * @name reverse
  2909. * @memberOf LazyWrapper
  2910. * @returns {Object} Returns the new reversed `LazyWrapper` object.
  2911. */
  2912. function lazyReverse() {
  2913. if (this.__filtered__) {
  2914. var result = new LazyWrapper(this);
  2915. result.__dir__ = -1;
  2916. result.__filtered__ = true;
  2917. } else {
  2918. result = this.clone();
  2919. result.__dir__ *= -1;
  2920. }
  2921. return result;
  2922. }
  2923. /**
  2924. * Extracts the unwrapped value from its lazy wrapper.
  2925. *
  2926. * @private
  2927. * @name value
  2928. * @memberOf LazyWrapper
  2929. * @returns {*} Returns the unwrapped value.
  2930. */
  2931. function lazyValue() {
  2932. var array = this.__wrapped__.value(),
  2933. dir = this.__dir__,
  2934. isArr = isArray(array),
  2935. isRight = dir < 0,
  2936. arrLength = isArr ? array.length : 0,
  2937. view = getView(0, arrLength, this.__views__),
  2938. start = view.start,
  2939. end = view.end,
  2940. length = end - start,
  2941. index = isRight ? end : (start - 1),
  2942. iteratees = this.__iteratees__,
  2943. iterLength = iteratees.length,
  2944. resIndex = 0,
  2945. takeCount = nativeMin(length, this.__takeCount__);
  2946. if (!isArr || (!isRight && arrLength == length && takeCount == length)) {
  2947. return baseWrapperValue(array, this.__actions__);
  2948. }
  2949. var result = [];
  2950. outer:
  2951. while (length-- && resIndex < takeCount) {
  2952. index += dir;
  2953. var iterIndex = -1,
  2954. value = array[index];
  2955. while (++iterIndex < iterLength) {
  2956. var data = iteratees[iterIndex],
  2957. iteratee = data.iteratee,
  2958. type = data.type,
  2959. computed = iteratee(value);
  2960. if (type == LAZY_MAP_FLAG) {
  2961. value = computed;
  2962. } else if (!computed) {
  2963. if (type == LAZY_FILTER_FLAG) {
  2964. continue outer;
  2965. } else {
  2966. break outer;
  2967. }
  2968. }
  2969. }
  2970. result[resIndex++] = value;
  2971. }
  2972. return result;
  2973. }
  2974. // Ensure `LazyWrapper` is an instance of `baseLodash`.
  2975. LazyWrapper.prototype = baseCreate(baseLodash.prototype);
  2976. LazyWrapper.prototype.constructor = LazyWrapper;
  2977. /*------------------------------------------------------------------------*/
  2978. /**
  2979. * Creates a hash object.
  2980. *
  2981. * @private
  2982. * @constructor
  2983. * @param {Array} [entries] The key-value pairs to cache.
  2984. */
  2985. function Hash(entries) {
  2986. var index = -1,
  2987. length = entries == null ? 0 : entries.length;
  2988. this.clear();
  2989. while (++index < length) {
  2990. var entry = entries[index];
  2991. this.set(entry[0], entry[1]);
  2992. }
  2993. }
  2994. /**
  2995. * Removes all key-value entries from the hash.
  2996. *
  2997. * @private
  2998. * @name clear
  2999. * @memberOf Hash
  3000. */
  3001. function hashClear() {
  3002. this.__data__ = nativeCreate ? nativeCreate(null) : {};
  3003. this.size = 0;
  3004. }
  3005. /**
  3006. * Removes `key` and its value from the hash.
  3007. *
  3008. * @private
  3009. * @name delete
  3010. * @memberOf Hash
  3011. * @param {Object} hash The hash to modify.
  3012. * @param {string} key The key of the value to remove.
  3013. * @returns {boolean} Returns `true` if the entry was removed, else `false`.
  3014. */
  3015. function hashDelete(key) {
  3016. var result = this.has(key) && delete this.__data__[key];
  3017. this.size -= result ? 1 : 0;
  3018. return result;
  3019. }
  3020. /**
  3021. * Gets the hash value for `key`.
  3022. *
  3023. * @private
  3024. * @name get
  3025. * @memberOf Hash
  3026. * @param {string} key The key of the value to get.
  3027. * @returns {*} Returns the entry value.
  3028. */
  3029. function hashGet(key) {
  3030. var data = this.__data__;
  3031. if (nativeCreate) {
  3032. var result = data[key];
  3033. return result === HASH_UNDEFINED ? undefined : result;
  3034. }
  3035. return hasOwnProperty.call(data, key) ? data[key] : undefined;
  3036. }
  3037. /**
  3038. * Checks if a hash value for `key` exists.
  3039. *
  3040. * @private
  3041. * @name has
  3042. * @memberOf Hash
  3043. * @param {string} key The key of the entry to check.
  3044. * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
  3045. */
  3046. function hashHas(key) {
  3047. var data = this.__data__;
  3048. return nativeCreate ? (data[key] !== undefined) : hasOwnProperty.call(data, key);
  3049. }
  3050. /**
  3051. * Sets the hash `key` to `value`.
  3052. *
  3053. * @private
  3054. * @name set
  3055. * @memberOf Hash
  3056. * @param {string} key The key of the value to set.
  3057. * @param {*} value The value to set.
  3058. * @returns {Object} Returns the hash instance.
  3059. */
  3060. function hashSet(key, value) {
  3061. var data = this.__data__;
  3062. this.size += this.has(key) ? 0 : 1;
  3063. data[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value;
  3064. return this;
  3065. }
  3066. // Add methods to `Hash`.
  3067. Hash.prototype.clear = hashClear;
  3068. Hash.prototype['delete'] = hashDelete;
  3069. Hash.prototype.get = hashGet;
  3070. Hash.prototype.has = hashHas;
  3071. Hash.prototype.set = hashSet;
  3072. /*------------------------------------------------------------------------*/
  3073. /**
  3074. * Creates an list cache object.
  3075. *
  3076. * @private
  3077. * @constructor
  3078. * @param {Array} [entries] The key-value pairs to cache.
  3079. */
  3080. function ListCache(entries) {
  3081. var index = -1,
  3082. length = entries == null ? 0 : entries.length;
  3083. this.clear();
  3084. while (++index < length) {
  3085. var entry = entries[index];
  3086. this.set(entry[0], entry[1]);
  3087. }
  3088. }
  3089. /**
  3090. * Removes all key-value entries from the list cache.
  3091. *
  3092. * @private
  3093. * @name clear
  3094. * @memberOf ListCache
  3095. */
  3096. function listCacheClear() {
  3097. this.__data__ = [];
  3098. this.size = 0;
  3099. }
  3100. /**
  3101. * Removes `key` and its value from the list cache.
  3102. *
  3103. * @private
  3104. * @name delete
  3105. * @memberOf ListCache
  3106. * @param {string} key The key of the value to remove.
  3107. * @returns {boolean} Returns `true` if the entry was removed, else `false`.
  3108. */
  3109. function listCacheDelete(key) {
  3110. var data = this.__data__,
  3111. index = assocIndexOf(data, key);
  3112. if (index < 0) {
  3113. return false;
  3114. }
  3115. var lastIndex = data.length - 1;
  3116. if (index == lastIndex) {
  3117. data.pop();
  3118. } else {
  3119. splice.call(data, index, 1);
  3120. }
  3121. --this.size;
  3122. return true;
  3123. }
  3124. /**
  3125. * Gets the list cache value for `key`.
  3126. *
  3127. * @private
  3128. * @name get
  3129. * @memberOf ListCache
  3130. * @param {string} key The key of the value to get.
  3131. * @returns {*} Returns the entry value.
  3132. */
  3133. function listCacheGet(key) {
  3134. var data = this.__data__,
  3135. index = assocIndexOf(data, key);
  3136. return index < 0 ? undefined : data[index][1];
  3137. }
  3138. /**
  3139. * Checks if a list cache value for `key` exists.
  3140. *
  3141. * @private
  3142. * @name has
  3143. * @memberOf ListCache
  3144. * @param {string} key The key of the entry to check.
  3145. * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
  3146. */
  3147. function listCacheHas(key) {
  3148. return assocIndexOf(this.__data__, key) > -1;
  3149. }
  3150. /**
  3151. * Sets the list cache `key` to `value`.
  3152. *
  3153. * @private
  3154. * @name set
  3155. * @memberOf ListCache
  3156. * @param {string} key The key of the value to set.
  3157. * @param {*} value The value to set.
  3158. * @returns {Object} Returns the list cache instance.
  3159. */
  3160. function listCacheSet(key, value) {
  3161. var data = this.__data__,
  3162. index = assocIndexOf(data, key);
  3163. if (index < 0) {
  3164. ++this.size;
  3165. data.push([key, value]);
  3166. } else {
  3167. data[index][1] = value;
  3168. }
  3169. return this;
  3170. }
  3171. // Add methods to `ListCache`.
  3172. ListCache.prototype.clear = listCacheClear;
  3173. ListCache.prototype['delete'] = listCacheDelete;
  3174. ListCache.prototype.get = listCacheGet;
  3175. ListCache.prototype.has = listCacheHas;
  3176. ListCache.prototype.set = listCacheSet;
  3177. /*------------------------------------------------------------------------*/
  3178. /**
  3179. * Creates a map cache object to store key-value pairs.
  3180. *
  3181. * @private
  3182. * @constructor
  3183. * @param {Array} [entries] The key-value pairs to cache.
  3184. */
  3185. function MapCache(entries) {
  3186. var index = -1,
  3187. length = entries == null ? 0 : entries.length;
  3188. this.clear();
  3189. while (++index < length) {
  3190. var entry = entries[index];
  3191. this.set(entry[0], entry[1]);
  3192. }
  3193. }
  3194. /**
  3195. * Removes all key-value entries from the map.
  3196. *
  3197. * @private
  3198. * @name clear
  3199. * @memberOf MapCache
  3200. */
  3201. function mapCacheClear() {
  3202. this.size = 0;
  3203. this.__data__ = {
  3204. 'hash': new Hash,
  3205. 'map': new (Map || ListCache),
  3206. 'string': new Hash
  3207. };
  3208. }
  3209. /**
  3210. * Removes `key` and its value from the map.
  3211. *
  3212. * @private
  3213. * @name delete
  3214. * @memberOf MapCache
  3215. * @param {string} key The key of the value to remove.
  3216. * @returns {boolean} Returns `true` if the entry was removed, else `false`.
  3217. */
  3218. function mapCacheDelete(key) {
  3219. var result = getMapData(this, key)['delete'](key);
  3220. this.size -= result ? 1 : 0;
  3221. return result;
  3222. }
  3223. /**
  3224. * Gets the map value for `key`.
  3225. *
  3226. * @private
  3227. * @name get
  3228. * @memberOf MapCache
  3229. * @param {string} key The key of the value to get.
  3230. * @returns {*} Returns the entry value.
  3231. */
  3232. function mapCacheGet(key) {
  3233. return getMapData(this, key).get(key);
  3234. }
  3235. /**
  3236. * Checks if a map value for `key` exists.
  3237. *
  3238. * @private
  3239. * @name has
  3240. * @memberOf MapCache
  3241. * @param {string} key The key of the entry to check.
  3242. * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
  3243. */
  3244. function mapCacheHas(key) {
  3245. return getMapData(this, key).has(key);
  3246. }
  3247. /**
  3248. * Sets the map `key` to `value`.
  3249. *
  3250. * @private
  3251. * @name set
  3252. * @memberOf MapCache
  3253. * @param {string} key The key of the value to set.
  3254. * @param {*} value The value to set.
  3255. * @returns {Object} Returns the map cache instance.
  3256. */
  3257. function mapCacheSet(key, value) {
  3258. var data = getMapData(this, key),
  3259. size = data.size;
  3260. data.set(key, value);
  3261. this.size += data.size == size ? 0 : 1;
  3262. return this;
  3263. }
  3264. // Add methods to `MapCache`.
  3265. MapCache.prototype.clear = mapCacheClear;
  3266. MapCache.prototype['delete'] = mapCacheDelete;
  3267. MapCache.prototype.get = mapCacheGet;
  3268. MapCache.prototype.has = mapCacheHas;
  3269. MapCache.prototype.set = mapCacheSet;
  3270. /*------------------------------------------------------------------------*/
  3271. /**
  3272. *
  3273. * Creates an array cache object to store unique values.
  3274. *
  3275. * @private
  3276. * @constructor
  3277. * @param {Array} [values] The values to cache.
  3278. */
  3279. function SetCache(values) {
  3280. var index = -1,
  3281. length = values == null ? 0 : values.length;
  3282. this.__data__ = new MapCache;
  3283. while (++index < length) {
  3284. this.add(values[index]);
  3285. }
  3286. }
  3287. /**
  3288. * Adds `value` to the array cache.
  3289. *
  3290. * @private
  3291. * @name add
  3292. * @memberOf SetCache
  3293. * @alias push
  3294. * @param {*} value The value to cache.
  3295. * @returns {Object} Returns the cache instance.
  3296. */
  3297. function setCacheAdd(value) {
  3298. this.__data__.set(value, HASH_UNDEFINED);
  3299. return this;
  3300. }
  3301. /**
  3302. * Checks if `value` is in the array cache.
  3303. *
  3304. * @private
  3305. * @name has
  3306. * @memberOf SetCache
  3307. * @param {*} value The value to search for.
  3308. * @returns {number} Returns `true` if `value` is found, else `false`.
  3309. */
  3310. function setCacheHas(value) {
  3311. return this.__data__.has(value);
  3312. }
  3313. // Add methods to `SetCache`.
  3314. SetCache.prototype.add = SetCache.prototype.push = setCacheAdd;
  3315. SetCache.prototype.has = setCacheHas;
  3316. /*------------------------------------------------------------------------*/
  3317. /**
  3318. * Creates a stack cache object to store key-value pairs.
  3319. *
  3320. * @private
  3321. * @constructor
  3322. * @param {Array} [entries] The key-value pairs to cache.
  3323. */
  3324. function Stack(entries) {
  3325. var data = this.__data__ = new ListCache(entries);
  3326. this.size = data.size;
  3327. }
  3328. /**
  3329. * Removes all key-value entries from the stack.
  3330. *
  3331. * @private
  3332. * @name clear
  3333. * @memberOf Stack
  3334. */
  3335. function stackClear() {
  3336. this.__data__ = new ListCache;
  3337. this.size = 0;
  3338. }
  3339. /**
  3340. * Removes `key` and its value from the stack.
  3341. *
  3342. * @private
  3343. * @name delete
  3344. * @memberOf Stack
  3345. * @param {string} key The key of the value to remove.
  3346. * @returns {boolean} Returns `true` if the entry was removed, else `false`.
  3347. */
  3348. function stackDelete(key) {
  3349. var data = this.__data__,
  3350. result = data['delete'](key);
  3351. this.size = data.size;
  3352. return result;
  3353. }
  3354. /**
  3355. * Gets the stack value for `key`.
  3356. *
  3357. * @private
  3358. * @name get
  3359. * @memberOf Stack
  3360. * @param {string} key The key of the value to get.
  3361. * @returns {*} Returns the entry value.
  3362. */
  3363. function stackGet(key) {
  3364. return this.__data__.get(key);
  3365. }
  3366. /**
  3367. * Checks if a stack value for `key` exists.
  3368. *
  3369. * @private
  3370. * @name has
  3371. * @memberOf Stack
  3372. * @param {string} key The key of the entry to check.
  3373. * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
  3374. */
  3375. function stackHas(key) {
  3376. return this.__data__.has(key);
  3377. }
  3378. /**
  3379. * Sets the stack `key` to `value`.
  3380. *
  3381. * @private
  3382. * @name set
  3383. * @memberOf Stack
  3384. * @param {string} key The key of the value to set.
  3385. * @param {*} value The value to set.
  3386. * @returns {Object} Returns the stack cache instance.
  3387. */
  3388. function stackSet(key, value) {
  3389. var data = this.__data__;
  3390. if (data instanceof ListCache) {
  3391. var pairs = data.__data__;
  3392. if (!Map || (pairs.length < LARGE_ARRAY_SIZE - 1)) {
  3393. pairs.push([key, value]);
  3394. this.size = ++data.size;
  3395. return this;
  3396. }
  3397. data = this.__data__ = new MapCache(pairs);
  3398. }
  3399. data.set(key, value);
  3400. this.size = data.size;
  3401. return this;
  3402. }
  3403. // Add methods to `Stack`.
  3404. Stack.prototype.clear = stackClear;
  3405. Stack.prototype['delete'] = stackDelete;
  3406. Stack.prototype.get = stackGet;
  3407. Stack.prototype.has = stackHas;
  3408. Stack.prototype.set = stackSet;
  3409. /*------------------------------------------------------------------------*/
  3410. /**
  3411. * Creates an array of the enumerable property names of the array-like `value`.
  3412. *
  3413. * @private
  3414. * @param {*} value The value to query.
  3415. * @param {boolean} inherited Specify returning inherited property names.
  3416. * @returns {Array} Returns the array of property names.
  3417. */
  3418. function arrayLikeKeys(value, inherited) {
  3419. var isArr = isArray(value),
  3420. isArg = !isArr && isArguments(value),
  3421. isBuff = !isArr && !isArg && isBuffer(value),
  3422. isType = !isArr && !isArg && !isBuff && isTypedArray(value),
  3423. skipIndexes = isArr || isArg || isBuff || isType,
  3424. result = skipIndexes ? baseTimes(value.length, String) : [],
  3425. length = result.length;
  3426. for (var key in value) {
  3427. if ((inherited || hasOwnProperty.call(value, key)) &&
  3428. !(skipIndexes && (
  3429. // Safari 9 has enumerable `arguments.length` in strict mode.
  3430. key == 'length' ||
  3431. // Node.js 0.10 has enumerable non-index properties on buffers.
  3432. (isBuff && (key == 'offset' || key == 'parent')) ||
  3433. // PhantomJS 2 has enumerable non-index properties on typed arrays.
  3434. (isType && (key == 'buffer' || key == 'byteLength' || key == 'byteOffset')) ||
  3435. // Skip index properties.
  3436. isIndex(key, length)
  3437. ))) {
  3438. result.push(key);
  3439. }
  3440. }
  3441. return result;
  3442. }
  3443. /**
  3444. * A specialized version of `_.sample` for arrays.
  3445. *
  3446. * @private
  3447. * @param {Array} array The array to sample.
  3448. * @returns {*} Returns the random element.
  3449. */
  3450. function arraySample(array) {
  3451. var length = array.length;
  3452. return length ? array[baseRandom(0, length - 1)] : undefined;
  3453. }
  3454. /**
  3455. * A specialized version of `_.sampleSize` for arrays.
  3456. *
  3457. * @private
  3458. * @param {Array} array The array to sample.
  3459. * @param {number} n The number of elements to sample.
  3460. * @returns {Array} Returns the random elements.
  3461. */
  3462. function arraySampleSize(array, n) {
  3463. return shuffleSelf(copyArray(array), baseClamp(n, 0, array.length));
  3464. }
  3465. /**
  3466. * A specialized version of `_.shuffle` for arrays.
  3467. *
  3468. * @private
  3469. * @param {Array} array The array to shuffle.
  3470. * @returns {Array} Returns the new shuffled array.
  3471. */
  3472. function arrayShuffle(array) {
  3473. return shuffleSelf(copyArray(array));
  3474. }
  3475. /**
  3476. * This function is like `assignValue` except that it doesn't assign
  3477. * `undefined` values.
  3478. *
  3479. * @private
  3480. * @param {Object} object The object to modify.
  3481. * @param {string} key The key of the property to assign.
  3482. * @param {*} value The value to assign.
  3483. */
  3484. function assignMergeValue(object, key, value) {
  3485. if ((value !== undefined && !eq(object[key], value)) ||
  3486. (value === undefined && !(key in object))) {
  3487. baseAssignValue(object, key, value);
  3488. }
  3489. }
  3490. /**
  3491. * Assigns `value` to `key` of `object` if the existing value is not equivalent
  3492. * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
  3493. * for equality comparisons.
  3494. *
  3495. * @private
  3496. * @param {Object} object The object to modify.
  3497. * @param {string} key The key of the property to assign.
  3498. * @param {*} value The value to assign.
  3499. */
  3500. function assignValue(object, key, value) {
  3501. var objValue = object[key];
  3502. if (!(hasOwnProperty.call(object, key) && eq(objValue, value)) ||
  3503. (value === undefined && !(key in object))) {
  3504. baseAssignValue(object, key, value);
  3505. }
  3506. }
  3507. /**
  3508. * Gets the index at which the `key` is found in `array` of key-value pairs.
  3509. *
  3510. * @private
  3511. * @param {Array} array The array to inspect.
  3512. * @param {*} key The key to search for.
  3513. * @returns {number} Returns the index of the matched value, else `-1`.
  3514. */
  3515. function assocIndexOf(array, key) {
  3516. var length = array.length;
  3517. while (length--) {
  3518. if (eq(array[length][0], key)) {
  3519. return length;
  3520. }
  3521. }
  3522. return -1;
  3523. }
  3524. /**
  3525. * Aggregates elements of `collection` on `accumulator` with keys transformed
  3526. * by `iteratee` and values set by `setter`.
  3527. *
  3528. * @private
  3529. * @param {Array|Object} collection The collection to iterate over.
  3530. * @param {Function} setter The function to set `accumulator` values.
  3531. * @param {Function} iteratee The iteratee to transform keys.
  3532. * @param {Object} accumulator The initial aggregated object.
  3533. * @returns {Function} Returns `accumulator`.
  3534. */
  3535. function baseAggregator(collection, setter, iteratee, accumulator) {
  3536. baseEach(collection, function(value, key, collection) {
  3537. setter(accumulator, value, iteratee(value), collection);
  3538. });
  3539. return accumulator;
  3540. }
  3541. /**
  3542. * The base implementation of `_.assign` without support for multiple sources
  3543. * or `customizer` functions.
  3544. *
  3545. * @private
  3546. * @param {Object} object The destination object.
  3547. * @param {Object} source The source object.
  3548. * @returns {Object} Returns `object`.
  3549. */
  3550. function baseAssign(object, source) {
  3551. return object && copyObject(source, keys(source), object);
  3552. }
  3553. /**
  3554. * The base implementation of `_.assignIn` without support for multiple sources
  3555. * or `customizer` functions.
  3556. *
  3557. * @private
  3558. * @param {Object} object The destination object.
  3559. * @param {Object} source The source object.
  3560. * @returns {Object} Returns `object`.
  3561. */
  3562. function baseAssignIn(object, source) {
  3563. return object && copyObject(source, keysIn(source), object);
  3564. }
  3565. /**
  3566. * The base implementation of `assignValue` and `assignMergeValue` without
  3567. * value checks.
  3568. *
  3569. * @private
  3570. * @param {Object} object The object to modify.
  3571. * @param {string} key The key of the property to assign.
  3572. * @param {*} value The value to assign.
  3573. */
  3574. function baseAssignValue(object, key, value) {
  3575. if (key == '__proto__' && defineProperty) {
  3576. defineProperty(object, key, {
  3577. 'configurable': true,
  3578. 'enumerable': true,
  3579. 'value': value,
  3580. 'writable': true
  3581. });
  3582. } else {
  3583. object[key] = value;
  3584. }
  3585. }
  3586. /**
  3587. * The base implementation of `_.at` without support for individual paths.
  3588. *
  3589. * @private
  3590. * @param {Object} object The object to iterate over.
  3591. * @param {string[]} paths The property paths to pick.
  3592. * @returns {Array} Returns the picked elements.
  3593. */
  3594. function baseAt(object, paths) {
  3595. var index = -1,
  3596. length = paths.length,
  3597. result = Array(length),
  3598. skip = object == null;
  3599. while (++index < length) {
  3600. result[index] = skip ? undefined : get(object, paths[index]);
  3601. }
  3602. return result;
  3603. }
  3604. /**
  3605. * The base implementation of `_.clamp` which doesn't coerce arguments.
  3606. *
  3607. * @private
  3608. * @param {number} number The number to clamp.
  3609. * @param {number} [lower] The lower bound.
  3610. * @param {number} upper The upper bound.
  3611. * @returns {number} Returns the clamped number.
  3612. */
  3613. function baseClamp(number, lower, upper) {
  3614. if (number === number) {
  3615. if (upper !== undefined) {
  3616. number = number <= upper ? number : upper;
  3617. }
  3618. if (lower !== undefined) {
  3619. number = number >= lower ? number : lower;
  3620. }
  3621. }
  3622. return number;
  3623. }
  3624. /**
  3625. * The base implementation of `_.clone` and `_.cloneDeep` which tracks
  3626. * traversed objects.
  3627. *
  3628. * @private
  3629. * @param {*} value The value to clone.
  3630. * @param {boolean} bitmask The bitmask flags.
  3631. * 1 - Deep clone
  3632. * 2 - Flatten inherited properties
  3633. * 4 - Clone symbols
  3634. * @param {Function} [customizer] The function to customize cloning.
  3635. * @param {string} [key] The key of `value`.
  3636. * @param {Object} [object] The parent object of `value`.
  3637. * @param {Object} [stack] Tracks traversed objects and their clone counterparts.
  3638. * @returns {*} Returns the cloned value.
  3639. */
  3640. function baseClone(value, bitmask, customizer, key, object, stack) {
  3641. var result,
  3642. isDeep = bitmask & CLONE_DEEP_FLAG,
  3643. isFlat = bitmask & CLONE_FLAT_FLAG,
  3644. isFull = bitmask & CLONE_SYMBOLS_FLAG;
  3645. if (customizer) {
  3646. result = object ? customizer(value, key, object, stack) : customizer(value);
  3647. }
  3648. if (result !== undefined) {
  3649. return result;
  3650. }
  3651. if (!isObject(value)) {
  3652. return value;
  3653. }
  3654. var isArr = isArray(value);
  3655. if (isArr) {
  3656. result = initCloneArray(value);
  3657. if (!isDeep) {
  3658. return copyArray(value, result);
  3659. }
  3660. } else {
  3661. var tag = getTag(value),
  3662. isFunc = tag == funcTag || tag == genTag;
  3663. if (isBuffer(value)) {
  3664. return cloneBuffer(value, isDeep);
  3665. }
  3666. if (tag == objectTag || tag == argsTag || (isFunc && !object)) {
  3667. result = (isFlat || isFunc) ? {} : initCloneObject(value);
  3668. if (!isDeep) {
  3669. return isFlat
  3670. ? copySymbolsIn(value, baseAssignIn(result, value))
  3671. : copySymbols(value, baseAssign(result, value));
  3672. }
  3673. } else {
  3674. if (!cloneableTags[tag]) {
  3675. return object ? value : {};
  3676. }
  3677. result = initCloneByTag(value, tag, isDeep);
  3678. }
  3679. }
  3680. // Check for circular references and return its corresponding clone.
  3681. stack || (stack = new Stack);
  3682. var stacked = stack.get(value);
  3683. if (stacked) {
  3684. return stacked;
  3685. }
  3686. stack.set(value, result);
  3687. if (isSet(value)) {
  3688. value.forEach(function(subValue) {
  3689. result.add(baseClone(subValue, bitmask, customizer, subValue, value, stack));
  3690. });
  3691. return result;
  3692. }
  3693. if (isMap(value)) {
  3694. value.forEach(function(subValue, key) {
  3695. result.set(key, baseClone(subValue, bitmask, customizer, key, value, stack));
  3696. });
  3697. return result;
  3698. }
  3699. var keysFunc = isFull
  3700. ? (isFlat ? getAllKeysIn : getAllKeys)
  3701. : (isFlat ? keysIn : keys);
  3702. var props = isArr ? undefined : keysFunc(value);
  3703. arrayEach(props || value, function(subValue, key) {
  3704. if (props) {
  3705. key = subValue;
  3706. subValue = value[key];
  3707. }
  3708. // Recursively populate clone (susceptible to call stack limits).
  3709. assignValue(result, key, baseClone(subValue, bitmask, customizer, key, value, stack));
  3710. });
  3711. return result;
  3712. }
  3713. /**
  3714. * The base implementation of `_.conforms` which doesn't clone `source`.
  3715. *
  3716. * @private
  3717. * @param {Object} source The object of property predicates to conform to.
  3718. * @returns {Function} Returns the new spec function.
  3719. */
  3720. function baseConforms(source) {
  3721. var props = keys(source);
  3722. return function(object) {
  3723. return baseConformsTo(object, source, props);
  3724. };
  3725. }
  3726. /**
  3727. * The base implementation of `_.conformsTo` which accepts `props` to check.
  3728. *
  3729. * @private
  3730. * @param {Object} object The object to inspect.
  3731. * @param {Object} source The object of property predicates to conform to.
  3732. * @returns {boolean} Returns `true` if `object` conforms, else `false`.
  3733. */
  3734. function baseConformsTo(object, source, props) {
  3735. var length = props.length;
  3736. if (object == null) {
  3737. return !length;
  3738. }
  3739. object = Object(object);
  3740. while (length--) {
  3741. var key = props[length],
  3742. predicate = source[key],
  3743. value = object[key];
  3744. if ((value === undefined && !(key in object)) || !predicate(value)) {
  3745. return false;
  3746. }
  3747. }
  3748. return true;
  3749. }
  3750. /**
  3751. * The base implementation of `_.delay` and `_.defer` which accepts `args`
  3752. * to provide to `func`.
  3753. *
  3754. * @private
  3755. * @param {Function} func The function to delay.
  3756. * @param {number} wait The number of milliseconds to delay invocation.
  3757. * @param {Array} args The arguments to provide to `func`.
  3758. * @returns {number|Object} Returns the timer id or timeout object.
  3759. */
  3760. function baseDelay(func, wait, args) {
  3761. if (typeof func != 'function') {
  3762. throw new TypeError(FUNC_ERROR_TEXT);
  3763. }
  3764. return setTimeout(function() { func.apply(undefined, args); }, wait);
  3765. }
  3766. /**
  3767. * The base implementation of methods like `_.difference` without support
  3768. * for excluding multiple arrays or iteratee shorthands.
  3769. *
  3770. * @private
  3771. * @param {Array} array The array to inspect.
  3772. * @param {Array} values The values to exclude.
  3773. * @param {Function} [iteratee] The iteratee invoked per element.
  3774. * @param {Function} [comparator] The comparator invoked per element.
  3775. * @returns {Array} Returns the new array of filtered values.
  3776. */
  3777. function baseDifference(array, values, iteratee, comparator) {
  3778. var index = -1,
  3779. includes = arrayIncludes,
  3780. isCommon = true,
  3781. length = array.length,
  3782. result = [],
  3783. valuesLength = values.length;
  3784. if (!length) {
  3785. return result;
  3786. }
  3787. if (iteratee) {
  3788. values = arrayMap(values, baseUnary(iteratee));
  3789. }
  3790. if (comparator) {
  3791. includes = arrayIncludesWith;
  3792. isCommon = false;
  3793. }
  3794. else if (values.length >= LARGE_ARRAY_SIZE) {
  3795. includes = cacheHas;
  3796. isCommon = false;
  3797. values = new SetCache(values);
  3798. }
  3799. outer:
  3800. while (++index < length) {
  3801. var value = array[index],
  3802. computed = iteratee == null ? value : iteratee(value);
  3803. value = (comparator || value !== 0) ? value : 0;
  3804. if (isCommon && computed === computed) {
  3805. var valuesIndex = valuesLength;
  3806. while (valuesIndex--) {
  3807. if (values[valuesIndex] === computed) {
  3808. continue outer;
  3809. }
  3810. }
  3811. result.push(value);
  3812. }
  3813. else if (!includes(values, computed, comparator)) {
  3814. result.push(value);
  3815. }
  3816. }
  3817. return result;
  3818. }
  3819. /**
  3820. * The base implementation of `_.forEach` without support for iteratee shorthands.
  3821. *
  3822. * @private
  3823. * @param {Array|Object} collection The collection to iterate over.
  3824. * @param {Function} iteratee The function invoked per iteration.
  3825. * @returns {Array|Object} Returns `collection`.
  3826. */
  3827. var baseEach = createBaseEach(baseForOwn);
  3828. /**
  3829. * The base implementation of `_.forEachRight` without support for iteratee shorthands.
  3830. *
  3831. * @private
  3832. * @param {Array|Object} collection The collection to iterate over.
  3833. * @param {Function} iteratee The function invoked per iteration.
  3834. * @returns {Array|Object} Returns `collection`.
  3835. */
  3836. var baseEachRight = createBaseEach(baseForOwnRight, true);
  3837. /**
  3838. * The base implementation of `_.every` without support for iteratee shorthands.
  3839. *
  3840. * @private
  3841. * @param {Array|Object} collection The collection to iterate over.
  3842. * @param {Function} predicate The function invoked per iteration.
  3843. * @returns {boolean} Returns `true` if all elements pass the predicate check,
  3844. * else `false`
  3845. */
  3846. function baseEvery(collection, predicate) {
  3847. var result = true;
  3848. baseEach(collection, function(value, index, collection) {
  3849. result = !!predicate(value, index, collection);
  3850. return result;
  3851. });
  3852. return result;
  3853. }
  3854. /**
  3855. * The base implementation of methods like `_.max` and `_.min` which accepts a
  3856. * `comparator` to determine the extremum value.
  3857. *
  3858. * @private
  3859. * @param {Array} array The array to iterate over.
  3860. * @param {Function} iteratee The iteratee invoked per iteration.
  3861. * @param {Function} comparator The comparator used to compare values.
  3862. * @returns {*} Returns the extremum value.
  3863. */
  3864. function baseExtremum(array, iteratee, comparator) {
  3865. var index = -1,
  3866. length = array.length;
  3867. while (++index < length) {
  3868. var value = array[index],
  3869. current = iteratee(value);
  3870. if (current != null && (computed === undefined
  3871. ? (current === current && !isSymbol(current))
  3872. : comparator(current, computed)
  3873. )) {
  3874. var computed = current,
  3875. result = value;
  3876. }
  3877. }
  3878. return result;
  3879. }
  3880. /**
  3881. * The base implementation of `_.fill` without an iteratee call guard.
  3882. *
  3883. * @private
  3884. * @param {Array} array The array to fill.
  3885. * @param {*} value The value to fill `array` with.
  3886. * @param {number} [start=0] The start position.
  3887. * @param {number} [end=array.length] The end position.
  3888. * @returns {Array} Returns `array`.
  3889. */
  3890. function baseFill(array, value, start, end) {
  3891. var length = array.length;
  3892. start = toInteger(start);
  3893. if (start < 0) {
  3894. start = -start > length ? 0 : (length + start);
  3895. }
  3896. end = (end === undefined || end > length) ? length : toInteger(end);
  3897. if (end < 0) {
  3898. end += length;
  3899. }
  3900. end = start > end ? 0 : toLength(end);
  3901. while (start < end) {
  3902. array[start++] = value;
  3903. }
  3904. return array;
  3905. }
  3906. /**
  3907. * The base implementation of `_.filter` without support for iteratee shorthands.
  3908. *
  3909. * @private
  3910. * @param {Array|Object} collection The collection to iterate over.
  3911. * @param {Function} predicate The function invoked per iteration.
  3912. * @returns {Array} Returns the new filtered array.
  3913. */
  3914. function baseFilter(collection, predicate) {
  3915. var result = [];
  3916. baseEach(collection, function(value, index, collection) {
  3917. if (predicate(value, index, collection)) {
  3918. result.push(value);
  3919. }
  3920. });
  3921. return result;
  3922. }
  3923. /**
  3924. * The base implementation of `_.flatten` with support for restricting flattening.
  3925. *
  3926. * @private
  3927. * @param {Array} array The array to flatten.
  3928. * @param {number} depth The maximum recursion depth.
  3929. * @param {boolean} [predicate=isFlattenable] The function invoked per iteration.
  3930. * @param {boolean} [isStrict] Restrict to values that pass `predicate` checks.
  3931. * @param {Array} [result=[]] The initial result value.
  3932. * @returns {Array} Returns the new flattened array.
  3933. */
  3934. function baseFlatten(array, depth, predicate, isStrict, result) {
  3935. var index = -1,
  3936. length = array.length;
  3937. predicate || (predicate = isFlattenable);
  3938. result || (result = []);
  3939. while (++index < length) {
  3940. var value = array[index];
  3941. if (depth > 0 && predicate(value)) {
  3942. if (depth > 1) {
  3943. // Recursively flatten arrays (susceptible to call stack limits).
  3944. baseFlatten(value, depth - 1, predicate, isStrict, result);
  3945. } else {
  3946. arrayPush(result, value);
  3947. }
  3948. } else if (!isStrict) {
  3949. result[result.length] = value;
  3950. }
  3951. }
  3952. return result;
  3953. }
  3954. /**
  3955. * The base implementation of `baseForOwn` which iterates over `object`
  3956. * properties returned by `keysFunc` and invokes `iteratee` for each property.
  3957. * Iteratee functions may exit iteration early by explicitly returning `false`.
  3958. *
  3959. * @private
  3960. * @param {Object} object The object to iterate over.
  3961. * @param {Function} iteratee The function invoked per iteration.
  3962. * @param {Function} keysFunc The function to get the keys of `object`.
  3963. * @returns {Object} Returns `object`.
  3964. */
  3965. var baseFor = createBaseFor();
  3966. /**
  3967. * This function is like `baseFor` except that it iterates over properties
  3968. * in the opposite order.
  3969. *
  3970. * @private
  3971. * @param {Object} object The object to iterate over.
  3972. * @param {Function} iteratee The function invoked per iteration.
  3973. * @param {Function} keysFunc The function to get the keys of `object`.
  3974. * @returns {Object} Returns `object`.
  3975. */
  3976. var baseForRight = createBaseFor(true);
  3977. /**
  3978. * The base implementation of `_.forOwn` without support for iteratee shorthands.
  3979. *
  3980. * @private
  3981. * @param {Object} object The object to iterate over.
  3982. * @param {Function} iteratee The function invoked per iteration.
  3983. * @returns {Object} Returns `object`.
  3984. */
  3985. function baseForOwn(object, iteratee) {
  3986. return object && baseFor(object, iteratee, keys);
  3987. }
  3988. /**
  3989. * The base implementation of `_.forOwnRight` without support for iteratee shorthands.
  3990. *
  3991. * @private
  3992. * @param {Object} object The object to iterate over.
  3993. * @param {Function} iteratee The function invoked per iteration.
  3994. * @returns {Object} Returns `object`.
  3995. */
  3996. function baseForOwnRight(object, iteratee) {
  3997. return object && baseForRight(object, iteratee, keys);
  3998. }
  3999. /**
  4000. * The base implementation of `_.functions` which creates an array of
  4001. * `object` function property names filtered from `props`.
  4002. *
  4003. * @private
  4004. * @param {Object} object The object to inspect.
  4005. * @param {Array} props The property names to filter.
  4006. * @returns {Array} Returns the function names.
  4007. */
  4008. function baseFunctions(object, props) {
  4009. return arrayFilter(props, function(key) {
  4010. return isFunction(object[key]);
  4011. });
  4012. }
  4013. /**
  4014. * The base implementation of `_.get` without support for default values.
  4015. *
  4016. * @private
  4017. * @param {Object} object The object to query.
  4018. * @param {Array|string} path The path of the property to get.
  4019. * @returns {*} Returns the resolved value.
  4020. */
  4021. function baseGet(object, path) {
  4022. path = castPath(path, object);
  4023. var index = 0,
  4024. length = path.length;
  4025. while (object != null && index < length) {
  4026. object = object[toKey(path[index++])];
  4027. }
  4028. return (index && index == length) ? object : undefined;
  4029. }
  4030. /**
  4031. * The base implementation of `getAllKeys` and `getAllKeysIn` which uses
  4032. * `keysFunc` and `symbolsFunc` to get the enumerable property names and
  4033. * symbols of `object`.
  4034. *
  4035. * @private
  4036. * @param {Object} object The object to query.
  4037. * @param {Function} keysFunc The function to get the keys of `object`.
  4038. * @param {Function} symbolsFunc The function to get the symbols of `object`.
  4039. * @returns {Array} Returns the array of property names and symbols.
  4040. */
  4041. function baseGetAllKeys(object, keysFunc, symbolsFunc) {
  4042. var result = keysFunc(object);
  4043. return isArray(object) ? result : arrayPush(result, symbolsFunc(object));
  4044. }
  4045. /**
  4046. * The base implementation of `getTag` without fallbacks for buggy environments.
  4047. *
  4048. * @private
  4049. * @param {*} value The value to query.
  4050. * @returns {string} Returns the `toStringTag`.
  4051. */
  4052. function baseGetTag(value) {
  4053. if (value == null) {
  4054. return value === undefined ? undefinedTag : nullTag;
  4055. }
  4056. return (symToStringTag && symToStringTag in Object(value))
  4057. ? getRawTag(value)
  4058. : objectToString(value);
  4059. }
  4060. /**
  4061. * The base implementation of `_.gt` which doesn't coerce arguments.
  4062. *
  4063. * @private
  4064. * @param {*} value The value to compare.
  4065. * @param {*} other The other value to compare.
  4066. * @returns {boolean} Returns `true` if `value` is greater than `other`,
  4067. * else `false`.
  4068. */
  4069. function baseGt(value, other) {
  4070. return value > other;
  4071. }
  4072. /**
  4073. * The base implementation of `_.has` without support for deep paths.
  4074. *
  4075. * @private
  4076. * @param {Object} [object] The object to query.
  4077. * @param {Array|string} key The key to check.
  4078. * @returns {boolean} Returns `true` if `key` exists, else `false`.
  4079. */
  4080. function baseHas(object, key) {
  4081. return object != null && hasOwnProperty.call(object, key);
  4082. }
  4083. /**
  4084. * The base implementation of `_.hasIn` without support for deep paths.
  4085. *
  4086. * @private
  4087. * @param {Object} [object] The object to query.
  4088. * @param {Array|string} key The key to check.
  4089. * @returns {boolean} Returns `true` if `key` exists, else `false`.
  4090. */
  4091. function baseHasIn(object, key) {
  4092. return object != null && key in Object(object);
  4093. }
  4094. /**
  4095. * The base implementation of `_.inRange` which doesn't coerce arguments.
  4096. *
  4097. * @private
  4098. * @param {number} number The number to check.
  4099. * @param {number} start The start of the range.
  4100. * @param {number} end The end of the range.
  4101. * @returns {boolean} Returns `true` if `number` is in the range, else `false`.
  4102. */
  4103. function baseInRange(number, start, end) {
  4104. return number >= nativeMin(start, end) && number < nativeMax(start, end);
  4105. }
  4106. /**
  4107. * The base implementation of methods like `_.intersection`, without support
  4108. * for iteratee shorthands, that accepts an array of arrays to inspect.
  4109. *
  4110. * @private
  4111. * @param {Array} arrays The arrays to inspect.
  4112. * @param {Function} [iteratee] The iteratee invoked per element.
  4113. * @param {Function} [comparator] The comparator invoked per element.
  4114. * @returns {Array} Returns the new array of shared values.
  4115. */
  4116. function baseIntersection(arrays, iteratee, comparator) {
  4117. var includes = comparator ? arrayIncludesWith : arrayIncludes,
  4118. length = arrays[0].length,
  4119. othLength = arrays.length,
  4120. othIndex = othLength,
  4121. caches = Array(othLength),
  4122. maxLength = Infinity,
  4123. result = [];
  4124. while (othIndex--) {
  4125. var array = arrays[othIndex];
  4126. if (othIndex && iteratee) {
  4127. array = arrayMap(array, baseUnary(iteratee));
  4128. }
  4129. maxLength = nativeMin(array.length, maxLength);
  4130. caches[othIndex] = !comparator && (iteratee || (length >= 120 && array.length >= 120))
  4131. ? new SetCache(othIndex && array)
  4132. : undefined;
  4133. }
  4134. array = arrays[0];
  4135. var index = -1,
  4136. seen = caches[0];
  4137. outer:
  4138. while (++index < length && result.length < maxLength) {
  4139. var value = array[index],
  4140. computed = iteratee ? iteratee(value) : value;
  4141. value = (comparator || value !== 0) ? value : 0;
  4142. if (!(seen
  4143. ? cacheHas(seen, computed)
  4144. : includes(result, computed, comparator)
  4145. )) {
  4146. othIndex = othLength;
  4147. while (--othIndex) {
  4148. var cache = caches[othIndex];
  4149. if (!(cache
  4150. ? cacheHas(cache, computed)
  4151. : includes(arrays[othIndex], computed, comparator))
  4152. ) {
  4153. continue outer;
  4154. }
  4155. }
  4156. if (seen) {
  4157. seen.push(computed);
  4158. }
  4159. result.push(value);
  4160. }
  4161. }
  4162. return result;
  4163. }
  4164. /**
  4165. * The base implementation of `_.invert` and `_.invertBy` which inverts
  4166. * `object` with values transformed by `iteratee` and set by `setter`.
  4167. *
  4168. * @private
  4169. * @param {Object} object The object to iterate over.
  4170. * @param {Function} setter The function to set `accumulator` values.
  4171. * @param {Function} iteratee The iteratee to transform values.
  4172. * @param {Object} accumulator The initial inverted object.
  4173. * @returns {Function} Returns `accumulator`.
  4174. */
  4175. function baseInverter(object, setter, iteratee, accumulator) {
  4176. baseForOwn(object, function(value, key, object) {
  4177. setter(accumulator, iteratee(value), key, object);
  4178. });
  4179. return accumulator;
  4180. }
  4181. /**
  4182. * The base implementation of `_.invoke` without support for individual
  4183. * method arguments.
  4184. *
  4185. * @private
  4186. * @param {Object} object The object to query.
  4187. * @param {Array|string} path The path of the method to invoke.
  4188. * @param {Array} args The arguments to invoke the method with.
  4189. * @returns {*} Returns the result of the invoked method.
  4190. */
  4191. function baseInvoke(object, path, args) {
  4192. path = castPath(path, object);
  4193. object = parent(object, path);
  4194. var func = object == null ? object : object[toKey(last(path))];
  4195. return func == null ? undefined : apply(func, object, args);
  4196. }
  4197. /**
  4198. * The base implementation of `_.isArguments`.
  4199. *
  4200. * @private
  4201. * @param {*} value The value to check.
  4202. * @returns {boolean} Returns `true` if `value` is an `arguments` object,
  4203. */
  4204. function baseIsArguments(value) {
  4205. return isObjectLike(value) && baseGetTag(value) == argsTag;
  4206. }
  4207. /**
  4208. * The base implementation of `_.isArrayBuffer` without Node.js optimizations.
  4209. *
  4210. * @private
  4211. * @param {*} value The value to check.
  4212. * @returns {boolean} Returns `true` if `value` is an array buffer, else `false`.
  4213. */
  4214. function baseIsArrayBuffer(value) {
  4215. return isObjectLike(value) && baseGetTag(value) == arrayBufferTag;
  4216. }
  4217. /**
  4218. * The base implementation of `_.isDate` without Node.js optimizations.
  4219. *
  4220. * @private
  4221. * @param {*} value The value to check.
  4222. * @returns {boolean} Returns `true` if `value` is a date object, else `false`.
  4223. */
  4224. function baseIsDate(value) {
  4225. return isObjectLike(value) && baseGetTag(value) == dateTag;
  4226. }
  4227. /**
  4228. * The base implementation of `_.isEqual` which supports partial comparisons
  4229. * and tracks traversed objects.
  4230. *
  4231. * @private
  4232. * @param {*} value The value to compare.
  4233. * @param {*} other The other value to compare.
  4234. * @param {boolean} bitmask The bitmask flags.
  4235. * 1 - Unordered comparison
  4236. * 2 - Partial comparison
  4237. * @param {Function} [customizer] The function to customize comparisons.
  4238. * @param {Object} [stack] Tracks traversed `value` and `other` objects.
  4239. * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
  4240. */
  4241. function baseIsEqual(value, other, bitmask, customizer, stack) {
  4242. if (value === other) {
  4243. return true;
  4244. }
  4245. if (value == null || other == null || (!isObjectLike(value) && !isObjectLike(other))) {
  4246. return value !== value && other !== other;
  4247. }
  4248. return baseIsEqualDeep(value, other, bitmask, customizer, baseIsEqual, stack);
  4249. }
  4250. /**
  4251. * A specialized version of `baseIsEqual` for arrays and objects which performs
  4252. * deep comparisons and tracks traversed objects enabling objects with circular
  4253. * references to be compared.
  4254. *
  4255. * @private
  4256. * @param {Object} object The object to compare.
  4257. * @param {Object} other The other object to compare.
  4258. * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.
  4259. * @param {Function} customizer The function to customize comparisons.
  4260. * @param {Function} equalFunc The function to determine equivalents of values.
  4261. * @param {Object} [stack] Tracks traversed `object` and `other` objects.
  4262. * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
  4263. */
  4264. function baseIsEqualDeep(object, other, bitmask, customizer, equalFunc, stack) {
  4265. var objIsArr = isArray(object),
  4266. othIsArr = isArray(other),
  4267. objTag = objIsArr ? arrayTag : getTag(object),
  4268. othTag = othIsArr ? arrayTag : getTag(other);
  4269. objTag = objTag == argsTag ? objectTag : objTag;
  4270. othTag = othTag == argsTag ? objectTag : othTag;
  4271. var objIsObj = objTag == objectTag,
  4272. othIsObj = othTag == objectTag,
  4273. isSameTag = objTag == othTag;
  4274. if (isSameTag && isBuffer(object)) {
  4275. if (!isBuffer(other)) {
  4276. return false;
  4277. }
  4278. objIsArr = true;
  4279. objIsObj = false;
  4280. }
  4281. if (isSameTag && !objIsObj) {
  4282. stack || (stack = new Stack);
  4283. return (objIsArr || isTypedArray(object))
  4284. ? equalArrays(object, other, bitmask, customizer, equalFunc, stack)
  4285. : equalByTag(object, other, objTag, bitmask, customizer, equalFunc, stack);
  4286. }
  4287. if (!(bitmask & COMPARE_PARTIAL_FLAG)) {
  4288. var objIsWrapped = objIsObj && hasOwnProperty.call(object, '__wrapped__'),
  4289. othIsWrapped = othIsObj && hasOwnProperty.call(other, '__wrapped__');
  4290. if (objIsWrapped || othIsWrapped) {
  4291. var objUnwrapped = objIsWrapped ? object.value() : object,
  4292. othUnwrapped = othIsWrapped ? other.value() : other;
  4293. stack || (stack = new Stack);
  4294. return equalFunc(objUnwrapped, othUnwrapped, bitmask, customizer, stack);
  4295. }
  4296. }
  4297. if (!isSameTag) {
  4298. return false;
  4299. }
  4300. stack || (stack = new Stack);
  4301. return equalObjects(object, other, bitmask, customizer, equalFunc, stack);
  4302. }
  4303. /**
  4304. * The base implementation of `_.isMap` without Node.js optimizations.
  4305. *
  4306. * @private
  4307. * @param {*} value The value to check.
  4308. * @returns {boolean} Returns `true` if `value` is a map, else `false`.
  4309. */
  4310. function baseIsMap(value) {
  4311. return isObjectLike(value) && getTag(value) == mapTag;
  4312. }
  4313. /**
  4314. * The base implementation of `_.isMatch` without support for iteratee shorthands.
  4315. *
  4316. * @private
  4317. * @param {Object} object The object to inspect.
  4318. * @param {Object} source The object of property values to match.
  4319. * @param {Array} matchData The property names, values, and compare flags to match.
  4320. * @param {Function} [customizer] The function to customize comparisons.
  4321. * @returns {boolean} Returns `true` if `object` is a match, else `false`.
  4322. */
  4323. function baseIsMatch(object, source, matchData, customizer) {
  4324. var index = matchData.length,
  4325. length = index,
  4326. noCustomizer = !customizer;
  4327. if (object == null) {
  4328. return !length;
  4329. }
  4330. object = Object(object);
  4331. while (index--) {
  4332. var data = matchData[index];
  4333. if ((noCustomizer && data[2])
  4334. ? data[1] !== object[data[0]]
  4335. : !(data[0] in object)
  4336. ) {
  4337. return false;
  4338. }
  4339. }
  4340. while (++index < length) {
  4341. data = matchData[index];
  4342. var key = data[0],
  4343. objValue = object[key],
  4344. srcValue = data[1];
  4345. if (noCustomizer && data[2]) {
  4346. if (objValue === undefined && !(key in object)) {
  4347. return false;
  4348. }
  4349. } else {
  4350. var stack = new Stack;
  4351. if (customizer) {
  4352. var result = customizer(objValue, srcValue, key, object, source, stack);
  4353. }
  4354. if (!(result === undefined
  4355. ? baseIsEqual(srcValue, objValue, COMPARE_PARTIAL_FLAG | COMPARE_UNORDERED_FLAG, customizer, stack)
  4356. : result
  4357. )) {
  4358. return false;
  4359. }
  4360. }
  4361. }
  4362. return true;
  4363. }
  4364. /**
  4365. * The base implementation of `_.isNative` without bad shim checks.
  4366. *
  4367. * @private
  4368. * @param {*} value The value to check.
  4369. * @returns {boolean} Returns `true` if `value` is a native function,
  4370. * else `false`.
  4371. */
  4372. function baseIsNative(value) {
  4373. if (!isObject(value) || isMasked(value)) {
  4374. return false;
  4375. }
  4376. var pattern = isFunction(value) ? reIsNative : reIsHostCtor;
  4377. return pattern.test(toSource(value));
  4378. }
  4379. /**
  4380. * The base implementation of `_.isRegExp` without Node.js optimizations.
  4381. *
  4382. * @private
  4383. * @param {*} value The value to check.
  4384. * @returns {boolean} Returns `true` if `value` is a regexp, else `false`.
  4385. */
  4386. function baseIsRegExp(value) {
  4387. return isObjectLike(value) && baseGetTag(value) == regexpTag;
  4388. }
  4389. /**
  4390. * The base implementation of `_.isSet` without Node.js optimizations.
  4391. *
  4392. * @private
  4393. * @param {*} value The value to check.
  4394. * @returns {boolean} Returns `true` if `value` is a set, else `false`.
  4395. */
  4396. function baseIsSet(value) {
  4397. return isObjectLike(value) && getTag(value) == setTag;
  4398. }
  4399. /**
  4400. * The base implementation of `_.isTypedArray` without Node.js optimizations.
  4401. *
  4402. * @private
  4403. * @param {*} value The value to check.
  4404. * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
  4405. */
  4406. function baseIsTypedArray(value) {
  4407. return isObjectLike(value) &&
  4408. isLength(value.length) && !!typedArrayTags[baseGetTag(value)];
  4409. }
  4410. /**
  4411. * The base implementation of `_.iteratee`.
  4412. *
  4413. * @private
  4414. * @param {*} [value=_.identity] The value to convert to an iteratee.
  4415. * @returns {Function} Returns the iteratee.
  4416. */
  4417. function baseIteratee(value) {
  4418. // Don't store the `typeof` result in a variable to avoid a JIT bug in Safari 9.
  4419. // See https://bugs.webkit.org/show_bug.cgi?id=156034 for more details.
  4420. if (typeof value == 'function') {
  4421. return value;
  4422. }
  4423. if (value == null) {
  4424. return identity;
  4425. }
  4426. if (typeof value == 'object') {
  4427. return isArray(value)
  4428. ? baseMatchesProperty(value[0], value[1])
  4429. : baseMatches(value);
  4430. }
  4431. return property(value);
  4432. }
  4433. /**
  4434. * The base implementation of `_.keys` which doesn't treat sparse arrays as dense.
  4435. *
  4436. * @private
  4437. * @param {Object} object The object to query.
  4438. * @returns {Array} Returns the array of property names.
  4439. */
  4440. function baseKeys(object) {
  4441. if (!isPrototype(object)) {
  4442. return nativeKeys(object);
  4443. }
  4444. var result = [];
  4445. for (var key in Object(object)) {
  4446. if (hasOwnProperty.call(object, key) && key != 'constructor') {
  4447. result.push(key);
  4448. }
  4449. }
  4450. return result;
  4451. }
  4452. /**
  4453. * The base implementation of `_.keysIn` which doesn't treat sparse arrays as dense.
  4454. *
  4455. * @private
  4456. * @param {Object} object The object to query.
  4457. * @returns {Array} Returns the array of property names.
  4458. */
  4459. function baseKeysIn(object) {
  4460. if (!isObject(object)) {
  4461. return nativeKeysIn(object);
  4462. }
  4463. var isProto = isPrototype(object),
  4464. result = [];
  4465. for (var key in object) {
  4466. if (!(key == 'constructor' && (isProto || !hasOwnProperty.call(object, key)))) {
  4467. result.push(key);
  4468. }
  4469. }
  4470. return result;
  4471. }
  4472. /**
  4473. * The base implementation of `_.lt` which doesn't coerce arguments.
  4474. *
  4475. * @private
  4476. * @param {*} value The value to compare.
  4477. * @param {*} other The other value to compare.
  4478. * @returns {boolean} Returns `true` if `value` is less than `other`,
  4479. * else `false`.
  4480. */
  4481. function baseLt(value, other) {
  4482. return value < other;
  4483. }
  4484. /**
  4485. * The base implementation of `_.map` without support for iteratee shorthands.
  4486. *
  4487. * @private
  4488. * @param {Array|Object} collection The collection to iterate over.
  4489. * @param {Function} iteratee The function invoked per iteration.
  4490. * @returns {Array} Returns the new mapped array.
  4491. */
  4492. function baseMap(collection, iteratee) {
  4493. var index = -1,
  4494. result = isArrayLike(collection) ? Array(collection.length) : [];
  4495. baseEach(collection, function(value, key, collection) {
  4496. result[++index] = iteratee(value, key, collection);
  4497. });
  4498. return result;
  4499. }
  4500. /**
  4501. * The base implementation of `_.matches` which doesn't clone `source`.
  4502. *
  4503. * @private
  4504. * @param {Object} source The object of property values to match.
  4505. * @returns {Function} Returns the new spec function.
  4506. */
  4507. function baseMatches(source) {
  4508. var matchData = getMatchData(source);
  4509. if (matchData.length == 1 && matchData[0][2]) {
  4510. return matchesStrictComparable(matchData[0][0], matchData[0][1]);
  4511. }
  4512. return function(object) {
  4513. return object === source || baseIsMatch(object, source, matchData);
  4514. };
  4515. }
  4516. /**
  4517. * The base implementation of `_.matchesProperty` which doesn't clone `srcValue`.
  4518. *
  4519. * @private
  4520. * @param {string} path The path of the property to get.
  4521. * @param {*} srcValue The value to match.
  4522. * @returns {Function} Returns the new spec function.
  4523. */
  4524. function baseMatchesProperty(path, srcValue) {
  4525. if (isKey(path) && isStrictComparable(srcValue)) {
  4526. return matchesStrictComparable(toKey(path), srcValue);
  4527. }
  4528. return function(object) {
  4529. var objValue = get(object, path);
  4530. return (objValue === undefined && objValue === srcValue)
  4531. ? hasIn(object, path)
  4532. : baseIsEqual(srcValue, objValue, COMPARE_PARTIAL_FLAG | COMPARE_UNORDERED_FLAG);
  4533. };
  4534. }
  4535. /**
  4536. * The base implementation of `_.merge` without support for multiple sources.
  4537. *
  4538. * @private
  4539. * @param {Object} object The destination object.
  4540. * @param {Object} source The source object.
  4541. * @param {number} srcIndex The index of `source`.
  4542. * @param {Function} [customizer] The function to customize merged values.
  4543. * @param {Object} [stack] Tracks traversed source values and their merged
  4544. * counterparts.
  4545. */
  4546. function baseMerge(object, source, srcIndex, customizer, stack) {
  4547. if (object === source) {
  4548. return;
  4549. }
  4550. baseFor(source, function(srcValue, key) {
  4551. if (isObject(srcValue)) {
  4552. stack || (stack = new Stack);
  4553. baseMergeDeep(object, source, key, srcIndex, baseMerge, customizer, stack);
  4554. }
  4555. else {
  4556. var newValue = customizer
  4557. ? customizer(safeGet(object, key), srcValue, (key + ''), object, source, stack)
  4558. : undefined;
  4559. if (newValue === undefined) {
  4560. newValue = srcValue;
  4561. }
  4562. assignMergeValue(object, key, newValue);
  4563. }
  4564. }, keysIn);
  4565. }
  4566. /**
  4567. * A specialized version of `baseMerge` for arrays and objects which performs
  4568. * deep merges and tracks traversed objects enabling objects with circular
  4569. * references to be merged.
  4570. *
  4571. * @private
  4572. * @param {Object} object The destination object.
  4573. * @param {Object} source The source object.
  4574. * @param {string} key The key of the value to merge.
  4575. * @param {number} srcIndex The index of `source`.
  4576. * @param {Function} mergeFunc The function to merge values.
  4577. * @param {Function} [customizer] The function to customize assigned values.
  4578. * @param {Object} [stack] Tracks traversed source values and their merged
  4579. * counterparts.
  4580. */
  4581. function baseMergeDeep(object, source, key, srcIndex, mergeFunc, customizer, stack) {
  4582. var objValue = safeGet(object, key),
  4583. srcValue = safeGet(source, key),
  4584. stacked = stack.get(srcValue);
  4585. if (stacked) {
  4586. assignMergeValue(object, key, stacked);
  4587. return;
  4588. }
  4589. var newValue = customizer
  4590. ? customizer(objValue, srcValue, (key + ''), object, source, stack)
  4591. : undefined;
  4592. var isCommon = newValue === undefined;
  4593. if (isCommon) {
  4594. var isArr = isArray(srcValue),
  4595. isBuff = !isArr && isBuffer(srcValue),
  4596. isTyped = !isArr && !isBuff && isTypedArray(srcValue);
  4597. newValue = srcValue;
  4598. if (isArr || isBuff || isTyped) {
  4599. if (isArray(objValue)) {
  4600. newValue = objValue;
  4601. }
  4602. else if (isArrayLikeObject(objValue)) {
  4603. newValue = copyArray(objValue);
  4604. }
  4605. else if (isBuff) {
  4606. isCommon = false;
  4607. newValue = cloneBuffer(srcValue, true);
  4608. }
  4609. else if (isTyped) {
  4610. isCommon = false;
  4611. newValue = cloneTypedArray(srcValue, true);
  4612. }
  4613. else {
  4614. newValue = [];
  4615. }
  4616. }
  4617. else if (isPlainObject(srcValue) || isArguments(srcValue)) {
  4618. newValue = objValue;
  4619. if (isArguments(objValue)) {
  4620. newValue = toPlainObject(objValue);
  4621. }
  4622. else if (!isObject(objValue) || (srcIndex && isFunction(objValue))) {
  4623. newValue = initCloneObject(srcValue);
  4624. }
  4625. }
  4626. else {
  4627. isCommon = false;
  4628. }
  4629. }
  4630. if (isCommon) {
  4631. // Recursively merge objects and arrays (susceptible to call stack limits).
  4632. stack.set(srcValue, newValue);
  4633. mergeFunc(newValue, srcValue, srcIndex, customizer, stack);
  4634. stack['delete'](srcValue);
  4635. }
  4636. assignMergeValue(object, key, newValue);
  4637. }
  4638. /**
  4639. * The base implementation of `_.nth` which doesn't coerce arguments.
  4640. *
  4641. * @private
  4642. * @param {Array} array The array to query.
  4643. * @param {number} n The index of the element to return.
  4644. * @returns {*} Returns the nth element of `array`.
  4645. */
  4646. function baseNth(array, n) {
  4647. var length = array.length;
  4648. if (!length) {
  4649. return;
  4650. }
  4651. n += n < 0 ? length : 0;
  4652. return isIndex(n, length) ? array[n] : undefined;
  4653. }
  4654. /**
  4655. * The base implementation of `_.orderBy` without param guards.
  4656. *
  4657. * @private
  4658. * @param {Array|Object} collection The collection to iterate over.
  4659. * @param {Function[]|Object[]|string[]} iteratees The iteratees to sort by.
  4660. * @param {string[]} orders The sort orders of `iteratees`.
  4661. * @returns {Array} Returns the new sorted array.
  4662. */
  4663. function baseOrderBy(collection, iteratees, orders) {
  4664. var index = -1;
  4665. iteratees = arrayMap(iteratees.length ? iteratees : [identity], baseUnary(getIteratee()));
  4666. var result = baseMap(collection, function(value, key, collection) {
  4667. var criteria = arrayMap(iteratees, function(iteratee) {
  4668. return iteratee(value);
  4669. });
  4670. return { 'criteria': criteria, 'index': ++index, 'value': value };
  4671. });
  4672. return baseSortBy(result, function(object, other) {
  4673. return compareMultiple(object, other, orders);
  4674. });
  4675. }
  4676. /**
  4677. * The base implementation of `_.pick` without support for individual
  4678. * property identifiers.
  4679. *
  4680. * @private
  4681. * @param {Object} object The source object.
  4682. * @param {string[]} paths The property paths to pick.
  4683. * @returns {Object} Returns the new object.
  4684. */
  4685. function basePick(object, paths) {
  4686. return basePickBy(object, paths, function(value, path) {
  4687. return hasIn(object, path);
  4688. });
  4689. }
  4690. /**
  4691. * The base implementation of `_.pickBy` without support for iteratee shorthands.
  4692. *
  4693. * @private
  4694. * @param {Object} object The source object.
  4695. * @param {string[]} paths The property paths to pick.
  4696. * @param {Function} predicate The function invoked per property.
  4697. * @returns {Object} Returns the new object.
  4698. */
  4699. function basePickBy(object, paths, predicate) {
  4700. var index = -1,
  4701. length = paths.length,
  4702. result = {};
  4703. while (++index < length) {
  4704. var path = paths[index],
  4705. value = baseGet(object, path);
  4706. if (predicate(value, path)) {
  4707. baseSet(result, castPath(path, object), value);
  4708. }
  4709. }
  4710. return result;
  4711. }
  4712. /**
  4713. * A specialized version of `baseProperty` which supports deep paths.
  4714. *
  4715. * @private
  4716. * @param {Array|string} path The path of the property to get.
  4717. * @returns {Function} Returns the new accessor function.
  4718. */
  4719. function basePropertyDeep(path) {
  4720. return function(object) {
  4721. return baseGet(object, path);
  4722. };
  4723. }
  4724. /**
  4725. * The base implementation of `_.pullAllBy` without support for iteratee
  4726. * shorthands.
  4727. *
  4728. * @private
  4729. * @param {Array} array The array to modify.
  4730. * @param {Array} values The values to remove.
  4731. * @param {Function} [iteratee] The iteratee invoked per element.
  4732. * @param {Function} [comparator] The comparator invoked per element.
  4733. * @returns {Array} Returns `array`.
  4734. */
  4735. function basePullAll(array, values, iteratee, comparator) {
  4736. var indexOf = comparator ? baseIndexOfWith : baseIndexOf,
  4737. index = -1,
  4738. length = values.length,
  4739. seen = array;
  4740. if (array === values) {
  4741. values = copyArray(values);
  4742. }
  4743. if (iteratee) {
  4744. seen = arrayMap(array, baseUnary(iteratee));
  4745. }
  4746. while (++index < length) {
  4747. var fromIndex = 0,
  4748. value = values[index],
  4749. computed = iteratee ? iteratee(value) : value;
  4750. while ((fromIndex = indexOf(seen, computed, fromIndex, comparator)) > -1) {
  4751. if (seen !== array) {
  4752. splice.call(seen, fromIndex, 1);
  4753. }
  4754. splice.call(array, fromIndex, 1);
  4755. }
  4756. }
  4757. return array;
  4758. }
  4759. /**
  4760. * The base implementation of `_.pullAt` without support for individual
  4761. * indexes or capturing the removed elements.
  4762. *
  4763. * @private
  4764. * @param {Array} array The array to modify.
  4765. * @param {number[]} indexes The indexes of elements to remove.
  4766. * @returns {Array} Returns `array`.
  4767. */
  4768. function basePullAt(array, indexes) {
  4769. var length = array ? indexes.length : 0,
  4770. lastIndex = length - 1;
  4771. while (length--) {
  4772. var index = indexes[length];
  4773. if (length == lastIndex || index !== previous) {
  4774. var previous = index;
  4775. if (isIndex(index)) {
  4776. splice.call(array, index, 1);
  4777. } else {
  4778. baseUnset(array, index);
  4779. }
  4780. }
  4781. }
  4782. return array;
  4783. }
  4784. /**
  4785. * The base implementation of `_.random` without support for returning
  4786. * floating-point numbers.
  4787. *
  4788. * @private
  4789. * @param {number} lower The lower bound.
  4790. * @param {number} upper The upper bound.
  4791. * @returns {number} Returns the random number.
  4792. */
  4793. function baseRandom(lower, upper) {
  4794. return lower + nativeFloor(nativeRandom() * (upper - lower + 1));
  4795. }
  4796. /**
  4797. * The base implementation of `_.range` and `_.rangeRight` which doesn't
  4798. * coerce arguments.
  4799. *
  4800. * @private
  4801. * @param {number} start The start of the range.
  4802. * @param {number} end The end of the range.
  4803. * @param {number} step The value to increment or decrement by.
  4804. * @param {boolean} [fromRight] Specify iterating from right to left.
  4805. * @returns {Array} Returns the range of numbers.
  4806. */
  4807. function baseRange(start, end, step, fromRight) {
  4808. var index = -1,
  4809. length = nativeMax(nativeCeil((end - start) / (step || 1)), 0),
  4810. result = Array(length);
  4811. while (length--) {
  4812. result[fromRight ? length : ++index] = start;
  4813. start += step;
  4814. }
  4815. return result;
  4816. }
  4817. /**
  4818. * The base implementation of `_.repeat` which doesn't coerce arguments.
  4819. *
  4820. * @private
  4821. * @param {string} string The string to repeat.
  4822. * @param {number} n The number of times to repeat the string.
  4823. * @returns {string} Returns the repeated string.
  4824. */
  4825. function baseRepeat(string, n) {
  4826. var result = '';
  4827. if (!string || n < 1 || n > MAX_SAFE_INTEGER) {
  4828. return result;
  4829. }
  4830. // Leverage the exponentiation by squaring algorithm for a faster repeat.
  4831. // See https://en.wikipedia.org/wiki/Exponentiation_by_squaring for more details.
  4832. do {
  4833. if (n % 2) {
  4834. result += string;
  4835. }
  4836. n = nativeFloor(n / 2);
  4837. if (n) {
  4838. string += string;
  4839. }
  4840. } while (n);
  4841. return result;
  4842. }
  4843. /**
  4844. * The base implementation of `_.rest` which doesn't validate or coerce arguments.
  4845. *
  4846. * @private
  4847. * @param {Function} func The function to apply a rest parameter to.
  4848. * @param {number} [start=func.length-1] The start position of the rest parameter.
  4849. * @returns {Function} Returns the new function.
  4850. */
  4851. function baseRest(func, start) {
  4852. return setToString(overRest(func, start, identity), func + '');
  4853. }
  4854. /**
  4855. * The base implementation of `_.sample`.
  4856. *
  4857. * @private
  4858. * @param {Array|Object} collection The collection to sample.
  4859. * @returns {*} Returns the random element.
  4860. */
  4861. function baseSample(collection) {
  4862. return arraySample(values(collection));
  4863. }
  4864. /**
  4865. * The base implementation of `_.sampleSize` without param guards.
  4866. *
  4867. * @private
  4868. * @param {Array|Object} collection The collection to sample.
  4869. * @param {number} n The number of elements to sample.
  4870. * @returns {Array} Returns the random elements.
  4871. */
  4872. function baseSampleSize(collection, n) {
  4873. var array = values(collection);
  4874. return shuffleSelf(array, baseClamp(n, 0, array.length));
  4875. }
  4876. /**
  4877. * The base implementation of `_.set`.
  4878. *
  4879. * @private
  4880. * @param {Object} object The object to modify.
  4881. * @param {Array|string} path The path of the property to set.
  4882. * @param {*} value The value to set.
  4883. * @param {Function} [customizer] The function to customize path creation.
  4884. * @returns {Object} Returns `object`.
  4885. */
  4886. function baseSet(object, path, value, customizer) {
  4887. if (!isObject(object)) {
  4888. return object;
  4889. }
  4890. path = castPath(path, object);
  4891. var index = -1,
  4892. length = path.length,
  4893. lastIndex = length - 1,
  4894. nested = object;
  4895. while (nested != null && ++index < length) {
  4896. var key = toKey(path[index]),
  4897. newValue = value;
  4898. if (index != lastIndex) {
  4899. var objValue = nested[key];
  4900. newValue = customizer ? customizer(objValue, key, nested) : undefined;
  4901. if (newValue === undefined) {
  4902. newValue = isObject(objValue)
  4903. ? objValue
  4904. : (isIndex(path[index + 1]) ? [] : {});
  4905. }
  4906. }
  4907. assignValue(nested, key, newValue);
  4908. nested = nested[key];
  4909. }
  4910. return object;
  4911. }
  4912. /**
  4913. * The base implementation of `setData` without support for hot loop shorting.
  4914. *
  4915. * @private
  4916. * @param {Function} func The function to associate metadata with.
  4917. * @param {*} data The metadata.
  4918. * @returns {Function} Returns `func`.
  4919. */
  4920. var baseSetData = !metaMap ? identity : function(func, data) {
  4921. metaMap.set(func, data);
  4922. return func;
  4923. };
  4924. /**
  4925. * The base implementation of `setToString` without support for hot loop shorting.
  4926. *
  4927. * @private
  4928. * @param {Function} func The function to modify.
  4929. * @param {Function} string The `toString` result.
  4930. * @returns {Function} Returns `func`.
  4931. */
  4932. var baseSetToString = !defineProperty ? identity : function(func, string) {
  4933. return defineProperty(func, 'toString', {
  4934. 'configurable': true,
  4935. 'enumerable': false,
  4936. 'value': constant(string),
  4937. 'writable': true
  4938. });
  4939. };
  4940. /**
  4941. * The base implementation of `_.shuffle`.
  4942. *
  4943. * @private
  4944. * @param {Array|Object} collection The collection to shuffle.
  4945. * @returns {Array} Returns the new shuffled array.
  4946. */
  4947. function baseShuffle(collection) {
  4948. return shuffleSelf(values(collection));
  4949. }
  4950. /**
  4951. * The base implementation of `_.slice` without an iteratee call guard.
  4952. *
  4953. * @private
  4954. * @param {Array} array The array to slice.
  4955. * @param {number} [start=0] The start position.
  4956. * @param {number} [end=array.length] The end position.
  4957. * @returns {Array} Returns the slice of `array`.
  4958. */
  4959. function baseSlice(array, start, end) {
  4960. var index = -1,
  4961. length = array.length;
  4962. if (start < 0) {
  4963. start = -start > length ? 0 : (length + start);
  4964. }
  4965. end = end > length ? length : end;
  4966. if (end < 0) {
  4967. end += length;
  4968. }
  4969. length = start > end ? 0 : ((end - start) >>> 0);
  4970. start >>>= 0;
  4971. var result = Array(length);
  4972. while (++index < length) {
  4973. result[index] = array[index + start];
  4974. }
  4975. return result;
  4976. }
  4977. /**
  4978. * The base implementation of `_.some` without support for iteratee shorthands.
  4979. *
  4980. * @private
  4981. * @param {Array|Object} collection The collection to iterate over.
  4982. * @param {Function} predicate The function invoked per iteration.
  4983. * @returns {boolean} Returns `true` if any element passes the predicate check,
  4984. * else `false`.
  4985. */
  4986. function baseSome(collection, predicate) {
  4987. var result;
  4988. baseEach(collection, function(value, index, collection) {
  4989. result = predicate(value, index, collection);
  4990. return !result;
  4991. });
  4992. return !!result;
  4993. }
  4994. /**
  4995. * The base implementation of `_.sortedIndex` and `_.sortedLastIndex` which
  4996. * performs a binary search of `array` to determine the index at which `value`
  4997. * should be inserted into `array` in order to maintain its sort order.
  4998. *
  4999. * @private
  5000. * @param {Array} array The sorted array to inspect.
  5001. * @param {*} value The value to evaluate.
  5002. * @param {boolean} [retHighest] Specify returning the highest qualified index.
  5003. * @returns {number} Returns the index at which `value` should be inserted
  5004. * into `array`.
  5005. */
  5006. function baseSortedIndex(array, value, retHighest) {
  5007. var low = 0,
  5008. high = array == null ? low : array.length;
  5009. if (typeof value == 'number' && value === value && high <= HALF_MAX_ARRAY_LENGTH) {
  5010. while (low < high) {
  5011. var mid = (low + high) >>> 1,
  5012. computed = array[mid];
  5013. if (computed !== null && !isSymbol(computed) &&
  5014. (retHighest ? (computed <= value) : (computed < value))) {
  5015. low = mid + 1;
  5016. } else {
  5017. high = mid;
  5018. }
  5019. }
  5020. return high;
  5021. }
  5022. return baseSortedIndexBy(array, value, identity, retHighest);
  5023. }
  5024. /**
  5025. * The base implementation of `_.sortedIndexBy` and `_.sortedLastIndexBy`
  5026. * which invokes `iteratee` for `value` and each element of `array` to compute
  5027. * their sort ranking. The iteratee is invoked with one argument; (value).
  5028. *
  5029. * @private
  5030. * @param {Array} array The sorted array to inspect.
  5031. * @param {*} value The value to evaluate.
  5032. * @param {Function} iteratee The iteratee invoked per element.
  5033. * @param {boolean} [retHighest] Specify returning the highest qualified index.
  5034. * @returns {number} Returns the index at which `value` should be inserted
  5035. * into `array`.
  5036. */
  5037. function baseSortedIndexBy(array, value, iteratee, retHighest) {
  5038. value = iteratee(value);
  5039. var low = 0,
  5040. high = array == null ? 0 : array.length,
  5041. valIsNaN = value !== value,
  5042. valIsNull = value === null,
  5043. valIsSymbol = isSymbol(value),
  5044. valIsUndefined = value === undefined;
  5045. while (low < high) {
  5046. var mid = nativeFloor((low + high) / 2),
  5047. computed = iteratee(array[mid]),
  5048. othIsDefined = computed !== undefined,
  5049. othIsNull = computed === null,
  5050. othIsReflexive = computed === computed,
  5051. othIsSymbol = isSymbol(computed);
  5052. if (valIsNaN) {
  5053. var setLow = retHighest || othIsReflexive;
  5054. } else if (valIsUndefined) {
  5055. setLow = othIsReflexive && (retHighest || othIsDefined);
  5056. } else if (valIsNull) {
  5057. setLow = othIsReflexive && othIsDefined && (retHighest || !othIsNull);
  5058. } else if (valIsSymbol) {
  5059. setLow = othIsReflexive && othIsDefined && !othIsNull && (retHighest || !othIsSymbol);
  5060. } else if (othIsNull || othIsSymbol) {
  5061. setLow = false;
  5062. } else {
  5063. setLow = retHighest ? (computed <= value) : (computed < value);
  5064. }
  5065. if (setLow) {
  5066. low = mid + 1;
  5067. } else {
  5068. high = mid;
  5069. }
  5070. }
  5071. return nativeMin(high, MAX_ARRAY_INDEX);
  5072. }
  5073. /**
  5074. * The base implementation of `_.sortedUniq` and `_.sortedUniqBy` without
  5075. * support for iteratee shorthands.
  5076. *
  5077. * @private
  5078. * @param {Array} array The array to inspect.
  5079. * @param {Function} [iteratee] The iteratee invoked per element.
  5080. * @returns {Array} Returns the new duplicate free array.
  5081. */
  5082. function baseSortedUniq(array, iteratee) {
  5083. var index = -1,
  5084. length = array.length,
  5085. resIndex = 0,
  5086. result = [];
  5087. while (++index < length) {
  5088. var value = array[index],
  5089. computed = iteratee ? iteratee(value) : value;
  5090. if (!index || !eq(computed, seen)) {
  5091. var seen = computed;
  5092. result[resIndex++] = value === 0 ? 0 : value;
  5093. }
  5094. }
  5095. return result;
  5096. }
  5097. /**
  5098. * The base implementation of `_.toNumber` which doesn't ensure correct
  5099. * conversions of binary, hexadecimal, or octal string values.
  5100. *
  5101. * @private
  5102. * @param {*} value The value to process.
  5103. * @returns {number} Returns the number.
  5104. */
  5105. function baseToNumber(value) {
  5106. if (typeof value == 'number') {
  5107. return value;
  5108. }
  5109. if (isSymbol(value)) {
  5110. return NAN;
  5111. }
  5112. return +value;
  5113. }
  5114. /**
  5115. * The base implementation of `_.toString` which doesn't convert nullish
  5116. * values to empty strings.
  5117. *
  5118. * @private
  5119. * @param {*} value The value to process.
  5120. * @returns {string} Returns the string.
  5121. */
  5122. function baseToString(value) {
  5123. // Exit early for strings to avoid a performance hit in some environments.
  5124. if (typeof value == 'string') {
  5125. return value;
  5126. }
  5127. if (isArray(value)) {
  5128. // Recursively convert values (susceptible to call stack limits).
  5129. return arrayMap(value, baseToString) + '';
  5130. }
  5131. if (isSymbol(value)) {
  5132. return symbolToString ? symbolToString.call(value) : '';
  5133. }
  5134. var result = (value + '');
  5135. return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
  5136. }
  5137. /**
  5138. * The base implementation of `_.uniqBy` without support for iteratee shorthands.
  5139. *
  5140. * @private
  5141. * @param {Array} array The array to inspect.
  5142. * @param {Function} [iteratee] The iteratee invoked per element.
  5143. * @param {Function} [comparator] The comparator invoked per element.
  5144. * @returns {Array} Returns the new duplicate free array.
  5145. */
  5146. function baseUniq(array, iteratee, comparator) {
  5147. var index = -1,
  5148. includes = arrayIncludes,
  5149. length = array.length,
  5150. isCommon = true,
  5151. result = [],
  5152. seen = result;
  5153. if (comparator) {
  5154. isCommon = false;
  5155. includes = arrayIncludesWith;
  5156. }
  5157. else if (length >= LARGE_ARRAY_SIZE) {
  5158. var set = iteratee ? null : createSet(array);
  5159. if (set) {
  5160. return setToArray(set);
  5161. }
  5162. isCommon = false;
  5163. includes = cacheHas;
  5164. seen = new SetCache;
  5165. }
  5166. else {
  5167. seen = iteratee ? [] : result;
  5168. }
  5169. outer:
  5170. while (++index < length) {
  5171. var value = array[index],
  5172. computed = iteratee ? iteratee(value) : value;
  5173. value = (comparator || value !== 0) ? value : 0;
  5174. if (isCommon && computed === computed) {
  5175. var seenIndex = seen.length;
  5176. while (seenIndex--) {
  5177. if (seen[seenIndex] === computed) {
  5178. continue outer;
  5179. }
  5180. }
  5181. if (iteratee) {
  5182. seen.push(computed);
  5183. }
  5184. result.push(value);
  5185. }
  5186. else if (!includes(seen, computed, comparator)) {
  5187. if (seen !== result) {
  5188. seen.push(computed);
  5189. }
  5190. result.push(value);
  5191. }
  5192. }
  5193. return result;
  5194. }
  5195. /**
  5196. * The base implementation of `_.unset`.
  5197. *
  5198. * @private
  5199. * @param {Object} object The object to modify.
  5200. * @param {Array|string} path The property path to unset.
  5201. * @returns {boolean} Returns `true` if the property is deleted, else `false`.
  5202. */
  5203. function baseUnset(object, path) {
  5204. path = castPath(path, object);
  5205. object = parent(object, path);
  5206. return object == null || delete object[toKey(last(path))];
  5207. }
  5208. /**
  5209. * The base implementation of `_.update`.
  5210. *
  5211. * @private
  5212. * @param {Object} object The object to modify.
  5213. * @param {Array|string} path The path of the property to update.
  5214. * @param {Function} updater The function to produce the updated value.
  5215. * @param {Function} [customizer] The function to customize path creation.
  5216. * @returns {Object} Returns `object`.
  5217. */
  5218. function baseUpdate(object, path, updater, customizer) {
  5219. return baseSet(object, path, updater(baseGet(object, path)), customizer);
  5220. }
  5221. /**
  5222. * The base implementation of methods like `_.dropWhile` and `_.takeWhile`
  5223. * without support for iteratee shorthands.
  5224. *
  5225. * @private
  5226. * @param {Array} array The array to query.
  5227. * @param {Function} predicate The function invoked per iteration.
  5228. * @param {boolean} [isDrop] Specify dropping elements instead of taking them.
  5229. * @param {boolean} [fromRight] Specify iterating from right to left.
  5230. * @returns {Array} Returns the slice of `array`.
  5231. */
  5232. function baseWhile(array, predicate, isDrop, fromRight) {
  5233. var length = array.length,
  5234. index = fromRight ? length : -1;
  5235. while ((fromRight ? index-- : ++index < length) &&
  5236. predicate(array[index], index, array)) {}
  5237. return isDrop
  5238. ? baseSlice(array, (fromRight ? 0 : index), (fromRight ? index + 1 : length))
  5239. : baseSlice(array, (fromRight ? index + 1 : 0), (fromRight ? length : index));
  5240. }
  5241. /**
  5242. * The base implementation of `wrapperValue` which returns the result of
  5243. * performing a sequence of actions on the unwrapped `value`, where each
  5244. * successive action is supplied the return value of the previous.
  5245. *
  5246. * @private
  5247. * @param {*} value The unwrapped value.
  5248. * @param {Array} actions Actions to perform to resolve the unwrapped value.
  5249. * @returns {*} Returns the resolved value.
  5250. */
  5251. function baseWrapperValue(value, actions) {
  5252. var result = value;
  5253. if (result instanceof LazyWrapper) {
  5254. result = result.value();
  5255. }
  5256. return arrayReduce(actions, function(result, action) {
  5257. return action.func.apply(action.thisArg, arrayPush([result], action.args));
  5258. }, result);
  5259. }
  5260. /**
  5261. * The base implementation of methods like `_.xor`, without support for
  5262. * iteratee shorthands, that accepts an array of arrays to inspect.
  5263. *
  5264. * @private
  5265. * @param {Array} arrays The arrays to inspect.
  5266. * @param {Function} [iteratee] The iteratee invoked per element.
  5267. * @param {Function} [comparator] The comparator invoked per element.
  5268. * @returns {Array} Returns the new array of values.
  5269. */
  5270. function baseXor(arrays, iteratee, comparator) {
  5271. var length = arrays.length;
  5272. if (length < 2) {
  5273. return length ? baseUniq(arrays[0]) : [];
  5274. }
  5275. var index = -1,
  5276. result = Array(length);
  5277. while (++index < length) {
  5278. var array = arrays[index],
  5279. othIndex = -1;
  5280. while (++othIndex < length) {
  5281. if (othIndex != index) {
  5282. result[index] = baseDifference(result[index] || array, arrays[othIndex], iteratee, comparator);
  5283. }
  5284. }
  5285. }
  5286. return baseUniq(baseFlatten(result, 1), iteratee, comparator);
  5287. }
  5288. /**
  5289. * This base implementation of `_.zipObject` which assigns values using `assignFunc`.
  5290. *
  5291. * @private
  5292. * @param {Array} props The property identifiers.
  5293. * @param {Array} values The property values.
  5294. * @param {Function} assignFunc The function to assign values.
  5295. * @returns {Object} Returns the new object.
  5296. */
  5297. function baseZipObject(props, values, assignFunc) {
  5298. var index = -1,
  5299. length = props.length,
  5300. valsLength = values.length,
  5301. result = {};
  5302. while (++index < length) {
  5303. var value = index < valsLength ? values[index] : undefined;
  5304. assignFunc(result, props[index], value);
  5305. }
  5306. return result;
  5307. }
  5308. /**
  5309. * Casts `value` to an empty array if it's not an array like object.
  5310. *
  5311. * @private
  5312. * @param {*} value The value to inspect.
  5313. * @returns {Array|Object} Returns the cast array-like object.
  5314. */
  5315. function castArrayLikeObject(value) {
  5316. return isArrayLikeObject(value) ? value : [];
  5317. }
  5318. /**
  5319. * Casts `value` to `identity` if it's not a function.
  5320. *
  5321. * @private
  5322. * @param {*} value The value to inspect.
  5323. * @returns {Function} Returns cast function.
  5324. */
  5325. function castFunction(value) {
  5326. return typeof value == 'function' ? value : identity;
  5327. }
  5328. /**
  5329. * Casts `value` to a path array if it's not one.
  5330. *
  5331. * @private
  5332. * @param {*} value The value to inspect.
  5333. * @param {Object} [object] The object to query keys on.
  5334. * @returns {Array} Returns the cast property path array.
  5335. */
  5336. function castPath(value, object) {
  5337. if (isArray(value)) {
  5338. return value;
  5339. }
  5340. return isKey(value, object) ? [value] : stringToPath(toString(value));
  5341. }
  5342. /**
  5343. * A `baseRest` alias which can be replaced with `identity` by module
  5344. * replacement plugins.
  5345. *
  5346. * @private
  5347. * @type {Function}
  5348. * @param {Function} func The function to apply a rest parameter to.
  5349. * @returns {Function} Returns the new function.
  5350. */
  5351. var castRest = baseRest;
  5352. /**
  5353. * Casts `array` to a slice if it's needed.
  5354. *
  5355. * @private
  5356. * @param {Array} array The array to inspect.
  5357. * @param {number} start The start position.
  5358. * @param {number} [end=array.length] The end position.
  5359. * @returns {Array} Returns the cast slice.
  5360. */
  5361. function castSlice(array, start, end) {
  5362. var length = array.length;
  5363. end = end === undefined ? length : end;
  5364. return (!start && end >= length) ? array : baseSlice(array, start, end);
  5365. }
  5366. /**
  5367. * A simple wrapper around the global [`clearTimeout`](https://mdn.io/clearTimeout).
  5368. *
  5369. * @private
  5370. * @param {number|Object} id The timer id or timeout object of the timer to clear.
  5371. */
  5372. var clearTimeout = ctxClearTimeout || function(id) {
  5373. return root.clearTimeout(id);
  5374. };
  5375. /**
  5376. * Creates a clone of `buffer`.
  5377. *
  5378. * @private
  5379. * @param {Buffer} buffer The buffer to clone.
  5380. * @param {boolean} [isDeep] Specify a deep clone.
  5381. * @returns {Buffer} Returns the cloned buffer.
  5382. */
  5383. function cloneBuffer(buffer, isDeep) {
  5384. if (isDeep) {
  5385. return buffer.slice();
  5386. }
  5387. var length = buffer.length,
  5388. result = allocUnsafe ? allocUnsafe(length) : new buffer.constructor(length);
  5389. buffer.copy(result);
  5390. return result;
  5391. }
  5392. /**
  5393. * Creates a clone of `arrayBuffer`.
  5394. *
  5395. * @private
  5396. * @param {ArrayBuffer} arrayBuffer The array buffer to clone.
  5397. * @returns {ArrayBuffer} Returns the cloned array buffer.
  5398. */
  5399. function cloneArrayBuffer(arrayBuffer) {
  5400. var result = new arrayBuffer.constructor(arrayBuffer.byteLength);
  5401. new Uint8Array(result).set(new Uint8Array(arrayBuffer));
  5402. return result;
  5403. }
  5404. /**
  5405. * Creates a clone of `dataView`.
  5406. *
  5407. * @private
  5408. * @param {Object} dataView The data view to clone.
  5409. * @param {boolean} [isDeep] Specify a deep clone.
  5410. * @returns {Object} Returns the cloned data view.
  5411. */
  5412. function cloneDataView(dataView, isDeep) {
  5413. var buffer = isDeep ? cloneArrayBuffer(dataView.buffer) : dataView.buffer;
  5414. return new dataView.constructor(buffer, dataView.byteOffset, dataView.byteLength);
  5415. }
  5416. /**
  5417. * Creates a clone of `regexp`.
  5418. *
  5419. * @private
  5420. * @param {Object} regexp The regexp to clone.
  5421. * @returns {Object} Returns the cloned regexp.
  5422. */
  5423. function cloneRegExp(regexp) {
  5424. var result = new regexp.constructor(regexp.source, reFlags.exec(regexp));
  5425. result.lastIndex = regexp.lastIndex;
  5426. return result;
  5427. }
  5428. /**
  5429. * Creates a clone of the `symbol` object.
  5430. *
  5431. * @private
  5432. * @param {Object} symbol The symbol object to clone.
  5433. * @returns {Object} Returns the cloned symbol object.
  5434. */
  5435. function cloneSymbol(symbol) {
  5436. return symbolValueOf ? Object(symbolValueOf.call(symbol)) : {};
  5437. }
  5438. /**
  5439. * Creates a clone of `typedArray`.
  5440. *
  5441. * @private
  5442. * @param {Object} typedArray The typed array to clone.
  5443. * @param {boolean} [isDeep] Specify a deep clone.
  5444. * @returns {Object} Returns the cloned typed array.
  5445. */
  5446. function cloneTypedArray(typedArray, isDeep) {
  5447. var buffer = isDeep ? cloneArrayBuffer(typedArray.buffer) : typedArray.buffer;
  5448. return new typedArray.constructor(buffer, typedArray.byteOffset, typedArray.length);
  5449. }
  5450. /**
  5451. * Compares values to sort them in ascending order.
  5452. *
  5453. * @private
  5454. * @param {*} value The value to compare.
  5455. * @param {*} other The other value to compare.
  5456. * @returns {number} Returns the sort order indicator for `value`.
  5457. */
  5458. function compareAscending(value, other) {
  5459. if (value !== other) {
  5460. var valIsDefined = value !== undefined,
  5461. valIsNull = value === null,
  5462. valIsReflexive = value === value,
  5463. valIsSymbol = isSymbol(value);
  5464. var othIsDefined = other !== undefined,
  5465. othIsNull = other === null,
  5466. othIsReflexive = other === other,
  5467. othIsSymbol = isSymbol(other);
  5468. if ((!othIsNull && !othIsSymbol && !valIsSymbol && value > other) ||
  5469. (valIsSymbol && othIsDefined && othIsReflexive && !othIsNull && !othIsSymbol) ||
  5470. (valIsNull && othIsDefined && othIsReflexive) ||
  5471. (!valIsDefined && othIsReflexive) ||
  5472. !valIsReflexive) {
  5473. return 1;
  5474. }
  5475. if ((!valIsNull && !valIsSymbol && !othIsSymbol && value < other) ||
  5476. (othIsSymbol && valIsDefined && valIsReflexive && !valIsNull && !valIsSymbol) ||
  5477. (othIsNull && valIsDefined && valIsReflexive) ||
  5478. (!othIsDefined && valIsReflexive) ||
  5479. !othIsReflexive) {
  5480. return -1;
  5481. }
  5482. }
  5483. return 0;
  5484. }
  5485. /**
  5486. * Used by `_.orderBy` to compare multiple properties of a value to another
  5487. * and stable sort them.
  5488. *
  5489. * If `orders` is unspecified, all values are sorted in ascending order. Otherwise,
  5490. * specify an order of "desc" for descending or "asc" for ascending sort order
  5491. * of corresponding values.
  5492. *
  5493. * @private
  5494. * @param {Object} object The object to compare.
  5495. * @param {Object} other The other object to compare.
  5496. * @param {boolean[]|string[]} orders The order to sort by for each property.
  5497. * @returns {number} Returns the sort order indicator for `object`.
  5498. */
  5499. function compareMultiple(object, other, orders) {
  5500. var index = -1,
  5501. objCriteria = object.criteria,
  5502. othCriteria = other.criteria,
  5503. length = objCriteria.length,
  5504. ordersLength = orders.length;
  5505. while (++index < length) {
  5506. var result = compareAscending(objCriteria[index], othCriteria[index]);
  5507. if (result) {
  5508. if (index >= ordersLength) {
  5509. return result;
  5510. }
  5511. var order = orders[index];
  5512. return result * (order == 'desc' ? -1 : 1);
  5513. }
  5514. }
  5515. // Fixes an `Array#sort` bug in the JS engine embedded in Adobe applications
  5516. // that causes it, under certain circumstances, to provide the same value for
  5517. // `object` and `other`. See https://github.com/jashkenas/underscore/pull/1247
  5518. // for more details.
  5519. //
  5520. // This also ensures a stable sort in V8 and other engines.
  5521. // See https://bugs.chromium.org/p/v8/issues/detail?id=90 for more details.
  5522. return object.index - other.index;
  5523. }
  5524. /**
  5525. * Creates an array that is the composition of partially applied arguments,
  5526. * placeholders, and provided arguments into a single array of arguments.
  5527. *
  5528. * @private
  5529. * @param {Array} args The provided arguments.
  5530. * @param {Array} partials The arguments to prepend to those provided.
  5531. * @param {Array} holders The `partials` placeholder indexes.
  5532. * @params {boolean} [isCurried] Specify composing for a curried function.
  5533. * @returns {Array} Returns the new array of composed arguments.
  5534. */
  5535. function composeArgs(args, partials, holders, isCurried) {
  5536. var argsIndex = -1,
  5537. argsLength = args.length,
  5538. holdersLength = holders.length,
  5539. leftIndex = -1,
  5540. leftLength = partials.length,
  5541. rangeLength = nativeMax(argsLength - holdersLength, 0),
  5542. result = Array(leftLength + rangeLength),
  5543. isUncurried = !isCurried;
  5544. while (++leftIndex < leftLength) {
  5545. result[leftIndex] = partials[leftIndex];
  5546. }
  5547. while (++argsIndex < holdersLength) {
  5548. if (isUncurried || argsIndex < argsLength) {
  5549. result[holders[argsIndex]] = args[argsIndex];
  5550. }
  5551. }
  5552. while (rangeLength--) {
  5553. result[leftIndex++] = args[argsIndex++];
  5554. }
  5555. return result;
  5556. }
  5557. /**
  5558. * This function is like `composeArgs` except that the arguments composition
  5559. * is tailored for `_.partialRight`.
  5560. *
  5561. * @private
  5562. * @param {Array} args The provided arguments.
  5563. * @param {Array} partials The arguments to append to those provided.
  5564. * @param {Array} holders The `partials` placeholder indexes.
  5565. * @params {boolean} [isCurried] Specify composing for a curried function.
  5566. * @returns {Array} Returns the new array of composed arguments.
  5567. */
  5568. function composeArgsRight(args, partials, holders, isCurried) {
  5569. var argsIndex = -1,
  5570. argsLength = args.length,
  5571. holdersIndex = -1,
  5572. holdersLength = holders.length,
  5573. rightIndex = -1,
  5574. rightLength = partials.length,
  5575. rangeLength = nativeMax(argsLength - holdersLength, 0),
  5576. result = Array(rangeLength + rightLength),
  5577. isUncurried = !isCurried;
  5578. while (++argsIndex < rangeLength) {
  5579. result[argsIndex] = args[argsIndex];
  5580. }
  5581. var offset = argsIndex;
  5582. while (++rightIndex < rightLength) {
  5583. result[offset + rightIndex] = partials[rightIndex];
  5584. }
  5585. while (++holdersIndex < holdersLength) {
  5586. if (isUncurried || argsIndex < argsLength) {
  5587. result[offset + holders[holdersIndex]] = args[argsIndex++];
  5588. }
  5589. }
  5590. return result;
  5591. }
  5592. /**
  5593. * Copies the values of `source` to `array`.
  5594. *
  5595. * @private
  5596. * @param {Array} source The array to copy values from.
  5597. * @param {Array} [array=[]] The array to copy values to.
  5598. * @returns {Array} Returns `array`.
  5599. */
  5600. function copyArray(source, array) {
  5601. var index = -1,
  5602. length = source.length;
  5603. array || (array = Array(length));
  5604. while (++index < length) {
  5605. array[index] = source[index];
  5606. }
  5607. return array;
  5608. }
  5609. /**
  5610. * Copies properties of `source` to `object`.
  5611. *
  5612. * @private
  5613. * @param {Object} source The object to copy properties from.
  5614. * @param {Array} props The property identifiers to copy.
  5615. * @param {Object} [object={}] The object to copy properties to.
  5616. * @param {Function} [customizer] The function to customize copied values.
  5617. * @returns {Object} Returns `object`.
  5618. */
  5619. function copyObject(source, props, object, customizer) {
  5620. var isNew = !object;
  5621. object || (object = {});
  5622. var index = -1,
  5623. length = props.length;
  5624. while (++index < length) {
  5625. var key = props[index];
  5626. var newValue = customizer
  5627. ? customizer(object[key], source[key], key, object, source)
  5628. : undefined;
  5629. if (newValue === undefined) {
  5630. newValue = source[key];
  5631. }
  5632. if (isNew) {
  5633. baseAssignValue(object, key, newValue);
  5634. } else {
  5635. assignValue(object, key, newValue);
  5636. }
  5637. }
  5638. return object;
  5639. }
  5640. /**
  5641. * Copies own symbols of `source` to `object`.
  5642. *
  5643. * @private
  5644. * @param {Object} source The object to copy symbols from.
  5645. * @param {Object} [object={}] The object to copy symbols to.
  5646. * @returns {Object} Returns `object`.
  5647. */
  5648. function copySymbols(source, object) {
  5649. return copyObject(source, getSymbols(source), object);
  5650. }
  5651. /**
  5652. * Copies own and inherited symbols of `source` to `object`.
  5653. *
  5654. * @private
  5655. * @param {Object} source The object to copy symbols from.
  5656. * @param {Object} [object={}] The object to copy symbols to.
  5657. * @returns {Object} Returns `object`.
  5658. */
  5659. function copySymbolsIn(source, object) {
  5660. return copyObject(source, getSymbolsIn(source), object);
  5661. }
  5662. /**
  5663. * Creates a function like `_.groupBy`.
  5664. *
  5665. * @private
  5666. * @param {Function} setter The function to set accumulator values.
  5667. * @param {Function} [initializer] The accumulator object initializer.
  5668. * @returns {Function} Returns the new aggregator function.
  5669. */
  5670. function createAggregator(setter, initializer) {
  5671. return function(collection, iteratee) {
  5672. var func = isArray(collection) ? arrayAggregator : baseAggregator,
  5673. accumulator = initializer ? initializer() : {};
  5674. return func(collection, setter, getIteratee(iteratee, 2), accumulator);
  5675. };
  5676. }
  5677. /**
  5678. * Creates a function like `_.assign`.
  5679. *
  5680. * @private
  5681. * @param {Function} assigner The function to assign values.
  5682. * @returns {Function} Returns the new assigner function.
  5683. */
  5684. function createAssigner(assigner) {
  5685. return baseRest(function(object, sources) {
  5686. var index = -1,
  5687. length = sources.length,
  5688. customizer = length > 1 ? sources[length - 1] : undefined,
  5689. guard = length > 2 ? sources[2] : undefined;
  5690. customizer = (assigner.length > 3 && typeof customizer == 'function')
  5691. ? (length--, customizer)
  5692. : undefined;
  5693. if (guard && isIterateeCall(sources[0], sources[1], guard)) {
  5694. customizer = length < 3 ? undefined : customizer;
  5695. length = 1;
  5696. }
  5697. object = Object(object);
  5698. while (++index < length) {
  5699. var source = sources[index];
  5700. if (source) {
  5701. assigner(object, source, index, customizer);
  5702. }
  5703. }
  5704. return object;
  5705. });
  5706. }
  5707. /**
  5708. * Creates a `baseEach` or `baseEachRight` function.
  5709. *
  5710. * @private
  5711. * @param {Function} eachFunc The function to iterate over a collection.
  5712. * @param {boolean} [fromRight] Specify iterating from right to left.
  5713. * @returns {Function} Returns the new base function.
  5714. */
  5715. function createBaseEach(eachFunc, fromRight) {
  5716. return function(collection, iteratee) {
  5717. if (collection == null) {
  5718. return collection;
  5719. }
  5720. if (!isArrayLike(collection)) {
  5721. return eachFunc(collection, iteratee);
  5722. }
  5723. var length = collection.length,
  5724. index = fromRight ? length : -1,
  5725. iterable = Object(collection);
  5726. while ((fromRight ? index-- : ++index < length)) {
  5727. if (iteratee(iterable[index], index, iterable) === false) {
  5728. break;
  5729. }
  5730. }
  5731. return collection;
  5732. };
  5733. }
  5734. /**
  5735. * Creates a base function for methods like `_.forIn` and `_.forOwn`.
  5736. *
  5737. * @private
  5738. * @param {boolean} [fromRight] Specify iterating from right to left.
  5739. * @returns {Function} Returns the new base function.
  5740. */
  5741. function createBaseFor(fromRight) {
  5742. return function(object, iteratee, keysFunc) {
  5743. var index = -1,
  5744. iterable = Object(object),
  5745. props = keysFunc(object),
  5746. length = props.length;
  5747. while (length--) {
  5748. var key = props[fromRight ? length : ++index];
  5749. if (iteratee(iterable[key], key, iterable) === false) {
  5750. break;
  5751. }
  5752. }
  5753. return object;
  5754. };
  5755. }
  5756. /**
  5757. * Creates a function that wraps `func` to invoke it with the optional `this`
  5758. * binding of `thisArg`.
  5759. *
  5760. * @private
  5761. * @param {Function} func The function to wrap.
  5762. * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
  5763. * @param {*} [thisArg] The `this` binding of `func`.
  5764. * @returns {Function} Returns the new wrapped function.
  5765. */
  5766. function createBind(func, bitmask, thisArg) {
  5767. var isBind = bitmask & WRAP_BIND_FLAG,
  5768. Ctor = createCtor(func);
  5769. function wrapper() {
  5770. var fn = (this && this !== root && this instanceof wrapper) ? Ctor : func;
  5771. return fn.apply(isBind ? thisArg : this, arguments);
  5772. }
  5773. return wrapper;
  5774. }
  5775. /**
  5776. * Creates a function like `_.lowerFirst`.
  5777. *
  5778. * @private
  5779. * @param {string} methodName The name of the `String` case method to use.
  5780. * @returns {Function} Returns the new case function.
  5781. */
  5782. function createCaseFirst(methodName) {
  5783. return function(string) {
  5784. string = toString(string);
  5785. var strSymbols = hasUnicode(string)
  5786. ? stringToArray(string)
  5787. : undefined;
  5788. var chr = strSymbols
  5789. ? strSymbols[0]
  5790. : string.charAt(0);
  5791. var trailing = strSymbols
  5792. ? castSlice(strSymbols, 1).join('')
  5793. : string.slice(1);
  5794. return chr[methodName]() + trailing;
  5795. };
  5796. }
  5797. /**
  5798. * Creates a function like `_.camelCase`.
  5799. *
  5800. * @private
  5801. * @param {Function} callback The function to combine each word.
  5802. * @returns {Function} Returns the new compounder function.
  5803. */
  5804. function createCompounder(callback) {
  5805. return function(string) {
  5806. return arrayReduce(words(deburr(string).replace(reApos, '')), callback, '');
  5807. };
  5808. }
  5809. /**
  5810. * Creates a function that produces an instance of `Ctor` regardless of
  5811. * whether it was invoked as part of a `new` expression or by `call` or `apply`.
  5812. *
  5813. * @private
  5814. * @param {Function} Ctor The constructor to wrap.
  5815. * @returns {Function} Returns the new wrapped function.
  5816. */
  5817. function createCtor(Ctor) {
  5818. return function() {
  5819. // Use a `switch` statement to work with class constructors. See
  5820. // http://ecma-international.org/ecma-262/7.0/#sec-ecmascript-function-objects-call-thisargument-argumentslist
  5821. // for more details.
  5822. var args = arguments;
  5823. switch (args.length) {
  5824. case 0: return new Ctor;
  5825. case 1: return new Ctor(args[0]);
  5826. case 2: return new Ctor(args[0], args[1]);
  5827. case 3: return new Ctor(args[0], args[1], args[2]);
  5828. case 4: return new Ctor(args[0], args[1], args[2], args[3]);
  5829. case 5: return new Ctor(args[0], args[1], args[2], args[3], args[4]);
  5830. case 6: return new Ctor(args[0], args[1], args[2], args[3], args[4], args[5]);
  5831. case 7: return new Ctor(args[0], args[1], args[2], args[3], args[4], args[5], args[6]);
  5832. }
  5833. var thisBinding = baseCreate(Ctor.prototype),
  5834. result = Ctor.apply(thisBinding, args);
  5835. // Mimic the constructor's `return` behavior.
  5836. // See https://es5.github.io/#x13.2.2 for more details.
  5837. return isObject(result) ? result : thisBinding;
  5838. };
  5839. }
  5840. /**
  5841. * Creates a function that wraps `func` to enable currying.
  5842. *
  5843. * @private
  5844. * @param {Function} func The function to wrap.
  5845. * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
  5846. * @param {number} arity The arity of `func`.
  5847. * @returns {Function} Returns the new wrapped function.
  5848. */
  5849. function createCurry(func, bitmask, arity) {
  5850. var Ctor = createCtor(func);
  5851. function wrapper() {
  5852. var length = arguments.length,
  5853. args = Array(length),
  5854. index = length,
  5855. placeholder = getHolder(wrapper);
  5856. while (index--) {
  5857. args[index] = arguments[index];
  5858. }
  5859. var holders = (length < 3 && args[0] !== placeholder && args[length - 1] !== placeholder)
  5860. ? []
  5861. : replaceHolders(args, placeholder);
  5862. length -= holders.length;
  5863. if (length < arity) {
  5864. return createRecurry(
  5865. func, bitmask, createHybrid, wrapper.placeholder, undefined,
  5866. args, holders, undefined, undefined, arity - length);
  5867. }
  5868. var fn = (this && this !== root && this instanceof wrapper) ? Ctor : func;
  5869. return apply(fn, this, args);
  5870. }
  5871. return wrapper;
  5872. }
  5873. /**
  5874. * Creates a `_.find` or `_.findLast` function.
  5875. *
  5876. * @private
  5877. * @param {Function} findIndexFunc The function to find the collection index.
  5878. * @returns {Function} Returns the new find function.
  5879. */
  5880. function createFind(findIndexFunc) {
  5881. return function(collection, predicate, fromIndex) {
  5882. var iterable = Object(collection);
  5883. if (!isArrayLike(collection)) {
  5884. var iteratee = getIteratee(predicate, 3);
  5885. collection = keys(collection);
  5886. predicate = function(key) { return iteratee(iterable[key], key, iterable); };
  5887. }
  5888. var index = findIndexFunc(collection, predicate, fromIndex);
  5889. return index > -1 ? iterable[iteratee ? collection[index] : index] : undefined;
  5890. };
  5891. }
  5892. /**
  5893. * Creates a `_.flow` or `_.flowRight` function.
  5894. *
  5895. * @private
  5896. * @param {boolean} [fromRight] Specify iterating from right to left.
  5897. * @returns {Function} Returns the new flow function.
  5898. */
  5899. function createFlow(fromRight) {
  5900. return flatRest(function(funcs) {
  5901. var length = funcs.length,
  5902. index = length,
  5903. prereq = LodashWrapper.prototype.thru;
  5904. if (fromRight) {
  5905. funcs.reverse();
  5906. }
  5907. while (index--) {
  5908. var func = funcs[index];
  5909. if (typeof func != 'function') {
  5910. throw new TypeError(FUNC_ERROR_TEXT);
  5911. }
  5912. if (prereq && !wrapper && getFuncName(func) == 'wrapper') {
  5913. var wrapper = new LodashWrapper([], true);
  5914. }
  5915. }
  5916. index = wrapper ? index : length;
  5917. while (++index < length) {
  5918. func = funcs[index];
  5919. var funcName = getFuncName(func),
  5920. data = funcName == 'wrapper' ? getData(func) : undefined;
  5921. if (data && isLaziable(data[0]) &&
  5922. data[1] == (WRAP_ARY_FLAG | WRAP_CURRY_FLAG | WRAP_PARTIAL_FLAG | WRAP_REARG_FLAG) &&
  5923. !data[4].length && data[9] == 1
  5924. ) {
  5925. wrapper = wrapper[getFuncName(data[0])].apply(wrapper, data[3]);
  5926. } else {
  5927. wrapper = (func.length == 1 && isLaziable(func))
  5928. ? wrapper[funcName]()
  5929. : wrapper.thru(func);
  5930. }
  5931. }
  5932. return function() {
  5933. var args = arguments,
  5934. value = args[0];
  5935. if (wrapper && args.length == 1 && isArray(value)) {
  5936. return wrapper.plant(value).value();
  5937. }
  5938. var index = 0,
  5939. result = length ? funcs[index].apply(this, args) : value;
  5940. while (++index < length) {
  5941. result = funcs[index].call(this, result);
  5942. }
  5943. return result;
  5944. };
  5945. });
  5946. }
  5947. /**
  5948. * Creates a function that wraps `func` to invoke it with optional `this`
  5949. * binding of `thisArg`, partial application, and currying.
  5950. *
  5951. * @private
  5952. * @param {Function|string} func The function or method name to wrap.
  5953. * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
  5954. * @param {*} [thisArg] The `this` binding of `func`.
  5955. * @param {Array} [partials] The arguments to prepend to those provided to
  5956. * the new function.
  5957. * @param {Array} [holders] The `partials` placeholder indexes.
  5958. * @param {Array} [partialsRight] The arguments to append to those provided
  5959. * to the new function.
  5960. * @param {Array} [holdersRight] The `partialsRight` placeholder indexes.
  5961. * @param {Array} [argPos] The argument positions of the new function.
  5962. * @param {number} [ary] The arity cap of `func`.
  5963. * @param {number} [arity] The arity of `func`.
  5964. * @returns {Function} Returns the new wrapped function.
  5965. */
  5966. function createHybrid(func, bitmask, thisArg, partials, holders, partialsRight, holdersRight, argPos, ary, arity) {
  5967. var isAry = bitmask & WRAP_ARY_FLAG,
  5968. isBind = bitmask & WRAP_BIND_FLAG,
  5969. isBindKey = bitmask & WRAP_BIND_KEY_FLAG,
  5970. isCurried = bitmask & (WRAP_CURRY_FLAG | WRAP_CURRY_RIGHT_FLAG),
  5971. isFlip = bitmask & WRAP_FLIP_FLAG,
  5972. Ctor = isBindKey ? undefined : createCtor(func);
  5973. function wrapper() {
  5974. var length = arguments.length,
  5975. args = Array(length),
  5976. index = length;
  5977. while (index--) {
  5978. args[index] = arguments[index];
  5979. }
  5980. if (isCurried) {
  5981. var placeholder = getHolder(wrapper),
  5982. holdersCount = countHolders(args, placeholder);
  5983. }
  5984. if (partials) {
  5985. args = composeArgs(args, partials, holders, isCurried);
  5986. }
  5987. if (partialsRight) {
  5988. args = composeArgsRight(args, partialsRight, holdersRight, isCurried);
  5989. }
  5990. length -= holdersCount;
  5991. if (isCurried && length < arity) {
  5992. var newHolders = replaceHolders(args, placeholder);
  5993. return createRecurry(
  5994. func, bitmask, createHybrid, wrapper.placeholder, thisArg,
  5995. args, newHolders, argPos, ary, arity - length
  5996. );
  5997. }
  5998. var thisBinding = isBind ? thisArg : this,
  5999. fn = isBindKey ? thisBinding[func] : func;
  6000. length = args.length;
  6001. if (argPos) {
  6002. args = reorder(args, argPos);
  6003. } else if (isFlip && length > 1) {
  6004. args.reverse();
  6005. }
  6006. if (isAry && ary < length) {
  6007. args.length = ary;
  6008. }
  6009. if (this && this !== root && this instanceof wrapper) {
  6010. fn = Ctor || createCtor(fn);
  6011. }
  6012. return fn.apply(thisBinding, args);
  6013. }
  6014. return wrapper;
  6015. }
  6016. /**
  6017. * Creates a function like `_.invertBy`.
  6018. *
  6019. * @private
  6020. * @param {Function} setter The function to set accumulator values.
  6021. * @param {Function} toIteratee The function to resolve iteratees.
  6022. * @returns {Function} Returns the new inverter function.
  6023. */
  6024. function createInverter(setter, toIteratee) {
  6025. return function(object, iteratee) {
  6026. return baseInverter(object, setter, toIteratee(iteratee), {});
  6027. };
  6028. }
  6029. /**
  6030. * Creates a function that performs a mathematical operation on two values.
  6031. *
  6032. * @private
  6033. * @param {Function} operator The function to perform the operation.
  6034. * @param {number} [defaultValue] The value used for `undefined` arguments.
  6035. * @returns {Function} Returns the new mathematical operation function.
  6036. */
  6037. function createMathOperation(operator, defaultValue) {
  6038. return function(value, other) {
  6039. var result;
  6040. if (value === undefined && other === undefined) {
  6041. return defaultValue;
  6042. }
  6043. if (value !== undefined) {
  6044. result = value;
  6045. }
  6046. if (other !== undefined) {
  6047. if (result === undefined) {
  6048. return other;
  6049. }
  6050. if (typeof value == 'string' || typeof other == 'string') {
  6051. value = baseToString(value);
  6052. other = baseToString(other);
  6053. } else {
  6054. value = baseToNumber(value);
  6055. other = baseToNumber(other);
  6056. }
  6057. result = operator(value, other);
  6058. }
  6059. return result;
  6060. };
  6061. }
  6062. /**
  6063. * Creates a function like `_.over`.
  6064. *
  6065. * @private
  6066. * @param {Function} arrayFunc The function to iterate over iteratees.
  6067. * @returns {Function} Returns the new over function.
  6068. */
  6069. function createOver(arrayFunc) {
  6070. return flatRest(function(iteratees) {
  6071. iteratees = arrayMap(iteratees, baseUnary(getIteratee()));
  6072. return baseRest(function(args) {
  6073. var thisArg = this;
  6074. return arrayFunc(iteratees, function(iteratee) {
  6075. return apply(iteratee, thisArg, args);
  6076. });
  6077. });
  6078. });
  6079. }
  6080. /**
  6081. * Creates the padding for `string` based on `length`. The `chars` string
  6082. * is truncated if the number of characters exceeds `length`.
  6083. *
  6084. * @private
  6085. * @param {number} length The padding length.
  6086. * @param {string} [chars=' '] The string used as padding.
  6087. * @returns {string} Returns the padding for `string`.
  6088. */
  6089. function createPadding(length, chars) {
  6090. chars = chars === undefined ? ' ' : baseToString(chars);
  6091. var charsLength = chars.length;
  6092. if (charsLength < 2) {
  6093. return charsLength ? baseRepeat(chars, length) : chars;
  6094. }
  6095. var result = baseRepeat(chars, nativeCeil(length / stringSize(chars)));
  6096. return hasUnicode(chars)
  6097. ? castSlice(stringToArray(result), 0, length).join('')
  6098. : result.slice(0, length);
  6099. }
  6100. /**
  6101. * Creates a function that wraps `func` to invoke it with the `this` binding
  6102. * of `thisArg` and `partials` prepended to the arguments it receives.
  6103. *
  6104. * @private
  6105. * @param {Function} func The function to wrap.
  6106. * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
  6107. * @param {*} thisArg The `this` binding of `func`.
  6108. * @param {Array} partials The arguments to prepend to those provided to
  6109. * the new function.
  6110. * @returns {Function} Returns the new wrapped function.
  6111. */
  6112. function createPartial(func, bitmask, thisArg, partials) {
  6113. var isBind = bitmask & WRAP_BIND_FLAG,
  6114. Ctor = createCtor(func);
  6115. function wrapper() {
  6116. var argsIndex = -1,
  6117. argsLength = arguments.length,
  6118. leftIndex = -1,
  6119. leftLength = partials.length,
  6120. args = Array(leftLength + argsLength),
  6121. fn = (this && this !== root && this instanceof wrapper) ? Ctor : func;
  6122. while (++leftIndex < leftLength) {
  6123. args[leftIndex] = partials[leftIndex];
  6124. }
  6125. while (argsLength--) {
  6126. args[leftIndex++] = arguments[++argsIndex];
  6127. }
  6128. return apply(fn, isBind ? thisArg : this, args);
  6129. }
  6130. return wrapper;
  6131. }
  6132. /**
  6133. * Creates a `_.range` or `_.rangeRight` function.
  6134. *
  6135. * @private
  6136. * @param {boolean} [fromRight] Specify iterating from right to left.
  6137. * @returns {Function} Returns the new range function.
  6138. */
  6139. function createRange(fromRight) {
  6140. return function(start, end, step) {
  6141. if (step && typeof step != 'number' && isIterateeCall(start, end, step)) {
  6142. end = step = undefined;
  6143. }
  6144. // Ensure the sign of `-0` is preserved.
  6145. start = toFinite(start);
  6146. if (end === undefined) {
  6147. end = start;
  6148. start = 0;
  6149. } else {
  6150. end = toFinite(end);
  6151. }
  6152. step = step === undefined ? (start < end ? 1 : -1) : toFinite(step);
  6153. return baseRange(start, end, step, fromRight);
  6154. };
  6155. }
  6156. /**
  6157. * Creates a function that performs a relational operation on two values.
  6158. *
  6159. * @private
  6160. * @param {Function} operator The function to perform the operation.
  6161. * @returns {Function} Returns the new relational operation function.
  6162. */
  6163. function createRelationalOperation(operator) {
  6164. return function(value, other) {
  6165. if (!(typeof value == 'string' && typeof other == 'string')) {
  6166. value = toNumber(value);
  6167. other = toNumber(other);
  6168. }
  6169. return operator(value, other);
  6170. };
  6171. }
  6172. /**
  6173. * Creates a function that wraps `func` to continue currying.
  6174. *
  6175. * @private
  6176. * @param {Function} func The function to wrap.
  6177. * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
  6178. * @param {Function} wrapFunc The function to create the `func` wrapper.
  6179. * @param {*} placeholder The placeholder value.
  6180. * @param {*} [thisArg] The `this` binding of `func`.
  6181. * @param {Array} [partials] The arguments to prepend to those provided to
  6182. * the new function.
  6183. * @param {Array} [holders] The `partials` placeholder indexes.
  6184. * @param {Array} [argPos] The argument positions of the new function.
  6185. * @param {number} [ary] The arity cap of `func`.
  6186. * @param {number} [arity] The arity of `func`.
  6187. * @returns {Function} Returns the new wrapped function.
  6188. */
  6189. function createRecurry(func, bitmask, wrapFunc, placeholder, thisArg, partials, holders, argPos, ary, arity) {
  6190. var isCurry = bitmask & WRAP_CURRY_FLAG,
  6191. newHolders = isCurry ? holders : undefined,
  6192. newHoldersRight = isCurry ? undefined : holders,
  6193. newPartials = isCurry ? partials : undefined,
  6194. newPartialsRight = isCurry ? undefined : partials;
  6195. bitmask |= (isCurry ? WRAP_PARTIAL_FLAG : WRAP_PARTIAL_RIGHT_FLAG);
  6196. bitmask &= ~(isCurry ? WRAP_PARTIAL_RIGHT_FLAG : WRAP_PARTIAL_FLAG);
  6197. if (!(bitmask & WRAP_CURRY_BOUND_FLAG)) {
  6198. bitmask &= ~(WRAP_BIND_FLAG | WRAP_BIND_KEY_FLAG);
  6199. }
  6200. var newData = [
  6201. func, bitmask, thisArg, newPartials, newHolders, newPartialsRight,
  6202. newHoldersRight, argPos, ary, arity
  6203. ];
  6204. var result = wrapFunc.apply(undefined, newData);
  6205. if (isLaziable(func)) {
  6206. setData(result, newData);
  6207. }
  6208. result.placeholder = placeholder;
  6209. return setWrapToString(result, func, bitmask);
  6210. }
  6211. /**
  6212. * Creates a function like `_.round`.
  6213. *
  6214. * @private
  6215. * @param {string} methodName The name of the `Math` method to use when rounding.
  6216. * @returns {Function} Returns the new round function.
  6217. */
  6218. function createRound(methodName) {
  6219. var func = Math[methodName];
  6220. return function(number, precision) {
  6221. number = toNumber(number);
  6222. precision = precision == null ? 0 : nativeMin(toInteger(precision), 292);
  6223. if (precision) {
  6224. // Shift with exponential notation to avoid floating-point issues.
  6225. // See [MDN](https://mdn.io/round#Examples) for more details.
  6226. var pair = (toString(number) + 'e').split('e'),
  6227. value = func(pair[0] + 'e' + (+pair[1] + precision));
  6228. pair = (toString(value) + 'e').split('e');
  6229. return +(pair[0] + 'e' + (+pair[1] - precision));
  6230. }
  6231. return func(number);
  6232. };
  6233. }
  6234. /**
  6235. * Creates a set object of `values`.
  6236. *
  6237. * @private
  6238. * @param {Array} values The values to add to the set.
  6239. * @returns {Object} Returns the new set.
  6240. */
  6241. var createSet = !(Set && (1 / setToArray(new Set([,-0]))[1]) == INFINITY) ? noop : function(values) {
  6242. return new Set(values);
  6243. };
  6244. /**
  6245. * Creates a `_.toPairs` or `_.toPairsIn` function.
  6246. *
  6247. * @private
  6248. * @param {Function} keysFunc The function to get the keys of a given object.
  6249. * @returns {Function} Returns the new pairs function.
  6250. */
  6251. function createToPairs(keysFunc) {
  6252. return function(object) {
  6253. var tag = getTag(object);
  6254. if (tag == mapTag) {
  6255. return mapToArray(object);
  6256. }
  6257. if (tag == setTag) {
  6258. return setToPairs(object);
  6259. }
  6260. return baseToPairs(object, keysFunc(object));
  6261. };
  6262. }
  6263. /**
  6264. * Creates a function that either curries or invokes `func` with optional
  6265. * `this` binding and partially applied arguments.
  6266. *
  6267. * @private
  6268. * @param {Function|string} func The function or method name to wrap.
  6269. * @param {number} bitmask The bitmask flags.
  6270. * 1 - `_.bind`
  6271. * 2 - `_.bindKey`
  6272. * 4 - `_.curry` or `_.curryRight` of a bound function
  6273. * 8 - `_.curry`
  6274. * 16 - `_.curryRight`
  6275. * 32 - `_.partial`
  6276. * 64 - `_.partialRight`
  6277. * 128 - `_.rearg`
  6278. * 256 - `_.ary`
  6279. * 512 - `_.flip`
  6280. * @param {*} [thisArg] The `this` binding of `func`.
  6281. * @param {Array} [partials] The arguments to be partially applied.
  6282. * @param {Array} [holders] The `partials` placeholder indexes.
  6283. * @param {Array} [argPos] The argument positions of the new function.
  6284. * @param {number} [ary] The arity cap of `func`.
  6285. * @param {number} [arity] The arity of `func`.
  6286. * @returns {Function} Returns the new wrapped function.
  6287. */
  6288. function createWrap(func, bitmask, thisArg, partials, holders, argPos, ary, arity) {
  6289. var isBindKey = bitmask & WRAP_BIND_KEY_FLAG;
  6290. if (!isBindKey && typeof func != 'function') {
  6291. throw new TypeError(FUNC_ERROR_TEXT);
  6292. }
  6293. var length = partials ? partials.length : 0;
  6294. if (!length) {
  6295. bitmask &= ~(WRAP_PARTIAL_FLAG | WRAP_PARTIAL_RIGHT_FLAG);
  6296. partials = holders = undefined;
  6297. }
  6298. ary = ary === undefined ? ary : nativeMax(toInteger(ary), 0);
  6299. arity = arity === undefined ? arity : toInteger(arity);
  6300. length -= holders ? holders.length : 0;
  6301. if (bitmask & WRAP_PARTIAL_RIGHT_FLAG) {
  6302. var partialsRight = partials,
  6303. holdersRight = holders;
  6304. partials = holders = undefined;
  6305. }
  6306. var data = isBindKey ? undefined : getData(func);
  6307. var newData = [
  6308. func, bitmask, thisArg, partials, holders, partialsRight, holdersRight,
  6309. argPos, ary, arity
  6310. ];
  6311. if (data) {
  6312. mergeData(newData, data);
  6313. }
  6314. func = newData[0];
  6315. bitmask = newData[1];
  6316. thisArg = newData[2];
  6317. partials = newData[3];
  6318. holders = newData[4];
  6319. arity = newData[9] = newData[9] === undefined
  6320. ? (isBindKey ? 0 : func.length)
  6321. : nativeMax(newData[9] - length, 0);
  6322. if (!arity && bitmask & (WRAP_CURRY_FLAG | WRAP_CURRY_RIGHT_FLAG)) {
  6323. bitmask &= ~(WRAP_CURRY_FLAG | WRAP_CURRY_RIGHT_FLAG);
  6324. }
  6325. if (!bitmask || bitmask == WRAP_BIND_FLAG) {
  6326. var result = createBind(func, bitmask, thisArg);
  6327. } else if (bitmask == WRAP_CURRY_FLAG || bitmask == WRAP_CURRY_RIGHT_FLAG) {
  6328. result = createCurry(func, bitmask, arity);
  6329. } else if ((bitmask == WRAP_PARTIAL_FLAG || bitmask == (WRAP_BIND_FLAG | WRAP_PARTIAL_FLAG)) && !holders.length) {
  6330. result = createPartial(func, bitmask, thisArg, partials);
  6331. } else {
  6332. result = createHybrid.apply(undefined, newData);
  6333. }
  6334. var setter = data ? baseSetData : setData;
  6335. return setWrapToString(setter(result, newData), func, bitmask);
  6336. }
  6337. /**
  6338. * Used by `_.defaults` to customize its `_.assignIn` use to assign properties
  6339. * of source objects to the destination object for all destination properties
  6340. * that resolve to `undefined`.
  6341. *
  6342. * @private
  6343. * @param {*} objValue The destination value.
  6344. * @param {*} srcValue The source value.
  6345. * @param {string} key The key of the property to assign.
  6346. * @param {Object} object The parent object of `objValue`.
  6347. * @returns {*} Returns the value to assign.
  6348. */
  6349. function customDefaultsAssignIn(objValue, srcValue, key, object) {
  6350. if (objValue === undefined ||
  6351. (eq(objValue, objectProto[key]) && !hasOwnProperty.call(object, key))) {
  6352. return srcValue;
  6353. }
  6354. return objValue;
  6355. }
  6356. /**
  6357. * Used by `_.defaultsDeep` to customize its `_.merge` use to merge source
  6358. * objects into destination objects that are passed thru.
  6359. *
  6360. * @private
  6361. * @param {*} objValue The destination value.
  6362. * @param {*} srcValue The source value.
  6363. * @param {string} key The key of the property to merge.
  6364. * @param {Object} object The parent object of `objValue`.
  6365. * @param {Object} source The parent object of `srcValue`.
  6366. * @param {Object} [stack] Tracks traversed source values and their merged
  6367. * counterparts.
  6368. * @returns {*} Returns the value to assign.
  6369. */
  6370. function customDefaultsMerge(objValue, srcValue, key, object, source, stack) {
  6371. if (isObject(objValue) && isObject(srcValue)) {
  6372. // Recursively merge objects and arrays (susceptible to call stack limits).
  6373. stack.set(srcValue, objValue);
  6374. baseMerge(objValue, srcValue, undefined, customDefaultsMerge, stack);
  6375. stack['delete'](srcValue);
  6376. }
  6377. return objValue;
  6378. }
  6379. /**
  6380. * Used by `_.omit` to customize its `_.cloneDeep` use to only clone plain
  6381. * objects.
  6382. *
  6383. * @private
  6384. * @param {*} value The value to inspect.
  6385. * @param {string} key The key of the property to inspect.
  6386. * @returns {*} Returns the uncloned value or `undefined` to defer cloning to `_.cloneDeep`.
  6387. */
  6388. function customOmitClone(value) {
  6389. return isPlainObject(value) ? undefined : value;
  6390. }
  6391. /**
  6392. * A specialized version of `baseIsEqualDeep` for arrays with support for
  6393. * partial deep comparisons.
  6394. *
  6395. * @private
  6396. * @param {Array} array The array to compare.
  6397. * @param {Array} other The other array to compare.
  6398. * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.
  6399. * @param {Function} customizer The function to customize comparisons.
  6400. * @param {Function} equalFunc The function to determine equivalents of values.
  6401. * @param {Object} stack Tracks traversed `array` and `other` objects.
  6402. * @returns {boolean} Returns `true` if the arrays are equivalent, else `false`.
  6403. */
  6404. function equalArrays(array, other, bitmask, customizer, equalFunc, stack) {
  6405. var isPartial = bitmask & COMPARE_PARTIAL_FLAG,
  6406. arrLength = array.length,
  6407. othLength = other.length;
  6408. if (arrLength != othLength && !(isPartial && othLength > arrLength)) {
  6409. return false;
  6410. }
  6411. // Assume cyclic values are equal.
  6412. var stacked = stack.get(array);
  6413. if (stacked && stack.get(other)) {
  6414. return stacked == other;
  6415. }
  6416. var index = -1,
  6417. result = true,
  6418. seen = (bitmask & COMPARE_UNORDERED_FLAG) ? new SetCache : undefined;
  6419. stack.set(array, other);
  6420. stack.set(other, array);
  6421. // Ignore non-index properties.
  6422. while (++index < arrLength) {
  6423. var arrValue = array[index],
  6424. othValue = other[index];
  6425. if (customizer) {
  6426. var compared = isPartial
  6427. ? customizer(othValue, arrValue, index, other, array, stack)
  6428. : customizer(arrValue, othValue, index, array, other, stack);
  6429. }
  6430. if (compared !== undefined) {
  6431. if (compared) {
  6432. continue;
  6433. }
  6434. result = false;
  6435. break;
  6436. }
  6437. // Recursively compare arrays (susceptible to call stack limits).
  6438. if (seen) {
  6439. if (!arraySome(other, function(othValue, othIndex) {
  6440. if (!cacheHas(seen, othIndex) &&
  6441. (arrValue === othValue || equalFunc(arrValue, othValue, bitmask, customizer, stack))) {
  6442. return seen.push(othIndex);
  6443. }
  6444. })) {
  6445. result = false;
  6446. break;
  6447. }
  6448. } else if (!(
  6449. arrValue === othValue ||
  6450. equalFunc(arrValue, othValue, bitmask, customizer, stack)
  6451. )) {
  6452. result = false;
  6453. break;
  6454. }
  6455. }
  6456. stack['delete'](array);
  6457. stack['delete'](other);
  6458. return result;
  6459. }
  6460. /**
  6461. * A specialized version of `baseIsEqualDeep` for comparing objects of
  6462. * the same `toStringTag`.
  6463. *
  6464. * **Note:** This function only supports comparing values with tags of
  6465. * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`.
  6466. *
  6467. * @private
  6468. * @param {Object} object The object to compare.
  6469. * @param {Object} other The other object to compare.
  6470. * @param {string} tag The `toStringTag` of the objects to compare.
  6471. * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.
  6472. * @param {Function} customizer The function to customize comparisons.
  6473. * @param {Function} equalFunc The function to determine equivalents of values.
  6474. * @param {Object} stack Tracks traversed `object` and `other` objects.
  6475. * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
  6476. */
  6477. function equalByTag(object, other, tag, bitmask, customizer, equalFunc, stack) {
  6478. switch (tag) {
  6479. case dataViewTag:
  6480. if ((object.byteLength != other.byteLength) ||
  6481. (object.byteOffset != other.byteOffset)) {
  6482. return false;
  6483. }
  6484. object = object.buffer;
  6485. other = other.buffer;
  6486. case arrayBufferTag:
  6487. if ((object.byteLength != other.byteLength) ||
  6488. !equalFunc(new Uint8Array(object), new Uint8Array(other))) {
  6489. return false;
  6490. }
  6491. return true;
  6492. case boolTag:
  6493. case dateTag:
  6494. case numberTag:
  6495. // Coerce booleans to `1` or `0` and dates to milliseconds.
  6496. // Invalid dates are coerced to `NaN`.
  6497. return eq(+object, +other);
  6498. case errorTag:
  6499. return object.name == other.name && object.message == other.message;
  6500. case regexpTag:
  6501. case stringTag:
  6502. // Coerce regexes to strings and treat strings, primitives and objects,
  6503. // as equal. See http://www.ecma-international.org/ecma-262/7.0/#sec-regexp.prototype.tostring
  6504. // for more details.
  6505. return object == (other + '');
  6506. case mapTag:
  6507. var convert = mapToArray;
  6508. case setTag:
  6509. var isPartial = bitmask & COMPARE_PARTIAL_FLAG;
  6510. convert || (convert = setToArray);
  6511. if (object.size != other.size && !isPartial) {
  6512. return false;
  6513. }
  6514. // Assume cyclic values are equal.
  6515. var stacked = stack.get(object);
  6516. if (stacked) {
  6517. return stacked == other;
  6518. }
  6519. bitmask |= COMPARE_UNORDERED_FLAG;
  6520. // Recursively compare objects (susceptible to call stack limits).
  6521. stack.set(object, other);
  6522. var result = equalArrays(convert(object), convert(other), bitmask, customizer, equalFunc, stack);
  6523. stack['delete'](object);
  6524. return result;
  6525. case symbolTag:
  6526. if (symbolValueOf) {
  6527. return symbolValueOf.call(object) == symbolValueOf.call(other);
  6528. }
  6529. }
  6530. return false;
  6531. }
  6532. /**
  6533. * A specialized version of `baseIsEqualDeep` for objects with support for
  6534. * partial deep comparisons.
  6535. *
  6536. * @private
  6537. * @param {Object} object The object to compare.
  6538. * @param {Object} other The other object to compare.
  6539. * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.
  6540. * @param {Function} customizer The function to customize comparisons.
  6541. * @param {Function} equalFunc The function to determine equivalents of values.
  6542. * @param {Object} stack Tracks traversed `object` and `other` objects.
  6543. * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
  6544. */
  6545. function equalObjects(object, other, bitmask, customizer, equalFunc, stack) {
  6546. var isPartial = bitmask & COMPARE_PARTIAL_FLAG,
  6547. objProps = getAllKeys(object),
  6548. objLength = objProps.length,
  6549. othProps = getAllKeys(other),
  6550. othLength = othProps.length;
  6551. if (objLength != othLength && !isPartial) {
  6552. return false;
  6553. }
  6554. var index = objLength;
  6555. while (index--) {
  6556. var key = objProps[index];
  6557. if (!(isPartial ? key in other : hasOwnProperty.call(other, key))) {
  6558. return false;
  6559. }
  6560. }
  6561. // Assume cyclic values are equal.
  6562. var stacked = stack.get(object);
  6563. if (stacked && stack.get(other)) {
  6564. return stacked == other;
  6565. }
  6566. var result = true;
  6567. stack.set(object, other);
  6568. stack.set(other, object);
  6569. var skipCtor = isPartial;
  6570. while (++index < objLength) {
  6571. key = objProps[index];
  6572. var objValue = object[key],
  6573. othValue = other[key];
  6574. if (customizer) {
  6575. var compared = isPartial
  6576. ? customizer(othValue, objValue, key, other, object, stack)
  6577. : customizer(objValue, othValue, key, object, other, stack);
  6578. }
  6579. // Recursively compare objects (susceptible to call stack limits).
  6580. if (!(compared === undefined
  6581. ? (objValue === othValue || equalFunc(objValue, othValue, bitmask, customizer, stack))
  6582. : compared
  6583. )) {
  6584. result = false;
  6585. break;
  6586. }
  6587. skipCtor || (skipCtor = key == 'constructor');
  6588. }
  6589. if (result && !skipCtor) {
  6590. var objCtor = object.constructor,
  6591. othCtor = other.constructor;
  6592. // Non `Object` object instances with different constructors are not equal.
  6593. if (objCtor != othCtor &&
  6594. ('constructor' in object && 'constructor' in other) &&
  6595. !(typeof objCtor == 'function' && objCtor instanceof objCtor &&
  6596. typeof othCtor == 'function' && othCtor instanceof othCtor)) {
  6597. result = false;
  6598. }
  6599. }
  6600. stack['delete'](object);
  6601. stack['delete'](other);
  6602. return result;
  6603. }
  6604. /**
  6605. * A specialized version of `baseRest` which flattens the rest array.
  6606. *
  6607. * @private
  6608. * @param {Function} func The function to apply a rest parameter to.
  6609. * @returns {Function} Returns the new function.
  6610. */
  6611. function flatRest(func) {
  6612. return setToString(overRest(func, undefined, flatten), func + '');
  6613. }
  6614. /**
  6615. * Creates an array of own enumerable property names and symbols of `object`.
  6616. *
  6617. * @private
  6618. * @param {Object} object The object to query.
  6619. * @returns {Array} Returns the array of property names and symbols.
  6620. */
  6621. function getAllKeys(object) {
  6622. return baseGetAllKeys(object, keys, getSymbols);
  6623. }
  6624. /**
  6625. * Creates an array of own and inherited enumerable property names and
  6626. * symbols of `object`.
  6627. *
  6628. * @private
  6629. * @param {Object} object The object to query.
  6630. * @returns {Array} Returns the array of property names and symbols.
  6631. */
  6632. function getAllKeysIn(object) {
  6633. return baseGetAllKeys(object, keysIn, getSymbolsIn);
  6634. }
  6635. /**
  6636. * Gets metadata for `func`.
  6637. *
  6638. * @private
  6639. * @param {Function} func The function to query.
  6640. * @returns {*} Returns the metadata for `func`.
  6641. */
  6642. var getData = !metaMap ? noop : function(func) {
  6643. return metaMap.get(func);
  6644. };
  6645. /**
  6646. * Gets the name of `func`.
  6647. *
  6648. * @private
  6649. * @param {Function} func The function to query.
  6650. * @returns {string} Returns the function name.
  6651. */
  6652. function getFuncName(func) {
  6653. var result = (func.name + ''),
  6654. array = realNames[result],
  6655. length = hasOwnProperty.call(realNames, result) ? array.length : 0;
  6656. while (length--) {
  6657. var data = array[length],
  6658. otherFunc = data.func;
  6659. if (otherFunc == null || otherFunc == func) {
  6660. return data.name;
  6661. }
  6662. }
  6663. return result;
  6664. }
  6665. /**
  6666. * Gets the argument placeholder value for `func`.
  6667. *
  6668. * @private
  6669. * @param {Function} func The function to inspect.
  6670. * @returns {*} Returns the placeholder value.
  6671. */
  6672. function getHolder(func) {
  6673. var object = hasOwnProperty.call(lodash, 'placeholder') ? lodash : func;
  6674. return object.placeholder;
  6675. }
  6676. /**
  6677. * Gets the appropriate "iteratee" function. If `_.iteratee` is customized,
  6678. * this function returns the custom method, otherwise it returns `baseIteratee`.
  6679. * If arguments are provided, the chosen function is invoked with them and
  6680. * its result is returned.
  6681. *
  6682. * @private
  6683. * @param {*} [value] The value to convert to an iteratee.
  6684. * @param {number} [arity] The arity of the created iteratee.
  6685. * @returns {Function} Returns the chosen function or its result.
  6686. */
  6687. function getIteratee() {
  6688. var result = lodash.iteratee || iteratee;
  6689. result = result === iteratee ? baseIteratee : result;
  6690. return arguments.length ? result(arguments[0], arguments[1]) : result;
  6691. }
  6692. /**
  6693. * Gets the data for `map`.
  6694. *
  6695. * @private
  6696. * @param {Object} map The map to query.
  6697. * @param {string} key The reference key.
  6698. * @returns {*} Returns the map data.
  6699. */
  6700. function getMapData(map, key) {
  6701. var data = map.__data__;
  6702. return isKeyable(key)
  6703. ? data[typeof key == 'string' ? 'string' : 'hash']
  6704. : data.map;
  6705. }
  6706. /**
  6707. * Gets the property names, values, and compare flags of `object`.
  6708. *
  6709. * @private
  6710. * @param {Object} object The object to query.
  6711. * @returns {Array} Returns the match data of `object`.
  6712. */
  6713. function getMatchData(object) {
  6714. var result = keys(object),
  6715. length = result.length;
  6716. while (length--) {
  6717. var key = result[length],
  6718. value = object[key];
  6719. result[length] = [key, value, isStrictComparable(value)];
  6720. }
  6721. return result;
  6722. }
  6723. /**
  6724. * Gets the native function at `key` of `object`.
  6725. *
  6726. * @private
  6727. * @param {Object} object The object to query.
  6728. * @param {string} key The key of the method to get.
  6729. * @returns {*} Returns the function if it's native, else `undefined`.
  6730. */
  6731. function getNative(object, key) {
  6732. var value = getValue(object, key);
  6733. return baseIsNative(value) ? value : undefined;
  6734. }
  6735. /**
  6736. * A specialized version of `baseGetTag` which ignores `Symbol.toStringTag` values.
  6737. *
  6738. * @private
  6739. * @param {*} value The value to query.
  6740. * @returns {string} Returns the raw `toStringTag`.
  6741. */
  6742. function getRawTag(value) {
  6743. var isOwn = hasOwnProperty.call(value, symToStringTag),
  6744. tag = value[symToStringTag];
  6745. try {
  6746. value[symToStringTag] = undefined;
  6747. var unmasked = true;
  6748. } catch (e) {}
  6749. var result = nativeObjectToString.call(value);
  6750. if (unmasked) {
  6751. if (isOwn) {
  6752. value[symToStringTag] = tag;
  6753. } else {
  6754. delete value[symToStringTag];
  6755. }
  6756. }
  6757. return result;
  6758. }
  6759. /**
  6760. * Creates an array of the own enumerable symbols of `object`.
  6761. *
  6762. * @private
  6763. * @param {Object} object The object to query.
  6764. * @returns {Array} Returns the array of symbols.
  6765. */
  6766. var getSymbols = !nativeGetSymbols ? stubArray : function(object) {
  6767. if (object == null) {
  6768. return [];
  6769. }
  6770. object = Object(object);
  6771. return arrayFilter(nativeGetSymbols(object), function(symbol) {
  6772. return propertyIsEnumerable.call(object, symbol);
  6773. });
  6774. };
  6775. /**
  6776. * Creates an array of the own and inherited enumerable symbols of `object`.
  6777. *
  6778. * @private
  6779. * @param {Object} object The object to query.
  6780. * @returns {Array} Returns the array of symbols.
  6781. */
  6782. var getSymbolsIn = !nativeGetSymbols ? stubArray : function(object) {
  6783. var result = [];
  6784. while (object) {
  6785. arrayPush(result, getSymbols(object));
  6786. object = getPrototype(object);
  6787. }
  6788. return result;
  6789. };
  6790. /**
  6791. * Gets the `toStringTag` of `value`.
  6792. *
  6793. * @private
  6794. * @param {*} value The value to query.
  6795. * @returns {string} Returns the `toStringTag`.
  6796. */
  6797. var getTag = baseGetTag;
  6798. // Fallback for data views, maps, sets, and weak maps in IE 11 and promises in Node.js < 6.
  6799. if ((DataView && getTag(new DataView(new ArrayBuffer(1))) != dataViewTag) ||
  6800. (Map && getTag(new Map) != mapTag) ||
  6801. (Promise && getTag(Promise.resolve()) != promiseTag) ||
  6802. (Set && getTag(new Set) != setTag) ||
  6803. (WeakMap && getTag(new WeakMap) != weakMapTag)) {
  6804. getTag = function(value) {
  6805. var result = baseGetTag(value),
  6806. Ctor = result == objectTag ? value.constructor : undefined,
  6807. ctorString = Ctor ? toSource(Ctor) : '';
  6808. if (ctorString) {
  6809. switch (ctorString) {
  6810. case dataViewCtorString: return dataViewTag;
  6811. case mapCtorString: return mapTag;
  6812. case promiseCtorString: return promiseTag;
  6813. case setCtorString: return setTag;
  6814. case weakMapCtorString: return weakMapTag;
  6815. }
  6816. }
  6817. return result;
  6818. };
  6819. }
  6820. /**
  6821. * Gets the view, applying any `transforms` to the `start` and `end` positions.
  6822. *
  6823. * @private
  6824. * @param {number} start The start of the view.
  6825. * @param {number} end The end of the view.
  6826. * @param {Array} transforms The transformations to apply to the view.
  6827. * @returns {Object} Returns an object containing the `start` and `end`
  6828. * positions of the view.
  6829. */
  6830. function getView(start, end, transforms) {
  6831. var index = -1,
  6832. length = transforms.length;
  6833. while (++index < length) {
  6834. var data = transforms[index],
  6835. size = data.size;
  6836. switch (data.type) {
  6837. case 'drop': start += size; break;
  6838. case 'dropRight': end -= size; break;
  6839. case 'take': end = nativeMin(end, start + size); break;
  6840. case 'takeRight': start = nativeMax(start, end - size); break;
  6841. }
  6842. }
  6843. return { 'start': start, 'end': end };
  6844. }
  6845. /**
  6846. * Extracts wrapper details from the `source` body comment.
  6847. *
  6848. * @private
  6849. * @param {string} source The source to inspect.
  6850. * @returns {Array} Returns the wrapper details.
  6851. */
  6852. function getWrapDetails(source) {
  6853. var match = source.match(reWrapDetails);
  6854. return match ? match[1].split(reSplitDetails) : [];
  6855. }
  6856. /**
  6857. * Checks if `path` exists on `object`.
  6858. *
  6859. * @private
  6860. * @param {Object} object The object to query.
  6861. * @param {Array|string} path The path to check.
  6862. * @param {Function} hasFunc The function to check properties.
  6863. * @returns {boolean} Returns `true` if `path` exists, else `false`.
  6864. */
  6865. function hasPath(object, path, hasFunc) {
  6866. path = castPath(path, object);
  6867. var index = -1,
  6868. length = path.length,
  6869. result = false;
  6870. while (++index < length) {
  6871. var key = toKey(path[index]);
  6872. if (!(result = object != null && hasFunc(object, key))) {
  6873. break;
  6874. }
  6875. object = object[key];
  6876. }
  6877. if (result || ++index != length) {
  6878. return result;
  6879. }
  6880. length = object == null ? 0 : object.length;
  6881. return !!length && isLength(length) && isIndex(key, length) &&
  6882. (isArray(object) || isArguments(object));
  6883. }
  6884. /**
  6885. * Initializes an array clone.
  6886. *
  6887. * @private
  6888. * @param {Array} array The array to clone.
  6889. * @returns {Array} Returns the initialized clone.
  6890. */
  6891. function initCloneArray(array) {
  6892. var length = array.length,
  6893. result = new array.constructor(length);
  6894. // Add properties assigned by `RegExp#exec`.
  6895. if (length && typeof array[0] == 'string' && hasOwnProperty.call(array, 'index')) {
  6896. result.index = array.index;
  6897. result.input = array.input;
  6898. }
  6899. return result;
  6900. }
  6901. /**
  6902. * Initializes an object clone.
  6903. *
  6904. * @private
  6905. * @param {Object} object The object to clone.
  6906. * @returns {Object} Returns the initialized clone.
  6907. */
  6908. function initCloneObject(object) {
  6909. return (typeof object.constructor == 'function' && !isPrototype(object))
  6910. ? baseCreate(getPrototype(object))
  6911. : {};
  6912. }
  6913. /**
  6914. * Initializes an object clone based on its `toStringTag`.
  6915. *
  6916. * **Note:** This function only supports cloning values with tags of
  6917. * `Boolean`, `Date`, `Error`, `Map`, `Number`, `RegExp`, `Set`, or `String`.
  6918. *
  6919. * @private
  6920. * @param {Object} object The object to clone.
  6921. * @param {string} tag The `toStringTag` of the object to clone.
  6922. * @param {boolean} [isDeep] Specify a deep clone.
  6923. * @returns {Object} Returns the initialized clone.
  6924. */
  6925. function initCloneByTag(object, tag, isDeep) {
  6926. var Ctor = object.constructor;
  6927. switch (tag) {
  6928. case arrayBufferTag:
  6929. return cloneArrayBuffer(object);
  6930. case boolTag:
  6931. case dateTag:
  6932. return new Ctor(+object);
  6933. case dataViewTag:
  6934. return cloneDataView(object, isDeep);
  6935. case float32Tag: case float64Tag:
  6936. case int8Tag: case int16Tag: case int32Tag:
  6937. case uint8Tag: case uint8ClampedTag: case uint16Tag: case uint32Tag:
  6938. return cloneTypedArray(object, isDeep);
  6939. case mapTag:
  6940. return new Ctor;
  6941. case numberTag:
  6942. case stringTag:
  6943. return new Ctor(object);
  6944. case regexpTag:
  6945. return cloneRegExp(object);
  6946. case setTag:
  6947. return new Ctor;
  6948. case symbolTag:
  6949. return cloneSymbol(object);
  6950. }
  6951. }
  6952. /**
  6953. * Inserts wrapper `details` in a comment at the top of the `source` body.
  6954. *
  6955. * @private
  6956. * @param {string} source The source to modify.
  6957. * @returns {Array} details The details to insert.
  6958. * @returns {string} Returns the modified source.
  6959. */
  6960. function insertWrapDetails(source, details) {
  6961. var length = details.length;
  6962. if (!length) {
  6963. return source;
  6964. }
  6965. var lastIndex = length - 1;
  6966. details[lastIndex] = (length > 1 ? '& ' : '') + details[lastIndex];
  6967. details = details.join(length > 2 ? ', ' : ' ');
  6968. return source.replace(reWrapComment, '{\n/* [wrapped with ' + details + '] */\n');
  6969. }
  6970. /**
  6971. * Checks if `value` is a flattenable `arguments` object or array.
  6972. *
  6973. * @private
  6974. * @param {*} value The value to check.
  6975. * @returns {boolean} Returns `true` if `value` is flattenable, else `false`.
  6976. */
  6977. function isFlattenable(value) {
  6978. return isArray(value) || isArguments(value) ||
  6979. !!(spreadableSymbol && value && value[spreadableSymbol]);
  6980. }
  6981. /**
  6982. * Checks if `value` is a valid array-like index.
  6983. *
  6984. * @private
  6985. * @param {*} value The value to check.
  6986. * @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index.
  6987. * @returns {boolean} Returns `true` if `value` is a valid index, else `false`.
  6988. */
  6989. function isIndex(value, length) {
  6990. var type = typeof value;
  6991. length = length == null ? MAX_SAFE_INTEGER : length;
  6992. return !!length &&
  6993. (type == 'number' ||
  6994. (type != 'symbol' && reIsUint.test(value))) &&
  6995. (value > -1 && value % 1 == 0 && value < length);
  6996. }
  6997. /**
  6998. * Checks if the given arguments are from an iteratee call.
  6999. *
  7000. * @private
  7001. * @param {*} value The potential iteratee value argument.
  7002. * @param {*} index The potential iteratee index or key argument.
  7003. * @param {*} object The potential iteratee object argument.
  7004. * @returns {boolean} Returns `true` if the arguments are from an iteratee call,
  7005. * else `false`.
  7006. */
  7007. function isIterateeCall(value, index, object) {
  7008. if (!isObject(object)) {
  7009. return false;
  7010. }
  7011. var type = typeof index;
  7012. if (type == 'number'
  7013. ? (isArrayLike(object) && isIndex(index, object.length))
  7014. : (type == 'string' && index in object)
  7015. ) {
  7016. return eq(object[index], value);
  7017. }
  7018. return false;
  7019. }
  7020. /**
  7021. * Checks if `value` is a property name and not a property path.
  7022. *
  7023. * @private
  7024. * @param {*} value The value to check.
  7025. * @param {Object} [object] The object to query keys on.
  7026. * @returns {boolean} Returns `true` if `value` is a property name, else `false`.
  7027. */
  7028. function isKey(value, object) {
  7029. if (isArray(value)) {
  7030. return false;
  7031. }
  7032. var type = typeof value;
  7033. if (type == 'number' || type == 'symbol' || type == 'boolean' ||
  7034. value == null || isSymbol(value)) {
  7035. return true;
  7036. }
  7037. return reIsPlainProp.test(value) || !reIsDeepProp.test(value) ||
  7038. (object != null && value in Object(object));
  7039. }
  7040. /**
  7041. * Checks if `value` is suitable for use as unique object key.
  7042. *
  7043. * @private
  7044. * @param {*} value The value to check.
  7045. * @returns {boolean} Returns `true` if `value` is suitable, else `false`.
  7046. */
  7047. function isKeyable(value) {
  7048. var type = typeof value;
  7049. return (type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean')
  7050. ? (value !== '__proto__')
  7051. : (value === null);
  7052. }
  7053. /**
  7054. * Checks if `func` has a lazy counterpart.
  7055. *
  7056. * @private
  7057. * @param {Function} func The function to check.
  7058. * @returns {boolean} Returns `true` if `func` has a lazy counterpart,
  7059. * else `false`.
  7060. */
  7061. function isLaziable(func) {
  7062. var funcName = getFuncName(func),
  7063. other = lodash[funcName];
  7064. if (typeof other != 'function' || !(funcName in LazyWrapper.prototype)) {
  7065. return false;
  7066. }
  7067. if (func === other) {
  7068. return true;
  7069. }
  7070. var data = getData(other);
  7071. return !!data && func === data[0];
  7072. }
  7073. /**
  7074. * Checks if `func` has its source masked.
  7075. *
  7076. * @private
  7077. * @param {Function} func The function to check.
  7078. * @returns {boolean} Returns `true` if `func` is masked, else `false`.
  7079. */
  7080. function isMasked(func) {
  7081. return !!maskSrcKey && (maskSrcKey in func);
  7082. }
  7083. /**
  7084. * Checks if `func` is capable of being masked.
  7085. *
  7086. * @private
  7087. * @param {*} value The value to check.
  7088. * @returns {boolean} Returns `true` if `func` is maskable, else `false`.
  7089. */
  7090. var isMaskable = coreJsData ? isFunction : stubFalse;
  7091. /**
  7092. * Checks if `value` is likely a prototype object.
  7093. *
  7094. * @private
  7095. * @param {*} value The value to check.
  7096. * @returns {boolean} Returns `true` if `value` is a prototype, else `false`.
  7097. */
  7098. function isPrototype(value) {
  7099. var Ctor = value && value.constructor,
  7100. proto = (typeof Ctor == 'function' && Ctor.prototype) || objectProto;
  7101. return value === proto;
  7102. }
  7103. /**
  7104. * Checks if `value` is suitable for strict equality comparisons, i.e. `===`.
  7105. *
  7106. * @private
  7107. * @param {*} value The value to check.
  7108. * @returns {boolean} Returns `true` if `value` if suitable for strict
  7109. * equality comparisons, else `false`.
  7110. */
  7111. function isStrictComparable(value) {
  7112. return value === value && !isObject(value);
  7113. }
  7114. /**
  7115. * A specialized version of `matchesProperty` for source values suitable
  7116. * for strict equality comparisons, i.e. `===`.
  7117. *
  7118. * @private
  7119. * @param {string} key The key of the property to get.
  7120. * @param {*} srcValue The value to match.
  7121. * @returns {Function} Returns the new spec function.
  7122. */
  7123. function matchesStrictComparable(key, srcValue) {
  7124. return function(object) {
  7125. if (object == null) {
  7126. return false;
  7127. }
  7128. return object[key] === srcValue &&
  7129. (srcValue !== undefined || (key in Object(object)));
  7130. };
  7131. }
  7132. /**
  7133. * A specialized version of `_.memoize` which clears the memoized function's
  7134. * cache when it exceeds `MAX_MEMOIZE_SIZE`.
  7135. *
  7136. * @private
  7137. * @param {Function} func The function to have its output memoized.
  7138. * @returns {Function} Returns the new memoized function.
  7139. */
  7140. function memoizeCapped(func) {
  7141. var result = memoize(func, function(key) {
  7142. if (cache.size === MAX_MEMOIZE_SIZE) {
  7143. cache.clear();
  7144. }
  7145. return key;
  7146. });
  7147. var cache = result.cache;
  7148. return result;
  7149. }
  7150. /**
  7151. * Merges the function metadata of `source` into `data`.
  7152. *
  7153. * Merging metadata reduces the number of wrappers used to invoke a function.
  7154. * This is possible because methods like `_.bind`, `_.curry`, and `_.partial`
  7155. * may be applied regardless of execution order. Methods like `_.ary` and
  7156. * `_.rearg` modify function arguments, making the order in which they are
  7157. * executed important, preventing the merging of metadata. However, we make
  7158. * an exception for a safe combined case where curried functions have `_.ary`
  7159. * and or `_.rearg` applied.
  7160. *
  7161. * @private
  7162. * @param {Array} data The destination metadata.
  7163. * @param {Array} source The source metadata.
  7164. * @returns {Array} Returns `data`.
  7165. */
  7166. function mergeData(data, source) {
  7167. var bitmask = data[1],
  7168. srcBitmask = source[1],
  7169. newBitmask = bitmask | srcBitmask,
  7170. isCommon = newBitmask < (WRAP_BIND_FLAG | WRAP_BIND_KEY_FLAG | WRAP_ARY_FLAG);
  7171. var isCombo =
  7172. ((srcBitmask == WRAP_ARY_FLAG) && (bitmask == WRAP_CURRY_FLAG)) ||
  7173. ((srcBitmask == WRAP_ARY_FLAG) && (bitmask == WRAP_REARG_FLAG) && (data[7].length <= source[8])) ||
  7174. ((srcBitmask == (WRAP_ARY_FLAG | WRAP_REARG_FLAG)) && (source[7].length <= source[8]) && (bitmask == WRAP_CURRY_FLAG));
  7175. // Exit early if metadata can't be merged.
  7176. if (!(isCommon || isCombo)) {
  7177. return data;
  7178. }
  7179. // Use source `thisArg` if available.
  7180. if (srcBitmask & WRAP_BIND_FLAG) {
  7181. data[2] = source[2];
  7182. // Set when currying a bound function.
  7183. newBitmask |= bitmask & WRAP_BIND_FLAG ? 0 : WRAP_CURRY_BOUND_FLAG;
  7184. }
  7185. // Compose partial arguments.
  7186. var value = source[3];
  7187. if (value) {
  7188. var partials = data[3];
  7189. data[3] = partials ? composeArgs(partials, value, source[4]) : value;
  7190. data[4] = partials ? replaceHolders(data[3], PLACEHOLDER) : source[4];
  7191. }
  7192. // Compose partial right arguments.
  7193. value = source[5];
  7194. if (value) {
  7195. partials = data[5];
  7196. data[5] = partials ? composeArgsRight(partials, value, source[6]) : value;
  7197. data[6] = partials ? replaceHolders(data[5], PLACEHOLDER) : source[6];
  7198. }
  7199. // Use source `argPos` if available.
  7200. value = source[7];
  7201. if (value) {
  7202. data[7] = value;
  7203. }
  7204. // Use source `ary` if it's smaller.
  7205. if (srcBitmask & WRAP_ARY_FLAG) {
  7206. data[8] = data[8] == null ? source[8] : nativeMin(data[8], source[8]);
  7207. }
  7208. // Use source `arity` if one is not provided.
  7209. if (data[9] == null) {
  7210. data[9] = source[9];
  7211. }
  7212. // Use source `func` and merge bitmasks.
  7213. data[0] = source[0];
  7214. data[1] = newBitmask;
  7215. return data;
  7216. }
  7217. /**
  7218. * This function is like
  7219. * [`Object.keys`](http://ecma-international.org/ecma-262/7.0/#sec-object.keys)
  7220. * except that it includes inherited enumerable properties.
  7221. *
  7222. * @private
  7223. * @param {Object} object The object to query.
  7224. * @returns {Array} Returns the array of property names.
  7225. */
  7226. function nativeKeysIn(object) {
  7227. var result = [];
  7228. if (object != null) {
  7229. for (var key in Object(object)) {
  7230. result.push(key);
  7231. }
  7232. }
  7233. return result;
  7234. }
  7235. /**
  7236. * Converts `value` to a string using `Object.prototype.toString`.
  7237. *
  7238. * @private
  7239. * @param {*} value The value to convert.
  7240. * @returns {string} Returns the converted string.
  7241. */
  7242. function objectToString(value) {
  7243. return nativeObjectToString.call(value);
  7244. }
  7245. /**
  7246. * A specialized version of `baseRest` which transforms the rest array.
  7247. *
  7248. * @private
  7249. * @param {Function} func The function to apply a rest parameter to.
  7250. * @param {number} [start=func.length-1] The start position of the rest parameter.
  7251. * @param {Function} transform The rest array transform.
  7252. * @returns {Function} Returns the new function.
  7253. */
  7254. function overRest(func, start, transform) {
  7255. start = nativeMax(start === undefined ? (func.length - 1) : start, 0);
  7256. return function() {
  7257. var args = arguments,
  7258. index = -1,
  7259. length = nativeMax(args.length - start, 0),
  7260. array = Array(length);
  7261. while (++index < length) {
  7262. array[index] = args[start + index];
  7263. }
  7264. index = -1;
  7265. var otherArgs = Array(start + 1);
  7266. while (++index < start) {
  7267. otherArgs[index] = args[index];
  7268. }
  7269. otherArgs[start] = transform(array);
  7270. return apply(func, this, otherArgs);
  7271. };
  7272. }
  7273. /**
  7274. * Gets the parent value at `path` of `object`.
  7275. *
  7276. * @private
  7277. * @param {Object} object The object to query.
  7278. * @param {Array} path The path to get the parent value of.
  7279. * @returns {*} Returns the parent value.
  7280. */
  7281. function parent(object, path) {
  7282. return path.length < 2 ? object : baseGet(object, baseSlice(path, 0, -1));
  7283. }
  7284. /**
  7285. * Reorder `array` according to the specified indexes where the element at
  7286. * the first index is assigned as the first element, the element at
  7287. * the second index is assigned as the second element, and so on.
  7288. *
  7289. * @private
  7290. * @param {Array} array The array to reorder.
  7291. * @param {Array} indexes The arranged array indexes.
  7292. * @returns {Array} Returns `array`.
  7293. */
  7294. function reorder(array, indexes) {
  7295. var arrLength = array.length,
  7296. length = nativeMin(indexes.length, arrLength),
  7297. oldArray = copyArray(array);
  7298. while (length--) {
  7299. var index = indexes[length];
  7300. array[length] = isIndex(index, arrLength) ? oldArray[index] : undefined;
  7301. }
  7302. return array;
  7303. }
  7304. /**
  7305. * Sets metadata for `func`.
  7306. *
  7307. * **Note:** If this function becomes hot, i.e. is invoked a lot in a short
  7308. * period of time, it will trip its breaker and transition to an identity
  7309. * function to avoid garbage collection pauses in V8. See
  7310. * [V8 issue 2070](https://bugs.chromium.org/p/v8/issues/detail?id=2070)
  7311. * for more details.
  7312. *
  7313. * @private
  7314. * @param {Function} func The function to associate metadata with.
  7315. * @param {*} data The metadata.
  7316. * @returns {Function} Returns `func`.
  7317. */
  7318. var setData = shortOut(baseSetData);
  7319. /**
  7320. * A simple wrapper around the global [`setTimeout`](https://mdn.io/setTimeout).
  7321. *
  7322. * @private
  7323. * @param {Function} func The function to delay.
  7324. * @param {number} wait The number of milliseconds to delay invocation.
  7325. * @returns {number|Object} Returns the timer id or timeout object.
  7326. */
  7327. var setTimeout = ctxSetTimeout || function(func, wait) {
  7328. return root.setTimeout(func, wait);
  7329. };
  7330. /**
  7331. * Sets the `toString` method of `func` to return `string`.
  7332. *
  7333. * @private
  7334. * @param {Function} func The function to modify.
  7335. * @param {Function} string The `toString` result.
  7336. * @returns {Function} Returns `func`.
  7337. */
  7338. var setToString = shortOut(baseSetToString);
  7339. /**
  7340. * Sets the `toString` method of `wrapper` to mimic the source of `reference`
  7341. * with wrapper details in a comment at the top of the source body.
  7342. *
  7343. * @private
  7344. * @param {Function} wrapper The function to modify.
  7345. * @param {Function} reference The reference function.
  7346. * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
  7347. * @returns {Function} Returns `wrapper`.
  7348. */
  7349. function setWrapToString(wrapper, reference, bitmask) {
  7350. var source = (reference + '');
  7351. return setToString(wrapper, insertWrapDetails(source, updateWrapDetails(getWrapDetails(source), bitmask)));
  7352. }
  7353. /**
  7354. * Creates a function that'll short out and invoke `identity` instead
  7355. * of `func` when it's called `HOT_COUNT` or more times in `HOT_SPAN`
  7356. * milliseconds.
  7357. *
  7358. * @private
  7359. * @param {Function} func The function to restrict.
  7360. * @returns {Function} Returns the new shortable function.
  7361. */
  7362. function shortOut(func) {
  7363. var count = 0,
  7364. lastCalled = 0;
  7365. return function() {
  7366. var stamp = nativeNow(),
  7367. remaining = HOT_SPAN - (stamp - lastCalled);
  7368. lastCalled = stamp;
  7369. if (remaining > 0) {
  7370. if (++count >= HOT_COUNT) {
  7371. return arguments[0];
  7372. }
  7373. } else {
  7374. count = 0;
  7375. }
  7376. return func.apply(undefined, arguments);
  7377. };
  7378. }
  7379. /**
  7380. * A specialized version of `_.shuffle` which mutates and sets the size of `array`.
  7381. *
  7382. * @private
  7383. * @param {Array} array The array to shuffle.
  7384. * @param {number} [size=array.length] The size of `array`.
  7385. * @returns {Array} Returns `array`.
  7386. */
  7387. function shuffleSelf(array, size) {
  7388. var index = -1,
  7389. length = array.length,
  7390. lastIndex = length - 1;
  7391. size = size === undefined ? length : size;
  7392. while (++index < size) {
  7393. var rand = baseRandom(index, lastIndex),
  7394. value = array[rand];
  7395. array[rand] = array[index];
  7396. array[index] = value;
  7397. }
  7398. array.length = size;
  7399. return array;
  7400. }
  7401. /**
  7402. * Converts `string` to a property path array.
  7403. *
  7404. * @private
  7405. * @param {string} string The string to convert.
  7406. * @returns {Array} Returns the property path array.
  7407. */
  7408. var stringToPath = memoizeCapped(function(string) {
  7409. var result = [];
  7410. if (string.charCodeAt(0) === 46 /* . */) {
  7411. result.push('');
  7412. }
  7413. string.replace(rePropName, function(match, number, quote, subString) {
  7414. result.push(quote ? subString.replace(reEscapeChar, '$1') : (number || match));
  7415. });
  7416. return result;
  7417. });
  7418. /**
  7419. * Converts `value` to a string key if it's not a string or symbol.
  7420. *
  7421. * @private
  7422. * @param {*} value The value to inspect.
  7423. * @returns {string|symbol} Returns the key.
  7424. */
  7425. function toKey(value) {
  7426. if (typeof value == 'string' || isSymbol(value)) {
  7427. return value;
  7428. }
  7429. var result = (value + '');
  7430. return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
  7431. }
  7432. /**
  7433. * Converts `func` to its source code.
  7434. *
  7435. * @private
  7436. * @param {Function} func The function to convert.
  7437. * @returns {string} Returns the source code.
  7438. */
  7439. function toSource(func) {
  7440. if (func != null) {
  7441. try {
  7442. return funcToString.call(func);
  7443. } catch (e) {}
  7444. try {
  7445. return (func + '');
  7446. } catch (e) {}
  7447. }
  7448. return '';
  7449. }
  7450. /**
  7451. * Updates wrapper `details` based on `bitmask` flags.
  7452. *
  7453. * @private
  7454. * @returns {Array} details The details to modify.
  7455. * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
  7456. * @returns {Array} Returns `details`.
  7457. */
  7458. function updateWrapDetails(details, bitmask) {
  7459. arrayEach(wrapFlags, function(pair) {
  7460. var value = '_.' + pair[0];
  7461. if ((bitmask & pair[1]) && !arrayIncludes(details, value)) {
  7462. details.push(value);
  7463. }
  7464. });
  7465. return details.sort();
  7466. }
  7467. /**
  7468. * Creates a clone of `wrapper`.
  7469. *
  7470. * @private
  7471. * @param {Object} wrapper The wrapper to clone.
  7472. * @returns {Object} Returns the cloned wrapper.
  7473. */
  7474. function wrapperClone(wrapper) {
  7475. if (wrapper instanceof LazyWrapper) {
  7476. return wrapper.clone();
  7477. }
  7478. var result = new LodashWrapper(wrapper.__wrapped__, wrapper.__chain__);
  7479. result.__actions__ = copyArray(wrapper.__actions__);
  7480. result.__index__ = wrapper.__index__;
  7481. result.__values__ = wrapper.__values__;
  7482. return result;
  7483. }
  7484. /*------------------------------------------------------------------------*/
  7485. /**
  7486. * Creates an array of elements split into groups the length of `size`.
  7487. * If `array` can't be split evenly, the final chunk will be the remaining
  7488. * elements.
  7489. *
  7490. * @static
  7491. * @memberOf _
  7492. * @since 3.0.0
  7493. * @category Array
  7494. * @param {Array} array The array to process.
  7495. * @param {number} [size=1] The length of each chunk
  7496. * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
  7497. * @returns {Array} Returns the new array of chunks.
  7498. * @example
  7499. *
  7500. * _.chunk(['a', 'b', 'c', 'd'], 2);
  7501. * // => [['a', 'b'], ['c', 'd']]
  7502. *
  7503. * _.chunk(['a', 'b', 'c', 'd'], 3);
  7504. * // => [['a', 'b', 'c'], ['d']]
  7505. */
  7506. function chunk(array, size, guard) {
  7507. if ((guard ? isIterateeCall(array, size, guard) : size === undefined)) {
  7508. size = 1;
  7509. } else {
  7510. size = nativeMax(toInteger(size), 0);
  7511. }
  7512. var length = array == null ? 0 : array.length;
  7513. if (!length || size < 1) {
  7514. return [];
  7515. }
  7516. var index = 0,
  7517. resIndex = 0,
  7518. result = Array(nativeCeil(length / size));
  7519. while (index < length) {
  7520. result[resIndex++] = baseSlice(array, index, (index += size));
  7521. }
  7522. return result;
  7523. }
  7524. /**
  7525. * Creates an array with all falsey values removed. The values `false`, `null`,
  7526. * `0`, `""`, `undefined`, and `NaN` are falsey.
  7527. *
  7528. * @static
  7529. * @memberOf _
  7530. * @since 0.1.0
  7531. * @category Array
  7532. * @param {Array} array The array to compact.
  7533. * @returns {Array} Returns the new array of filtered values.
  7534. * @example
  7535. *
  7536. * _.compact([0, 1, false, 2, '', 3]);
  7537. * // => [1, 2, 3]
  7538. */
  7539. function compact(array) {
  7540. var index = -1,
  7541. length = array == null ? 0 : array.length,
  7542. resIndex = 0,
  7543. result = [];
  7544. while (++index < length) {
  7545. var value = array[index];
  7546. if (value) {
  7547. result[resIndex++] = value;
  7548. }
  7549. }
  7550. return result;
  7551. }
  7552. /**
  7553. * Creates a new array concatenating `array` with any additional arrays
  7554. * and/or values.
  7555. *
  7556. * @static
  7557. * @memberOf _
  7558. * @since 4.0.0
  7559. * @category Array
  7560. * @param {Array} array The array to concatenate.
  7561. * @param {...*} [values] The values to concatenate.
  7562. * @returns {Array} Returns the new concatenated array.
  7563. * @example
  7564. *
  7565. * var array = [1];
  7566. * var other = _.concat(array, 2, [3], [[4]]);
  7567. *
  7568. * console.log(other);
  7569. * // => [1, 2, 3, [4]]
  7570. *
  7571. * console.log(array);
  7572. * // => [1]
  7573. */
  7574. function concat() {
  7575. var length = arguments.length;
  7576. if (!length) {
  7577. return [];
  7578. }
  7579. var args = Array(length - 1),
  7580. array = arguments[0],
  7581. index = length;
  7582. while (index--) {
  7583. args[index - 1] = arguments[index];
  7584. }
  7585. return arrayPush(isArray(array) ? copyArray(array) : [array], baseFlatten(args, 1));
  7586. }
  7587. /**
  7588. * Creates an array of `array` values not included in the other given arrays
  7589. * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
  7590. * for equality comparisons. The order and references of result values are
  7591. * determined by the first array.
  7592. *
  7593. * **Note:** Unlike `_.pullAll`, this method returns a new array.
  7594. *
  7595. * @static
  7596. * @memberOf _
  7597. * @since 0.1.0
  7598. * @category Array
  7599. * @param {Array} array The array to inspect.
  7600. * @param {...Array} [values] The values to exclude.
  7601. * @returns {Array} Returns the new array of filtered values.
  7602. * @see _.without, _.xor
  7603. * @example
  7604. *
  7605. * _.difference([2, 1], [2, 3]);
  7606. * // => [1]
  7607. */
  7608. var difference = baseRest(function(array, values) {
  7609. return isArrayLikeObject(array)
  7610. ? baseDifference(array, baseFlatten(values, 1, isArrayLikeObject, true))
  7611. : [];
  7612. });
  7613. /**
  7614. * This method is like `_.difference` except that it accepts `iteratee` which
  7615. * is invoked for each element of `array` and `values` to generate the criterion
  7616. * by which they're compared. The order and references of result values are
  7617. * determined by the first array. The iteratee is invoked with one argument:
  7618. * (value).
  7619. *
  7620. * **Note:** Unlike `_.pullAllBy`, this method returns a new array.
  7621. *
  7622. * @static
  7623. * @memberOf _
  7624. * @since 4.0.0
  7625. * @category Array
  7626. * @param {Array} array The array to inspect.
  7627. * @param {...Array} [values] The values to exclude.
  7628. * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
  7629. * @returns {Array} Returns the new array of filtered values.
  7630. * @example
  7631. *
  7632. * _.differenceBy([2.1, 1.2], [2.3, 3.4], Math.floor);
  7633. * // => [1.2]
  7634. *
  7635. * // The `_.property` iteratee shorthand.
  7636. * _.differenceBy([{ 'x': 2 }, { 'x': 1 }], [{ 'x': 1 }], 'x');
  7637. * // => [{ 'x': 2 }]
  7638. */
  7639. var differenceBy = baseRest(function(array, values) {
  7640. var iteratee = last(values);
  7641. if (isArrayLikeObject(iteratee)) {
  7642. iteratee = undefined;
  7643. }
  7644. return isArrayLikeObject(array)
  7645. ? baseDifference(array, baseFlatten(values, 1, isArrayLikeObject, true), getIteratee(iteratee, 2))
  7646. : [];
  7647. });
  7648. /**
  7649. * This method is like `_.difference` except that it accepts `comparator`
  7650. * which is invoked to compare elements of `array` to `values`. The order and
  7651. * references of result values are determined by the first array. The comparator
  7652. * is invoked with two arguments: (arrVal, othVal).
  7653. *
  7654. * **Note:** Unlike `_.pullAllWith`, this method returns a new array.
  7655. *
  7656. * @static
  7657. * @memberOf _
  7658. * @since 4.0.0
  7659. * @category Array
  7660. * @param {Array} array The array to inspect.
  7661. * @param {...Array} [values] The values to exclude.
  7662. * @param {Function} [comparator] The comparator invoked per element.
  7663. * @returns {Array} Returns the new array of filtered values.
  7664. * @example
  7665. *
  7666. * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }];
  7667. *
  7668. * _.differenceWith(objects, [{ 'x': 1, 'y': 2 }], _.isEqual);
  7669. * // => [{ 'x': 2, 'y': 1 }]
  7670. */
  7671. var differenceWith = baseRest(function(array, values) {
  7672. var comparator = last(values);
  7673. if (isArrayLikeObject(comparator)) {
  7674. comparator = undefined;
  7675. }
  7676. return isArrayLikeObject(array)
  7677. ? baseDifference(array, baseFlatten(values, 1, isArrayLikeObject, true), undefined, comparator)
  7678. : [];
  7679. });
  7680. /**
  7681. * Creates a slice of `array` with `n` elements dropped from the beginning.
  7682. *
  7683. * @static
  7684. * @memberOf _
  7685. * @since 0.5.0
  7686. * @category Array
  7687. * @param {Array} array The array to query.
  7688. * @param {number} [n=1] The number of elements to drop.
  7689. * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
  7690. * @returns {Array} Returns the slice of `array`.
  7691. * @example
  7692. *
  7693. * _.drop([1, 2, 3]);
  7694. * // => [2, 3]
  7695. *
  7696. * _.drop([1, 2, 3], 2);
  7697. * // => [3]
  7698. *
  7699. * _.drop([1, 2, 3], 5);
  7700. * // => []
  7701. *
  7702. * _.drop([1, 2, 3], 0);
  7703. * // => [1, 2, 3]
  7704. */
  7705. function drop(array, n, guard) {
  7706. var length = array == null ? 0 : array.length;
  7707. if (!length) {
  7708. return [];
  7709. }
  7710. n = (guard || n === undefined) ? 1 : toInteger(n);
  7711. return baseSlice(array, n < 0 ? 0 : n, length);
  7712. }
  7713. /**
  7714. * Creates a slice of `array` with `n` elements dropped from the end.
  7715. *
  7716. * @static
  7717. * @memberOf _
  7718. * @since 3.0.0
  7719. * @category Array
  7720. * @param {Array} array The array to query.
  7721. * @param {number} [n=1] The number of elements to drop.
  7722. * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
  7723. * @returns {Array} Returns the slice of `array`.
  7724. * @example
  7725. *
  7726. * _.dropRight([1, 2, 3]);
  7727. * // => [1, 2]
  7728. *
  7729. * _.dropRight([1, 2, 3], 2);
  7730. * // => [1]
  7731. *
  7732. * _.dropRight([1, 2, 3], 5);
  7733. * // => []
  7734. *
  7735. * _.dropRight([1, 2, 3], 0);
  7736. * // => [1, 2, 3]
  7737. */
  7738. function dropRight(array, n, guard) {
  7739. var length = array == null ? 0 : array.length;
  7740. if (!length) {
  7741. return [];
  7742. }
  7743. n = (guard || n === undefined) ? 1 : toInteger(n);
  7744. n = length - n;
  7745. return baseSlice(array, 0, n < 0 ? 0 : n);
  7746. }
  7747. /**
  7748. * Creates a slice of `array` excluding elements dropped from the end.
  7749. * Elements are dropped until `predicate` returns falsey. The predicate is
  7750. * invoked with three arguments: (value, index, array).
  7751. *
  7752. * @static
  7753. * @memberOf _
  7754. * @since 3.0.0
  7755. * @category Array
  7756. * @param {Array} array The array to query.
  7757. * @param {Function} [predicate=_.identity] The function invoked per iteration.
  7758. * @returns {Array} Returns the slice of `array`.
  7759. * @example
  7760. *
  7761. * var users = [
  7762. * { 'user': 'barney', 'active': true },
  7763. * { 'user': 'fred', 'active': false },
  7764. * { 'user': 'pebbles', 'active': false }
  7765. * ];
  7766. *
  7767. * _.dropRightWhile(users, function(o) { return !o.active; });
  7768. * // => objects for ['barney']
  7769. *
  7770. * // The `_.matches` iteratee shorthand.
  7771. * _.dropRightWhile(users, { 'user': 'pebbles', 'active': false });
  7772. * // => objects for ['barney', 'fred']
  7773. *
  7774. * // The `_.matchesProperty` iteratee shorthand.
  7775. * _.dropRightWhile(users, ['active', false]);
  7776. * // => objects for ['barney']
  7777. *
  7778. * // The `_.property` iteratee shorthand.
  7779. * _.dropRightWhile(users, 'active');
  7780. * // => objects for ['barney', 'fred', 'pebbles']
  7781. */
  7782. function dropRightWhile(array, predicate) {
  7783. return (array && array.length)
  7784. ? baseWhile(array, getIteratee(predicate, 3), true, true)
  7785. : [];
  7786. }
  7787. /**
  7788. * Creates a slice of `array` excluding elements dropped from the beginning.
  7789. * Elements are dropped until `predicate` returns falsey. The predicate is
  7790. * invoked with three arguments: (value, index, array).
  7791. *
  7792. * @static
  7793. * @memberOf _
  7794. * @since 3.0.0
  7795. * @category Array
  7796. * @param {Array} array The array to query.
  7797. * @param {Function} [predicate=_.identity] The function invoked per iteration.
  7798. * @returns {Array} Returns the slice of `array`.
  7799. * @example
  7800. *
  7801. * var users = [
  7802. * { 'user': 'barney', 'active': false },
  7803. * { 'user': 'fred', 'active': false },
  7804. * { 'user': 'pebbles', 'active': true }
  7805. * ];
  7806. *
  7807. * _.dropWhile(users, function(o) { return !o.active; });
  7808. * // => objects for ['pebbles']
  7809. *
  7810. * // The `_.matches` iteratee shorthand.
  7811. * _.dropWhile(users, { 'user': 'barney', 'active': false });
  7812. * // => objects for ['fred', 'pebbles']
  7813. *
  7814. * // The `_.matchesProperty` iteratee shorthand.
  7815. * _.dropWhile(users, ['active', false]);
  7816. * // => objects for ['pebbles']
  7817. *
  7818. * // The `_.property` iteratee shorthand.
  7819. * _.dropWhile(users, 'active');
  7820. * // => objects for ['barney', 'fred', 'pebbles']
  7821. */
  7822. function dropWhile(array, predicate) {
  7823. return (array && array.length)
  7824. ? baseWhile(array, getIteratee(predicate, 3), true)
  7825. : [];
  7826. }
  7827. /**
  7828. * Fills elements of `array` with `value` from `start` up to, but not
  7829. * including, `end`.
  7830. *
  7831. * **Note:** This method mutates `array`.
  7832. *
  7833. * @static
  7834. * @memberOf _
  7835. * @since 3.2.0
  7836. * @category Array
  7837. * @param {Array} array The array to fill.
  7838. * @param {*} value The value to fill `array` with.
  7839. * @param {number} [start=0] The start position.
  7840. * @param {number} [end=array.length] The end position.
  7841. * @returns {Array} Returns `array`.
  7842. * @example
  7843. *
  7844. * var array = [1, 2, 3];
  7845. *
  7846. * _.fill(array, 'a');
  7847. * console.log(array);
  7848. * // => ['a', 'a', 'a']
  7849. *
  7850. * _.fill(Array(3), 2);
  7851. * // => [2, 2, 2]
  7852. *
  7853. * _.fill([4, 6, 8, 10], '*', 1, 3);
  7854. * // => [4, '*', '*', 10]
  7855. */
  7856. function fill(array, value, start, end) {
  7857. var length = array == null ? 0 : array.length;
  7858. if (!length) {
  7859. return [];
  7860. }
  7861. if (start && typeof start != 'number' && isIterateeCall(array, value, start)) {
  7862. start = 0;
  7863. end = length;
  7864. }
  7865. return baseFill(array, value, start, end);
  7866. }
  7867. /**
  7868. * This method is like `_.find` except that it returns the index of the first
  7869. * element `predicate` returns truthy for instead of the element itself.
  7870. *
  7871. * @static
  7872. * @memberOf _
  7873. * @since 1.1.0
  7874. * @category Array
  7875. * @param {Array} array The array to inspect.
  7876. * @param {Function} [predicate=_.identity] The function invoked per iteration.
  7877. * @param {number} [fromIndex=0] The index to search from.
  7878. * @returns {number} Returns the index of the found element, else `-1`.
  7879. * @example
  7880. *
  7881. * var users = [
  7882. * { 'user': 'barney', 'active': false },
  7883. * { 'user': 'fred', 'active': false },
  7884. * { 'user': 'pebbles', 'active': true }
  7885. * ];
  7886. *
  7887. * _.findIndex(users, function(o) { return o.user == 'barney'; });
  7888. * // => 0
  7889. *
  7890. * // The `_.matches` iteratee shorthand.
  7891. * _.findIndex(users, { 'user': 'fred', 'active': false });
  7892. * // => 1
  7893. *
  7894. * // The `_.matchesProperty` iteratee shorthand.
  7895. * _.findIndex(users, ['active', false]);
  7896. * // => 0
  7897. *
  7898. * // The `_.property` iteratee shorthand.
  7899. * _.findIndex(users, 'active');
  7900. * // => 2
  7901. */
  7902. function findIndex(array, predicate, fromIndex) {
  7903. var length = array == null ? 0 : array.length;
  7904. if (!length) {
  7905. return -1;
  7906. }
  7907. var index = fromIndex == null ? 0 : toInteger(fromIndex);
  7908. if (index < 0) {
  7909. index = nativeMax(length + index, 0);
  7910. }
  7911. return baseFindIndex(array, getIteratee(predicate, 3), index);
  7912. }
  7913. /**
  7914. * This method is like `_.findIndex` except that it iterates over elements
  7915. * of `collection` from right to left.
  7916. *
  7917. * @static
  7918. * @memberOf _
  7919. * @since 2.0.0
  7920. * @category Array
  7921. * @param {Array} array The array to inspect.
  7922. * @param {Function} [predicate=_.identity] The function invoked per iteration.
  7923. * @param {number} [fromIndex=array.length-1] The index to search from.
  7924. * @returns {number} Returns the index of the found element, else `-1`.
  7925. * @example
  7926. *
  7927. * var users = [
  7928. * { 'user': 'barney', 'active': true },
  7929. * { 'user': 'fred', 'active': false },
  7930. * { 'user': 'pebbles', 'active': false }
  7931. * ];
  7932. *
  7933. * _.findLastIndex(users, function(o) { return o.user == 'pebbles'; });
  7934. * // => 2
  7935. *
  7936. * // The `_.matches` iteratee shorthand.
  7937. * _.findLastIndex(users, { 'user': 'barney', 'active': true });
  7938. * // => 0
  7939. *
  7940. * // The `_.matchesProperty` iteratee shorthand.
  7941. * _.findLastIndex(users, ['active', false]);
  7942. * // => 2
  7943. *
  7944. * // The `_.property` iteratee shorthand.
  7945. * _.findLastIndex(users, 'active');
  7946. * // => 0
  7947. */
  7948. function findLastIndex(array, predicate, fromIndex) {
  7949. var length = array == null ? 0 : array.length;
  7950. if (!length) {
  7951. return -1;
  7952. }
  7953. var index = length - 1;
  7954. if (fromIndex !== undefined) {
  7955. index = toInteger(fromIndex);
  7956. index = fromIndex < 0
  7957. ? nativeMax(length + index, 0)
  7958. : nativeMin(index, length - 1);
  7959. }
  7960. return baseFindIndex(array, getIteratee(predicate, 3), index, true);
  7961. }
  7962. /**
  7963. * Flattens `array` a single level deep.
  7964. *
  7965. * @static
  7966. * @memberOf _
  7967. * @since 0.1.0
  7968. * @category Array
  7969. * @param {Array} array The array to flatten.
  7970. * @returns {Array} Returns the new flattened array.
  7971. * @example
  7972. *
  7973. * _.flatten([1, [2, [3, [4]], 5]]);
  7974. * // => [1, 2, [3, [4]], 5]
  7975. */
  7976. function flatten(array) {
  7977. var length = array == null ? 0 : array.length;
  7978. return length ? baseFlatten(array, 1) : [];
  7979. }
  7980. /**
  7981. * Recursively flattens `array`.
  7982. *
  7983. * @static
  7984. * @memberOf _
  7985. * @since 3.0.0
  7986. * @category Array
  7987. * @param {Array} array The array to flatten.
  7988. * @returns {Array} Returns the new flattened array.
  7989. * @example
  7990. *
  7991. * _.flattenDeep([1, [2, [3, [4]], 5]]);
  7992. * // => [1, 2, 3, 4, 5]
  7993. */
  7994. function flattenDeep(array) {
  7995. var length = array == null ? 0 : array.length;
  7996. return length ? baseFlatten(array, INFINITY) : [];
  7997. }
  7998. /**
  7999. * Recursively flatten `array` up to `depth` times.
  8000. *
  8001. * @static
  8002. * @memberOf _
  8003. * @since 4.4.0
  8004. * @category Array
  8005. * @param {Array} array The array to flatten.
  8006. * @param {number} [depth=1] The maximum recursion depth.
  8007. * @returns {Array} Returns the new flattened array.
  8008. * @example
  8009. *
  8010. * var array = [1, [2, [3, [4]], 5]];
  8011. *
  8012. * _.flattenDepth(array, 1);
  8013. * // => [1, 2, [3, [4]], 5]
  8014. *
  8015. * _.flattenDepth(array, 2);
  8016. * // => [1, 2, 3, [4], 5]
  8017. */
  8018. function flattenDepth(array, depth) {
  8019. var length = array == null ? 0 : array.length;
  8020. if (!length) {
  8021. return [];
  8022. }
  8023. depth = depth === undefined ? 1 : toInteger(depth);
  8024. return baseFlatten(array, depth);
  8025. }
  8026. /**
  8027. * The inverse of `_.toPairs`; this method returns an object composed
  8028. * from key-value `pairs`.
  8029. *
  8030. * @static
  8031. * @memberOf _
  8032. * @since 4.0.0
  8033. * @category Array
  8034. * @param {Array} pairs The key-value pairs.
  8035. * @returns {Object} Returns the new object.
  8036. * @example
  8037. *
  8038. * _.fromPairs([['a', 1], ['b', 2]]);
  8039. * // => { 'a': 1, 'b': 2 }
  8040. */
  8041. function fromPairs(pairs) {
  8042. var index = -1,
  8043. length = pairs == null ? 0 : pairs.length,
  8044. result = {};
  8045. while (++index < length) {
  8046. var pair = pairs[index];
  8047. result[pair[0]] = pair[1];
  8048. }
  8049. return result;
  8050. }
  8051. /**
  8052. * Gets the first element of `array`.
  8053. *
  8054. * @static
  8055. * @memberOf _
  8056. * @since 0.1.0
  8057. * @alias first
  8058. * @category Array
  8059. * @param {Array} array The array to query.
  8060. * @returns {*} Returns the first element of `array`.
  8061. * @example
  8062. *
  8063. * _.head([1, 2, 3]);
  8064. * // => 1
  8065. *
  8066. * _.head([]);
  8067. * // => undefined
  8068. */
  8069. function head(array) {
  8070. return (array && array.length) ? array[0] : undefined;
  8071. }
  8072. /**
  8073. * Gets the index at which the first occurrence of `value` is found in `array`
  8074. * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
  8075. * for equality comparisons. If `fromIndex` is negative, it's used as the
  8076. * offset from the end of `array`.
  8077. *
  8078. * @static
  8079. * @memberOf _
  8080. * @since 0.1.0
  8081. * @category Array
  8082. * @param {Array} array The array to inspect.
  8083. * @param {*} value The value to search for.
  8084. * @param {number} [fromIndex=0] The index to search from.
  8085. * @returns {number} Returns the index of the matched value, else `-1`.
  8086. * @example
  8087. *
  8088. * _.indexOf([1, 2, 1, 2], 2);
  8089. * // => 1
  8090. *
  8091. * // Search from the `fromIndex`.
  8092. * _.indexOf([1, 2, 1, 2], 2, 2);
  8093. * // => 3
  8094. */
  8095. function indexOf(array, value, fromIndex) {
  8096. var length = array == null ? 0 : array.length;
  8097. if (!length) {
  8098. return -1;
  8099. }
  8100. var index = fromIndex == null ? 0 : toInteger(fromIndex);
  8101. if (index < 0) {
  8102. index = nativeMax(length + index, 0);
  8103. }
  8104. return baseIndexOf(array, value, index);
  8105. }
  8106. /**
  8107. * Gets all but the last element of `array`.
  8108. *
  8109. * @static
  8110. * @memberOf _
  8111. * @since 0.1.0
  8112. * @category Array
  8113. * @param {Array} array The array to query.
  8114. * @returns {Array} Returns the slice of `array`.
  8115. * @example
  8116. *
  8117. * _.initial([1, 2, 3]);
  8118. * // => [1, 2]
  8119. */
  8120. function initial(array) {
  8121. var length = array == null ? 0 : array.length;
  8122. return length ? baseSlice(array, 0, -1) : [];
  8123. }
  8124. /**
  8125. * Creates an array of unique values that are included in all given arrays
  8126. * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
  8127. * for equality comparisons. The order and references of result values are
  8128. * determined by the first array.
  8129. *
  8130. * @static
  8131. * @memberOf _
  8132. * @since 0.1.0
  8133. * @category Array
  8134. * @param {...Array} [arrays] The arrays to inspect.
  8135. * @returns {Array} Returns the new array of intersecting values.
  8136. * @example
  8137. *
  8138. * _.intersection([2, 1], [2, 3]);
  8139. * // => [2]
  8140. */
  8141. var intersection = baseRest(function(arrays) {
  8142. var mapped = arrayMap(arrays, castArrayLikeObject);
  8143. return (mapped.length && mapped[0] === arrays[0])
  8144. ? baseIntersection(mapped)
  8145. : [];
  8146. });
  8147. /**
  8148. * This method is like `_.intersection` except that it accepts `iteratee`
  8149. * which is invoked for each element of each `arrays` to generate the criterion
  8150. * by which they're compared. The order and references of result values are
  8151. * determined by the first array. The iteratee is invoked with one argument:
  8152. * (value).
  8153. *
  8154. * @static
  8155. * @memberOf _
  8156. * @since 4.0.0
  8157. * @category Array
  8158. * @param {...Array} [arrays] The arrays to inspect.
  8159. * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
  8160. * @returns {Array} Returns the new array of intersecting values.
  8161. * @example
  8162. *
  8163. * _.intersectionBy([2.1, 1.2], [2.3, 3.4], Math.floor);
  8164. * // => [2.1]
  8165. *
  8166. * // The `_.property` iteratee shorthand.
  8167. * _.intersectionBy([{ 'x': 1 }], [{ 'x': 2 }, { 'x': 1 }], 'x');
  8168. * // => [{ 'x': 1 }]
  8169. */
  8170. var intersectionBy = baseRest(function(arrays) {
  8171. var iteratee = last(arrays),
  8172. mapped = arrayMap(arrays, castArrayLikeObject);
  8173. if (iteratee === last(mapped)) {
  8174. iteratee = undefined;
  8175. } else {
  8176. mapped.pop();
  8177. }
  8178. return (mapped.length && mapped[0] === arrays[0])
  8179. ? baseIntersection(mapped, getIteratee(iteratee, 2))
  8180. : [];
  8181. });
  8182. /**
  8183. * This method is like `_.intersection` except that it accepts `comparator`
  8184. * which is invoked to compare elements of `arrays`. The order and references
  8185. * of result values are determined by the first array. The comparator is
  8186. * invoked with two arguments: (arrVal, othVal).
  8187. *
  8188. * @static
  8189. * @memberOf _
  8190. * @since 4.0.0
  8191. * @category Array
  8192. * @param {...Array} [arrays] The arrays to inspect.
  8193. * @param {Function} [comparator] The comparator invoked per element.
  8194. * @returns {Array} Returns the new array of intersecting values.
  8195. * @example
  8196. *
  8197. * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }];
  8198. * var others = [{ 'x': 1, 'y': 1 }, { 'x': 1, 'y': 2 }];
  8199. *
  8200. * _.intersectionWith(objects, others, _.isEqual);
  8201. * // => [{ 'x': 1, 'y': 2 }]
  8202. */
  8203. var intersectionWith = baseRest(function(arrays) {
  8204. var comparator = last(arrays),
  8205. mapped = arrayMap(arrays, castArrayLikeObject);
  8206. comparator = typeof comparator == 'function' ? comparator : undefined;
  8207. if (comparator) {
  8208. mapped.pop();
  8209. }
  8210. return (mapped.length && mapped[0] === arrays[0])
  8211. ? baseIntersection(mapped, undefined, comparator)
  8212. : [];
  8213. });
  8214. /**
  8215. * Converts all elements in `array` into a string separated by `separator`.
  8216. *
  8217. * @static
  8218. * @memberOf _
  8219. * @since 4.0.0
  8220. * @category Array
  8221. * @param {Array} array The array to convert.
  8222. * @param {string} [separator=','] The element separator.
  8223. * @returns {string} Returns the joined string.
  8224. * @example
  8225. *
  8226. * _.join(['a', 'b', 'c'], '~');
  8227. * // => 'a~b~c'
  8228. */
  8229. function join(array, separator) {
  8230. return array == null ? '' : nativeJoin.call(array, separator);
  8231. }
  8232. /**
  8233. * Gets the last element of `array`.
  8234. *
  8235. * @static
  8236. * @memberOf _
  8237. * @since 0.1.0
  8238. * @category Array
  8239. * @param {Array} array The array to query.
  8240. * @returns {*} Returns the last element of `array`.
  8241. * @example
  8242. *
  8243. * _.last([1, 2, 3]);
  8244. * // => 3
  8245. */
  8246. function last(array) {
  8247. var length = array == null ? 0 : array.length;
  8248. return length ? array[length - 1] : undefined;
  8249. }
  8250. /**
  8251. * This method is like `_.indexOf` except that it iterates over elements of
  8252. * `array` from right to left.
  8253. *
  8254. * @static
  8255. * @memberOf _
  8256. * @since 0.1.0
  8257. * @category Array
  8258. * @param {Array} array The array to inspect.
  8259. * @param {*} value The value to search for.
  8260. * @param {number} [fromIndex=array.length-1] The index to search from.
  8261. * @returns {number} Returns the index of the matched value, else `-1`.
  8262. * @example
  8263. *
  8264. * _.lastIndexOf([1, 2, 1, 2], 2);
  8265. * // => 3
  8266. *
  8267. * // Search from the `fromIndex`.
  8268. * _.lastIndexOf([1, 2, 1, 2], 2, 2);
  8269. * // => 1
  8270. */
  8271. function lastIndexOf(array, value, fromIndex) {
  8272. var length = array == null ? 0 : array.length;
  8273. if (!length) {
  8274. return -1;
  8275. }
  8276. var index = length;
  8277. if (fromIndex !== undefined) {
  8278. index = toInteger(fromIndex);
  8279. index = index < 0 ? nativeMax(length + index, 0) : nativeMin(index, length - 1);
  8280. }
  8281. return value === value
  8282. ? strictLastIndexOf(array, value, index)
  8283. : baseFindIndex(array, baseIsNaN, index, true);
  8284. }
  8285. /**
  8286. * Gets the element at index `n` of `array`. If `n` is negative, the nth
  8287. * element from the end is returned.
  8288. *
  8289. * @static
  8290. * @memberOf _
  8291. * @since 4.11.0
  8292. * @category Array
  8293. * @param {Array} array The array to query.
  8294. * @param {number} [n=0] The index of the element to return.
  8295. * @returns {*} Returns the nth element of `array`.
  8296. * @example
  8297. *
  8298. * var array = ['a', 'b', 'c', 'd'];
  8299. *
  8300. * _.nth(array, 1);
  8301. * // => 'b'
  8302. *
  8303. * _.nth(array, -2);
  8304. * // => 'c';
  8305. */
  8306. function nth(array, n) {
  8307. return (array && array.length) ? baseNth(array, toInteger(n)) : undefined;
  8308. }
  8309. /**
  8310. * Removes all given values from `array` using
  8311. * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
  8312. * for equality comparisons.
  8313. *
  8314. * **Note:** Unlike `_.without`, this method mutates `array`. Use `_.remove`
  8315. * to remove elements from an array by predicate.
  8316. *
  8317. * @static
  8318. * @memberOf _
  8319. * @since 2.0.0
  8320. * @category Array
  8321. * @param {Array} array The array to modify.
  8322. * @param {...*} [values] The values to remove.
  8323. * @returns {Array} Returns `array`.
  8324. * @example
  8325. *
  8326. * var array = ['a', 'b', 'c', 'a', 'b', 'c'];
  8327. *
  8328. * _.pull(array, 'a', 'c');
  8329. * console.log(array);
  8330. * // => ['b', 'b']
  8331. */
  8332. var pull = baseRest(pullAll);
  8333. /**
  8334. * This method is like `_.pull` except that it accepts an array of values to remove.
  8335. *
  8336. * **Note:** Unlike `_.difference`, this method mutates `array`.
  8337. *
  8338. * @static
  8339. * @memberOf _
  8340. * @since 4.0.0
  8341. * @category Array
  8342. * @param {Array} array The array to modify.
  8343. * @param {Array} values The values to remove.
  8344. * @returns {Array} Returns `array`.
  8345. * @example
  8346. *
  8347. * var array = ['a', 'b', 'c', 'a', 'b', 'c'];
  8348. *
  8349. * _.pullAll(array, ['a', 'c']);
  8350. * console.log(array);
  8351. * // => ['b', 'b']
  8352. */
  8353. function pullAll(array, values) {
  8354. return (array && array.length && values && values.length)
  8355. ? basePullAll(array, values)
  8356. : array;
  8357. }
  8358. /**
  8359. * This method is like `_.pullAll` except that it accepts `iteratee` which is
  8360. * invoked for each element of `array` and `values` to generate the criterion
  8361. * by which they're compared. The iteratee is invoked with one argument: (value).
  8362. *
  8363. * **Note:** Unlike `_.differenceBy`, this method mutates `array`.
  8364. *
  8365. * @static
  8366. * @memberOf _
  8367. * @since 4.0.0
  8368. * @category Array
  8369. * @param {Array} array The array to modify.
  8370. * @param {Array} values The values to remove.
  8371. * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
  8372. * @returns {Array} Returns `array`.
  8373. * @example
  8374. *
  8375. * var array = [{ 'x': 1 }, { 'x': 2 }, { 'x': 3 }, { 'x': 1 }];
  8376. *
  8377. * _.pullAllBy(array, [{ 'x': 1 }, { 'x': 3 }], 'x');
  8378. * console.log(array);
  8379. * // => [{ 'x': 2 }]
  8380. */
  8381. function pullAllBy(array, values, iteratee) {
  8382. return (array && array.length && values && values.length)
  8383. ? basePullAll(array, values, getIteratee(iteratee, 2))
  8384. : array;
  8385. }
  8386. /**
  8387. * This method is like `_.pullAll` except that it accepts `comparator` which
  8388. * is invoked to compare elements of `array` to `values`. The comparator is
  8389. * invoked with two arguments: (arrVal, othVal).
  8390. *
  8391. * **Note:** Unlike `_.differenceWith`, this method mutates `array`.
  8392. *
  8393. * @static
  8394. * @memberOf _
  8395. * @since 4.6.0
  8396. * @category Array
  8397. * @param {Array} array The array to modify.
  8398. * @param {Array} values The values to remove.
  8399. * @param {Function} [comparator] The comparator invoked per element.
  8400. * @returns {Array} Returns `array`.
  8401. * @example
  8402. *
  8403. * var array = [{ 'x': 1, 'y': 2 }, { 'x': 3, 'y': 4 }, { 'x': 5, 'y': 6 }];
  8404. *
  8405. * _.pullAllWith(array, [{ 'x': 3, 'y': 4 }], _.isEqual);
  8406. * console.log(array);
  8407. * // => [{ 'x': 1, 'y': 2 }, { 'x': 5, 'y': 6 }]
  8408. */
  8409. function pullAllWith(array, values, comparator) {
  8410. return (array && array.length && values && values.length)
  8411. ? basePullAll(array, values, undefined, comparator)
  8412. : array;
  8413. }
  8414. /**
  8415. * Removes elements from `array` corresponding to `indexes` and returns an
  8416. * array of removed elements.
  8417. *
  8418. * **Note:** Unlike `_.at`, this method mutates `array`.
  8419. *
  8420. * @static
  8421. * @memberOf _
  8422. * @since 3.0.0
  8423. * @category Array
  8424. * @param {Array} array The array to modify.
  8425. * @param {...(number|number[])} [indexes] The indexes of elements to remove.
  8426. * @returns {Array} Returns the new array of removed elements.
  8427. * @example
  8428. *
  8429. * var array = ['a', 'b', 'c', 'd'];
  8430. * var pulled = _.pullAt(array, [1, 3]);
  8431. *
  8432. * console.log(array);
  8433. * // => ['a', 'c']
  8434. *
  8435. * console.log(pulled);
  8436. * // => ['b', 'd']
  8437. */
  8438. var pullAt = flatRest(function(array, indexes) {
  8439. var length = array == null ? 0 : array.length,
  8440. result = baseAt(array, indexes);
  8441. basePullAt(array, arrayMap(indexes, function(index) {
  8442. return isIndex(index, length) ? +index : index;
  8443. }).sort(compareAscending));
  8444. return result;
  8445. });
  8446. /**
  8447. * Removes all elements from `array` that `predicate` returns truthy for
  8448. * and returns an array of the removed elements. The predicate is invoked
  8449. * with three arguments: (value, index, array).
  8450. *
  8451. * **Note:** Unlike `_.filter`, this method mutates `array`. Use `_.pull`
  8452. * to pull elements from an array by value.
  8453. *
  8454. * @static
  8455. * @memberOf _
  8456. * @since 2.0.0
  8457. * @category Array
  8458. * @param {Array} array The array to modify.
  8459. * @param {Function} [predicate=_.identity] The function invoked per iteration.
  8460. * @returns {Array} Returns the new array of removed elements.
  8461. * @example
  8462. *
  8463. * var array = [1, 2, 3, 4];
  8464. * var evens = _.remove(array, function(n) {
  8465. * return n % 2 == 0;
  8466. * });
  8467. *
  8468. * console.log(array);
  8469. * // => [1, 3]
  8470. *
  8471. * console.log(evens);
  8472. * // => [2, 4]
  8473. */
  8474. function remove(array, predicate) {
  8475. var result = [];
  8476. if (!(array && array.length)) {
  8477. return result;
  8478. }
  8479. var index = -1,
  8480. indexes = [],
  8481. length = array.length;
  8482. predicate = getIteratee(predicate, 3);
  8483. while (++index < length) {
  8484. var value = array[index];
  8485. if (predicate(value, index, array)) {
  8486. result.push(value);
  8487. indexes.push(index);
  8488. }
  8489. }
  8490. basePullAt(array, indexes);
  8491. return result;
  8492. }
  8493. /**
  8494. * Reverses `array` so that the first element becomes the last, the second
  8495. * element becomes the second to last, and so on.
  8496. *
  8497. * **Note:** This method mutates `array` and is based on
  8498. * [`Array#reverse`](https://mdn.io/Array/reverse).
  8499. *
  8500. * @static
  8501. * @memberOf _
  8502. * @since 4.0.0
  8503. * @category Array
  8504. * @param {Array} array The array to modify.
  8505. * @returns {Array} Returns `array`.
  8506. * @example
  8507. *
  8508. * var array = [1, 2, 3];
  8509. *
  8510. * _.reverse(array);
  8511. * // => [3, 2, 1]
  8512. *
  8513. * console.log(array);
  8514. * // => [3, 2, 1]
  8515. */
  8516. function reverse(array) {
  8517. return array == null ? array : nativeReverse.call(array);
  8518. }
  8519. /**
  8520. * Creates a slice of `array` from `start` up to, but not including, `end`.
  8521. *
  8522. * **Note:** This method is used instead of
  8523. * [`Array#slice`](https://mdn.io/Array/slice) to ensure dense arrays are
  8524. * returned.
  8525. *
  8526. * @static
  8527. * @memberOf _
  8528. * @since 3.0.0
  8529. * @category Array
  8530. * @param {Array} array The array to slice.
  8531. * @param {number} [start=0] The start position.
  8532. * @param {number} [end=array.length] The end position.
  8533. * @returns {Array} Returns the slice of `array`.
  8534. */
  8535. function slice(array, start, end) {
  8536. var length = array == null ? 0 : array.length;
  8537. if (!length) {
  8538. return [];
  8539. }
  8540. if (end && typeof end != 'number' && isIterateeCall(array, start, end)) {
  8541. start = 0;
  8542. end = length;
  8543. }
  8544. else {
  8545. start = start == null ? 0 : toInteger(start);
  8546. end = end === undefined ? length : toInteger(end);
  8547. }
  8548. return baseSlice(array, start, end);
  8549. }
  8550. /**
  8551. * Uses a binary search to determine the lowest index at which `value`
  8552. * should be inserted into `array` in order to maintain its sort order.
  8553. *
  8554. * @static
  8555. * @memberOf _
  8556. * @since 0.1.0
  8557. * @category Array
  8558. * @param {Array} array The sorted array to inspect.
  8559. * @param {*} value The value to evaluate.
  8560. * @returns {number} Returns the index at which `value` should be inserted
  8561. * into `array`.
  8562. * @example
  8563. *
  8564. * _.sortedIndex([30, 50], 40);
  8565. * // => 1
  8566. */
  8567. function sortedIndex(array, value) {
  8568. return baseSortedIndex(array, value);
  8569. }
  8570. /**
  8571. * This method is like `_.sortedIndex` except that it accepts `iteratee`
  8572. * which is invoked for `value` and each element of `array` to compute their
  8573. * sort ranking. The iteratee is invoked with one argument: (value).
  8574. *
  8575. * @static
  8576. * @memberOf _
  8577. * @since 4.0.0
  8578. * @category Array
  8579. * @param {Array} array The sorted array to inspect.
  8580. * @param {*} value The value to evaluate.
  8581. * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
  8582. * @returns {number} Returns the index at which `value` should be inserted
  8583. * into `array`.
  8584. * @example
  8585. *
  8586. * var objects = [{ 'x': 4 }, { 'x': 5 }];
  8587. *
  8588. * _.sortedIndexBy(objects, { 'x': 4 }, function(o) { return o.x; });
  8589. * // => 0
  8590. *
  8591. * // The `_.property` iteratee shorthand.
  8592. * _.sortedIndexBy(objects, { 'x': 4 }, 'x');
  8593. * // => 0
  8594. */
  8595. function sortedIndexBy(array, value, iteratee) {
  8596. return baseSortedIndexBy(array, value, getIteratee(iteratee, 2));
  8597. }
  8598. /**
  8599. * This method is like `_.indexOf` except that it performs a binary
  8600. * search on a sorted `array`.
  8601. *
  8602. * @static
  8603. * @memberOf _
  8604. * @since 4.0.0
  8605. * @category Array
  8606. * @param {Array} array The array to inspect.
  8607. * @param {*} value The value to search for.
  8608. * @returns {number} Returns the index of the matched value, else `-1`.
  8609. * @example
  8610. *
  8611. * _.sortedIndexOf([4, 5, 5, 5, 6], 5);
  8612. * // => 1
  8613. */
  8614. function sortedIndexOf(array, value) {
  8615. var length = array == null ? 0 : array.length;
  8616. if (length) {
  8617. var index = baseSortedIndex(array, value);
  8618. if (index < length && eq(array[index], value)) {
  8619. return index;
  8620. }
  8621. }
  8622. return -1;
  8623. }
  8624. /**
  8625. * This method is like `_.sortedIndex` except that it returns the highest
  8626. * index at which `value` should be inserted into `array` in order to
  8627. * maintain its sort order.
  8628. *
  8629. * @static
  8630. * @memberOf _
  8631. * @since 3.0.0
  8632. * @category Array
  8633. * @param {Array} array The sorted array to inspect.
  8634. * @param {*} value The value to evaluate.
  8635. * @returns {number} Returns the index at which `value` should be inserted
  8636. * into `array`.
  8637. * @example
  8638. *
  8639. * _.sortedLastIndex([4, 5, 5, 5, 6], 5);
  8640. * // => 4
  8641. */
  8642. function sortedLastIndex(array, value) {
  8643. return baseSortedIndex(array, value, true);
  8644. }
  8645. /**
  8646. * This method is like `_.sortedLastIndex` except that it accepts `iteratee`
  8647. * which is invoked for `value` and each element of `array` to compute their
  8648. * sort ranking. The iteratee is invoked with one argument: (value).
  8649. *
  8650. * @static
  8651. * @memberOf _
  8652. * @since 4.0.0
  8653. * @category Array
  8654. * @param {Array} array The sorted array to inspect.
  8655. * @param {*} value The value to evaluate.
  8656. * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
  8657. * @returns {number} Returns the index at which `value` should be inserted
  8658. * into `array`.
  8659. * @example
  8660. *
  8661. * var objects = [{ 'x': 4 }, { 'x': 5 }];
  8662. *
  8663. * _.sortedLastIndexBy(objects, { 'x': 4 }, function(o) { return o.x; });
  8664. * // => 1
  8665. *
  8666. * // The `_.property` iteratee shorthand.
  8667. * _.sortedLastIndexBy(objects, { 'x': 4 }, 'x');
  8668. * // => 1
  8669. */
  8670. function sortedLastIndexBy(array, value, iteratee) {
  8671. return baseSortedIndexBy(array, value, getIteratee(iteratee, 2), true);
  8672. }
  8673. /**
  8674. * This method is like `_.lastIndexOf` except that it performs a binary
  8675. * search on a sorted `array`.
  8676. *
  8677. * @static
  8678. * @memberOf _
  8679. * @since 4.0.0
  8680. * @category Array
  8681. * @param {Array} array The array to inspect.
  8682. * @param {*} value The value to search for.
  8683. * @returns {number} Returns the index of the matched value, else `-1`.
  8684. * @example
  8685. *
  8686. * _.sortedLastIndexOf([4, 5, 5, 5, 6], 5);
  8687. * // => 3
  8688. */
  8689. function sortedLastIndexOf(array, value) {
  8690. var length = array == null ? 0 : array.length;
  8691. if (length) {
  8692. var index = baseSortedIndex(array, value, true) - 1;
  8693. if (eq(array[index], value)) {
  8694. return index;
  8695. }
  8696. }
  8697. return -1;
  8698. }
  8699. /**
  8700. * This method is like `_.uniq` except that it's designed and optimized
  8701. * for sorted arrays.
  8702. *
  8703. * @static
  8704. * @memberOf _
  8705. * @since 4.0.0
  8706. * @category Array
  8707. * @param {Array} array The array to inspect.
  8708. * @returns {Array} Returns the new duplicate free array.
  8709. * @example
  8710. *
  8711. * _.sortedUniq([1, 1, 2]);
  8712. * // => [1, 2]
  8713. */
  8714. function sortedUniq(array) {
  8715. return (array && array.length)
  8716. ? baseSortedUniq(array)
  8717. : [];
  8718. }
  8719. /**
  8720. * This method is like `_.uniqBy` except that it's designed and optimized
  8721. * for sorted arrays.
  8722. *
  8723. * @static
  8724. * @memberOf _
  8725. * @since 4.0.0
  8726. * @category Array
  8727. * @param {Array} array The array to inspect.
  8728. * @param {Function} [iteratee] The iteratee invoked per element.
  8729. * @returns {Array} Returns the new duplicate free array.
  8730. * @example
  8731. *
  8732. * _.sortedUniqBy([1.1, 1.2, 2.3, 2.4], Math.floor);
  8733. * // => [1.1, 2.3]
  8734. */
  8735. function sortedUniqBy(array, iteratee) {
  8736. return (array && array.length)
  8737. ? baseSortedUniq(array, getIteratee(iteratee, 2))
  8738. : [];
  8739. }
  8740. /**
  8741. * Gets all but the first element of `array`.
  8742. *
  8743. * @static
  8744. * @memberOf _
  8745. * @since 4.0.0
  8746. * @category Array
  8747. * @param {Array} array The array to query.
  8748. * @returns {Array} Returns the slice of `array`.
  8749. * @example
  8750. *
  8751. * _.tail([1, 2, 3]);
  8752. * // => [2, 3]
  8753. */
  8754. function tail(array) {
  8755. var length = array == null ? 0 : array.length;
  8756. return length ? baseSlice(array, 1, length) : [];
  8757. }
  8758. /**
  8759. * Creates a slice of `array` with `n` elements taken from the beginning.
  8760. *
  8761. * @static
  8762. * @memberOf _
  8763. * @since 0.1.0
  8764. * @category Array
  8765. * @param {Array} array The array to query.
  8766. * @param {number} [n=1] The number of elements to take.
  8767. * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
  8768. * @returns {Array} Returns the slice of `array`.
  8769. * @example
  8770. *
  8771. * _.take([1, 2, 3]);
  8772. * // => [1]
  8773. *
  8774. * _.take([1, 2, 3], 2);
  8775. * // => [1, 2]
  8776. *
  8777. * _.take([1, 2, 3], 5);
  8778. * // => [1, 2, 3]
  8779. *
  8780. * _.take([1, 2, 3], 0);
  8781. * // => []
  8782. */
  8783. function take(array, n, guard) {
  8784. if (!(array && array.length)) {
  8785. return [];
  8786. }
  8787. n = (guard || n === undefined) ? 1 : toInteger(n);
  8788. return baseSlice(array, 0, n < 0 ? 0 : n);
  8789. }
  8790. /**
  8791. * Creates a slice of `array` with `n` elements taken from the end.
  8792. *
  8793. * @static
  8794. * @memberOf _
  8795. * @since 3.0.0
  8796. * @category Array
  8797. * @param {Array} array The array to query.
  8798. * @param {number} [n=1] The number of elements to take.
  8799. * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
  8800. * @returns {Array} Returns the slice of `array`.
  8801. * @example
  8802. *
  8803. * _.takeRight([1, 2, 3]);
  8804. * // => [3]
  8805. *
  8806. * _.takeRight([1, 2, 3], 2);
  8807. * // => [2, 3]
  8808. *
  8809. * _.takeRight([1, 2, 3], 5);
  8810. * // => [1, 2, 3]
  8811. *
  8812. * _.takeRight([1, 2, 3], 0);
  8813. * // => []
  8814. */
  8815. function takeRight(array, n, guard) {
  8816. var length = array == null ? 0 : array.length;
  8817. if (!length) {
  8818. return [];
  8819. }
  8820. n = (guard || n === undefined) ? 1 : toInteger(n);
  8821. n = length - n;
  8822. return baseSlice(array, n < 0 ? 0 : n, length);
  8823. }
  8824. /**
  8825. * Creates a slice of `array` with elements taken from the end. Elements are
  8826. * taken until `predicate` returns falsey. The predicate is invoked with
  8827. * three arguments: (value, index, array).
  8828. *
  8829. * @static
  8830. * @memberOf _
  8831. * @since 3.0.0
  8832. * @category Array
  8833. * @param {Array} array The array to query.
  8834. * @param {Function} [predicate=_.identity] The function invoked per iteration.
  8835. * @returns {Array} Returns the slice of `array`.
  8836. * @example
  8837. *
  8838. * var users = [
  8839. * { 'user': 'barney', 'active': true },
  8840. * { 'user': 'fred', 'active': false },
  8841. * { 'user': 'pebbles', 'active': false }
  8842. * ];
  8843. *
  8844. * _.takeRightWhile(users, function(o) { return !o.active; });
  8845. * // => objects for ['fred', 'pebbles']
  8846. *
  8847. * // The `_.matches` iteratee shorthand.
  8848. * _.takeRightWhile(users, { 'user': 'pebbles', 'active': false });
  8849. * // => objects for ['pebbles']
  8850. *
  8851. * // The `_.matchesProperty` iteratee shorthand.
  8852. * _.takeRightWhile(users, ['active', false]);
  8853. * // => objects for ['fred', 'pebbles']
  8854. *
  8855. * // The `_.property` iteratee shorthand.
  8856. * _.takeRightWhile(users, 'active');
  8857. * // => []
  8858. */
  8859. function takeRightWhile(array, predicate) {
  8860. return (array && array.length)
  8861. ? baseWhile(array, getIteratee(predicate, 3), false, true)
  8862. : [];
  8863. }
  8864. /**
  8865. * Creates a slice of `array` with elements taken from the beginning. Elements
  8866. * are taken until `predicate` returns falsey. The predicate is invoked with
  8867. * three arguments: (value, index, array).
  8868. *
  8869. * @static
  8870. * @memberOf _
  8871. * @since 3.0.0
  8872. * @category Array
  8873. * @param {Array} array The array to query.
  8874. * @param {Function} [predicate=_.identity] The function invoked per iteration.
  8875. * @returns {Array} Returns the slice of `array`.
  8876. * @example
  8877. *
  8878. * var users = [
  8879. * { 'user': 'barney', 'active': false },
  8880. * { 'user': 'fred', 'active': false },
  8881. * { 'user': 'pebbles', 'active': true }
  8882. * ];
  8883. *
  8884. * _.takeWhile(users, function(o) { return !o.active; });
  8885. * // => objects for ['barney', 'fred']
  8886. *
  8887. * // The `_.matches` iteratee shorthand.
  8888. * _.takeWhile(users, { 'user': 'barney', 'active': false });
  8889. * // => objects for ['barney']
  8890. *
  8891. * // The `_.matchesProperty` iteratee shorthand.
  8892. * _.takeWhile(users, ['active', false]);
  8893. * // => objects for ['barney', 'fred']
  8894. *
  8895. * // The `_.property` iteratee shorthand.
  8896. * _.takeWhile(users, 'active');
  8897. * // => []
  8898. */
  8899. function takeWhile(array, predicate) {
  8900. return (array && array.length)
  8901. ? baseWhile(array, getIteratee(predicate, 3))
  8902. : [];
  8903. }
  8904. /**
  8905. * Creates an array of unique values, in order, from all given arrays using
  8906. * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
  8907. * for equality comparisons.
  8908. *
  8909. * @static
  8910. * @memberOf _
  8911. * @since 0.1.0
  8912. * @category Array
  8913. * @param {...Array} [arrays] The arrays to inspect.
  8914. * @returns {Array} Returns the new array of combined values.
  8915. * @example
  8916. *
  8917. * _.union([2], [1, 2]);
  8918. * // => [2, 1]
  8919. */
  8920. var union = baseRest(function(arrays) {
  8921. return baseUniq(baseFlatten(arrays, 1, isArrayLikeObject, true));
  8922. });
  8923. /**
  8924. * This method is like `_.union` except that it accepts `iteratee` which is
  8925. * invoked for each element of each `arrays` to generate the criterion by
  8926. * which uniqueness is computed. Result values are chosen from the first
  8927. * array in which the value occurs. The iteratee is invoked with one argument:
  8928. * (value).
  8929. *
  8930. * @static
  8931. * @memberOf _
  8932. * @since 4.0.0
  8933. * @category Array
  8934. * @param {...Array} [arrays] The arrays to inspect.
  8935. * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
  8936. * @returns {Array} Returns the new array of combined values.
  8937. * @example
  8938. *
  8939. * _.unionBy([2.1], [1.2, 2.3], Math.floor);
  8940. * // => [2.1, 1.2]
  8941. *
  8942. * // The `_.property` iteratee shorthand.
  8943. * _.unionBy([{ 'x': 1 }], [{ 'x': 2 }, { 'x': 1 }], 'x');
  8944. * // => [{ 'x': 1 }, { 'x': 2 }]
  8945. */
  8946. var unionBy = baseRest(function(arrays) {
  8947. var iteratee = last(arrays);
  8948. if (isArrayLikeObject(iteratee)) {
  8949. iteratee = undefined;
  8950. }
  8951. return baseUniq(baseFlatten(arrays, 1, isArrayLikeObject, true), getIteratee(iteratee, 2));
  8952. });
  8953. /**
  8954. * This method is like `_.union` except that it accepts `comparator` which
  8955. * is invoked to compare elements of `arrays`. Result values are chosen from
  8956. * the first array in which the value occurs. The comparator is invoked
  8957. * with two arguments: (arrVal, othVal).
  8958. *
  8959. * @static
  8960. * @memberOf _
  8961. * @since 4.0.0
  8962. * @category Array
  8963. * @param {...Array} [arrays] The arrays to inspect.
  8964. * @param {Function} [comparator] The comparator invoked per element.
  8965. * @returns {Array} Returns the new array of combined values.
  8966. * @example
  8967. *
  8968. * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }];
  8969. * var others = [{ 'x': 1, 'y': 1 }, { 'x': 1, 'y': 2 }];
  8970. *
  8971. * _.unionWith(objects, others, _.isEqual);
  8972. * // => [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }, { 'x': 1, 'y': 1 }]
  8973. */
  8974. var unionWith = baseRest(function(arrays) {
  8975. var comparator = last(arrays);
  8976. comparator = typeof comparator == 'function' ? comparator : undefined;
  8977. return baseUniq(baseFlatten(arrays, 1, isArrayLikeObject, true), undefined, comparator);
  8978. });
  8979. /**
  8980. * Creates a duplicate-free version of an array, using
  8981. * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
  8982. * for equality comparisons, in which only the first occurrence of each element
  8983. * is kept. The order of result values is determined by the order they occur
  8984. * in the array.
  8985. *
  8986. * @static
  8987. * @memberOf _
  8988. * @since 0.1.0
  8989. * @category Array
  8990. * @param {Array} array The array to inspect.
  8991. * @returns {Array} Returns the new duplicate free array.
  8992. * @example
  8993. *
  8994. * _.uniq([2, 1, 2]);
  8995. * // => [2, 1]
  8996. */
  8997. function uniq(array) {
  8998. return (array && array.length) ? baseUniq(array) : [];
  8999. }
  9000. /**
  9001. * This method is like `_.uniq` except that it accepts `iteratee` which is
  9002. * invoked for each element in `array` to generate the criterion by which
  9003. * uniqueness is computed. The order of result values is determined by the
  9004. * order they occur in the array. The iteratee is invoked with one argument:
  9005. * (value).
  9006. *
  9007. * @static
  9008. * @memberOf _
  9009. * @since 4.0.0
  9010. * @category Array
  9011. * @param {Array} array The array to inspect.
  9012. * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
  9013. * @returns {Array} Returns the new duplicate free array.
  9014. * @example
  9015. *
  9016. * _.uniqBy([2.1, 1.2, 2.3], Math.floor);
  9017. * // => [2.1, 1.2]
  9018. *
  9019. * // The `_.property` iteratee shorthand.
  9020. * _.uniqBy([{ 'x': 1 }, { 'x': 2 }, { 'x': 1 }], 'x');
  9021. * // => [{ 'x': 1 }, { 'x': 2 }]
  9022. */
  9023. function uniqBy(array, iteratee) {
  9024. return (array && array.length) ? baseUniq(array, getIteratee(iteratee, 2)) : [];
  9025. }
  9026. /**
  9027. * This method is like `_.uniq` except that it accepts `comparator` which
  9028. * is invoked to compare elements of `array`. The order of result values is
  9029. * determined by the order they occur in the array.The comparator is invoked
  9030. * with two arguments: (arrVal, othVal).
  9031. *
  9032. * @static
  9033. * @memberOf _
  9034. * @since 4.0.0
  9035. * @category Array
  9036. * @param {Array} array The array to inspect.
  9037. * @param {Function} [comparator] The comparator invoked per element.
  9038. * @returns {Array} Returns the new duplicate free array.
  9039. * @example
  9040. *
  9041. * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }, { 'x': 1, 'y': 2 }];
  9042. *
  9043. * _.uniqWith(objects, _.isEqual);
  9044. * // => [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }]
  9045. */
  9046. function uniqWith(array, comparator) {
  9047. comparator = typeof comparator == 'function' ? comparator : undefined;
  9048. return (array && array.length) ? baseUniq(array, undefined, comparator) : [];
  9049. }
  9050. /**
  9051. * This method is like `_.zip` except that it accepts an array of grouped
  9052. * elements and creates an array regrouping the elements to their pre-zip
  9053. * configuration.
  9054. *
  9055. * @static
  9056. * @memberOf _
  9057. * @since 1.2.0
  9058. * @category Array
  9059. * @param {Array} array The array of grouped elements to process.
  9060. * @returns {Array} Returns the new array of regrouped elements.
  9061. * @example
  9062. *
  9063. * var zipped = _.zip(['a', 'b'], [1, 2], [true, false]);
  9064. * // => [['a', 1, true], ['b', 2, false]]
  9065. *
  9066. * _.unzip(zipped);
  9067. * // => [['a', 'b'], [1, 2], [true, false]]
  9068. */
  9069. function unzip(array) {
  9070. if (!(array && array.length)) {
  9071. return [];
  9072. }
  9073. var length = 0;
  9074. array = arrayFilter(array, function(group) {
  9075. if (isArrayLikeObject(group)) {
  9076. length = nativeMax(group.length, length);
  9077. return true;
  9078. }
  9079. });
  9080. return baseTimes(length, function(index) {
  9081. return arrayMap(array, baseProperty(index));
  9082. });
  9083. }
  9084. /**
  9085. * This method is like `_.unzip` except that it accepts `iteratee` to specify
  9086. * how regrouped values should be combined. The iteratee is invoked with the
  9087. * elements of each group: (...group).
  9088. *
  9089. * @static
  9090. * @memberOf _
  9091. * @since 3.8.0
  9092. * @category Array
  9093. * @param {Array} array The array of grouped elements to process.
  9094. * @param {Function} [iteratee=_.identity] The function to combine
  9095. * regrouped values.
  9096. * @returns {Array} Returns the new array of regrouped elements.
  9097. * @example
  9098. *
  9099. * var zipped = _.zip([1, 2], [10, 20], [100, 200]);
  9100. * // => [[1, 10, 100], [2, 20, 200]]
  9101. *
  9102. * _.unzipWith(zipped, _.add);
  9103. * // => [3, 30, 300]
  9104. */
  9105. function unzipWith(array, iteratee) {
  9106. if (!(array && array.length)) {
  9107. return [];
  9108. }
  9109. var result = unzip(array);
  9110. if (iteratee == null) {
  9111. return result;
  9112. }
  9113. return arrayMap(result, function(group) {
  9114. return apply(iteratee, undefined, group);
  9115. });
  9116. }
  9117. /**
  9118. * Creates an array excluding all given values using
  9119. * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
  9120. * for equality comparisons.
  9121. *
  9122. * **Note:** Unlike `_.pull`, this method returns a new array.
  9123. *
  9124. * @static
  9125. * @memberOf _
  9126. * @since 0.1.0
  9127. * @category Array
  9128. * @param {Array} array The array to inspect.
  9129. * @param {...*} [values] The values to exclude.
  9130. * @returns {Array} Returns the new array of filtered values.
  9131. * @see _.difference, _.xor
  9132. * @example
  9133. *
  9134. * _.without([2, 1, 2, 3], 1, 2);
  9135. * // => [3]
  9136. */
  9137. var without = baseRest(function(array, values) {
  9138. return isArrayLikeObject(array)
  9139. ? baseDifference(array, values)
  9140. : [];
  9141. });
  9142. /**
  9143. * Creates an array of unique values that is the
  9144. * [symmetric difference](https://en.wikipedia.org/wiki/Symmetric_difference)
  9145. * of the given arrays. The order of result values is determined by the order
  9146. * they occur in the arrays.
  9147. *
  9148. * @static
  9149. * @memberOf _
  9150. * @since 2.4.0
  9151. * @category Array
  9152. * @param {...Array} [arrays] The arrays to inspect.
  9153. * @returns {Array} Returns the new array of filtered values.
  9154. * @see _.difference, _.without
  9155. * @example
  9156. *
  9157. * _.xor([2, 1], [2, 3]);
  9158. * // => [1, 3]
  9159. */
  9160. var xor = baseRest(function(arrays) {
  9161. return baseXor(arrayFilter(arrays, isArrayLikeObject));
  9162. });
  9163. /**
  9164. * This method is like `_.xor` except that it accepts `iteratee` which is
  9165. * invoked for each element of each `arrays` to generate the criterion by
  9166. * which by which they're compared. The order of result values is determined
  9167. * by the order they occur in the arrays. The iteratee is invoked with one
  9168. * argument: (value).
  9169. *
  9170. * @static
  9171. * @memberOf _
  9172. * @since 4.0.0
  9173. * @category Array
  9174. * @param {...Array} [arrays] The arrays to inspect.
  9175. * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
  9176. * @returns {Array} Returns the new array of filtered values.
  9177. * @example
  9178. *
  9179. * _.xorBy([2.1, 1.2], [2.3, 3.4], Math.floor);
  9180. * // => [1.2, 3.4]
  9181. *
  9182. * // The `_.property` iteratee shorthand.
  9183. * _.xorBy([{ 'x': 1 }], [{ 'x': 2 }, { 'x': 1 }], 'x');
  9184. * // => [{ 'x': 2 }]
  9185. */
  9186. var xorBy = baseRest(function(arrays) {
  9187. var iteratee = last(arrays);
  9188. if (isArrayLikeObject(iteratee)) {
  9189. iteratee = undefined;
  9190. }
  9191. return baseXor(arrayFilter(arrays, isArrayLikeObject), getIteratee(iteratee, 2));
  9192. });
  9193. /**
  9194. * This method is like `_.xor` except that it accepts `comparator` which is
  9195. * invoked to compare elements of `arrays`. The order of result values is
  9196. * determined by the order they occur in the arrays. The comparator is invoked
  9197. * with two arguments: (arrVal, othVal).
  9198. *
  9199. * @static
  9200. * @memberOf _
  9201. * @since 4.0.0
  9202. * @category Array
  9203. * @param {...Array} [arrays] The arrays to inspect.
  9204. * @param {Function} [comparator] The comparator invoked per element.
  9205. * @returns {Array} Returns the new array of filtered values.
  9206. * @example
  9207. *
  9208. * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }];
  9209. * var others = [{ 'x': 1, 'y': 1 }, { 'x': 1, 'y': 2 }];
  9210. *
  9211. * _.xorWith(objects, others, _.isEqual);
  9212. * // => [{ 'x': 2, 'y': 1 }, { 'x': 1, 'y': 1 }]
  9213. */
  9214. var xorWith = baseRest(function(arrays) {
  9215. var comparator = last(arrays);
  9216. comparator = typeof comparator == 'function' ? comparator : undefined;
  9217. return baseXor(arrayFilter(arrays, isArrayLikeObject), undefined, comparator);
  9218. });
  9219. /**
  9220. * Creates an array of grouped elements, the first of which contains the
  9221. * first elements of the given arrays, the second of which contains the
  9222. * second elements of the given arrays, and so on.
  9223. *
  9224. * @static
  9225. * @memberOf _
  9226. * @since 0.1.0
  9227. * @category Array
  9228. * @param {...Array} [arrays] The arrays to process.
  9229. * @returns {Array} Returns the new array of grouped elements.
  9230. * @example
  9231. *
  9232. * _.zip(['a', 'b'], [1, 2], [true, false]);
  9233. * // => [['a', 1, true], ['b', 2, false]]
  9234. */
  9235. var zip = baseRest(unzip);
  9236. /**
  9237. * This method is like `_.fromPairs` except that it accepts two arrays,
  9238. * one of property identifiers and one of corresponding values.
  9239. *
  9240. * @static
  9241. * @memberOf _
  9242. * @since 0.4.0
  9243. * @category Array
  9244. * @param {Array} [props=[]] The property identifiers.
  9245. * @param {Array} [values=[]] The property values.
  9246. * @returns {Object} Returns the new object.
  9247. * @example
  9248. *
  9249. * _.zipObject(['a', 'b'], [1, 2]);
  9250. * // => { 'a': 1, 'b': 2 }
  9251. */
  9252. function zipObject(props, values) {
  9253. return baseZipObject(props || [], values || [], assignValue);
  9254. }
  9255. /**
  9256. * This method is like `_.zipObject` except that it supports property paths.
  9257. *
  9258. * @static
  9259. * @memberOf _
  9260. * @since 4.1.0
  9261. * @category Array
  9262. * @param {Array} [props=[]] The property identifiers.
  9263. * @param {Array} [values=[]] The property values.
  9264. * @returns {Object} Returns the new object.
  9265. * @example
  9266. *
  9267. * _.zipObjectDeep(['a.b[0].c', 'a.b[1].d'], [1, 2]);
  9268. * // => { 'a': { 'b': [{ 'c': 1 }, { 'd': 2 }] } }
  9269. */
  9270. function zipObjectDeep(props, values) {
  9271. return baseZipObject(props || [], values || [], baseSet);
  9272. }
  9273. /**
  9274. * This method is like `_.zip` except that it accepts `iteratee` to specify
  9275. * how grouped values should be combined. The iteratee is invoked with the
  9276. * elements of each group: (...group).
  9277. *
  9278. * @static
  9279. * @memberOf _
  9280. * @since 3.8.0
  9281. * @category Array
  9282. * @param {...Array} [arrays] The arrays to process.
  9283. * @param {Function} [iteratee=_.identity] The function to combine
  9284. * grouped values.
  9285. * @returns {Array} Returns the new array of grouped elements.
  9286. * @example
  9287. *
  9288. * _.zipWith([1, 2], [10, 20], [100, 200], function(a, b, c) {
  9289. * return a + b + c;
  9290. * });
  9291. * // => [111, 222]
  9292. */
  9293. var zipWith = baseRest(function(arrays) {
  9294. var length = arrays.length,
  9295. iteratee = length > 1 ? arrays[length - 1] : undefined;
  9296. iteratee = typeof iteratee == 'function' ? (arrays.pop(), iteratee) : undefined;
  9297. return unzipWith(arrays, iteratee);
  9298. });
  9299. /*------------------------------------------------------------------------*/
  9300. /**
  9301. * Creates a `lodash` wrapper instance that wraps `value` with explicit method
  9302. * chain sequences enabled. The result of such sequences must be unwrapped
  9303. * with `_#value`.
  9304. *
  9305. * @static
  9306. * @memberOf _
  9307. * @since 1.3.0
  9308. * @category Seq
  9309. * @param {*} value The value to wrap.
  9310. * @returns {Object} Returns the new `lodash` wrapper instance.
  9311. * @example
  9312. *
  9313. * var users = [
  9314. * { 'user': 'barney', 'age': 36 },
  9315. * { 'user': 'fred', 'age': 40 },
  9316. * { 'user': 'pebbles', 'age': 1 }
  9317. * ];
  9318. *
  9319. * var youngest = _
  9320. * .chain(users)
  9321. * .sortBy('age')
  9322. * .map(function(o) {
  9323. * return o.user + ' is ' + o.age;
  9324. * })
  9325. * .head()
  9326. * .value();
  9327. * // => 'pebbles is 1'
  9328. */
  9329. function chain(value) {
  9330. var result = lodash(value);
  9331. result.__chain__ = true;
  9332. return result;
  9333. }
  9334. /**
  9335. * This method invokes `interceptor` and returns `value`. The interceptor
  9336. * is invoked with one argument; (value). The purpose of this method is to
  9337. * "tap into" a method chain sequence in order to modify intermediate results.
  9338. *
  9339. * @static
  9340. * @memberOf _
  9341. * @since 0.1.0
  9342. * @category Seq
  9343. * @param {*} value The value to provide to `interceptor`.
  9344. * @param {Function} interceptor The function to invoke.
  9345. * @returns {*} Returns `value`.
  9346. * @example
  9347. *
  9348. * _([1, 2, 3])
  9349. * .tap(function(array) {
  9350. * // Mutate input array.
  9351. * array.pop();
  9352. * })
  9353. * .reverse()
  9354. * .value();
  9355. * // => [2, 1]
  9356. */
  9357. function tap(value, interceptor) {
  9358. interceptor(value);
  9359. return value;
  9360. }
  9361. /**
  9362. * This method is like `_.tap` except that it returns the result of `interceptor`.
  9363. * The purpose of this method is to "pass thru" values replacing intermediate
  9364. * results in a method chain sequence.
  9365. *
  9366. * @static
  9367. * @memberOf _
  9368. * @since 3.0.0
  9369. * @category Seq
  9370. * @param {*} value The value to provide to `interceptor`.
  9371. * @param {Function} interceptor The function to invoke.
  9372. * @returns {*} Returns the result of `interceptor`.
  9373. * @example
  9374. *
  9375. * _(' abc ')
  9376. * .chain()
  9377. * .trim()
  9378. * .thru(function(value) {
  9379. * return [value];
  9380. * })
  9381. * .value();
  9382. * // => ['abc']
  9383. */
  9384. function thru(value, interceptor) {
  9385. return interceptor(value);
  9386. }
  9387. /**
  9388. * This method is the wrapper version of `_.at`.
  9389. *
  9390. * @name at
  9391. * @memberOf _
  9392. * @since 1.0.0
  9393. * @category Seq
  9394. * @param {...(string|string[])} [paths] The property paths to pick.
  9395. * @returns {Object} Returns the new `lodash` wrapper instance.
  9396. * @example
  9397. *
  9398. * var object = { 'a': [{ 'b': { 'c': 3 } }, 4] };
  9399. *
  9400. * _(object).at(['a[0].b.c', 'a[1]']).value();
  9401. * // => [3, 4]
  9402. */
  9403. var wrapperAt = flatRest(function(paths) {
  9404. var length = paths.length,
  9405. start = length ? paths[0] : 0,
  9406. value = this.__wrapped__,
  9407. interceptor = function(object) { return baseAt(object, paths); };
  9408. if (length > 1 || this.__actions__.length ||
  9409. !(value instanceof LazyWrapper) || !isIndex(start)) {
  9410. return this.thru(interceptor);
  9411. }
  9412. value = value.slice(start, +start + (length ? 1 : 0));
  9413. value.__actions__.push({
  9414. 'func': thru,
  9415. 'args': [interceptor],
  9416. 'thisArg': undefined
  9417. });
  9418. return new LodashWrapper(value, this.__chain__).thru(function(array) {
  9419. if (length && !array.length) {
  9420. array.push(undefined);
  9421. }
  9422. return array;
  9423. });
  9424. });
  9425. /**
  9426. * Creates a `lodash` wrapper instance with explicit method chain sequences enabled.
  9427. *
  9428. * @name chain
  9429. * @memberOf _
  9430. * @since 0.1.0
  9431. * @category Seq
  9432. * @returns {Object} Returns the new `lodash` wrapper instance.
  9433. * @example
  9434. *
  9435. * var users = [
  9436. * { 'user': 'barney', 'age': 36 },
  9437. * { 'user': 'fred', 'age': 40 }
  9438. * ];
  9439. *
  9440. * // A sequence without explicit chaining.
  9441. * _(users).head();
  9442. * // => { 'user': 'barney', 'age': 36 }
  9443. *
  9444. * // A sequence with explicit chaining.
  9445. * _(users)
  9446. * .chain()
  9447. * .head()
  9448. * .pick('user')
  9449. * .value();
  9450. * // => { 'user': 'barney' }
  9451. */
  9452. function wrapperChain() {
  9453. return chain(this);
  9454. }
  9455. /**
  9456. * Executes the chain sequence and returns the wrapped result.
  9457. *
  9458. * @name commit
  9459. * @memberOf _
  9460. * @since 3.2.0
  9461. * @category Seq
  9462. * @returns {Object} Returns the new `lodash` wrapper instance.
  9463. * @example
  9464. *
  9465. * var array = [1, 2];
  9466. * var wrapped = _(array).push(3);
  9467. *
  9468. * console.log(array);
  9469. * // => [1, 2]
  9470. *
  9471. * wrapped = wrapped.commit();
  9472. * console.log(array);
  9473. * // => [1, 2, 3]
  9474. *
  9475. * wrapped.last();
  9476. * // => 3
  9477. *
  9478. * console.log(array);
  9479. * // => [1, 2, 3]
  9480. */
  9481. function wrapperCommit() {
  9482. return new LodashWrapper(this.value(), this.__chain__);
  9483. }
  9484. /**
  9485. * Gets the next value on a wrapped object following the
  9486. * [iterator protocol](https://mdn.io/iteration_protocols#iterator).
  9487. *
  9488. * @name next
  9489. * @memberOf _
  9490. * @since 4.0.0
  9491. * @category Seq
  9492. * @returns {Object} Returns the next iterator value.
  9493. * @example
  9494. *
  9495. * var wrapped = _([1, 2]);
  9496. *
  9497. * wrapped.next();
  9498. * // => { 'done': false, 'value': 1 }
  9499. *
  9500. * wrapped.next();
  9501. * // => { 'done': false, 'value': 2 }
  9502. *
  9503. * wrapped.next();
  9504. * // => { 'done': true, 'value': undefined }
  9505. */
  9506. function wrapperNext() {
  9507. if (this.__values__ === undefined) {
  9508. this.__values__ = toArray(this.value());
  9509. }
  9510. var done = this.__index__ >= this.__values__.length,
  9511. value = done ? undefined : this.__values__[this.__index__++];
  9512. return { 'done': done, 'value': value };
  9513. }
  9514. /**
  9515. * Enables the wrapper to be iterable.
  9516. *
  9517. * @name Symbol.iterator
  9518. * @memberOf _
  9519. * @since 4.0.0
  9520. * @category Seq
  9521. * @returns {Object} Returns the wrapper object.
  9522. * @example
  9523. *
  9524. * var wrapped = _([1, 2]);
  9525. *
  9526. * wrapped[Symbol.iterator]() === wrapped;
  9527. * // => true
  9528. *
  9529. * Array.from(wrapped);
  9530. * // => [1, 2]
  9531. */
  9532. function wrapperToIterator() {
  9533. return this;
  9534. }
  9535. /**
  9536. * Creates a clone of the chain sequence planting `value` as the wrapped value.
  9537. *
  9538. * @name plant
  9539. * @memberOf _
  9540. * @since 3.2.0
  9541. * @category Seq
  9542. * @param {*} value The value to plant.
  9543. * @returns {Object} Returns the new `lodash` wrapper instance.
  9544. * @example
  9545. *
  9546. * function square(n) {
  9547. * return n * n;
  9548. * }
  9549. *
  9550. * var wrapped = _([1, 2]).map(square);
  9551. * var other = wrapped.plant([3, 4]);
  9552. *
  9553. * other.value();
  9554. * // => [9, 16]
  9555. *
  9556. * wrapped.value();
  9557. * // => [1, 4]
  9558. */
  9559. function wrapperPlant(value) {
  9560. var result,
  9561. parent = this;
  9562. while (parent instanceof baseLodash) {
  9563. var clone = wrapperClone(parent);
  9564. clone.__index__ = 0;
  9565. clone.__values__ = undefined;
  9566. if (result) {
  9567. previous.__wrapped__ = clone;
  9568. } else {
  9569. result = clone;
  9570. }
  9571. var previous = clone;
  9572. parent = parent.__wrapped__;
  9573. }
  9574. previous.__wrapped__ = value;
  9575. return result;
  9576. }
  9577. /**
  9578. * This method is the wrapper version of `_.reverse`.
  9579. *
  9580. * **Note:** This method mutates the wrapped array.
  9581. *
  9582. * @name reverse
  9583. * @memberOf _
  9584. * @since 0.1.0
  9585. * @category Seq
  9586. * @returns {Object} Returns the new `lodash` wrapper instance.
  9587. * @example
  9588. *
  9589. * var array = [1, 2, 3];
  9590. *
  9591. * _(array).reverse().value()
  9592. * // => [3, 2, 1]
  9593. *
  9594. * console.log(array);
  9595. * // => [3, 2, 1]
  9596. */
  9597. function wrapperReverse() {
  9598. var value = this.__wrapped__;
  9599. if (value instanceof LazyWrapper) {
  9600. var wrapped = value;
  9601. if (this.__actions__.length) {
  9602. wrapped = new LazyWrapper(this);
  9603. }
  9604. wrapped = wrapped.reverse();
  9605. wrapped.__actions__.push({
  9606. 'func': thru,
  9607. 'args': [reverse],
  9608. 'thisArg': undefined
  9609. });
  9610. return new LodashWrapper(wrapped, this.__chain__);
  9611. }
  9612. return this.thru(reverse);
  9613. }
  9614. /**
  9615. * Executes the chain sequence to resolve the unwrapped value.
  9616. *
  9617. * @name value
  9618. * @memberOf _
  9619. * @since 0.1.0
  9620. * @alias toJSON, valueOf
  9621. * @category Seq
  9622. * @returns {*} Returns the resolved unwrapped value.
  9623. * @example
  9624. *
  9625. * _([1, 2, 3]).value();
  9626. * // => [1, 2, 3]
  9627. */
  9628. function wrapperValue() {
  9629. return baseWrapperValue(this.__wrapped__, this.__actions__);
  9630. }
  9631. /*------------------------------------------------------------------------*/
  9632. /**
  9633. * Creates an object composed of keys generated from the results of running
  9634. * each element of `collection` thru `iteratee`. The corresponding value of
  9635. * each key is the number of times the key was returned by `iteratee`. The
  9636. * iteratee is invoked with one argument: (value).
  9637. *
  9638. * @static
  9639. * @memberOf _
  9640. * @since 0.5.0
  9641. * @category Collection
  9642. * @param {Array|Object} collection The collection to iterate over.
  9643. * @param {Function} [iteratee=_.identity] The iteratee to transform keys.
  9644. * @returns {Object} Returns the composed aggregate object.
  9645. * @example
  9646. *
  9647. * _.countBy([6.1, 4.2, 6.3], Math.floor);
  9648. * // => { '4': 1, '6': 2 }
  9649. *
  9650. * // The `_.property` iteratee shorthand.
  9651. * _.countBy(['one', 'two', 'three'], 'length');
  9652. * // => { '3': 2, '5': 1 }
  9653. */
  9654. var countBy = createAggregator(function(result, value, key) {
  9655. if (hasOwnProperty.call(result, key)) {
  9656. ++result[key];
  9657. } else {
  9658. baseAssignValue(result, key, 1);
  9659. }
  9660. });
  9661. /**
  9662. * Checks if `predicate` returns truthy for **all** elements of `collection`.
  9663. * Iteration is stopped once `predicate` returns falsey. The predicate is
  9664. * invoked with three arguments: (value, index|key, collection).
  9665. *
  9666. * **Note:** This method returns `true` for
  9667. * [empty collections](https://en.wikipedia.org/wiki/Empty_set) because
  9668. * [everything is true](https://en.wikipedia.org/wiki/Vacuous_truth) of
  9669. * elements of empty collections.
  9670. *
  9671. * @static
  9672. * @memberOf _
  9673. * @since 0.1.0
  9674. * @category Collection
  9675. * @param {Array|Object} collection The collection to iterate over.
  9676. * @param {Function} [predicate=_.identity] The function invoked per iteration.
  9677. * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
  9678. * @returns {boolean} Returns `true` if all elements pass the predicate check,
  9679. * else `false`.
  9680. * @example
  9681. *
  9682. * _.every([true, 1, null, 'yes'], Boolean);
  9683. * // => false
  9684. *
  9685. * var users = [
  9686. * { 'user': 'barney', 'age': 36, 'active': false },
  9687. * { 'user': 'fred', 'age': 40, 'active': false }
  9688. * ];
  9689. *
  9690. * // The `_.matches` iteratee shorthand.
  9691. * _.every(users, { 'user': 'barney', 'active': false });
  9692. * // => false
  9693. *
  9694. * // The `_.matchesProperty` iteratee shorthand.
  9695. * _.every(users, ['active', false]);
  9696. * // => true
  9697. *
  9698. * // The `_.property` iteratee shorthand.
  9699. * _.every(users, 'active');
  9700. * // => false
  9701. */
  9702. function every(collection, predicate, guard) {
  9703. var func = isArray(collection) ? arrayEvery : baseEvery;
  9704. if (guard && isIterateeCall(collection, predicate, guard)) {
  9705. predicate = undefined;
  9706. }
  9707. return func(collection, getIteratee(predicate, 3));
  9708. }
  9709. /**
  9710. * Iterates over elements of `collection`, returning an array of all elements
  9711. * `predicate` returns truthy for. The predicate is invoked with three
  9712. * arguments: (value, index|key, collection).
  9713. *
  9714. * **Note:** Unlike `_.remove`, this method returns a new array.
  9715. *
  9716. * @static
  9717. * @memberOf _
  9718. * @since 0.1.0
  9719. * @category Collection
  9720. * @param {Array|Object} collection The collection to iterate over.
  9721. * @param {Function} [predicate=_.identity] The function invoked per iteration.
  9722. * @returns {Array} Returns the new filtered array.
  9723. * @see _.reject
  9724. * @example
  9725. *
  9726. * var users = [
  9727. * { 'user': 'barney', 'age': 36, 'active': true },
  9728. * { 'user': 'fred', 'age': 40, 'active': false }
  9729. * ];
  9730. *
  9731. * _.filter(users, function(o) { return !o.active; });
  9732. * // => objects for ['fred']
  9733. *
  9734. * // The `_.matches` iteratee shorthand.
  9735. * _.filter(users, { 'age': 36, 'active': true });
  9736. * // => objects for ['barney']
  9737. *
  9738. * // The `_.matchesProperty` iteratee shorthand.
  9739. * _.filter(users, ['active', false]);
  9740. * // => objects for ['fred']
  9741. *
  9742. * // The `_.property` iteratee shorthand.
  9743. * _.filter(users, 'active');
  9744. * // => objects for ['barney']
  9745. */
  9746. function filter(collection, predicate) {
  9747. var func = isArray(collection) ? arrayFilter : baseFilter;
  9748. return func(collection, getIteratee(predicate, 3));
  9749. }
  9750. /**
  9751. * Iterates over elements of `collection`, returning the first element
  9752. * `predicate` returns truthy for. The predicate is invoked with three
  9753. * arguments: (value, index|key, collection).
  9754. *
  9755. * @static
  9756. * @memberOf _
  9757. * @since 0.1.0
  9758. * @category Collection
  9759. * @param {Array|Object} collection The collection to inspect.
  9760. * @param {Function} [predicate=_.identity] The function invoked per iteration.
  9761. * @param {number} [fromIndex=0] The index to search from.
  9762. * @returns {*} Returns the matched element, else `undefined`.
  9763. * @example
  9764. *
  9765. * var users = [
  9766. * { 'user': 'barney', 'age': 36, 'active': true },
  9767. * { 'user': 'fred', 'age': 40, 'active': false },
  9768. * { 'user': 'pebbles', 'age': 1, 'active': true }
  9769. * ];
  9770. *
  9771. * _.find(users, function(o) { return o.age < 40; });
  9772. * // => object for 'barney'
  9773. *
  9774. * // The `_.matches` iteratee shorthand.
  9775. * _.find(users, { 'age': 1, 'active': true });
  9776. * // => object for 'pebbles'
  9777. *
  9778. * // The `_.matchesProperty` iteratee shorthand.
  9779. * _.find(users, ['active', false]);
  9780. * // => object for 'fred'
  9781. *
  9782. * // The `_.property` iteratee shorthand.
  9783. * _.find(users, 'active');
  9784. * // => object for 'barney'
  9785. */
  9786. var find = createFind(findIndex);
  9787. /**
  9788. * This method is like `_.find` except that it iterates over elements of
  9789. * `collection` from right to left.
  9790. *
  9791. * @static
  9792. * @memberOf _
  9793. * @since 2.0.0
  9794. * @category Collection
  9795. * @param {Array|Object} collection The collection to inspect.
  9796. * @param {Function} [predicate=_.identity] The function invoked per iteration.
  9797. * @param {number} [fromIndex=collection.length-1] The index to search from.
  9798. * @returns {*} Returns the matched element, else `undefined`.
  9799. * @example
  9800. *
  9801. * _.findLast([1, 2, 3, 4], function(n) {
  9802. * return n % 2 == 1;
  9803. * });
  9804. * // => 3
  9805. */
  9806. var findLast = createFind(findLastIndex);
  9807. /**
  9808. * Creates a flattened array of values by running each element in `collection`
  9809. * thru `iteratee` and flattening the mapped results. The iteratee is invoked
  9810. * with three arguments: (value, index|key, collection).
  9811. *
  9812. * @static
  9813. * @memberOf _
  9814. * @since 4.0.0
  9815. * @category Collection
  9816. * @param {Array|Object} collection The collection to iterate over.
  9817. * @param {Function} [iteratee=_.identity] The function invoked per iteration.
  9818. * @returns {Array} Returns the new flattened array.
  9819. * @example
  9820. *
  9821. * function duplicate(n) {
  9822. * return [n, n];
  9823. * }
  9824. *
  9825. * _.flatMap([1, 2], duplicate);
  9826. * // => [1, 1, 2, 2]
  9827. */
  9828. function flatMap(collection, iteratee) {
  9829. return baseFlatten(map(collection, iteratee), 1);
  9830. }
  9831. /**
  9832. * This method is like `_.flatMap` except that it recursively flattens the
  9833. * mapped results.
  9834. *
  9835. * @static
  9836. * @memberOf _
  9837. * @since 4.7.0
  9838. * @category Collection
  9839. * @param {Array|Object} collection The collection to iterate over.
  9840. * @param {Function} [iteratee=_.identity] The function invoked per iteration.
  9841. * @returns {Array} Returns the new flattened array.
  9842. * @example
  9843. *
  9844. * function duplicate(n) {
  9845. * return [[[n, n]]];
  9846. * }
  9847. *
  9848. * _.flatMapDeep([1, 2], duplicate);
  9849. * // => [1, 1, 2, 2]
  9850. */
  9851. function flatMapDeep(collection, iteratee) {
  9852. return baseFlatten(map(collection, iteratee), INFINITY);
  9853. }
  9854. /**
  9855. * This method is like `_.flatMap` except that it recursively flattens the
  9856. * mapped results up to `depth` times.
  9857. *
  9858. * @static
  9859. * @memberOf _
  9860. * @since 4.7.0
  9861. * @category Collection
  9862. * @param {Array|Object} collection The collection to iterate over.
  9863. * @param {Function} [iteratee=_.identity] The function invoked per iteration.
  9864. * @param {number} [depth=1] The maximum recursion depth.
  9865. * @returns {Array} Returns the new flattened array.
  9866. * @example
  9867. *
  9868. * function duplicate(n) {
  9869. * return [[[n, n]]];
  9870. * }
  9871. *
  9872. * _.flatMapDepth([1, 2], duplicate, 2);
  9873. * // => [[1, 1], [2, 2]]
  9874. */
  9875. function flatMapDepth(collection, iteratee, depth) {
  9876. depth = depth === undefined ? 1 : toInteger(depth);
  9877. return baseFlatten(map(collection, iteratee), depth);
  9878. }
  9879. /**
  9880. * Iterates over elements of `collection` and invokes `iteratee` for each element.
  9881. * The iteratee is invoked with three arguments: (value, index|key, collection).
  9882. * Iteratee functions may exit iteration early by explicitly returning `false`.
  9883. *
  9884. * **Note:** As with other "Collections" methods, objects with a "length"
  9885. * property are iterated like arrays. To avoid this behavior use `_.forIn`
  9886. * or `_.forOwn` for object iteration.
  9887. *
  9888. * @static
  9889. * @memberOf _
  9890. * @since 0.1.0
  9891. * @alias each
  9892. * @category Collection
  9893. * @param {Array|Object} collection The collection to iterate over.
  9894. * @param {Function} [iteratee=_.identity] The function invoked per iteration.
  9895. * @returns {Array|Object} Returns `collection`.
  9896. * @see _.forEachRight
  9897. * @example
  9898. *
  9899. * _.forEach([1, 2], function(value) {
  9900. * console.log(value);
  9901. * });
  9902. * // => Logs `1` then `2`.
  9903. *
  9904. * _.forEach({ 'a': 1, 'b': 2 }, function(value, key) {
  9905. * console.log(key);
  9906. * });
  9907. * // => Logs 'a' then 'b' (iteration order is not guaranteed).
  9908. */
  9909. function forEach(collection, iteratee) {
  9910. var func = isArray(collection) ? arrayEach : baseEach;
  9911. return func(collection, getIteratee(iteratee, 3));
  9912. }
  9913. /**
  9914. * This method is like `_.forEach` except that it iterates over elements of
  9915. * `collection` from right to left.
  9916. *
  9917. * @static
  9918. * @memberOf _
  9919. * @since 2.0.0
  9920. * @alias eachRight
  9921. * @category Collection
  9922. * @param {Array|Object} collection The collection to iterate over.
  9923. * @param {Function} [iteratee=_.identity] The function invoked per iteration.
  9924. * @returns {Array|Object} Returns `collection`.
  9925. * @see _.forEach
  9926. * @example
  9927. *
  9928. * _.forEachRight([1, 2], function(value) {
  9929. * console.log(value);
  9930. * });
  9931. * // => Logs `2` then `1`.
  9932. */
  9933. function forEachRight(collection, iteratee) {
  9934. var func = isArray(collection) ? arrayEachRight : baseEachRight;
  9935. return func(collection, getIteratee(iteratee, 3));
  9936. }
  9937. /**
  9938. * Creates an object composed of keys generated from the results of running
  9939. * each element of `collection` thru `iteratee`. The order of grouped values
  9940. * is determined by the order they occur in `collection`. The corresponding
  9941. * value of each key is an array of elements responsible for generating the
  9942. * key. The iteratee is invoked with one argument: (value).
  9943. *
  9944. * @static
  9945. * @memberOf _
  9946. * @since 0.1.0
  9947. * @category Collection
  9948. * @param {Array|Object} collection The collection to iterate over.
  9949. * @param {Function} [iteratee=_.identity] The iteratee to transform keys.
  9950. * @returns {Object} Returns the composed aggregate object.
  9951. * @example
  9952. *
  9953. * _.groupBy([6.1, 4.2, 6.3], Math.floor);
  9954. * // => { '4': [4.2], '6': [6.1, 6.3] }
  9955. *
  9956. * // The `_.property` iteratee shorthand.
  9957. * _.groupBy(['one', 'two', 'three'], 'length');
  9958. * // => { '3': ['one', 'two'], '5': ['three'] }
  9959. */
  9960. var groupBy = createAggregator(function(result, value, key) {
  9961. if (hasOwnProperty.call(result, key)) {
  9962. result[key].push(value);
  9963. } else {
  9964. baseAssignValue(result, key, [value]);
  9965. }
  9966. });
  9967. /**
  9968. * Checks if `value` is in `collection`. If `collection` is a string, it's
  9969. * checked for a substring of `value`, otherwise
  9970. * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
  9971. * is used for equality comparisons. If `fromIndex` is negative, it's used as
  9972. * the offset from the end of `collection`.
  9973. *
  9974. * @static
  9975. * @memberOf _
  9976. * @since 0.1.0
  9977. * @category Collection
  9978. * @param {Array|Object|string} collection The collection to inspect.
  9979. * @param {*} value The value to search for.
  9980. * @param {number} [fromIndex=0] The index to search from.
  9981. * @param- {Object} [guard] Enables use as an iteratee for methods like `_.reduce`.
  9982. * @returns {boolean} Returns `true` if `value` is found, else `false`.
  9983. * @example
  9984. *
  9985. * _.includes([1, 2, 3], 1);
  9986. * // => true
  9987. *
  9988. * _.includes([1, 2, 3], 1, 2);
  9989. * // => false
  9990. *
  9991. * _.includes({ 'a': 1, 'b': 2 }, 1);
  9992. * // => true
  9993. *
  9994. * _.includes('abcd', 'bc');
  9995. * // => true
  9996. */
  9997. function includes(collection, value, fromIndex, guard) {
  9998. collection = isArrayLike(collection) ? collection : values(collection);
  9999. fromIndex = (fromIndex && !guard) ? toInteger(fromIndex) : 0;
  10000. var length = collection.length;
  10001. if (fromIndex < 0) {
  10002. fromIndex = nativeMax(length + fromIndex, 0);
  10003. }
  10004. return isString(collection)
  10005. ? (fromIndex <= length && collection.indexOf(value, fromIndex) > -1)
  10006. : (!!length && baseIndexOf(collection, value, fromIndex) > -1);
  10007. }
  10008. /**
  10009. * Invokes the method at `path` of each element in `collection`, returning
  10010. * an array of the results of each invoked method. Any additional arguments
  10011. * are provided to each invoked method. If `path` is a function, it's invoked
  10012. * for, and `this` bound to, each element in `collection`.
  10013. *
  10014. * @static
  10015. * @memberOf _
  10016. * @since 4.0.0
  10017. * @category Collection
  10018. * @param {Array|Object} collection The collection to iterate over.
  10019. * @param {Array|Function|string} path The path of the method to invoke or
  10020. * the function invoked per iteration.
  10021. * @param {...*} [args] The arguments to invoke each method with.
  10022. * @returns {Array} Returns the array of results.
  10023. * @example
  10024. *
  10025. * _.invokeMap([[5, 1, 7], [3, 2, 1]], 'sort');
  10026. * // => [[1, 5, 7], [1, 2, 3]]
  10027. *
  10028. * _.invokeMap([123, 456], String.prototype.split, '');
  10029. * // => [['1', '2', '3'], ['4', '5', '6']]
  10030. */
  10031. var invokeMap = baseRest(function(collection, path, args) {
  10032. var index = -1,
  10033. isFunc = typeof path == 'function',
  10034. result = isArrayLike(collection) ? Array(collection.length) : [];
  10035. baseEach(collection, function(value) {
  10036. result[++index] = isFunc ? apply(path, value, args) : baseInvoke(value, path, args);
  10037. });
  10038. return result;
  10039. });
  10040. /**
  10041. * Creates an object composed of keys generated from the results of running
  10042. * each element of `collection` thru `iteratee`. The corresponding value of
  10043. * each key is the last element responsible for generating the key. The
  10044. * iteratee is invoked with one argument: (value).
  10045. *
  10046. * @static
  10047. * @memberOf _
  10048. * @since 4.0.0
  10049. * @category Collection
  10050. * @param {Array|Object} collection The collection to iterate over.
  10051. * @param {Function} [iteratee=_.identity] The iteratee to transform keys.
  10052. * @returns {Object} Returns the composed aggregate object.
  10053. * @example
  10054. *
  10055. * var array = [
  10056. * { 'dir': 'left', 'code': 97 },
  10057. * { 'dir': 'right', 'code': 100 }
  10058. * ];
  10059. *
  10060. * _.keyBy(array, function(o) {
  10061. * return String.fromCharCode(o.code);
  10062. * });
  10063. * // => { 'a': { 'dir': 'left', 'code': 97 }, 'd': { 'dir': 'right', 'code': 100 } }
  10064. *
  10065. * _.keyBy(array, 'dir');
  10066. * // => { 'left': { 'dir': 'left', 'code': 97 }, 'right': { 'dir': 'right', 'code': 100 } }
  10067. */
  10068. var keyBy = createAggregator(function(result, value, key) {
  10069. baseAssignValue(result, key, value);
  10070. });
  10071. /**
  10072. * Creates an array of values by running each element in `collection` thru
  10073. * `iteratee`. The iteratee is invoked with three arguments:
  10074. * (value, index|key, collection).
  10075. *
  10076. * Many lodash methods are guarded to work as iteratees for methods like
  10077. * `_.every`, `_.filter`, `_.map`, `_.mapValues`, `_.reject`, and `_.some`.
  10078. *
  10079. * The guarded methods are:
  10080. * `ary`, `chunk`, `curry`, `curryRight`, `drop`, `dropRight`, `every`,
  10081. * `fill`, `invert`, `parseInt`, `random`, `range`, `rangeRight`, `repeat`,
  10082. * `sampleSize`, `slice`, `some`, `sortBy`, `split`, `take`, `takeRight`,
  10083. * `template`, `trim`, `trimEnd`, `trimStart`, and `words`
  10084. *
  10085. * @static
  10086. * @memberOf _
  10087. * @since 0.1.0
  10088. * @category Collection
  10089. * @param {Array|Object} collection The collection to iterate over.
  10090. * @param {Function} [iteratee=_.identity] The function invoked per iteration.
  10091. * @returns {Array} Returns the new mapped array.
  10092. * @example
  10093. *
  10094. * function square(n) {
  10095. * return n * n;
  10096. * }
  10097. *
  10098. * _.map([4, 8], square);
  10099. * // => [16, 64]
  10100. *
  10101. * _.map({ 'a': 4, 'b': 8 }, square);
  10102. * // => [16, 64] (iteration order is not guaranteed)
  10103. *
  10104. * var users = [
  10105. * { 'user': 'barney' },
  10106. * { 'user': 'fred' }
  10107. * ];
  10108. *
  10109. * // The `_.property` iteratee shorthand.
  10110. * _.map(users, 'user');
  10111. * // => ['barney', 'fred']
  10112. */
  10113. function map(collection, iteratee) {
  10114. var func = isArray(collection) ? arrayMap : baseMap;
  10115. return func(collection, getIteratee(iteratee, 3));
  10116. }
  10117. /**
  10118. * This method is like `_.sortBy` except that it allows specifying the sort
  10119. * orders of the iteratees to sort by. If `orders` is unspecified, all values
  10120. * are sorted in ascending order. Otherwise, specify an order of "desc" for
  10121. * descending or "asc" for ascending sort order of corresponding values.
  10122. *
  10123. * @static
  10124. * @memberOf _
  10125. * @since 4.0.0
  10126. * @category Collection
  10127. * @param {Array|Object} collection The collection to iterate over.
  10128. * @param {Array[]|Function[]|Object[]|string[]} [iteratees=[_.identity]]
  10129. * The iteratees to sort by.
  10130. * @param {string[]} [orders] The sort orders of `iteratees`.
  10131. * @param- {Object} [guard] Enables use as an iteratee for methods like `_.reduce`.
  10132. * @returns {Array} Returns the new sorted array.
  10133. * @example
  10134. *
  10135. * var users = [
  10136. * { 'user': 'fred', 'age': 48 },
  10137. * { 'user': 'barney', 'age': 34 },
  10138. * { 'user': 'fred', 'age': 40 },
  10139. * { 'user': 'barney', 'age': 36 }
  10140. * ];
  10141. *
  10142. * // Sort by `user` in ascending order and by `age` in descending order.
  10143. * _.orderBy(users, ['user', 'age'], ['asc', 'desc']);
  10144. * // => objects for [['barney', 36], ['barney', 34], ['fred', 48], ['fred', 40]]
  10145. */
  10146. function orderBy(collection, iteratees, orders, guard) {
  10147. if (collection == null) {
  10148. return [];
  10149. }
  10150. if (!isArray(iteratees)) {
  10151. iteratees = iteratees == null ? [] : [iteratees];
  10152. }
  10153. orders = guard ? undefined : orders;
  10154. if (!isArray(orders)) {
  10155. orders = orders == null ? [] : [orders];
  10156. }
  10157. return baseOrderBy(collection, iteratees, orders);
  10158. }
  10159. /**
  10160. * Creates an array of elements split into two groups, the first of which
  10161. * contains elements `predicate` returns truthy for, the second of which
  10162. * contains elements `predicate` returns falsey for. The predicate is
  10163. * invoked with one argument: (value).
  10164. *
  10165. * @static
  10166. * @memberOf _
  10167. * @since 3.0.0
  10168. * @category Collection
  10169. * @param {Array|Object} collection The collection to iterate over.
  10170. * @param {Function} [predicate=_.identity] The function invoked per iteration.
  10171. * @returns {Array} Returns the array of grouped elements.
  10172. * @example
  10173. *
  10174. * var users = [
  10175. * { 'user': 'barney', 'age': 36, 'active': false },
  10176. * { 'user': 'fred', 'age': 40, 'active': true },
  10177. * { 'user': 'pebbles', 'age': 1, 'active': false }
  10178. * ];
  10179. *
  10180. * _.partition(users, function(o) { return o.active; });
  10181. * // => objects for [['fred'], ['barney', 'pebbles']]
  10182. *
  10183. * // The `_.matches` iteratee shorthand.
  10184. * _.partition(users, { 'age': 1, 'active': false });
  10185. * // => objects for [['pebbles'], ['barney', 'fred']]
  10186. *
  10187. * // The `_.matchesProperty` iteratee shorthand.
  10188. * _.partition(users, ['active', false]);
  10189. * // => objects for [['barney', 'pebbles'], ['fred']]
  10190. *
  10191. * // The `_.property` iteratee shorthand.
  10192. * _.partition(users, 'active');
  10193. * // => objects for [['fred'], ['barney', 'pebbles']]
  10194. */
  10195. var partition = createAggregator(function(result, value, key) {
  10196. result[key ? 0 : 1].push(value);
  10197. }, function() { return [[], []]; });
  10198. /**
  10199. * Reduces `collection` to a value which is the accumulated result of running
  10200. * each element in `collection` thru `iteratee`, where each successive
  10201. * invocation is supplied the return value of the previous. If `accumulator`
  10202. * is not given, the first element of `collection` is used as the initial
  10203. * value. The iteratee is invoked with four arguments:
  10204. * (accumulator, value, index|key, collection).
  10205. *
  10206. * Many lodash methods are guarded to work as iteratees for methods like
  10207. * `_.reduce`, `_.reduceRight`, and `_.transform`.
  10208. *
  10209. * The guarded methods are:
  10210. * `assign`, `defaults`, `defaultsDeep`, `includes`, `merge`, `orderBy`,
  10211. * and `sortBy`
  10212. *
  10213. * @static
  10214. * @memberOf _
  10215. * @since 0.1.0
  10216. * @category Collection
  10217. * @param {Array|Object} collection The collection to iterate over.
  10218. * @param {Function} [iteratee=_.identity] The function invoked per iteration.
  10219. * @param {*} [accumulator] The initial value.
  10220. * @returns {*} Returns the accumulated value.
  10221. * @see _.reduceRight
  10222. * @example
  10223. *
  10224. * _.reduce([1, 2], function(sum, n) {
  10225. * return sum + n;
  10226. * }, 0);
  10227. * // => 3
  10228. *
  10229. * _.reduce({ 'a': 1, 'b': 2, 'c': 1 }, function(result, value, key) {
  10230. * (result[value] || (result[value] = [])).push(key);
  10231. * return result;
  10232. * }, {});
  10233. * // => { '1': ['a', 'c'], '2': ['b'] } (iteration order is not guaranteed)
  10234. */
  10235. function reduce(collection, iteratee, accumulator) {
  10236. var func = isArray(collection) ? arrayReduce : baseReduce,
  10237. initAccum = arguments.length < 3;
  10238. return func(collection, getIteratee(iteratee, 4), accumulator, initAccum, baseEach);
  10239. }
  10240. /**
  10241. * This method is like `_.reduce` except that it iterates over elements of
  10242. * `collection` from right to left.
  10243. *
  10244. * @static
  10245. * @memberOf _
  10246. * @since 0.1.0
  10247. * @category Collection
  10248. * @param {Array|Object} collection The collection to iterate over.
  10249. * @param {Function} [iteratee=_.identity] The function invoked per iteration.
  10250. * @param {*} [accumulator] The initial value.
  10251. * @returns {*} Returns the accumulated value.
  10252. * @see _.reduce
  10253. * @example
  10254. *
  10255. * var array = [[0, 1], [2, 3], [4, 5]];
  10256. *
  10257. * _.reduceRight(array, function(flattened, other) {
  10258. * return flattened.concat(other);
  10259. * }, []);
  10260. * // => [4, 5, 2, 3, 0, 1]
  10261. */
  10262. function reduceRight(collection, iteratee, accumulator) {
  10263. var func = isArray(collection) ? arrayReduceRight : baseReduce,
  10264. initAccum = arguments.length < 3;
  10265. return func(collection, getIteratee(iteratee, 4), accumulator, initAccum, baseEachRight);
  10266. }
  10267. /**
  10268. * The opposite of `_.filter`; this method returns the elements of `collection`
  10269. * that `predicate` does **not** return truthy for.
  10270. *
  10271. * @static
  10272. * @memberOf _
  10273. * @since 0.1.0
  10274. * @category Collection
  10275. * @param {Array|Object} collection The collection to iterate over.
  10276. * @param {Function} [predicate=_.identity] The function invoked per iteration.
  10277. * @returns {Array} Returns the new filtered array.
  10278. * @see _.filter
  10279. * @example
  10280. *
  10281. * var users = [
  10282. * { 'user': 'barney', 'age': 36, 'active': false },
  10283. * { 'user': 'fred', 'age': 40, 'active': true }
  10284. * ];
  10285. *
  10286. * _.reject(users, function(o) { return !o.active; });
  10287. * // => objects for ['fred']
  10288. *
  10289. * // The `_.matches` iteratee shorthand.
  10290. * _.reject(users, { 'age': 40, 'active': true });
  10291. * // => objects for ['barney']
  10292. *
  10293. * // The `_.matchesProperty` iteratee shorthand.
  10294. * _.reject(users, ['active', false]);
  10295. * // => objects for ['fred']
  10296. *
  10297. * // The `_.property` iteratee shorthand.
  10298. * _.reject(users, 'active');
  10299. * // => objects for ['barney']
  10300. */
  10301. function reject(collection, predicate) {
  10302. var func = isArray(collection) ? arrayFilter : baseFilter;
  10303. return func(collection, negate(getIteratee(predicate, 3)));
  10304. }
  10305. /**
  10306. * Gets a random element from `collection`.
  10307. *
  10308. * @static
  10309. * @memberOf _
  10310. * @since 2.0.0
  10311. * @category Collection
  10312. * @param {Array|Object} collection The collection to sample.
  10313. * @returns {*} Returns the random element.
  10314. * @example
  10315. *
  10316. * _.sample([1, 2, 3, 4]);
  10317. * // => 2
  10318. */
  10319. function sample(collection) {
  10320. var func = isArray(collection) ? arraySample : baseSample;
  10321. return func(collection);
  10322. }
  10323. /**
  10324. * Gets `n` random elements at unique keys from `collection` up to the
  10325. * size of `collection`.
  10326. *
  10327. * @static
  10328. * @memberOf _
  10329. * @since 4.0.0
  10330. * @category Collection
  10331. * @param {Array|Object} collection The collection to sample.
  10332. * @param {number} [n=1] The number of elements to sample.
  10333. * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
  10334. * @returns {Array} Returns the random elements.
  10335. * @example
  10336. *
  10337. * _.sampleSize([1, 2, 3], 2);
  10338. * // => [3, 1]
  10339. *
  10340. * _.sampleSize([1, 2, 3], 4);
  10341. * // => [2, 3, 1]
  10342. */
  10343. function sampleSize(collection, n, guard) {
  10344. if ((guard ? isIterateeCall(collection, n, guard) : n === undefined)) {
  10345. n = 1;
  10346. } else {
  10347. n = toInteger(n);
  10348. }
  10349. var func = isArray(collection) ? arraySampleSize : baseSampleSize;
  10350. return func(collection, n);
  10351. }
  10352. /**
  10353. * Creates an array of shuffled values, using a version of the
  10354. * [Fisher-Yates shuffle](https://en.wikipedia.org/wiki/Fisher-Yates_shuffle).
  10355. *
  10356. * @static
  10357. * @memberOf _
  10358. * @since 0.1.0
  10359. * @category Collection
  10360. * @param {Array|Object} collection The collection to shuffle.
  10361. * @returns {Array} Returns the new shuffled array.
  10362. * @example
  10363. *
  10364. * _.shuffle([1, 2, 3, 4]);
  10365. * // => [4, 1, 3, 2]
  10366. */
  10367. function shuffle(collection) {
  10368. var func = isArray(collection) ? arrayShuffle : baseShuffle;
  10369. return func(collection);
  10370. }
  10371. /**
  10372. * Gets the size of `collection` by returning its length for array-like
  10373. * values or the number of own enumerable string keyed properties for objects.
  10374. *
  10375. * @static
  10376. * @memberOf _
  10377. * @since 0.1.0
  10378. * @category Collection
  10379. * @param {Array|Object|string} collection The collection to inspect.
  10380. * @returns {number} Returns the collection size.
  10381. * @example
  10382. *
  10383. * _.size([1, 2, 3]);
  10384. * // => 3
  10385. *
  10386. * _.size({ 'a': 1, 'b': 2 });
  10387. * // => 2
  10388. *
  10389. * _.size('pebbles');
  10390. * // => 7
  10391. */
  10392. function size(collection) {
  10393. if (collection == null) {
  10394. return 0;
  10395. }
  10396. if (isArrayLike(collection)) {
  10397. return isString(collection) ? stringSize(collection) : collection.length;
  10398. }
  10399. var tag = getTag(collection);
  10400. if (tag == mapTag || tag == setTag) {
  10401. return collection.size;
  10402. }
  10403. return baseKeys(collection).length;
  10404. }
  10405. /**
  10406. * Checks if `predicate` returns truthy for **any** element of `collection`.
  10407. * Iteration is stopped once `predicate` returns truthy. The predicate is
  10408. * invoked with three arguments: (value, index|key, collection).
  10409. *
  10410. * @static
  10411. * @memberOf _
  10412. * @since 0.1.0
  10413. * @category Collection
  10414. * @param {Array|Object} collection The collection to iterate over.
  10415. * @param {Function} [predicate=_.identity] The function invoked per iteration.
  10416. * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
  10417. * @returns {boolean} Returns `true` if any element passes the predicate check,
  10418. * else `false`.
  10419. * @example
  10420. *
  10421. * _.some([null, 0, 'yes', false], Boolean);
  10422. * // => true
  10423. *
  10424. * var users = [
  10425. * { 'user': 'barney', 'active': true },
  10426. * { 'user': 'fred', 'active': false }
  10427. * ];
  10428. *
  10429. * // The `_.matches` iteratee shorthand.
  10430. * _.some(users, { 'user': 'barney', 'active': false });
  10431. * // => false
  10432. *
  10433. * // The `_.matchesProperty` iteratee shorthand.
  10434. * _.some(users, ['active', false]);
  10435. * // => true
  10436. *
  10437. * // The `_.property` iteratee shorthand.
  10438. * _.some(users, 'active');
  10439. * // => true
  10440. */
  10441. function some(collection, predicate, guard) {
  10442. var func = isArray(collection) ? arraySome : baseSome;
  10443. if (guard && isIterateeCall(collection, predicate, guard)) {
  10444. predicate = undefined;
  10445. }
  10446. return func(collection, getIteratee(predicate, 3));
  10447. }
  10448. /**
  10449. * Creates an array of elements, sorted in ascending order by the results of
  10450. * running each element in a collection thru each iteratee. This method
  10451. * performs a stable sort, that is, it preserves the original sort order of
  10452. * equal elements. The iteratees are invoked with one argument: (value).
  10453. *
  10454. * @static
  10455. * @memberOf _
  10456. * @since 0.1.0
  10457. * @category Collection
  10458. * @param {Array|Object} collection The collection to iterate over.
  10459. * @param {...(Function|Function[])} [iteratees=[_.identity]]
  10460. * The iteratees to sort by.
  10461. * @returns {Array} Returns the new sorted array.
  10462. * @example
  10463. *
  10464. * var users = [
  10465. * { 'user': 'fred', 'age': 48 },
  10466. * { 'user': 'barney', 'age': 36 },
  10467. * { 'user': 'fred', 'age': 40 },
  10468. * { 'user': 'barney', 'age': 34 }
  10469. * ];
  10470. *
  10471. * _.sortBy(users, [function(o) { return o.user; }]);
  10472. * // => objects for [['barney', 36], ['barney', 34], ['fred', 48], ['fred', 40]]
  10473. *
  10474. * _.sortBy(users, ['user', 'age']);
  10475. * // => objects for [['barney', 34], ['barney', 36], ['fred', 40], ['fred', 48]]
  10476. */
  10477. var sortBy = baseRest(function(collection, iteratees) {
  10478. if (collection == null) {
  10479. return [];
  10480. }
  10481. var length = iteratees.length;
  10482. if (length > 1 && isIterateeCall(collection, iteratees[0], iteratees[1])) {
  10483. iteratees = [];
  10484. } else if (length > 2 && isIterateeCall(iteratees[0], iteratees[1], iteratees[2])) {
  10485. iteratees = [iteratees[0]];
  10486. }
  10487. return baseOrderBy(collection, baseFlatten(iteratees, 1), []);
  10488. });
  10489. /*------------------------------------------------------------------------*/
  10490. /**
  10491. * Gets the timestamp of the number of milliseconds that have elapsed since
  10492. * the Unix epoch (1 January 1970 00:00:00 UTC).
  10493. *
  10494. * @static
  10495. * @memberOf _
  10496. * @since 2.4.0
  10497. * @category Date
  10498. * @returns {number} Returns the timestamp.
  10499. * @example
  10500. *
  10501. * _.defer(function(stamp) {
  10502. * console.log(_.now() - stamp);
  10503. * }, _.now());
  10504. * // => Logs the number of milliseconds it took for the deferred invocation.
  10505. */
  10506. var now = ctxNow || function() {
  10507. return root.Date.now();
  10508. };
  10509. /*------------------------------------------------------------------------*/
  10510. /**
  10511. * The opposite of `_.before`; this method creates a function that invokes
  10512. * `func` once it's called `n` or more times.
  10513. *
  10514. * @static
  10515. * @memberOf _
  10516. * @since 0.1.0
  10517. * @category Function
  10518. * @param {number} n The number of calls before `func` is invoked.
  10519. * @param {Function} func The function to restrict.
  10520. * @returns {Function} Returns the new restricted function.
  10521. * @example
  10522. *
  10523. * var saves = ['profile', 'settings'];
  10524. *
  10525. * var done = _.after(saves.length, function() {
  10526. * console.log('done saving!');
  10527. * });
  10528. *
  10529. * _.forEach(saves, function(type) {
  10530. * asyncSave({ 'type': type, 'complete': done });
  10531. * });
  10532. * // => Logs 'done saving!' after the two async saves have completed.
  10533. */
  10534. function after(n, func) {
  10535. if (typeof func != 'function') {
  10536. throw new TypeError(FUNC_ERROR_TEXT);
  10537. }
  10538. n = toInteger(n);
  10539. return function() {
  10540. if (--n < 1) {
  10541. return func.apply(this, arguments);
  10542. }
  10543. };
  10544. }
  10545. /**
  10546. * Creates a function that invokes `func`, with up to `n` arguments,
  10547. * ignoring any additional arguments.
  10548. *
  10549. * @static
  10550. * @memberOf _
  10551. * @since 3.0.0
  10552. * @category Function
  10553. * @param {Function} func The function to cap arguments for.
  10554. * @param {number} [n=func.length] The arity cap.
  10555. * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
  10556. * @returns {Function} Returns the new capped function.
  10557. * @example
  10558. *
  10559. * _.map(['6', '8', '10'], _.ary(parseInt, 1));
  10560. * // => [6, 8, 10]
  10561. */
  10562. function ary(func, n, guard) {
  10563. n = guard ? undefined : n;
  10564. n = (func && n == null) ? func.length : n;
  10565. return createWrap(func, WRAP_ARY_FLAG, undefined, undefined, undefined, undefined, n);
  10566. }
  10567. /**
  10568. * Creates a function that invokes `func`, with the `this` binding and arguments
  10569. * of the created function, while it's called less than `n` times. Subsequent
  10570. * calls to the created function return the result of the last `func` invocation.
  10571. *
  10572. * @static
  10573. * @memberOf _
  10574. * @since 3.0.0
  10575. * @category Function
  10576. * @param {number} n The number of calls at which `func` is no longer invoked.
  10577. * @param {Function} func The function to restrict.
  10578. * @returns {Function} Returns the new restricted function.
  10579. * @example
  10580. *
  10581. * jQuery(element).on('click', _.before(5, addContactToList));
  10582. * // => Allows adding up to 4 contacts to the list.
  10583. */
  10584. function before(n, func) {
  10585. var result;
  10586. if (typeof func != 'function') {
  10587. throw new TypeError(FUNC_ERROR_TEXT);
  10588. }
  10589. n = toInteger(n);
  10590. return function() {
  10591. if (--n > 0) {
  10592. result = func.apply(this, arguments);
  10593. }
  10594. if (n <= 1) {
  10595. func = undefined;
  10596. }
  10597. return result;
  10598. };
  10599. }
  10600. /**
  10601. * Creates a function that invokes `func` with the `this` binding of `thisArg`
  10602. * and `partials` prepended to the arguments it receives.
  10603. *
  10604. * The `_.bind.placeholder` value, which defaults to `_` in monolithic builds,
  10605. * may be used as a placeholder for partially applied arguments.
  10606. *
  10607. * **Note:** Unlike native `Function#bind`, this method doesn't set the "length"
  10608. * property of bound functions.
  10609. *
  10610. * @static
  10611. * @memberOf _
  10612. * @since 0.1.0
  10613. * @category Function
  10614. * @param {Function} func The function to bind.
  10615. * @param {*} thisArg The `this` binding of `func`.
  10616. * @param {...*} [partials] The arguments to be partially applied.
  10617. * @returns {Function} Returns the new bound function.
  10618. * @example
  10619. *
  10620. * function greet(greeting, punctuation) {
  10621. * return greeting + ' ' + this.user + punctuation;
  10622. * }
  10623. *
  10624. * var object = { 'user': 'fred' };
  10625. *
  10626. * var bound = _.bind(greet, object, 'hi');
  10627. * bound('!');
  10628. * // => 'hi fred!'
  10629. *
  10630. * // Bound with placeholders.
  10631. * var bound = _.bind(greet, object, _, '!');
  10632. * bound('hi');
  10633. * // => 'hi fred!'
  10634. */
  10635. var bind = baseRest(function(func, thisArg, partials) {
  10636. var bitmask = WRAP_BIND_FLAG;
  10637. if (partials.length) {
  10638. var holders = replaceHolders(partials, getHolder(bind));
  10639. bitmask |= WRAP_PARTIAL_FLAG;
  10640. }
  10641. return createWrap(func, bitmask, thisArg, partials, holders);
  10642. });
  10643. /**
  10644. * Creates a function that invokes the method at `object[key]` with `partials`
  10645. * prepended to the arguments it receives.
  10646. *
  10647. * This method differs from `_.bind` by allowing bound functions to reference
  10648. * methods that may be redefined or don't yet exist. See
  10649. * [Peter Michaux's article](http://peter.michaux.ca/articles/lazy-function-definition-pattern)
  10650. * for more details.
  10651. *
  10652. * The `_.bindKey.placeholder` value, which defaults to `_` in monolithic
  10653. * builds, may be used as a placeholder for partially applied arguments.
  10654. *
  10655. * @static
  10656. * @memberOf _
  10657. * @since 0.10.0
  10658. * @category Function
  10659. * @param {Object} object The object to invoke the method on.
  10660. * @param {string} key The key of the method.
  10661. * @param {...*} [partials] The arguments to be partially applied.
  10662. * @returns {Function} Returns the new bound function.
  10663. * @example
  10664. *
  10665. * var object = {
  10666. * 'user': 'fred',
  10667. * 'greet': function(greeting, punctuation) {
  10668. * return greeting + ' ' + this.user + punctuation;
  10669. * }
  10670. * };
  10671. *
  10672. * var bound = _.bindKey(object, 'greet', 'hi');
  10673. * bound('!');
  10674. * // => 'hi fred!'
  10675. *
  10676. * object.greet = function(greeting, punctuation) {
  10677. * return greeting + 'ya ' + this.user + punctuation;
  10678. * };
  10679. *
  10680. * bound('!');
  10681. * // => 'hiya fred!'
  10682. *
  10683. * // Bound with placeholders.
  10684. * var bound = _.bindKey(object, 'greet', _, '!');
  10685. * bound('hi');
  10686. * // => 'hiya fred!'
  10687. */
  10688. var bindKey = baseRest(function(object, key, partials) {
  10689. var bitmask = WRAP_BIND_FLAG | WRAP_BIND_KEY_FLAG;
  10690. if (partials.length) {
  10691. var holders = replaceHolders(partials, getHolder(bindKey));
  10692. bitmask |= WRAP_PARTIAL_FLAG;
  10693. }
  10694. return createWrap(key, bitmask, object, partials, holders);
  10695. });
  10696. /**
  10697. * Creates a function that accepts arguments of `func` and either invokes
  10698. * `func` returning its result, if at least `arity` number of arguments have
  10699. * been provided, or returns a function that accepts the remaining `func`
  10700. * arguments, and so on. The arity of `func` may be specified if `func.length`
  10701. * is not sufficient.
  10702. *
  10703. * The `_.curry.placeholder` value, which defaults to `_` in monolithic builds,
  10704. * may be used as a placeholder for provided arguments.
  10705. *
  10706. * **Note:** This method doesn't set the "length" property of curried functions.
  10707. *
  10708. * @static
  10709. * @memberOf _
  10710. * @since 2.0.0
  10711. * @category Function
  10712. * @param {Function} func The function to curry.
  10713. * @param {number} [arity=func.length] The arity of `func`.
  10714. * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
  10715. * @returns {Function} Returns the new curried function.
  10716. * @example
  10717. *
  10718. * var abc = function(a, b, c) {
  10719. * return [a, b, c];
  10720. * };
  10721. *
  10722. * var curried = _.curry(abc);
  10723. *
  10724. * curried(1)(2)(3);
  10725. * // => [1, 2, 3]
  10726. *
  10727. * curried(1, 2)(3);
  10728. * // => [1, 2, 3]
  10729. *
  10730. * curried(1, 2, 3);
  10731. * // => [1, 2, 3]
  10732. *
  10733. * // Curried with placeholders.
  10734. * curried(1)(_, 3)(2);
  10735. * // => [1, 2, 3]
  10736. */
  10737. function curry(func, arity, guard) {
  10738. arity = guard ? undefined : arity;
  10739. var result = createWrap(func, WRAP_CURRY_FLAG, undefined, undefined, undefined, undefined, undefined, arity);
  10740. result.placeholder = curry.placeholder;
  10741. return result;
  10742. }
  10743. /**
  10744. * This method is like `_.curry` except that arguments are applied to `func`
  10745. * in the manner of `_.partialRight` instead of `_.partial`.
  10746. *
  10747. * The `_.curryRight.placeholder` value, which defaults to `_` in monolithic
  10748. * builds, may be used as a placeholder for provided arguments.
  10749. *
  10750. * **Note:** This method doesn't set the "length" property of curried functions.
  10751. *
  10752. * @static
  10753. * @memberOf _
  10754. * @since 3.0.0
  10755. * @category Function
  10756. * @param {Function} func The function to curry.
  10757. * @param {number} [arity=func.length] The arity of `func`.
  10758. * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
  10759. * @returns {Function} Returns the new curried function.
  10760. * @example
  10761. *
  10762. * var abc = function(a, b, c) {
  10763. * return [a, b, c];
  10764. * };
  10765. *
  10766. * var curried = _.curryRight(abc);
  10767. *
  10768. * curried(3)(2)(1);
  10769. * // => [1, 2, 3]
  10770. *
  10771. * curried(2, 3)(1);
  10772. * // => [1, 2, 3]
  10773. *
  10774. * curried(1, 2, 3);
  10775. * // => [1, 2, 3]
  10776. *
  10777. * // Curried with placeholders.
  10778. * curried(3)(1, _)(2);
  10779. * // => [1, 2, 3]
  10780. */
  10781. function curryRight(func, arity, guard) {
  10782. arity = guard ? undefined : arity;
  10783. var result = createWrap(func, WRAP_CURRY_RIGHT_FLAG, undefined, undefined, undefined, undefined, undefined, arity);
  10784. result.placeholder = curryRight.placeholder;
  10785. return result;
  10786. }
  10787. /**
  10788. * Creates a debounced function that delays invoking `func` until after `wait`
  10789. * milliseconds have elapsed since the last time the debounced function was
  10790. * invoked. The debounced function comes with a `cancel` method to cancel
  10791. * delayed `func` invocations and a `flush` method to immediately invoke them.
  10792. * Provide `options` to indicate whether `func` should be invoked on the
  10793. * leading and/or trailing edge of the `wait` timeout. The `func` is invoked
  10794. * with the last arguments provided to the debounced function. Subsequent
  10795. * calls to the debounced function return the result of the last `func`
  10796. * invocation.
  10797. *
  10798. * **Note:** If `leading` and `trailing` options are `true`, `func` is
  10799. * invoked on the trailing edge of the timeout only if the debounced function
  10800. * is invoked more than once during the `wait` timeout.
  10801. *
  10802. * If `wait` is `0` and `leading` is `false`, `func` invocation is deferred
  10803. * until to the next tick, similar to `setTimeout` with a timeout of `0`.
  10804. *
  10805. * See [David Corbacho's article](https://css-tricks.com/debouncing-throttling-explained-examples/)
  10806. * for details over the differences between `_.debounce` and `_.throttle`.
  10807. *
  10808. * @static
  10809. * @memberOf _
  10810. * @since 0.1.0
  10811. * @category Function
  10812. * @param {Function} func The function to debounce.
  10813. * @param {number} [wait=0] The number of milliseconds to delay.
  10814. * @param {Object} [options={}] The options object.
  10815. * @param {boolean} [options.leading=false]
  10816. * Specify invoking on the leading edge of the timeout.
  10817. * @param {number} [options.maxWait]
  10818. * The maximum time `func` is allowed to be delayed before it's invoked.
  10819. * @param {boolean} [options.trailing=true]
  10820. * Specify invoking on the trailing edge of the timeout.
  10821. * @returns {Function} Returns the new debounced function.
  10822. * @example
  10823. *
  10824. * // Avoid costly calculations while the window size is in flux.
  10825. * jQuery(window).on('resize', _.debounce(calculateLayout, 150));
  10826. *
  10827. * // Invoke `sendMail` when clicked, debouncing subsequent calls.
  10828. * jQuery(element).on('click', _.debounce(sendMail, 300, {
  10829. * 'leading': true,
  10830. * 'trailing': false
  10831. * }));
  10832. *
  10833. * // Ensure `batchLog` is invoked once after 1 second of debounced calls.
  10834. * var debounced = _.debounce(batchLog, 250, { 'maxWait': 1000 });
  10835. * var source = new EventSource('/stream');
  10836. * jQuery(source).on('message', debounced);
  10837. *
  10838. * // Cancel the trailing debounced invocation.
  10839. * jQuery(window).on('popstate', debounced.cancel);
  10840. */
  10841. function debounce(func, wait, options) {
  10842. var lastArgs,
  10843. lastThis,
  10844. maxWait,
  10845. result,
  10846. timerId,
  10847. lastCallTime,
  10848. lastInvokeTime = 0,
  10849. leading = false,
  10850. maxing = false,
  10851. trailing = true;
  10852. if (typeof func != 'function') {
  10853. throw new TypeError(FUNC_ERROR_TEXT);
  10854. }
  10855. wait = toNumber(wait) || 0;
  10856. if (isObject(options)) {
  10857. leading = !!options.leading;
  10858. maxing = 'maxWait' in options;
  10859. maxWait = maxing ? nativeMax(toNumber(options.maxWait) || 0, wait) : maxWait;
  10860. trailing = 'trailing' in options ? !!options.trailing : trailing;
  10861. }
  10862. function invokeFunc(time) {
  10863. var args = lastArgs,
  10864. thisArg = lastThis;
  10865. lastArgs = lastThis = undefined;
  10866. lastInvokeTime = time;
  10867. result = func.apply(thisArg, args);
  10868. return result;
  10869. }
  10870. function leadingEdge(time) {
  10871. // Reset any `maxWait` timer.
  10872. lastInvokeTime = time;
  10873. // Start the timer for the trailing edge.
  10874. timerId = setTimeout(timerExpired, wait);
  10875. // Invoke the leading edge.
  10876. return leading ? invokeFunc(time) : result;
  10877. }
  10878. function remainingWait(time) {
  10879. var timeSinceLastCall = time - lastCallTime,
  10880. timeSinceLastInvoke = time - lastInvokeTime,
  10881. timeWaiting = wait - timeSinceLastCall;
  10882. return maxing
  10883. ? nativeMin(timeWaiting, maxWait - timeSinceLastInvoke)
  10884. : timeWaiting;
  10885. }
  10886. function shouldInvoke(time) {
  10887. var timeSinceLastCall = time - lastCallTime,
  10888. timeSinceLastInvoke = time - lastInvokeTime;
  10889. // Either this is the first call, activity has stopped and we're at the
  10890. // trailing edge, the system time has gone backwards and we're treating
  10891. // it as the trailing edge, or we've hit the `maxWait` limit.
  10892. return (lastCallTime === undefined || (timeSinceLastCall >= wait) ||
  10893. (timeSinceLastCall < 0) || (maxing && timeSinceLastInvoke >= maxWait));
  10894. }
  10895. function timerExpired() {
  10896. var time = now();
  10897. if (shouldInvoke(time)) {
  10898. return trailingEdge(time);
  10899. }
  10900. // Restart the timer.
  10901. timerId = setTimeout(timerExpired, remainingWait(time));
  10902. }
  10903. function trailingEdge(time) {
  10904. timerId = undefined;
  10905. // Only invoke if we have `lastArgs` which means `func` has been
  10906. // debounced at least once.
  10907. if (trailing && lastArgs) {
  10908. return invokeFunc(time);
  10909. }
  10910. lastArgs = lastThis = undefined;
  10911. return result;
  10912. }
  10913. function cancel() {
  10914. if (timerId !== undefined) {
  10915. clearTimeout(timerId);
  10916. }
  10917. lastInvokeTime = 0;
  10918. lastArgs = lastCallTime = lastThis = timerId = undefined;
  10919. }
  10920. function flush() {
  10921. return timerId === undefined ? result : trailingEdge(now());
  10922. }
  10923. function debounced() {
  10924. var time = now(),
  10925. isInvoking = shouldInvoke(time);
  10926. lastArgs = arguments;
  10927. lastThis = this;
  10928. lastCallTime = time;
  10929. if (isInvoking) {
  10930. if (timerId === undefined) {
  10931. return leadingEdge(lastCallTime);
  10932. }
  10933. if (maxing) {
  10934. // Handle invocations in a tight loop.
  10935. timerId = setTimeout(timerExpired, wait);
  10936. return invokeFunc(lastCallTime);
  10937. }
  10938. }
  10939. if (timerId === undefined) {
  10940. timerId = setTimeout(timerExpired, wait);
  10941. }
  10942. return result;
  10943. }
  10944. debounced.cancel = cancel;
  10945. debounced.flush = flush;
  10946. return debounced;
  10947. }
  10948. /**
  10949. * Defers invoking the `func` until the current call stack has cleared. Any
  10950. * additional arguments are provided to `func` when it's invoked.
  10951. *
  10952. * @static
  10953. * @memberOf _
  10954. * @since 0.1.0
  10955. * @category Function
  10956. * @param {Function} func The function to defer.
  10957. * @param {...*} [args] The arguments to invoke `func` with.
  10958. * @returns {number} Returns the timer id.
  10959. * @example
  10960. *
  10961. * _.defer(function(text) {
  10962. * console.log(text);
  10963. * }, 'deferred');
  10964. * // => Logs 'deferred' after one millisecond.
  10965. */
  10966. var defer = baseRest(function(func, args) {
  10967. return baseDelay(func, 1, args);
  10968. });
  10969. /**
  10970. * Invokes `func` after `wait` milliseconds. Any additional arguments are
  10971. * provided to `func` when it's invoked.
  10972. *
  10973. * @static
  10974. * @memberOf _
  10975. * @since 0.1.0
  10976. * @category Function
  10977. * @param {Function} func The function to delay.
  10978. * @param {number} wait The number of milliseconds to delay invocation.
  10979. * @param {...*} [args] The arguments to invoke `func` with.
  10980. * @returns {number} Returns the timer id.
  10981. * @example
  10982. *
  10983. * _.delay(function(text) {
  10984. * console.log(text);
  10985. * }, 1000, 'later');
  10986. * // => Logs 'later' after one second.
  10987. */
  10988. var delay = baseRest(function(func, wait, args) {
  10989. return baseDelay(func, toNumber(wait) || 0, args);
  10990. });
  10991. /**
  10992. * Creates a function that invokes `func` with arguments reversed.
  10993. *
  10994. * @static
  10995. * @memberOf _
  10996. * @since 4.0.0
  10997. * @category Function
  10998. * @param {Function} func The function to flip arguments for.
  10999. * @returns {Function} Returns the new flipped function.
  11000. * @example
  11001. *
  11002. * var flipped = _.flip(function() {
  11003. * return _.toArray(arguments);
  11004. * });
  11005. *
  11006. * flipped('a', 'b', 'c', 'd');
  11007. * // => ['d', 'c', 'b', 'a']
  11008. */
  11009. function flip(func) {
  11010. return createWrap(func, WRAP_FLIP_FLAG);
  11011. }
  11012. /**
  11013. * Creates a function that memoizes the result of `func`. If `resolver` is
  11014. * provided, it determines the cache key for storing the result based on the
  11015. * arguments provided to the memoized function. By default, the first argument
  11016. * provided to the memoized function is used as the map cache key. The `func`
  11017. * is invoked with the `this` binding of the memoized function.
  11018. *
  11019. * **Note:** The cache is exposed as the `cache` property on the memoized
  11020. * function. Its creation may be customized by replacing the `_.memoize.Cache`
  11021. * constructor with one whose instances implement the
  11022. * [`Map`](http://ecma-international.org/ecma-262/7.0/#sec-properties-of-the-map-prototype-object)
  11023. * method interface of `clear`, `delete`, `get`, `has`, and `set`.
  11024. *
  11025. * @static
  11026. * @memberOf _
  11027. * @since 0.1.0
  11028. * @category Function
  11029. * @param {Function} func The function to have its output memoized.
  11030. * @param {Function} [resolver] The function to resolve the cache key.
  11031. * @returns {Function} Returns the new memoized function.
  11032. * @example
  11033. *
  11034. * var object = { 'a': 1, 'b': 2 };
  11035. * var other = { 'c': 3, 'd': 4 };
  11036. *
  11037. * var values = _.memoize(_.values);
  11038. * values(object);
  11039. * // => [1, 2]
  11040. *
  11041. * values(other);
  11042. * // => [3, 4]
  11043. *
  11044. * object.a = 2;
  11045. * values(object);
  11046. * // => [1, 2]
  11047. *
  11048. * // Modify the result cache.
  11049. * values.cache.set(object, ['a', 'b']);
  11050. * values(object);
  11051. * // => ['a', 'b']
  11052. *
  11053. * // Replace `_.memoize.Cache`.
  11054. * _.memoize.Cache = WeakMap;
  11055. */
  11056. function memoize(func, resolver) {
  11057. if (typeof func != 'function' || (resolver != null && typeof resolver != 'function')) {
  11058. throw new TypeError(FUNC_ERROR_TEXT);
  11059. }
  11060. var memoized = function() {
  11061. var args = arguments,
  11062. key = resolver ? resolver.apply(this, args) : args[0],
  11063. cache = memoized.cache;
  11064. if (cache.has(key)) {
  11065. return cache.get(key);
  11066. }
  11067. var result = func.apply(this, args);
  11068. memoized.cache = cache.set(key, result) || cache;
  11069. return result;
  11070. };
  11071. memoized.cache = new (memoize.Cache || MapCache);
  11072. return memoized;
  11073. }
  11074. // Expose `MapCache`.
  11075. memoize.Cache = MapCache;
  11076. /**
  11077. * Creates a function that negates the result of the predicate `func`. The
  11078. * `func` predicate is invoked with the `this` binding and arguments of the
  11079. * created function.
  11080. *
  11081. * @static
  11082. * @memberOf _
  11083. * @since 3.0.0
  11084. * @category Function
  11085. * @param {Function} predicate The predicate to negate.
  11086. * @returns {Function} Returns the new negated function.
  11087. * @example
  11088. *
  11089. * function isEven(n) {
  11090. * return n % 2 == 0;
  11091. * }
  11092. *
  11093. * _.filter([1, 2, 3, 4, 5, 6], _.negate(isEven));
  11094. * // => [1, 3, 5]
  11095. */
  11096. function negate(predicate) {
  11097. if (typeof predicate != 'function') {
  11098. throw new TypeError(FUNC_ERROR_TEXT);
  11099. }
  11100. return function() {
  11101. var args = arguments;
  11102. switch (args.length) {
  11103. case 0: return !predicate.call(this);
  11104. case 1: return !predicate.call(this, args[0]);
  11105. case 2: return !predicate.call(this, args[0], args[1]);
  11106. case 3: return !predicate.call(this, args[0], args[1], args[2]);
  11107. }
  11108. return !predicate.apply(this, args);
  11109. };
  11110. }
  11111. /**
  11112. * Creates a function that is restricted to invoking `func` once. Repeat calls
  11113. * to the function return the value of the first invocation. The `func` is
  11114. * invoked with the `this` binding and arguments of the created function.
  11115. *
  11116. * @static
  11117. * @memberOf _
  11118. * @since 0.1.0
  11119. * @category Function
  11120. * @param {Function} func The function to restrict.
  11121. * @returns {Function} Returns the new restricted function.
  11122. * @example
  11123. *
  11124. * var initialize = _.once(createApplication);
  11125. * initialize();
  11126. * initialize();
  11127. * // => `createApplication` is invoked once
  11128. */
  11129. function once(func) {
  11130. return before(2, func);
  11131. }
  11132. /**
  11133. * Creates a function that invokes `func` with its arguments transformed.
  11134. *
  11135. * @static
  11136. * @since 4.0.0
  11137. * @memberOf _
  11138. * @category Function
  11139. * @param {Function} func The function to wrap.
  11140. * @param {...(Function|Function[])} [transforms=[_.identity]]
  11141. * The argument transforms.
  11142. * @returns {Function} Returns the new function.
  11143. * @example
  11144. *
  11145. * function doubled(n) {
  11146. * return n * 2;
  11147. * }
  11148. *
  11149. * function square(n) {
  11150. * return n * n;
  11151. * }
  11152. *
  11153. * var func = _.overArgs(function(x, y) {
  11154. * return [x, y];
  11155. * }, [square, doubled]);
  11156. *
  11157. * func(9, 3);
  11158. * // => [81, 6]
  11159. *
  11160. * func(10, 5);
  11161. * // => [100, 10]
  11162. */
  11163. var overArgs = castRest(function(func, transforms) {
  11164. transforms = (transforms.length == 1 && isArray(transforms[0]))
  11165. ? arrayMap(transforms[0], baseUnary(getIteratee()))
  11166. : arrayMap(baseFlatten(transforms, 1), baseUnary(getIteratee()));
  11167. var funcsLength = transforms.length;
  11168. return baseRest(function(args) {
  11169. var index = -1,
  11170. length = nativeMin(args.length, funcsLength);
  11171. while (++index < length) {
  11172. args[index] = transforms[index].call(this, args[index]);
  11173. }
  11174. return apply(func, this, args);
  11175. });
  11176. });
  11177. /**
  11178. * Creates a function that invokes `func` with `partials` prepended to the
  11179. * arguments it receives. This method is like `_.bind` except it does **not**
  11180. * alter the `this` binding.
  11181. *
  11182. * The `_.partial.placeholder` value, which defaults to `_` in monolithic
  11183. * builds, may be used as a placeholder for partially applied arguments.
  11184. *
  11185. * **Note:** This method doesn't set the "length" property of partially
  11186. * applied functions.
  11187. *
  11188. * @static
  11189. * @memberOf _
  11190. * @since 0.2.0
  11191. * @category Function
  11192. * @param {Function} func The function to partially apply arguments to.
  11193. * @param {...*} [partials] The arguments to be partially applied.
  11194. * @returns {Function} Returns the new partially applied function.
  11195. * @example
  11196. *
  11197. * function greet(greeting, name) {
  11198. * return greeting + ' ' + name;
  11199. * }
  11200. *
  11201. * var sayHelloTo = _.partial(greet, 'hello');
  11202. * sayHelloTo('fred');
  11203. * // => 'hello fred'
  11204. *
  11205. * // Partially applied with placeholders.
  11206. * var greetFred = _.partial(greet, _, 'fred');
  11207. * greetFred('hi');
  11208. * // => 'hi fred'
  11209. */
  11210. var partial = baseRest(function(func, partials) {
  11211. var holders = replaceHolders(partials, getHolder(partial));
  11212. return createWrap(func, WRAP_PARTIAL_FLAG, undefined, partials, holders);
  11213. });
  11214. /**
  11215. * This method is like `_.partial` except that partially applied arguments
  11216. * are appended to the arguments it receives.
  11217. *
  11218. * The `_.partialRight.placeholder` value, which defaults to `_` in monolithic
  11219. * builds, may be used as a placeholder for partially applied arguments.
  11220. *
  11221. * **Note:** This method doesn't set the "length" property of partially
  11222. * applied functions.
  11223. *
  11224. * @static
  11225. * @memberOf _
  11226. * @since 1.0.0
  11227. * @category Function
  11228. * @param {Function} func The function to partially apply arguments to.
  11229. * @param {...*} [partials] The arguments to be partially applied.
  11230. * @returns {Function} Returns the new partially applied function.
  11231. * @example
  11232. *
  11233. * function greet(greeting, name) {
  11234. * return greeting + ' ' + name;
  11235. * }
  11236. *
  11237. * var greetFred = _.partialRight(greet, 'fred');
  11238. * greetFred('hi');
  11239. * // => 'hi fred'
  11240. *
  11241. * // Partially applied with placeholders.
  11242. * var sayHelloTo = _.partialRight(greet, 'hello', _);
  11243. * sayHelloTo('fred');
  11244. * // => 'hello fred'
  11245. */
  11246. var partialRight = baseRest(function(func, partials) {
  11247. var holders = replaceHolders(partials, getHolder(partialRight));
  11248. return createWrap(func, WRAP_PARTIAL_RIGHT_FLAG, undefined, partials, holders);
  11249. });
  11250. /**
  11251. * Creates a function that invokes `func` with arguments arranged according
  11252. * to the specified `indexes` where the argument value at the first index is
  11253. * provided as the first argument, the argument value at the second index is
  11254. * provided as the second argument, and so on.
  11255. *
  11256. * @static
  11257. * @memberOf _
  11258. * @since 3.0.0
  11259. * @category Function
  11260. * @param {Function} func The function to rearrange arguments for.
  11261. * @param {...(number|number[])} indexes The arranged argument indexes.
  11262. * @returns {Function} Returns the new function.
  11263. * @example
  11264. *
  11265. * var rearged = _.rearg(function(a, b, c) {
  11266. * return [a, b, c];
  11267. * }, [2, 0, 1]);
  11268. *
  11269. * rearged('b', 'c', 'a')
  11270. * // => ['a', 'b', 'c']
  11271. */
  11272. var rearg = flatRest(function(func, indexes) {
  11273. return createWrap(func, WRAP_REARG_FLAG, undefined, undefined, undefined, indexes);
  11274. });
  11275. /**
  11276. * Creates a function that invokes `func` with the `this` binding of the
  11277. * created function and arguments from `start` and beyond provided as
  11278. * an array.
  11279. *
  11280. * **Note:** This method is based on the
  11281. * [rest parameter](https://mdn.io/rest_parameters).
  11282. *
  11283. * @static
  11284. * @memberOf _
  11285. * @since 4.0.0
  11286. * @category Function
  11287. * @param {Function} func The function to apply a rest parameter to.
  11288. * @param {number} [start=func.length-1] The start position of the rest parameter.
  11289. * @returns {Function} Returns the new function.
  11290. * @example
  11291. *
  11292. * var say = _.rest(function(what, names) {
  11293. * return what + ' ' + _.initial(names).join(', ') +
  11294. * (_.size(names) > 1 ? ', & ' : '') + _.last(names);
  11295. * });
  11296. *
  11297. * say('hello', 'fred', 'barney', 'pebbles');
  11298. * // => 'hello fred, barney, & pebbles'
  11299. */
  11300. function rest(func, start) {
  11301. if (typeof func != 'function') {
  11302. throw new TypeError(FUNC_ERROR_TEXT);
  11303. }
  11304. start = start === undefined ? start : toInteger(start);
  11305. return baseRest(func, start);
  11306. }
  11307. /**
  11308. * Creates a function that invokes `func` with the `this` binding of the
  11309. * create function and an array of arguments much like
  11310. * [`Function#apply`](http://www.ecma-international.org/ecma-262/7.0/#sec-function.prototype.apply).
  11311. *
  11312. * **Note:** This method is based on the
  11313. * [spread operator](https://mdn.io/spread_operator).
  11314. *
  11315. * @static
  11316. * @memberOf _
  11317. * @since 3.2.0
  11318. * @category Function
  11319. * @param {Function} func The function to spread arguments over.
  11320. * @param {number} [start=0] The start position of the spread.
  11321. * @returns {Function} Returns the new function.
  11322. * @example
  11323. *
  11324. * var say = _.spread(function(who, what) {
  11325. * return who + ' says ' + what;
  11326. * });
  11327. *
  11328. * say(['fred', 'hello']);
  11329. * // => 'fred says hello'
  11330. *
  11331. * var numbers = Promise.all([
  11332. * Promise.resolve(40),
  11333. * Promise.resolve(36)
  11334. * ]);
  11335. *
  11336. * numbers.then(_.spread(function(x, y) {
  11337. * return x + y;
  11338. * }));
  11339. * // => a Promise of 76
  11340. */
  11341. function spread(func, start) {
  11342. if (typeof func != 'function') {
  11343. throw new TypeError(FUNC_ERROR_TEXT);
  11344. }
  11345. start = start == null ? 0 : nativeMax(toInteger(start), 0);
  11346. return baseRest(function(args) {
  11347. var array = args[start],
  11348. otherArgs = castSlice(args, 0, start);
  11349. if (array) {
  11350. arrayPush(otherArgs, array);
  11351. }
  11352. return apply(func, this, otherArgs);
  11353. });
  11354. }
  11355. /**
  11356. * Creates a throttled function that only invokes `func` at most once per
  11357. * every `wait` milliseconds. The throttled function comes with a `cancel`
  11358. * method to cancel delayed `func` invocations and a `flush` method to
  11359. * immediately invoke them. Provide `options` to indicate whether `func`
  11360. * should be invoked on the leading and/or trailing edge of the `wait`
  11361. * timeout. The `func` is invoked with the last arguments provided to the
  11362. * throttled function. Subsequent calls to the throttled function return the
  11363. * result of the last `func` invocation.
  11364. *
  11365. * **Note:** If `leading` and `trailing` options are `true`, `func` is
  11366. * invoked on the trailing edge of the timeout only if the throttled function
  11367. * is invoked more than once during the `wait` timeout.
  11368. *
  11369. * If `wait` is `0` and `leading` is `false`, `func` invocation is deferred
  11370. * until to the next tick, similar to `setTimeout` with a timeout of `0`.
  11371. *
  11372. * See [David Corbacho's article](https://css-tricks.com/debouncing-throttling-explained-examples/)
  11373. * for details over the differences between `_.throttle` and `_.debounce`.
  11374. *
  11375. * @static
  11376. * @memberOf _
  11377. * @since 0.1.0
  11378. * @category Function
  11379. * @param {Function} func The function to throttle.
  11380. * @param {number} [wait=0] The number of milliseconds to throttle invocations to.
  11381. * @param {Object} [options={}] The options object.
  11382. * @param {boolean} [options.leading=true]
  11383. * Specify invoking on the leading edge of the timeout.
  11384. * @param {boolean} [options.trailing=true]
  11385. * Specify invoking on the trailing edge of the timeout.
  11386. * @returns {Function} Returns the new throttled function.
  11387. * @example
  11388. *
  11389. * // Avoid excessively updating the position while scrolling.
  11390. * jQuery(window).on('scroll', _.throttle(updatePosition, 100));
  11391. *
  11392. * // Invoke `renewToken` when the click event is fired, but not more than once every 5 minutes.
  11393. * var throttled = _.throttle(renewToken, 300000, { 'trailing': false });
  11394. * jQuery(element).on('click', throttled);
  11395. *
  11396. * // Cancel the trailing throttled invocation.
  11397. * jQuery(window).on('popstate', throttled.cancel);
  11398. */
  11399. function throttle(func, wait, options) {
  11400. var leading = true,
  11401. trailing = true;
  11402. if (typeof func != 'function') {
  11403. throw new TypeError(FUNC_ERROR_TEXT);
  11404. }
  11405. if (isObject(options)) {
  11406. leading = 'leading' in options ? !!options.leading : leading;
  11407. trailing = 'trailing' in options ? !!options.trailing : trailing;
  11408. }
  11409. return debounce(func, wait, {
  11410. 'leading': leading,
  11411. 'maxWait': wait,
  11412. 'trailing': trailing
  11413. });
  11414. }
  11415. /**
  11416. * Creates a function that accepts up to one argument, ignoring any
  11417. * additional arguments.
  11418. *
  11419. * @static
  11420. * @memberOf _
  11421. * @since 4.0.0
  11422. * @category Function
  11423. * @param {Function} func The function to cap arguments for.
  11424. * @returns {Function} Returns the new capped function.
  11425. * @example
  11426. *
  11427. * _.map(['6', '8', '10'], _.unary(parseInt));
  11428. * // => [6, 8, 10]
  11429. */
  11430. function unary(func) {
  11431. return ary(func, 1);
  11432. }
  11433. /**
  11434. * Creates a function that provides `value` to `wrapper` as its first
  11435. * argument. Any additional arguments provided to the function are appended
  11436. * to those provided to the `wrapper`. The wrapper is invoked with the `this`
  11437. * binding of the created function.
  11438. *
  11439. * @static
  11440. * @memberOf _
  11441. * @since 0.1.0
  11442. * @category Function
  11443. * @param {*} value The value to wrap.
  11444. * @param {Function} [wrapper=identity] The wrapper function.
  11445. * @returns {Function} Returns the new function.
  11446. * @example
  11447. *
  11448. * var p = _.wrap(_.escape, function(func, text) {
  11449. * return '<p>' + func(text) + '</p>';
  11450. * });
  11451. *
  11452. * p('fred, barney, & pebbles');
  11453. * // => '<p>fred, barney, &amp; pebbles</p>'
  11454. */
  11455. function wrap(value, wrapper) {
  11456. return partial(castFunction(wrapper), value);
  11457. }
  11458. /*------------------------------------------------------------------------*/
  11459. /**
  11460. * Casts `value` as an array if it's not one.
  11461. *
  11462. * @static
  11463. * @memberOf _
  11464. * @since 4.4.0
  11465. * @category Lang
  11466. * @param {*} value The value to inspect.
  11467. * @returns {Array} Returns the cast array.
  11468. * @example
  11469. *
  11470. * _.castArray(1);
  11471. * // => [1]
  11472. *
  11473. * _.castArray({ 'a': 1 });
  11474. * // => [{ 'a': 1 }]
  11475. *
  11476. * _.castArray('abc');
  11477. * // => ['abc']
  11478. *
  11479. * _.castArray(null);
  11480. * // => [null]
  11481. *
  11482. * _.castArray(undefined);
  11483. * // => [undefined]
  11484. *
  11485. * _.castArray();
  11486. * // => []
  11487. *
  11488. * var array = [1, 2, 3];
  11489. * console.log(_.castArray(array) === array);
  11490. * // => true
  11491. */
  11492. function castArray() {
  11493. if (!arguments.length) {
  11494. return [];
  11495. }
  11496. var value = arguments[0];
  11497. return isArray(value) ? value : [value];
  11498. }
  11499. /**
  11500. * Creates a shallow clone of `value`.
  11501. *
  11502. * **Note:** This method is loosely based on the
  11503. * [structured clone algorithm](https://mdn.io/Structured_clone_algorithm)
  11504. * and supports cloning arrays, array buffers, booleans, date objects, maps,
  11505. * numbers, `Object` objects, regexes, sets, strings, symbols, and typed
  11506. * arrays. The own enumerable properties of `arguments` objects are cloned
  11507. * as plain objects. An empty object is returned for uncloneable values such
  11508. * as error objects, functions, DOM nodes, and WeakMaps.
  11509. *
  11510. * @static
  11511. * @memberOf _
  11512. * @since 0.1.0
  11513. * @category Lang
  11514. * @param {*} value The value to clone.
  11515. * @returns {*} Returns the cloned value.
  11516. * @see _.cloneDeep
  11517. * @example
  11518. *
  11519. * var objects = [{ 'a': 1 }, { 'b': 2 }];
  11520. *
  11521. * var shallow = _.clone(objects);
  11522. * console.log(shallow[0] === objects[0]);
  11523. * // => true
  11524. */
  11525. function clone(value) {
  11526. return baseClone(value, CLONE_SYMBOLS_FLAG);
  11527. }
  11528. /**
  11529. * This method is like `_.clone` except that it accepts `customizer` which
  11530. * is invoked to produce the cloned value. If `customizer` returns `undefined`,
  11531. * cloning is handled by the method instead. The `customizer` is invoked with
  11532. * up to four arguments; (value [, index|key, object, stack]).
  11533. *
  11534. * @static
  11535. * @memberOf _
  11536. * @since 4.0.0
  11537. * @category Lang
  11538. * @param {*} value The value to clone.
  11539. * @param {Function} [customizer] The function to customize cloning.
  11540. * @returns {*} Returns the cloned value.
  11541. * @see _.cloneDeepWith
  11542. * @example
  11543. *
  11544. * function customizer(value) {
  11545. * if (_.isElement(value)) {
  11546. * return value.cloneNode(false);
  11547. * }
  11548. * }
  11549. *
  11550. * var el = _.cloneWith(document.body, customizer);
  11551. *
  11552. * console.log(el === document.body);
  11553. * // => false
  11554. * console.log(el.nodeName);
  11555. * // => 'BODY'
  11556. * console.log(el.childNodes.length);
  11557. * // => 0
  11558. */
  11559. function cloneWith(value, customizer) {
  11560. customizer = typeof customizer == 'function' ? customizer : undefined;
  11561. return baseClone(value, CLONE_SYMBOLS_FLAG, customizer);
  11562. }
  11563. /**
  11564. * This method is like `_.clone` except that it recursively clones `value`.
  11565. *
  11566. * @static
  11567. * @memberOf _
  11568. * @since 1.0.0
  11569. * @category Lang
  11570. * @param {*} value The value to recursively clone.
  11571. * @returns {*} Returns the deep cloned value.
  11572. * @see _.clone
  11573. * @example
  11574. *
  11575. * var objects = [{ 'a': 1 }, { 'b': 2 }];
  11576. *
  11577. * var deep = _.cloneDeep(objects);
  11578. * console.log(deep[0] === objects[0]);
  11579. * // => false
  11580. */
  11581. function cloneDeep(value) {
  11582. return baseClone(value, CLONE_DEEP_FLAG | CLONE_SYMBOLS_FLAG);
  11583. }
  11584. /**
  11585. * This method is like `_.cloneWith` except that it recursively clones `value`.
  11586. *
  11587. * @static
  11588. * @memberOf _
  11589. * @since 4.0.0
  11590. * @category Lang
  11591. * @param {*} value The value to recursively clone.
  11592. * @param {Function} [customizer] The function to customize cloning.
  11593. * @returns {*} Returns the deep cloned value.
  11594. * @see _.cloneWith
  11595. * @example
  11596. *
  11597. * function customizer(value) {
  11598. * if (_.isElement(value)) {
  11599. * return value.cloneNode(true);
  11600. * }
  11601. * }
  11602. *
  11603. * var el = _.cloneDeepWith(document.body, customizer);
  11604. *
  11605. * console.log(el === document.body);
  11606. * // => false
  11607. * console.log(el.nodeName);
  11608. * // => 'BODY'
  11609. * console.log(el.childNodes.length);
  11610. * // => 20
  11611. */
  11612. function cloneDeepWith(value, customizer) {
  11613. customizer = typeof customizer == 'function' ? customizer : undefined;
  11614. return baseClone(value, CLONE_DEEP_FLAG | CLONE_SYMBOLS_FLAG, customizer);
  11615. }
  11616. /**
  11617. * Checks if `object` conforms to `source` by invoking the predicate
  11618. * properties of `source` with the corresponding property values of `object`.
  11619. *
  11620. * **Note:** This method is equivalent to `_.conforms` when `source` is
  11621. * partially applied.
  11622. *
  11623. * @static
  11624. * @memberOf _
  11625. * @since 4.14.0
  11626. * @category Lang
  11627. * @param {Object} object The object to inspect.
  11628. * @param {Object} source The object of property predicates to conform to.
  11629. * @returns {boolean} Returns `true` if `object` conforms, else `false`.
  11630. * @example
  11631. *
  11632. * var object = { 'a': 1, 'b': 2 };
  11633. *
  11634. * _.conformsTo(object, { 'b': function(n) { return n > 1; } });
  11635. * // => true
  11636. *
  11637. * _.conformsTo(object, { 'b': function(n) { return n > 2; } });
  11638. * // => false
  11639. */
  11640. function conformsTo(object, source) {
  11641. return source == null || baseConformsTo(object, source, keys(source));
  11642. }
  11643. /**
  11644. * Performs a
  11645. * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
  11646. * comparison between two values to determine if they are equivalent.
  11647. *
  11648. * @static
  11649. * @memberOf _
  11650. * @since 4.0.0
  11651. * @category Lang
  11652. * @param {*} value The value to compare.
  11653. * @param {*} other The other value to compare.
  11654. * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
  11655. * @example
  11656. *
  11657. * var object = { 'a': 1 };
  11658. * var other = { 'a': 1 };
  11659. *
  11660. * _.eq(object, object);
  11661. * // => true
  11662. *
  11663. * _.eq(object, other);
  11664. * // => false
  11665. *
  11666. * _.eq('a', 'a');
  11667. * // => true
  11668. *
  11669. * _.eq('a', Object('a'));
  11670. * // => false
  11671. *
  11672. * _.eq(NaN, NaN);
  11673. * // => true
  11674. */
  11675. function eq(value, other) {
  11676. return value === other || (value !== value && other !== other);
  11677. }
  11678. /**
  11679. * Checks if `value` is greater than `other`.
  11680. *
  11681. * @static
  11682. * @memberOf _
  11683. * @since 3.9.0
  11684. * @category Lang
  11685. * @param {*} value The value to compare.
  11686. * @param {*} other The other value to compare.
  11687. * @returns {boolean} Returns `true` if `value` is greater than `other`,
  11688. * else `false`.
  11689. * @see _.lt
  11690. * @example
  11691. *
  11692. * _.gt(3, 1);
  11693. * // => true
  11694. *
  11695. * _.gt(3, 3);
  11696. * // => false
  11697. *
  11698. * _.gt(1, 3);
  11699. * // => false
  11700. */
  11701. var gt = createRelationalOperation(baseGt);
  11702. /**
  11703. * Checks if `value` is greater than or equal to `other`.
  11704. *
  11705. * @static
  11706. * @memberOf _
  11707. * @since 3.9.0
  11708. * @category Lang
  11709. * @param {*} value The value to compare.
  11710. * @param {*} other The other value to compare.
  11711. * @returns {boolean} Returns `true` if `value` is greater than or equal to
  11712. * `other`, else `false`.
  11713. * @see _.lte
  11714. * @example
  11715. *
  11716. * _.gte(3, 1);
  11717. * // => true
  11718. *
  11719. * _.gte(3, 3);
  11720. * // => true
  11721. *
  11722. * _.gte(1, 3);
  11723. * // => false
  11724. */
  11725. var gte = createRelationalOperation(function(value, other) {
  11726. return value >= other;
  11727. });
  11728. /**
  11729. * Checks if `value` is likely an `arguments` object.
  11730. *
  11731. * @static
  11732. * @memberOf _
  11733. * @since 0.1.0
  11734. * @category Lang
  11735. * @param {*} value The value to check.
  11736. * @returns {boolean} Returns `true` if `value` is an `arguments` object,
  11737. * else `false`.
  11738. * @example
  11739. *
  11740. * _.isArguments(function() { return arguments; }());
  11741. * // => true
  11742. *
  11743. * _.isArguments([1, 2, 3]);
  11744. * // => false
  11745. */
  11746. var isArguments = baseIsArguments(function() { return arguments; }()) ? baseIsArguments : function(value) {
  11747. return isObjectLike(value) && hasOwnProperty.call(value, 'callee') &&
  11748. !propertyIsEnumerable.call(value, 'callee');
  11749. };
  11750. /**
  11751. * Checks if `value` is classified as an `Array` object.
  11752. *
  11753. * @static
  11754. * @memberOf _
  11755. * @since 0.1.0
  11756. * @category Lang
  11757. * @param {*} value The value to check.
  11758. * @returns {boolean} Returns `true` if `value` is an array, else `false`.
  11759. * @example
  11760. *
  11761. * _.isArray([1, 2, 3]);
  11762. * // => true
  11763. *
  11764. * _.isArray(document.body.children);
  11765. * // => false
  11766. *
  11767. * _.isArray('abc');
  11768. * // => false
  11769. *
  11770. * _.isArray(_.noop);
  11771. * // => false
  11772. */
  11773. var isArray = Array.isArray;
  11774. /**
  11775. * Checks if `value` is classified as an `ArrayBuffer` object.
  11776. *
  11777. * @static
  11778. * @memberOf _
  11779. * @since 4.3.0
  11780. * @category Lang
  11781. * @param {*} value The value to check.
  11782. * @returns {boolean} Returns `true` if `value` is an array buffer, else `false`.
  11783. * @example
  11784. *
  11785. * _.isArrayBuffer(new ArrayBuffer(2));
  11786. * // => true
  11787. *
  11788. * _.isArrayBuffer(new Array(2));
  11789. * // => false
  11790. */
  11791. var isArrayBuffer = nodeIsArrayBuffer ? baseUnary(nodeIsArrayBuffer) : baseIsArrayBuffer;
  11792. /**
  11793. * Checks if `value` is array-like. A value is considered array-like if it's
  11794. * not a function and has a `value.length` that's an integer greater than or
  11795. * equal to `0` and less than or equal to `Number.MAX_SAFE_INTEGER`.
  11796. *
  11797. * @static
  11798. * @memberOf _
  11799. * @since 4.0.0
  11800. * @category Lang
  11801. * @param {*} value The value to check.
  11802. * @returns {boolean} Returns `true` if `value` is array-like, else `false`.
  11803. * @example
  11804. *
  11805. * _.isArrayLike([1, 2, 3]);
  11806. * // => true
  11807. *
  11808. * _.isArrayLike(document.body.children);
  11809. * // => true
  11810. *
  11811. * _.isArrayLike('abc');
  11812. * // => true
  11813. *
  11814. * _.isArrayLike(_.noop);
  11815. * // => false
  11816. */
  11817. function isArrayLike(value) {
  11818. return value != null && isLength(value.length) && !isFunction(value);
  11819. }
  11820. /**
  11821. * This method is like `_.isArrayLike` except that it also checks if `value`
  11822. * is an object.
  11823. *
  11824. * @static
  11825. * @memberOf _
  11826. * @since 4.0.0
  11827. * @category Lang
  11828. * @param {*} value The value to check.
  11829. * @returns {boolean} Returns `true` if `value` is an array-like object,
  11830. * else `false`.
  11831. * @example
  11832. *
  11833. * _.isArrayLikeObject([1, 2, 3]);
  11834. * // => true
  11835. *
  11836. * _.isArrayLikeObject(document.body.children);
  11837. * // => true
  11838. *
  11839. * _.isArrayLikeObject('abc');
  11840. * // => false
  11841. *
  11842. * _.isArrayLikeObject(_.noop);
  11843. * // => false
  11844. */
  11845. function isArrayLikeObject(value) {
  11846. return isObjectLike(value) && isArrayLike(value);
  11847. }
  11848. /**
  11849. * Checks if `value` is classified as a boolean primitive or object.
  11850. *
  11851. * @static
  11852. * @memberOf _
  11853. * @since 0.1.0
  11854. * @category Lang
  11855. * @param {*} value The value to check.
  11856. * @returns {boolean} Returns `true` if `value` is a boolean, else `false`.
  11857. * @example
  11858. *
  11859. * _.isBoolean(false);
  11860. * // => true
  11861. *
  11862. * _.isBoolean(null);
  11863. * // => false
  11864. */
  11865. function isBoolean(value) {
  11866. return value === true || value === false ||
  11867. (isObjectLike(value) && baseGetTag(value) == boolTag);
  11868. }
  11869. /**
  11870. * Checks if `value` is a buffer.
  11871. *
  11872. * @static
  11873. * @memberOf _
  11874. * @since 4.3.0
  11875. * @category Lang
  11876. * @param {*} value The value to check.
  11877. * @returns {boolean} Returns `true` if `value` is a buffer, else `false`.
  11878. * @example
  11879. *
  11880. * _.isBuffer(new Buffer(2));
  11881. * // => true
  11882. *
  11883. * _.isBuffer(new Uint8Array(2));
  11884. * // => false
  11885. */
  11886. var isBuffer = nativeIsBuffer || stubFalse;
  11887. /**
  11888. * Checks if `value` is classified as a `Date` object.
  11889. *
  11890. * @static
  11891. * @memberOf _
  11892. * @since 0.1.0
  11893. * @category Lang
  11894. * @param {*} value The value to check.
  11895. * @returns {boolean} Returns `true` if `value` is a date object, else `false`.
  11896. * @example
  11897. *
  11898. * _.isDate(new Date);
  11899. * // => true
  11900. *
  11901. * _.isDate('Mon April 23 2012');
  11902. * // => false
  11903. */
  11904. var isDate = nodeIsDate ? baseUnary(nodeIsDate) : baseIsDate;
  11905. /**
  11906. * Checks if `value` is likely a DOM element.
  11907. *
  11908. * @static
  11909. * @memberOf _
  11910. * @since 0.1.0
  11911. * @category Lang
  11912. * @param {*} value The value to check.
  11913. * @returns {boolean} Returns `true` if `value` is a DOM element, else `false`.
  11914. * @example
  11915. *
  11916. * _.isElement(document.body);
  11917. * // => true
  11918. *
  11919. * _.isElement('<body>');
  11920. * // => false
  11921. */
  11922. function isElement(value) {
  11923. return isObjectLike(value) && value.nodeType === 1 && !isPlainObject(value);
  11924. }
  11925. /**
  11926. * Checks if `value` is an empty object, collection, map, or set.
  11927. *
  11928. * Objects are considered empty if they have no own enumerable string keyed
  11929. * properties.
  11930. *
  11931. * Array-like values such as `arguments` objects, arrays, buffers, strings, or
  11932. * jQuery-like collections are considered empty if they have a `length` of `0`.
  11933. * Similarly, maps and sets are considered empty if they have a `size` of `0`.
  11934. *
  11935. * @static
  11936. * @memberOf _
  11937. * @since 0.1.0
  11938. * @category Lang
  11939. * @param {*} value The value to check.
  11940. * @returns {boolean} Returns `true` if `value` is empty, else `false`.
  11941. * @example
  11942. *
  11943. * _.isEmpty(null);
  11944. * // => true
  11945. *
  11946. * _.isEmpty(true);
  11947. * // => true
  11948. *
  11949. * _.isEmpty(1);
  11950. * // => true
  11951. *
  11952. * _.isEmpty([1, 2, 3]);
  11953. * // => false
  11954. *
  11955. * _.isEmpty({ 'a': 1 });
  11956. * // => false
  11957. */
  11958. function isEmpty(value) {
  11959. if (value == null) {
  11960. return true;
  11961. }
  11962. if (isArrayLike(value) &&
  11963. (isArray(value) || typeof value == 'string' || typeof value.splice == 'function' ||
  11964. isBuffer(value) || isTypedArray(value) || isArguments(value))) {
  11965. return !value.length;
  11966. }
  11967. var tag = getTag(value);
  11968. if (tag == mapTag || tag == setTag) {
  11969. return !value.size;
  11970. }
  11971. if (isPrototype(value)) {
  11972. return !baseKeys(value).length;
  11973. }
  11974. for (var key in value) {
  11975. if (hasOwnProperty.call(value, key)) {
  11976. return false;
  11977. }
  11978. }
  11979. return true;
  11980. }
  11981. /**
  11982. * Performs a deep comparison between two values to determine if they are
  11983. * equivalent.
  11984. *
  11985. * **Note:** This method supports comparing arrays, array buffers, booleans,
  11986. * date objects, error objects, maps, numbers, `Object` objects, regexes,
  11987. * sets, strings, symbols, and typed arrays. `Object` objects are compared
  11988. * by their own, not inherited, enumerable properties. Functions and DOM
  11989. * nodes are compared by strict equality, i.e. `===`.
  11990. *
  11991. * @static
  11992. * @memberOf _
  11993. * @since 0.1.0
  11994. * @category Lang
  11995. * @param {*} value The value to compare.
  11996. * @param {*} other The other value to compare.
  11997. * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
  11998. * @example
  11999. *
  12000. * var object = { 'a': 1 };
  12001. * var other = { 'a': 1 };
  12002. *
  12003. * _.isEqual(object, other);
  12004. * // => true
  12005. *
  12006. * object === other;
  12007. * // => false
  12008. */
  12009. function isEqual(value, other) {
  12010. return baseIsEqual(value, other);
  12011. }
  12012. /**
  12013. * This method is like `_.isEqual` except that it accepts `customizer` which
  12014. * is invoked to compare values. If `customizer` returns `undefined`, comparisons
  12015. * are handled by the method instead. The `customizer` is invoked with up to
  12016. * six arguments: (objValue, othValue [, index|key, object, other, stack]).
  12017. *
  12018. * @static
  12019. * @memberOf _
  12020. * @since 4.0.0
  12021. * @category Lang
  12022. * @param {*} value The value to compare.
  12023. * @param {*} other The other value to compare.
  12024. * @param {Function} [customizer] The function to customize comparisons.
  12025. * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
  12026. * @example
  12027. *
  12028. * function isGreeting(value) {
  12029. * return /^h(?:i|ello)$/.test(value);
  12030. * }
  12031. *
  12032. * function customizer(objValue, othValue) {
  12033. * if (isGreeting(objValue) && isGreeting(othValue)) {
  12034. * return true;
  12035. * }
  12036. * }
  12037. *
  12038. * var array = ['hello', 'goodbye'];
  12039. * var other = ['hi', 'goodbye'];
  12040. *
  12041. * _.isEqualWith(array, other, customizer);
  12042. * // => true
  12043. */
  12044. function isEqualWith(value, other, customizer) {
  12045. customizer = typeof customizer == 'function' ? customizer : undefined;
  12046. var result = customizer ? customizer(value, other) : undefined;
  12047. return result === undefined ? baseIsEqual(value, other, undefined, customizer) : !!result;
  12048. }
  12049. /**
  12050. * Checks if `value` is an `Error`, `EvalError`, `RangeError`, `ReferenceError`,
  12051. * `SyntaxError`, `TypeError`, or `URIError` object.
  12052. *
  12053. * @static
  12054. * @memberOf _
  12055. * @since 3.0.0
  12056. * @category Lang
  12057. * @param {*} value The value to check.
  12058. * @returns {boolean} Returns `true` if `value` is an error object, else `false`.
  12059. * @example
  12060. *
  12061. * _.isError(new Error);
  12062. * // => true
  12063. *
  12064. * _.isError(Error);
  12065. * // => false
  12066. */
  12067. function isError(value) {
  12068. if (!isObjectLike(value)) {
  12069. return false;
  12070. }
  12071. var tag = baseGetTag(value);
  12072. return tag == errorTag || tag == domExcTag ||
  12073. (typeof value.message == 'string' && typeof value.name == 'string' && !isPlainObject(value));
  12074. }
  12075. /**
  12076. * Checks if `value` is a finite primitive number.
  12077. *
  12078. * **Note:** This method is based on
  12079. * [`Number.isFinite`](https://mdn.io/Number/isFinite).
  12080. *
  12081. * @static
  12082. * @memberOf _
  12083. * @since 0.1.0
  12084. * @category Lang
  12085. * @param {*} value The value to check.
  12086. * @returns {boolean} Returns `true` if `value` is a finite number, else `false`.
  12087. * @example
  12088. *
  12089. * _.isFinite(3);
  12090. * // => true
  12091. *
  12092. * _.isFinite(Number.MIN_VALUE);
  12093. * // => true
  12094. *
  12095. * _.isFinite(Infinity);
  12096. * // => false
  12097. *
  12098. * _.isFinite('3');
  12099. * // => false
  12100. */
  12101. function isFinite(value) {
  12102. return typeof value == 'number' && nativeIsFinite(value);
  12103. }
  12104. /**
  12105. * Checks if `value` is classified as a `Function` object.
  12106. *
  12107. * @static
  12108. * @memberOf _
  12109. * @since 0.1.0
  12110. * @category Lang
  12111. * @param {*} value The value to check.
  12112. * @returns {boolean} Returns `true` if `value` is a function, else `false`.
  12113. * @example
  12114. *
  12115. * _.isFunction(_);
  12116. * // => true
  12117. *
  12118. * _.isFunction(/abc/);
  12119. * // => false
  12120. */
  12121. function isFunction(value) {
  12122. if (!isObject(value)) {
  12123. return false;
  12124. }
  12125. // The use of `Object#toString` avoids issues with the `typeof` operator
  12126. // in Safari 9 which returns 'object' for typed arrays and other constructors.
  12127. var tag = baseGetTag(value);
  12128. return tag == funcTag || tag == genTag || tag == asyncTag || tag == proxyTag;
  12129. }
  12130. /**
  12131. * Checks if `value` is an integer.
  12132. *
  12133. * **Note:** This method is based on
  12134. * [`Number.isInteger`](https://mdn.io/Number/isInteger).
  12135. *
  12136. * @static
  12137. * @memberOf _
  12138. * @since 4.0.0
  12139. * @category Lang
  12140. * @param {*} value The value to check.
  12141. * @returns {boolean} Returns `true` if `value` is an integer, else `false`.
  12142. * @example
  12143. *
  12144. * _.isInteger(3);
  12145. * // => true
  12146. *
  12147. * _.isInteger(Number.MIN_VALUE);
  12148. * // => false
  12149. *
  12150. * _.isInteger(Infinity);
  12151. * // => false
  12152. *
  12153. * _.isInteger('3');
  12154. * // => false
  12155. */
  12156. function isInteger(value) {
  12157. return typeof value == 'number' && value == toInteger(value);
  12158. }
  12159. /**
  12160. * Checks if `value` is a valid array-like length.
  12161. *
  12162. * **Note:** This method is loosely based on
  12163. * [`ToLength`](http://ecma-international.org/ecma-262/7.0/#sec-tolength).
  12164. *
  12165. * @static
  12166. * @memberOf _
  12167. * @since 4.0.0
  12168. * @category Lang
  12169. * @param {*} value The value to check.
  12170. * @returns {boolean} Returns `true` if `value` is a valid length, else `false`.
  12171. * @example
  12172. *
  12173. * _.isLength(3);
  12174. * // => true
  12175. *
  12176. * _.isLength(Number.MIN_VALUE);
  12177. * // => false
  12178. *
  12179. * _.isLength(Infinity);
  12180. * // => false
  12181. *
  12182. * _.isLength('3');
  12183. * // => false
  12184. */
  12185. function isLength(value) {
  12186. return typeof value == 'number' &&
  12187. value > -1 && value % 1 == 0 && value <= MAX_SAFE_INTEGER;
  12188. }
  12189. /**
  12190. * Checks if `value` is the
  12191. * [language type](http://www.ecma-international.org/ecma-262/7.0/#sec-ecmascript-language-types)
  12192. * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
  12193. *
  12194. * @static
  12195. * @memberOf _
  12196. * @since 0.1.0
  12197. * @category Lang
  12198. * @param {*} value The value to check.
  12199. * @returns {boolean} Returns `true` if `value` is an object, else `false`.
  12200. * @example
  12201. *
  12202. * _.isObject({});
  12203. * // => true
  12204. *
  12205. * _.isObject([1, 2, 3]);
  12206. * // => true
  12207. *
  12208. * _.isObject(_.noop);
  12209. * // => true
  12210. *
  12211. * _.isObject(null);
  12212. * // => false
  12213. */
  12214. function isObject(value) {
  12215. var type = typeof value;
  12216. return value != null && (type == 'object' || type == 'function');
  12217. }
  12218. /**
  12219. * Checks if `value` is object-like. A value is object-like if it's not `null`
  12220. * and has a `typeof` result of "object".
  12221. *
  12222. * @static
  12223. * @memberOf _
  12224. * @since 4.0.0
  12225. * @category Lang
  12226. * @param {*} value The value to check.
  12227. * @returns {boolean} Returns `true` if `value` is object-like, else `false`.
  12228. * @example
  12229. *
  12230. * _.isObjectLike({});
  12231. * // => true
  12232. *
  12233. * _.isObjectLike([1, 2, 3]);
  12234. * // => true
  12235. *
  12236. * _.isObjectLike(_.noop);
  12237. * // => false
  12238. *
  12239. * _.isObjectLike(null);
  12240. * // => false
  12241. */
  12242. function isObjectLike(value) {
  12243. return value != null && typeof value == 'object';
  12244. }
  12245. /**
  12246. * Checks if `value` is classified as a `Map` object.
  12247. *
  12248. * @static
  12249. * @memberOf _
  12250. * @since 4.3.0
  12251. * @category Lang
  12252. * @param {*} value The value to check.
  12253. * @returns {boolean} Returns `true` if `value` is a map, else `false`.
  12254. * @example
  12255. *
  12256. * _.isMap(new Map);
  12257. * // => true
  12258. *
  12259. * _.isMap(new WeakMap);
  12260. * // => false
  12261. */
  12262. var isMap = nodeIsMap ? baseUnary(nodeIsMap) : baseIsMap;
  12263. /**
  12264. * Performs a partial deep comparison between `object` and `source` to
  12265. * determine if `object` contains equivalent property values.
  12266. *
  12267. * **Note:** This method is equivalent to `_.matches` when `source` is
  12268. * partially applied.
  12269. *
  12270. * Partial comparisons will match empty array and empty object `source`
  12271. * values against any array or object value, respectively. See `_.isEqual`
  12272. * for a list of supported value comparisons.
  12273. *
  12274. * @static
  12275. * @memberOf _
  12276. * @since 3.0.0
  12277. * @category Lang
  12278. * @param {Object} object The object to inspect.
  12279. * @param {Object} source The object of property values to match.
  12280. * @returns {boolean} Returns `true` if `object` is a match, else `false`.
  12281. * @example
  12282. *
  12283. * var object = { 'a': 1, 'b': 2 };
  12284. *
  12285. * _.isMatch(object, { 'b': 2 });
  12286. * // => true
  12287. *
  12288. * _.isMatch(object, { 'b': 1 });
  12289. * // => false
  12290. */
  12291. function isMatch(object, source) {
  12292. return object === source || baseIsMatch(object, source, getMatchData(source));
  12293. }
  12294. /**
  12295. * This method is like `_.isMatch` except that it accepts `customizer` which
  12296. * is invoked to compare values. If `customizer` returns `undefined`, comparisons
  12297. * are handled by the method instead. The `customizer` is invoked with five
  12298. * arguments: (objValue, srcValue, index|key, object, source).
  12299. *
  12300. * @static
  12301. * @memberOf _
  12302. * @since 4.0.0
  12303. * @category Lang
  12304. * @param {Object} object The object to inspect.
  12305. * @param {Object} source The object of property values to match.
  12306. * @param {Function} [customizer] The function to customize comparisons.
  12307. * @returns {boolean} Returns `true` if `object` is a match, else `false`.
  12308. * @example
  12309. *
  12310. * function isGreeting(value) {
  12311. * return /^h(?:i|ello)$/.test(value);
  12312. * }
  12313. *
  12314. * function customizer(objValue, srcValue) {
  12315. * if (isGreeting(objValue) && isGreeting(srcValue)) {
  12316. * return true;
  12317. * }
  12318. * }
  12319. *
  12320. * var object = { 'greeting': 'hello' };
  12321. * var source = { 'greeting': 'hi' };
  12322. *
  12323. * _.isMatchWith(object, source, customizer);
  12324. * // => true
  12325. */
  12326. function isMatchWith(object, source, customizer) {
  12327. customizer = typeof customizer == 'function' ? customizer : undefined;
  12328. return baseIsMatch(object, source, getMatchData(source), customizer);
  12329. }
  12330. /**
  12331. * Checks if `value` is `NaN`.
  12332. *
  12333. * **Note:** This method is based on
  12334. * [`Number.isNaN`](https://mdn.io/Number/isNaN) and is not the same as
  12335. * global [`isNaN`](https://mdn.io/isNaN) which returns `true` for
  12336. * `undefined` and other non-number values.
  12337. *
  12338. * @static
  12339. * @memberOf _
  12340. * @since 0.1.0
  12341. * @category Lang
  12342. * @param {*} value The value to check.
  12343. * @returns {boolean} Returns `true` if `value` is `NaN`, else `false`.
  12344. * @example
  12345. *
  12346. * _.isNaN(NaN);
  12347. * // => true
  12348. *
  12349. * _.isNaN(new Number(NaN));
  12350. * // => true
  12351. *
  12352. * isNaN(undefined);
  12353. * // => true
  12354. *
  12355. * _.isNaN(undefined);
  12356. * // => false
  12357. */
  12358. function isNaN(value) {
  12359. // An `NaN` primitive is the only value that is not equal to itself.
  12360. // Perform the `toStringTag` check first to avoid errors with some
  12361. // ActiveX objects in IE.
  12362. return isNumber(value) && value != +value;
  12363. }
  12364. /**
  12365. * Checks if `value` is a pristine native function.
  12366. *
  12367. * **Note:** This method can't reliably detect native functions in the presence
  12368. * of the core-js package because core-js circumvents this kind of detection.
  12369. * Despite multiple requests, the core-js maintainer has made it clear: any
  12370. * attempt to fix the detection will be obstructed. As a result, we're left
  12371. * with little choice but to throw an error. Unfortunately, this also affects
  12372. * packages, like [babel-polyfill](https://www.npmjs.com/package/babel-polyfill),
  12373. * which rely on core-js.
  12374. *
  12375. * @static
  12376. * @memberOf _
  12377. * @since 3.0.0
  12378. * @category Lang
  12379. * @param {*} value The value to check.
  12380. * @returns {boolean} Returns `true` if `value` is a native function,
  12381. * else `false`.
  12382. * @example
  12383. *
  12384. * _.isNative(Array.prototype.push);
  12385. * // => true
  12386. *
  12387. * _.isNative(_);
  12388. * // => false
  12389. */
  12390. function isNative(value) {
  12391. if (isMaskable(value)) {
  12392. throw new Error(CORE_ERROR_TEXT);
  12393. }
  12394. return baseIsNative(value);
  12395. }
  12396. /**
  12397. * Checks if `value` is `null`.
  12398. *
  12399. * @static
  12400. * @memberOf _
  12401. * @since 0.1.0
  12402. * @category Lang
  12403. * @param {*} value The value to check.
  12404. * @returns {boolean} Returns `true` if `value` is `null`, else `false`.
  12405. * @example
  12406. *
  12407. * _.isNull(null);
  12408. * // => true
  12409. *
  12410. * _.isNull(void 0);
  12411. * // => false
  12412. */
  12413. function isNull(value) {
  12414. return value === null;
  12415. }
  12416. /**
  12417. * Checks if `value` is `null` or `undefined`.
  12418. *
  12419. * @static
  12420. * @memberOf _
  12421. * @since 4.0.0
  12422. * @category Lang
  12423. * @param {*} value The value to check.
  12424. * @returns {boolean} Returns `true` if `value` is nullish, else `false`.
  12425. * @example
  12426. *
  12427. * _.isNil(null);
  12428. * // => true
  12429. *
  12430. * _.isNil(void 0);
  12431. * // => true
  12432. *
  12433. * _.isNil(NaN);
  12434. * // => false
  12435. */
  12436. function isNil(value) {
  12437. return value == null;
  12438. }
  12439. /**
  12440. * Checks if `value` is classified as a `Number` primitive or object.
  12441. *
  12442. * **Note:** To exclude `Infinity`, `-Infinity`, and `NaN`, which are
  12443. * classified as numbers, use the `_.isFinite` method.
  12444. *
  12445. * @static
  12446. * @memberOf _
  12447. * @since 0.1.0
  12448. * @category Lang
  12449. * @param {*} value The value to check.
  12450. * @returns {boolean} Returns `true` if `value` is a number, else `false`.
  12451. * @example
  12452. *
  12453. * _.isNumber(3);
  12454. * // => true
  12455. *
  12456. * _.isNumber(Number.MIN_VALUE);
  12457. * // => true
  12458. *
  12459. * _.isNumber(Infinity);
  12460. * // => true
  12461. *
  12462. * _.isNumber('3');
  12463. * // => false
  12464. */
  12465. function isNumber(value) {
  12466. return typeof value == 'number' ||
  12467. (isObjectLike(value) && baseGetTag(value) == numberTag);
  12468. }
  12469. /**
  12470. * Checks if `value` is a plain object, that is, an object created by the
  12471. * `Object` constructor or one with a `[[Prototype]]` of `null`.
  12472. *
  12473. * @static
  12474. * @memberOf _
  12475. * @since 0.8.0
  12476. * @category Lang
  12477. * @param {*} value The value to check.
  12478. * @returns {boolean} Returns `true` if `value` is a plain object, else `false`.
  12479. * @example
  12480. *
  12481. * function Foo() {
  12482. * this.a = 1;
  12483. * }
  12484. *
  12485. * _.isPlainObject(new Foo);
  12486. * // => false
  12487. *
  12488. * _.isPlainObject([1, 2, 3]);
  12489. * // => false
  12490. *
  12491. * _.isPlainObject({ 'x': 0, 'y': 0 });
  12492. * // => true
  12493. *
  12494. * _.isPlainObject(Object.create(null));
  12495. * // => true
  12496. */
  12497. function isPlainObject(value) {
  12498. if (!isObjectLike(value) || baseGetTag(value) != objectTag) {
  12499. return false;
  12500. }
  12501. var proto = getPrototype(value);
  12502. if (proto === null) {
  12503. return true;
  12504. }
  12505. var Ctor = hasOwnProperty.call(proto, 'constructor') && proto.constructor;
  12506. return typeof Ctor == 'function' && Ctor instanceof Ctor &&
  12507. funcToString.call(Ctor) == objectCtorString;
  12508. }
  12509. /**
  12510. * Checks if `value` is classified as a `RegExp` object.
  12511. *
  12512. * @static
  12513. * @memberOf _
  12514. * @since 0.1.0
  12515. * @category Lang
  12516. * @param {*} value The value to check.
  12517. * @returns {boolean} Returns `true` if `value` is a regexp, else `false`.
  12518. * @example
  12519. *
  12520. * _.isRegExp(/abc/);
  12521. * // => true
  12522. *
  12523. * _.isRegExp('/abc/');
  12524. * // => false
  12525. */
  12526. var isRegExp = nodeIsRegExp ? baseUnary(nodeIsRegExp) : baseIsRegExp;
  12527. /**
  12528. * Checks if `value` is a safe integer. An integer is safe if it's an IEEE-754
  12529. * double precision number which isn't the result of a rounded unsafe integer.
  12530. *
  12531. * **Note:** This method is based on
  12532. * [`Number.isSafeInteger`](https://mdn.io/Number/isSafeInteger).
  12533. *
  12534. * @static
  12535. * @memberOf _
  12536. * @since 4.0.0
  12537. * @category Lang
  12538. * @param {*} value The value to check.
  12539. * @returns {boolean} Returns `true` if `value` is a safe integer, else `false`.
  12540. * @example
  12541. *
  12542. * _.isSafeInteger(3);
  12543. * // => true
  12544. *
  12545. * _.isSafeInteger(Number.MIN_VALUE);
  12546. * // => false
  12547. *
  12548. * _.isSafeInteger(Infinity);
  12549. * // => false
  12550. *
  12551. * _.isSafeInteger('3');
  12552. * // => false
  12553. */
  12554. function isSafeInteger(value) {
  12555. return isInteger(value) && value >= -MAX_SAFE_INTEGER && value <= MAX_SAFE_INTEGER;
  12556. }
  12557. /**
  12558. * Checks if `value` is classified as a `Set` object.
  12559. *
  12560. * @static
  12561. * @memberOf _
  12562. * @since 4.3.0
  12563. * @category Lang
  12564. * @param {*} value The value to check.
  12565. * @returns {boolean} Returns `true` if `value` is a set, else `false`.
  12566. * @example
  12567. *
  12568. * _.isSet(new Set);
  12569. * // => true
  12570. *
  12571. * _.isSet(new WeakSet);
  12572. * // => false
  12573. */
  12574. var isSet = nodeIsSet ? baseUnary(nodeIsSet) : baseIsSet;
  12575. /**
  12576. * Checks if `value` is classified as a `String` primitive or object.
  12577. *
  12578. * @static
  12579. * @since 0.1.0
  12580. * @memberOf _
  12581. * @category Lang
  12582. * @param {*} value The value to check.
  12583. * @returns {boolean} Returns `true` if `value` is a string, else `false`.
  12584. * @example
  12585. *
  12586. * _.isString('abc');
  12587. * // => true
  12588. *
  12589. * _.isString(1);
  12590. * // => false
  12591. */
  12592. function isString(value) {
  12593. return typeof value == 'string' ||
  12594. (!isArray(value) && isObjectLike(value) && baseGetTag(value) == stringTag);
  12595. }
  12596. /**
  12597. * Checks if `value` is classified as a `Symbol` primitive or object.
  12598. *
  12599. * @static
  12600. * @memberOf _
  12601. * @since 4.0.0
  12602. * @category Lang
  12603. * @param {*} value The value to check.
  12604. * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.
  12605. * @example
  12606. *
  12607. * _.isSymbol(Symbol.iterator);
  12608. * // => true
  12609. *
  12610. * _.isSymbol('abc');
  12611. * // => false
  12612. */
  12613. function isSymbol(value) {
  12614. return typeof value == 'symbol' ||
  12615. (isObjectLike(value) && baseGetTag(value) == symbolTag);
  12616. }
  12617. /**
  12618. * Checks if `value` is classified as a typed array.
  12619. *
  12620. * @static
  12621. * @memberOf _
  12622. * @since 3.0.0
  12623. * @category Lang
  12624. * @param {*} value The value to check.
  12625. * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
  12626. * @example
  12627. *
  12628. * _.isTypedArray(new Uint8Array);
  12629. * // => true
  12630. *
  12631. * _.isTypedArray([]);
  12632. * // => false
  12633. */
  12634. var isTypedArray = nodeIsTypedArray ? baseUnary(nodeIsTypedArray) : baseIsTypedArray;
  12635. /**
  12636. * Checks if `value` is `undefined`.
  12637. *
  12638. * @static
  12639. * @since 0.1.0
  12640. * @memberOf _
  12641. * @category Lang
  12642. * @param {*} value The value to check.
  12643. * @returns {boolean} Returns `true` if `value` is `undefined`, else `false`.
  12644. * @example
  12645. *
  12646. * _.isUndefined(void 0);
  12647. * // => true
  12648. *
  12649. * _.isUndefined(null);
  12650. * // => false
  12651. */
  12652. function isUndefined(value) {
  12653. return value === undefined;
  12654. }
  12655. /**
  12656. * Checks if `value` is classified as a `WeakMap` object.
  12657. *
  12658. * @static
  12659. * @memberOf _
  12660. * @since 4.3.0
  12661. * @category Lang
  12662. * @param {*} value The value to check.
  12663. * @returns {boolean} Returns `true` if `value` is a weak map, else `false`.
  12664. * @example
  12665. *
  12666. * _.isWeakMap(new WeakMap);
  12667. * // => true
  12668. *
  12669. * _.isWeakMap(new Map);
  12670. * // => false
  12671. */
  12672. function isWeakMap(value) {
  12673. return isObjectLike(value) && getTag(value) == weakMapTag;
  12674. }
  12675. /**
  12676. * Checks if `value` is classified as a `WeakSet` object.
  12677. *
  12678. * @static
  12679. * @memberOf _
  12680. * @since 4.3.0
  12681. * @category Lang
  12682. * @param {*} value The value to check.
  12683. * @returns {boolean} Returns `true` if `value` is a weak set, else `false`.
  12684. * @example
  12685. *
  12686. * _.isWeakSet(new WeakSet);
  12687. * // => true
  12688. *
  12689. * _.isWeakSet(new Set);
  12690. * // => false
  12691. */
  12692. function isWeakSet(value) {
  12693. return isObjectLike(value) && baseGetTag(value) == weakSetTag;
  12694. }
  12695. /**
  12696. * Checks if `value` is less than `other`.
  12697. *
  12698. * @static
  12699. * @memberOf _
  12700. * @since 3.9.0
  12701. * @category Lang
  12702. * @param {*} value The value to compare.
  12703. * @param {*} other The other value to compare.
  12704. * @returns {boolean} Returns `true` if `value` is less than `other`,
  12705. * else `false`.
  12706. * @see _.gt
  12707. * @example
  12708. *
  12709. * _.lt(1, 3);
  12710. * // => true
  12711. *
  12712. * _.lt(3, 3);
  12713. * // => false
  12714. *
  12715. * _.lt(3, 1);
  12716. * // => false
  12717. */
  12718. var lt = createRelationalOperation(baseLt);
  12719. /**
  12720. * Checks if `value` is less than or equal to `other`.
  12721. *
  12722. * @static
  12723. * @memberOf _
  12724. * @since 3.9.0
  12725. * @category Lang
  12726. * @param {*} value The value to compare.
  12727. * @param {*} other The other value to compare.
  12728. * @returns {boolean} Returns `true` if `value` is less than or equal to
  12729. * `other`, else `false`.
  12730. * @see _.gte
  12731. * @example
  12732. *
  12733. * _.lte(1, 3);
  12734. * // => true
  12735. *
  12736. * _.lte(3, 3);
  12737. * // => true
  12738. *
  12739. * _.lte(3, 1);
  12740. * // => false
  12741. */
  12742. var lte = createRelationalOperation(function(value, other) {
  12743. return value <= other;
  12744. });
  12745. /**
  12746. * Converts `value` to an array.
  12747. *
  12748. * @static
  12749. * @since 0.1.0
  12750. * @memberOf _
  12751. * @category Lang
  12752. * @param {*} value The value to convert.
  12753. * @returns {Array} Returns the converted array.
  12754. * @example
  12755. *
  12756. * _.toArray({ 'a': 1, 'b': 2 });
  12757. * // => [1, 2]
  12758. *
  12759. * _.toArray('abc');
  12760. * // => ['a', 'b', 'c']
  12761. *
  12762. * _.toArray(1);
  12763. * // => []
  12764. *
  12765. * _.toArray(null);
  12766. * // => []
  12767. */
  12768. function toArray(value) {
  12769. if (!value) {
  12770. return [];
  12771. }
  12772. if (isArrayLike(value)) {
  12773. return isString(value) ? stringToArray(value) : copyArray(value);
  12774. }
  12775. if (symIterator && value[symIterator]) {
  12776. return iteratorToArray(value[symIterator]());
  12777. }
  12778. var tag = getTag(value),
  12779. func = tag == mapTag ? mapToArray : (tag == setTag ? setToArray : values);
  12780. return func(value);
  12781. }
  12782. /**
  12783. * Converts `value` to a finite number.
  12784. *
  12785. * @static
  12786. * @memberOf _
  12787. * @since 4.12.0
  12788. * @category Lang
  12789. * @param {*} value The value to convert.
  12790. * @returns {number} Returns the converted number.
  12791. * @example
  12792. *
  12793. * _.toFinite(3.2);
  12794. * // => 3.2
  12795. *
  12796. * _.toFinite(Number.MIN_VALUE);
  12797. * // => 5e-324
  12798. *
  12799. * _.toFinite(Infinity);
  12800. * // => 1.7976931348623157e+308
  12801. *
  12802. * _.toFinite('3.2');
  12803. * // => 3.2
  12804. */
  12805. function toFinite(value) {
  12806. if (!value) {
  12807. return value === 0 ? value : 0;
  12808. }
  12809. value = toNumber(value);
  12810. if (value === INFINITY || value === -INFINITY) {
  12811. var sign = (value < 0 ? -1 : 1);
  12812. return sign * MAX_INTEGER;
  12813. }
  12814. return value === value ? value : 0;
  12815. }
  12816. /**
  12817. * Converts `value` to an integer.
  12818. *
  12819. * **Note:** This method is loosely based on
  12820. * [`ToInteger`](http://www.ecma-international.org/ecma-262/7.0/#sec-tointeger).
  12821. *
  12822. * @static
  12823. * @memberOf _
  12824. * @since 4.0.0
  12825. * @category Lang
  12826. * @param {*} value The value to convert.
  12827. * @returns {number} Returns the converted integer.
  12828. * @example
  12829. *
  12830. * _.toInteger(3.2);
  12831. * // => 3
  12832. *
  12833. * _.toInteger(Number.MIN_VALUE);
  12834. * // => 0
  12835. *
  12836. * _.toInteger(Infinity);
  12837. * // => 1.7976931348623157e+308
  12838. *
  12839. * _.toInteger('3.2');
  12840. * // => 3
  12841. */
  12842. function toInteger(value) {
  12843. var result = toFinite(value),
  12844. remainder = result % 1;
  12845. return result === result ? (remainder ? result - remainder : result) : 0;
  12846. }
  12847. /**
  12848. * Converts `value` to an integer suitable for use as the length of an
  12849. * array-like object.
  12850. *
  12851. * **Note:** This method is based on
  12852. * [`ToLength`](http://ecma-international.org/ecma-262/7.0/#sec-tolength).
  12853. *
  12854. * @static
  12855. * @memberOf _
  12856. * @since 4.0.0
  12857. * @category Lang
  12858. * @param {*} value The value to convert.
  12859. * @returns {number} Returns the converted integer.
  12860. * @example
  12861. *
  12862. * _.toLength(3.2);
  12863. * // => 3
  12864. *
  12865. * _.toLength(Number.MIN_VALUE);
  12866. * // => 0
  12867. *
  12868. * _.toLength(Infinity);
  12869. * // => 4294967295
  12870. *
  12871. * _.toLength('3.2');
  12872. * // => 3
  12873. */
  12874. function toLength(value) {
  12875. return value ? baseClamp(toInteger(value), 0, MAX_ARRAY_LENGTH) : 0;
  12876. }
  12877. /**
  12878. * Converts `value` to a number.
  12879. *
  12880. * @static
  12881. * @memberOf _
  12882. * @since 4.0.0
  12883. * @category Lang
  12884. * @param {*} value The value to process.
  12885. * @returns {number} Returns the number.
  12886. * @example
  12887. *
  12888. * _.toNumber(3.2);
  12889. * // => 3.2
  12890. *
  12891. * _.toNumber(Number.MIN_VALUE);
  12892. * // => 5e-324
  12893. *
  12894. * _.toNumber(Infinity);
  12895. * // => Infinity
  12896. *
  12897. * _.toNumber('3.2');
  12898. * // => 3.2
  12899. */
  12900. function toNumber(value) {
  12901. if (typeof value == 'number') {
  12902. return value;
  12903. }
  12904. if (isSymbol(value)) {
  12905. return NAN;
  12906. }
  12907. if (isObject(value)) {
  12908. var other = typeof value.valueOf == 'function' ? value.valueOf() : value;
  12909. value = isObject(other) ? (other + '') : other;
  12910. }
  12911. if (typeof value != 'string') {
  12912. return value === 0 ? value : +value;
  12913. }
  12914. value = value.replace(reTrim, '');
  12915. var isBinary = reIsBinary.test(value);
  12916. return (isBinary || reIsOctal.test(value))
  12917. ? freeParseInt(value.slice(2), isBinary ? 2 : 8)
  12918. : (reIsBadHex.test(value) ? NAN : +value);
  12919. }
  12920. /**
  12921. * Converts `value` to a plain object flattening inherited enumerable string
  12922. * keyed properties of `value` to own properties of the plain object.
  12923. *
  12924. * @static
  12925. * @memberOf _
  12926. * @since 3.0.0
  12927. * @category Lang
  12928. * @param {*} value The value to convert.
  12929. * @returns {Object} Returns the converted plain object.
  12930. * @example
  12931. *
  12932. * function Foo() {
  12933. * this.b = 2;
  12934. * }
  12935. *
  12936. * Foo.prototype.c = 3;
  12937. *
  12938. * _.assign({ 'a': 1 }, new Foo);
  12939. * // => { 'a': 1, 'b': 2 }
  12940. *
  12941. * _.assign({ 'a': 1 }, _.toPlainObject(new Foo));
  12942. * // => { 'a': 1, 'b': 2, 'c': 3 }
  12943. */
  12944. function toPlainObject(value) {
  12945. return copyObject(value, keysIn(value));
  12946. }
  12947. /**
  12948. * Converts `value` to a safe integer. A safe integer can be compared and
  12949. * represented correctly.
  12950. *
  12951. * @static
  12952. * @memberOf _
  12953. * @since 4.0.0
  12954. * @category Lang
  12955. * @param {*} value The value to convert.
  12956. * @returns {number} Returns the converted integer.
  12957. * @example
  12958. *
  12959. * _.toSafeInteger(3.2);
  12960. * // => 3
  12961. *
  12962. * _.toSafeInteger(Number.MIN_VALUE);
  12963. * // => 0
  12964. *
  12965. * _.toSafeInteger(Infinity);
  12966. * // => 9007199254740991
  12967. *
  12968. * _.toSafeInteger('3.2');
  12969. * // => 3
  12970. */
  12971. function toSafeInteger(value) {
  12972. return value
  12973. ? baseClamp(toInteger(value), -MAX_SAFE_INTEGER, MAX_SAFE_INTEGER)
  12974. : (value === 0 ? value : 0);
  12975. }
  12976. /**
  12977. * Converts `value` to a string. An empty string is returned for `null`
  12978. * and `undefined` values. The sign of `-0` is preserved.
  12979. *
  12980. * @static
  12981. * @memberOf _
  12982. * @since 4.0.0
  12983. * @category Lang
  12984. * @param {*} value The value to convert.
  12985. * @returns {string} Returns the converted string.
  12986. * @example
  12987. *
  12988. * _.toString(null);
  12989. * // => ''
  12990. *
  12991. * _.toString(-0);
  12992. * // => '-0'
  12993. *
  12994. * _.toString([1, 2, 3]);
  12995. * // => '1,2,3'
  12996. */
  12997. function toString(value) {
  12998. return value == null ? '' : baseToString(value);
  12999. }
  13000. /*------------------------------------------------------------------------*/
  13001. /**
  13002. * Assigns own enumerable string keyed properties of source objects to the
  13003. * destination object. Source objects are applied from left to right.
  13004. * Subsequent sources overwrite property assignments of previous sources.
  13005. *
  13006. * **Note:** This method mutates `object` and is loosely based on
  13007. * [`Object.assign`](https://mdn.io/Object/assign).
  13008. *
  13009. * @static
  13010. * @memberOf _
  13011. * @since 0.10.0
  13012. * @category Object
  13013. * @param {Object} object The destination object.
  13014. * @param {...Object} [sources] The source objects.
  13015. * @returns {Object} Returns `object`.
  13016. * @see _.assignIn
  13017. * @example
  13018. *
  13019. * function Foo() {
  13020. * this.a = 1;
  13021. * }
  13022. *
  13023. * function Bar() {
  13024. * this.c = 3;
  13025. * }
  13026. *
  13027. * Foo.prototype.b = 2;
  13028. * Bar.prototype.d = 4;
  13029. *
  13030. * _.assign({ 'a': 0 }, new Foo, new Bar);
  13031. * // => { 'a': 1, 'c': 3 }
  13032. */
  13033. var assign = createAssigner(function(object, source) {
  13034. if (isPrototype(source) || isArrayLike(source)) {
  13035. copyObject(source, keys(source), object);
  13036. return;
  13037. }
  13038. for (var key in source) {
  13039. if (hasOwnProperty.call(source, key)) {
  13040. assignValue(object, key, source[key]);
  13041. }
  13042. }
  13043. });
  13044. /**
  13045. * This method is like `_.assign` except that it iterates over own and
  13046. * inherited source properties.
  13047. *
  13048. * **Note:** This method mutates `object`.
  13049. *
  13050. * @static
  13051. * @memberOf _
  13052. * @since 4.0.0
  13053. * @alias extend
  13054. * @category Object
  13055. * @param {Object} object The destination object.
  13056. * @param {...Object} [sources] The source objects.
  13057. * @returns {Object} Returns `object`.
  13058. * @see _.assign
  13059. * @example
  13060. *
  13061. * function Foo() {
  13062. * this.a = 1;
  13063. * }
  13064. *
  13065. * function Bar() {
  13066. * this.c = 3;
  13067. * }
  13068. *
  13069. * Foo.prototype.b = 2;
  13070. * Bar.prototype.d = 4;
  13071. *
  13072. * _.assignIn({ 'a': 0 }, new Foo, new Bar);
  13073. * // => { 'a': 1, 'b': 2, 'c': 3, 'd': 4 }
  13074. */
  13075. var assignIn = createAssigner(function(object, source) {
  13076. copyObject(source, keysIn(source), object);
  13077. });
  13078. /**
  13079. * This method is like `_.assignIn` except that it accepts `customizer`
  13080. * which is invoked to produce the assigned values. If `customizer` returns
  13081. * `undefined`, assignment is handled by the method instead. The `customizer`
  13082. * is invoked with five arguments: (objValue, srcValue, key, object, source).
  13083. *
  13084. * **Note:** This method mutates `object`.
  13085. *
  13086. * @static
  13087. * @memberOf _
  13088. * @since 4.0.0
  13089. * @alias extendWith
  13090. * @category Object
  13091. * @param {Object} object The destination object.
  13092. * @param {...Object} sources The source objects.
  13093. * @param {Function} [customizer] The function to customize assigned values.
  13094. * @returns {Object} Returns `object`.
  13095. * @see _.assignWith
  13096. * @example
  13097. *
  13098. * function customizer(objValue, srcValue) {
  13099. * return _.isUndefined(objValue) ? srcValue : objValue;
  13100. * }
  13101. *
  13102. * var defaults = _.partialRight(_.assignInWith, customizer);
  13103. *
  13104. * defaults({ 'a': 1 }, { 'b': 2 }, { 'a': 3 });
  13105. * // => { 'a': 1, 'b': 2 }
  13106. */
  13107. var assignInWith = createAssigner(function(object, source, srcIndex, customizer) {
  13108. copyObject(source, keysIn(source), object, customizer);
  13109. });
  13110. /**
  13111. * This method is like `_.assign` except that it accepts `customizer`
  13112. * which is invoked to produce the assigned values. If `customizer` returns
  13113. * `undefined`, assignment is handled by the method instead. The `customizer`
  13114. * is invoked with five arguments: (objValue, srcValue, key, object, source).
  13115. *
  13116. * **Note:** This method mutates `object`.
  13117. *
  13118. * @static
  13119. * @memberOf _
  13120. * @since 4.0.0
  13121. * @category Object
  13122. * @param {Object} object The destination object.
  13123. * @param {...Object} sources The source objects.
  13124. * @param {Function} [customizer] The function to customize assigned values.
  13125. * @returns {Object} Returns `object`.
  13126. * @see _.assignInWith
  13127. * @example
  13128. *
  13129. * function customizer(objValue, srcValue) {
  13130. * return _.isUndefined(objValue) ? srcValue : objValue;
  13131. * }
  13132. *
  13133. * var defaults = _.partialRight(_.assignWith, customizer);
  13134. *
  13135. * defaults({ 'a': 1 }, { 'b': 2 }, { 'a': 3 });
  13136. * // => { 'a': 1, 'b': 2 }
  13137. */
  13138. var assignWith = createAssigner(function(object, source, srcIndex, customizer) {
  13139. copyObject(source, keys(source), object, customizer);
  13140. });
  13141. /**
  13142. * Creates an array of values corresponding to `paths` of `object`.
  13143. *
  13144. * @static
  13145. * @memberOf _
  13146. * @since 1.0.0
  13147. * @category Object
  13148. * @param {Object} object The object to iterate over.
  13149. * @param {...(string|string[])} [paths] The property paths to pick.
  13150. * @returns {Array} Returns the picked values.
  13151. * @example
  13152. *
  13153. * var object = { 'a': [{ 'b': { 'c': 3 } }, 4] };
  13154. *
  13155. * _.at(object, ['a[0].b.c', 'a[1]']);
  13156. * // => [3, 4]
  13157. */
  13158. var at = flatRest(baseAt);
  13159. /**
  13160. * Creates an object that inherits from the `prototype` object. If a
  13161. * `properties` object is given, its own enumerable string keyed properties
  13162. * are assigned to the created object.
  13163. *
  13164. * @static
  13165. * @memberOf _
  13166. * @since 2.3.0
  13167. * @category Object
  13168. * @param {Object} prototype The object to inherit from.
  13169. * @param {Object} [properties] The properties to assign to the object.
  13170. * @returns {Object} Returns the new object.
  13171. * @example
  13172. *
  13173. * function Shape() {
  13174. * this.x = 0;
  13175. * this.y = 0;
  13176. * }
  13177. *
  13178. * function Circle() {
  13179. * Shape.call(this);
  13180. * }
  13181. *
  13182. * Circle.prototype = _.create(Shape.prototype, {
  13183. * 'constructor': Circle
  13184. * });
  13185. *
  13186. * var circle = new Circle;
  13187. * circle instanceof Circle;
  13188. * // => true
  13189. *
  13190. * circle instanceof Shape;
  13191. * // => true
  13192. */
  13193. function create(prototype, properties) {
  13194. var result = baseCreate(prototype);
  13195. return properties == null ? result : baseAssign(result, properties);
  13196. }
  13197. /**
  13198. * Assigns own and inherited enumerable string keyed properties of source
  13199. * objects to the destination object for all destination properties that
  13200. * resolve to `undefined`. Source objects are applied from left to right.
  13201. * Once a property is set, additional values of the same property are ignored.
  13202. *
  13203. * **Note:** This method mutates `object`.
  13204. *
  13205. * @static
  13206. * @since 0.1.0
  13207. * @memberOf _
  13208. * @category Object
  13209. * @param {Object} object The destination object.
  13210. * @param {...Object} [sources] The source objects.
  13211. * @returns {Object} Returns `object`.
  13212. * @see _.defaultsDeep
  13213. * @example
  13214. *
  13215. * _.defaults({ 'a': 1 }, { 'b': 2 }, { 'a': 3 });
  13216. * // => { 'a': 1, 'b': 2 }
  13217. */
  13218. var defaults = baseRest(function(object, sources) {
  13219. object = Object(object);
  13220. var index = -1;
  13221. var length = sources.length;
  13222. var guard = length > 2 ? sources[2] : undefined;
  13223. if (guard && isIterateeCall(sources[0], sources[1], guard)) {
  13224. length = 1;
  13225. }
  13226. while (++index < length) {
  13227. var source = sources[index];
  13228. var props = keysIn(source);
  13229. var propsIndex = -1;
  13230. var propsLength = props.length;
  13231. while (++propsIndex < propsLength) {
  13232. var key = props[propsIndex];
  13233. var value = object[key];
  13234. if (value === undefined ||
  13235. (eq(value, objectProto[key]) && !hasOwnProperty.call(object, key))) {
  13236. object[key] = source[key];
  13237. }
  13238. }
  13239. }
  13240. return object;
  13241. });
  13242. /**
  13243. * This method is like `_.defaults` except that it recursively assigns
  13244. * default properties.
  13245. *
  13246. * **Note:** This method mutates `object`.
  13247. *
  13248. * @static
  13249. * @memberOf _
  13250. * @since 3.10.0
  13251. * @category Object
  13252. * @param {Object} object The destination object.
  13253. * @param {...Object} [sources] The source objects.
  13254. * @returns {Object} Returns `object`.
  13255. * @see _.defaults
  13256. * @example
  13257. *
  13258. * _.defaultsDeep({ 'a': { 'b': 2 } }, { 'a': { 'b': 1, 'c': 3 } });
  13259. * // => { 'a': { 'b': 2, 'c': 3 } }
  13260. */
  13261. var defaultsDeep = baseRest(function(args) {
  13262. args.push(undefined, customDefaultsMerge);
  13263. return apply(mergeWith, undefined, args);
  13264. });
  13265. /**
  13266. * This method is like `_.find` except that it returns the key of the first
  13267. * element `predicate` returns truthy for instead of the element itself.
  13268. *
  13269. * @static
  13270. * @memberOf _
  13271. * @since 1.1.0
  13272. * @category Object
  13273. * @param {Object} object The object to inspect.
  13274. * @param {Function} [predicate=_.identity] The function invoked per iteration.
  13275. * @returns {string|undefined} Returns the key of the matched element,
  13276. * else `undefined`.
  13277. * @example
  13278. *
  13279. * var users = {
  13280. * 'barney': { 'age': 36, 'active': true },
  13281. * 'fred': { 'age': 40, 'active': false },
  13282. * 'pebbles': { 'age': 1, 'active': true }
  13283. * };
  13284. *
  13285. * _.findKey(users, function(o) { return o.age < 40; });
  13286. * // => 'barney' (iteration order is not guaranteed)
  13287. *
  13288. * // The `_.matches` iteratee shorthand.
  13289. * _.findKey(users, { 'age': 1, 'active': true });
  13290. * // => 'pebbles'
  13291. *
  13292. * // The `_.matchesProperty` iteratee shorthand.
  13293. * _.findKey(users, ['active', false]);
  13294. * // => 'fred'
  13295. *
  13296. * // The `_.property` iteratee shorthand.
  13297. * _.findKey(users, 'active');
  13298. * // => 'barney'
  13299. */
  13300. function findKey(object, predicate) {
  13301. return baseFindKey(object, getIteratee(predicate, 3), baseForOwn);
  13302. }
  13303. /**
  13304. * This method is like `_.findKey` except that it iterates over elements of
  13305. * a collection in the opposite order.
  13306. *
  13307. * @static
  13308. * @memberOf _
  13309. * @since 2.0.0
  13310. * @category Object
  13311. * @param {Object} object The object to inspect.
  13312. * @param {Function} [predicate=_.identity] The function invoked per iteration.
  13313. * @returns {string|undefined} Returns the key of the matched element,
  13314. * else `undefined`.
  13315. * @example
  13316. *
  13317. * var users = {
  13318. * 'barney': { 'age': 36, 'active': true },
  13319. * 'fred': { 'age': 40, 'active': false },
  13320. * 'pebbles': { 'age': 1, 'active': true }
  13321. * };
  13322. *
  13323. * _.findLastKey(users, function(o) { return o.age < 40; });
  13324. * // => returns 'pebbles' assuming `_.findKey` returns 'barney'
  13325. *
  13326. * // The `_.matches` iteratee shorthand.
  13327. * _.findLastKey(users, { 'age': 36, 'active': true });
  13328. * // => 'barney'
  13329. *
  13330. * // The `_.matchesProperty` iteratee shorthand.
  13331. * _.findLastKey(users, ['active', false]);
  13332. * // => 'fred'
  13333. *
  13334. * // The `_.property` iteratee shorthand.
  13335. * _.findLastKey(users, 'active');
  13336. * // => 'pebbles'
  13337. */
  13338. function findLastKey(object, predicate) {
  13339. return baseFindKey(object, getIteratee(predicate, 3), baseForOwnRight);
  13340. }
  13341. /**
  13342. * Iterates over own and inherited enumerable string keyed properties of an
  13343. * object and invokes `iteratee` for each property. The iteratee is invoked
  13344. * with three arguments: (value, key, object). Iteratee functions may exit
  13345. * iteration early by explicitly returning `false`.
  13346. *
  13347. * @static
  13348. * @memberOf _
  13349. * @since 0.3.0
  13350. * @category Object
  13351. * @param {Object} object The object to iterate over.
  13352. * @param {Function} [iteratee=_.identity] The function invoked per iteration.
  13353. * @returns {Object} Returns `object`.
  13354. * @see _.forInRight
  13355. * @example
  13356. *
  13357. * function Foo() {
  13358. * this.a = 1;
  13359. * this.b = 2;
  13360. * }
  13361. *
  13362. * Foo.prototype.c = 3;
  13363. *
  13364. * _.forIn(new Foo, function(value, key) {
  13365. * console.log(key);
  13366. * });
  13367. * // => Logs 'a', 'b', then 'c' (iteration order is not guaranteed).
  13368. */
  13369. function forIn(object, iteratee) {
  13370. return object == null
  13371. ? object
  13372. : baseFor(object, getIteratee(iteratee, 3), keysIn);
  13373. }
  13374. /**
  13375. * This method is like `_.forIn` except that it iterates over properties of
  13376. * `object` in the opposite order.
  13377. *
  13378. * @static
  13379. * @memberOf _
  13380. * @since 2.0.0
  13381. * @category Object
  13382. * @param {Object} object The object to iterate over.
  13383. * @param {Function} [iteratee=_.identity] The function invoked per iteration.
  13384. * @returns {Object} Returns `object`.
  13385. * @see _.forIn
  13386. * @example
  13387. *
  13388. * function Foo() {
  13389. * this.a = 1;
  13390. * this.b = 2;
  13391. * }
  13392. *
  13393. * Foo.prototype.c = 3;
  13394. *
  13395. * _.forInRight(new Foo, function(value, key) {
  13396. * console.log(key);
  13397. * });
  13398. * // => Logs 'c', 'b', then 'a' assuming `_.forIn` logs 'a', 'b', then 'c'.
  13399. */
  13400. function forInRight(object, iteratee) {
  13401. return object == null
  13402. ? object
  13403. : baseForRight(object, getIteratee(iteratee, 3), keysIn);
  13404. }
  13405. /**
  13406. * Iterates over own enumerable string keyed properties of an object and
  13407. * invokes `iteratee` for each property. The iteratee is invoked with three
  13408. * arguments: (value, key, object). Iteratee functions may exit iteration
  13409. * early by explicitly returning `false`.
  13410. *
  13411. * @static
  13412. * @memberOf _
  13413. * @since 0.3.0
  13414. * @category Object
  13415. * @param {Object} object The object to iterate over.
  13416. * @param {Function} [iteratee=_.identity] The function invoked per iteration.
  13417. * @returns {Object} Returns `object`.
  13418. * @see _.forOwnRight
  13419. * @example
  13420. *
  13421. * function Foo() {
  13422. * this.a = 1;
  13423. * this.b = 2;
  13424. * }
  13425. *
  13426. * Foo.prototype.c = 3;
  13427. *
  13428. * _.forOwn(new Foo, function(value, key) {
  13429. * console.log(key);
  13430. * });
  13431. * // => Logs 'a' then 'b' (iteration order is not guaranteed).
  13432. */
  13433. function forOwn(object, iteratee) {
  13434. return object && baseForOwn(object, getIteratee(iteratee, 3));
  13435. }
  13436. /**
  13437. * This method is like `_.forOwn` except that it iterates over properties of
  13438. * `object` in the opposite order.
  13439. *
  13440. * @static
  13441. * @memberOf _
  13442. * @since 2.0.0
  13443. * @category Object
  13444. * @param {Object} object The object to iterate over.
  13445. * @param {Function} [iteratee=_.identity] The function invoked per iteration.
  13446. * @returns {Object} Returns `object`.
  13447. * @see _.forOwn
  13448. * @example
  13449. *
  13450. * function Foo() {
  13451. * this.a = 1;
  13452. * this.b = 2;
  13453. * }
  13454. *
  13455. * Foo.prototype.c = 3;
  13456. *
  13457. * _.forOwnRight(new Foo, function(value, key) {
  13458. * console.log(key);
  13459. * });
  13460. * // => Logs 'b' then 'a' assuming `_.forOwn` logs 'a' then 'b'.
  13461. */
  13462. function forOwnRight(object, iteratee) {
  13463. return object && baseForOwnRight(object, getIteratee(iteratee, 3));
  13464. }
  13465. /**
  13466. * Creates an array of function property names from own enumerable properties
  13467. * of `object`.
  13468. *
  13469. * @static
  13470. * @since 0.1.0
  13471. * @memberOf _
  13472. * @category Object
  13473. * @param {Object} object The object to inspect.
  13474. * @returns {Array} Returns the function names.
  13475. * @see _.functionsIn
  13476. * @example
  13477. *
  13478. * function Foo() {
  13479. * this.a = _.constant('a');
  13480. * this.b = _.constant('b');
  13481. * }
  13482. *
  13483. * Foo.prototype.c = _.constant('c');
  13484. *
  13485. * _.functions(new Foo);
  13486. * // => ['a', 'b']
  13487. */
  13488. function functions(object) {
  13489. return object == null ? [] : baseFunctions(object, keys(object));
  13490. }
  13491. /**
  13492. * Creates an array of function property names from own and inherited
  13493. * enumerable properties of `object`.
  13494. *
  13495. * @static
  13496. * @memberOf _
  13497. * @since 4.0.0
  13498. * @category Object
  13499. * @param {Object} object The object to inspect.
  13500. * @returns {Array} Returns the function names.
  13501. * @see _.functions
  13502. * @example
  13503. *
  13504. * function Foo() {
  13505. * this.a = _.constant('a');
  13506. * this.b = _.constant('b');
  13507. * }
  13508. *
  13509. * Foo.prototype.c = _.constant('c');
  13510. *
  13511. * _.functionsIn(new Foo);
  13512. * // => ['a', 'b', 'c']
  13513. */
  13514. function functionsIn(object) {
  13515. return object == null ? [] : baseFunctions(object, keysIn(object));
  13516. }
  13517. /**
  13518. * Gets the value at `path` of `object`. If the resolved value is
  13519. * `undefined`, the `defaultValue` is returned in its place.
  13520. *
  13521. * @static
  13522. * @memberOf _
  13523. * @since 3.7.0
  13524. * @category Object
  13525. * @param {Object} object The object to query.
  13526. * @param {Array|string} path The path of the property to get.
  13527. * @param {*} [defaultValue] The value returned for `undefined` resolved values.
  13528. * @returns {*} Returns the resolved value.
  13529. * @example
  13530. *
  13531. * var object = { 'a': [{ 'b': { 'c': 3 } }] };
  13532. *
  13533. * _.get(object, 'a[0].b.c');
  13534. * // => 3
  13535. *
  13536. * _.get(object, ['a', '0', 'b', 'c']);
  13537. * // => 3
  13538. *
  13539. * _.get(object, 'a.b.c', 'default');
  13540. * // => 'default'
  13541. */
  13542. function get(object, path, defaultValue) {
  13543. var result = object == null ? undefined : baseGet(object, path);
  13544. return result === undefined ? defaultValue : result;
  13545. }
  13546. /**
  13547. * Checks if `path` is a direct property of `object`.
  13548. *
  13549. * @static
  13550. * @since 0.1.0
  13551. * @memberOf _
  13552. * @category Object
  13553. * @param {Object} object The object to query.
  13554. * @param {Array|string} path The path to check.
  13555. * @returns {boolean} Returns `true` if `path` exists, else `false`.
  13556. * @example
  13557. *
  13558. * var object = { 'a': { 'b': 2 } };
  13559. * var other = _.create({ 'a': _.create({ 'b': 2 }) });
  13560. *
  13561. * _.has(object, 'a');
  13562. * // => true
  13563. *
  13564. * _.has(object, 'a.b');
  13565. * // => true
  13566. *
  13567. * _.has(object, ['a', 'b']);
  13568. * // => true
  13569. *
  13570. * _.has(other, 'a');
  13571. * // => false
  13572. */
  13573. function has(object, path) {
  13574. return object != null && hasPath(object, path, baseHas);
  13575. }
  13576. /**
  13577. * Checks if `path` is a direct or inherited property of `object`.
  13578. *
  13579. * @static
  13580. * @memberOf _
  13581. * @since 4.0.0
  13582. * @category Object
  13583. * @param {Object} object The object to query.
  13584. * @param {Array|string} path The path to check.
  13585. * @returns {boolean} Returns `true` if `path` exists, else `false`.
  13586. * @example
  13587. *
  13588. * var object = _.create({ 'a': _.create({ 'b': 2 }) });
  13589. *
  13590. * _.hasIn(object, 'a');
  13591. * // => true
  13592. *
  13593. * _.hasIn(object, 'a.b');
  13594. * // => true
  13595. *
  13596. * _.hasIn(object, ['a', 'b']);
  13597. * // => true
  13598. *
  13599. * _.hasIn(object, 'b');
  13600. * // => false
  13601. */
  13602. function hasIn(object, path) {
  13603. return object != null && hasPath(object, path, baseHasIn);
  13604. }
  13605. /**
  13606. * Creates an object composed of the inverted keys and values of `object`.
  13607. * If `object` contains duplicate values, subsequent values overwrite
  13608. * property assignments of previous values.
  13609. *
  13610. * @static
  13611. * @memberOf _
  13612. * @since 0.7.0
  13613. * @category Object
  13614. * @param {Object} object The object to invert.
  13615. * @returns {Object} Returns the new inverted object.
  13616. * @example
  13617. *
  13618. * var object = { 'a': 1, 'b': 2, 'c': 1 };
  13619. *
  13620. * _.invert(object);
  13621. * // => { '1': 'c', '2': 'b' }
  13622. */
  13623. var invert = createInverter(function(result, value, key) {
  13624. if (value != null &&
  13625. typeof value.toString != 'function') {
  13626. value = nativeObjectToString.call(value);
  13627. }
  13628. result[value] = key;
  13629. }, constant(identity));
  13630. /**
  13631. * This method is like `_.invert` except that the inverted object is generated
  13632. * from the results of running each element of `object` thru `iteratee`. The
  13633. * corresponding inverted value of each inverted key is an array of keys
  13634. * responsible for generating the inverted value. The iteratee is invoked
  13635. * with one argument: (value).
  13636. *
  13637. * @static
  13638. * @memberOf _
  13639. * @since 4.1.0
  13640. * @category Object
  13641. * @param {Object} object The object to invert.
  13642. * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
  13643. * @returns {Object} Returns the new inverted object.
  13644. * @example
  13645. *
  13646. * var object = { 'a': 1, 'b': 2, 'c': 1 };
  13647. *
  13648. * _.invertBy(object);
  13649. * // => { '1': ['a', 'c'], '2': ['b'] }
  13650. *
  13651. * _.invertBy(object, function(value) {
  13652. * return 'group' + value;
  13653. * });
  13654. * // => { 'group1': ['a', 'c'], 'group2': ['b'] }
  13655. */
  13656. var invertBy = createInverter(function(result, value, key) {
  13657. if (value != null &&
  13658. typeof value.toString != 'function') {
  13659. value = nativeObjectToString.call(value);
  13660. }
  13661. if (hasOwnProperty.call(result, value)) {
  13662. result[value].push(key);
  13663. } else {
  13664. result[value] = [key];
  13665. }
  13666. }, getIteratee);
  13667. /**
  13668. * Invokes the method at `path` of `object`.
  13669. *
  13670. * @static
  13671. * @memberOf _
  13672. * @since 4.0.0
  13673. * @category Object
  13674. * @param {Object} object The object to query.
  13675. * @param {Array|string} path The path of the method to invoke.
  13676. * @param {...*} [args] The arguments to invoke the method with.
  13677. * @returns {*} Returns the result of the invoked method.
  13678. * @example
  13679. *
  13680. * var object = { 'a': [{ 'b': { 'c': [1, 2, 3, 4] } }] };
  13681. *
  13682. * _.invoke(object, 'a[0].b.c.slice', 1, 3);
  13683. * // => [2, 3]
  13684. */
  13685. var invoke = baseRest(baseInvoke);
  13686. /**
  13687. * Creates an array of the own enumerable property names of `object`.
  13688. *
  13689. * **Note:** Non-object values are coerced to objects. See the
  13690. * [ES spec](http://ecma-international.org/ecma-262/7.0/#sec-object.keys)
  13691. * for more details.
  13692. *
  13693. * @static
  13694. * @since 0.1.0
  13695. * @memberOf _
  13696. * @category Object
  13697. * @param {Object} object The object to query.
  13698. * @returns {Array} Returns the array of property names.
  13699. * @example
  13700. *
  13701. * function Foo() {
  13702. * this.a = 1;
  13703. * this.b = 2;
  13704. * }
  13705. *
  13706. * Foo.prototype.c = 3;
  13707. *
  13708. * _.keys(new Foo);
  13709. * // => ['a', 'b'] (iteration order is not guaranteed)
  13710. *
  13711. * _.keys('hi');
  13712. * // => ['0', '1']
  13713. */
  13714. function keys(object) {
  13715. return isArrayLike(object) ? arrayLikeKeys(object) : baseKeys(object);
  13716. }
  13717. /**
  13718. * Creates an array of the own and inherited enumerable property names of `object`.
  13719. *
  13720. * **Note:** Non-object values are coerced to objects.
  13721. *
  13722. * @static
  13723. * @memberOf _
  13724. * @since 3.0.0
  13725. * @category Object
  13726. * @param {Object} object The object to query.
  13727. * @returns {Array} Returns the array of property names.
  13728. * @example
  13729. *
  13730. * function Foo() {
  13731. * this.a = 1;
  13732. * this.b = 2;
  13733. * }
  13734. *
  13735. * Foo.prototype.c = 3;
  13736. *
  13737. * _.keysIn(new Foo);
  13738. * // => ['a', 'b', 'c'] (iteration order is not guaranteed)
  13739. */
  13740. function keysIn(object) {
  13741. return isArrayLike(object) ? arrayLikeKeys(object, true) : baseKeysIn(object);
  13742. }
  13743. /**
  13744. * The opposite of `_.mapValues`; this method creates an object with the
  13745. * same values as `object` and keys generated by running each own enumerable
  13746. * string keyed property of `object` thru `iteratee`. The iteratee is invoked
  13747. * with three arguments: (value, key, object).
  13748. *
  13749. * @static
  13750. * @memberOf _
  13751. * @since 3.8.0
  13752. * @category Object
  13753. * @param {Object} object The object to iterate over.
  13754. * @param {Function} [iteratee=_.identity] The function invoked per iteration.
  13755. * @returns {Object} Returns the new mapped object.
  13756. * @see _.mapValues
  13757. * @example
  13758. *
  13759. * _.mapKeys({ 'a': 1, 'b': 2 }, function(value, key) {
  13760. * return key + value;
  13761. * });
  13762. * // => { 'a1': 1, 'b2': 2 }
  13763. */
  13764. function mapKeys(object, iteratee) {
  13765. var result = {};
  13766. iteratee = getIteratee(iteratee, 3);
  13767. baseForOwn(object, function(value, key, object) {
  13768. baseAssignValue(result, iteratee(value, key, object), value);
  13769. });
  13770. return result;
  13771. }
  13772. /**
  13773. * Creates an object with the same keys as `object` and values generated
  13774. * by running each own enumerable string keyed property of `object` thru
  13775. * `iteratee`. The iteratee is invoked with three arguments:
  13776. * (value, key, object).
  13777. *
  13778. * @static
  13779. * @memberOf _
  13780. * @since 2.4.0
  13781. * @category Object
  13782. * @param {Object} object The object to iterate over.
  13783. * @param {Function} [iteratee=_.identity] The function invoked per iteration.
  13784. * @returns {Object} Returns the new mapped object.
  13785. * @see _.mapKeys
  13786. * @example
  13787. *
  13788. * var users = {
  13789. * 'fred': { 'user': 'fred', 'age': 40 },
  13790. * 'pebbles': { 'user': 'pebbles', 'age': 1 }
  13791. * };
  13792. *
  13793. * _.mapValues(users, function(o) { return o.age; });
  13794. * // => { 'fred': 40, 'pebbles': 1 } (iteration order is not guaranteed)
  13795. *
  13796. * // The `_.property` iteratee shorthand.
  13797. * _.mapValues(users, 'age');
  13798. * // => { 'fred': 40, 'pebbles': 1 } (iteration order is not guaranteed)
  13799. */
  13800. function mapValues(object, iteratee) {
  13801. var result = {};
  13802. iteratee = getIteratee(iteratee, 3);
  13803. baseForOwn(object, function(value, key, object) {
  13804. baseAssignValue(result, key, iteratee(value, key, object));
  13805. });
  13806. return result;
  13807. }
  13808. /**
  13809. * This method is like `_.assign` except that it recursively merges own and
  13810. * inherited enumerable string keyed properties of source objects into the
  13811. * destination object. Source properties that resolve to `undefined` are
  13812. * skipped if a destination value exists. Array and plain object properties
  13813. * are merged recursively. Other objects and value types are overridden by
  13814. * assignment. Source objects are applied from left to right. Subsequent
  13815. * sources overwrite property assignments of previous sources.
  13816. *
  13817. * **Note:** This method mutates `object`.
  13818. *
  13819. * @static
  13820. * @memberOf _
  13821. * @since 0.5.0
  13822. * @category Object
  13823. * @param {Object} object The destination object.
  13824. * @param {...Object} [sources] The source objects.
  13825. * @returns {Object} Returns `object`.
  13826. * @example
  13827. *
  13828. * var object = {
  13829. * 'a': [{ 'b': 2 }, { 'd': 4 }]
  13830. * };
  13831. *
  13832. * var other = {
  13833. * 'a': [{ 'c': 3 }, { 'e': 5 }]
  13834. * };
  13835. *
  13836. * _.merge(object, other);
  13837. * // => { 'a': [{ 'b': 2, 'c': 3 }, { 'd': 4, 'e': 5 }] }
  13838. */
  13839. var merge = createAssigner(function(object, source, srcIndex) {
  13840. baseMerge(object, source, srcIndex);
  13841. });
  13842. /**
  13843. * This method is like `_.merge` except that it accepts `customizer` which
  13844. * is invoked to produce the merged values of the destination and source
  13845. * properties. If `customizer` returns `undefined`, merging is handled by the
  13846. * method instead. The `customizer` is invoked with six arguments:
  13847. * (objValue, srcValue, key, object, source, stack).
  13848. *
  13849. * **Note:** This method mutates `object`.
  13850. *
  13851. * @static
  13852. * @memberOf _
  13853. * @since 4.0.0
  13854. * @category Object
  13855. * @param {Object} object The destination object.
  13856. * @param {...Object} sources The source objects.
  13857. * @param {Function} customizer The function to customize assigned values.
  13858. * @returns {Object} Returns `object`.
  13859. * @example
  13860. *
  13861. * function customizer(objValue, srcValue) {
  13862. * if (_.isArray(objValue)) {
  13863. * return objValue.concat(srcValue);
  13864. * }
  13865. * }
  13866. *
  13867. * var object = { 'a': [1], 'b': [2] };
  13868. * var other = { 'a': [3], 'b': [4] };
  13869. *
  13870. * _.mergeWith(object, other, customizer);
  13871. * // => { 'a': [1, 3], 'b': [2, 4] }
  13872. */
  13873. var mergeWith = createAssigner(function(object, source, srcIndex, customizer) {
  13874. baseMerge(object, source, srcIndex, customizer);
  13875. });
  13876. /**
  13877. * The opposite of `_.pick`; this method creates an object composed of the
  13878. * own and inherited enumerable property paths of `object` that are not omitted.
  13879. *
  13880. * **Note:** This method is considerably slower than `_.pick`.
  13881. *
  13882. * @static
  13883. * @since 0.1.0
  13884. * @memberOf _
  13885. * @category Object
  13886. * @param {Object} object The source object.
  13887. * @param {...(string|string[])} [paths] The property paths to omit.
  13888. * @returns {Object} Returns the new object.
  13889. * @example
  13890. *
  13891. * var object = { 'a': 1, 'b': '2', 'c': 3 };
  13892. *
  13893. * _.omit(object, ['a', 'c']);
  13894. * // => { 'b': '2' }
  13895. */
  13896. var omit = flatRest(function(object, paths) {
  13897. var result = {};
  13898. if (object == null) {
  13899. return result;
  13900. }
  13901. var isDeep = false;
  13902. paths = arrayMap(paths, function(path) {
  13903. path = castPath(path, object);
  13904. isDeep || (isDeep = path.length > 1);
  13905. return path;
  13906. });
  13907. copyObject(object, getAllKeysIn(object), result);
  13908. if (isDeep) {
  13909. result = baseClone(result, CLONE_DEEP_FLAG | CLONE_FLAT_FLAG | CLONE_SYMBOLS_FLAG, customOmitClone);
  13910. }
  13911. var length = paths.length;
  13912. while (length--) {
  13913. baseUnset(result, paths[length]);
  13914. }
  13915. return result;
  13916. });
  13917. /**
  13918. * The opposite of `_.pickBy`; this method creates an object composed of
  13919. * the own and inherited enumerable string keyed properties of `object` that
  13920. * `predicate` doesn't return truthy for. The predicate is invoked with two
  13921. * arguments: (value, key).
  13922. *
  13923. * @static
  13924. * @memberOf _
  13925. * @since 4.0.0
  13926. * @category Object
  13927. * @param {Object} object The source object.
  13928. * @param {Function} [predicate=_.identity] The function invoked per property.
  13929. * @returns {Object} Returns the new object.
  13930. * @example
  13931. *
  13932. * var object = { 'a': 1, 'b': '2', 'c': 3 };
  13933. *
  13934. * _.omitBy(object, _.isNumber);
  13935. * // => { 'b': '2' }
  13936. */
  13937. function omitBy(object, predicate) {
  13938. return pickBy(object, negate(getIteratee(predicate)));
  13939. }
  13940. /**
  13941. * Creates an object composed of the picked `object` properties.
  13942. *
  13943. * @static
  13944. * @since 0.1.0
  13945. * @memberOf _
  13946. * @category Object
  13947. * @param {Object} object The source object.
  13948. * @param {...(string|string[])} [paths] The property paths to pick.
  13949. * @returns {Object} Returns the new object.
  13950. * @example
  13951. *
  13952. * var object = { 'a': 1, 'b': '2', 'c': 3 };
  13953. *
  13954. * _.pick(object, ['a', 'c']);
  13955. * // => { 'a': 1, 'c': 3 }
  13956. */
  13957. var pick = flatRest(function(object, paths) {
  13958. return object == null ? {} : basePick(object, paths);
  13959. });
  13960. /**
  13961. * Creates an object composed of the `object` properties `predicate` returns
  13962. * truthy for. The predicate is invoked with two arguments: (value, key).
  13963. *
  13964. * @static
  13965. * @memberOf _
  13966. * @since 4.0.0
  13967. * @category Object
  13968. * @param {Object} object The source object.
  13969. * @param {Function} [predicate=_.identity] The function invoked per property.
  13970. * @returns {Object} Returns the new object.
  13971. * @example
  13972. *
  13973. * var object = { 'a': 1, 'b': '2', 'c': 3 };
  13974. *
  13975. * _.pickBy(object, _.isNumber);
  13976. * // => { 'a': 1, 'c': 3 }
  13977. */
  13978. function pickBy(object, predicate) {
  13979. if (object == null) {
  13980. return {};
  13981. }
  13982. var props = arrayMap(getAllKeysIn(object), function(prop) {
  13983. return [prop];
  13984. });
  13985. predicate = getIteratee(predicate);
  13986. return basePickBy(object, props, function(value, path) {
  13987. return predicate(value, path[0]);
  13988. });
  13989. }
  13990. /**
  13991. * This method is like `_.get` except that if the resolved value is a
  13992. * function it's invoked with the `this` binding of its parent object and
  13993. * its result is returned.
  13994. *
  13995. * @static
  13996. * @since 0.1.0
  13997. * @memberOf _
  13998. * @category Object
  13999. * @param {Object} object The object to query.
  14000. * @param {Array|string} path The path of the property to resolve.
  14001. * @param {*} [defaultValue] The value returned for `undefined` resolved values.
  14002. * @returns {*} Returns the resolved value.
  14003. * @example
  14004. *
  14005. * var object = { 'a': [{ 'b': { 'c1': 3, 'c2': _.constant(4) } }] };
  14006. *
  14007. * _.result(object, 'a[0].b.c1');
  14008. * // => 3
  14009. *
  14010. * _.result(object, 'a[0].b.c2');
  14011. * // => 4
  14012. *
  14013. * _.result(object, 'a[0].b.c3', 'default');
  14014. * // => 'default'
  14015. *
  14016. * _.result(object, 'a[0].b.c3', _.constant('default'));
  14017. * // => 'default'
  14018. */
  14019. function result(object, path, defaultValue) {
  14020. path = castPath(path, object);
  14021. var index = -1,
  14022. length = path.length;
  14023. // Ensure the loop is entered when path is empty.
  14024. if (!length) {
  14025. length = 1;
  14026. object = undefined;
  14027. }
  14028. while (++index < length) {
  14029. var value = object == null ? undefined : object[toKey(path[index])];
  14030. if (value === undefined) {
  14031. index = length;
  14032. value = defaultValue;
  14033. }
  14034. object = isFunction(value) ? value.call(object) : value;
  14035. }
  14036. return object;
  14037. }
  14038. /**
  14039. * Sets the value at `path` of `object`. If a portion of `path` doesn't exist,
  14040. * it's created. Arrays are created for missing index properties while objects
  14041. * are created for all other missing properties. Use `_.setWith` to customize
  14042. * `path` creation.
  14043. *
  14044. * **Note:** This method mutates `object`.
  14045. *
  14046. * @static
  14047. * @memberOf _
  14048. * @since 3.7.0
  14049. * @category Object
  14050. * @param {Object} object The object to modify.
  14051. * @param {Array|string} path The path of the property to set.
  14052. * @param {*} value The value to set.
  14053. * @returns {Object} Returns `object`.
  14054. * @example
  14055. *
  14056. * var object = { 'a': [{ 'b': { 'c': 3 } }] };
  14057. *
  14058. * _.set(object, 'a[0].b.c', 4);
  14059. * console.log(object.a[0].b.c);
  14060. * // => 4
  14061. *
  14062. * _.set(object, ['x', '0', 'y', 'z'], 5);
  14063. * console.log(object.x[0].y.z);
  14064. * // => 5
  14065. */
  14066. function set(object, path, value) {
  14067. return object == null ? object : baseSet(object, path, value);
  14068. }
  14069. /**
  14070. * This method is like `_.set` except that it accepts `customizer` which is
  14071. * invoked to produce the objects of `path`. If `customizer` returns `undefined`
  14072. * path creation is handled by the method instead. The `customizer` is invoked
  14073. * with three arguments: (nsValue, key, nsObject).
  14074. *
  14075. * **Note:** This method mutates `object`.
  14076. *
  14077. * @static
  14078. * @memberOf _
  14079. * @since 4.0.0
  14080. * @category Object
  14081. * @param {Object} object The object to modify.
  14082. * @param {Array|string} path The path of the property to set.
  14083. * @param {*} value The value to set.
  14084. * @param {Function} [customizer] The function to customize assigned values.
  14085. * @returns {Object} Returns `object`.
  14086. * @example
  14087. *
  14088. * var object = {};
  14089. *
  14090. * _.setWith(object, '[0][1]', 'a', Object);
  14091. * // => { '0': { '1': 'a' } }
  14092. */
  14093. function setWith(object, path, value, customizer) {
  14094. customizer = typeof customizer == 'function' ? customizer : undefined;
  14095. return object == null ? object : baseSet(object, path, value, customizer);
  14096. }
  14097. /**
  14098. * Creates an array of own enumerable string keyed-value pairs for `object`
  14099. * which can be consumed by `_.fromPairs`. If `object` is a map or set, its
  14100. * entries are returned.
  14101. *
  14102. * @static
  14103. * @memberOf _
  14104. * @since 4.0.0
  14105. * @alias entries
  14106. * @category Object
  14107. * @param {Object} object The object to query.
  14108. * @returns {Array} Returns the key-value pairs.
  14109. * @example
  14110. *
  14111. * function Foo() {
  14112. * this.a = 1;
  14113. * this.b = 2;
  14114. * }
  14115. *
  14116. * Foo.prototype.c = 3;
  14117. *
  14118. * _.toPairs(new Foo);
  14119. * // => [['a', 1], ['b', 2]] (iteration order is not guaranteed)
  14120. */
  14121. var toPairs = createToPairs(keys);
  14122. /**
  14123. * Creates an array of own and inherited enumerable string keyed-value pairs
  14124. * for `object` which can be consumed by `_.fromPairs`. If `object` is a map
  14125. * or set, its entries are returned.
  14126. *
  14127. * @static
  14128. * @memberOf _
  14129. * @since 4.0.0
  14130. * @alias entriesIn
  14131. * @category Object
  14132. * @param {Object} object The object to query.
  14133. * @returns {Array} Returns the key-value pairs.
  14134. * @example
  14135. *
  14136. * function Foo() {
  14137. * this.a = 1;
  14138. * this.b = 2;
  14139. * }
  14140. *
  14141. * Foo.prototype.c = 3;
  14142. *
  14143. * _.toPairsIn(new Foo);
  14144. * // => [['a', 1], ['b', 2], ['c', 3]] (iteration order is not guaranteed)
  14145. */
  14146. var toPairsIn = createToPairs(keysIn);
  14147. /**
  14148. * An alternative to `_.reduce`; this method transforms `object` to a new
  14149. * `accumulator` object which is the result of running each of its own
  14150. * enumerable string keyed properties thru `iteratee`, with each invocation
  14151. * potentially mutating the `accumulator` object. If `accumulator` is not
  14152. * provided, a new object with the same `[[Prototype]]` will be used. The
  14153. * iteratee is invoked with four arguments: (accumulator, value, key, object).
  14154. * Iteratee functions may exit iteration early by explicitly returning `false`.
  14155. *
  14156. * @static
  14157. * @memberOf _
  14158. * @since 1.3.0
  14159. * @category Object
  14160. * @param {Object} object The object to iterate over.
  14161. * @param {Function} [iteratee=_.identity] The function invoked per iteration.
  14162. * @param {*} [accumulator] The custom accumulator value.
  14163. * @returns {*} Returns the accumulated value.
  14164. * @example
  14165. *
  14166. * _.transform([2, 3, 4], function(result, n) {
  14167. * result.push(n *= n);
  14168. * return n % 2 == 0;
  14169. * }, []);
  14170. * // => [4, 9]
  14171. *
  14172. * _.transform({ 'a': 1, 'b': 2, 'c': 1 }, function(result, value, key) {
  14173. * (result[value] || (result[value] = [])).push(key);
  14174. * }, {});
  14175. * // => { '1': ['a', 'c'], '2': ['b'] }
  14176. */
  14177. function transform(object, iteratee, accumulator) {
  14178. var isArr = isArray(object),
  14179. isArrLike = isArr || isBuffer(object) || isTypedArray(object);
  14180. iteratee = getIteratee(iteratee, 4);
  14181. if (accumulator == null) {
  14182. var Ctor = object && object.constructor;
  14183. if (isArrLike) {
  14184. accumulator = isArr ? new Ctor : [];
  14185. }
  14186. else if (isObject(object)) {
  14187. accumulator = isFunction(Ctor) ? baseCreate(getPrototype(object)) : {};
  14188. }
  14189. else {
  14190. accumulator = {};
  14191. }
  14192. }
  14193. (isArrLike ? arrayEach : baseForOwn)(object, function(value, index, object) {
  14194. return iteratee(accumulator, value, index, object);
  14195. });
  14196. return accumulator;
  14197. }
  14198. /**
  14199. * Removes the property at `path` of `object`.
  14200. *
  14201. * **Note:** This method mutates `object`.
  14202. *
  14203. * @static
  14204. * @memberOf _
  14205. * @since 4.0.0
  14206. * @category Object
  14207. * @param {Object} object The object to modify.
  14208. * @param {Array|string} path The path of the property to unset.
  14209. * @returns {boolean} Returns `true` if the property is deleted, else `false`.
  14210. * @example
  14211. *
  14212. * var object = { 'a': [{ 'b': { 'c': 7 } }] };
  14213. * _.unset(object, 'a[0].b.c');
  14214. * // => true
  14215. *
  14216. * console.log(object);
  14217. * // => { 'a': [{ 'b': {} }] };
  14218. *
  14219. * _.unset(object, ['a', '0', 'b', 'c']);
  14220. * // => true
  14221. *
  14222. * console.log(object);
  14223. * // => { 'a': [{ 'b': {} }] };
  14224. */
  14225. function unset(object, path) {
  14226. return object == null ? true : baseUnset(object, path);
  14227. }
  14228. /**
  14229. * This method is like `_.set` except that accepts `updater` to produce the
  14230. * value to set. Use `_.updateWith` to customize `path` creation. The `updater`
  14231. * is invoked with one argument: (value).
  14232. *
  14233. * **Note:** This method mutates `object`.
  14234. *
  14235. * @static
  14236. * @memberOf _
  14237. * @since 4.6.0
  14238. * @category Object
  14239. * @param {Object} object The object to modify.
  14240. * @param {Array|string} path The path of the property to set.
  14241. * @param {Function} updater The function to produce the updated value.
  14242. * @returns {Object} Returns `object`.
  14243. * @example
  14244. *
  14245. * var object = { 'a': [{ 'b': { 'c': 3 } }] };
  14246. *
  14247. * _.update(object, 'a[0].b.c', function(n) { return n * n; });
  14248. * console.log(object.a[0].b.c);
  14249. * // => 9
  14250. *
  14251. * _.update(object, 'x[0].y.z', function(n) { return n ? n + 1 : 0; });
  14252. * console.log(object.x[0].y.z);
  14253. * // => 0
  14254. */
  14255. function update(object, path, updater) {
  14256. return object == null ? object : baseUpdate(object, path, castFunction(updater));
  14257. }
  14258. /**
  14259. * This method is like `_.update` except that it accepts `customizer` which is
  14260. * invoked to produce the objects of `path`. If `customizer` returns `undefined`
  14261. * path creation is handled by the method instead. The `customizer` is invoked
  14262. * with three arguments: (nsValue, key, nsObject).
  14263. *
  14264. * **Note:** This method mutates `object`.
  14265. *
  14266. * @static
  14267. * @memberOf _
  14268. * @since 4.6.0
  14269. * @category Object
  14270. * @param {Object} object The object to modify.
  14271. * @param {Array|string} path The path of the property to set.
  14272. * @param {Function} updater The function to produce the updated value.
  14273. * @param {Function} [customizer] The function to customize assigned values.
  14274. * @returns {Object} Returns `object`.
  14275. * @example
  14276. *
  14277. * var object = {};
  14278. *
  14279. * _.updateWith(object, '[0][1]', _.constant('a'), Object);
  14280. * // => { '0': { '1': 'a' } }
  14281. */
  14282. function updateWith(object, path, updater, customizer) {
  14283. customizer = typeof customizer == 'function' ? customizer : undefined;
  14284. return object == null ? object : baseUpdate(object, path, castFunction(updater), customizer);
  14285. }
  14286. /**
  14287. * Creates an array of the own enumerable string keyed property values of `object`.
  14288. *
  14289. * **Note:** Non-object values are coerced to objects.
  14290. *
  14291. * @static
  14292. * @since 0.1.0
  14293. * @memberOf _
  14294. * @category Object
  14295. * @param {Object} object The object to query.
  14296. * @returns {Array} Returns the array of property values.
  14297. * @example
  14298. *
  14299. * function Foo() {
  14300. * this.a = 1;
  14301. * this.b = 2;
  14302. * }
  14303. *
  14304. * Foo.prototype.c = 3;
  14305. *
  14306. * _.values(new Foo);
  14307. * // => [1, 2] (iteration order is not guaranteed)
  14308. *
  14309. * _.values('hi');
  14310. * // => ['h', 'i']
  14311. */
  14312. function values(object) {
  14313. return object == null ? [] : baseValues(object, keys(object));
  14314. }
  14315. /**
  14316. * Creates an array of the own and inherited enumerable string keyed property
  14317. * values of `object`.
  14318. *
  14319. * **Note:** Non-object values are coerced to objects.
  14320. *
  14321. * @static
  14322. * @memberOf _
  14323. * @since 3.0.0
  14324. * @category Object
  14325. * @param {Object} object The object to query.
  14326. * @returns {Array} Returns the array of property values.
  14327. * @example
  14328. *
  14329. * function Foo() {
  14330. * this.a = 1;
  14331. * this.b = 2;
  14332. * }
  14333. *
  14334. * Foo.prototype.c = 3;
  14335. *
  14336. * _.valuesIn(new Foo);
  14337. * // => [1, 2, 3] (iteration order is not guaranteed)
  14338. */
  14339. function valuesIn(object) {
  14340. return object == null ? [] : baseValues(object, keysIn(object));
  14341. }
  14342. /*------------------------------------------------------------------------*/
  14343. /**
  14344. * Clamps `number` within the inclusive `lower` and `upper` bounds.
  14345. *
  14346. * @static
  14347. * @memberOf _
  14348. * @since 4.0.0
  14349. * @category Number
  14350. * @param {number} number The number to clamp.
  14351. * @param {number} [lower] The lower bound.
  14352. * @param {number} upper The upper bound.
  14353. * @returns {number} Returns the clamped number.
  14354. * @example
  14355. *
  14356. * _.clamp(-10, -5, 5);
  14357. * // => -5
  14358. *
  14359. * _.clamp(10, -5, 5);
  14360. * // => 5
  14361. */
  14362. function clamp(number, lower, upper) {
  14363. if (upper === undefined) {
  14364. upper = lower;
  14365. lower = undefined;
  14366. }
  14367. if (upper !== undefined) {
  14368. upper = toNumber(upper);
  14369. upper = upper === upper ? upper : 0;
  14370. }
  14371. if (lower !== undefined) {
  14372. lower = toNumber(lower);
  14373. lower = lower === lower ? lower : 0;
  14374. }
  14375. return baseClamp(toNumber(number), lower, upper);
  14376. }
  14377. /**
  14378. * Checks if `n` is between `start` and up to, but not including, `end`. If
  14379. * `end` is not specified, it's set to `start` with `start` then set to `0`.
  14380. * If `start` is greater than `end` the params are swapped to support
  14381. * negative ranges.
  14382. *
  14383. * @static
  14384. * @memberOf _
  14385. * @since 3.3.0
  14386. * @category Number
  14387. * @param {number} number The number to check.
  14388. * @param {number} [start=0] The start of the range.
  14389. * @param {number} end The end of the range.
  14390. * @returns {boolean} Returns `true` if `number` is in the range, else `false`.
  14391. * @see _.range, _.rangeRight
  14392. * @example
  14393. *
  14394. * _.inRange(3, 2, 4);
  14395. * // => true
  14396. *
  14397. * _.inRange(4, 8);
  14398. * // => true
  14399. *
  14400. * _.inRange(4, 2);
  14401. * // => false
  14402. *
  14403. * _.inRange(2, 2);
  14404. * // => false
  14405. *
  14406. * _.inRange(1.2, 2);
  14407. * // => true
  14408. *
  14409. * _.inRange(5.2, 4);
  14410. * // => false
  14411. *
  14412. * _.inRange(-3, -2, -6);
  14413. * // => true
  14414. */
  14415. function inRange(number, start, end) {
  14416. start = toFinite(start);
  14417. if (end === undefined) {
  14418. end = start;
  14419. start = 0;
  14420. } else {
  14421. end = toFinite(end);
  14422. }
  14423. number = toNumber(number);
  14424. return baseInRange(number, start, end);
  14425. }
  14426. /**
  14427. * Produces a random number between the inclusive `lower` and `upper` bounds.
  14428. * If only one argument is provided a number between `0` and the given number
  14429. * is returned. If `floating` is `true`, or either `lower` or `upper` are
  14430. * floats, a floating-point number is returned instead of an integer.
  14431. *
  14432. * **Note:** JavaScript follows the IEEE-754 standard for resolving
  14433. * floating-point values which can produce unexpected results.
  14434. *
  14435. * @static
  14436. * @memberOf _
  14437. * @since 0.7.0
  14438. * @category Number
  14439. * @param {number} [lower=0] The lower bound.
  14440. * @param {number} [upper=1] The upper bound.
  14441. * @param {boolean} [floating] Specify returning a floating-point number.
  14442. * @returns {number} Returns the random number.
  14443. * @example
  14444. *
  14445. * _.random(0, 5);
  14446. * // => an integer between 0 and 5
  14447. *
  14448. * _.random(5);
  14449. * // => also an integer between 0 and 5
  14450. *
  14451. * _.random(5, true);
  14452. * // => a floating-point number between 0 and 5
  14453. *
  14454. * _.random(1.2, 5.2);
  14455. * // => a floating-point number between 1.2 and 5.2
  14456. */
  14457. function random(lower, upper, floating) {
  14458. if (floating && typeof floating != 'boolean' && isIterateeCall(lower, upper, floating)) {
  14459. upper = floating = undefined;
  14460. }
  14461. if (floating === undefined) {
  14462. if (typeof upper == 'boolean') {
  14463. floating = upper;
  14464. upper = undefined;
  14465. }
  14466. else if (typeof lower == 'boolean') {
  14467. floating = lower;
  14468. lower = undefined;
  14469. }
  14470. }
  14471. if (lower === undefined && upper === undefined) {
  14472. lower = 0;
  14473. upper = 1;
  14474. }
  14475. else {
  14476. lower = toFinite(lower);
  14477. if (upper === undefined) {
  14478. upper = lower;
  14479. lower = 0;
  14480. } else {
  14481. upper = toFinite(upper);
  14482. }
  14483. }
  14484. if (lower > upper) {
  14485. var temp = lower;
  14486. lower = upper;
  14487. upper = temp;
  14488. }
  14489. if (floating || lower % 1 || upper % 1) {
  14490. var rand = nativeRandom();
  14491. return nativeMin(lower + (rand * (upper - lower + freeParseFloat('1e-' + ((rand + '').length - 1)))), upper);
  14492. }
  14493. return baseRandom(lower, upper);
  14494. }
  14495. /*------------------------------------------------------------------------*/
  14496. /**
  14497. * Converts `string` to [camel case](https://en.wikipedia.org/wiki/CamelCase).
  14498. *
  14499. * @static
  14500. * @memberOf _
  14501. * @since 3.0.0
  14502. * @category String
  14503. * @param {string} [string=''] The string to convert.
  14504. * @returns {string} Returns the camel cased string.
  14505. * @example
  14506. *
  14507. * _.camelCase('Foo Bar');
  14508. * // => 'fooBar'
  14509. *
  14510. * _.camelCase('--foo-bar--');
  14511. * // => 'fooBar'
  14512. *
  14513. * _.camelCase('__FOO_BAR__');
  14514. * // => 'fooBar'
  14515. */
  14516. var camelCase = createCompounder(function(result, word, index) {
  14517. word = word.toLowerCase();
  14518. return result + (index ? capitalize(word) : word);
  14519. });
  14520. /**
  14521. * Converts the first character of `string` to upper case and the remaining
  14522. * to lower case.
  14523. *
  14524. * @static
  14525. * @memberOf _
  14526. * @since 3.0.0
  14527. * @category String
  14528. * @param {string} [string=''] The string to capitalize.
  14529. * @returns {string} Returns the capitalized string.
  14530. * @example
  14531. *
  14532. * _.capitalize('FRED');
  14533. * // => 'Fred'
  14534. */
  14535. function capitalize(string) {
  14536. return upperFirst(toString(string).toLowerCase());
  14537. }
  14538. /**
  14539. * Deburrs `string` by converting
  14540. * [Latin-1 Supplement](https://en.wikipedia.org/wiki/Latin-1_Supplement_(Unicode_block)#Character_table)
  14541. * and [Latin Extended-A](https://en.wikipedia.org/wiki/Latin_Extended-A)
  14542. * letters to basic Latin letters and removing
  14543. * [combining diacritical marks](https://en.wikipedia.org/wiki/Combining_Diacritical_Marks).
  14544. *
  14545. * @static
  14546. * @memberOf _
  14547. * @since 3.0.0
  14548. * @category String
  14549. * @param {string} [string=''] The string to deburr.
  14550. * @returns {string} Returns the deburred string.
  14551. * @example
  14552. *
  14553. * _.deburr('déjà vu');
  14554. * // => 'deja vu'
  14555. */
  14556. function deburr(string) {
  14557. string = toString(string);
  14558. return string && string.replace(reLatin, deburrLetter).replace(reComboMark, '');
  14559. }
  14560. /**
  14561. * Checks if `string` ends with the given target string.
  14562. *
  14563. * @static
  14564. * @memberOf _
  14565. * @since 3.0.0
  14566. * @category String
  14567. * @param {string} [string=''] The string to inspect.
  14568. * @param {string} [target] The string to search for.
  14569. * @param {number} [position=string.length] The position to search up to.
  14570. * @returns {boolean} Returns `true` if `string` ends with `target`,
  14571. * else `false`.
  14572. * @example
  14573. *
  14574. * _.endsWith('abc', 'c');
  14575. * // => true
  14576. *
  14577. * _.endsWith('abc', 'b');
  14578. * // => false
  14579. *
  14580. * _.endsWith('abc', 'b', 2);
  14581. * // => true
  14582. */
  14583. function endsWith(string, target, position) {
  14584. string = toString(string);
  14585. target = baseToString(target);
  14586. var length = string.length;
  14587. position = position === undefined
  14588. ? length
  14589. : baseClamp(toInteger(position), 0, length);
  14590. var end = position;
  14591. position -= target.length;
  14592. return position >= 0 && string.slice(position, end) == target;
  14593. }
  14594. /**
  14595. * Converts the characters "&", "<", ">", '"', and "'" in `string` to their
  14596. * corresponding HTML entities.
  14597. *
  14598. * **Note:** No other characters are escaped. To escape additional
  14599. * characters use a third-party library like [_he_](https://mths.be/he).
  14600. *
  14601. * Though the ">" character is escaped for symmetry, characters like
  14602. * ">" and "/" don't need escaping in HTML and have no special meaning
  14603. * unless they're part of a tag or unquoted attribute value. See
  14604. * [Mathias Bynens's article](https://mathiasbynens.be/notes/ambiguous-ampersands)
  14605. * (under "semi-related fun fact") for more details.
  14606. *
  14607. * When working with HTML you should always
  14608. * [quote attribute values](http://wonko.com/post/html-escaping) to reduce
  14609. * XSS vectors.
  14610. *
  14611. * @static
  14612. * @since 0.1.0
  14613. * @memberOf _
  14614. * @category String
  14615. * @param {string} [string=''] The string to escape.
  14616. * @returns {string} Returns the escaped string.
  14617. * @example
  14618. *
  14619. * _.escape('fred, barney, & pebbles');
  14620. * // => 'fred, barney, &amp; pebbles'
  14621. */
  14622. function escape(string) {
  14623. string = toString(string);
  14624. return (string && reHasUnescapedHtml.test(string))
  14625. ? string.replace(reUnescapedHtml, escapeHtmlChar)
  14626. : string;
  14627. }
  14628. /**
  14629. * Escapes the `RegExp` special characters "^", "$", "\", ".", "*", "+",
  14630. * "?", "(", ")", "[", "]", "{", "}", and "|" in `string`.
  14631. *
  14632. * @static
  14633. * @memberOf _
  14634. * @since 3.0.0
  14635. * @category String
  14636. * @param {string} [string=''] The string to escape.
  14637. * @returns {string} Returns the escaped string.
  14638. * @example
  14639. *
  14640. * _.escapeRegExp('[lodash](https://lodash.com/)');
  14641. * // => '\[lodash\]\(https://lodash\.com/\)'
  14642. */
  14643. function escapeRegExp(string) {
  14644. string = toString(string);
  14645. return (string && reHasRegExpChar.test(string))
  14646. ? string.replace(reRegExpChar, '\\$&')
  14647. : string;
  14648. }
  14649. /**
  14650. * Converts `string` to
  14651. * [kebab case](https://en.wikipedia.org/wiki/Letter_case#Special_case_styles).
  14652. *
  14653. * @static
  14654. * @memberOf _
  14655. * @since 3.0.0
  14656. * @category String
  14657. * @param {string} [string=''] The string to convert.
  14658. * @returns {string} Returns the kebab cased string.
  14659. * @example
  14660. *
  14661. * _.kebabCase('Foo Bar');
  14662. * // => 'foo-bar'
  14663. *
  14664. * _.kebabCase('fooBar');
  14665. * // => 'foo-bar'
  14666. *
  14667. * _.kebabCase('__FOO_BAR__');
  14668. * // => 'foo-bar'
  14669. */
  14670. var kebabCase = createCompounder(function(result, word, index) {
  14671. return result + (index ? '-' : '') + word.toLowerCase();
  14672. });
  14673. /**
  14674. * Converts `string`, as space separated words, to lower case.
  14675. *
  14676. * @static
  14677. * @memberOf _
  14678. * @since 4.0.0
  14679. * @category String
  14680. * @param {string} [string=''] The string to convert.
  14681. * @returns {string} Returns the lower cased string.
  14682. * @example
  14683. *
  14684. * _.lowerCase('--Foo-Bar--');
  14685. * // => 'foo bar'
  14686. *
  14687. * _.lowerCase('fooBar');
  14688. * // => 'foo bar'
  14689. *
  14690. * _.lowerCase('__FOO_BAR__');
  14691. * // => 'foo bar'
  14692. */
  14693. var lowerCase = createCompounder(function(result, word, index) {
  14694. return result + (index ? ' ' : '') + word.toLowerCase();
  14695. });
  14696. /**
  14697. * Converts the first character of `string` to lower case.
  14698. *
  14699. * @static
  14700. * @memberOf _
  14701. * @since 4.0.0
  14702. * @category String
  14703. * @param {string} [string=''] The string to convert.
  14704. * @returns {string} Returns the converted string.
  14705. * @example
  14706. *
  14707. * _.lowerFirst('Fred');
  14708. * // => 'fred'
  14709. *
  14710. * _.lowerFirst('FRED');
  14711. * // => 'fRED'
  14712. */
  14713. var lowerFirst = createCaseFirst('toLowerCase');
  14714. /**
  14715. * Pads `string` on the left and right sides if it's shorter than `length`.
  14716. * Padding characters are truncated if they can't be evenly divided by `length`.
  14717. *
  14718. * @static
  14719. * @memberOf _
  14720. * @since 3.0.0
  14721. * @category String
  14722. * @param {string} [string=''] The string to pad.
  14723. * @param {number} [length=0] The padding length.
  14724. * @param {string} [chars=' '] The string used as padding.
  14725. * @returns {string} Returns the padded string.
  14726. * @example
  14727. *
  14728. * _.pad('abc', 8);
  14729. * // => ' abc '
  14730. *
  14731. * _.pad('abc', 8, '_-');
  14732. * // => '_-abc_-_'
  14733. *
  14734. * _.pad('abc', 3);
  14735. * // => 'abc'
  14736. */
  14737. function pad(string, length, chars) {
  14738. string = toString(string);
  14739. length = toInteger(length);
  14740. var strLength = length ? stringSize(string) : 0;
  14741. if (!length || strLength >= length) {
  14742. return string;
  14743. }
  14744. var mid = (length - strLength) / 2;
  14745. return (
  14746. createPadding(nativeFloor(mid), chars) +
  14747. string +
  14748. createPadding(nativeCeil(mid), chars)
  14749. );
  14750. }
  14751. /**
  14752. * Pads `string` on the right side if it's shorter than `length`. Padding
  14753. * characters are truncated if they exceed `length`.
  14754. *
  14755. * @static
  14756. * @memberOf _
  14757. * @since 4.0.0
  14758. * @category String
  14759. * @param {string} [string=''] The string to pad.
  14760. * @param {number} [length=0] The padding length.
  14761. * @param {string} [chars=' '] The string used as padding.
  14762. * @returns {string} Returns the padded string.
  14763. * @example
  14764. *
  14765. * _.padEnd('abc', 6);
  14766. * // => 'abc '
  14767. *
  14768. * _.padEnd('abc', 6, '_-');
  14769. * // => 'abc_-_'
  14770. *
  14771. * _.padEnd('abc', 3);
  14772. * // => 'abc'
  14773. */
  14774. function padEnd(string, length, chars) {
  14775. string = toString(string);
  14776. length = toInteger(length);
  14777. var strLength = length ? stringSize(string) : 0;
  14778. return (length && strLength < length)
  14779. ? (string + createPadding(length - strLength, chars))
  14780. : string;
  14781. }
  14782. /**
  14783. * Pads `string` on the left side if it's shorter than `length`. Padding
  14784. * characters are truncated if they exceed `length`.
  14785. *
  14786. * @static
  14787. * @memberOf _
  14788. * @since 4.0.0
  14789. * @category String
  14790. * @param {string} [string=''] The string to pad.
  14791. * @param {number} [length=0] The padding length.
  14792. * @param {string} [chars=' '] The string used as padding.
  14793. * @returns {string} Returns the padded string.
  14794. * @example
  14795. *
  14796. * _.padStart('abc', 6);
  14797. * // => ' abc'
  14798. *
  14799. * _.padStart('abc', 6, '_-');
  14800. * // => '_-_abc'
  14801. *
  14802. * _.padStart('abc', 3);
  14803. * // => 'abc'
  14804. */
  14805. function padStart(string, length, chars) {
  14806. string = toString(string);
  14807. length = toInteger(length);
  14808. var strLength = length ? stringSize(string) : 0;
  14809. return (length && strLength < length)
  14810. ? (createPadding(length - strLength, chars) + string)
  14811. : string;
  14812. }
  14813. /**
  14814. * Converts `string` to an integer of the specified radix. If `radix` is
  14815. * `undefined` or `0`, a `radix` of `10` is used unless `value` is a
  14816. * hexadecimal, in which case a `radix` of `16` is used.
  14817. *
  14818. * **Note:** This method aligns with the
  14819. * [ES5 implementation](https://es5.github.io/#x15.1.2.2) of `parseInt`.
  14820. *
  14821. * @static
  14822. * @memberOf _
  14823. * @since 1.1.0
  14824. * @category String
  14825. * @param {string} string The string to convert.
  14826. * @param {number} [radix=10] The radix to interpret `value` by.
  14827. * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
  14828. * @returns {number} Returns the converted integer.
  14829. * @example
  14830. *
  14831. * _.parseInt('08');
  14832. * // => 8
  14833. *
  14834. * _.map(['6', '08', '10'], _.parseInt);
  14835. * // => [6, 8, 10]
  14836. */
  14837. function parseInt(string, radix, guard) {
  14838. if (guard || radix == null) {
  14839. radix = 0;
  14840. } else if (radix) {
  14841. radix = +radix;
  14842. }
  14843. return nativeParseInt(toString(string).replace(reTrimStart, ''), radix || 0);
  14844. }
  14845. /**
  14846. * Repeats the given string `n` times.
  14847. *
  14848. * @static
  14849. * @memberOf _
  14850. * @since 3.0.0
  14851. * @category String
  14852. * @param {string} [string=''] The string to repeat.
  14853. * @param {number} [n=1] The number of times to repeat the string.
  14854. * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
  14855. * @returns {string} Returns the repeated string.
  14856. * @example
  14857. *
  14858. * _.repeat('*', 3);
  14859. * // => '***'
  14860. *
  14861. * _.repeat('abc', 2);
  14862. * // => 'abcabc'
  14863. *
  14864. * _.repeat('abc', 0);
  14865. * // => ''
  14866. */
  14867. function repeat(string, n, guard) {
  14868. if ((guard ? isIterateeCall(string, n, guard) : n === undefined)) {
  14869. n = 1;
  14870. } else {
  14871. n = toInteger(n);
  14872. }
  14873. return baseRepeat(toString(string), n);
  14874. }
  14875. /**
  14876. * Replaces matches for `pattern` in `string` with `replacement`.
  14877. *
  14878. * **Note:** This method is based on
  14879. * [`String#replace`](https://mdn.io/String/replace).
  14880. *
  14881. * @static
  14882. * @memberOf _
  14883. * @since 4.0.0
  14884. * @category String
  14885. * @param {string} [string=''] The string to modify.
  14886. * @param {RegExp|string} pattern The pattern to replace.
  14887. * @param {Function|string} replacement The match replacement.
  14888. * @returns {string} Returns the modified string.
  14889. * @example
  14890. *
  14891. * _.replace('Hi Fred', 'Fred', 'Barney');
  14892. * // => 'Hi Barney'
  14893. */
  14894. function replace() {
  14895. var args = arguments,
  14896. string = toString(args[0]);
  14897. return args.length < 3 ? string : string.replace(args[1], args[2]);
  14898. }
  14899. /**
  14900. * Converts `string` to
  14901. * [snake case](https://en.wikipedia.org/wiki/Snake_case).
  14902. *
  14903. * @static
  14904. * @memberOf _
  14905. * @since 3.0.0
  14906. * @category String
  14907. * @param {string} [string=''] The string to convert.
  14908. * @returns {string} Returns the snake cased string.
  14909. * @example
  14910. *
  14911. * _.snakeCase('Foo Bar');
  14912. * // => 'foo_bar'
  14913. *
  14914. * _.snakeCase('fooBar');
  14915. * // => 'foo_bar'
  14916. *
  14917. * _.snakeCase('--FOO-BAR--');
  14918. * // => 'foo_bar'
  14919. */
  14920. var snakeCase = createCompounder(function(result, word, index) {
  14921. return result + (index ? '_' : '') + word.toLowerCase();
  14922. });
  14923. /**
  14924. * Splits `string` by `separator`.
  14925. *
  14926. * **Note:** This method is based on
  14927. * [`String#split`](https://mdn.io/String/split).
  14928. *
  14929. * @static
  14930. * @memberOf _
  14931. * @since 4.0.0
  14932. * @category String
  14933. * @param {string} [string=''] The string to split.
  14934. * @param {RegExp|string} separator The separator pattern to split by.
  14935. * @param {number} [limit] The length to truncate results to.
  14936. * @returns {Array} Returns the string segments.
  14937. * @example
  14938. *
  14939. * _.split('a-b-c', '-', 2);
  14940. * // => ['a', 'b']
  14941. */
  14942. function split(string, separator, limit) {
  14943. if (limit && typeof limit != 'number' && isIterateeCall(string, separator, limit)) {
  14944. separator = limit = undefined;
  14945. }
  14946. limit = limit === undefined ? MAX_ARRAY_LENGTH : limit >>> 0;
  14947. if (!limit) {
  14948. return [];
  14949. }
  14950. string = toString(string);
  14951. if (string && (
  14952. typeof separator == 'string' ||
  14953. (separator != null && !isRegExp(separator))
  14954. )) {
  14955. separator = baseToString(separator);
  14956. if (!separator && hasUnicode(string)) {
  14957. return castSlice(stringToArray(string), 0, limit);
  14958. }
  14959. }
  14960. return string.split(separator, limit);
  14961. }
  14962. /**
  14963. * Converts `string` to
  14964. * [start case](https://en.wikipedia.org/wiki/Letter_case#Stylistic_or_specialised_usage).
  14965. *
  14966. * @static
  14967. * @memberOf _
  14968. * @since 3.1.0
  14969. * @category String
  14970. * @param {string} [string=''] The string to convert.
  14971. * @returns {string} Returns the start cased string.
  14972. * @example
  14973. *
  14974. * _.startCase('--foo-bar--');
  14975. * // => 'Foo Bar'
  14976. *
  14977. * _.startCase('fooBar');
  14978. * // => 'Foo Bar'
  14979. *
  14980. * _.startCase('__FOO_BAR__');
  14981. * // => 'FOO BAR'
  14982. */
  14983. var startCase = createCompounder(function(result, word, index) {
  14984. return result + (index ? ' ' : '') + upperFirst(word);
  14985. });
  14986. /**
  14987. * Checks if `string` starts with the given target string.
  14988. *
  14989. * @static
  14990. * @memberOf _
  14991. * @since 3.0.0
  14992. * @category String
  14993. * @param {string} [string=''] The string to inspect.
  14994. * @param {string} [target] The string to search for.
  14995. * @param {number} [position=0] The position to search from.
  14996. * @returns {boolean} Returns `true` if `string` starts with `target`,
  14997. * else `false`.
  14998. * @example
  14999. *
  15000. * _.startsWith('abc', 'a');
  15001. * // => true
  15002. *
  15003. * _.startsWith('abc', 'b');
  15004. * // => false
  15005. *
  15006. * _.startsWith('abc', 'b', 1);
  15007. * // => true
  15008. */
  15009. function startsWith(string, target, position) {
  15010. string = toString(string);
  15011. position = position == null
  15012. ? 0
  15013. : baseClamp(toInteger(position), 0, string.length);
  15014. target = baseToString(target);
  15015. return string.slice(position, position + target.length) == target;
  15016. }
  15017. /**
  15018. * Creates a compiled template function that can interpolate data properties
  15019. * in "interpolate" delimiters, HTML-escape interpolated data properties in
  15020. * "escape" delimiters, and execute JavaScript in "evaluate" delimiters. Data
  15021. * properties may be accessed as free variables in the template. If a setting
  15022. * object is given, it takes precedence over `_.templateSettings` values.
  15023. *
  15024. * **Note:** In the development build `_.template` utilizes
  15025. * [sourceURLs](http://www.html5rocks.com/en/tutorials/developertools/sourcemaps/#toc-sourceurl)
  15026. * for easier debugging.
  15027. *
  15028. * For more information on precompiling templates see
  15029. * [lodash's custom builds documentation](https://lodash.com/custom-builds).
  15030. *
  15031. * For more information on Chrome extension sandboxes see
  15032. * [Chrome's extensions documentation](https://developer.chrome.com/extensions/sandboxingEval).
  15033. *
  15034. * @static
  15035. * @since 0.1.0
  15036. * @memberOf _
  15037. * @category String
  15038. * @param {string} [string=''] The template string.
  15039. * @param {Object} [options={}] The options object.
  15040. * @param {RegExp} [options.escape=_.templateSettings.escape]
  15041. * The HTML "escape" delimiter.
  15042. * @param {RegExp} [options.evaluate=_.templateSettings.evaluate]
  15043. * The "evaluate" delimiter.
  15044. * @param {Object} [options.imports=_.templateSettings.imports]
  15045. * An object to import into the template as free variables.
  15046. * @param {RegExp} [options.interpolate=_.templateSettings.interpolate]
  15047. * The "interpolate" delimiter.
  15048. * @param {string} [options.sourceURL='lodash.templateSources[n]']
  15049. * The sourceURL of the compiled template.
  15050. * @param {string} [options.variable='obj']
  15051. * The data object variable name.
  15052. * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
  15053. * @returns {Function} Returns the compiled template function.
  15054. * @example
  15055. *
  15056. * // Use the "interpolate" delimiter to create a compiled template.
  15057. * var compiled = _.template('hello <%= user %>!');
  15058. * compiled({ 'user': 'fred' });
  15059. * // => 'hello fred!'
  15060. *
  15061. * // Use the HTML "escape" delimiter to escape data property values.
  15062. * var compiled = _.template('<b><%- value %></b>');
  15063. * compiled({ 'value': '<script>' });
  15064. * // => '<b>&lt;script&gt;</b>'
  15065. *
  15066. * // Use the "evaluate" delimiter to execute JavaScript and generate HTML.
  15067. * var compiled = _.template('<% _.forEach(users, function(user) { %><li><%- user %></li><% }); %>');
  15068. * compiled({ 'users': ['fred', 'barney'] });
  15069. * // => '<li>fred</li><li>barney</li>'
  15070. *
  15071. * // Use the internal `print` function in "evaluate" delimiters.
  15072. * var compiled = _.template('<% print("hello " + user); %>!');
  15073. * compiled({ 'user': 'barney' });
  15074. * // => 'hello barney!'
  15075. *
  15076. * // Use the ES template literal delimiter as an "interpolate" delimiter.
  15077. * // Disable support by replacing the "interpolate" delimiter.
  15078. * var compiled = _.template('hello ${ user }!');
  15079. * compiled({ 'user': 'pebbles' });
  15080. * // => 'hello pebbles!'
  15081. *
  15082. * // Use backslashes to treat delimiters as plain text.
  15083. * var compiled = _.template('<%= "\\<%- value %\\>" %>');
  15084. * compiled({ 'value': 'ignored' });
  15085. * // => '<%- value %>'
  15086. *
  15087. * // Use the `imports` option to import `jQuery` as `jq`.
  15088. * var text = '<% jq.each(users, function(user) { %><li><%- user %></li><% }); %>';
  15089. * var compiled = _.template(text, { 'imports': { 'jq': jQuery } });
  15090. * compiled({ 'users': ['fred', 'barney'] });
  15091. * // => '<li>fred</li><li>barney</li>'
  15092. *
  15093. * // Use the `sourceURL` option to specify a custom sourceURL for the template.
  15094. * var compiled = _.template('hello <%= user %>!', { 'sourceURL': '/basic/greeting.jst' });
  15095. * compiled(data);
  15096. * // => Find the source of "greeting.jst" under the Sources tab or Resources panel of the web inspector.
  15097. *
  15098. * // Use the `variable` option to ensure a with-statement isn't used in the compiled template.
  15099. * var compiled = _.template('hi <%= data.user %>!', { 'variable': 'data' });
  15100. * compiled.source;
  15101. * // => function(data) {
  15102. * // var __t, __p = '';
  15103. * // __p += 'hi ' + ((__t = ( data.user )) == null ? '' : __t) + '!';
  15104. * // return __p;
  15105. * // }
  15106. *
  15107. * // Use custom template delimiters.
  15108. * _.templateSettings.interpolate = /{{([\s\S]+?)}}/g;
  15109. * var compiled = _.template('hello {{ user }}!');
  15110. * compiled({ 'user': 'mustache' });
  15111. * // => 'hello mustache!'
  15112. *
  15113. * // Use the `source` property to inline compiled templates for meaningful
  15114. * // line numbers in error messages and stack traces.
  15115. * fs.writeFileSync(path.join(process.cwd(), 'jst.js'), '\
  15116. * var JST = {\
  15117. * "main": ' + _.template(mainText).source + '\
  15118. * };\
  15119. * ');
  15120. */
  15121. function template(string, options, guard) {
  15122. // Based on John Resig's `tmpl` implementation
  15123. // (http://ejohn.org/blog/javascript-micro-templating/)
  15124. // and Laura Doktorova's doT.js (https://github.com/olado/doT).
  15125. var settings = lodash.templateSettings;
  15126. if (guard && isIterateeCall(string, options, guard)) {
  15127. options = undefined;
  15128. }
  15129. string = toString(string);
  15130. options = assignInWith({}, options, settings, customDefaultsAssignIn);
  15131. var imports = assignInWith({}, options.imports, settings.imports, customDefaultsAssignIn),
  15132. importsKeys = keys(imports),
  15133. importsValues = baseValues(imports, importsKeys);
  15134. var isEscaping,
  15135. isEvaluating,
  15136. index = 0,
  15137. interpolate = options.interpolate || reNoMatch,
  15138. source = "__p += '";
  15139. // Compile the regexp to match each delimiter.
  15140. var reDelimiters = RegExp(
  15141. (options.escape || reNoMatch).source + '|' +
  15142. interpolate.source + '|' +
  15143. (interpolate === reInterpolate ? reEsTemplate : reNoMatch).source + '|' +
  15144. (options.evaluate || reNoMatch).source + '|$'
  15145. , 'g');
  15146. // Use a sourceURL for easier debugging.
  15147. var sourceURL = '//# sourceURL=' +
  15148. ('sourceURL' in options
  15149. ? options.sourceURL
  15150. : ('lodash.templateSources[' + (++templateCounter) + ']')
  15151. ) + '\n';
  15152. string.replace(reDelimiters, function(match, escapeValue, interpolateValue, esTemplateValue, evaluateValue, offset) {
  15153. interpolateValue || (interpolateValue = esTemplateValue);
  15154. // Escape characters that can't be included in string literals.
  15155. source += string.slice(index, offset).replace(reUnescapedString, escapeStringChar);
  15156. // Replace delimiters with snippets.
  15157. if (escapeValue) {
  15158. isEscaping = true;
  15159. source += "' +\n__e(" + escapeValue + ") +\n'";
  15160. }
  15161. if (evaluateValue) {
  15162. isEvaluating = true;
  15163. source += "';\n" + evaluateValue + ";\n__p += '";
  15164. }
  15165. if (interpolateValue) {
  15166. source += "' +\n((__t = (" + interpolateValue + ")) == null ? '' : __t) +\n'";
  15167. }
  15168. index = offset + match.length;
  15169. // The JS engine embedded in Adobe products needs `match` returned in
  15170. // order to produce the correct `offset` value.
  15171. return match;
  15172. });
  15173. source += "';\n";
  15174. // If `variable` is not specified wrap a with-statement around the generated
  15175. // code to add the data object to the top of the scope chain.
  15176. var variable = options.variable;
  15177. if (!variable) {
  15178. source = 'with (obj) {\n' + source + '\n}\n';
  15179. }
  15180. // Cleanup code by stripping empty strings.
  15181. source = (isEvaluating ? source.replace(reEmptyStringLeading, '') : source)
  15182. .replace(reEmptyStringMiddle, '$1')
  15183. .replace(reEmptyStringTrailing, '$1;');
  15184. // Frame code as the function body.
  15185. source = 'function(' + (variable || 'obj') + ') {\n' +
  15186. (variable
  15187. ? ''
  15188. : 'obj || (obj = {});\n'
  15189. ) +
  15190. "var __t, __p = ''" +
  15191. (isEscaping
  15192. ? ', __e = _.escape'
  15193. : ''
  15194. ) +
  15195. (isEvaluating
  15196. ? ', __j = Array.prototype.join;\n' +
  15197. "function print() { __p += __j.call(arguments, '') }\n"
  15198. : ';\n'
  15199. ) +
  15200. source +
  15201. 'return __p\n}';
  15202. var result = attempt(function() {
  15203. return Function(importsKeys, sourceURL + 'return ' + source)
  15204. .apply(undefined, importsValues);
  15205. });
  15206. // Provide the compiled function's source by its `toString` method or
  15207. // the `source` property as a convenience for inlining compiled templates.
  15208. result.source = source;
  15209. if (isError(result)) {
  15210. throw result;
  15211. }
  15212. return result;
  15213. }
  15214. /**
  15215. * Converts `string`, as a whole, to lower case just like
  15216. * [String#toLowerCase](https://mdn.io/toLowerCase).
  15217. *
  15218. * @static
  15219. * @memberOf _
  15220. * @since 4.0.0
  15221. * @category String
  15222. * @param {string} [string=''] The string to convert.
  15223. * @returns {string} Returns the lower cased string.
  15224. * @example
  15225. *
  15226. * _.toLower('--Foo-Bar--');
  15227. * // => '--foo-bar--'
  15228. *
  15229. * _.toLower('fooBar');
  15230. * // => 'foobar'
  15231. *
  15232. * _.toLower('__FOO_BAR__');
  15233. * // => '__foo_bar__'
  15234. */
  15235. function toLower(value) {
  15236. return toString(value).toLowerCase();
  15237. }
  15238. /**
  15239. * Converts `string`, as a whole, to upper case just like
  15240. * [String#toUpperCase](https://mdn.io/toUpperCase).
  15241. *
  15242. * @static
  15243. * @memberOf _
  15244. * @since 4.0.0
  15245. * @category String
  15246. * @param {string} [string=''] The string to convert.
  15247. * @returns {string} Returns the upper cased string.
  15248. * @example
  15249. *
  15250. * _.toUpper('--foo-bar--');
  15251. * // => '--FOO-BAR--'
  15252. *
  15253. * _.toUpper('fooBar');
  15254. * // => 'FOOBAR'
  15255. *
  15256. * _.toUpper('__foo_bar__');
  15257. * // => '__FOO_BAR__'
  15258. */
  15259. function toUpper(value) {
  15260. return toString(value).toUpperCase();
  15261. }
  15262. /**
  15263. * Removes leading and trailing whitespace or specified characters from `string`.
  15264. *
  15265. * @static
  15266. * @memberOf _
  15267. * @since 3.0.0
  15268. * @category String
  15269. * @param {string} [string=''] The string to trim.
  15270. * @param {string} [chars=whitespace] The characters to trim.
  15271. * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
  15272. * @returns {string} Returns the trimmed string.
  15273. * @example
  15274. *
  15275. * _.trim(' abc ');
  15276. * // => 'abc'
  15277. *
  15278. * _.trim('-_-abc-_-', '_-');
  15279. * // => 'abc'
  15280. *
  15281. * _.map([' foo ', ' bar '], _.trim);
  15282. * // => ['foo', 'bar']
  15283. */
  15284. function trim(string, chars, guard) {
  15285. string = toString(string);
  15286. if (string && (guard || chars === undefined)) {
  15287. return string.replace(reTrim, '');
  15288. }
  15289. if (!string || !(chars = baseToString(chars))) {
  15290. return string;
  15291. }
  15292. var strSymbols = stringToArray(string),
  15293. chrSymbols = stringToArray(chars),
  15294. start = charsStartIndex(strSymbols, chrSymbols),
  15295. end = charsEndIndex(strSymbols, chrSymbols) + 1;
  15296. return castSlice(strSymbols, start, end).join('');
  15297. }
  15298. /**
  15299. * Removes trailing whitespace or specified characters from `string`.
  15300. *
  15301. * @static
  15302. * @memberOf _
  15303. * @since 4.0.0
  15304. * @category String
  15305. * @param {string} [string=''] The string to trim.
  15306. * @param {string} [chars=whitespace] The characters to trim.
  15307. * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
  15308. * @returns {string} Returns the trimmed string.
  15309. * @example
  15310. *
  15311. * _.trimEnd(' abc ');
  15312. * // => ' abc'
  15313. *
  15314. * _.trimEnd('-_-abc-_-', '_-');
  15315. * // => '-_-abc'
  15316. */
  15317. function trimEnd(string, chars, guard) {
  15318. string = toString(string);
  15319. if (string && (guard || chars === undefined)) {
  15320. return string.replace(reTrimEnd, '');
  15321. }
  15322. if (!string || !(chars = baseToString(chars))) {
  15323. return string;
  15324. }
  15325. var strSymbols = stringToArray(string),
  15326. end = charsEndIndex(strSymbols, stringToArray(chars)) + 1;
  15327. return castSlice(strSymbols, 0, end).join('');
  15328. }
  15329. /**
  15330. * Removes leading whitespace or specified characters from `string`.
  15331. *
  15332. * @static
  15333. * @memberOf _
  15334. * @since 4.0.0
  15335. * @category String
  15336. * @param {string} [string=''] The string to trim.
  15337. * @param {string} [chars=whitespace] The characters to trim.
  15338. * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
  15339. * @returns {string} Returns the trimmed string.
  15340. * @example
  15341. *
  15342. * _.trimStart(' abc ');
  15343. * // => 'abc '
  15344. *
  15345. * _.trimStart('-_-abc-_-', '_-');
  15346. * // => 'abc-_-'
  15347. */
  15348. function trimStart(string, chars, guard) {
  15349. string = toString(string);
  15350. if (string && (guard || chars === undefined)) {
  15351. return string.replace(reTrimStart, '');
  15352. }
  15353. if (!string || !(chars = baseToString(chars))) {
  15354. return string;
  15355. }
  15356. var strSymbols = stringToArray(string),
  15357. start = charsStartIndex(strSymbols, stringToArray(chars));
  15358. return castSlice(strSymbols, start).join('');
  15359. }
  15360. /**
  15361. * Truncates `string` if it's longer than the given maximum string length.
  15362. * The last characters of the truncated string are replaced with the omission
  15363. * string which defaults to "...".
  15364. *
  15365. * @static
  15366. * @memberOf _
  15367. * @since 4.0.0
  15368. * @category String
  15369. * @param {string} [string=''] The string to truncate.
  15370. * @param {Object} [options={}] The options object.
  15371. * @param {number} [options.length=30] The maximum string length.
  15372. * @param {string} [options.omission='...'] The string to indicate text is omitted.
  15373. * @param {RegExp|string} [options.separator] The separator pattern to truncate to.
  15374. * @returns {string} Returns the truncated string.
  15375. * @example
  15376. *
  15377. * _.truncate('hi-diddly-ho there, neighborino');
  15378. * // => 'hi-diddly-ho there, neighbo...'
  15379. *
  15380. * _.truncate('hi-diddly-ho there, neighborino', {
  15381. * 'length': 24,
  15382. * 'separator': ' '
  15383. * });
  15384. * // => 'hi-diddly-ho there,...'
  15385. *
  15386. * _.truncate('hi-diddly-ho there, neighborino', {
  15387. * 'length': 24,
  15388. * 'separator': /,? +/
  15389. * });
  15390. * // => 'hi-diddly-ho there...'
  15391. *
  15392. * _.truncate('hi-diddly-ho there, neighborino', {
  15393. * 'omission': ' [...]'
  15394. * });
  15395. * // => 'hi-diddly-ho there, neig [...]'
  15396. */
  15397. function truncate(string, options) {
  15398. var length = DEFAULT_TRUNC_LENGTH,
  15399. omission = DEFAULT_TRUNC_OMISSION;
  15400. if (isObject(options)) {
  15401. var separator = 'separator' in options ? options.separator : separator;
  15402. length = 'length' in options ? toInteger(options.length) : length;
  15403. omission = 'omission' in options ? baseToString(options.omission) : omission;
  15404. }
  15405. string = toString(string);
  15406. var strLength = string.length;
  15407. if (hasUnicode(string)) {
  15408. var strSymbols = stringToArray(string);
  15409. strLength = strSymbols.length;
  15410. }
  15411. if (length >= strLength) {
  15412. return string;
  15413. }
  15414. var end = length - stringSize(omission);
  15415. if (end < 1) {
  15416. return omission;
  15417. }
  15418. var result = strSymbols
  15419. ? castSlice(strSymbols, 0, end).join('')
  15420. : string.slice(0, end);
  15421. if (separator === undefined) {
  15422. return result + omission;
  15423. }
  15424. if (strSymbols) {
  15425. end += (result.length - end);
  15426. }
  15427. if (isRegExp(separator)) {
  15428. if (string.slice(end).search(separator)) {
  15429. var match,
  15430. substring = result;
  15431. if (!separator.global) {
  15432. separator = RegExp(separator.source, toString(reFlags.exec(separator)) + 'g');
  15433. }
  15434. separator.lastIndex = 0;
  15435. while ((match = separator.exec(substring))) {
  15436. var newEnd = match.index;
  15437. }
  15438. result = result.slice(0, newEnd === undefined ? end : newEnd);
  15439. }
  15440. } else if (string.indexOf(baseToString(separator), end) != end) {
  15441. var index = result.lastIndexOf(separator);
  15442. if (index > -1) {
  15443. result = result.slice(0, index);
  15444. }
  15445. }
  15446. return result + omission;
  15447. }
  15448. /**
  15449. * The inverse of `_.escape`; this method converts the HTML entities
  15450. * `&amp;`, `&lt;`, `&gt;`, `&quot;`, and `&#39;` in `string` to
  15451. * their corresponding characters.
  15452. *
  15453. * **Note:** No other HTML entities are unescaped. To unescape additional
  15454. * HTML entities use a third-party library like [_he_](https://mths.be/he).
  15455. *
  15456. * @static
  15457. * @memberOf _
  15458. * @since 0.6.0
  15459. * @category String
  15460. * @param {string} [string=''] The string to unescape.
  15461. * @returns {string} Returns the unescaped string.
  15462. * @example
  15463. *
  15464. * _.unescape('fred, barney, &amp; pebbles');
  15465. * // => 'fred, barney, & pebbles'
  15466. */
  15467. function unescape(string) {
  15468. string = toString(string);
  15469. return (string && reHasEscapedHtml.test(string))
  15470. ? string.replace(reEscapedHtml, unescapeHtmlChar)
  15471. : string;
  15472. }
  15473. /**
  15474. * Converts `string`, as space separated words, to upper case.
  15475. *
  15476. * @static
  15477. * @memberOf _
  15478. * @since 4.0.0
  15479. * @category String
  15480. * @param {string} [string=''] The string to convert.
  15481. * @returns {string} Returns the upper cased string.
  15482. * @example
  15483. *
  15484. * _.upperCase('--foo-bar');
  15485. * // => 'FOO BAR'
  15486. *
  15487. * _.upperCase('fooBar');
  15488. * // => 'FOO BAR'
  15489. *
  15490. * _.upperCase('__foo_bar__');
  15491. * // => 'FOO BAR'
  15492. */
  15493. var upperCase = createCompounder(function(result, word, index) {
  15494. return result + (index ? ' ' : '') + word.toUpperCase();
  15495. });
  15496. /**
  15497. * Converts the first character of `string` to upper case.
  15498. *
  15499. * @static
  15500. * @memberOf _
  15501. * @since 4.0.0
  15502. * @category String
  15503. * @param {string} [string=''] The string to convert.
  15504. * @returns {string} Returns the converted string.
  15505. * @example
  15506. *
  15507. * _.upperFirst('fred');
  15508. * // => 'Fred'
  15509. *
  15510. * _.upperFirst('FRED');
  15511. * // => 'FRED'
  15512. */
  15513. var upperFirst = createCaseFirst('toUpperCase');
  15514. /**
  15515. * Splits `string` into an array of its words.
  15516. *
  15517. * @static
  15518. * @memberOf _
  15519. * @since 3.0.0
  15520. * @category String
  15521. * @param {string} [string=''] The string to inspect.
  15522. * @param {RegExp|string} [pattern] The pattern to match words.
  15523. * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
  15524. * @returns {Array} Returns the words of `string`.
  15525. * @example
  15526. *
  15527. * _.words('fred, barney, & pebbles');
  15528. * // => ['fred', 'barney', 'pebbles']
  15529. *
  15530. * _.words('fred, barney, & pebbles', /[^, ]+/g);
  15531. * // => ['fred', 'barney', '&', 'pebbles']
  15532. */
  15533. function words(string, pattern, guard) {
  15534. string = toString(string);
  15535. pattern = guard ? undefined : pattern;
  15536. if (pattern === undefined) {
  15537. return hasUnicodeWord(string) ? unicodeWords(string) : asciiWords(string);
  15538. }
  15539. return string.match(pattern) || [];
  15540. }
  15541. /*------------------------------------------------------------------------*/
  15542. /**
  15543. * Attempts to invoke `func`, returning either the result or the caught error
  15544. * object. Any additional arguments are provided to `func` when it's invoked.
  15545. *
  15546. * @static
  15547. * @memberOf _
  15548. * @since 3.0.0
  15549. * @category Util
  15550. * @param {Function} func The function to attempt.
  15551. * @param {...*} [args] The arguments to invoke `func` with.
  15552. * @returns {*} Returns the `func` result or error object.
  15553. * @example
  15554. *
  15555. * // Avoid throwing errors for invalid selectors.
  15556. * var elements = _.attempt(function(selector) {
  15557. * return document.querySelectorAll(selector);
  15558. * }, '>_>');
  15559. *
  15560. * if (_.isError(elements)) {
  15561. * elements = [];
  15562. * }
  15563. */
  15564. var attempt = baseRest(function(func, args) {
  15565. try {
  15566. return apply(func, undefined, args);
  15567. } catch (e) {
  15568. return isError(e) ? e : new Error(e);
  15569. }
  15570. });
  15571. /**
  15572. * Binds methods of an object to the object itself, overwriting the existing
  15573. * method.
  15574. *
  15575. * **Note:** This method doesn't set the "length" property of bound functions.
  15576. *
  15577. * @static
  15578. * @since 0.1.0
  15579. * @memberOf _
  15580. * @category Util
  15581. * @param {Object} object The object to bind and assign the bound methods to.
  15582. * @param {...(string|string[])} methodNames The object method names to bind.
  15583. * @returns {Object} Returns `object`.
  15584. * @example
  15585. *
  15586. * var view = {
  15587. * 'label': 'docs',
  15588. * 'click': function() {
  15589. * console.log('clicked ' + this.label);
  15590. * }
  15591. * };
  15592. *
  15593. * _.bindAll(view, ['click']);
  15594. * jQuery(element).on('click', view.click);
  15595. * // => Logs 'clicked docs' when clicked.
  15596. */
  15597. var bindAll = flatRest(function(object, methodNames) {
  15598. arrayEach(methodNames, function(key) {
  15599. key = toKey(key);
  15600. baseAssignValue(object, key, bind(object[key], object));
  15601. });
  15602. return object;
  15603. });
  15604. /**
  15605. * Creates a function that iterates over `pairs` and invokes the corresponding
  15606. * function of the first predicate to return truthy. The predicate-function
  15607. * pairs are invoked with the `this` binding and arguments of the created
  15608. * function.
  15609. *
  15610. * @static
  15611. * @memberOf _
  15612. * @since 4.0.0
  15613. * @category Util
  15614. * @param {Array} pairs The predicate-function pairs.
  15615. * @returns {Function} Returns the new composite function.
  15616. * @example
  15617. *
  15618. * var func = _.cond([
  15619. * [_.matches({ 'a': 1 }), _.constant('matches A')],
  15620. * [_.conforms({ 'b': _.isNumber }), _.constant('matches B')],
  15621. * [_.stubTrue, _.constant('no match')]
  15622. * ]);
  15623. *
  15624. * func({ 'a': 1, 'b': 2 });
  15625. * // => 'matches A'
  15626. *
  15627. * func({ 'a': 0, 'b': 1 });
  15628. * // => 'matches B'
  15629. *
  15630. * func({ 'a': '1', 'b': '2' });
  15631. * // => 'no match'
  15632. */
  15633. function cond(pairs) {
  15634. var length = pairs == null ? 0 : pairs.length,
  15635. toIteratee = getIteratee();
  15636. pairs = !length ? [] : arrayMap(pairs, function(pair) {
  15637. if (typeof pair[1] != 'function') {
  15638. throw new TypeError(FUNC_ERROR_TEXT);
  15639. }
  15640. return [toIteratee(pair[0]), pair[1]];
  15641. });
  15642. return baseRest(function(args) {
  15643. var index = -1;
  15644. while (++index < length) {
  15645. var pair = pairs[index];
  15646. if (apply(pair[0], this, args)) {
  15647. return apply(pair[1], this, args);
  15648. }
  15649. }
  15650. });
  15651. }
  15652. /**
  15653. * Creates a function that invokes the predicate properties of `source` with
  15654. * the corresponding property values of a given object, returning `true` if
  15655. * all predicates return truthy, else `false`.
  15656. *
  15657. * **Note:** The created function is equivalent to `_.conformsTo` with
  15658. * `source` partially applied.
  15659. *
  15660. * @static
  15661. * @memberOf _
  15662. * @since 4.0.0
  15663. * @category Util
  15664. * @param {Object} source The object of property predicates to conform to.
  15665. * @returns {Function} Returns the new spec function.
  15666. * @example
  15667. *
  15668. * var objects = [
  15669. * { 'a': 2, 'b': 1 },
  15670. * { 'a': 1, 'b': 2 }
  15671. * ];
  15672. *
  15673. * _.filter(objects, _.conforms({ 'b': function(n) { return n > 1; } }));
  15674. * // => [{ 'a': 1, 'b': 2 }]
  15675. */
  15676. function conforms(source) {
  15677. return baseConforms(baseClone(source, CLONE_DEEP_FLAG));
  15678. }
  15679. /**
  15680. * Creates a function that returns `value`.
  15681. *
  15682. * @static
  15683. * @memberOf _
  15684. * @since 2.4.0
  15685. * @category Util
  15686. * @param {*} value The value to return from the new function.
  15687. * @returns {Function} Returns the new constant function.
  15688. * @example
  15689. *
  15690. * var objects = _.times(2, _.constant({ 'a': 1 }));
  15691. *
  15692. * console.log(objects);
  15693. * // => [{ 'a': 1 }, { 'a': 1 }]
  15694. *
  15695. * console.log(objects[0] === objects[1]);
  15696. * // => true
  15697. */
  15698. function constant(value) {
  15699. return function() {
  15700. return value;
  15701. };
  15702. }
  15703. /**
  15704. * Checks `value` to determine whether a default value should be returned in
  15705. * its place. The `defaultValue` is returned if `value` is `NaN`, `null`,
  15706. * or `undefined`.
  15707. *
  15708. * @static
  15709. * @memberOf _
  15710. * @since 4.14.0
  15711. * @category Util
  15712. * @param {*} value The value to check.
  15713. * @param {*} defaultValue The default value.
  15714. * @returns {*} Returns the resolved value.
  15715. * @example
  15716. *
  15717. * _.defaultTo(1, 10);
  15718. * // => 1
  15719. *
  15720. * _.defaultTo(undefined, 10);
  15721. * // => 10
  15722. */
  15723. function defaultTo(value, defaultValue) {
  15724. return (value == null || value !== value) ? defaultValue : value;
  15725. }
  15726. /**
  15727. * Creates a function that returns the result of invoking the given functions
  15728. * with the `this` binding of the created function, where each successive
  15729. * invocation is supplied the return value of the previous.
  15730. *
  15731. * @static
  15732. * @memberOf _
  15733. * @since 3.0.0
  15734. * @category Util
  15735. * @param {...(Function|Function[])} [funcs] The functions to invoke.
  15736. * @returns {Function} Returns the new composite function.
  15737. * @see _.flowRight
  15738. * @example
  15739. *
  15740. * function square(n) {
  15741. * return n * n;
  15742. * }
  15743. *
  15744. * var addSquare = _.flow([_.add, square]);
  15745. * addSquare(1, 2);
  15746. * // => 9
  15747. */
  15748. var flow = createFlow();
  15749. /**
  15750. * This method is like `_.flow` except that it creates a function that
  15751. * invokes the given functions from right to left.
  15752. *
  15753. * @static
  15754. * @since 3.0.0
  15755. * @memberOf _
  15756. * @category Util
  15757. * @param {...(Function|Function[])} [funcs] The functions to invoke.
  15758. * @returns {Function} Returns the new composite function.
  15759. * @see _.flow
  15760. * @example
  15761. *
  15762. * function square(n) {
  15763. * return n * n;
  15764. * }
  15765. *
  15766. * var addSquare = _.flowRight([square, _.add]);
  15767. * addSquare(1, 2);
  15768. * // => 9
  15769. */
  15770. var flowRight = createFlow(true);
  15771. /**
  15772. * This method returns the first argument it receives.
  15773. *
  15774. * @static
  15775. * @since 0.1.0
  15776. * @memberOf _
  15777. * @category Util
  15778. * @param {*} value Any value.
  15779. * @returns {*} Returns `value`.
  15780. * @example
  15781. *
  15782. * var object = { 'a': 1 };
  15783. *
  15784. * console.log(_.identity(object) === object);
  15785. * // => true
  15786. */
  15787. function identity(value) {
  15788. return value;
  15789. }
  15790. /**
  15791. * Creates a function that invokes `func` with the arguments of the created
  15792. * function. If `func` is a property name, the created function returns the
  15793. * property value for a given element. If `func` is an array or object, the
  15794. * created function returns `true` for elements that contain the equivalent
  15795. * source properties, otherwise it returns `false`.
  15796. *
  15797. * @static
  15798. * @since 4.0.0
  15799. * @memberOf _
  15800. * @category Util
  15801. * @param {*} [func=_.identity] The value to convert to a callback.
  15802. * @returns {Function} Returns the callback.
  15803. * @example
  15804. *
  15805. * var users = [
  15806. * { 'user': 'barney', 'age': 36, 'active': true },
  15807. * { 'user': 'fred', 'age': 40, 'active': false }
  15808. * ];
  15809. *
  15810. * // The `_.matches` iteratee shorthand.
  15811. * _.filter(users, _.iteratee({ 'user': 'barney', 'active': true }));
  15812. * // => [{ 'user': 'barney', 'age': 36, 'active': true }]
  15813. *
  15814. * // The `_.matchesProperty` iteratee shorthand.
  15815. * _.filter(users, _.iteratee(['user', 'fred']));
  15816. * // => [{ 'user': 'fred', 'age': 40 }]
  15817. *
  15818. * // The `_.property` iteratee shorthand.
  15819. * _.map(users, _.iteratee('user'));
  15820. * // => ['barney', 'fred']
  15821. *
  15822. * // Create custom iteratee shorthands.
  15823. * _.iteratee = _.wrap(_.iteratee, function(iteratee, func) {
  15824. * return !_.isRegExp(func) ? iteratee(func) : function(string) {
  15825. * return func.test(string);
  15826. * };
  15827. * });
  15828. *
  15829. * _.filter(['abc', 'def'], /ef/);
  15830. * // => ['def']
  15831. */
  15832. function iteratee(func) {
  15833. return baseIteratee(typeof func == 'function' ? func : baseClone(func, CLONE_DEEP_FLAG));
  15834. }
  15835. /**
  15836. * Creates a function that performs a partial deep comparison between a given
  15837. * object and `source`, returning `true` if the given object has equivalent
  15838. * property values, else `false`.
  15839. *
  15840. * **Note:** The created function is equivalent to `_.isMatch` with `source`
  15841. * partially applied.
  15842. *
  15843. * Partial comparisons will match empty array and empty object `source`
  15844. * values against any array or object value, respectively. See `_.isEqual`
  15845. * for a list of supported value comparisons.
  15846. *
  15847. * @static
  15848. * @memberOf _
  15849. * @since 3.0.0
  15850. * @category Util
  15851. * @param {Object} source The object of property values to match.
  15852. * @returns {Function} Returns the new spec function.
  15853. * @example
  15854. *
  15855. * var objects = [
  15856. * { 'a': 1, 'b': 2, 'c': 3 },
  15857. * { 'a': 4, 'b': 5, 'c': 6 }
  15858. * ];
  15859. *
  15860. * _.filter(objects, _.matches({ 'a': 4, 'c': 6 }));
  15861. * // => [{ 'a': 4, 'b': 5, 'c': 6 }]
  15862. */
  15863. function matches(source) {
  15864. return baseMatches(baseClone(source, CLONE_DEEP_FLAG));
  15865. }
  15866. /**
  15867. * Creates a function that performs a partial deep comparison between the
  15868. * value at `path` of a given object to `srcValue`, returning `true` if the
  15869. * object value is equivalent, else `false`.
  15870. *
  15871. * **Note:** Partial comparisons will match empty array and empty object
  15872. * `srcValue` values against any array or object value, respectively. See
  15873. * `_.isEqual` for a list of supported value comparisons.
  15874. *
  15875. * @static
  15876. * @memberOf _
  15877. * @since 3.2.0
  15878. * @category Util
  15879. * @param {Array|string} path The path of the property to get.
  15880. * @param {*} srcValue The value to match.
  15881. * @returns {Function} Returns the new spec function.
  15882. * @example
  15883. *
  15884. * var objects = [
  15885. * { 'a': 1, 'b': 2, 'c': 3 },
  15886. * { 'a': 4, 'b': 5, 'c': 6 }
  15887. * ];
  15888. *
  15889. * _.find(objects, _.matchesProperty('a', 4));
  15890. * // => { 'a': 4, 'b': 5, 'c': 6 }
  15891. */
  15892. function matchesProperty(path, srcValue) {
  15893. return baseMatchesProperty(path, baseClone(srcValue, CLONE_DEEP_FLAG));
  15894. }
  15895. /**
  15896. * Creates a function that invokes the method at `path` of a given object.
  15897. * Any additional arguments are provided to the invoked method.
  15898. *
  15899. * @static
  15900. * @memberOf _
  15901. * @since 3.7.0
  15902. * @category Util
  15903. * @param {Array|string} path The path of the method to invoke.
  15904. * @param {...*} [args] The arguments to invoke the method with.
  15905. * @returns {Function} Returns the new invoker function.
  15906. * @example
  15907. *
  15908. * var objects = [
  15909. * { 'a': { 'b': _.constant(2) } },
  15910. * { 'a': { 'b': _.constant(1) } }
  15911. * ];
  15912. *
  15913. * _.map(objects, _.method('a.b'));
  15914. * // => [2, 1]
  15915. *
  15916. * _.map(objects, _.method(['a', 'b']));
  15917. * // => [2, 1]
  15918. */
  15919. var method = baseRest(function(path, args) {
  15920. return function(object) {
  15921. return baseInvoke(object, path, args);
  15922. };
  15923. });
  15924. /**
  15925. * The opposite of `_.method`; this method creates a function that invokes
  15926. * the method at a given path of `object`. Any additional arguments are
  15927. * provided to the invoked method.
  15928. *
  15929. * @static
  15930. * @memberOf _
  15931. * @since 3.7.0
  15932. * @category Util
  15933. * @param {Object} object The object to query.
  15934. * @param {...*} [args] The arguments to invoke the method with.
  15935. * @returns {Function} Returns the new invoker function.
  15936. * @example
  15937. *
  15938. * var array = _.times(3, _.constant),
  15939. * object = { 'a': array, 'b': array, 'c': array };
  15940. *
  15941. * _.map(['a[2]', 'c[0]'], _.methodOf(object));
  15942. * // => [2, 0]
  15943. *
  15944. * _.map([['a', '2'], ['c', '0']], _.methodOf(object));
  15945. * // => [2, 0]
  15946. */
  15947. var methodOf = baseRest(function(object, args) {
  15948. return function(path) {
  15949. return baseInvoke(object, path, args);
  15950. };
  15951. });
  15952. /**
  15953. * Adds all own enumerable string keyed function properties of a source
  15954. * object to the destination object. If `object` is a function, then methods
  15955. * are added to its prototype as well.
  15956. *
  15957. * **Note:** Use `_.runInContext` to create a pristine `lodash` function to
  15958. * avoid conflicts caused by modifying the original.
  15959. *
  15960. * @static
  15961. * @since 0.1.0
  15962. * @memberOf _
  15963. * @category Util
  15964. * @param {Function|Object} [object=lodash] The destination object.
  15965. * @param {Object} source The object of functions to add.
  15966. * @param {Object} [options={}] The options object.
  15967. * @param {boolean} [options.chain=true] Specify whether mixins are chainable.
  15968. * @returns {Function|Object} Returns `object`.
  15969. * @example
  15970. *
  15971. * function vowels(string) {
  15972. * return _.filter(string, function(v) {
  15973. * return /[aeiou]/i.test(v);
  15974. * });
  15975. * }
  15976. *
  15977. * _.mixin({ 'vowels': vowels });
  15978. * _.vowels('fred');
  15979. * // => ['e']
  15980. *
  15981. * _('fred').vowels().value();
  15982. * // => ['e']
  15983. *
  15984. * _.mixin({ 'vowels': vowels }, { 'chain': false });
  15985. * _('fred').vowels();
  15986. * // => ['e']
  15987. */
  15988. function mixin(object, source, options) {
  15989. var props = keys(source),
  15990. methodNames = baseFunctions(source, props);
  15991. if (options == null &&
  15992. !(isObject(source) && (methodNames.length || !props.length))) {
  15993. options = source;
  15994. source = object;
  15995. object = this;
  15996. methodNames = baseFunctions(source, keys(source));
  15997. }
  15998. var chain = !(isObject(options) && 'chain' in options) || !!options.chain,
  15999. isFunc = isFunction(object);
  16000. arrayEach(methodNames, function(methodName) {
  16001. var func = source[methodName];
  16002. object[methodName] = func;
  16003. if (isFunc) {
  16004. object.prototype[methodName] = function() {
  16005. var chainAll = this.__chain__;
  16006. if (chain || chainAll) {
  16007. var result = object(this.__wrapped__),
  16008. actions = result.__actions__ = copyArray(this.__actions__);
  16009. actions.push({ 'func': func, 'args': arguments, 'thisArg': object });
  16010. result.__chain__ = chainAll;
  16011. return result;
  16012. }
  16013. return func.apply(object, arrayPush([this.value()], arguments));
  16014. };
  16015. }
  16016. });
  16017. return object;
  16018. }
  16019. /**
  16020. * Reverts the `_` variable to its previous value and returns a reference to
  16021. * the `lodash` function.
  16022. *
  16023. * @static
  16024. * @since 0.1.0
  16025. * @memberOf _
  16026. * @category Util
  16027. * @returns {Function} Returns the `lodash` function.
  16028. * @example
  16029. *
  16030. * var lodash = _.noConflict();
  16031. */
  16032. function noConflict() {
  16033. if (root._ === this) {
  16034. root._ = oldDash;
  16035. }
  16036. return this;
  16037. }
  16038. /**
  16039. * This method returns `undefined`.
  16040. *
  16041. * @static
  16042. * @memberOf _
  16043. * @since 2.3.0
  16044. * @category Util
  16045. * @example
  16046. *
  16047. * _.times(2, _.noop);
  16048. * // => [undefined, undefined]
  16049. */
  16050. function noop() {
  16051. // No operation performed.
  16052. }
  16053. /**
  16054. * Creates a function that gets the argument at index `n`. If `n` is negative,
  16055. * the nth argument from the end is returned.
  16056. *
  16057. * @static
  16058. * @memberOf _
  16059. * @since 4.0.0
  16060. * @category Util
  16061. * @param {number} [n=0] The index of the argument to return.
  16062. * @returns {Function} Returns the new pass-thru function.
  16063. * @example
  16064. *
  16065. * var func = _.nthArg(1);
  16066. * func('a', 'b', 'c', 'd');
  16067. * // => 'b'
  16068. *
  16069. * var func = _.nthArg(-2);
  16070. * func('a', 'b', 'c', 'd');
  16071. * // => 'c'
  16072. */
  16073. function nthArg(n) {
  16074. n = toInteger(n);
  16075. return baseRest(function(args) {
  16076. return baseNth(args, n);
  16077. });
  16078. }
  16079. /**
  16080. * Creates a function that invokes `iteratees` with the arguments it receives
  16081. * and returns their results.
  16082. *
  16083. * @static
  16084. * @memberOf _
  16085. * @since 4.0.0
  16086. * @category Util
  16087. * @param {...(Function|Function[])} [iteratees=[_.identity]]
  16088. * The iteratees to invoke.
  16089. * @returns {Function} Returns the new function.
  16090. * @example
  16091. *
  16092. * var func = _.over([Math.max, Math.min]);
  16093. *
  16094. * func(1, 2, 3, 4);
  16095. * // => [4, 1]
  16096. */
  16097. var over = createOver(arrayMap);
  16098. /**
  16099. * Creates a function that checks if **all** of the `predicates` return
  16100. * truthy when invoked with the arguments it receives.
  16101. *
  16102. * @static
  16103. * @memberOf _
  16104. * @since 4.0.0
  16105. * @category Util
  16106. * @param {...(Function|Function[])} [predicates=[_.identity]]
  16107. * The predicates to check.
  16108. * @returns {Function} Returns the new function.
  16109. * @example
  16110. *
  16111. * var func = _.overEvery([Boolean, isFinite]);
  16112. *
  16113. * func('1');
  16114. * // => true
  16115. *
  16116. * func(null);
  16117. * // => false
  16118. *
  16119. * func(NaN);
  16120. * // => false
  16121. */
  16122. var overEvery = createOver(arrayEvery);
  16123. /**
  16124. * Creates a function that checks if **any** of the `predicates` return
  16125. * truthy when invoked with the arguments it receives.
  16126. *
  16127. * @static
  16128. * @memberOf _
  16129. * @since 4.0.0
  16130. * @category Util
  16131. * @param {...(Function|Function[])} [predicates=[_.identity]]
  16132. * The predicates to check.
  16133. * @returns {Function} Returns the new function.
  16134. * @example
  16135. *
  16136. * var func = _.overSome([Boolean, isFinite]);
  16137. *
  16138. * func('1');
  16139. * // => true
  16140. *
  16141. * func(null);
  16142. * // => true
  16143. *
  16144. * func(NaN);
  16145. * // => false
  16146. */
  16147. var overSome = createOver(arraySome);
  16148. /**
  16149. * Creates a function that returns the value at `path` of a given object.
  16150. *
  16151. * @static
  16152. * @memberOf _
  16153. * @since 2.4.0
  16154. * @category Util
  16155. * @param {Array|string} path The path of the property to get.
  16156. * @returns {Function} Returns the new accessor function.
  16157. * @example
  16158. *
  16159. * var objects = [
  16160. * { 'a': { 'b': 2 } },
  16161. * { 'a': { 'b': 1 } }
  16162. * ];
  16163. *
  16164. * _.map(objects, _.property('a.b'));
  16165. * // => [2, 1]
  16166. *
  16167. * _.map(_.sortBy(objects, _.property(['a', 'b'])), 'a.b');
  16168. * // => [1, 2]
  16169. */
  16170. function property(path) {
  16171. return isKey(path) ? baseProperty(toKey(path)) : basePropertyDeep(path);
  16172. }
  16173. /**
  16174. * The opposite of `_.property`; this method creates a function that returns
  16175. * the value at a given path of `object`.
  16176. *
  16177. * @static
  16178. * @memberOf _
  16179. * @since 3.0.0
  16180. * @category Util
  16181. * @param {Object} object The object to query.
  16182. * @returns {Function} Returns the new accessor function.
  16183. * @example
  16184. *
  16185. * var array = [0, 1, 2],
  16186. * object = { 'a': array, 'b': array, 'c': array };
  16187. *
  16188. * _.map(['a[2]', 'c[0]'], _.propertyOf(object));
  16189. * // => [2, 0]
  16190. *
  16191. * _.map([['a', '2'], ['c', '0']], _.propertyOf(object));
  16192. * // => [2, 0]
  16193. */
  16194. function propertyOf(object) {
  16195. return function(path) {
  16196. return object == null ? undefined : baseGet(object, path);
  16197. };
  16198. }
  16199. /**
  16200. * Creates an array of numbers (positive and/or negative) progressing from
  16201. * `start` up to, but not including, `end`. A step of `-1` is used if a negative
  16202. * `start` is specified without an `end` or `step`. If `end` is not specified,
  16203. * it's set to `start` with `start` then set to `0`.
  16204. *
  16205. * **Note:** JavaScript follows the IEEE-754 standard for resolving
  16206. * floating-point values which can produce unexpected results.
  16207. *
  16208. * @static
  16209. * @since 0.1.0
  16210. * @memberOf _
  16211. * @category Util
  16212. * @param {number} [start=0] The start of the range.
  16213. * @param {number} end The end of the range.
  16214. * @param {number} [step=1] The value to increment or decrement by.
  16215. * @returns {Array} Returns the range of numbers.
  16216. * @see _.inRange, _.rangeRight
  16217. * @example
  16218. *
  16219. * _.range(4);
  16220. * // => [0, 1, 2, 3]
  16221. *
  16222. * _.range(-4);
  16223. * // => [0, -1, -2, -3]
  16224. *
  16225. * _.range(1, 5);
  16226. * // => [1, 2, 3, 4]
  16227. *
  16228. * _.range(0, 20, 5);
  16229. * // => [0, 5, 10, 15]
  16230. *
  16231. * _.range(0, -4, -1);
  16232. * // => [0, -1, -2, -3]
  16233. *
  16234. * _.range(1, 4, 0);
  16235. * // => [1, 1, 1]
  16236. *
  16237. * _.range(0);
  16238. * // => []
  16239. */
  16240. var range = createRange();
  16241. /**
  16242. * This method is like `_.range` except that it populates values in
  16243. * descending order.
  16244. *
  16245. * @static
  16246. * @memberOf _
  16247. * @since 4.0.0
  16248. * @category Util
  16249. * @param {number} [start=0] The start of the range.
  16250. * @param {number} end The end of the range.
  16251. * @param {number} [step=1] The value to increment or decrement by.
  16252. * @returns {Array} Returns the range of numbers.
  16253. * @see _.inRange, _.range
  16254. * @example
  16255. *
  16256. * _.rangeRight(4);
  16257. * // => [3, 2, 1, 0]
  16258. *
  16259. * _.rangeRight(-4);
  16260. * // => [-3, -2, -1, 0]
  16261. *
  16262. * _.rangeRight(1, 5);
  16263. * // => [4, 3, 2, 1]
  16264. *
  16265. * _.rangeRight(0, 20, 5);
  16266. * // => [15, 10, 5, 0]
  16267. *
  16268. * _.rangeRight(0, -4, -1);
  16269. * // => [-3, -2, -1, 0]
  16270. *
  16271. * _.rangeRight(1, 4, 0);
  16272. * // => [1, 1, 1]
  16273. *
  16274. * _.rangeRight(0);
  16275. * // => []
  16276. */
  16277. var rangeRight = createRange(true);
  16278. /**
  16279. * This method returns a new empty array.
  16280. *
  16281. * @static
  16282. * @memberOf _
  16283. * @since 4.13.0
  16284. * @category Util
  16285. * @returns {Array} Returns the new empty array.
  16286. * @example
  16287. *
  16288. * var arrays = _.times(2, _.stubArray);
  16289. *
  16290. * console.log(arrays);
  16291. * // => [[], []]
  16292. *
  16293. * console.log(arrays[0] === arrays[1]);
  16294. * // => false
  16295. */
  16296. function stubArray() {
  16297. return [];
  16298. }
  16299. /**
  16300. * This method returns `false`.
  16301. *
  16302. * @static
  16303. * @memberOf _
  16304. * @since 4.13.0
  16305. * @category Util
  16306. * @returns {boolean} Returns `false`.
  16307. * @example
  16308. *
  16309. * _.times(2, _.stubFalse);
  16310. * // => [false, false]
  16311. */
  16312. function stubFalse() {
  16313. return false;
  16314. }
  16315. /**
  16316. * This method returns a new empty object.
  16317. *
  16318. * @static
  16319. * @memberOf _
  16320. * @since 4.13.0
  16321. * @category Util
  16322. * @returns {Object} Returns the new empty object.
  16323. * @example
  16324. *
  16325. * var objects = _.times(2, _.stubObject);
  16326. *
  16327. * console.log(objects);
  16328. * // => [{}, {}]
  16329. *
  16330. * console.log(objects[0] === objects[1]);
  16331. * // => false
  16332. */
  16333. function stubObject() {
  16334. return {};
  16335. }
  16336. /**
  16337. * This method returns an empty string.
  16338. *
  16339. * @static
  16340. * @memberOf _
  16341. * @since 4.13.0
  16342. * @category Util
  16343. * @returns {string} Returns the empty string.
  16344. * @example
  16345. *
  16346. * _.times(2, _.stubString);
  16347. * // => ['', '']
  16348. */
  16349. function stubString() {
  16350. return '';
  16351. }
  16352. /**
  16353. * This method returns `true`.
  16354. *
  16355. * @static
  16356. * @memberOf _
  16357. * @since 4.13.0
  16358. * @category Util
  16359. * @returns {boolean} Returns `true`.
  16360. * @example
  16361. *
  16362. * _.times(2, _.stubTrue);
  16363. * // => [true, true]
  16364. */
  16365. function stubTrue() {
  16366. return true;
  16367. }
  16368. /**
  16369. * Invokes the iteratee `n` times, returning an array of the results of
  16370. * each invocation. The iteratee is invoked with one argument; (index).
  16371. *
  16372. * @static
  16373. * @since 0.1.0
  16374. * @memberOf _
  16375. * @category Util
  16376. * @param {number} n The number of times to invoke `iteratee`.
  16377. * @param {Function} [iteratee=_.identity] The function invoked per iteration.
  16378. * @returns {Array} Returns the array of results.
  16379. * @example
  16380. *
  16381. * _.times(3, String);
  16382. * // => ['0', '1', '2']
  16383. *
  16384. * _.times(4, _.constant(0));
  16385. * // => [0, 0, 0, 0]
  16386. */
  16387. function times(n, iteratee) {
  16388. n = toInteger(n);
  16389. if (n < 1 || n > MAX_SAFE_INTEGER) {
  16390. return [];
  16391. }
  16392. var index = MAX_ARRAY_LENGTH,
  16393. length = nativeMin(n, MAX_ARRAY_LENGTH);
  16394. iteratee = getIteratee(iteratee);
  16395. n -= MAX_ARRAY_LENGTH;
  16396. var result = baseTimes(length, iteratee);
  16397. while (++index < n) {
  16398. iteratee(index);
  16399. }
  16400. return result;
  16401. }
  16402. /**
  16403. * Converts `value` to a property path array.
  16404. *
  16405. * @static
  16406. * @memberOf _
  16407. * @since 4.0.0
  16408. * @category Util
  16409. * @param {*} value The value to convert.
  16410. * @returns {Array} Returns the new property path array.
  16411. * @example
  16412. *
  16413. * _.toPath('a.b.c');
  16414. * // => ['a', 'b', 'c']
  16415. *
  16416. * _.toPath('a[0].b.c');
  16417. * // => ['a', '0', 'b', 'c']
  16418. */
  16419. function toPath(value) {
  16420. if (isArray(value)) {
  16421. return arrayMap(value, toKey);
  16422. }
  16423. return isSymbol(value) ? [value] : copyArray(stringToPath(toString(value)));
  16424. }
  16425. /**
  16426. * Generates a unique ID. If `prefix` is given, the ID is appended to it.
  16427. *
  16428. * @static
  16429. * @since 0.1.0
  16430. * @memberOf _
  16431. * @category Util
  16432. * @param {string} [prefix=''] The value to prefix the ID with.
  16433. * @returns {string} Returns the unique ID.
  16434. * @example
  16435. *
  16436. * _.uniqueId('contact_');
  16437. * // => 'contact_104'
  16438. *
  16439. * _.uniqueId();
  16440. * // => '105'
  16441. */
  16442. function uniqueId(prefix) {
  16443. var id = ++idCounter;
  16444. return toString(prefix) + id;
  16445. }
  16446. /*------------------------------------------------------------------------*/
  16447. /**
  16448. * Adds two numbers.
  16449. *
  16450. * @static
  16451. * @memberOf _
  16452. * @since 3.4.0
  16453. * @category Math
  16454. * @param {number} augend The first number in an addition.
  16455. * @param {number} addend The second number in an addition.
  16456. * @returns {number} Returns the total.
  16457. * @example
  16458. *
  16459. * _.add(6, 4);
  16460. * // => 10
  16461. */
  16462. var add = createMathOperation(function(augend, addend) {
  16463. return augend + addend;
  16464. }, 0);
  16465. /**
  16466. * Computes `number` rounded up to `precision`.
  16467. *
  16468. * @static
  16469. * @memberOf _
  16470. * @since 3.10.0
  16471. * @category Math
  16472. * @param {number} number The number to round up.
  16473. * @param {number} [precision=0] The precision to round up to.
  16474. * @returns {number} Returns the rounded up number.
  16475. * @example
  16476. *
  16477. * _.ceil(4.006);
  16478. * // => 5
  16479. *
  16480. * _.ceil(6.004, 2);
  16481. * // => 6.01
  16482. *
  16483. * _.ceil(6040, -2);
  16484. * // => 6100
  16485. */
  16486. var ceil = createRound('ceil');
  16487. /**
  16488. * Divide two numbers.
  16489. *
  16490. * @static
  16491. * @memberOf _
  16492. * @since 4.7.0
  16493. * @category Math
  16494. * @param {number} dividend The first number in a division.
  16495. * @param {number} divisor The second number in a division.
  16496. * @returns {number} Returns the quotient.
  16497. * @example
  16498. *
  16499. * _.divide(6, 4);
  16500. * // => 1.5
  16501. */
  16502. var divide = createMathOperation(function(dividend, divisor) {
  16503. return dividend / divisor;
  16504. }, 1);
  16505. /**
  16506. * Computes `number` rounded down to `precision`.
  16507. *
  16508. * @static
  16509. * @memberOf _
  16510. * @since 3.10.0
  16511. * @category Math
  16512. * @param {number} number The number to round down.
  16513. * @param {number} [precision=0] The precision to round down to.
  16514. * @returns {number} Returns the rounded down number.
  16515. * @example
  16516. *
  16517. * _.floor(4.006);
  16518. * // => 4
  16519. *
  16520. * _.floor(0.046, 2);
  16521. * // => 0.04
  16522. *
  16523. * _.floor(4060, -2);
  16524. * // => 4000
  16525. */
  16526. var floor = createRound('floor');
  16527. /**
  16528. * Computes the maximum value of `array`. If `array` is empty or falsey,
  16529. * `undefined` is returned.
  16530. *
  16531. * @static
  16532. * @since 0.1.0
  16533. * @memberOf _
  16534. * @category Math
  16535. * @param {Array} array The array to iterate over.
  16536. * @returns {*} Returns the maximum value.
  16537. * @example
  16538. *
  16539. * _.max([4, 2, 8, 6]);
  16540. * // => 8
  16541. *
  16542. * _.max([]);
  16543. * // => undefined
  16544. */
  16545. function max(array) {
  16546. return (array && array.length)
  16547. ? baseExtremum(array, identity, baseGt)
  16548. : undefined;
  16549. }
  16550. /**
  16551. * This method is like `_.max` except that it accepts `iteratee` which is
  16552. * invoked for each element in `array` to generate the criterion by which
  16553. * the value is ranked. The iteratee is invoked with one argument: (value).
  16554. *
  16555. * @static
  16556. * @memberOf _
  16557. * @since 4.0.0
  16558. * @category Math
  16559. * @param {Array} array The array to iterate over.
  16560. * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
  16561. * @returns {*} Returns the maximum value.
  16562. * @example
  16563. *
  16564. * var objects = [{ 'n': 1 }, { 'n': 2 }];
  16565. *
  16566. * _.maxBy(objects, function(o) { return o.n; });
  16567. * // => { 'n': 2 }
  16568. *
  16569. * // The `_.property` iteratee shorthand.
  16570. * _.maxBy(objects, 'n');
  16571. * // => { 'n': 2 }
  16572. */
  16573. function maxBy(array, iteratee) {
  16574. return (array && array.length)
  16575. ? baseExtremum(array, getIteratee(iteratee, 2), baseGt)
  16576. : undefined;
  16577. }
  16578. /**
  16579. * Computes the mean of the values in `array`.
  16580. *
  16581. * @static
  16582. * @memberOf _
  16583. * @since 4.0.0
  16584. * @category Math
  16585. * @param {Array} array The array to iterate over.
  16586. * @returns {number} Returns the mean.
  16587. * @example
  16588. *
  16589. * _.mean([4, 2, 8, 6]);
  16590. * // => 5
  16591. */
  16592. function mean(array) {
  16593. return baseMean(array, identity);
  16594. }
  16595. /**
  16596. * This method is like `_.mean` except that it accepts `iteratee` which is
  16597. * invoked for each element in `array` to generate the value to be averaged.
  16598. * The iteratee is invoked with one argument: (value).
  16599. *
  16600. * @static
  16601. * @memberOf _
  16602. * @since 4.7.0
  16603. * @category Math
  16604. * @param {Array} array The array to iterate over.
  16605. * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
  16606. * @returns {number} Returns the mean.
  16607. * @example
  16608. *
  16609. * var objects = [{ 'n': 4 }, { 'n': 2 }, { 'n': 8 }, { 'n': 6 }];
  16610. *
  16611. * _.meanBy(objects, function(o) { return o.n; });
  16612. * // => 5
  16613. *
  16614. * // The `_.property` iteratee shorthand.
  16615. * _.meanBy(objects, 'n');
  16616. * // => 5
  16617. */
  16618. function meanBy(array, iteratee) {
  16619. return baseMean(array, getIteratee(iteratee, 2));
  16620. }
  16621. /**
  16622. * Computes the minimum value of `array`. If `array` is empty or falsey,
  16623. * `undefined` is returned.
  16624. *
  16625. * @static
  16626. * @since 0.1.0
  16627. * @memberOf _
  16628. * @category Math
  16629. * @param {Array} array The array to iterate over.
  16630. * @returns {*} Returns the minimum value.
  16631. * @example
  16632. *
  16633. * _.min([4, 2, 8, 6]);
  16634. * // => 2
  16635. *
  16636. * _.min([]);
  16637. * // => undefined
  16638. */
  16639. function min(array) {
  16640. return (array && array.length)
  16641. ? baseExtremum(array, identity, baseLt)
  16642. : undefined;
  16643. }
  16644. /**
  16645. * This method is like `_.min` except that it accepts `iteratee` which is
  16646. * invoked for each element in `array` to generate the criterion by which
  16647. * the value is ranked. The iteratee is invoked with one argument: (value).
  16648. *
  16649. * @static
  16650. * @memberOf _
  16651. * @since 4.0.0
  16652. * @category Math
  16653. * @param {Array} array The array to iterate over.
  16654. * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
  16655. * @returns {*} Returns the minimum value.
  16656. * @example
  16657. *
  16658. * var objects = [{ 'n': 1 }, { 'n': 2 }];
  16659. *
  16660. * _.minBy(objects, function(o) { return o.n; });
  16661. * // => { 'n': 1 }
  16662. *
  16663. * // The `_.property` iteratee shorthand.
  16664. * _.minBy(objects, 'n');
  16665. * // => { 'n': 1 }
  16666. */
  16667. function minBy(array, iteratee) {
  16668. return (array && array.length)
  16669. ? baseExtremum(array, getIteratee(iteratee, 2), baseLt)
  16670. : undefined;
  16671. }
  16672. /**
  16673. * Multiply two numbers.
  16674. *
  16675. * @static
  16676. * @memberOf _
  16677. * @since 4.7.0
  16678. * @category Math
  16679. * @param {number} multiplier The first number in a multiplication.
  16680. * @param {number} multiplicand The second number in a multiplication.
  16681. * @returns {number} Returns the product.
  16682. * @example
  16683. *
  16684. * _.multiply(6, 4);
  16685. * // => 24
  16686. */
  16687. var multiply = createMathOperation(function(multiplier, multiplicand) {
  16688. return multiplier * multiplicand;
  16689. }, 1);
  16690. /**
  16691. * Computes `number` rounded to `precision`.
  16692. *
  16693. * @static
  16694. * @memberOf _
  16695. * @since 3.10.0
  16696. * @category Math
  16697. * @param {number} number The number to round.
  16698. * @param {number} [precision=0] The precision to round to.
  16699. * @returns {number} Returns the rounded number.
  16700. * @example
  16701. *
  16702. * _.round(4.006);
  16703. * // => 4
  16704. *
  16705. * _.round(4.006, 2);
  16706. * // => 4.01
  16707. *
  16708. * _.round(4060, -2);
  16709. * // => 4100
  16710. */
  16711. var round = createRound('round');
  16712. /**
  16713. * Subtract two numbers.
  16714. *
  16715. * @static
  16716. * @memberOf _
  16717. * @since 4.0.0
  16718. * @category Math
  16719. * @param {number} minuend The first number in a subtraction.
  16720. * @param {number} subtrahend The second number in a subtraction.
  16721. * @returns {number} Returns the difference.
  16722. * @example
  16723. *
  16724. * _.subtract(6, 4);
  16725. * // => 2
  16726. */
  16727. var subtract = createMathOperation(function(minuend, subtrahend) {
  16728. return minuend - subtrahend;
  16729. }, 0);
  16730. /**
  16731. * Computes the sum of the values in `array`.
  16732. *
  16733. * @static
  16734. * @memberOf _
  16735. * @since 3.4.0
  16736. * @category Math
  16737. * @param {Array} array The array to iterate over.
  16738. * @returns {number} Returns the sum.
  16739. * @example
  16740. *
  16741. * _.sum([4, 2, 8, 6]);
  16742. * // => 20
  16743. */
  16744. function sum(array) {
  16745. return (array && array.length)
  16746. ? baseSum(array, identity)
  16747. : 0;
  16748. }
  16749. /**
  16750. * This method is like `_.sum` except that it accepts `iteratee` which is
  16751. * invoked for each element in `array` to generate the value to be summed.
  16752. * The iteratee is invoked with one argument: (value).
  16753. *
  16754. * @static
  16755. * @memberOf _
  16756. * @since 4.0.0
  16757. * @category Math
  16758. * @param {Array} array The array to iterate over.
  16759. * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
  16760. * @returns {number} Returns the sum.
  16761. * @example
  16762. *
  16763. * var objects = [{ 'n': 4 }, { 'n': 2 }, { 'n': 8 }, { 'n': 6 }];
  16764. *
  16765. * _.sumBy(objects, function(o) { return o.n; });
  16766. * // => 20
  16767. *
  16768. * // The `_.property` iteratee shorthand.
  16769. * _.sumBy(objects, 'n');
  16770. * // => 20
  16771. */
  16772. function sumBy(array, iteratee) {
  16773. return (array && array.length)
  16774. ? baseSum(array, getIteratee(iteratee, 2))
  16775. : 0;
  16776. }
  16777. /*------------------------------------------------------------------------*/
  16778. // Add methods that return wrapped values in chain sequences.
  16779. lodash.after = after;
  16780. lodash.ary = ary;
  16781. lodash.assign = assign;
  16782. lodash.assignIn = assignIn;
  16783. lodash.assignInWith = assignInWith;
  16784. lodash.assignWith = assignWith;
  16785. lodash.at = at;
  16786. lodash.before = before;
  16787. lodash.bind = bind;
  16788. lodash.bindAll = bindAll;
  16789. lodash.bindKey = bindKey;
  16790. lodash.castArray = castArray;
  16791. lodash.chain = chain;
  16792. lodash.chunk = chunk;
  16793. lodash.compact = compact;
  16794. lodash.concat = concat;
  16795. lodash.cond = cond;
  16796. lodash.conforms = conforms;
  16797. lodash.constant = constant;
  16798. lodash.countBy = countBy;
  16799. lodash.create = create;
  16800. lodash.curry = curry;
  16801. lodash.curryRight = curryRight;
  16802. lodash.debounce = debounce;
  16803. lodash.defaults = defaults;
  16804. lodash.defaultsDeep = defaultsDeep;
  16805. lodash.defer = defer;
  16806. lodash.delay = delay;
  16807. lodash.difference = difference;
  16808. lodash.differenceBy = differenceBy;
  16809. lodash.differenceWith = differenceWith;
  16810. lodash.drop = drop;
  16811. lodash.dropRight = dropRight;
  16812. lodash.dropRightWhile = dropRightWhile;
  16813. lodash.dropWhile = dropWhile;
  16814. lodash.fill = fill;
  16815. lodash.filter = filter;
  16816. lodash.flatMap = flatMap;
  16817. lodash.flatMapDeep = flatMapDeep;
  16818. lodash.flatMapDepth = flatMapDepth;
  16819. lodash.flatten = flatten;
  16820. lodash.flattenDeep = flattenDeep;
  16821. lodash.flattenDepth = flattenDepth;
  16822. lodash.flip = flip;
  16823. lodash.flow = flow;
  16824. lodash.flowRight = flowRight;
  16825. lodash.fromPairs = fromPairs;
  16826. lodash.functions = functions;
  16827. lodash.functionsIn = functionsIn;
  16828. lodash.groupBy = groupBy;
  16829. lodash.initial = initial;
  16830. lodash.intersection = intersection;
  16831. lodash.intersectionBy = intersectionBy;
  16832. lodash.intersectionWith = intersectionWith;
  16833. lodash.invert = invert;
  16834. lodash.invertBy = invertBy;
  16835. lodash.invokeMap = invokeMap;
  16836. lodash.iteratee = iteratee;
  16837. lodash.keyBy = keyBy;
  16838. lodash.keys = keys;
  16839. lodash.keysIn = keysIn;
  16840. lodash.map = map;
  16841. lodash.mapKeys = mapKeys;
  16842. lodash.mapValues = mapValues;
  16843. lodash.matches = matches;
  16844. lodash.matchesProperty = matchesProperty;
  16845. lodash.memoize = memoize;
  16846. lodash.merge = merge;
  16847. lodash.mergeWith = mergeWith;
  16848. lodash.method = method;
  16849. lodash.methodOf = methodOf;
  16850. lodash.mixin = mixin;
  16851. lodash.negate = negate;
  16852. lodash.nthArg = nthArg;
  16853. lodash.omit = omit;
  16854. lodash.omitBy = omitBy;
  16855. lodash.once = once;
  16856. lodash.orderBy = orderBy;
  16857. lodash.over = over;
  16858. lodash.overArgs = overArgs;
  16859. lodash.overEvery = overEvery;
  16860. lodash.overSome = overSome;
  16861. lodash.partial = partial;
  16862. lodash.partialRight = partialRight;
  16863. lodash.partition = partition;
  16864. lodash.pick = pick;
  16865. lodash.pickBy = pickBy;
  16866. lodash.property = property;
  16867. lodash.propertyOf = propertyOf;
  16868. lodash.pull = pull;
  16869. lodash.pullAll = pullAll;
  16870. lodash.pullAllBy = pullAllBy;
  16871. lodash.pullAllWith = pullAllWith;
  16872. lodash.pullAt = pullAt;
  16873. lodash.range = range;
  16874. lodash.rangeRight = rangeRight;
  16875. lodash.rearg = rearg;
  16876. lodash.reject = reject;
  16877. lodash.remove = remove;
  16878. lodash.rest = rest;
  16879. lodash.reverse = reverse;
  16880. lodash.sampleSize = sampleSize;
  16881. lodash.set = set;
  16882. lodash.setWith = setWith;
  16883. lodash.shuffle = shuffle;
  16884. lodash.slice = slice;
  16885. lodash.sortBy = sortBy;
  16886. lodash.sortedUniq = sortedUniq;
  16887. lodash.sortedUniqBy = sortedUniqBy;
  16888. lodash.split = split;
  16889. lodash.spread = spread;
  16890. lodash.tail = tail;
  16891. lodash.take = take;
  16892. lodash.takeRight = takeRight;
  16893. lodash.takeRightWhile = takeRightWhile;
  16894. lodash.takeWhile = takeWhile;
  16895. lodash.tap = tap;
  16896. lodash.throttle = throttle;
  16897. lodash.thru = thru;
  16898. lodash.toArray = toArray;
  16899. lodash.toPairs = toPairs;
  16900. lodash.toPairsIn = toPairsIn;
  16901. lodash.toPath = toPath;
  16902. lodash.toPlainObject = toPlainObject;
  16903. lodash.transform = transform;
  16904. lodash.unary = unary;
  16905. lodash.union = union;
  16906. lodash.unionBy = unionBy;
  16907. lodash.unionWith = unionWith;
  16908. lodash.uniq = uniq;
  16909. lodash.uniqBy = uniqBy;
  16910. lodash.uniqWith = uniqWith;
  16911. lodash.unset = unset;
  16912. lodash.unzip = unzip;
  16913. lodash.unzipWith = unzipWith;
  16914. lodash.update = update;
  16915. lodash.updateWith = updateWith;
  16916. lodash.values = values;
  16917. lodash.valuesIn = valuesIn;
  16918. lodash.without = without;
  16919. lodash.words = words;
  16920. lodash.wrap = wrap;
  16921. lodash.xor = xor;
  16922. lodash.xorBy = xorBy;
  16923. lodash.xorWith = xorWith;
  16924. lodash.zip = zip;
  16925. lodash.zipObject = zipObject;
  16926. lodash.zipObjectDeep = zipObjectDeep;
  16927. lodash.zipWith = zipWith;
  16928. // Add aliases.
  16929. lodash.entries = toPairs;
  16930. lodash.entriesIn = toPairsIn;
  16931. lodash.extend = assignIn;
  16932. lodash.extendWith = assignInWith;
  16933. // Add methods to `lodash.prototype`.
  16934. mixin(lodash, lodash);
  16935. /*------------------------------------------------------------------------*/
  16936. // Add methods that return unwrapped values in chain sequences.
  16937. lodash.add = add;
  16938. lodash.attempt = attempt;
  16939. lodash.camelCase = camelCase;
  16940. lodash.capitalize = capitalize;
  16941. lodash.ceil = ceil;
  16942. lodash.clamp = clamp;
  16943. lodash.clone = clone;
  16944. lodash.cloneDeep = cloneDeep;
  16945. lodash.cloneDeepWith = cloneDeepWith;
  16946. lodash.cloneWith = cloneWith;
  16947. lodash.conformsTo = conformsTo;
  16948. lodash.deburr = deburr;
  16949. lodash.defaultTo = defaultTo;
  16950. lodash.divide = divide;
  16951. lodash.endsWith = endsWith;
  16952. lodash.eq = eq;
  16953. lodash.escape = escape;
  16954. lodash.escapeRegExp = escapeRegExp;
  16955. lodash.every = every;
  16956. lodash.find = find;
  16957. lodash.findIndex = findIndex;
  16958. lodash.findKey = findKey;
  16959. lodash.findLast = findLast;
  16960. lodash.findLastIndex = findLastIndex;
  16961. lodash.findLastKey = findLastKey;
  16962. lodash.floor = floor;
  16963. lodash.forEach = forEach;
  16964. lodash.forEachRight = forEachRight;
  16965. lodash.forIn = forIn;
  16966. lodash.forInRight = forInRight;
  16967. lodash.forOwn = forOwn;
  16968. lodash.forOwnRight = forOwnRight;
  16969. lodash.get = get;
  16970. lodash.gt = gt;
  16971. lodash.gte = gte;
  16972. lodash.has = has;
  16973. lodash.hasIn = hasIn;
  16974. lodash.head = head;
  16975. lodash.identity = identity;
  16976. lodash.includes = includes;
  16977. lodash.indexOf = indexOf;
  16978. lodash.inRange = inRange;
  16979. lodash.invoke = invoke;
  16980. lodash.isArguments = isArguments;
  16981. lodash.isArray = isArray;
  16982. lodash.isArrayBuffer = isArrayBuffer;
  16983. lodash.isArrayLike = isArrayLike;
  16984. lodash.isArrayLikeObject = isArrayLikeObject;
  16985. lodash.isBoolean = isBoolean;
  16986. lodash.isBuffer = isBuffer;
  16987. lodash.isDate = isDate;
  16988. lodash.isElement = isElement;
  16989. lodash.isEmpty = isEmpty;
  16990. lodash.isEqual = isEqual;
  16991. lodash.isEqualWith = isEqualWith;
  16992. lodash.isError = isError;
  16993. lodash.isFinite = isFinite;
  16994. lodash.isFunction = isFunction;
  16995. lodash.isInteger = isInteger;
  16996. lodash.isLength = isLength;
  16997. lodash.isMap = isMap;
  16998. lodash.isMatch = isMatch;
  16999. lodash.isMatchWith = isMatchWith;
  17000. lodash.isNaN = isNaN;
  17001. lodash.isNative = isNative;
  17002. lodash.isNil = isNil;
  17003. lodash.isNull = isNull;
  17004. lodash.isNumber = isNumber;
  17005. lodash.isObject = isObject;
  17006. lodash.isObjectLike = isObjectLike;
  17007. lodash.isPlainObject = isPlainObject;
  17008. lodash.isRegExp = isRegExp;
  17009. lodash.isSafeInteger = isSafeInteger;
  17010. lodash.isSet = isSet;
  17011. lodash.isString = isString;
  17012. lodash.isSymbol = isSymbol;
  17013. lodash.isTypedArray = isTypedArray;
  17014. lodash.isUndefined = isUndefined;
  17015. lodash.isWeakMap = isWeakMap;
  17016. lodash.isWeakSet = isWeakSet;
  17017. lodash.join = join;
  17018. lodash.kebabCase = kebabCase;
  17019. lodash.last = last;
  17020. lodash.lastIndexOf = lastIndexOf;
  17021. lodash.lowerCase = lowerCase;
  17022. lodash.lowerFirst = lowerFirst;
  17023. lodash.lt = lt;
  17024. lodash.lte = lte;
  17025. lodash.max = max;
  17026. lodash.maxBy = maxBy;
  17027. lodash.mean = mean;
  17028. lodash.meanBy = meanBy;
  17029. lodash.min = min;
  17030. lodash.minBy = minBy;
  17031. lodash.stubArray = stubArray;
  17032. lodash.stubFalse = stubFalse;
  17033. lodash.stubObject = stubObject;
  17034. lodash.stubString = stubString;
  17035. lodash.stubTrue = stubTrue;
  17036. lodash.multiply = multiply;
  17037. lodash.nth = nth;
  17038. lodash.noConflict = noConflict;
  17039. lodash.noop = noop;
  17040. lodash.now = now;
  17041. lodash.pad = pad;
  17042. lodash.padEnd = padEnd;
  17043. lodash.padStart = padStart;
  17044. lodash.parseInt = parseInt;
  17045. lodash.random = random;
  17046. lodash.reduce = reduce;
  17047. lodash.reduceRight = reduceRight;
  17048. lodash.repeat = repeat;
  17049. lodash.replace = replace;
  17050. lodash.result = result;
  17051. lodash.round = round;
  17052. lodash.runInContext = runInContext;
  17053. lodash.sample = sample;
  17054. lodash.size = size;
  17055. lodash.snakeCase = snakeCase;
  17056. lodash.some = some;
  17057. lodash.sortedIndex = sortedIndex;
  17058. lodash.sortedIndexBy = sortedIndexBy;
  17059. lodash.sortedIndexOf = sortedIndexOf;
  17060. lodash.sortedLastIndex = sortedLastIndex;
  17061. lodash.sortedLastIndexBy = sortedLastIndexBy;
  17062. lodash.sortedLastIndexOf = sortedLastIndexOf;
  17063. lodash.startCase = startCase;
  17064. lodash.startsWith = startsWith;
  17065. lodash.subtract = subtract;
  17066. lodash.sum = sum;
  17067. lodash.sumBy = sumBy;
  17068. lodash.template = template;
  17069. lodash.times = times;
  17070. lodash.toFinite = toFinite;
  17071. lodash.toInteger = toInteger;
  17072. lodash.toLength = toLength;
  17073. lodash.toLower = toLower;
  17074. lodash.toNumber = toNumber;
  17075. lodash.toSafeInteger = toSafeInteger;
  17076. lodash.toString = toString;
  17077. lodash.toUpper = toUpper;
  17078. lodash.trim = trim;
  17079. lodash.trimEnd = trimEnd;
  17080. lodash.trimStart = trimStart;
  17081. lodash.truncate = truncate;
  17082. lodash.unescape = unescape;
  17083. lodash.uniqueId = uniqueId;
  17084. lodash.upperCase = upperCase;
  17085. lodash.upperFirst = upperFirst;
  17086. // Add aliases.
  17087. lodash.each = forEach;
  17088. lodash.eachRight = forEachRight;
  17089. lodash.first = head;
  17090. mixin(lodash, (function() {
  17091. var source = {};
  17092. baseForOwn(lodash, function(func, methodName) {
  17093. if (!hasOwnProperty.call(lodash.prototype, methodName)) {
  17094. source[methodName] = func;
  17095. }
  17096. });
  17097. return source;
  17098. }()), { 'chain': false });
  17099. /*------------------------------------------------------------------------*/
  17100. /**
  17101. * The semantic version number.
  17102. *
  17103. * @static
  17104. * @memberOf _
  17105. * @type {string}
  17106. */
  17107. lodash.VERSION = VERSION;
  17108. // Assign default placeholders.
  17109. arrayEach(['bind', 'bindKey', 'curry', 'curryRight', 'partial', 'partialRight'], function(methodName) {
  17110. lodash[methodName].placeholder = lodash;
  17111. });
  17112. // Add `LazyWrapper` methods for `_.drop` and `_.take` variants.
  17113. arrayEach(['drop', 'take'], function(methodName, index) {
  17114. LazyWrapper.prototype[methodName] = function(n) {
  17115. n = n === undefined ? 1 : nativeMax(toInteger(n), 0);
  17116. var result = (this.__filtered__ && !index)
  17117. ? new LazyWrapper(this)
  17118. : this.clone();
  17119. if (result.__filtered__) {
  17120. result.__takeCount__ = nativeMin(n, result.__takeCount__);
  17121. } else {
  17122. result.__views__.push({
  17123. 'size': nativeMin(n, MAX_ARRAY_LENGTH),
  17124. 'type': methodName + (result.__dir__ < 0 ? 'Right' : '')
  17125. });
  17126. }
  17127. return result;
  17128. };
  17129. LazyWrapper.prototype[methodName + 'Right'] = function(n) {
  17130. return this.reverse()[methodName](n).reverse();
  17131. };
  17132. });
  17133. // Add `LazyWrapper` methods that accept an `iteratee` value.
  17134. arrayEach(['filter', 'map', 'takeWhile'], function(methodName, index) {
  17135. var type = index + 1,
  17136. isFilter = type == LAZY_FILTER_FLAG || type == LAZY_WHILE_FLAG;
  17137. LazyWrapper.prototype[methodName] = function(iteratee) {
  17138. var result = this.clone();
  17139. result.__iteratees__.push({
  17140. 'iteratee': getIteratee(iteratee, 3),
  17141. 'type': type
  17142. });
  17143. result.__filtered__ = result.__filtered__ || isFilter;
  17144. return result;
  17145. };
  17146. });
  17147. // Add `LazyWrapper` methods for `_.head` and `_.last`.
  17148. arrayEach(['head', 'last'], function(methodName, index) {
  17149. var takeName = 'take' + (index ? 'Right' : '');
  17150. LazyWrapper.prototype[methodName] = function() {
  17151. return this[takeName](1).value()[0];
  17152. };
  17153. });
  17154. // Add `LazyWrapper` methods for `_.initial` and `_.tail`.
  17155. arrayEach(['initial', 'tail'], function(methodName, index) {
  17156. var dropName = 'drop' + (index ? '' : 'Right');
  17157. LazyWrapper.prototype[methodName] = function() {
  17158. return this.__filtered__ ? new LazyWrapper(this) : this[dropName](1);
  17159. };
  17160. });
  17161. LazyWrapper.prototype.compact = function() {
  17162. return this.filter(identity);
  17163. };
  17164. LazyWrapper.prototype.find = function(predicate) {
  17165. return this.filter(predicate).head();
  17166. };
  17167. LazyWrapper.prototype.findLast = function(predicate) {
  17168. return this.reverse().find(predicate);
  17169. };
  17170. LazyWrapper.prototype.invokeMap = baseRest(function(path, args) {
  17171. if (typeof path == 'function') {
  17172. return new LazyWrapper(this);
  17173. }
  17174. return this.map(function(value) {
  17175. return baseInvoke(value, path, args);
  17176. });
  17177. });
  17178. LazyWrapper.prototype.reject = function(predicate) {
  17179. return this.filter(negate(getIteratee(predicate)));
  17180. };
  17181. LazyWrapper.prototype.slice = function(start, end) {
  17182. start = toInteger(start);
  17183. var result = this;
  17184. if (result.__filtered__ && (start > 0 || end < 0)) {
  17185. return new LazyWrapper(result);
  17186. }
  17187. if (start < 0) {
  17188. result = result.takeRight(-start);
  17189. } else if (start) {
  17190. result = result.drop(start);
  17191. }
  17192. if (end !== undefined) {
  17193. end = toInteger(end);
  17194. result = end < 0 ? result.dropRight(-end) : result.take(end - start);
  17195. }
  17196. return result;
  17197. };
  17198. LazyWrapper.prototype.takeRightWhile = function(predicate) {
  17199. return this.reverse().takeWhile(predicate).reverse();
  17200. };
  17201. LazyWrapper.prototype.toArray = function() {
  17202. return this.take(MAX_ARRAY_LENGTH);
  17203. };
  17204. // Add `LazyWrapper` methods to `lodash.prototype`.
  17205. baseForOwn(LazyWrapper.prototype, function(func, methodName) {
  17206. var checkIteratee = /^(?:filter|find|map|reject)|While$/.test(methodName),
  17207. isTaker = /^(?:head|last)$/.test(methodName),
  17208. lodashFunc = lodash[isTaker ? ('take' + (methodName == 'last' ? 'Right' : '')) : methodName],
  17209. retUnwrapped = isTaker || /^find/.test(methodName);
  17210. if (!lodashFunc) {
  17211. return;
  17212. }
  17213. lodash.prototype[methodName] = function() {
  17214. var value = this.__wrapped__,
  17215. args = isTaker ? [1] : arguments,
  17216. isLazy = value instanceof LazyWrapper,
  17217. iteratee = args[0],
  17218. useLazy = isLazy || isArray(value);
  17219. var interceptor = function(value) {
  17220. var result = lodashFunc.apply(lodash, arrayPush([value], args));
  17221. return (isTaker && chainAll) ? result[0] : result;
  17222. };
  17223. if (useLazy && checkIteratee && typeof iteratee == 'function' && iteratee.length != 1) {
  17224. // Avoid lazy use if the iteratee has a "length" value other than `1`.
  17225. isLazy = useLazy = false;
  17226. }
  17227. var chainAll = this.__chain__,
  17228. isHybrid = !!this.__actions__.length,
  17229. isUnwrapped = retUnwrapped && !chainAll,
  17230. onlyLazy = isLazy && !isHybrid;
  17231. if (!retUnwrapped && useLazy) {
  17232. value = onlyLazy ? value : new LazyWrapper(this);
  17233. var result = func.apply(value, args);
  17234. result.__actions__.push({ 'func': thru, 'args': [interceptor], 'thisArg': undefined });
  17235. return new LodashWrapper(result, chainAll);
  17236. }
  17237. if (isUnwrapped && onlyLazy) {
  17238. return func.apply(this, args);
  17239. }
  17240. result = this.thru(interceptor);
  17241. return isUnwrapped ? (isTaker ? result.value()[0] : result.value()) : result;
  17242. };
  17243. });
  17244. // Add `Array` methods to `lodash.prototype`.
  17245. arrayEach(['pop', 'push', 'shift', 'sort', 'splice', 'unshift'], function(methodName) {
  17246. var func = arrayProto[methodName],
  17247. chainName = /^(?:push|sort|unshift)$/.test(methodName) ? 'tap' : 'thru',
  17248. retUnwrapped = /^(?:pop|shift)$/.test(methodName);
  17249. lodash.prototype[methodName] = function() {
  17250. var args = arguments;
  17251. if (retUnwrapped && !this.__chain__) {
  17252. var value = this.value();
  17253. return func.apply(isArray(value) ? value : [], args);
  17254. }
  17255. return this[chainName](function(value) {
  17256. return func.apply(isArray(value) ? value : [], args);
  17257. });
  17258. };
  17259. });
  17260. // Map minified method names to their real names.
  17261. baseForOwn(LazyWrapper.prototype, function(func, methodName) {
  17262. var lodashFunc = lodash[methodName];
  17263. if (lodashFunc) {
  17264. var key = (lodashFunc.name + ''),
  17265. names = realNames[key] || (realNames[key] = []);
  17266. names.push({ 'name': methodName, 'func': lodashFunc });
  17267. }
  17268. });
  17269. realNames[createHybrid(undefined, WRAP_BIND_KEY_FLAG).name] = [{
  17270. 'name': 'wrapper',
  17271. 'func': undefined
  17272. }];
  17273. // Add methods to `LazyWrapper`.
  17274. LazyWrapper.prototype.clone = lazyClone;
  17275. LazyWrapper.prototype.reverse = lazyReverse;
  17276. LazyWrapper.prototype.value = lazyValue;
  17277. // Add chain sequence methods to the `lodash` wrapper.
  17278. lodash.prototype.at = wrapperAt;
  17279. lodash.prototype.chain = wrapperChain;
  17280. lodash.prototype.commit = wrapperCommit;
  17281. lodash.prototype.next = wrapperNext;
  17282. lodash.prototype.plant = wrapperPlant;
  17283. lodash.prototype.reverse = wrapperReverse;
  17284. lodash.prototype.toJSON = lodash.prototype.valueOf = lodash.prototype.value = wrapperValue;
  17285. // Add lazy aliases.
  17286. lodash.prototype.first = lodash.prototype.head;
  17287. if (symIterator) {
  17288. lodash.prototype[symIterator] = wrapperToIterator;
  17289. }
  17290. return lodash;
  17291. });
  17292. /*--------------------------------------------------------------------------*/
  17293. // Export lodash.
  17294. var _ = runInContext();
  17295. // Some AMD build optimizers, like r.js, check for condition patterns like:
  17296. if (typeof define == 'function' && typeof define.amd == 'object' && define.amd) {
  17297. // Expose Lodash on the global object to prevent errors when Lodash is
  17298. // loaded by a script tag in the presence of an AMD loader.
  17299. // See http://requirejs.org/docs/errors.html#mismatch for more details.
  17300. // Use `_.noConflict` to remove Lodash from the global object.
  17301. root._ = _;
  17302. // Define as an anonymous module so, through path mapping, it can be
  17303. // referenced as the "underscore" module.
  17304. define(function() {
  17305. return _;
  17306. });
  17307. }
  17308. // Check for `exports` after `define` in case a build optimizer adds it.
  17309. else if (freeModule) {
  17310. // Export for Node.js.
  17311. (freeModule.exports = _)._ = _;
  17312. // Export for CommonJS support.
  17313. freeExports._ = _;
  17314. }
  17315. else {
  17316. // Export to the global object.
  17317. root._ = _;
  17318. }
  17319. }.call(this));
  17320. }).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
  17321. },{}],14:[function(require,module,exports){
  17322. /*
  17323. * Lexical analysis and token construction.
  17324. */
  17325. "use strict";
  17326. var _ = require("lodash");
  17327. var events = require("events");
  17328. var reg = require("./reg.js");
  17329. var state = require("./state.js").state;
  17330. var unicodeData = require("../data/ascii-identifier-data.js");
  17331. var asciiIdentifierStartTable = unicodeData.asciiIdentifierStartTable;
  17332. var asciiIdentifierPartTable = unicodeData.asciiIdentifierPartTable;
  17333. var nonAsciiIdentifierStartTable = require("../data/non-ascii-identifier-start.js");
  17334. var nonAsciiIdentifierPartTable = require("../data/non-ascii-identifier-part-only.js");
  17335. // Loading of this module is deferred as an optimization for ES2015 input
  17336. var es5IdentifierNames;
  17337. // Some of these token types are from JavaScript Parser API
  17338. // while others are specific to JSHint parser.
  17339. // JS Parser API: https://developer.mozilla.org/en-US/docs/SpiderMonkey/Parser_API
  17340. var Token = {
  17341. Identifier: 1,
  17342. Punctuator: 2,
  17343. NumericLiteral: 3,
  17344. StringLiteral: 4,
  17345. Comment: 5,
  17346. Keyword: 6,
  17347. RegExp: 9,
  17348. TemplateHead: 10,
  17349. TemplateMiddle: 11,
  17350. TemplateTail: 12,
  17351. NoSubstTemplate: 13
  17352. };
  17353. var Context = {
  17354. Block: 1,
  17355. Template: 2
  17356. };
  17357. function isHex(str) {
  17358. return /^[0-9a-fA-F]+$/.test(str);
  17359. }
  17360. function isHexDigit(str) {
  17361. return str.length === 1 && isHex(str);
  17362. }
  17363. // Object that handles postponed lexing verifications that checks the parsed
  17364. // environment state.
  17365. function asyncTrigger() {
  17366. var _checks = [];
  17367. return {
  17368. push: function(fn) {
  17369. _checks.push(fn);
  17370. },
  17371. check: function() {
  17372. for (var check = 0; check < _checks.length; ++check) {
  17373. _checks[check]();
  17374. }
  17375. _checks.splice(0, _checks.length);
  17376. }
  17377. };
  17378. }
  17379. /*
  17380. * Lexer for JSHint.
  17381. *
  17382. * This object does a char-by-char scan of the provided source code
  17383. * and produces a sequence of tokens.
  17384. *
  17385. * var lex = new Lexer("var i = 0;");
  17386. * lex.start();
  17387. * lex.token(); // returns the next token
  17388. *
  17389. * You have to use the token() method to move the lexer forward
  17390. * but you don't have to use its return value to get tokens. In addition
  17391. * to token() method returning the next token, the Lexer object also
  17392. * emits events.
  17393. *
  17394. * lex.on("Identifier", function(data) {
  17395. * if (data.name.indexOf("_") >= 0) {
  17396. * // Produce a warning.
  17397. * }
  17398. * });
  17399. *
  17400. * Note that the token() method returns tokens in a JSLint-compatible
  17401. * format while the event emitter uses a slightly modified version of
  17402. * Mozilla's JavaScript Parser API. Eventually, we will move away from
  17403. * JSLint format.
  17404. */
  17405. function Lexer(source) {
  17406. var lines = source;
  17407. if (typeof lines === "string") {
  17408. lines = lines
  17409. .replace(/\r\n/g, "\n")
  17410. .replace(/\r/g, "\n")
  17411. .split("\n");
  17412. }
  17413. // If the first line is a shebang (#!), make it a blank and move on.
  17414. // Shebangs are used by Node scripts.
  17415. if (lines[0] && lines[0].substr(0, 2) === "#!") {
  17416. if (lines[0].indexOf("node") !== -1) {
  17417. state.option.node = true;
  17418. }
  17419. lines[0] = "";
  17420. }
  17421. this.emitter = new events.EventEmitter();
  17422. this.source = source;
  17423. this.setLines(lines);
  17424. this.prereg = true;
  17425. this.line = 0;
  17426. this.char = 1;
  17427. this.from = 1;
  17428. this.input = "";
  17429. this.inComment = false;
  17430. this.context = [];
  17431. this.templateStarts = [];
  17432. for (var i = 0; i < state.option.indent; i += 1) {
  17433. state.tab += " ";
  17434. }
  17435. }
  17436. Lexer.prototype = {
  17437. _lines: [],
  17438. inContext: function(ctxType) {
  17439. return this.context.length > 0 && this.context[this.context.length - 1].type === ctxType;
  17440. },
  17441. pushContext: function(ctxType) {
  17442. this.context.push({ type: ctxType });
  17443. },
  17444. popContext: function() {
  17445. return this.context.pop();
  17446. },
  17447. currentContext: function() {
  17448. return this.context.length > 0 && this.context[this.context.length - 1];
  17449. },
  17450. getLines: function() {
  17451. this._lines = state.lines;
  17452. return this._lines;
  17453. },
  17454. setLines: function(val) {
  17455. this._lines = val;
  17456. state.lines = this._lines;
  17457. },
  17458. /*
  17459. * Return the next i character without actually moving the
  17460. * char pointer.
  17461. */
  17462. peek: function(i) {
  17463. return this.input.charAt(i || 0);
  17464. },
  17465. /*
  17466. * Move the char pointer forward i times.
  17467. */
  17468. skip: function(i) {
  17469. i = i || 1;
  17470. this.char += i;
  17471. this.input = this.input.slice(i);
  17472. },
  17473. /*
  17474. * Subscribe to a token event. The API for this method is similar
  17475. * Underscore.js i.e. you can subscribe to multiple events with
  17476. * one call:
  17477. *
  17478. * lex.on("Identifier Number", function(data) {
  17479. * // ...
  17480. * });
  17481. */
  17482. on: function(names, listener) {
  17483. names.split(" ").forEach(function(name) {
  17484. this.emitter.on(name, listener);
  17485. }.bind(this));
  17486. },
  17487. /*
  17488. * Trigger a token event. All arguments will be passed to each
  17489. * listener.
  17490. */
  17491. trigger: function() {
  17492. this.emitter.emit.apply(this.emitter, Array.prototype.slice.call(arguments));
  17493. },
  17494. /*
  17495. * Postpone a token event. the checking condition is set as
  17496. * last parameter, and the trigger function is called in a
  17497. * stored callback. To be later called using the check() function
  17498. * by the parser. This avoids parser's peek() to give the lexer
  17499. * a false context.
  17500. */
  17501. triggerAsync: function(type, args, checks, fn) {
  17502. checks.push(function() {
  17503. if (fn()) {
  17504. this.trigger(type, args);
  17505. }
  17506. }.bind(this));
  17507. },
  17508. /*
  17509. * Extract a punctuator out of the next sequence of characters
  17510. * or return 'null' if its not possible.
  17511. *
  17512. * This method's implementation was heavily influenced by the
  17513. * scanPunctuator function in the Esprima parser's source code.
  17514. */
  17515. scanPunctuator: function() {
  17516. var ch1 = this.peek();
  17517. var ch2, ch3, ch4;
  17518. switch (ch1) {
  17519. // Most common single-character punctuators
  17520. case ".":
  17521. if ((/^[0-9]$/).test(this.peek(1))) {
  17522. return null;
  17523. }
  17524. if (this.peek(1) === "." && this.peek(2) === ".") {
  17525. return {
  17526. type: Token.Punctuator,
  17527. value: "..."
  17528. };
  17529. }
  17530. /* falls through */
  17531. case "(":
  17532. case ")":
  17533. case ";":
  17534. case ",":
  17535. case "[":
  17536. case "]":
  17537. case ":":
  17538. case "~":
  17539. case "?":
  17540. return {
  17541. type: Token.Punctuator,
  17542. value: ch1
  17543. };
  17544. // A block/object opener
  17545. case "{":
  17546. this.pushContext(Context.Block);
  17547. return {
  17548. type: Token.Punctuator,
  17549. value: ch1
  17550. };
  17551. // A block/object closer
  17552. case "}":
  17553. if (this.inContext(Context.Block)) {
  17554. this.popContext();
  17555. }
  17556. return {
  17557. type: Token.Punctuator,
  17558. value: ch1
  17559. };
  17560. // A pound sign (for Node shebangs)
  17561. case "#":
  17562. return {
  17563. type: Token.Punctuator,
  17564. value: ch1
  17565. };
  17566. // We're at the end of input
  17567. case "":
  17568. return null;
  17569. }
  17570. // Peek more characters
  17571. ch2 = this.peek(1);
  17572. ch3 = this.peek(2);
  17573. ch4 = this.peek(3);
  17574. // 4-character punctuator: >>>=
  17575. if (ch1 === ">" && ch2 === ">" && ch3 === ">" && ch4 === "=") {
  17576. return {
  17577. type: Token.Punctuator,
  17578. value: ">>>="
  17579. };
  17580. }
  17581. // 3-character punctuators: === !== >>> <<= >>=
  17582. if (ch1 === "=" && ch2 === "=" && ch3 === "=") {
  17583. return {
  17584. type: Token.Punctuator,
  17585. value: "==="
  17586. };
  17587. }
  17588. if (ch1 === "!" && ch2 === "=" && ch3 === "=") {
  17589. return {
  17590. type: Token.Punctuator,
  17591. value: "!=="
  17592. };
  17593. }
  17594. if (ch1 === ">" && ch2 === ">" && ch3 === ">") {
  17595. return {
  17596. type: Token.Punctuator,
  17597. value: ">>>"
  17598. };
  17599. }
  17600. if (ch1 === "<" && ch2 === "<" && ch3 === "=") {
  17601. return {
  17602. type: Token.Punctuator,
  17603. value: "<<="
  17604. };
  17605. }
  17606. if (ch1 === ">" && ch2 === ">" && ch3 === "=") {
  17607. return {
  17608. type: Token.Punctuator,
  17609. value: ">>="
  17610. };
  17611. }
  17612. // Fat arrow punctuator
  17613. if (ch1 === "=" && ch2 === ">") {
  17614. return {
  17615. type: Token.Punctuator,
  17616. value: ch1 + ch2
  17617. };
  17618. }
  17619. // 2-character punctuators: <= >= == != ++ -- << >> && ||
  17620. // += -= *= %= &= |= ^= /=
  17621. if (ch1 === ch2 && ("+-<>&|".indexOf(ch1) >= 0)) {
  17622. return {
  17623. type: Token.Punctuator,
  17624. value: ch1 + ch2
  17625. };
  17626. }
  17627. if ("<>=!+-*%&|^/".indexOf(ch1) >= 0) {
  17628. if (ch2 === "=") {
  17629. return {
  17630. type: Token.Punctuator,
  17631. value: ch1 + ch2
  17632. };
  17633. }
  17634. return {
  17635. type: Token.Punctuator,
  17636. value: ch1
  17637. };
  17638. }
  17639. return null;
  17640. },
  17641. /*
  17642. * Extract a comment out of the next sequence of characters and/or
  17643. * lines or return 'null' if its not possible. Since comments can
  17644. * span across multiple lines this method has to move the char
  17645. * pointer.
  17646. *
  17647. * In addition to normal JavaScript comments (// and /*) this method
  17648. * also recognizes JSHint- and JSLint-specific comments such as
  17649. * /*jshint, /*jslint, /*globals and so on.
  17650. */
  17651. scanComments: function(checks) {
  17652. var ch1 = this.peek();
  17653. var ch2 = this.peek(1);
  17654. var rest = this.input.substr(2);
  17655. var startLine = this.line;
  17656. var startChar = this.char;
  17657. var self = this;
  17658. // Create a comment token object and make sure it
  17659. // has all the data JSHint needs to work with special
  17660. // comments.
  17661. function commentToken(label, body, opt) {
  17662. var special = ["jshint", "jslint", "members", "member", "globals", "global", "exported"];
  17663. var isSpecial = false;
  17664. var value = label + body;
  17665. var commentType = "plain";
  17666. opt = opt || {};
  17667. if (opt.isMultiline) {
  17668. value += "*/";
  17669. }
  17670. body = body.replace(/\n/g, " ");
  17671. if (label === "/*" && reg.fallsThrough.test(body)) {
  17672. isSpecial = true;
  17673. commentType = "falls through";
  17674. }
  17675. special.forEach(function(str) {
  17676. if (isSpecial) {
  17677. return;
  17678. }
  17679. // Don't recognize any special comments other than jshint for single-line
  17680. // comments. This introduced many problems with legit comments.
  17681. if (label === "//" && str !== "jshint") {
  17682. return;
  17683. }
  17684. if (body.charAt(str.length) === " " && body.substr(0, str.length) === str) {
  17685. isSpecial = true;
  17686. label = label + str;
  17687. body = body.substr(str.length);
  17688. }
  17689. if (!isSpecial && body.charAt(0) === " " && body.charAt(str.length + 1) === " " &&
  17690. body.substr(1, str.length) === str) {
  17691. isSpecial = true;
  17692. label = label + " " + str;
  17693. body = body.substr(str.length + 1);
  17694. }
  17695. // To handle rarer case when special word is separated from label by
  17696. // multiple spaces or tabs
  17697. var strIndex = body.indexOf(str);
  17698. if (!isSpecial && strIndex >= 0 && body.charAt(strIndex + str.length) === " ") {
  17699. var isAllWhitespace = body.substr(0, strIndex).trim().length === 0;
  17700. if (isAllWhitespace) {
  17701. isSpecial = true;
  17702. body = body.substr(str.length + strIndex);
  17703. }
  17704. }
  17705. if (!isSpecial) {
  17706. return;
  17707. }
  17708. switch (str) {
  17709. case "member":
  17710. commentType = "members";
  17711. break;
  17712. case "global":
  17713. commentType = "globals";
  17714. break;
  17715. default:
  17716. var options = body.split(":").map(function(v) {
  17717. return v.replace(/^\s+/, "").replace(/\s+$/, "");
  17718. });
  17719. if (options.length === 2) {
  17720. switch (options[0]) {
  17721. case "ignore":
  17722. switch (options[1]) {
  17723. case "start":
  17724. self.ignoringLinterErrors = true;
  17725. isSpecial = false;
  17726. break;
  17727. case "end":
  17728. self.ignoringLinterErrors = false;
  17729. isSpecial = false;
  17730. break;
  17731. }
  17732. }
  17733. }
  17734. commentType = str;
  17735. }
  17736. });
  17737. return {
  17738. type: Token.Comment,
  17739. commentType: commentType,
  17740. value: value,
  17741. body: body,
  17742. isSpecial: isSpecial,
  17743. isMalformed: opt.isMalformed || false
  17744. };
  17745. }
  17746. // End of unbegun comment. Raise an error and skip that input.
  17747. if (ch1 === "*" && ch2 === "/") {
  17748. this.trigger("error", {
  17749. code: "E018",
  17750. line: startLine,
  17751. character: startChar
  17752. });
  17753. this.skip(2);
  17754. return null;
  17755. }
  17756. // Comments must start either with // or /*
  17757. if (ch1 !== "/" || (ch2 !== "*" && ch2 !== "/")) {
  17758. return null;
  17759. }
  17760. // One-line comment
  17761. if (ch2 === "/") {
  17762. this.skip(this.input.length); // Skip to the EOL.
  17763. return commentToken("//", rest);
  17764. }
  17765. var body = "";
  17766. /* Multi-line comment */
  17767. if (ch2 === "*") {
  17768. this.inComment = true;
  17769. this.skip(2);
  17770. while (this.peek() !== "*" || this.peek(1) !== "/") {
  17771. if (this.peek() === "") { // End of Line
  17772. body += "\n";
  17773. // If we hit EOF and our comment is still unclosed,
  17774. // trigger an error and end the comment implicitly.
  17775. if (!this.nextLine(checks)) {
  17776. this.trigger("error", {
  17777. code: "E017",
  17778. line: startLine,
  17779. character: startChar
  17780. });
  17781. this.inComment = false;
  17782. return commentToken("/*", body, {
  17783. isMultiline: true,
  17784. isMalformed: true
  17785. });
  17786. }
  17787. } else {
  17788. body += this.peek();
  17789. this.skip();
  17790. }
  17791. }
  17792. this.skip(2);
  17793. this.inComment = false;
  17794. return commentToken("/*", body, { isMultiline: true });
  17795. }
  17796. },
  17797. /*
  17798. * Extract a keyword out of the next sequence of characters or
  17799. * return 'null' if its not possible.
  17800. */
  17801. scanKeyword: function() {
  17802. var result = /^[a-zA-Z_$][a-zA-Z0-9_$]*/.exec(this.input);
  17803. var keywords = [
  17804. "if", "in", "do", "var", "for", "new",
  17805. "try", "let", "this", "else", "case",
  17806. "void", "with", "enum", "while", "break",
  17807. "catch", "throw", "const", "yield", "class",
  17808. "super", "return", "typeof", "delete",
  17809. "switch", "export", "import", "default",
  17810. "finally", "extends", "function", "continue",
  17811. "debugger", "instanceof", "true", "false", "null"
  17812. ];
  17813. if (result && keywords.indexOf(result[0]) >= 0) {
  17814. return {
  17815. type: Token.Keyword,
  17816. value: result[0]
  17817. };
  17818. }
  17819. return null;
  17820. },
  17821. /*
  17822. * Extract a JavaScript identifier out of the next sequence of
  17823. * characters or return 'null' if its not possible.
  17824. */
  17825. scanIdentifier: function(checks) {
  17826. var id = "";
  17827. var index = 0;
  17828. var char, value;
  17829. function isNonAsciiIdentifierStart(code) {
  17830. return nonAsciiIdentifierStartTable.indexOf(code) > -1;
  17831. }
  17832. function isNonAsciiIdentifierPart(code) {
  17833. return isNonAsciiIdentifierStart(code) || nonAsciiIdentifierPartTable.indexOf(code) > -1;
  17834. }
  17835. var readUnicodeEscapeSequence = function() {
  17836. /*jshint validthis:true */
  17837. index += 1;
  17838. if (this.peek(index) !== "u") {
  17839. return null;
  17840. }
  17841. var sequence = this.peek(index + 1) + this.peek(index + 2) +
  17842. this.peek(index + 3) + this.peek(index + 4);
  17843. var code;
  17844. if (isHex(sequence)) {
  17845. code = parseInt(sequence, 16);
  17846. if (asciiIdentifierPartTable[code] || isNonAsciiIdentifierPart(code)) {
  17847. index += 5;
  17848. return "\\u" + sequence;
  17849. }
  17850. return null;
  17851. }
  17852. return null;
  17853. }.bind(this);
  17854. var getIdentifierStart = function() {
  17855. /*jshint validthis:true */
  17856. var chr = this.peek(index);
  17857. var code = chr.charCodeAt(0);
  17858. if (code === 92) {
  17859. return readUnicodeEscapeSequence();
  17860. }
  17861. if (code < 128) {
  17862. if (asciiIdentifierStartTable[code]) {
  17863. index += 1;
  17864. return chr;
  17865. }
  17866. return null;
  17867. }
  17868. if (isNonAsciiIdentifierStart(code)) {
  17869. index += 1;
  17870. return chr;
  17871. }
  17872. return null;
  17873. }.bind(this);
  17874. var getIdentifierPart = function() {
  17875. /*jshint validthis:true */
  17876. var chr = this.peek(index);
  17877. var code = chr.charCodeAt(0);
  17878. if (code === 92) {
  17879. return readUnicodeEscapeSequence();
  17880. }
  17881. if (code < 128) {
  17882. if (asciiIdentifierPartTable[code]) {
  17883. index += 1;
  17884. return chr;
  17885. }
  17886. return null;
  17887. }
  17888. if (isNonAsciiIdentifierPart(code)) {
  17889. index += 1;
  17890. return chr;
  17891. }
  17892. return null;
  17893. }.bind(this);
  17894. function removeEscapeSequences(id) {
  17895. return id.replace(/\\u([0-9a-fA-F]{4})/g, function(m0, codepoint) {
  17896. return String.fromCharCode(parseInt(codepoint, 16));
  17897. });
  17898. }
  17899. char = getIdentifierStart();
  17900. if (char === null) {
  17901. return null;
  17902. }
  17903. id = char;
  17904. for (;;) {
  17905. char = getIdentifierPart();
  17906. if (char === null) {
  17907. break;
  17908. }
  17909. id += char;
  17910. }
  17911. value = removeEscapeSequences(id);
  17912. if (!state.inES6(true)) {
  17913. es5IdentifierNames = require("../data/es5-identifier-names.js");
  17914. if (!es5IdentifierNames.test(value)) {
  17915. this.triggerAsync(
  17916. "warning",
  17917. {
  17918. code: "W119",
  17919. line: this.line,
  17920. character: this.char,
  17921. data: ["unicode 8", "6"]
  17922. },
  17923. checks,
  17924. function() { return true; }
  17925. );
  17926. }
  17927. }
  17928. return {
  17929. type: Token.Identifier,
  17930. value: value,
  17931. text: id,
  17932. tokenLength: id.length
  17933. };
  17934. },
  17935. /*
  17936. * Extract a numeric literal out of the next sequence of
  17937. * characters or return 'null' if its not possible. This method
  17938. * supports all numeric literals described in section 7.8.3
  17939. * of the EcmaScript 5 specification.
  17940. *
  17941. * This method's implementation was heavily influenced by the
  17942. * scanNumericLiteral function in the Esprima parser's source code.
  17943. */
  17944. scanNumericLiteral: function(checks) {
  17945. var index = 0;
  17946. var value = "";
  17947. var length = this.input.length;
  17948. var char = this.peek(index);
  17949. var isAllowedDigit = isDecimalDigit;
  17950. var base = 10;
  17951. var isLegacy = false;
  17952. function isDecimalDigit(str) {
  17953. return (/^[0-9]$/).test(str);
  17954. }
  17955. function isOctalDigit(str) {
  17956. return (/^[0-7]$/).test(str);
  17957. }
  17958. function isBinaryDigit(str) {
  17959. return (/^[01]$/).test(str);
  17960. }
  17961. function isIdentifierStart(ch) {
  17962. return (ch === "$") || (ch === "_") || (ch === "\\") ||
  17963. (ch >= "a" && ch <= "z") || (ch >= "A" && ch <= "Z");
  17964. }
  17965. // Numbers must start either with a decimal digit or a point.
  17966. if (char !== "." && !isDecimalDigit(char)) {
  17967. return null;
  17968. }
  17969. if (char !== ".") {
  17970. value = this.peek(index);
  17971. index += 1;
  17972. char = this.peek(index);
  17973. if (value === "0") {
  17974. // Base-16 numbers.
  17975. if (char === "x" || char === "X") {
  17976. isAllowedDigit = isHexDigit;
  17977. base = 16;
  17978. index += 1;
  17979. value += char;
  17980. }
  17981. // Base-8 numbers.
  17982. if (char === "o" || char === "O") {
  17983. isAllowedDigit = isOctalDigit;
  17984. base = 8;
  17985. if (!state.inES6(true)) {
  17986. this.triggerAsync(
  17987. "warning",
  17988. {
  17989. code: "W119",
  17990. line: this.line,
  17991. character: this.char,
  17992. data: [ "Octal integer literal", "6" ]
  17993. },
  17994. checks,
  17995. function() { return true; }
  17996. );
  17997. }
  17998. index += 1;
  17999. value += char;
  18000. }
  18001. // Base-2 numbers.
  18002. if (char === "b" || char === "B") {
  18003. isAllowedDigit = isBinaryDigit;
  18004. base = 2;
  18005. if (!state.inES6(true)) {
  18006. this.triggerAsync(
  18007. "warning",
  18008. {
  18009. code: "W119",
  18010. line: this.line,
  18011. character: this.char,
  18012. data: [ "Binary integer literal", "6" ]
  18013. },
  18014. checks,
  18015. function() { return true; }
  18016. );
  18017. }
  18018. index += 1;
  18019. value += char;
  18020. }
  18021. // Legacy base-8 numbers.
  18022. if (isOctalDigit(char)) {
  18023. isAllowedDigit = isOctalDigit;
  18024. base = 8;
  18025. isLegacy = true;
  18026. index += 1;
  18027. value += char;
  18028. }
  18029. // Decimal numbers that start with '0' such as '09' are illegal
  18030. // but we still parse them and return as malformed.
  18031. if (!isOctalDigit(char) && isDecimalDigit(char)) {
  18032. index += 1;
  18033. value += char;
  18034. }
  18035. }
  18036. while (index < length) {
  18037. char = this.peek(index);
  18038. // Numbers like '019' (note the 9) are not valid octals
  18039. // but we still parse them and mark as malformed.
  18040. if (!(isLegacy && isDecimalDigit(char)) && !isAllowedDigit(char)) {
  18041. break;
  18042. }
  18043. value += char;
  18044. index += 1;
  18045. }
  18046. if (isAllowedDigit !== isDecimalDigit) {
  18047. if (!isLegacy && value.length <= 2) { // 0x
  18048. return {
  18049. type: Token.NumericLiteral,
  18050. value: value,
  18051. isMalformed: true
  18052. };
  18053. }
  18054. if (index < length) {
  18055. char = this.peek(index);
  18056. if (isIdentifierStart(char)) {
  18057. return null;
  18058. }
  18059. }
  18060. return {
  18061. type: Token.NumericLiteral,
  18062. value: value,
  18063. base: base,
  18064. isLegacy: isLegacy,
  18065. isMalformed: false
  18066. };
  18067. }
  18068. }
  18069. // Decimal digits.
  18070. if (char === ".") {
  18071. value += char;
  18072. index += 1;
  18073. while (index < length) {
  18074. char = this.peek(index);
  18075. if (!isDecimalDigit(char)) {
  18076. break;
  18077. }
  18078. value += char;
  18079. index += 1;
  18080. }
  18081. }
  18082. // Exponent part.
  18083. if (char === "e" || char === "E") {
  18084. value += char;
  18085. index += 1;
  18086. char = this.peek(index);
  18087. if (char === "+" || char === "-") {
  18088. value += this.peek(index);
  18089. index += 1;
  18090. }
  18091. char = this.peek(index);
  18092. if (isDecimalDigit(char)) {
  18093. value += char;
  18094. index += 1;
  18095. while (index < length) {
  18096. char = this.peek(index);
  18097. if (!isDecimalDigit(char)) {
  18098. break;
  18099. }
  18100. value += char;
  18101. index += 1;
  18102. }
  18103. } else {
  18104. return null;
  18105. }
  18106. }
  18107. if (index < length) {
  18108. char = this.peek(index);
  18109. if (isIdentifierStart(char)) {
  18110. return null;
  18111. }
  18112. }
  18113. return {
  18114. type: Token.NumericLiteral,
  18115. value: value,
  18116. base: base,
  18117. isMalformed: !isFinite(value)
  18118. };
  18119. },
  18120. // Assumes previously parsed character was \ (=== '\\') and was not skipped.
  18121. scanEscapeSequence: function(checks) {
  18122. var allowNewLine = false;
  18123. var jump = 1;
  18124. this.skip();
  18125. var char = this.peek();
  18126. switch (char) {
  18127. case "'":
  18128. this.triggerAsync("warning", {
  18129. code: "W114",
  18130. line: this.line,
  18131. character: this.char,
  18132. data: [ "\\'" ]
  18133. }, checks, function() {return state.jsonMode; });
  18134. break;
  18135. case "b":
  18136. char = "\\b";
  18137. break;
  18138. case "f":
  18139. char = "\\f";
  18140. break;
  18141. case "n":
  18142. char = "\\n";
  18143. break;
  18144. case "r":
  18145. char = "\\r";
  18146. break;
  18147. case "t":
  18148. char = "\\t";
  18149. break;
  18150. case "0":
  18151. char = "\\0";
  18152. // Octal literals fail in strict mode.
  18153. // Check if the number is between 00 and 07.
  18154. var n = parseInt(this.peek(1), 10);
  18155. this.triggerAsync("warning", {
  18156. code: "W115",
  18157. line: this.line,
  18158. character: this.char
  18159. }, checks,
  18160. function() { return n >= 0 && n <= 7 && state.isStrict(); });
  18161. break;
  18162. case "1":
  18163. case "2":
  18164. case "3":
  18165. case "4":
  18166. case "5":
  18167. case "6":
  18168. case "7":
  18169. char = "\\" + char;
  18170. this.triggerAsync("warning", {
  18171. code: "W115",
  18172. line: this.line,
  18173. character: this.char
  18174. }, checks,
  18175. function() { return state.isStrict(); });
  18176. break;
  18177. case "u":
  18178. var sequence = this.input.substr(1, 4);
  18179. var code = parseInt(sequence, 16);
  18180. if (!isHex(sequence)) {
  18181. // This condition unequivocally describes a syntax error.
  18182. // TODO: Re-factor as an "error" (not a "warning").
  18183. this.trigger("warning", {
  18184. code: "W052",
  18185. line: this.line,
  18186. character: this.char,
  18187. data: [ "u" + sequence ]
  18188. });
  18189. }
  18190. char = String.fromCharCode(code);
  18191. jump = 5;
  18192. break;
  18193. case "v":
  18194. this.triggerAsync("warning", {
  18195. code: "W114",
  18196. line: this.line,
  18197. character: this.char,
  18198. data: [ "\\v" ]
  18199. }, checks, function() { return state.jsonMode; });
  18200. char = "\v";
  18201. break;
  18202. case "x":
  18203. var x = parseInt(this.input.substr(1, 2), 16);
  18204. this.triggerAsync("warning", {
  18205. code: "W114",
  18206. line: this.line,
  18207. character: this.char,
  18208. data: [ "\\x-" ]
  18209. }, checks, function() { return state.jsonMode; });
  18210. char = String.fromCharCode(x);
  18211. jump = 3;
  18212. break;
  18213. case "\\":
  18214. char = "\\\\";
  18215. break;
  18216. case "\"":
  18217. char = "\\\"";
  18218. break;
  18219. case "/":
  18220. break;
  18221. case "":
  18222. allowNewLine = true;
  18223. char = "";
  18224. break;
  18225. }
  18226. return { char: char, jump: jump, allowNewLine: allowNewLine };
  18227. },
  18228. /*
  18229. * Extract a template literal out of the next sequence of characters
  18230. * and/or lines or return 'null' if its not possible. Since template
  18231. * literals can span across multiple lines, this method has to move
  18232. * the char pointer.
  18233. */
  18234. scanTemplateLiteral: function(checks) {
  18235. var tokenType;
  18236. var value = "";
  18237. var ch;
  18238. var startLine = this.line;
  18239. var startChar = this.char;
  18240. var depth = this.templateStarts.length;
  18241. if (this.peek() === "`") {
  18242. if (!state.inES6(true)) {
  18243. this.triggerAsync(
  18244. "warning",
  18245. {
  18246. code: "W119",
  18247. line: this.line,
  18248. character: this.char,
  18249. data: ["template literal syntax", "6"]
  18250. },
  18251. checks,
  18252. function() { return true; }
  18253. );
  18254. }
  18255. // Template must start with a backtick.
  18256. tokenType = Token.TemplateHead;
  18257. this.templateStarts.push({ line: this.line, char: this.char });
  18258. depth = this.templateStarts.length;
  18259. this.skip(1);
  18260. this.pushContext(Context.Template);
  18261. } else if (this.inContext(Context.Template) && this.peek() === "}") {
  18262. // If we're in a template context, and we have a '}', lex a TemplateMiddle.
  18263. tokenType = Token.TemplateMiddle;
  18264. } else {
  18265. // Go lex something else.
  18266. return null;
  18267. }
  18268. while (this.peek() !== "`") {
  18269. while ((ch = this.peek()) === "") {
  18270. value += "\n";
  18271. if (!this.nextLine(checks)) {
  18272. // Unclosed template literal --- point to the starting "`"
  18273. var startPos = this.templateStarts.pop();
  18274. this.trigger("error", {
  18275. code: "E052",
  18276. line: startPos.line,
  18277. character: startPos.char
  18278. });
  18279. return {
  18280. type: tokenType,
  18281. value: value,
  18282. startLine: startLine,
  18283. startChar: startChar,
  18284. isUnclosed: true,
  18285. depth: depth,
  18286. context: this.popContext()
  18287. };
  18288. }
  18289. }
  18290. if (ch === '$' && this.peek(1) === '{') {
  18291. value += '${';
  18292. this.skip(2);
  18293. return {
  18294. type: tokenType,
  18295. value: value,
  18296. startLine: startLine,
  18297. startChar: startChar,
  18298. isUnclosed: false,
  18299. depth: depth,
  18300. context: this.currentContext()
  18301. };
  18302. } else if (ch === '\\') {
  18303. var escape = this.scanEscapeSequence(checks);
  18304. value += escape.char;
  18305. this.skip(escape.jump);
  18306. } else if (ch !== '`') {
  18307. // Otherwise, append the value and continue.
  18308. value += ch;
  18309. this.skip(1);
  18310. }
  18311. }
  18312. // Final value is either NoSubstTemplate or TemplateTail
  18313. tokenType = tokenType === Token.TemplateHead ? Token.NoSubstTemplate : Token.TemplateTail;
  18314. this.skip(1);
  18315. this.templateStarts.pop();
  18316. return {
  18317. type: tokenType,
  18318. value: value,
  18319. startLine: startLine,
  18320. startChar: startChar,
  18321. isUnclosed: false,
  18322. depth: depth,
  18323. context: this.popContext()
  18324. };
  18325. },
  18326. /*
  18327. * Extract a string out of the next sequence of characters and/or
  18328. * lines or return 'null' if its not possible. Since strings can
  18329. * span across multiple lines this method has to move the char
  18330. * pointer.
  18331. *
  18332. * This method recognizes pseudo-multiline JavaScript strings:
  18333. *
  18334. * var str = "hello\
  18335. * world";
  18336. */
  18337. scanStringLiteral: function(checks) {
  18338. /*jshint loopfunc:true */
  18339. var quote = this.peek();
  18340. // String must start with a quote.
  18341. if (quote !== "\"" && quote !== "'") {
  18342. return null;
  18343. }
  18344. // In JSON strings must always use double quotes.
  18345. this.triggerAsync("warning", {
  18346. code: "W108",
  18347. line: this.line,
  18348. character: this.char // +1?
  18349. }, checks, function() { return state.jsonMode && quote !== "\""; });
  18350. var value = "";
  18351. var startLine = this.line;
  18352. var startChar = this.char;
  18353. var allowNewLine = false;
  18354. this.skip();
  18355. while (this.peek() !== quote) {
  18356. if (this.peek() === "") { // End Of Line
  18357. // If an EOL is not preceded by a backslash, show a warning
  18358. // and proceed like it was a legit multi-line string where
  18359. // author simply forgot to escape the newline symbol.
  18360. //
  18361. // Another approach is to implicitly close a string on EOL
  18362. // but it generates too many false positives.
  18363. if (!allowNewLine) {
  18364. // This condition unequivocally describes a syntax error.
  18365. // TODO: Emit error E029 and remove W112.
  18366. this.trigger("warning", {
  18367. code: "W112",
  18368. line: this.line,
  18369. character: this.char
  18370. });
  18371. } else {
  18372. allowNewLine = false;
  18373. // Otherwise show a warning if multistr option was not set.
  18374. // For JSON, show warning no matter what.
  18375. this.triggerAsync("warning", {
  18376. code: "W043",
  18377. line: this.line,
  18378. character: this.char
  18379. }, checks, function() { return !state.option.multistr; });
  18380. this.triggerAsync("warning", {
  18381. code: "W042",
  18382. line: this.line,
  18383. character: this.char
  18384. }, checks, function() { return state.jsonMode && state.option.multistr; });
  18385. }
  18386. // If we get an EOF inside of an unclosed string, show an
  18387. // error and implicitly close it at the EOF point.
  18388. if (!this.nextLine(checks)) {
  18389. return {
  18390. type: Token.StringLiteral,
  18391. value: value,
  18392. startLine: startLine,
  18393. startChar: startChar,
  18394. isUnclosed: true,
  18395. quote: quote
  18396. };
  18397. }
  18398. } else { // Any character other than End Of Line
  18399. allowNewLine = false;
  18400. var char = this.peek();
  18401. var jump = 1; // A length of a jump, after we're done
  18402. // parsing this character.
  18403. if (char < " ") {
  18404. // Warn about a control character in a string.
  18405. this.triggerAsync(
  18406. "warning",
  18407. {
  18408. code: "W113",
  18409. line: this.line,
  18410. character: this.char,
  18411. data: [ "<non-printable>" ]
  18412. },
  18413. checks,
  18414. function() { return true; }
  18415. );
  18416. }
  18417. // Special treatment for some escaped characters.
  18418. if (char === "\\") {
  18419. var parsed = this.scanEscapeSequence(checks);
  18420. char = parsed.char;
  18421. jump = parsed.jump;
  18422. allowNewLine = parsed.allowNewLine;
  18423. }
  18424. // If char is the empty string, end of the line has been reached. In
  18425. // this case, `this.char` should not be incremented so that warnings
  18426. // and errors reported in the subsequent loop iteration have the
  18427. // correct character column offset.
  18428. if (char !== "") {
  18429. value += char;
  18430. this.skip(jump);
  18431. }
  18432. }
  18433. }
  18434. this.skip();
  18435. return {
  18436. type: Token.StringLiteral,
  18437. value: value,
  18438. startLine: startLine,
  18439. startChar: startChar,
  18440. isUnclosed: false,
  18441. quote: quote
  18442. };
  18443. },
  18444. /*
  18445. * Extract a regular expression out of the next sequence of
  18446. * characters and/or lines or return 'null' if its not possible.
  18447. *
  18448. * This method is platform dependent: it accepts almost any
  18449. * regular expression values but then tries to compile and run
  18450. * them using system's RegExp object. This means that there are
  18451. * rare edge cases where one JavaScript engine complains about
  18452. * your regular expression while others don't.
  18453. */
  18454. scanRegExp: function(checks) {
  18455. var index = 0;
  18456. var length = this.input.length;
  18457. var char = this.peek();
  18458. var value = char;
  18459. var body = "";
  18460. var flags = [];
  18461. var malformed = false;
  18462. var isCharSet = false;
  18463. var terminated, malformedDesc;
  18464. var scanUnexpectedChars = function() {
  18465. // Unexpected control character
  18466. if (char < " ") {
  18467. malformed = true;
  18468. this.triggerAsync(
  18469. "warning",
  18470. {
  18471. code: "W048",
  18472. line: this.line,
  18473. character: this.char
  18474. },
  18475. checks,
  18476. function() { return true; }
  18477. );
  18478. }
  18479. // Unexpected escaped character
  18480. if (char === "<") {
  18481. malformed = true;
  18482. this.triggerAsync(
  18483. "warning",
  18484. {
  18485. code: "W049",
  18486. line: this.line,
  18487. character: this.char,
  18488. data: [ char ]
  18489. },
  18490. checks,
  18491. function() { return true; }
  18492. );
  18493. }
  18494. }.bind(this);
  18495. // Regular expressions must start with '/'
  18496. if (!this.prereg || char !== "/") {
  18497. return null;
  18498. }
  18499. index += 1;
  18500. terminated = false;
  18501. // Try to get everything in between slashes. A couple of
  18502. // cases aside (see scanUnexpectedChars) we don't really
  18503. // care whether the resulting expression is valid or not.
  18504. // We will check that later using the RegExp object.
  18505. while (index < length) {
  18506. char = this.peek(index);
  18507. value += char;
  18508. body += char;
  18509. if (isCharSet) {
  18510. if (char === "]") {
  18511. if (this.peek(index - 1) !== "\\" || this.peek(index - 2) === "\\") {
  18512. isCharSet = false;
  18513. }
  18514. }
  18515. if (char === "\\") {
  18516. index += 1;
  18517. char = this.peek(index);
  18518. body += char;
  18519. value += char;
  18520. scanUnexpectedChars();
  18521. }
  18522. index += 1;
  18523. continue;
  18524. }
  18525. if (char === "\\") {
  18526. index += 1;
  18527. char = this.peek(index);
  18528. body += char;
  18529. value += char;
  18530. scanUnexpectedChars();
  18531. if (char === "/") {
  18532. index += 1;
  18533. continue;
  18534. }
  18535. if (char === "[") {
  18536. index += 1;
  18537. continue;
  18538. }
  18539. }
  18540. if (char === "[") {
  18541. isCharSet = true;
  18542. index += 1;
  18543. continue;
  18544. }
  18545. if (char === "/") {
  18546. body = body.substr(0, body.length - 1);
  18547. terminated = true;
  18548. index += 1;
  18549. break;
  18550. }
  18551. index += 1;
  18552. }
  18553. // A regular expression that was never closed is an
  18554. // error from which we cannot recover.
  18555. if (!terminated) {
  18556. this.trigger("error", {
  18557. code: "E015",
  18558. line: this.line,
  18559. character: this.from
  18560. });
  18561. return void this.trigger("fatal", {
  18562. line: this.line,
  18563. from: this.from
  18564. });
  18565. }
  18566. // Parse flags (if any).
  18567. while (index < length) {
  18568. char = this.peek(index);
  18569. if (!/[gimy]/.test(char)) {
  18570. break;
  18571. }
  18572. if (char === "y") {
  18573. if (!state.inES6(true)) {
  18574. this.triggerAsync(
  18575. "warning",
  18576. {
  18577. code: "W119",
  18578. line: this.line,
  18579. character: this.char,
  18580. data: [ "Sticky RegExp flag", "6" ]
  18581. },
  18582. checks,
  18583. function() { return true; }
  18584. );
  18585. }
  18586. if (value.indexOf("y") > -1) {
  18587. malformedDesc = "Duplicate RegExp flag";
  18588. }
  18589. } else {
  18590. flags.push(char);
  18591. }
  18592. value += char;
  18593. index += 1;
  18594. }
  18595. // Check regular expression for correctness.
  18596. try {
  18597. new RegExp(body, flags.join(""));
  18598. } catch (err) {
  18599. /**
  18600. * Because JSHint relies on the current engine's RegExp parser to
  18601. * validate RegExp literals, the description (exposed as the "data"
  18602. * property on the error object) is platform dependent.
  18603. */
  18604. malformedDesc = err.message;
  18605. }
  18606. if (malformedDesc) {
  18607. malformed = true;
  18608. this.trigger("error", {
  18609. code: "E016",
  18610. line: this.line,
  18611. character: this.char,
  18612. data: [ malformedDesc ]
  18613. });
  18614. }
  18615. return {
  18616. type: Token.RegExp,
  18617. value: value,
  18618. isMalformed: malformed
  18619. };
  18620. },
  18621. /*
  18622. * Scan for any occurrence of non-breaking spaces. Non-breaking spaces
  18623. * can be mistakenly typed on OS X with option-space. Non UTF-8 web
  18624. * pages with non-breaking pages produce syntax errors.
  18625. */
  18626. scanNonBreakingSpaces: function() {
  18627. return state.option.nonbsp ?
  18628. this.input.search(/(\u00A0)/) : -1;
  18629. },
  18630. /*
  18631. * Produce the next raw token or return 'null' if no tokens can be matched.
  18632. * This method skips over all space characters.
  18633. */
  18634. next: function(checks) {
  18635. this.from = this.char;
  18636. // Move to the next non-space character.
  18637. while (reg.whitespace.test(this.peek())) {
  18638. this.from += 1;
  18639. this.skip();
  18640. }
  18641. // Methods that work with multi-line structures and move the
  18642. // character pointer.
  18643. var match = this.scanComments(checks) ||
  18644. this.scanStringLiteral(checks) ||
  18645. this.scanTemplateLiteral(checks);
  18646. if (match) {
  18647. return match;
  18648. }
  18649. // Methods that don't move the character pointer.
  18650. match =
  18651. this.scanRegExp(checks) ||
  18652. this.scanPunctuator() ||
  18653. this.scanKeyword() ||
  18654. this.scanIdentifier(checks) ||
  18655. this.scanNumericLiteral(checks);
  18656. if (match) {
  18657. this.skip(match.tokenLength || match.value.length);
  18658. return match;
  18659. }
  18660. // No token could be matched, give up.
  18661. return null;
  18662. },
  18663. /*
  18664. * Switch to the next line and reset all char pointers. Once
  18665. * switched, this method also checks for other minor warnings.
  18666. */
  18667. nextLine: function(checks) {
  18668. var char;
  18669. if (this.line >= this.getLines().length) {
  18670. return false;
  18671. }
  18672. this.input = this.getLines()[this.line];
  18673. this.line += 1;
  18674. this.char = 1;
  18675. this.from = 1;
  18676. var inputTrimmed = this.input.trim();
  18677. var startsWith = function() {
  18678. return _.some(arguments, function(prefix) {
  18679. return inputTrimmed.indexOf(prefix) === 0;
  18680. });
  18681. };
  18682. var endsWith = function() {
  18683. return _.some(arguments, function(suffix) {
  18684. return inputTrimmed.indexOf(suffix, inputTrimmed.length - suffix.length) !== -1;
  18685. });
  18686. };
  18687. // If we are ignoring linter errors, replace the input with empty string
  18688. // if it doesn't already at least start or end a multi-line comment
  18689. if (this.ignoringLinterErrors === true) {
  18690. if (!startsWith("/*", "//") && !(this.inComment && endsWith("*/"))) {
  18691. this.input = "";
  18692. }
  18693. }
  18694. char = this.scanNonBreakingSpaces();
  18695. if (char >= 0) {
  18696. this.triggerAsync(
  18697. "warning",
  18698. { code: "W125", line: this.line, character: char + 1 },
  18699. checks,
  18700. function() { return true; }
  18701. );
  18702. }
  18703. this.input = this.input.replace(/\t/g, state.tab);
  18704. // If there is a limit on line length, warn when lines get too
  18705. // long.
  18706. if (!this.ignoringLinterErrors && state.option.maxlen &&
  18707. state.option.maxlen < this.input.length) {
  18708. var inComment = this.inComment ||
  18709. startsWith.call(inputTrimmed, "//") ||
  18710. startsWith.call(inputTrimmed, "/*");
  18711. var shouldTriggerError = !inComment || !reg.maxlenException.test(inputTrimmed);
  18712. if (shouldTriggerError) {
  18713. this.triggerAsync(
  18714. "warning",
  18715. { code: "W101", line: this.line, character: this.input.length },
  18716. checks,
  18717. function() { return true; }
  18718. );
  18719. }
  18720. }
  18721. return true;
  18722. },
  18723. /*
  18724. * Produce the next token. This function is called by advance() to get
  18725. * the next token. It returns a token in a JSLint-compatible format.
  18726. */
  18727. token: function() {
  18728. /*jshint loopfunc:true */
  18729. var checks = asyncTrigger();
  18730. var token;
  18731. function isReserved(token, isProperty) {
  18732. // At present all current identifiers have reserved set.
  18733. // Preserving check anyway, for future-proofing.
  18734. /* istanbul ignore if */
  18735. if (!token.reserved) {
  18736. return false;
  18737. }
  18738. var meta = token.meta;
  18739. if (meta && meta.isFutureReservedWord && state.inES5()) {
  18740. // ES3 FutureReservedWord in an ES5 environment.
  18741. if (!meta.es5) {
  18742. return false;
  18743. }
  18744. // Some ES5 FutureReservedWord identifiers are active only
  18745. // within a strict mode environment.
  18746. if (meta.strictOnly) {
  18747. if (!state.option.strict && !state.isStrict()) {
  18748. return false;
  18749. }
  18750. }
  18751. if (isProperty) {
  18752. return false;
  18753. }
  18754. }
  18755. return true;
  18756. }
  18757. // Produce a token object.
  18758. var create = function(type, value, isProperty, token) {
  18759. /*jshint validthis:true */
  18760. var obj;
  18761. if (type !== "(endline)" && type !== "(end)") {
  18762. this.prereg = false;
  18763. }
  18764. if (type === "(punctuator)") {
  18765. switch (value) {
  18766. case ".":
  18767. case ")":
  18768. case "~":
  18769. case "#":
  18770. case "]":
  18771. case "}":
  18772. case "++":
  18773. case "--":
  18774. this.prereg = false;
  18775. break;
  18776. default:
  18777. this.prereg = true;
  18778. }
  18779. obj = Object.create(state.syntax[value] || state.syntax["(error)"]);
  18780. }
  18781. if (type === "(identifier)") {
  18782. if (value === "return" || value === "case" || value === "yield" ||
  18783. value === "typeof" || value === "instanceof" || value === "void") {
  18784. this.prereg = true;
  18785. }
  18786. if (_.has(state.syntax, value)) {
  18787. obj = Object.create(state.syntax[value]);
  18788. // If this can't be a reserved keyword, reset the object.
  18789. if (!isReserved(obj, isProperty && type === "(identifier)")) {
  18790. obj = null;
  18791. }
  18792. }
  18793. }
  18794. if (type === "(template)" || type === "(template middle)") {
  18795. this.prereg = true;
  18796. }
  18797. if (!obj) {
  18798. obj = Object.create(state.syntax[type]);
  18799. }
  18800. obj.identifier = (type === "(identifier)");
  18801. obj.type = obj.type || type;
  18802. obj.value = value;
  18803. obj.line = this.line;
  18804. obj.character = this.char;
  18805. obj.from = this.from;
  18806. if (obj.identifier && token) obj.raw_text = token.text || token.value;
  18807. if (token && token.startLine && token.startLine !== this.line) {
  18808. obj.startLine = token.startLine;
  18809. }
  18810. if (token && token.context) {
  18811. // Context of current token
  18812. obj.context = token.context;
  18813. }
  18814. if (token && token.depth) {
  18815. // Nested template depth
  18816. obj.depth = token.depth;
  18817. }
  18818. if (token && token.isUnclosed) {
  18819. // Mark token as unclosed string / template literal
  18820. obj.isUnclosed = token.isUnclosed;
  18821. }
  18822. if (isProperty && obj.identifier) {
  18823. obj.isProperty = isProperty;
  18824. }
  18825. obj.check = checks.check;
  18826. return obj;
  18827. }.bind(this);
  18828. for (;;) {
  18829. if (!this.input.length) {
  18830. if (this.nextLine(checks)) {
  18831. return create("(endline)", "");
  18832. }
  18833. if (this.exhausted) {
  18834. return null;
  18835. }
  18836. this.exhausted = true;
  18837. return create("(end)", "");
  18838. }
  18839. token = this.next(checks);
  18840. if (!token) {
  18841. if (this.input.length) {
  18842. // Unexpected character.
  18843. this.trigger("error", {
  18844. code: "E024",
  18845. line: this.line,
  18846. character: this.char,
  18847. data: [ this.peek() ]
  18848. });
  18849. this.input = "";
  18850. }
  18851. continue;
  18852. }
  18853. switch (token.type) {
  18854. case Token.StringLiteral:
  18855. this.triggerAsync("String", {
  18856. line: this.line,
  18857. char: this.char,
  18858. from: this.from,
  18859. startLine: token.startLine,
  18860. startChar: token.startChar,
  18861. value: token.value,
  18862. quote: token.quote
  18863. }, checks, function() { return true; });
  18864. return create("(string)", token.value, null, token);
  18865. case Token.TemplateHead:
  18866. this.trigger("TemplateHead", {
  18867. line: this.line,
  18868. char: this.char,
  18869. from: this.from,
  18870. startLine: token.startLine,
  18871. startChar: token.startChar,
  18872. value: token.value
  18873. });
  18874. return create("(template)", token.value, null, token);
  18875. case Token.TemplateMiddle:
  18876. this.trigger("TemplateMiddle", {
  18877. line: this.line,
  18878. char: this.char,
  18879. from: this.from,
  18880. startLine: token.startLine,
  18881. startChar: token.startChar,
  18882. value: token.value
  18883. });
  18884. return create("(template middle)", token.value, null, token);
  18885. case Token.TemplateTail:
  18886. this.trigger("TemplateTail", {
  18887. line: this.line,
  18888. char: this.char,
  18889. from: this.from,
  18890. startLine: token.startLine,
  18891. startChar: token.startChar,
  18892. value: token.value
  18893. });
  18894. return create("(template tail)", token.value, null, token);
  18895. case Token.NoSubstTemplate:
  18896. this.trigger("NoSubstTemplate", {
  18897. line: this.line,
  18898. char: this.char,
  18899. from: this.from,
  18900. startLine: token.startLine,
  18901. startChar: token.startChar,
  18902. value: token.value
  18903. });
  18904. return create("(no subst template)", token.value, null, token);
  18905. case Token.Identifier:
  18906. this.triggerAsync("Identifier", {
  18907. line: this.line,
  18908. char: this.char,
  18909. from: this.from,
  18910. name: token.value,
  18911. raw_name: token.text,
  18912. isProperty: state.tokens.curr.id === "."
  18913. }, checks, function() { return true; });
  18914. /* falls through */
  18915. case Token.Keyword:
  18916. return create("(identifier)", token.value, state.tokens.curr.id === ".", token);
  18917. case Token.NumericLiteral:
  18918. if (token.isMalformed) {
  18919. // This condition unequivocally describes a syntax error.
  18920. // TODO: Re-factor as an "error" (not a "warning").
  18921. this.trigger("warning", {
  18922. code: "W045",
  18923. line: this.line,
  18924. character: this.char,
  18925. data: [ token.value ]
  18926. });
  18927. }
  18928. this.triggerAsync("warning", {
  18929. code: "W114",
  18930. line: this.line,
  18931. character: this.char,
  18932. data: [ "0x-" ]
  18933. }, checks, function() { return token.base === 16 && state.jsonMode; });
  18934. this.triggerAsync("warning", {
  18935. code: "W115",
  18936. line: this.line,
  18937. character: this.char
  18938. }, checks, function() {
  18939. return state.isStrict() && token.base === 8 && token.isLegacy;
  18940. });
  18941. this.trigger("Number", {
  18942. line: this.line,
  18943. char: this.char,
  18944. from: this.from,
  18945. value: token.value,
  18946. base: token.base,
  18947. isMalformed: token.isMalformed
  18948. });
  18949. return create("(number)", token.value);
  18950. case Token.RegExp:
  18951. return create("(regexp)", token.value);
  18952. case Token.Comment:
  18953. if (token.isSpecial) {
  18954. return {
  18955. id: '(comment)',
  18956. value: token.value,
  18957. body: token.body,
  18958. type: token.commentType,
  18959. isSpecial: token.isSpecial,
  18960. line: this.line,
  18961. character: this.char,
  18962. from: this.from
  18963. };
  18964. }
  18965. break;
  18966. default:
  18967. return create("(punctuator)", token.value);
  18968. }
  18969. }
  18970. }
  18971. };
  18972. exports.Lexer = Lexer;
  18973. exports.Context = Context;
  18974. },{"../data/ascii-identifier-data.js":1,"../data/es5-identifier-names.js":2,"../data/non-ascii-identifier-part-only.js":3,"../data/non-ascii-identifier-start.js":4,"./reg.js":18,"./state.js":20,"events":6,"lodash":13}],15:[function(require,module,exports){
  18975. "use strict";
  18976. var _ = require("lodash");
  18977. var errors = {
  18978. // JSHint options
  18979. E001: "Bad option: '{a}'.",
  18980. E002: "Bad option value.",
  18981. // JSHint input
  18982. E003: "Expected a JSON value.",
  18983. E004: "Input is neither a string nor an array of strings.",
  18984. E005: "Input is empty.",
  18985. E006: "Unexpected early end of program.",
  18986. // Strict mode
  18987. E007: "Missing \"use strict\" statement.",
  18988. E008: "Strict violation.",
  18989. E009: "Option 'validthis' can't be used in a global scope.",
  18990. E010: "'with' is not allowed in strict mode.",
  18991. // Constants
  18992. E011: "'{a}' has already been declared.",
  18993. E012: "const '{a}' is initialized to 'undefined'.",
  18994. E013: "Attempting to override '{a}' which is a constant.",
  18995. // Regular expressions
  18996. E014: "A regular expression literal can be confused with '/='.",
  18997. E015: "Unclosed regular expression.",
  18998. E016: "Invalid regular expression.",
  18999. // Tokens
  19000. E017: "Unclosed comment.",
  19001. E018: "Unbegun comment.",
  19002. E019: "Unmatched '{a}'.",
  19003. E020: "Expected '{a}' to match '{b}' from line {c} and instead saw '{d}'.",
  19004. E021: "Expected '{a}' and instead saw '{b}'.",
  19005. E022: "Line breaking error '{a}'.",
  19006. E023: "Missing '{a}'.",
  19007. E024: "Unexpected '{a}'.",
  19008. E025: "Missing ':' on a case clause.",
  19009. E026: "Missing '}' to match '{' from line {a}.",
  19010. E027: "Missing ']' to match '[' from line {a}.",
  19011. E028: "Illegal comma.",
  19012. E029: "Unclosed string.",
  19013. // Everything else
  19014. E030: "Expected an identifier and instead saw '{a}'.",
  19015. E031: "Bad assignment.", // FIXME: Rephrase
  19016. E032: "Expected a small integer or 'false' and instead saw '{a}'.",
  19017. E033: "Expected an operator and instead saw '{a}'.",
  19018. E034: "get/set are ES5 features.",
  19019. E035: "Missing property name.",
  19020. E036: "Expected to see a statement and instead saw a block.",
  19021. E037: null,
  19022. E038: null,
  19023. E039: "Function declarations are not invocable. Wrap the whole function invocation in parens.",
  19024. E040: "Each value should have its own case label.",
  19025. E041: "Unrecoverable syntax error.",
  19026. E042: "Stopping.",
  19027. E043: "Too many errors.",
  19028. E044: null,
  19029. E045: "Invalid for each loop.",
  19030. E046: "Yield expressions may only occur within generator functions.",
  19031. E047: null,
  19032. E048: "{a} declaration not directly within block.",
  19033. E049: "A {a} cannot be named '{b}'.",
  19034. E050: "Mozilla requires the yield expression to be parenthesized here.",
  19035. E051: null,
  19036. E052: "Unclosed template literal.",
  19037. E053: "{a} declarations are only allowed at the top level of module scope.",
  19038. E054: "Class properties must be methods. Expected '(' but instead saw '{a}'.",
  19039. E055: "The '{a}' option cannot be set after any executable code.",
  19040. E056: "'{a}' was used before it was declared, which is illegal for '{b}' variables.",
  19041. E057: "Invalid meta property: '{a}.{b}'.",
  19042. E058: "Missing semicolon.",
  19043. E059: "Incompatible values for the '{a}' and '{b}' linting options.",
  19044. E060: "Non-callable values cannot be used as the second operand to instanceof.",
  19045. E061: "Invalid position for 'yield' expression (consider wrapping in parenthesis).",
  19046. E062: "Rest parameter does not a support default value.",
  19047. E063: "Super property may only be used within method bodies.",
  19048. E064: "Super call may only be used within class method bodies."
  19049. };
  19050. var warnings = {
  19051. W001: "'hasOwnProperty' is a really bad name.",
  19052. W002: "Value of '{a}' may be overwritten in IE 8 and earlier.",
  19053. W003: "'{a}' was used before it was defined.",
  19054. W004: "'{a}' is already defined.",
  19055. W005: "A dot following a number can be confused with a decimal point.",
  19056. W006: "Confusing minuses.",
  19057. W007: "Confusing plusses.",
  19058. W008: "A leading decimal point can be confused with a dot: '{a}'.",
  19059. W009: "The array literal notation [] is preferable.",
  19060. W010: "The object literal notation {} is preferable.",
  19061. W011: null,
  19062. W012: null,
  19063. W013: null,
  19064. W014: "Misleading line break before '{a}'; readers may interpret this as an expression boundary.",
  19065. W015: null,
  19066. W016: "Unexpected use of '{a}'.",
  19067. W017: "Bad operand.",
  19068. W018: "Confusing use of '{a}'.",
  19069. W019: "Use the isNaN function to compare with NaN.",
  19070. W020: "Read only.",
  19071. W021: "Reassignment of '{a}', which is a {b}. " +
  19072. "Use 'var' or 'let' to declare bindings that may change.",
  19073. W022: "Do not assign to the exception parameter.",
  19074. W023: null,
  19075. W024: "Expected an identifier and instead saw '{a}' (a reserved word).",
  19076. W025: "Missing name in function declaration.",
  19077. W026: "Inner functions should be listed at the top of the outer function.",
  19078. W027: "Unreachable '{a}' after '{b}'.",
  19079. W028: "Label '{a}' on {b} statement.",
  19080. W030: "Expected an assignment or function call and instead saw an expression.",
  19081. W031: "Do not use 'new' for side effects.",
  19082. W032: "Unnecessary semicolon.",
  19083. W033: "Missing semicolon.",
  19084. W034: "Unnecessary directive \"{a}\".",
  19085. W035: "Empty block.",
  19086. W036: "Unexpected /*member '{a}'.",
  19087. W037: "'{a}' is a statement label.",
  19088. W038: "'{a}' used out of scope.",
  19089. W039: "'{a}' is not allowed.",
  19090. W040: "If a strict mode function is executed using function invocation, " +
  19091. "its 'this' value will be undefined.",
  19092. W041: null,
  19093. W042: "Avoid EOL escaping.",
  19094. W043: "Bad escaping of EOL. Use option multistr if needed.",
  19095. W044: "Bad or unnecessary escaping.", /* TODO(caitp): remove W044 */
  19096. W045: "Bad number '{a}'.",
  19097. W046: "Don't use extra leading zeros '{a}'.",
  19098. W047: "A trailing decimal point can be confused with a dot: '{a}'.",
  19099. W048: "Unexpected control character in regular expression.",
  19100. W049: "Unexpected escaped character '{a}' in regular expression.",
  19101. W050: "JavaScript URL.",
  19102. W051: "Variables should not be deleted.",
  19103. W052: "Unexpected '{a}'.",
  19104. W053: "Do not use {a} as a constructor.",
  19105. W054: "The Function constructor is a form of eval.",
  19106. W055: "A constructor name should start with an uppercase letter.",
  19107. W056: "Bad constructor.",
  19108. W057: "Weird construction. Is 'new' necessary?",
  19109. W058: "Missing '()' invoking a constructor.",
  19110. W059: "Avoid arguments.{a}.",
  19111. W060: "document.write can be a form of eval.",
  19112. W061: "eval can be harmful.",
  19113. W062: "Wrap an immediate function invocation in parens " +
  19114. "to assist the reader in understanding that the expression " +
  19115. "is the result of a function, and not the function itself.",
  19116. W063: "Math is not a function.",
  19117. W064: "Missing 'new' prefix when invoking a constructor.",
  19118. W065: "Missing radix parameter.",
  19119. W066: "Implied eval. Consider passing a function instead of a string.",
  19120. W067: "Bad invocation.",
  19121. W068: "Wrapping non-IIFE function literals in parens is unnecessary.",
  19122. W069: "['{a}'] is better written in dot notation.",
  19123. W070: "Extra comma. (it breaks older versions of IE)",
  19124. W071: "This function has too many statements. ({a})",
  19125. W072: "This function has too many parameters. ({a})",
  19126. W073: "Blocks are nested too deeply. ({a})",
  19127. W074: "This function's cyclomatic complexity is too high. ({a})",
  19128. W075: "Duplicate {a} '{b}'.",
  19129. W076: "Unexpected parameter '{a}' in get {b} function.",
  19130. W077: "Expected a single parameter in set {a} function.",
  19131. W078: "Setter is defined without getter.",
  19132. W079: "Redefinition of '{a}'.",
  19133. W080: "It's not necessary to initialize '{a}' to 'undefined'.",
  19134. W081: null,
  19135. W082: "Function declarations should not be placed in blocks. " +
  19136. "Use a function expression or move the statement to the top of " +
  19137. "the outer function.",
  19138. W083: "Functions declared within loops referencing an outer scoped " +
  19139. "variable may lead to confusing semantics. ({a})",
  19140. W084: "Expected a conditional expression and instead saw an assignment.",
  19141. W085: "Don't use 'with'.",
  19142. W086: "Expected a 'break' statement before '{a}'.",
  19143. W087: "Forgotten 'debugger' statement?",
  19144. W088: "Creating global 'for' variable. Should be 'for (var {a} ...'.",
  19145. W089: "The body of a for in should be wrapped in an if statement to filter " +
  19146. "unwanted properties from the prototype.",
  19147. W090: "'{a}' is not a statement label.",
  19148. W091: null,
  19149. W093: "Did you mean to return a conditional instead of an assignment?",
  19150. W094: "Unexpected comma.",
  19151. W095: "Expected a string and instead saw {a}.",
  19152. W096: "The '{a}' key may produce unexpected results.",
  19153. W097: "Use the function form of \"use strict\".",
  19154. W098: "'{a}' is defined but never used.",
  19155. W099: null,
  19156. W100: null,
  19157. W101: "Line is too long.",
  19158. W102: null,
  19159. W103: "The '{a}' property is deprecated.",
  19160. W104: "'{a}' is available in ES{b} (use 'esversion: {b}') or Mozilla JS extensions (use moz).",
  19161. W105: "Unexpected {a} in '{b}'.",
  19162. W106: "Identifier '{a}' is not in camel case.",
  19163. W107: "Script URL.",
  19164. W108: "Strings must use doublequote.",
  19165. W109: "Strings must use singlequote.",
  19166. W110: "Mixed double and single quotes.",
  19167. W112: "Unclosed string.",
  19168. W113: "Control character in string: {a}.",
  19169. W114: "Avoid {a}.",
  19170. W115: "Octal literals are not allowed in strict mode.",
  19171. W116: "Expected '{a}' and instead saw '{b}'.",
  19172. W117: "'{a}' is not defined.",
  19173. W118: "'{a}' is only available in Mozilla JavaScript extensions (use moz option).",
  19174. W119: "'{a}' is only available in ES{b} (use 'esversion: {b}').",
  19175. W120: "You might be leaking a variable ({a}) here.",
  19176. W121: "Extending prototype of native object: '{a}'.",
  19177. W122: "Invalid typeof value '{a}'",
  19178. W123: "'{a}' is already defined in outer scope.",
  19179. W124: "A generator function should contain at least one yield expression.",
  19180. W125: "This line contains non-breaking spaces: http://jshint.com/docs/options/#nonbsp",
  19181. W126: "Unnecessary grouping operator.",
  19182. W127: "Unexpected use of a comma operator.",
  19183. W128: "Empty array elements require elision=true.",
  19184. W129: "'{a}' is defined in a future version of JavaScript. Use a " +
  19185. "different variable name to avoid migration issues.",
  19186. W130: "Invalid element after rest element.",
  19187. W131: "Invalid parameter after rest parameter.",
  19188. W132: "`var` declarations are forbidden. Use `let` or `const` instead.",
  19189. W133: "Invalid for-{a} loop left-hand-side: {b}.",
  19190. W134: "The '{a}' option is only available when linting ECMAScript {b} code.",
  19191. W135: "{a} may not be supported by non-browser environments.",
  19192. W136: "'{a}' must be in function scope.",
  19193. W137: "Empty destructuring: this is unnecessary and can be removed.",
  19194. W138: "Regular parameters should not come after default parameters.",
  19195. W139: "Function expressions should not be used as the second operand to instanceof.",
  19196. W140: "Missing comma.",
  19197. W141: "Empty {a}: this is unnecessary and can be removed.",
  19198. W142: "Empty {a}: consider replacing with `import '{b}';`.",
  19199. W143: "Assignment to properties of a mapped arguments object may cause " +
  19200. "unexpected changes to formal parameters."
  19201. };
  19202. var info = {
  19203. I001: "Comma warnings can be turned off with 'laxcomma'.",
  19204. I002: null,
  19205. I003: "ES5 option is now set per default"
  19206. };
  19207. exports.errors = {};
  19208. exports.warnings = {};
  19209. exports.info = {};
  19210. _.each(errors, function(desc, code) {
  19211. exports.errors[code] = { code: code, desc: desc };
  19212. });
  19213. _.each(warnings, function(desc, code) {
  19214. exports.warnings[code] = { code: code, desc: desc };
  19215. });
  19216. _.each(info, function(desc, code) {
  19217. exports.info[code] = { code: code, desc: desc };
  19218. });
  19219. },{"lodash":13}],16:[function(require,module,exports){
  19220. "use strict";
  19221. function NameStack() {
  19222. this._stack = [];
  19223. }
  19224. Object.defineProperty(NameStack.prototype, "length", {
  19225. get: function() {
  19226. return this._stack.length;
  19227. }
  19228. });
  19229. /**
  19230. * Create a new entry in the stack. Useful for tracking names across
  19231. * expressions.
  19232. */
  19233. NameStack.prototype.push = function() {
  19234. this._stack.push(null);
  19235. };
  19236. /**
  19237. * Discard the most recently-created name on the stack.
  19238. */
  19239. NameStack.prototype.pop = function() {
  19240. this._stack.pop();
  19241. };
  19242. /**
  19243. * Update the most recent name on the top of the stack.
  19244. *
  19245. * @param {object} token The token to consider as the source for the most
  19246. * recent name.
  19247. */
  19248. NameStack.prototype.set = function(token) {
  19249. this._stack[this.length - 1] = token;
  19250. };
  19251. /**
  19252. * Generate a string representation of the most recent name.
  19253. *
  19254. * @returns {string}
  19255. */
  19256. NameStack.prototype.infer = function() {
  19257. var nameToken = this._stack[this.length - 1];
  19258. var prefix = "";
  19259. var type;
  19260. // During expected operation, the topmost entry on the stack will only
  19261. // reflect the current function's name when the function is declared without
  19262. // the `function` keyword (i.e. for in-line accessor methods). In other
  19263. // cases, the `function` expression itself will introduce an empty entry on
  19264. // the top of the stack, and this should be ignored.
  19265. if (!nameToken || nameToken.type === "class") {
  19266. nameToken = this._stack[this.length - 2];
  19267. }
  19268. if (!nameToken) {
  19269. return "(empty)";
  19270. }
  19271. type = nameToken.type;
  19272. if (type !== "(string)" && type !== "(number)" && type !== "(identifier)" && type !== "default") {
  19273. return "(expression)";
  19274. }
  19275. if (nameToken.accessorType) {
  19276. prefix = nameToken.accessorType + " ";
  19277. }
  19278. return prefix + nameToken.value;
  19279. };
  19280. module.exports = NameStack;
  19281. },{}],17:[function(require,module,exports){
  19282. "use strict";
  19283. // These are the JSHint boolean options.
  19284. exports.bool = {
  19285. enforcing: {
  19286. /**
  19287. * This option prohibits the use of bitwise operators such as `^` (XOR),
  19288. * `|` (OR) and others. Bitwise operators are very rare in JavaScript
  19289. * programs and quite often `&` is simply a mistyped `&&`.
  19290. */
  19291. bitwise : true,
  19292. /**
  19293. *
  19294. * This options prohibits overwriting prototypes of native objects such as
  19295. * `Array`, `Date` and so on.
  19296. *
  19297. * // jshint freeze:true
  19298. * Array.prototype.count = function (value) { return 4; };
  19299. * // -> Warning: Extending prototype of native object: 'Array'.
  19300. */
  19301. freeze : true,
  19302. /**
  19303. * This option allows you to force all variable names to use either
  19304. * camelCase style or UPPER_CASE with underscores.
  19305. *
  19306. * @deprecated JSHint is limiting its scope to issues of code correctness.
  19307. * If you would like to enforce rules relating to code style,
  19308. * check out [the JSCS
  19309. * project](https://github.com/jscs-dev/node-jscs).
  19310. */
  19311. camelcase : true,
  19312. /**
  19313. * This option requires you to always put curly braces around blocks in
  19314. * loops and conditionals. JavaScript allows you to omit curly braces when
  19315. * the block consists of only one statement, for example:
  19316. *
  19317. * while (day)
  19318. * shuffle();
  19319. *
  19320. * However, in some circumstances, it can lead to bugs (you'd think that
  19321. * `sleep()` is a part of the loop while in reality it is not):
  19322. *
  19323. * while (day)
  19324. * shuffle();
  19325. * sleep();
  19326. */
  19327. curly : true,
  19328. /**
  19329. * This options prohibits the use of `==` and `!=` in favor of `===` and
  19330. * `!==`. The former try to coerce values before comparing them which can
  19331. * lead to some unexpected results. The latter don't do any coercion so
  19332. * they are generally safer. If you would like to learn more about type
  19333. * coercion in JavaScript, we recommend [Truth, Equality and
  19334. * JavaScript](http://javascriptweblog.wordpress.com/2011/02/07/truth-equality-and-javascript/)
  19335. * by Angus Croll.
  19336. */
  19337. eqeqeq : true,
  19338. /**
  19339. * This option enables warnings about the use of identifiers which are
  19340. * defined in future versions of JavaScript. Although overwriting them has
  19341. * no effect in contexts where they are not implemented, this practice can
  19342. * cause issues when migrating codebases to newer versions of the language.
  19343. */
  19344. futurehostile: true,
  19345. /**
  19346. * This option tells JSHint that your code needs to adhere to ECMAScript 3
  19347. * specification. Use this option if you need your program to be executable
  19348. * in older browsers—such as Internet Explorer 6/7/8/9—and other legacy
  19349. * JavaScript environments.
  19350. *
  19351. * @deprecated Use `esversion: 3` instead.
  19352. */
  19353. es3 : true,
  19354. /**
  19355. * This option enables syntax first defined in [the ECMAScript 5.1
  19356. * specification](http://es5.github.io/). This includes allowing reserved
  19357. * keywords as object properties.
  19358. *
  19359. * @deprecated Use `esversion: 5` instead.
  19360. */
  19361. es5 : true,
  19362. /**
  19363. * This option requires all `for in` loops to filter object's items. The
  19364. * for in statement allows for looping through the names of all of the
  19365. * properties of an object including those inherited through the prototype
  19366. * chain. This behavior can lead to unexpected items in your object so it
  19367. * is generally safer to always filter inherited properties out as shown in
  19368. * the example:
  19369. *
  19370. * for (key in obj) {
  19371. * if (obj.hasOwnProperty(key)) {
  19372. * // We are sure that obj[key] belongs to the object and was not inherited.
  19373. * }
  19374. * }
  19375. *
  19376. * For more in-depth understanding of `for in` loops in JavaScript, read
  19377. * [Exploring JavaScript for-in
  19378. * loops](http://javascriptweblog.wordpress.com/2011/01/04/exploring-javascript-for-in-loops/)
  19379. * by Angus Croll.
  19380. */
  19381. forin : true,
  19382. /**
  19383. * This option prohibits the use of immediate function invocations without
  19384. * wrapping them in parentheses. Wrapping parentheses assists readers of
  19385. * your code in understanding that the expression is the result of a
  19386. * function, and not the function itself.
  19387. *
  19388. * @deprecated JSHint is limiting its scope to issues of code correctness.
  19389. * If you would like to enforce rules relating to code style,
  19390. * check out [the JSCS
  19391. * project](https://github.com/jscs-dev/node-jscs).
  19392. */
  19393. immed : true,
  19394. /**
  19395. * This option requires you to capitalize names of constructor functions.
  19396. * Capitalizing functions that are intended to be used with `new` operator
  19397. * is just a convention that helps programmers to visually distinguish
  19398. * constructor functions from other types of functions to help spot
  19399. * mistakes when using `this`.
  19400. *
  19401. * Not doing so won't break your code in any browsers or environments but
  19402. * it will be a bit harder to figure out—by reading the code—if the
  19403. * function was supposed to be used with or without new. And this is
  19404. * important because when the function that was intended to be used with
  19405. * `new` is used without it, `this` will point to the global object instead
  19406. * of a new object.
  19407. *
  19408. * @deprecated JSHint is limiting its scope to issues of code correctness.
  19409. * If you would like to enforce rules relating to code style,
  19410. * check out [the JSCS
  19411. * project](https://github.com/jscs-dev/node-jscs).
  19412. */
  19413. newcap : true,
  19414. /**
  19415. * This option prohibits the use of `arguments.caller` and
  19416. * `arguments.callee`. Both `.caller` and `.callee` make quite a few
  19417. * optimizations impossible so they were deprecated in future versions of
  19418. * JavaScript. In fact, ECMAScript 5 forbids the use of `arguments.callee`
  19419. * in strict mode.
  19420. */
  19421. noarg : true,
  19422. /**
  19423. * This option prohibits the use of the comma operator. When misused, the
  19424. * comma operator can obscure the value of a statement and promote
  19425. * incorrect code.
  19426. */
  19427. nocomma : true,
  19428. /**
  19429. * This option warns when you have an empty block in your code. JSLint was
  19430. * originally warning for all empty blocks and we simply made it optional.
  19431. * There were no studies reporting that empty blocks in JavaScript break
  19432. * your code in any way.
  19433. *
  19434. * @deprecated JSHint is limiting its scope to issues of code correctness.
  19435. * If you would like to enforce rules relating to code style,
  19436. * check out [the JSCS
  19437. * project](https://github.com/jscs-dev/node-jscs).
  19438. */
  19439. noempty : true,
  19440. /**
  19441. * This option warns about "non-breaking whitespace" characters. These
  19442. * characters can be entered with option-space on Mac computers and have a
  19443. * potential of breaking non-UTF8 web pages.
  19444. */
  19445. nonbsp : true,
  19446. /**
  19447. * This option prohibits the use of constructor functions for side-effects.
  19448. * Some people like to call constructor functions without assigning its
  19449. * result to any variable:
  19450. *
  19451. * new MyConstructor();
  19452. *
  19453. * There is no advantage in this approach over simply calling
  19454. * `MyConstructor` since the object that the operator `new` creates isn't
  19455. * used anywhere so you should generally avoid constructors like this one.
  19456. */
  19457. nonew : true,
  19458. /**
  19459. * This option prohibits the use of explicitly undeclared variables. This
  19460. * option is very useful for spotting leaking and mistyped variables.
  19461. *
  19462. * // jshint undef:true
  19463. *
  19464. * function test() {
  19465. * var myVar = 'Hello, World';
  19466. * console.log(myvar); // Oops, typoed here. JSHint with undef will complain
  19467. * }
  19468. *
  19469. * If your variable is defined in another file, you can use the `global`
  19470. * directive to tell JSHint about it.
  19471. */
  19472. undef : true,
  19473. /**
  19474. * This option prohibits the use of the grouping operator when it is not
  19475. * strictly required. Such usage commonly reflects a misunderstanding of
  19476. * unary operators, for example:
  19477. *
  19478. * // jshint singleGroups: true
  19479. *
  19480. * delete(obj.attr); // Warning: Unnecessary grouping operator.
  19481. */
  19482. singleGroups: false,
  19483. /**
  19484. * When set to true, the use of VariableStatements are forbidden.
  19485. * For example:
  19486. *
  19487. * // jshint varstmt: true
  19488. *
  19489. * var a; // Warning: `var` declarations are forbidden. Use `let` or `const` instead.
  19490. */
  19491. varstmt: false,
  19492. /**
  19493. * This option is a short hand for the most strict JSHint configuration as
  19494. * available in JSHint version 2.6.3. It enables all enforcing options and
  19495. * disables all relaxing options that were defined in that release.
  19496. *
  19497. * @deprecated The option cannot be maintained without automatically opting
  19498. * users in to new features. This can lead to unexpected
  19499. * warnings/errors in when upgrading between minor versions of
  19500. * JSHint.
  19501. */
  19502. enforceall : false,
  19503. /**
  19504. * This option warns when a comma is not placed after the last element in an
  19505. * array or object literal. Due to bugs in old versions of IE, trailing
  19506. * commas used to be discouraged, but since ES5 their semantics were
  19507. * standardized. (See
  19508. * [#11.1.4](http://www.ecma-international.org/ecma-262/5.1/#sec-11.1.4) and
  19509. * [#11.1.5](http://www.ecma-international.org/ecma-262/5.1/#sec-11.1.5).)
  19510. * Now, they help to prevent the same [visual
  19511. * ambiguities](http://www.ecma-international.org/ecma-262/5.1/#sec-7.9.2)
  19512. * that the strict usage of semicolons helps prevent.
  19513. *
  19514. * For example, this code might have worked last Tuesday:
  19515. *
  19516. * [
  19517. * b + c
  19518. * ].forEach(print);
  19519. *
  19520. * But if one adds an element to the array and forgets to compensate for the
  19521. * missing comma, no syntax error is thrown, and a linter cannot determine
  19522. * if this was a mistake or an intentional function invocation.
  19523. *
  19524. * [
  19525. * b + c
  19526. * (d + e)
  19527. * ].forEach(print);
  19528. *
  19529. * If one always appends a list item with a comma, this ambiguity cannot
  19530. * occur:
  19531. *
  19532. * [
  19533. * b + c,
  19534. * ].forEach(print);
  19535. *
  19536. * [
  19537. * b + c,
  19538. * (d + e),
  19539. * ].forEach(print);
  19540. */
  19541. trailingcomma: false
  19542. },
  19543. relaxing: {
  19544. /**
  19545. * This option suppresses warnings about missing semicolons. There is a lot
  19546. * of FUD about semicolon spread by quite a few people in the community.
  19547. * The common myths are that semicolons are required all the time (they are
  19548. * not) and that they are unreliable. JavaScript has rules about semicolons
  19549. * which are followed by *all* browsers so it is up to you to decide
  19550. * whether you should or should not use semicolons in your code.
  19551. *
  19552. * For more information about semicolons in JavaScript read [An Open Letter
  19553. * to JavaScript Leaders Regarding
  19554. * Semicolons](http://blog.izs.me/post/2353458699/an-open-letter-to-javascript-leaders-regarding)
  19555. * by Isaac Schlueter and [JavaScript Semicolon
  19556. * Insertion](http://inimino.org/~inimino/blog/javascript_semicolons).
  19557. */
  19558. asi : true,
  19559. /**
  19560. * This option suppresses warnings about multi-line strings. Multi-line
  19561. * strings can be dangerous in JavaScript because all hell breaks loose if
  19562. * you accidentally put a whitespace in between the escape character (`\`)
  19563. * and a new line.
  19564. *
  19565. * Note that even though this option allows correct multi-line strings, it
  19566. * still warns about multi-line strings without escape characters or with
  19567. * anything in between the escape character and a whitespace.
  19568. *
  19569. * // jshint multistr:true
  19570. *
  19571. * var text = "Hello\
  19572. * World"; // All good.
  19573. *
  19574. * text = "Hello
  19575. * World"; // Warning, no escape character.
  19576. *
  19577. * text = "Hello\
  19578. * World"; // Warning, there is a space after \
  19579. *
  19580. * @deprecated JSHint is limiting its scope to issues of code correctness.
  19581. * If you would like to enforce rules relating to code style,
  19582. * check out [the JSCS
  19583. * project](https://github.com/jscs-dev/node-jscs).
  19584. */
  19585. multistr : true,
  19586. /**
  19587. * This option suppresses warnings about the `debugger` statements in your
  19588. * code.
  19589. */
  19590. debug : true,
  19591. /**
  19592. * This option suppresses warnings about the use of assignments in cases
  19593. * where comparisons are expected. More often than not, code like `if (a =
  19594. * 10) {}` is a typo. However, it can be useful in cases like this one:
  19595. *
  19596. * for (var i = 0, person; person = people[i]; i++) {}
  19597. *
  19598. * You can silence this error on a per-use basis by surrounding the assignment
  19599. * with parenthesis, such as:
  19600. *
  19601. * for (var i = 0, person; (person = people[i]); i++) {}
  19602. */
  19603. boss : true,
  19604. /**
  19605. * This option suppresses warnings about the use of `eval`. The use of
  19606. * `eval` is discouraged because it can make your code vulnerable to
  19607. * various injection attacks and it makes it hard for JavaScript
  19608. * interpreter to do certain optimizations.
  19609. */
  19610. evil : true,
  19611. /**
  19612. * This option suppresses warnings about declaring variables inside
  19613. * of control structures while accessing them later from the outside.
  19614. * Even though identifiers declared with `var` have two real scopes—global
  19615. * and function—such practice leads to confusion among people new to
  19616. * the language and hard-to-debug bugs. This is why, by default, JSHint
  19617. * warns about variables that are used outside of their intended scope.
  19618. *
  19619. * function test() {
  19620. * if (true) {
  19621. * var x = 0;
  19622. * }
  19623. *
  19624. * x += 1; // Default: 'x' used out of scope.
  19625. * // No warning when funcscope:true
  19626. * }
  19627. */
  19628. funcscope : true,
  19629. /**
  19630. * This option suppresses warnings about the use of global strict mode.
  19631. * Global strict mode can break third-party widgets so it is not
  19632. * recommended.
  19633. *
  19634. * For more info about strict mode see the `strict` option.
  19635. *
  19636. * @deprecated Use `strict: "global"`.
  19637. */
  19638. globalstrict: true,
  19639. /**
  19640. * This option suppresses warnings about the `__iterator__` property. This
  19641. * property is not supported by all browsers so use it carefully.
  19642. */
  19643. iterator : true,
  19644. /**
  19645. * This option suppresses warnings about invalid `typeof` operator values.
  19646. * This operator has only [a limited set of possible return
  19647. * values](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/typeof).
  19648. * By default, JSHint warns when you compare its result with an invalid
  19649. * value which often can be a typo.
  19650. *
  19651. * // 'fuction' instead of 'function'
  19652. * if (typeof a == "fuction") { // Invalid typeof value 'fuction'
  19653. * // ...
  19654. * }
  19655. *
  19656. * Do not use this option unless you're absolutely sure you don't want
  19657. * these checks.
  19658. */
  19659. notypeof : true,
  19660. /**
  19661. * This option prohibits the use of unary increment and decrement
  19662. * operators. Some people think that `++` and `--` reduces the quality of
  19663. * their coding styles and there are programming languages—such as
  19664. * Python—that go completely without these operators.
  19665. */
  19666. plusplus : true,
  19667. /**
  19668. * This option suppresses warnings about the `__proto__` property.
  19669. */
  19670. proto : true,
  19671. /**
  19672. * This option suppresses warnings about the use of script-targeted
  19673. * URLs—such as `javascript:...`.
  19674. */
  19675. scripturl : true,
  19676. /**
  19677. * This option suppresses warnings about using `[]` notation when it can be
  19678. * expressed in dot notation: `person['name']` vs. `person.name`.
  19679. *
  19680. * @deprecated JSHint is limiting its scope to issues of code correctness.
  19681. * If you would like to enforce rules relating to code style,
  19682. * check out [the JSCS
  19683. * project](https://github.com/jscs-dev/node-jscs).
  19684. */
  19685. sub : true,
  19686. /**
  19687. * This option suppresses warnings about "weird" constructions like
  19688. * `new function () { ... }` and `new Object;`. Such constructions are
  19689. * sometimes used to produce singletons in JavaScript:
  19690. *
  19691. * var singleton = new function() {
  19692. * var privateVar;
  19693. *
  19694. * this.publicMethod = function () {}
  19695. * this.publicMethod2 = function () {}
  19696. * };
  19697. */
  19698. supernew : true,
  19699. /**
  19700. * This option suppresses most of the warnings about possibly unsafe line
  19701. * breakings in your code. It doesn't suppress warnings about comma-first
  19702. * coding style. To suppress those you have to use `laxcomma` (see below).
  19703. *
  19704. * @deprecated JSHint is limiting its scope to issues of code correctness.
  19705. * If you would like to enforce rules relating to code style,
  19706. * check out [the JSCS
  19707. * project](https://github.com/jscs-dev/node-jscs).
  19708. */
  19709. laxbreak : true,
  19710. /**
  19711. * This option suppresses warnings about comma-first coding style:
  19712. *
  19713. * var obj = {
  19714. * name: 'Anton'
  19715. * , handle: 'valueof'
  19716. * , role: 'SW Engineer'
  19717. * };
  19718. *
  19719. * @deprecated JSHint is limiting its scope to issues of code correctness.
  19720. * If you would like to enforce rules relating to code style,
  19721. * check out [the JSCS
  19722. * project](https://github.com/jscs-dev/node-jscs).
  19723. */
  19724. laxcomma : true,
  19725. /**
  19726. * This option suppresses warnings about possible strict violations when
  19727. * the code is running in strict mode and you use `this` in a
  19728. * non-constructor function. You should use this option—in a function scope
  19729. * only—when you are positive that your use of `this` is valid in the
  19730. * strict mode (for example, if you call your function using
  19731. * `Function.call`).
  19732. *
  19733. * **Note:** This option can be used only inside of a function scope.
  19734. * JSHint will fail with an error if you will try to set this option
  19735. * globally.
  19736. */
  19737. validthis : true,
  19738. /**
  19739. * This option suppresses warnings about the use of the `with` statement.
  19740. * The semantics of the `with` statement can cause confusion among
  19741. * developers and accidental definition of global variables.
  19742. *
  19743. * More info:
  19744. *
  19745. * * [with Statement Considered
  19746. * Harmful](http://yuiblog.com/blog/2006/04/11/with-statement-considered-harmful/)
  19747. */
  19748. withstmt : true,
  19749. /**
  19750. * This options tells JSHint that your code uses Mozilla JavaScript
  19751. * extensions. Unless you develop specifically for the Firefox web browser
  19752. * you don't need this option.
  19753. *
  19754. * More info:
  19755. *
  19756. * * [New in JavaScript
  19757. * 1.7](https://developer.mozilla.org/en-US/docs/JavaScript/New_in_JavaScript/1.7)
  19758. */
  19759. moz : true,
  19760. /**
  19761. * This option suppresses warnings about generator functions with no
  19762. * `yield` statement in them.
  19763. */
  19764. noyield : true,
  19765. /**
  19766. * This option suppresses warnings about `== null` comparisons. Such
  19767. * comparisons are often useful when you want to check if a variable is
  19768. * `null` or `undefined`.
  19769. */
  19770. eqnull : true,
  19771. /**
  19772. * This option suppresses warnings about missing semicolons, but only when
  19773. * the semicolon is omitted for the last statement in a one-line block:
  19774. *
  19775. * var name = (function() { return 'Anton' }());
  19776. *
  19777. * This is a very niche use case that is useful only when you use automatic
  19778. * JavaScript code generators.
  19779. */
  19780. lastsemic : true,
  19781. /**
  19782. * This option suppresses warnings about functions inside of loops.
  19783. * Defining functions inside of loops can lead to bugs such as this one:
  19784. *
  19785. * var nums = [];
  19786. *
  19787. * for (var i = 0; i < 10; i++) {
  19788. * nums[i] = function (j) {
  19789. * return i + j;
  19790. * };
  19791. * }
  19792. *
  19793. * nums[0](2); // Prints 12 instead of 2
  19794. *
  19795. * To fix the code above you need to copy the value of `i`:
  19796. *
  19797. * var nums = [];
  19798. *
  19799. * for (var i = 0; i < 10; i++) {
  19800. * (function (i) {
  19801. * nums[i] = function (j) {
  19802. * return i + j;
  19803. * };
  19804. * }(i));
  19805. * }
  19806. */
  19807. loopfunc : true,
  19808. /**
  19809. * This option suppresses warnings about the use of expressions where
  19810. * normally you would expect to see assignments or function calls. Most of
  19811. * the time, such code is a typo. However, it is not forbidden by the spec
  19812. * and that's why this warning is optional.
  19813. */
  19814. expr : true,
  19815. /**
  19816. * This option tells JSHint that your code uses ECMAScript 6 specific
  19817. * syntax. Note that not all browsers implement these features.
  19818. *
  19819. * More info:
  19820. *
  19821. * * [Specification for ECMAScript
  19822. * 6](http://www.ecma-international.org/ecma-262/6.0/index.html)
  19823. *
  19824. * @deprecated Use `esversion: 6` instead.
  19825. */
  19826. esnext : true,
  19827. /**
  19828. * This option tells JSHint that your code uses ES3 array elision elements,
  19829. * or empty elements (for example, `[1, , , 4, , , 7]`).
  19830. */
  19831. elision : true,
  19832. },
  19833. // Third party globals
  19834. environments: {
  19835. /**
  19836. * This option defines globals exposed by the
  19837. * [MooTools](http://mootools.net/) JavaScript framework.
  19838. */
  19839. mootools : true,
  19840. /**
  19841. * This option defines globals exposed by
  19842. * [CouchDB](http://couchdb.apache.org/). CouchDB is a document-oriented
  19843. * database that can be queried and indexed in a MapReduce fashion using
  19844. * JavaScript.
  19845. */
  19846. couch : true,
  19847. /**
  19848. * This option defines globals exposed by [the Jasmine unit testing
  19849. * framework](https://jasmine.github.io/).
  19850. */
  19851. jasmine : true,
  19852. /**
  19853. * This option defines globals exposed by the [jQuery](http://jquery.com/)
  19854. * JavaScript library.
  19855. */
  19856. jquery : true,
  19857. /**
  19858. * This option defines globals available when your code is running inside
  19859. * of the Node runtime environment. [Node.js](http://nodejs.org/) is a
  19860. * server-side JavaScript environment that uses an asynchronous
  19861. * event-driven model. This option also skips some warnings that make sense
  19862. * in the browser environments but don't make sense in Node such as
  19863. * file-level `use strict` pragmas and `console.log` statements.
  19864. */
  19865. node : true,
  19866. /**
  19867. * This option defines globals exposed by [the QUnit unit testing
  19868. * framework](http://qunitjs.com/).
  19869. */
  19870. qunit : true,
  19871. /**
  19872. * This option defines globals available when your code is running inside
  19873. * of the Rhino runtime environment. [Rhino](http://www.mozilla.org/rhino/)
  19874. * is an open-source implementation of JavaScript written entirely in Java.
  19875. */
  19876. rhino : true,
  19877. /**
  19878. * This option defines globals exposed by [the ShellJS
  19879. * library](http://documentup.com/arturadib/shelljs).
  19880. */
  19881. shelljs : true,
  19882. /**
  19883. * This option defines globals exposed by the
  19884. * [Prototype](http://www.prototypejs.org/) JavaScript framework.
  19885. */
  19886. prototypejs : true,
  19887. /**
  19888. * This option defines globals exposed by the [YUI](http://yuilibrary.com/)
  19889. * JavaScript framework.
  19890. */
  19891. yui : true,
  19892. /**
  19893. * This option defines globals exposed by the "BDD" and "TDD" UIs of the
  19894. * [Mocha unit testing framework](http://mochajs.org/).
  19895. */
  19896. mocha : true,
  19897. /**
  19898. * This option informs JSHint that the input code describes an ECMAScript 6
  19899. * module. All module code is interpreted as strict mode code.
  19900. */
  19901. module : true,
  19902. /**
  19903. * This option defines globals available when your code is running as a
  19904. * script for the [Windows Script
  19905. * Host](http://en.wikipedia.org/wiki/Windows_Script_Host).
  19906. */
  19907. wsh : true,
  19908. /**
  19909. * This option defines globals available when your code is running inside
  19910. * of a Web Worker. [Web
  19911. * Workers](https://developer.mozilla.org/en/Using_web_workers) provide a
  19912. * simple means for web content to run scripts in background threads.
  19913. */
  19914. worker : true,
  19915. /**
  19916. * This option defines non-standard but widely adopted globals such as
  19917. * `escape` and `unescape`.
  19918. */
  19919. nonstandard : true,
  19920. /**
  19921. * This option defines globals exposed by modern browsers: all the way from
  19922. * good old `document` and `navigator` to the HTML5 `FileReader` and other
  19923. * new developments in the browser world.
  19924. *
  19925. * **Note:** This option doesn't expose variables like `alert` or
  19926. * `console`. See option `devel` for more information.
  19927. */
  19928. browser : true,
  19929. /**
  19930. * This option defines globals available when using [the Browserify
  19931. * tool](http://browserify.org/) to build a project.
  19932. */
  19933. browserify : true,
  19934. /**
  19935. * This option defines globals that are usually used for logging poor-man's
  19936. * debugging: `console`, `alert`, etc. It is usually a good idea to not
  19937. * ship them in production because, for example, `console.log` breaks in
  19938. * legacy versions of Internet Explorer.
  19939. */
  19940. devel : true,
  19941. /**
  19942. * This option defines globals exposed by the [Dojo
  19943. * Toolkit](http://dojotoolkit.org/).
  19944. */
  19945. dojo : true,
  19946. /**
  19947. * This option defines globals for typed array constructors.
  19948. *
  19949. * More info:
  19950. *
  19951. * * [JavaScript typed
  19952. * arrays](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Typed_arrays)
  19953. */
  19954. typed : true,
  19955. /**
  19956. * This option defines globals available when your core is running inside
  19957. * of the PhantomJS runtime environment. [PhantomJS](http://phantomjs.org/)
  19958. * is a headless WebKit scriptable with a JavaScript API. It has fast and
  19959. * native support for various web standards: DOM handling, CSS selector,
  19960. * JSON, Canvas, and SVG.
  19961. */
  19962. phantom : true
  19963. },
  19964. // Obsolete options
  19965. obsolete: {
  19966. onecase : true, // if one case switch statements should be allowed
  19967. regexp : true, // if the . should not be allowed in regexp literals
  19968. regexdash : true // if unescaped first/last dash (-) inside brackets
  19969. // should be tolerated
  19970. }
  19971. };
  19972. // These are the JSHint options that can take any value
  19973. // (we use this object to detect invalid options)
  19974. exports.val = {
  19975. /**
  19976. * This option lets you set the maximum length of a line.
  19977. *
  19978. * @deprecated JSHint is limiting its scope to issues of code correctness. If
  19979. * you would like to enforce rules relating to code style, check
  19980. * out [the JSCS project](https://github.com/jscs-dev/node-jscs).
  19981. */
  19982. maxlen : false,
  19983. /**
  19984. * This option sets a specific tab width for your code.
  19985. *
  19986. * @deprecated JSHint is limiting its scope to issues of code correctness. If
  19987. * you would like to enforce rules relating to code style, check
  19988. * out [the JSCS project](https://github.com/jscs-dev/node-jscs).
  19989. */
  19990. indent : false,
  19991. /**
  19992. * This options allows you to set the maximum amount of warnings JSHint will
  19993. * produce before giving up. Default is 50.
  19994. */
  19995. maxerr : false,
  19996. /**
  19997. * This option allows you to control which variables JSHint considers to be
  19998. * implicitly defined in the environment. Configure it with an array of
  19999. * string values. Prefixing a variable name with a hyphen (-) character will
  20000. * remove that name from the collection of predefined variables.
  20001. *
  20002. * JSHint will consider variables declared in this way to be read-only.
  20003. *
  20004. * This option cannot be specified in-line; it may only be used via the
  20005. * JavaScript API or from an external configuration file.
  20006. */
  20007. predef : false,
  20008. /**
  20009. * This option can be used to specify a white list of global variables that
  20010. * are not formally defined in the source code. This is most useful when
  20011. * combined with the `undef` option in order to suppress warnings for
  20012. * project-specific global variables.
  20013. *
  20014. * Setting an entry to `true` enables reading and writing to that variable.
  20015. * Setting it to `false` will trigger JSHint to consider that variable
  20016. * read-only.
  20017. *
  20018. * See also the "environment" options: a set of options to be used as short
  20019. * hand for enabling global variables defined in common JavaScript
  20020. * environments.
  20021. *
  20022. * To configure `globals` within an individual file, see [Inline
  20023. * Configuration](http://jshint.com/docs/#inline-configuration).
  20024. */
  20025. globals : false,
  20026. /**
  20027. * This option enforces the consistency of quotation marks used throughout
  20028. * your code. It accepts three values: `true` if you don't want to enforce
  20029. * one particular style but want some consistency, `"single"` if you want to
  20030. * allow only single quotes and `"double"` if you want to allow only double
  20031. * quotes.
  20032. *
  20033. * @deprecated JSHint is limiting its scope to issues of code correctness. If
  20034. * you would like to enforce rules relating to code style, check
  20035. * out [the JSCS project](https://github.com/jscs-dev/node-jscs).
  20036. */
  20037. quotmark : false,
  20038. scope : false,
  20039. /**
  20040. * This option lets you set the max number of statements allowed per function:
  20041. *
  20042. * // jshint maxstatements:4
  20043. *
  20044. * function main() {
  20045. * var i = 0;
  20046. * var j = 0;
  20047. *
  20048. * // Function declarations count as one statement. Their bodies
  20049. * // don't get taken into account for the outer function.
  20050. * function inner() {
  20051. * var i2 = 1;
  20052. * var j2 = 1;
  20053. *
  20054. * return i2 + j2;
  20055. * }
  20056. *
  20057. * j = i + j;
  20058. * return j; // JSHint: Too many statements per function. (5)
  20059. * }
  20060. */
  20061. maxstatements: false,
  20062. /**
  20063. * This option lets you control how nested do you want your blocks to be:
  20064. *
  20065. * // jshint maxdepth:2
  20066. *
  20067. * function main(meaning) {
  20068. * var day = true;
  20069. *
  20070. * if (meaning === 42) {
  20071. * while (day) {
  20072. * shuffle();
  20073. *
  20074. * if (tired) { // JSHint: Blocks are nested too deeply (3).
  20075. * sleep();
  20076. * }
  20077. * }
  20078. * }
  20079. * }
  20080. */
  20081. maxdepth : false,
  20082. /**
  20083. * This option lets you set the max number of formal parameters allowed per
  20084. * function:
  20085. *
  20086. * // jshint maxparams:3
  20087. *
  20088. * function login(request, onSuccess) {
  20089. * // ...
  20090. * }
  20091. *
  20092. * // JSHint: Too many parameters per function (4).
  20093. * function logout(request, isManual, whereAmI, onSuccess) {
  20094. * // ...
  20095. * }
  20096. */
  20097. maxparams : false,
  20098. /**
  20099. * This option lets you control cyclomatic complexity throughout your code.
  20100. * Cyclomatic complexity measures the number of linearly independent paths
  20101. * through a program's source code. Read more about [cyclomatic complexity on
  20102. * Wikipedia](http://en.wikipedia.org/wiki/Cyclomatic_complexity).
  20103. */
  20104. maxcomplexity: false,
  20105. /**
  20106. * This option suppresses warnings about variable shadowing i.e. declaring a
  20107. * variable that had been already declared somewhere in the outer scope.
  20108. *
  20109. * - "inner" - check for variables defined in the same scope only
  20110. * - "outer" - check for variables defined in outer scopes as well
  20111. * - false - same as inner
  20112. * - true - allow variable shadowing
  20113. */
  20114. shadow : false,
  20115. /**
  20116. * This option requires the code to run in ECMAScript 5's strict mode.
  20117. * [Strict mode](https://developer.mozilla.org/en/JavaScript/Strict_mode)
  20118. * is a way to opt in to a restricted variant of JavaScript. Strict mode
  20119. * eliminates some JavaScript pitfalls that didn't cause errors by changing
  20120. * them to produce errors. It also fixes mistakes that made it difficult
  20121. * for the JavaScript engines to perform certain optimizations.
  20122. *
  20123. * - "global" - there must be a `"use strict";` directive at global level
  20124. * - "implied" - lint the code as if there is the `"use strict";` directive
  20125. * - false - disable warnings about strict mode
  20126. * - true - there must be a `"use strict";` directive at function level;
  20127. * this is preferable for scripts intended to be loaded in web
  20128. * browsers directly because enabling strict mode globally
  20129. * could adversely effect other scripts running on the same
  20130. * page
  20131. */
  20132. strict : true,
  20133. /**
  20134. * This option warns when you define and never use your variables. It is very
  20135. * useful for general code cleanup, especially when used in addition to
  20136. * `undef`.
  20137. *
  20138. * // jshint unused:true
  20139. *
  20140. * function test(a, b) {
  20141. * var c, d = 2;
  20142. *
  20143. * return a + d;
  20144. * }
  20145. *
  20146. * test(1, 2);
  20147. *
  20148. * // Line 3: 'b' was defined but never used.
  20149. * // Line 4: 'c' was defined but never used.
  20150. *
  20151. * In addition to that, this option will warn you about unused global
  20152. * variables declared via the `global` directive.
  20153. *
  20154. * When set to `true`, unused parameters that are followed by a used
  20155. * parameter will not produce warnings. This option can be set to `vars` to
  20156. * only check for variables, not function parameters, or `strict` to check
  20157. * all variables and parameters.
  20158. */
  20159. unused : true,
  20160. /**
  20161. * This option prohibits the use of a variable before it was defined.
  20162. * JavaScript has function scope only and, in addition to that, all variables
  20163. * are always moved—or hoisted— to the top of the function. This behavior can
  20164. * lead to some very nasty bugs and that's why it is safer to always use
  20165. * variable only after they have been explicitly defined.
  20166. *
  20167. * Setting this option to "nofunc" will allow function declarations to be
  20168. * ignored.
  20169. *
  20170. * For more in-depth understanding of scoping and hoisting in JavaScript,
  20171. * read [JavaScript Scoping and
  20172. * Hoisting](http://www.adequatelygood.com/2010/2/JavaScript-Scoping-and-Hoisting)
  20173. * by Ben Cherry.
  20174. */
  20175. latedef : false,
  20176. ignore : false, // start/end ignoring lines of code, bypassing the lexer
  20177. // start - start ignoring lines, including the current line
  20178. // end - stop ignoring lines, starting on the next line
  20179. // line - ignore warnings / errors for just a single line
  20180. // (this option does not bypass the lexer)
  20181. ignoreDelimiters: false, // array of start/end delimiters used to ignore
  20182. // certain chunks from code
  20183. /**
  20184. * This option is used to specify the ECMAScript version to which the code
  20185. * must adhere. It can assume one of the following values:
  20186. * - `3` - If you need your program to be executable
  20187. * in older browsers—such as Internet Explorer 6/7/8/9—and other legacy
  20188. * JavaScript environments
  20189. * - `5` - To enable syntax first defined in [the ECMAScript 5.1
  20190. * specification](http://www.ecma-international.org/ecma-262/5.1/index.html).
  20191. * This includes allowing reserved keywords as object properties.
  20192. * - `6` - To tell JSHint that your code uses [ECMAScript
  20193. * 6](http://www.ecma-international.org/ecma-262/6.0/index.html) specific
  20194. * syntax. Note that not all browsers implement them.
  20195. */
  20196. esversion: 5
  20197. };
  20198. // These are JSHint boolean options which are shared with JSLint
  20199. // where the definition in JSHint is opposite JSLint
  20200. exports.inverted = {
  20201. bitwise : true,
  20202. forin : true,
  20203. newcap : true,
  20204. plusplus: true,
  20205. regexp : true,
  20206. undef : true,
  20207. // Inverted and renamed, use JSHint name here
  20208. eqeqeq : true,
  20209. strict : true
  20210. };
  20211. exports.validNames = Object.keys(exports.val)
  20212. .concat(Object.keys(exports.bool.relaxing))
  20213. .concat(Object.keys(exports.bool.enforcing))
  20214. .concat(Object.keys(exports.bool.obsolete))
  20215. .concat(Object.keys(exports.bool.environments));
  20216. // These are JSHint boolean options which are shared with JSLint
  20217. // where the name has been changed but the effect is unchanged
  20218. exports.renamed = {
  20219. eqeq : "eqeqeq",
  20220. windows: "wsh",
  20221. sloppy : "strict"
  20222. };
  20223. exports.removed = {
  20224. nomen: true,
  20225. onevar: true,
  20226. passfail: true,
  20227. white: true,
  20228. gcl: true,
  20229. smarttabs: true,
  20230. trailing: true
  20231. };
  20232. // Add options here which should not be automatically enforced by
  20233. // `enforceall`.
  20234. exports.noenforceall = {
  20235. varstmt: true,
  20236. strict: true
  20237. };
  20238. },{}],18:[function(require,module,exports){
  20239. /*
  20240. * Regular expressions. Some of these are stupidly long.
  20241. */
  20242. /*jshint maxlen:1000 */
  20243. "use strict";
  20244. // Unsafe comment or string (ax)
  20245. exports.unsafeString =
  20246. /@cc|<\/?|script|\]\s*\]|<\s*!|&lt/i;
  20247. // Characters in strings that need escaping (nx and nxg)
  20248. exports.needEsc =
  20249. /[\u0000-\u001f&<"\/\\\u007f-\u009f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/;
  20250. exports.needEscGlobal =
  20251. /[\u0000-\u001f&<"\/\\\u007f-\u009f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g;
  20252. // Star slash (lx)
  20253. exports.starSlash = /\*\//;
  20254. // Identifier (ix)
  20255. exports.identifier = /^([a-zA-Z_$][a-zA-Z0-9_$]*)$/;
  20256. // JavaScript URL (jx)
  20257. exports.javascriptURL = /^(?:javascript|jscript|ecmascript|vbscript|livescript)\s*:/i;
  20258. // Catches /* falls through */ comments (ft)
  20259. exports.fallsThrough = /^\s*falls?\sthrough\s*$/;
  20260. // very conservative rule (eg: only one space between the start of the comment and the first character)
  20261. // to relax the maxlen option
  20262. exports.maxlenException = /^(?:(?:\/\/|\/\*|\*) ?)?[^ ]+$/;
  20263. // Node.js releases prior to version 8 include a version of the V8 engine which
  20264. // incorrectly interprets the character class escape `\s`. The following
  20265. // regular expression may be replaced with `/\s/` when JSHint removes support
  20266. // for Node.js versions prior to 8.
  20267. // Source:
  20268. // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp
  20269. exports.whitespace = /[ \f\n\r\t\v\u00a0\u1680\u2000-\u200a\u2028\u2029\u202f\u205f\u3000\ufeff]/;
  20270. },{}],19:[function(require,module,exports){
  20271. "use strict";
  20272. var _ = require("lodash");
  20273. var events = require("events");
  20274. // Used to denote membership in lookup tables (a primitive value such as `true`
  20275. // would be silently rejected for the property name "__proto__" in some
  20276. // environments)
  20277. var marker = {};
  20278. /**
  20279. * Creates a scope manager that handles variables and labels, storing usages
  20280. * and resolving when variables are used and undefined
  20281. */
  20282. var scopeManager = function(state, predefined, exported, declared) {
  20283. var _current;
  20284. var _scopeStack = [];
  20285. function _newScope(type) {
  20286. _current = {
  20287. "(labels)": Object.create(null),
  20288. "(usages)": Object.create(null),
  20289. "(breakLabels)": Object.create(null),
  20290. "(parent)": _current,
  20291. "(type)": type,
  20292. "(params)": (type === "functionparams" || type === "catchparams") ? [] : null
  20293. };
  20294. _scopeStack.push(_current);
  20295. }
  20296. _newScope("global");
  20297. _current["(predefined)"] = predefined;
  20298. var _currentFunctBody = _current; // this is the block after the params = function
  20299. var usedPredefinedAndGlobals = Object.create(null);
  20300. var impliedGlobals = Object.create(null);
  20301. var unuseds = [];
  20302. var emitter = new events.EventEmitter();
  20303. function warning(code, token) {
  20304. emitter.emit("warning", {
  20305. code: code,
  20306. token: token,
  20307. data: _.slice(arguments, 2)
  20308. });
  20309. }
  20310. function error(code, token) {
  20311. emitter.emit("warning", {
  20312. code: code,
  20313. token: token,
  20314. data: _.slice(arguments, 2)
  20315. });
  20316. }
  20317. function _setupUsages(labelName) {
  20318. if (!_current["(usages)"][labelName]) {
  20319. _current["(usages)"][labelName] = {
  20320. "(modified)": [],
  20321. "(reassigned)": [],
  20322. "(tokens)": []
  20323. };
  20324. }
  20325. }
  20326. var _getUnusedOption = function(unused_opt) {
  20327. if (unused_opt === undefined) {
  20328. unused_opt = state.option.unused;
  20329. }
  20330. if (unused_opt === true) {
  20331. unused_opt = "last-param";
  20332. }
  20333. return unused_opt;
  20334. };
  20335. var _warnUnused = function(name, tkn, type, unused_opt) {
  20336. var line = tkn.line;
  20337. var chr = tkn.from;
  20338. var raw_name = tkn.raw_text || name;
  20339. unused_opt = _getUnusedOption(unused_opt);
  20340. var warnable_types = {
  20341. "vars": ["var"],
  20342. "last-param": ["var", "param"],
  20343. "strict": ["var", "param", "last-param"]
  20344. };
  20345. if (unused_opt) {
  20346. if (warnable_types[unused_opt] && warnable_types[unused_opt].indexOf(type) !== -1) {
  20347. warning("W098", { line: line, from: chr }, raw_name);
  20348. }
  20349. }
  20350. // inconsistent - see gh-1894
  20351. if (unused_opt || type === "var") {
  20352. unuseds.push({
  20353. name: name,
  20354. line: line,
  20355. character: chr
  20356. });
  20357. }
  20358. };
  20359. /**
  20360. * Checks the current scope for unused identifiers
  20361. */
  20362. function _checkForUnused() {
  20363. // function params are handled specially
  20364. // assume that parameters are the only thing declared in the param scope
  20365. if (_current["(type)"] === "functionparams") {
  20366. _checkParams();
  20367. return;
  20368. }
  20369. var curentLabels = _current["(labels)"];
  20370. for (var labelName in curentLabels) {
  20371. if (curentLabels[labelName]["(type)"] !== "exception" &&
  20372. curentLabels[labelName]["(unused)"]) {
  20373. _warnUnused(labelName, curentLabels[labelName]["(token)"], "var");
  20374. }
  20375. }
  20376. }
  20377. /**
  20378. * Checks the current scope for unused parameters
  20379. * Must be called in a function parameter scope
  20380. */
  20381. function _checkParams() {
  20382. var params = _current["(params)"];
  20383. if (!params) {
  20384. return;
  20385. }
  20386. var param = params.pop();
  20387. var unused_opt;
  20388. while (param) {
  20389. var label = _current["(labels)"][param];
  20390. unused_opt = _getUnusedOption(state.funct["(unusedOption)"]);
  20391. // 'undefined' is a special case for (function(window, undefined) { ... })();
  20392. // patterns.
  20393. if (param === "undefined")
  20394. return;
  20395. if (label["(unused)"]) {
  20396. _warnUnused(param, label["(token)"], "param", state.funct["(unusedOption)"]);
  20397. } else if (unused_opt === "last-param") {
  20398. return;
  20399. }
  20400. param = params.pop();
  20401. }
  20402. }
  20403. /**
  20404. * Finds the relevant label's scope, searching from nearest outwards
  20405. * @returns {Object} the scope the label was found in
  20406. */
  20407. function _getLabel(labelName) {
  20408. for (var i = _scopeStack.length - 1 ; i >= 0; --i) {
  20409. var scopeLabels = _scopeStack[i]["(labels)"];
  20410. if (scopeLabels[labelName]) {
  20411. return scopeLabels;
  20412. }
  20413. }
  20414. }
  20415. function usedSoFarInCurrentFunction(labelName) {
  20416. // used so far in this whole function and any sub functions
  20417. for (var i = _scopeStack.length - 1; i >= 0; i--) {
  20418. var current = _scopeStack[i];
  20419. if (current["(usages)"][labelName]) {
  20420. return current["(usages)"][labelName];
  20421. }
  20422. if (current === _currentFunctBody) {
  20423. break;
  20424. }
  20425. }
  20426. return false;
  20427. }
  20428. function _checkOuterShadow(labelName, token) {
  20429. // only check if shadow is outer
  20430. if (state.option.shadow !== "outer") {
  20431. return;
  20432. }
  20433. var isGlobal = _currentFunctBody["(type)"] === "global",
  20434. isNewFunction = _current["(type)"] === "functionparams";
  20435. var outsideCurrentFunction = !isGlobal;
  20436. for (var i = 0; i < _scopeStack.length; i++) {
  20437. var stackItem = _scopeStack[i];
  20438. if (!isNewFunction && _scopeStack[i + 1] === _currentFunctBody) {
  20439. outsideCurrentFunction = false;
  20440. }
  20441. if (outsideCurrentFunction && stackItem["(labels)"][labelName]) {
  20442. warning("W123", token, labelName);
  20443. }
  20444. if (stackItem["(breakLabels)"][labelName]) {
  20445. warning("W123", token, labelName);
  20446. }
  20447. }
  20448. }
  20449. function _latedefWarning(type, labelName, token) {
  20450. var isFunction;
  20451. if (state.option.latedef) {
  20452. isFunction = type === "function" || type === "generator function";
  20453. // if either latedef is strict and this is a function
  20454. // or this is not a function
  20455. if ((state.option.latedef === true && isFunction) || !isFunction) {
  20456. warning("W003", token, labelName);
  20457. }
  20458. }
  20459. }
  20460. var scopeManagerInst = {
  20461. on: function(names, listener) {
  20462. names.split(" ").forEach(function(name) {
  20463. emitter.on(name, listener);
  20464. });
  20465. },
  20466. isPredefined: function(labelName) {
  20467. return !this.has(labelName) && _.has(_scopeStack[0]["(predefined)"], labelName);
  20468. },
  20469. /**
  20470. * Tell the manager we are entering a new block of code
  20471. * @param {string} [type] - The type of the block. Valid values are
  20472. * "functionparams", "catchparams" and
  20473. * "functionouter"
  20474. */
  20475. stack: function(type) {
  20476. var previousScope = _current;
  20477. _newScope(type);
  20478. if (!type && previousScope["(type)"] === "functionparams") {
  20479. _current["(isFuncBody)"] = true;
  20480. _currentFunctBody = _current;
  20481. }
  20482. },
  20483. unstack: function() {
  20484. // jshint proto: true
  20485. var subScope = _scopeStack.length > 1 ? _scopeStack[_scopeStack.length - 2] : null;
  20486. var isUnstackingFunctionBody = _current === _currentFunctBody,
  20487. isUnstackingFunctionParams = _current["(type)"] === "functionparams",
  20488. isUnstackingFunctionOuter = _current["(type)"] === "functionouter";
  20489. var i, j, isImmutable;
  20490. var currentUsages = _current["(usages)"];
  20491. var currentLabels = _current["(labels)"];
  20492. var usedLabelNameList = Object.keys(currentUsages);
  20493. /* istanbul ignore if */
  20494. if (currentUsages.__proto__ && usedLabelNameList.indexOf("__proto__") === -1) {
  20495. usedLabelNameList.push("__proto__");
  20496. }
  20497. for (i = 0; i < usedLabelNameList.length; i++) {
  20498. var usedLabelName = usedLabelNameList[i];
  20499. var usage = currentUsages[usedLabelName];
  20500. var usedLabel = currentLabels[usedLabelName];
  20501. if (usedLabel) {
  20502. var usedLabelType = usedLabel["(type)"];
  20503. isImmutable = usedLabelType === "const" || usedLabelType === "import";
  20504. if (usedLabel["(useOutsideOfScope)"] && !state.option.funcscope) {
  20505. var usedTokens = usage["(tokens)"];
  20506. for (j = 0; j < usedTokens.length; j++) {
  20507. // Keep the consistency of https://github.com/jshint/jshint/issues/2409
  20508. if (usedLabel["(function)"] === usedTokens[j]["(function)"]) {
  20509. error("W038", usedTokens[j], usedLabelName);
  20510. }
  20511. }
  20512. }
  20513. // mark the label used
  20514. _current["(labels)"][usedLabelName]["(unused)"] = false;
  20515. // check for modifying a const
  20516. if (isImmutable && usage["(modified)"]) {
  20517. for (j = 0; j < usage["(modified)"].length; j++) {
  20518. error("E013", usage["(modified)"][j], usedLabelName);
  20519. }
  20520. }
  20521. // check for re-assigning a function declaration
  20522. if ((usedLabelType === "function" || usedLabelType === "generator function" ||
  20523. usedLabelType === "class") && usage["(reassigned)"]) {
  20524. for (j = 0; j < usage["(reassigned)"].length; j++) {
  20525. if (!usage["(reassigned)"][j].ignoreW021) {
  20526. warning("W021", usage["(reassigned)"][j], usedLabelName, usedLabelType);
  20527. }
  20528. }
  20529. }
  20530. continue;
  20531. }
  20532. if (subScope) {
  20533. var labelType = this.labeltype(usedLabelName);
  20534. isImmutable = labelType === "const" ||
  20535. (labelType === null && _scopeStack[0]["(predefined)"][usedLabelName] === false);
  20536. if (isUnstackingFunctionOuter && !isImmutable) {
  20537. if (!state.funct["(outerMutables)"]) {
  20538. state.funct["(outerMutables)"] = [];
  20539. }
  20540. state.funct["(outerMutables)"].push(usedLabelName);
  20541. }
  20542. // not exiting the global scope, so copy the usage down in case its an out of scope usage
  20543. if (!subScope["(usages)"][usedLabelName]) {
  20544. subScope["(usages)"][usedLabelName] = usage;
  20545. if (isUnstackingFunctionBody) {
  20546. subScope["(usages)"][usedLabelName]["(onlyUsedSubFunction)"] = true;
  20547. }
  20548. } else {
  20549. var subScopeUsage = subScope["(usages)"][usedLabelName];
  20550. subScopeUsage["(modified)"] = subScopeUsage["(modified)"].concat(usage["(modified)"]);
  20551. subScopeUsage["(tokens)"] = subScopeUsage["(tokens)"].concat(usage["(tokens)"]);
  20552. subScopeUsage["(reassigned)"] =
  20553. subScopeUsage["(reassigned)"].concat(usage["(reassigned)"]);
  20554. }
  20555. } else {
  20556. // this is exiting global scope, so we finalise everything here - we are at the end of the file
  20557. if (typeof _current["(predefined)"][usedLabelName] === "boolean") {
  20558. // remove the declared token, so we know it is used
  20559. delete declared[usedLabelName];
  20560. // note it as used so it can be reported
  20561. usedPredefinedAndGlobals[usedLabelName] = marker;
  20562. // check for re-assigning a read-only (set to false) predefined
  20563. if (_current["(predefined)"][usedLabelName] === false && usage["(reassigned)"]) {
  20564. for (j = 0; j < usage["(reassigned)"].length; j++) {
  20565. if (!usage["(reassigned)"][j].ignoreW020) {
  20566. warning("W020", usage["(reassigned)"][j]);
  20567. }
  20568. }
  20569. }
  20570. }
  20571. else {
  20572. // label usage is not predefined and we have not found a declaration
  20573. // so report as undeclared
  20574. for (j = 0; j < usage["(tokens)"].length; j++) {
  20575. var undefinedToken = usage["(tokens)"][j];
  20576. // if its not a forgiven undefined (e.g. typof x)
  20577. if (!undefinedToken.forgiveUndef) {
  20578. // if undef is on and undef was on when the token was defined
  20579. if (state.option.undef && !undefinedToken.ignoreUndef) {
  20580. warning("W117", undefinedToken, usedLabelName);
  20581. }
  20582. if (impliedGlobals[usedLabelName]) {
  20583. impliedGlobals[usedLabelName].line.push(undefinedToken.line);
  20584. } else {
  20585. impliedGlobals[usedLabelName] = {
  20586. name: usedLabelName,
  20587. line: [undefinedToken.line]
  20588. };
  20589. }
  20590. }
  20591. }
  20592. }
  20593. }
  20594. }
  20595. // if exiting the global scope, we can warn about declared globals that haven't been used yet
  20596. if (!subScope) {
  20597. Object.keys(declared)
  20598. .forEach(function(labelNotUsed) {
  20599. _warnUnused(labelNotUsed, declared[labelNotUsed], "var");
  20600. });
  20601. }
  20602. // If this is not a function boundary, transfer function-scoped labels to
  20603. // the parent block (a rough simulation of variable hoisting). Previously
  20604. // existing labels in the parent block should take precedence so that things and stuff.
  20605. if (subScope && !isUnstackingFunctionBody &&
  20606. !isUnstackingFunctionParams && !isUnstackingFunctionOuter) {
  20607. var labelNames = Object.keys(currentLabels);
  20608. for (i = 0; i < labelNames.length; i++) {
  20609. var defLabelName = labelNames[i];
  20610. var defLabel = currentLabels[defLabelName];
  20611. if (!defLabel["(blockscoped)"] && defLabel["(type)"] !== "exception") {
  20612. var shadowed = subScope["(labels)"][defLabelName];
  20613. // Do not overwrite a label if it exists in the parent scope
  20614. // because it is shared by adjacent blocks. Copy the `unused`
  20615. // property so that any references found within the current block
  20616. // are counted toward that higher-level declaration.
  20617. if (shadowed) {
  20618. shadowed["(unused)"] &= defLabel["(unused)"];
  20619. // "Hoist" the variable to the parent block, decorating the label
  20620. // so that future references, though technically valid, can be
  20621. // reported as "out-of-scope" in the absence of the `funcscope`
  20622. // option.
  20623. } else {
  20624. defLabel["(useOutsideOfScope)"] =
  20625. // Do not warn about out-of-scope usages in the global scope
  20626. _currentFunctBody["(type)"] !== "global" &&
  20627. // When a higher scope contains a binding for the label, the
  20628. // label is a re-declaration and should not prompt "used
  20629. // out-of-scope" warnings.
  20630. !this.funct.has(defLabelName, { excludeCurrent: true });
  20631. subScope["(labels)"][defLabelName] = defLabel;
  20632. }
  20633. delete currentLabels[defLabelName];
  20634. }
  20635. }
  20636. }
  20637. _checkForUnused();
  20638. _scopeStack.pop();
  20639. if (isUnstackingFunctionBody) {
  20640. _currentFunctBody = _scopeStack[_.findLastIndex(_scopeStack, function(scope) {
  20641. // if function or if global (which is at the bottom so it will only return true if we call back)
  20642. return scope["(isFuncBody)"] || scope["(type)"] === "global";
  20643. })];
  20644. }
  20645. _current = subScope;
  20646. },
  20647. /**
  20648. * Add a param to the current scope
  20649. * @param {string} labelName
  20650. * @param {Token} token
  20651. * @param {string} [type="param"] param type
  20652. */
  20653. addParam: function(labelName, token, type) {
  20654. type = type || "param";
  20655. if (type === "exception") {
  20656. // if defined in the current function
  20657. var previouslyDefinedLabelType = this.funct.labeltype(labelName);
  20658. if (previouslyDefinedLabelType && previouslyDefinedLabelType !== "exception") {
  20659. // and has not been used yet in the current function scope
  20660. if (!state.option.node) {
  20661. warning("W002", state.tokens.next, labelName);
  20662. }
  20663. }
  20664. if (state.isStrict() && (labelName === "arguments" || labelName === "eval")) {
  20665. warning("E008", token);
  20666. }
  20667. }
  20668. // The variable was declared in the current scope
  20669. if (_.has(_current["(labels)"], labelName)) {
  20670. _current["(labels)"][labelName].duplicated = true;
  20671. // The variable was declared in an outer scope
  20672. } else {
  20673. // if this scope has the variable defined, it's a re-definition error
  20674. _checkOuterShadow(labelName, token);
  20675. _current["(labels)"][labelName] = {
  20676. "(type)" : type,
  20677. "(token)": token,
  20678. "(unused)": true };
  20679. _current["(params)"].push(labelName);
  20680. }
  20681. if (_.has(_current["(usages)"], labelName)) {
  20682. var usage = _current["(usages)"][labelName];
  20683. // if its in a sub function it is not necessarily an error, just latedef
  20684. if (usage["(onlyUsedSubFunction)"]) {
  20685. _latedefWarning(type, labelName, token);
  20686. } else {
  20687. // this is a clear illegal usage for block scoped variables
  20688. warning("E056", token, labelName, type);
  20689. }
  20690. }
  20691. },
  20692. validateParams: function(isArrow) {
  20693. var isStrict = state.isStrict();
  20694. var currentFunctParamScope = _currentFunctBody["(parent)"];
  20695. if (!currentFunctParamScope["(params)"]) {
  20696. return;
  20697. }
  20698. currentFunctParamScope["(params)"].forEach(function(labelName) {
  20699. var label = currentFunctParamScope["(labels)"][labelName];
  20700. if (label.duplicated) {
  20701. if (isStrict || isArrow) {
  20702. warning("E011", label["(token)"], labelName);
  20703. } else if (state.option.shadow !== true) {
  20704. warning("W004", label["(token)"], labelName);
  20705. }
  20706. }
  20707. if (isStrict && (labelName === "arguments" || labelName === "eval")) {
  20708. warning("E008", label["(token)"]);
  20709. }
  20710. });
  20711. },
  20712. getUsedOrDefinedGlobals: function() {
  20713. // jshint proto: true
  20714. var list = Object.keys(usedPredefinedAndGlobals);
  20715. // If `__proto__` is used as a global variable name, its entry in the
  20716. // lookup table may not be enumerated by `Object.keys` (depending on the
  20717. // environment).
  20718. /* istanbul ignore if */
  20719. if (usedPredefinedAndGlobals.__proto__ === marker &&
  20720. list.indexOf("__proto__") === -1) {
  20721. list.push("__proto__");
  20722. }
  20723. return list;
  20724. },
  20725. /**
  20726. * Gets an array of implied globals
  20727. * @returns {Array.<{ name: string, line: Array.<number>}>}
  20728. */
  20729. getImpliedGlobals: function() {
  20730. // jshint proto: true
  20731. var values = _.values(impliedGlobals);
  20732. var hasProto = false;
  20733. // If `__proto__` is an implied global variable, its entry in the lookup
  20734. // table may not be enumerated by `_.values` (depending on the
  20735. // environment).
  20736. if (impliedGlobals.__proto__) {
  20737. hasProto = values.some(function(value) {
  20738. return value.name === "__proto__";
  20739. });
  20740. /* istanbul ignore if */
  20741. if (!hasProto) {
  20742. values.push(impliedGlobals.__proto__);
  20743. }
  20744. }
  20745. return values;
  20746. },
  20747. /**
  20748. * Returns a list of unused variables
  20749. * @returns {Array}
  20750. */
  20751. getUnuseds: function() {
  20752. return unuseds;
  20753. },
  20754. has: function(labelName) {
  20755. return Boolean(_getLabel(labelName));
  20756. },
  20757. labeltype: function(labelName) {
  20758. // returns a labels type or null if not present
  20759. var scopeLabels = _getLabel(labelName);
  20760. if (scopeLabels) {
  20761. return scopeLabels[labelName]["(type)"];
  20762. }
  20763. return null;
  20764. },
  20765. /**
  20766. * for the exported options, indicating a variable is used outside the file
  20767. */
  20768. addExported: function(labelName) {
  20769. var globalLabels = _scopeStack[0]["(labels)"];
  20770. if (_.has(declared, labelName)) {
  20771. // remove the declared token, so we know it is used
  20772. delete declared[labelName];
  20773. } else if (_.has(globalLabels, labelName)) {
  20774. globalLabels[labelName]["(unused)"] = false;
  20775. } else {
  20776. for (var i = 1; i < _scopeStack.length; i++) {
  20777. var scope = _scopeStack[i];
  20778. // if `scope.(type)` is not defined, it is a block scope
  20779. if (!scope["(type)"]) {
  20780. if (_.has(scope["(labels)"], labelName) &&
  20781. !scope["(labels)"][labelName]["(blockscoped)"]) {
  20782. scope["(labels)"][labelName]["(unused)"] = false;
  20783. return;
  20784. }
  20785. } else {
  20786. break;
  20787. }
  20788. }
  20789. exported[labelName] = true;
  20790. }
  20791. },
  20792. /**
  20793. * Mark an indentifier as es6 module exported
  20794. */
  20795. setExported: function(labelName, token) {
  20796. this.block.use(labelName, token);
  20797. },
  20798. initialize: function(labelName) {
  20799. if (_current["(labels)"][labelName]) {
  20800. _current["(labels)"][labelName]["(initialized)"] = true;
  20801. }
  20802. },
  20803. /**
  20804. * adds an indentifier to the relevant current scope and creates warnings/errors as necessary
  20805. * @param {string} labelName
  20806. * @param {Object} opts
  20807. * @param {String} opts.type - the type of the label e.g. "param", "var", "let, "const", "import", "function", "generator function"
  20808. * @param {Token} opts.token - the token pointing at the declaration
  20809. * @param {boolean} opts.initialized - whether the binding should be created in an "initialized" state.
  20810. */
  20811. addlabel: function(labelName, opts) {
  20812. var type = opts.type;
  20813. var token = opts.token;
  20814. var isblockscoped = type === "let" || type === "const" ||
  20815. type === "class" || type === "import" || type === "generator function";
  20816. var ishoisted = type === "function" || type === "generator function" ||
  20817. type === "import";
  20818. var isexported = (isblockscoped ? _current : _currentFunctBody)["(type)"] === "global" &&
  20819. _.has(exported, labelName);
  20820. // outer shadow check (inner is only on non-block scoped)
  20821. _checkOuterShadow(labelName, token);
  20822. if (state.isStrict() && (labelName === "arguments" || labelName === "eval")) {
  20823. warning("E008", token);
  20824. }
  20825. if (isblockscoped) {
  20826. var declaredInCurrentScope = _current["(labels)"][labelName];
  20827. // for block scoped variables, params are seen in the current scope as the root function
  20828. // scope, so check these too.
  20829. if (!declaredInCurrentScope && _current === _currentFunctBody &&
  20830. _current["(type)"] !== "global") {
  20831. declaredInCurrentScope = !!_currentFunctBody["(parent)"]["(labels)"][labelName];
  20832. }
  20833. // if its not already defined (which is an error, so ignore) and is used in TDZ
  20834. if (!declaredInCurrentScope && _current["(usages)"][labelName]) {
  20835. var usage = _current["(usages)"][labelName];
  20836. // if its in a sub function it is not necessarily an error, just latedef
  20837. if (usage["(onlyUsedSubFunction)"] || ishoisted) {
  20838. _latedefWarning(type, labelName, token);
  20839. } else if (!ishoisted) {
  20840. // this is a clear illegal usage for block scoped variables
  20841. warning("E056", token, labelName, type);
  20842. }
  20843. }
  20844. // If this scope has already declared a binding with the same name,
  20845. // then this represents a redeclaration error if:
  20846. //
  20847. // 1. it is a "hoisted" block-scoped binding within a block. For
  20848. // instance: generator functions may be redeclared in the global
  20849. // scope but not within block statements
  20850. // 2. this is not a "hoisted" block-scoped binding
  20851. if (declaredInCurrentScope &&
  20852. (!ishoisted || (_current["(type)"] !== "global" || type === "import"))) {
  20853. warning("E011", token, labelName);
  20854. }
  20855. else if (state.option.shadow === "outer") {
  20856. // if shadow is outer, for block scope we want to detect any shadowing within this function
  20857. if (scopeManagerInst.funct.has(labelName)) {
  20858. warning("W004", token, labelName);
  20859. }
  20860. }
  20861. scopeManagerInst.block.add(
  20862. labelName, type, token, !isexported, opts.initialized
  20863. );
  20864. } else {
  20865. var declaredInCurrentFunctionScope = scopeManagerInst.funct.has(labelName);
  20866. // check for late definition, ignore if already declared
  20867. if (!declaredInCurrentFunctionScope && usedSoFarInCurrentFunction(labelName)) {
  20868. _latedefWarning(type, labelName, token);
  20869. }
  20870. // defining with a var or a function when a block scope variable of the same name
  20871. // is in scope is an error
  20872. if (scopeManagerInst.funct.has(labelName, { onlyBlockscoped: true })) {
  20873. warning("E011", token, labelName);
  20874. } else if (state.option.shadow !== true) {
  20875. // now since we didn't get any block scope variables, test for var/function
  20876. // shadowing
  20877. if (declaredInCurrentFunctionScope && labelName !== "__proto__") {
  20878. // see https://github.com/jshint/jshint/issues/2400
  20879. if (_currentFunctBody["(type)"] !== "global") {
  20880. warning("W004", token, labelName);
  20881. }
  20882. }
  20883. }
  20884. scopeManagerInst.funct.add(labelName, type, token, !isexported);
  20885. if (_currentFunctBody["(type)"] === "global" && !state.impliedClosure()) {
  20886. usedPredefinedAndGlobals[labelName] = marker;
  20887. }
  20888. }
  20889. },
  20890. funct: {
  20891. /**
  20892. * Returns the label type given certain options
  20893. * @param labelName
  20894. * @param {Object=} options
  20895. * @param {Boolean=} options.onlyBlockscoped - only include block scoped labels
  20896. * @param {Boolean=} options.excludeParams - exclude the param scope
  20897. * @param {Boolean=} options.excludeCurrent - exclude the current scope
  20898. * @returns {String}
  20899. */
  20900. labeltype: function(labelName, options) {
  20901. var onlyBlockscoped = options && options.onlyBlockscoped;
  20902. var excludeParams = options && options.excludeParams;
  20903. var currentScopeIndex = _scopeStack.length - (options && options.excludeCurrent ? 2 : 1);
  20904. for (var i = currentScopeIndex; i >= 0; i--) {
  20905. var current = _scopeStack[i];
  20906. if (current["(labels)"][labelName] &&
  20907. (!onlyBlockscoped || current["(labels)"][labelName]["(blockscoped)"])) {
  20908. return current["(labels)"][labelName]["(type)"];
  20909. }
  20910. var scopeCheck = excludeParams ? _scopeStack[ i - 1 ] : current;
  20911. if (scopeCheck && scopeCheck["(type)"] === "functionparams") {
  20912. return null;
  20913. }
  20914. }
  20915. return null;
  20916. },
  20917. /**
  20918. * Returns if a break label exists in the function scope
  20919. * @param {string} labelName
  20920. * @returns {boolean}
  20921. */
  20922. hasBreakLabel: function(labelName) {
  20923. for (var i = _scopeStack.length - 1; i >= 0; i--) {
  20924. var current = _scopeStack[i];
  20925. if (current["(breakLabels)"][labelName]) {
  20926. return true;
  20927. }
  20928. if (current["(type)"] === "functionparams") {
  20929. return false;
  20930. }
  20931. }
  20932. return false;
  20933. },
  20934. /**
  20935. * Returns if the label is in the current function scope
  20936. * See scopeManager.funct.labelType for options
  20937. */
  20938. has: function(labelName, options) {
  20939. return Boolean(this.labeltype(labelName, options));
  20940. },
  20941. /**
  20942. * Adds a new function scoped variable
  20943. * see block.add for block scoped
  20944. */
  20945. add: function(labelName, type, tok, unused) {
  20946. _current["(labels)"][labelName] = {
  20947. "(type)" : type,
  20948. "(token)": tok,
  20949. "(blockscoped)": false,
  20950. "(function)": _currentFunctBody,
  20951. "(unused)": unused };
  20952. }
  20953. },
  20954. block: {
  20955. /**
  20956. * is the current block global?
  20957. * @returns Boolean
  20958. */
  20959. isGlobal: function() {
  20960. return _current["(type)"] === "global";
  20961. },
  20962. use: function(labelName, token) {
  20963. // if resolves to current function params, then do not store usage just resolve
  20964. // this is because function(a) { var a; a = a; } will resolve to the param, not
  20965. // to the unset var
  20966. // first check the param is used
  20967. var paramScope = _currentFunctBody["(parent)"];
  20968. if (paramScope && paramScope["(labels)"][labelName] &&
  20969. paramScope["(labels)"][labelName]["(type)"] === "param") {
  20970. // then check its not declared by a block scope variable
  20971. if (!scopeManagerInst.funct.has(labelName,
  20972. { excludeParams: true, onlyBlockscoped: true })) {
  20973. paramScope["(labels)"][labelName]["(unused)"] = false;
  20974. }
  20975. }
  20976. if (token && (state.ignored.W117 || state.option.undef === false)) {
  20977. token.ignoreUndef = true;
  20978. }
  20979. _setupUsages(labelName);
  20980. _current["(usages)"][labelName]["(onlyUsedSubFunction)"] = false;
  20981. if (token) {
  20982. token["(function)"] = _currentFunctBody;
  20983. _current["(usages)"][labelName]["(tokens)"].push(token);
  20984. }
  20985. // blockscoped vars can't be used within their initializer (TDZ)
  20986. var label = _current["(labels)"][labelName];
  20987. if (label && label["(blockscoped)"] && !label["(initialized)"]) {
  20988. error("E056", token, labelName, label["(type)"]);
  20989. }
  20990. },
  20991. reassign: function(labelName, token) {
  20992. token.ignoreW020 = state.ignored.W020;
  20993. token.ignoreW021 = state.ignored.W021;
  20994. this.modify(labelName, token);
  20995. _current["(usages)"][labelName]["(reassigned)"].push(token);
  20996. },
  20997. modify: function(labelName, token) {
  20998. _setupUsages(labelName);
  20999. _current["(usages)"][labelName]["(onlyUsedSubFunction)"] = false;
  21000. _current["(usages)"][labelName]["(modified)"].push(token);
  21001. },
  21002. /**
  21003. * Adds a new variable
  21004. */
  21005. add: function(labelName, type, tok, unused, initialized) {
  21006. _current["(labels)"][labelName] = {
  21007. "(type)" : type,
  21008. "(token)": tok,
  21009. "(initialized)": !!initialized,
  21010. "(blockscoped)": true,
  21011. "(unused)": unused };
  21012. },
  21013. addBreakLabel: function(labelName, opts) {
  21014. var token = opts.token;
  21015. if (scopeManagerInst.funct.hasBreakLabel(labelName)) {
  21016. warning("E011", token, labelName);
  21017. }
  21018. else if (state.option.shadow === "outer") {
  21019. if (scopeManagerInst.funct.has(labelName)) {
  21020. warning("W004", token, labelName);
  21021. } else {
  21022. _checkOuterShadow(labelName, token);
  21023. }
  21024. }
  21025. _current["(breakLabels)"][labelName] = token;
  21026. }
  21027. }
  21028. };
  21029. return scopeManagerInst;
  21030. };
  21031. module.exports = scopeManager;
  21032. },{"events":6,"lodash":13}],20:[function(require,module,exports){
  21033. "use strict";
  21034. var NameStack = require("./name-stack.js");
  21035. var state = {
  21036. syntax: {},
  21037. /**
  21038. * Determine if the code currently being linted is strict mode code.
  21039. *
  21040. * @returns {boolean}
  21041. */
  21042. isStrict: function() {
  21043. return this.directive["use strict"] || this.inClassBody ||
  21044. this.option.module || this.option.strict === "implied";
  21045. },
  21046. /**
  21047. * Determine if the current state warrants a warning for statements outside
  21048. * of strict mode code.
  21049. *
  21050. * While emitting warnings based on function scope would be more intuitive
  21051. * (and less noisy), JSHint observes statement-based semantics in order to
  21052. * preserve legacy behavior.
  21053. *
  21054. * This method does not take the state of the parser into account, making no
  21055. * distinction between global code and function code. Because the "missing
  21056. * 'use strict'" warning is *also* reported at function boundaries, this
  21057. * function interprets `strict` option values `true` and `undefined` as
  21058. * equivalent.
  21059. */
  21060. stmtMissingStrict: function() {
  21061. if (this.option.strict === "global") {
  21062. return true;
  21063. }
  21064. if (this.option.strict === false) {
  21065. return false;
  21066. }
  21067. if (this.option.globalstrict) {
  21068. return true;
  21069. }
  21070. return false;
  21071. },
  21072. allowsGlobalUsd: function() {
  21073. return this.option.strict === "global" || this.option.globalstrict ||
  21074. this.option.module || this.impliedClosure();
  21075. },
  21076. /**
  21077. * Determine if the current configuration describes an environment that is
  21078. * wrapped in an immediately-invoked function expression prior to evaluation.
  21079. *
  21080. * @returns {boolean}
  21081. */
  21082. impliedClosure: function() {
  21083. return this.option.node || this.option.phantom || this.option.browserify;
  21084. },
  21085. // Assumption: chronologically ES3 < ES5 < ES6 < Moz
  21086. inMoz: function() {
  21087. return this.option.moz;
  21088. },
  21089. /**
  21090. * @param {boolean} strict - When `true`, only consider ES6 when in
  21091. * "esversion: 6" code.
  21092. */
  21093. inES6: function(strict) {
  21094. if (strict) {
  21095. return this.esVersion === 6;
  21096. }
  21097. return this.option.moz || this.esVersion >= 6;
  21098. },
  21099. /**
  21100. * @param {boolean} strict - When `true`, return `true` only when
  21101. * esVersion is exactly 5
  21102. */
  21103. inES5: function(strict) {
  21104. if (strict) {
  21105. return (!this.esVersion || this.esVersion === 5) && !this.option.moz;
  21106. }
  21107. return !this.esVersion || this.esVersion >= 5 || this.option.moz;
  21108. },
  21109. /**
  21110. * Determine the current version of the input language by inspecting the
  21111. * value of all ECMAScript-version-related options. This logic is necessary
  21112. * to ensure compatibility with deprecated options `es3`, `es5`, and
  21113. * `esnext`, and it may be drastically simplified when those options are
  21114. * removed.
  21115. *
  21116. * @returns {string|null} - the name of any incompatible option detected,
  21117. * `null` otherwise
  21118. */
  21119. inferEsVersion: function() {
  21120. var badOpt = null;
  21121. if (this.option.esversion) {
  21122. if (this.option.es3) {
  21123. badOpt = "es3";
  21124. } else if (this.option.es5) {
  21125. badOpt = "es5";
  21126. } else if (this.option.esnext) {
  21127. badOpt = "esnext";
  21128. }
  21129. if (badOpt) {
  21130. return badOpt;
  21131. }
  21132. if (this.option.esversion === 2015) {
  21133. this.esVersion = 6;
  21134. } else {
  21135. this.esVersion = this.option.esversion;
  21136. }
  21137. } else if (this.option.es3) {
  21138. this.esVersion = 3;
  21139. } else if (this.option.esnext) {
  21140. this.esVersion = 6;
  21141. }
  21142. return null;
  21143. },
  21144. reset: function() {
  21145. this.tokens = {
  21146. prev: null,
  21147. next: null,
  21148. curr: null
  21149. };
  21150. this.option = {};
  21151. this.esVersion = 5;
  21152. this.funct = null;
  21153. this.ignored = {};
  21154. this.directive = Object.create(null);
  21155. this.jsonMode = false;
  21156. this.lines = [];
  21157. this.tab = "";
  21158. this.cache = {}; // Node.JS doesn't have Map. Sniff.
  21159. this.ignoredLines = {};
  21160. this.forinifcheckneeded = false;
  21161. this.nameStack = new NameStack();
  21162. this.inClassBody = false;
  21163. }
  21164. };
  21165. exports.state = state;
  21166. },{"./name-stack.js":16}],21:[function(require,module,exports){
  21167. "use strict";
  21168. exports.register = function(linter) {
  21169. // Check for properties named __proto__. This special property was
  21170. // deprecated and then re-introduced for ES6.
  21171. linter.on("Identifier", function style_scanProto(data) {
  21172. if (linter.getOption("proto")) {
  21173. return;
  21174. }
  21175. if (data.name === "__proto__") {
  21176. linter.warn("W103", {
  21177. line: data.line,
  21178. char: data.char,
  21179. data: [ data.name, "6" ]
  21180. });
  21181. }
  21182. });
  21183. // Check for properties named __iterator__. This is a special property
  21184. // available only in browsers with JavaScript 1.7 implementation, but
  21185. // it is deprecated for ES6
  21186. linter.on("Identifier", function style_scanIterator(data) {
  21187. if (linter.getOption("iterator")) {
  21188. return;
  21189. }
  21190. if (data.name === "__iterator__") {
  21191. linter.warn("W103", {
  21192. line: data.line,
  21193. char: data.char,
  21194. data: [ data.name ]
  21195. });
  21196. }
  21197. });
  21198. // Check that all identifiers are using camelCase notation.
  21199. // Exceptions: names like MY_VAR and _myVar.
  21200. linter.on("Identifier", function style_scanCamelCase(data) {
  21201. if (!linter.getOption("camelcase")) {
  21202. return;
  21203. }
  21204. if (data.name.replace(/^_+|_+$/g, "").indexOf("_") > -1 && !data.name.match(/^[A-Z0-9_]*$/)) {
  21205. linter.warn("W106", {
  21206. line: data.line,
  21207. char: data.char,
  21208. data: [ data.name ]
  21209. });
  21210. }
  21211. });
  21212. // Enforce consistency in style of quoting.
  21213. linter.on("String", function style_scanQuotes(data) {
  21214. var quotmark = linter.getOption("quotmark");
  21215. var code;
  21216. if (!quotmark) {
  21217. return;
  21218. }
  21219. // If quotmark is set to 'single' warn about all double-quotes.
  21220. if (quotmark === "single" && data.quote !== "'") {
  21221. code = "W109";
  21222. }
  21223. // If quotmark is set to 'double' warn about all single-quotes.
  21224. if (quotmark === "double" && data.quote !== "\"") {
  21225. code = "W108";
  21226. }
  21227. // If quotmark is set to true, remember the first quotation style
  21228. // and then warn about all others.
  21229. if (quotmark === true) {
  21230. if (!linter.getCache("quotmark")) {
  21231. linter.setCache("quotmark", data.quote);
  21232. }
  21233. if (linter.getCache("quotmark") !== data.quote) {
  21234. code = "W110";
  21235. }
  21236. }
  21237. if (code) {
  21238. linter.warn(code, {
  21239. line: data.line,
  21240. char: data.char,
  21241. });
  21242. }
  21243. });
  21244. linter.on("Number", function style_scanNumbers(data) {
  21245. if (data.value.charAt(0) === ".") {
  21246. // Warn about a leading decimal point.
  21247. linter.warn("W008", {
  21248. line: data.line,
  21249. char: data.char,
  21250. data: [ data.value ]
  21251. });
  21252. }
  21253. if (data.value.substr(data.value.length - 1) === ".") {
  21254. // Warn about a trailing decimal point.
  21255. linter.warn("W047", {
  21256. line: data.line,
  21257. char: data.char,
  21258. data: [ data.value ]
  21259. });
  21260. }
  21261. if (/^00+/.test(data.value)) {
  21262. // Multiple leading zeroes.
  21263. linter.warn("W046", {
  21264. line: data.line,
  21265. char: data.char,
  21266. data: [ data.value ]
  21267. });
  21268. }
  21269. });
  21270. // Warn about script URLs.
  21271. linter.on("String", function style_scanJavaScriptURLs(data) {
  21272. var re = /^(?:javascript|jscript|ecmascript|vbscript|livescript)\s*:/i;
  21273. if (linter.getOption("scripturl")) {
  21274. return;
  21275. }
  21276. if (re.test(data.value)) {
  21277. linter.warn("W107", {
  21278. line: data.line,
  21279. char: data.char
  21280. });
  21281. }
  21282. });
  21283. };
  21284. },{}],22:[function(require,module,exports){
  21285. // jshint -W001
  21286. "use strict";
  21287. // Identifiers provided by the ECMAScript standard.
  21288. exports.reservedVars = {
  21289. NaN : false,
  21290. undefined : false
  21291. };
  21292. exports.ecmaIdentifiers = {
  21293. 3: {
  21294. Array : false,
  21295. Boolean : false,
  21296. Date : false,
  21297. decodeURI : false,
  21298. decodeURIComponent : false,
  21299. encodeURI : false,
  21300. encodeURIComponent : false,
  21301. Error : false,
  21302. "eval" : false,
  21303. EvalError : false,
  21304. Function : false,
  21305. hasOwnProperty : false,
  21306. Infinity : false,
  21307. isFinite : false,
  21308. isNaN : false,
  21309. Math : false,
  21310. Number : false,
  21311. Object : false,
  21312. parseInt : false,
  21313. parseFloat : false,
  21314. RangeError : false,
  21315. ReferenceError : false,
  21316. RegExp : false,
  21317. String : false,
  21318. SyntaxError : false,
  21319. TypeError : false,
  21320. URIError : false
  21321. },
  21322. 5: {
  21323. JSON : false
  21324. },
  21325. 6: {
  21326. ArrayBuffer : false,
  21327. DataView : false,
  21328. Float32Array : false,
  21329. Float64Array : false,
  21330. Int8Array : false,
  21331. Int16Array : false,
  21332. Int32Array : false,
  21333. Map : false,
  21334. Promise : false,
  21335. Proxy : false,
  21336. Reflect : false,
  21337. Set : false,
  21338. Symbol : false,
  21339. Uint8Array : false,
  21340. Uint16Array : false,
  21341. Uint32Array : false,
  21342. Uint8ClampedArray : false,
  21343. WeakMap : false,
  21344. WeakSet : false
  21345. }
  21346. };
  21347. // Global variables commonly provided by a web browser environment.
  21348. exports.browser = {
  21349. Audio : false,
  21350. Blob : false,
  21351. addEventListener : false,
  21352. applicationCache : false,
  21353. atob : false,
  21354. blur : false,
  21355. btoa : false,
  21356. cancelAnimationFrame : false,
  21357. CanvasGradient : false,
  21358. CanvasPattern : false,
  21359. CanvasRenderingContext2D: false,
  21360. CSS : false,
  21361. CSSImportRule : false,
  21362. CSSGroupingRule : false,
  21363. CSSMarginRule : false,
  21364. CSSMediaRule : false,
  21365. CSSNamespaceRule : false,
  21366. CSSPageRule : false,
  21367. CSSRule : false,
  21368. CSSRuleList : false,
  21369. CSSStyleDeclaration : false,
  21370. CSSStyleRule : false,
  21371. CSSStyleSheet : false,
  21372. clearInterval : false,
  21373. clearTimeout : false,
  21374. close : false,
  21375. closed : false,
  21376. Comment : false,
  21377. CompositionEvent : false,
  21378. CustomEvent : false,
  21379. DOMParser : false,
  21380. defaultStatus : false,
  21381. Document : false,
  21382. document : false,
  21383. DocumentFragment : false,
  21384. Element : false,
  21385. ElementTimeControl : false,
  21386. Event : false,
  21387. event : false,
  21388. fetch : false,
  21389. File : false,
  21390. FileList : false,
  21391. FileReader : false,
  21392. FormData : false,
  21393. focus : false,
  21394. frames : false,
  21395. getComputedStyle : false,
  21396. Headers : false,
  21397. HTMLAnchorElement : false,
  21398. HTMLAreaElement : false,
  21399. HTMLAudioElement : false,
  21400. HTMLBaseElement : false,
  21401. HTMLBlockquoteElement: false,
  21402. HTMLBodyElement : false,
  21403. HTMLBRElement : false,
  21404. HTMLButtonElement : false,
  21405. HTMLCanvasElement : false,
  21406. HTMLCollection : false,
  21407. HTMLDataElement : false,
  21408. HTMLDataListElement : false,
  21409. HTMLDetailsElement : false,
  21410. HTMLDialogElement : false,
  21411. HTMLDirectoryElement : false,
  21412. HTMLDivElement : false,
  21413. HTMLDListElement : false,
  21414. HTMLElement : false,
  21415. HTMLEmbedElement : false,
  21416. HTMLFieldSetElement : false,
  21417. HTMLFontElement : false,
  21418. HTMLFormElement : false,
  21419. HTMLFrameElement : false,
  21420. HTMLFrameSetElement : false,
  21421. HTMLHeadElement : false,
  21422. HTMLHeadingElement : false,
  21423. HTMLHRElement : false,
  21424. HTMLHtmlElement : false,
  21425. HTMLIFrameElement : false,
  21426. HTMLImageElement : false,
  21427. HTMLInputElement : false,
  21428. /* HTMLIsIndexElement was removed from the WHATWG HTML spec;
  21429. see https://github.com/whatwg/html/pull/1095.
  21430. HTMLIsIndexElement has been removed from browsers; see:
  21431. • Chromium Removal: https://codereview.chromium.org/96653004/
  21432. • Gecko Removal: https://bugzilla.mozilla.org/show_bug.cgi?id=1266495
  21433. • WebKit Removal: https://bugs.webkit.org/show_bug.cgi?id=7139.
  21434. See also the discussion at https://github.com/jshint/jshint/pull/3222. */
  21435. HTMLIsIndexElement : false,
  21436. HTMLLabelElement : false,
  21437. HTMLLayerElement : false,
  21438. HTMLLegendElement : false,
  21439. HTMLLIElement : false,
  21440. HTMLLinkElement : false,
  21441. HTMLMapElement : false,
  21442. HTMLMarqueeElement : false,
  21443. HTMLMediaElement : false,
  21444. HTMLMenuElement : false,
  21445. HTMLMetaElement : false,
  21446. HTMLMeterElement : false,
  21447. HTMLModElement : false,
  21448. HTMLObjectElement : false,
  21449. HTMLOListElement : false,
  21450. HTMLOptGroupElement : false,
  21451. HTMLOptionElement : false,
  21452. HTMLParagraphElement : false,
  21453. HTMLParamElement : false,
  21454. HTMLPictureElement : false,
  21455. HTMLPreElement : false,
  21456. HTMLProgressElement : false,
  21457. HTMLQuoteElement : false,
  21458. HTMLScriptElement : false,
  21459. HTMLSelectElement : false,
  21460. HTMLSlotElement : false,
  21461. HTMLSourceElement : false,
  21462. HTMLStyleElement : false,
  21463. HTMLTableCaptionElement: false,
  21464. HTMLTableCellElement : false,
  21465. HTMLTableColElement : false,
  21466. HTMLTableElement : false,
  21467. HTMLTableRowElement : false,
  21468. HTMLTableSectionElement: false,
  21469. HTMLTemplateElement : false,
  21470. HTMLTextAreaElement : false,
  21471. HTMLTimeElement : false,
  21472. HTMLTitleElement : false,
  21473. HTMLTrackElement : false,
  21474. HTMLUListElement : false,
  21475. HTMLVideoElement : false,
  21476. history : false,
  21477. Image : false,
  21478. IntersectionObserver : false,
  21479. Intl : false,
  21480. length : false,
  21481. localStorage : false,
  21482. location : false,
  21483. matchMedia : false,
  21484. MediaList : false,
  21485. MediaRecorder : false,
  21486. MessageChannel : false,
  21487. MessageEvent : false,
  21488. MessagePort : false,
  21489. MouseEvent : false,
  21490. moveBy : false,
  21491. moveTo : false,
  21492. MutationObserver : false,
  21493. name : false,
  21494. Node : false,
  21495. NodeFilter : false,
  21496. NodeList : false,
  21497. Notification : false,
  21498. navigator : false,
  21499. onbeforeunload : true,
  21500. onblur : true,
  21501. onerror : true,
  21502. onfocus : true,
  21503. onload : true,
  21504. onresize : true,
  21505. onunload : true,
  21506. open : false,
  21507. openDatabase : false,
  21508. opener : false,
  21509. Option : false,
  21510. parent : false,
  21511. performance : false,
  21512. print : false,
  21513. Range : false,
  21514. requestAnimationFrame : false,
  21515. removeEventListener : false,
  21516. Request : false,
  21517. resizeBy : false,
  21518. resizeTo : false,
  21519. Response : false,
  21520. screen : false,
  21521. scroll : false,
  21522. scrollBy : false,
  21523. scrollTo : false,
  21524. sessionStorage : false,
  21525. setInterval : false,
  21526. setTimeout : false,
  21527. SharedWorker : false,
  21528. status : false,
  21529. Storage : false,
  21530. StyleSheet : false,
  21531. SVGAElement : false,
  21532. SVGAltGlyphDefElement: false,
  21533. SVGAltGlyphElement : false,
  21534. SVGAltGlyphItemElement: false,
  21535. SVGAngle : false,
  21536. SVGAnimateColorElement: false,
  21537. SVGAnimateElement : false,
  21538. SVGAnimateMotionElement: false,
  21539. SVGAnimateTransformElement: false,
  21540. SVGAnimatedAngle : false,
  21541. SVGAnimatedBoolean : false,
  21542. SVGAnimatedEnumeration: false,
  21543. SVGAnimatedInteger : false,
  21544. SVGAnimatedLength : false,
  21545. SVGAnimatedLengthList: false,
  21546. SVGAnimatedNumber : false,
  21547. SVGAnimatedNumberList: false,
  21548. SVGAnimatedPathData : false,
  21549. SVGAnimatedPoints : false,
  21550. SVGAnimatedPreserveAspectRatio: false,
  21551. SVGAnimatedRect : false,
  21552. SVGAnimatedString : false,
  21553. SVGAnimatedTransformList: false,
  21554. SVGAnimationElement : false,
  21555. SVGCSSRule : false,
  21556. SVGCircleElement : false,
  21557. SVGClipPathElement : false,
  21558. SVGColor : false,
  21559. SVGColorProfileElement: false,
  21560. SVGColorProfileRule : false,
  21561. SVGComponentTransferFunctionElement: false,
  21562. SVGCursorElement : false,
  21563. SVGDefsElement : false,
  21564. SVGDescElement : false,
  21565. SVGDocument : false,
  21566. SVGElement : false,
  21567. SVGElementInstance : false,
  21568. SVGElementInstanceList: false,
  21569. SVGEllipseElement : false,
  21570. SVGExternalResourcesRequired: false,
  21571. SVGFEBlendElement : false,
  21572. SVGFEColorMatrixElement: false,
  21573. SVGFEComponentTransferElement: false,
  21574. SVGFECompositeElement: false,
  21575. SVGFEConvolveMatrixElement: false,
  21576. SVGFEDiffuseLightingElement: false,
  21577. SVGFEDisplacementMapElement: false,
  21578. SVGFEDistantLightElement: false,
  21579. SVGFEFloodElement : false,
  21580. SVGFEFuncAElement : false,
  21581. SVGFEFuncBElement : false,
  21582. SVGFEFuncGElement : false,
  21583. SVGFEFuncRElement : false,
  21584. SVGFEGaussianBlurElement: false,
  21585. SVGFEImageElement : false,
  21586. SVGFEMergeElement : false,
  21587. SVGFEMergeNodeElement: false,
  21588. SVGFEMorphologyElement: false,
  21589. SVGFEOffsetElement : false,
  21590. SVGFEPointLightElement: false,
  21591. SVGFESpecularLightingElement: false,
  21592. SVGFESpotLightElement: false,
  21593. SVGFETileElement : false,
  21594. SVGFETurbulenceElement: false,
  21595. SVGFilterElement : false,
  21596. SVGFilterPrimitiveStandardAttributes: false,
  21597. SVGFitToViewBox : false,
  21598. SVGFontElement : false,
  21599. SVGFontFaceElement : false,
  21600. SVGFontFaceFormatElement: false,
  21601. SVGFontFaceNameElement: false,
  21602. SVGFontFaceSrcElement: false,
  21603. SVGFontFaceUriElement: false,
  21604. SVGForeignObjectElement: false,
  21605. SVGGElement : false,
  21606. SVGGlyphElement : false,
  21607. SVGGlyphRefElement : false,
  21608. SVGGradientElement : false,
  21609. SVGHKernElement : false,
  21610. SVGICCColor : false,
  21611. SVGImageElement : false,
  21612. SVGLangSpace : false,
  21613. SVGLength : false,
  21614. SVGLengthList : false,
  21615. SVGLineElement : false,
  21616. SVGLinearGradientElement: false,
  21617. SVGLocatable : false,
  21618. SVGMPathElement : false,
  21619. SVGMarkerElement : false,
  21620. SVGMaskElement : false,
  21621. SVGMatrix : false,
  21622. SVGMetadataElement : false,
  21623. SVGMissingGlyphElement: false,
  21624. SVGNumber : false,
  21625. SVGNumberList : false,
  21626. SVGPaint : false,
  21627. SVGPathElement : false,
  21628. SVGPathSeg : false,
  21629. SVGPathSegArcAbs : false,
  21630. SVGPathSegArcRel : false,
  21631. SVGPathSegClosePath : false,
  21632. SVGPathSegCurvetoCubicAbs: false,
  21633. SVGPathSegCurvetoCubicRel: false,
  21634. SVGPathSegCurvetoCubicSmoothAbs: false,
  21635. SVGPathSegCurvetoCubicSmoothRel: false,
  21636. SVGPathSegCurvetoQuadraticAbs: false,
  21637. SVGPathSegCurvetoQuadraticRel: false,
  21638. SVGPathSegCurvetoQuadraticSmoothAbs: false,
  21639. SVGPathSegCurvetoQuadraticSmoothRel: false,
  21640. SVGPathSegLinetoAbs : false,
  21641. SVGPathSegLinetoHorizontalAbs: false,
  21642. SVGPathSegLinetoHorizontalRel: false,
  21643. SVGPathSegLinetoRel : false,
  21644. SVGPathSegLinetoVerticalAbs: false,
  21645. SVGPathSegLinetoVerticalRel: false,
  21646. SVGPathSegList : false,
  21647. SVGPathSegMovetoAbs : false,
  21648. SVGPathSegMovetoRel : false,
  21649. SVGPatternElement : false,
  21650. SVGPoint : false,
  21651. SVGPointList : false,
  21652. SVGPolygonElement : false,
  21653. SVGPolylineElement : false,
  21654. SVGPreserveAspectRatio: false,
  21655. SVGRadialGradientElement: false,
  21656. SVGRect : false,
  21657. SVGRectElement : false,
  21658. SVGRenderingIntent : false,
  21659. SVGSVGElement : false,
  21660. SVGScriptElement : false,
  21661. SVGSetElement : false,
  21662. SVGStopElement : false,
  21663. SVGStringList : false,
  21664. SVGStylable : false,
  21665. SVGStyleElement : false,
  21666. SVGSwitchElement : false,
  21667. SVGSymbolElement : false,
  21668. SVGTRefElement : false,
  21669. SVGTSpanElement : false,
  21670. SVGTests : false,
  21671. SVGTextContentElement: false,
  21672. SVGTextElement : false,
  21673. SVGTextPathElement : false,
  21674. SVGTextPositioningElement: false,
  21675. SVGTitleElement : false,
  21676. SVGTransform : false,
  21677. SVGTransformList : false,
  21678. SVGTransformable : false,
  21679. SVGURIReference : false,
  21680. SVGUnitTypes : false,
  21681. SVGUseElement : false,
  21682. SVGVKernElement : false,
  21683. SVGViewElement : false,
  21684. SVGViewSpec : false,
  21685. SVGZoomAndPan : false,
  21686. Text : false,
  21687. TextDecoder : false,
  21688. TextEncoder : false,
  21689. TimeEvent : false,
  21690. top : false,
  21691. URL : false,
  21692. WebGLActiveInfo : false,
  21693. WebGLBuffer : false,
  21694. WebGLContextEvent : false,
  21695. WebGLFramebuffer : false,
  21696. WebGLProgram : false,
  21697. WebGLRenderbuffer : false,
  21698. WebGLRenderingContext: false,
  21699. WebGLShader : false,
  21700. WebGLShaderPrecisionFormat: false,
  21701. WebGLTexture : false,
  21702. WebGLUniformLocation : false,
  21703. WebSocket : false,
  21704. window : false,
  21705. Window : false,
  21706. Worker : false,
  21707. XDomainRequest : false,
  21708. XMLDocument : false,
  21709. XMLHttpRequest : false,
  21710. XMLSerializer : false,
  21711. XPathEvaluator : false,
  21712. XPathException : false,
  21713. XPathExpression : false,
  21714. XPathNamespace : false,
  21715. XPathNSResolver : false,
  21716. XPathResult : false
  21717. };
  21718. exports.devel = {
  21719. alert : false,
  21720. confirm: false,
  21721. console: false,
  21722. Debug : false,
  21723. opera : false,
  21724. prompt : false
  21725. };
  21726. exports.worker = {
  21727. importScripts : true,
  21728. onmessage : true,
  21729. postMessage : true,
  21730. self : true,
  21731. FileReaderSync : true
  21732. };
  21733. // Widely adopted global names that are not part of ECMAScript standard
  21734. exports.nonstandard = {
  21735. escape : false,
  21736. unescape: false
  21737. };
  21738. // Globals provided by popular JavaScript environments.
  21739. exports.couch = {
  21740. "require" : false,
  21741. respond : false,
  21742. getRow : false,
  21743. emit : false,
  21744. send : false,
  21745. start : false,
  21746. sum : false,
  21747. log : false,
  21748. exports : false,
  21749. module : false,
  21750. provides : false
  21751. };
  21752. exports.node = {
  21753. __filename : false,
  21754. __dirname : false,
  21755. arguments : false,
  21756. GLOBAL : false,
  21757. global : false,
  21758. module : false,
  21759. require : false,
  21760. // These globals are writeable because Node allows the following
  21761. // usage pattern: var Buffer = require("buffer").Buffer;
  21762. Buffer : true,
  21763. console : true,
  21764. exports : true,
  21765. process : true,
  21766. setTimeout : true,
  21767. clearTimeout : true,
  21768. setInterval : true,
  21769. clearInterval : true,
  21770. setImmediate : true, // v0.9.1+
  21771. clearImmediate: true // v0.9.1+
  21772. };
  21773. exports.browserify = {
  21774. __filename : false,
  21775. __dirname : false,
  21776. global : false,
  21777. module : false,
  21778. require : false,
  21779. Buffer : true,
  21780. exports : true,
  21781. process : true
  21782. };
  21783. exports.phantom = {
  21784. phantom : true,
  21785. require : true,
  21786. WebPage : true,
  21787. console : true, // in examples, but undocumented
  21788. exports : true // v1.7+
  21789. };
  21790. exports.qunit = {
  21791. asyncTest : false,
  21792. deepEqual : false,
  21793. equal : false,
  21794. expect : false,
  21795. module : false,
  21796. notDeepEqual : false,
  21797. notEqual : false,
  21798. notOk : false,
  21799. notPropEqual : false,
  21800. notStrictEqual : false,
  21801. ok : false,
  21802. propEqual : false,
  21803. QUnit : false,
  21804. raises : false,
  21805. start : false,
  21806. stop : false,
  21807. strictEqual : false,
  21808. test : false,
  21809. "throws" : false
  21810. };
  21811. exports.rhino = {
  21812. arguments : false,
  21813. defineClass : false,
  21814. deserialize : false,
  21815. gc : false,
  21816. help : false,
  21817. importClass : false,
  21818. importPackage: false,
  21819. "java" : false,
  21820. load : false,
  21821. loadClass : false,
  21822. Packages : false,
  21823. print : false,
  21824. quit : false,
  21825. readFile : false,
  21826. readUrl : false,
  21827. runCommand : false,
  21828. seal : false,
  21829. serialize : false,
  21830. spawn : false,
  21831. sync : false,
  21832. toint32 : false,
  21833. version : false
  21834. };
  21835. exports.shelljs = {
  21836. target : false,
  21837. echo : false,
  21838. exit : false,
  21839. cd : false,
  21840. pwd : false,
  21841. ls : false,
  21842. find : false,
  21843. cp : false,
  21844. rm : false,
  21845. mv : false,
  21846. mkdir : false,
  21847. test : false,
  21848. cat : false,
  21849. sed : false,
  21850. grep : false,
  21851. which : false,
  21852. dirs : false,
  21853. pushd : false,
  21854. popd : false,
  21855. env : false,
  21856. exec : false,
  21857. chmod : false,
  21858. config : false,
  21859. error : false,
  21860. tempdir : false
  21861. };
  21862. exports.typed = {
  21863. ArrayBuffer : false,
  21864. ArrayBufferView : false,
  21865. DataView : false,
  21866. Float32Array : false,
  21867. Float64Array : false,
  21868. Int16Array : false,
  21869. Int32Array : false,
  21870. Int8Array : false,
  21871. Uint16Array : false,
  21872. Uint32Array : false,
  21873. Uint8Array : false,
  21874. Uint8ClampedArray : false
  21875. };
  21876. exports.wsh = {
  21877. ActiveXObject : true,
  21878. Enumerator : true,
  21879. GetObject : true,
  21880. ScriptEngine : true,
  21881. ScriptEngineBuildVersion : true,
  21882. ScriptEngineMajorVersion : true,
  21883. ScriptEngineMinorVersion : true,
  21884. VBArray : true,
  21885. WSH : true,
  21886. WScript : true,
  21887. XDomainRequest : true
  21888. };
  21889. // Globals provided by popular JavaScript libraries.
  21890. exports.dojo = {
  21891. dojo : false,
  21892. dijit : false,
  21893. dojox : false,
  21894. define : false,
  21895. "require": false
  21896. };
  21897. exports.jquery = {
  21898. "$" : false,
  21899. jQuery : false
  21900. };
  21901. exports.mootools = {
  21902. "$" : false,
  21903. "$$" : false,
  21904. Asset : false,
  21905. Browser : false,
  21906. Chain : false,
  21907. Class : false,
  21908. Color : false,
  21909. Cookie : false,
  21910. Core : false,
  21911. Document : false,
  21912. DomReady : false,
  21913. DOMEvent : false,
  21914. DOMReady : false,
  21915. Drag : false,
  21916. Element : false,
  21917. Elements : false,
  21918. Event : false,
  21919. Events : false,
  21920. Fx : false,
  21921. Group : false,
  21922. Hash : false,
  21923. HtmlTable : false,
  21924. IFrame : false,
  21925. IframeShim : false,
  21926. InputValidator: false,
  21927. instanceOf : false,
  21928. Keyboard : false,
  21929. Locale : false,
  21930. Mask : false,
  21931. MooTools : false,
  21932. Native : false,
  21933. Options : false,
  21934. OverText : false,
  21935. Request : false,
  21936. Scroller : false,
  21937. Slick : false,
  21938. Slider : false,
  21939. Sortables : false,
  21940. Spinner : false,
  21941. Swiff : false,
  21942. Tips : false,
  21943. Type : false,
  21944. typeOf : false,
  21945. URI : false,
  21946. Window : false
  21947. };
  21948. exports.prototypejs = {
  21949. "$" : false,
  21950. "$$" : false,
  21951. "$A" : false,
  21952. "$F" : false,
  21953. "$H" : false,
  21954. "$R" : false,
  21955. "$break" : false,
  21956. "$continue" : false,
  21957. "$w" : false,
  21958. Abstract : false,
  21959. Ajax : false,
  21960. Class : false,
  21961. Enumerable : false,
  21962. Element : false,
  21963. Event : false,
  21964. Field : false,
  21965. Form : false,
  21966. Hash : false,
  21967. Insertion : false,
  21968. ObjectRange : false,
  21969. PeriodicalExecuter: false,
  21970. Position : false,
  21971. Prototype : false,
  21972. Selector : false,
  21973. Template : false,
  21974. Toggle : false,
  21975. Try : false,
  21976. Autocompleter : false,
  21977. Builder : false,
  21978. Control : false,
  21979. Draggable : false,
  21980. Draggables : false,
  21981. Droppables : false,
  21982. Effect : false,
  21983. Sortable : false,
  21984. SortableObserver : false,
  21985. Sound : false,
  21986. Scriptaculous : false
  21987. };
  21988. exports.yui = {
  21989. YUI : false,
  21990. Y : false,
  21991. YUI_config: false
  21992. };
  21993. exports.mocha = {
  21994. // Global (for config etc.)
  21995. mocha : false,
  21996. // BDD
  21997. describe : false,
  21998. xdescribe : false,
  21999. it : false,
  22000. xit : false,
  22001. context : false,
  22002. xcontext : false,
  22003. before : false,
  22004. after : false,
  22005. beforeEach : false,
  22006. afterEach : false,
  22007. // TDD
  22008. suite : false,
  22009. test : false,
  22010. setup : false,
  22011. teardown : false,
  22012. suiteSetup : false,
  22013. suiteTeardown : false
  22014. };
  22015. exports.jasmine = {
  22016. jasmine : false,
  22017. describe : false,
  22018. xdescribe : false,
  22019. it : false,
  22020. xit : false,
  22021. beforeEach : false,
  22022. afterEach : false,
  22023. setFixtures : false,
  22024. loadFixtures: false,
  22025. spyOn : false,
  22026. expect : false,
  22027. // Jasmine 1.3
  22028. runs : false,
  22029. waitsFor : false,
  22030. waits : false,
  22031. // Jasmine 2.1
  22032. beforeAll : false,
  22033. afterAll : false,
  22034. fail : false,
  22035. fdescribe : false,
  22036. fit : false,
  22037. pending : false,
  22038. // Jasmine 2.6
  22039. spyOnProperty: false
  22040. };
  22041. },{}],"jshint":[function(require,module,exports){
  22042. /*!
  22043. * JSHint, by JSHint Community.
  22044. *
  22045. * This file (and this file only) is licensed under the same slightly modified
  22046. * MIT license that JSLint is. It stops evil-doers everywhere:
  22047. *
  22048. * Copyright (c) 2002 Douglas Crockford (www.JSLint.com)
  22049. *
  22050. * Permission is hereby granted, free of charge, to any person obtaining
  22051. * a copy of this software and associated documentation files (the "Software"),
  22052. * to deal in the Software without restriction, including without limitation
  22053. * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  22054. * and/or sell copies of the Software, and to permit persons to whom
  22055. * the Software is furnished to do so, subject to the following conditions:
  22056. *
  22057. * The above copyright notice and this permission notice shall be included
  22058. * in all copies or substantial portions of the Software.
  22059. *
  22060. * The Software shall be used for Good, not Evil.
  22061. *
  22062. * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  22063. * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  22064. * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  22065. * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  22066. * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  22067. * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  22068. * DEALINGS IN THE SOFTWARE.
  22069. *
  22070. */
  22071. /*jshint quotmark:double */
  22072. /*exported console */
  22073. var _ = require("lodash");
  22074. var events = require("events");
  22075. var vars = require("./vars.js");
  22076. var messages = require("./messages.js");
  22077. var Lexer = require("./lex.js").Lexer;
  22078. var reg = require("./reg.js");
  22079. var state = require("./state.js").state;
  22080. var style = require("./style.js");
  22081. var options = require("./options.js");
  22082. var scopeManager = require("./scope-manager.js");
  22083. // We need this module here because environments such as IE and Rhino
  22084. // don't necessarilly expose the 'console' API and browserify uses
  22085. // it to log things. It's a sad state of affair, really.
  22086. var console = require("console-browserify");
  22087. // We build the application inside a function so that we produce only a singleton
  22088. // variable. That function will be invoked immediately, and its return value is
  22089. // the JSHINT function itself.
  22090. var JSHINT = (function() {
  22091. "use strict";
  22092. var api, // Extension API
  22093. // These are operators that should not be used with the ! operator.
  22094. bang = {
  22095. "<" : true,
  22096. "<=" : true,
  22097. "==" : true,
  22098. "===": true,
  22099. "!==": true,
  22100. "!=" : true,
  22101. ">" : true,
  22102. ">=" : true,
  22103. "+" : true,
  22104. "-" : true,
  22105. "*" : true,
  22106. "/" : true,
  22107. "%" : true
  22108. },
  22109. declared, // Globals that were declared using /*global ... */ syntax.
  22110. functions, // All of the functions
  22111. inblock,
  22112. indent,
  22113. lookahead,
  22114. lex,
  22115. member,
  22116. membersOnly,
  22117. predefined, // Global variables defined by option
  22118. urls,
  22119. extraModules = [],
  22120. emitter = new events.EventEmitter();
  22121. function checkOption(name, t) {
  22122. name = name.trim();
  22123. if (/^[+-]W\d{3}$/g.test(name)) {
  22124. return true;
  22125. }
  22126. if (options.validNames.indexOf(name) === -1) {
  22127. if (t.type !== "jslint" && !_.has(options.removed, name)) {
  22128. error("E001", t, name);
  22129. return false;
  22130. }
  22131. }
  22132. return true;
  22133. }
  22134. function isString(obj) {
  22135. return Object.prototype.toString.call(obj) === "[object String]";
  22136. }
  22137. function isIdentifier(tkn, value) {
  22138. if (!tkn)
  22139. return false;
  22140. if (!tkn.identifier || tkn.value !== value)
  22141. return false;
  22142. return true;
  22143. }
  22144. function isReserved(token) {
  22145. if (!token.reserved) {
  22146. return false;
  22147. }
  22148. var meta = token.meta;
  22149. if (meta && meta.isFutureReservedWord) {
  22150. if (meta.moduleOnly && !state.option.module) {
  22151. return false;
  22152. }
  22153. if (state.inES5()) {
  22154. // ES3 FutureReservedWord in an ES5 environment.
  22155. if (!meta.es5) {
  22156. return false;
  22157. }
  22158. // Some ES5 FutureReservedWord identifiers are active only
  22159. // within a strict mode environment.
  22160. if (meta.strictOnly) {
  22161. if (!state.option.strict && !state.isStrict()) {
  22162. return false;
  22163. }
  22164. }
  22165. if (token.isProperty) {
  22166. return false;
  22167. }
  22168. }
  22169. }
  22170. return true;
  22171. }
  22172. function supplant(str, data) {
  22173. return str.replace(/\{([^{}]*)\}/g, function(a, b) {
  22174. var r = data[b];
  22175. return typeof r === "string" || typeof r === "number" ? r : a;
  22176. });
  22177. }
  22178. function combine(dest, src) {
  22179. Object.keys(src).forEach(function(name) {
  22180. if (_.has(JSHINT.blacklist, name)) return;
  22181. dest[name] = src[name];
  22182. });
  22183. }
  22184. function processenforceall() {
  22185. if (state.option.enforceall) {
  22186. for (var enforceopt in options.bool.enforcing) {
  22187. if (state.option[enforceopt] === undefined &&
  22188. !options.noenforceall[enforceopt]) {
  22189. state.option[enforceopt] = true;
  22190. }
  22191. }
  22192. for (var relaxopt in options.bool.relaxing) {
  22193. if (state.option[relaxopt] === undefined) {
  22194. state.option[relaxopt] = false;
  22195. }
  22196. }
  22197. }
  22198. }
  22199. /**
  22200. * Apply all linting options according to the status of the `state` object.
  22201. */
  22202. function applyOptions() {
  22203. var badESOpt = null;
  22204. processenforceall();
  22205. /**
  22206. * TODO: Remove in JSHint 3
  22207. */
  22208. badESOpt = state.inferEsVersion();
  22209. if (badESOpt) {
  22210. quit("E059", state.tokens.next, "esversion", badESOpt);
  22211. }
  22212. if (state.inES5()) {
  22213. combine(predefined, vars.ecmaIdentifiers[5]);
  22214. }
  22215. if (state.inES6()) {
  22216. combine(predefined, vars.ecmaIdentifiers[6]);
  22217. }
  22218. /**
  22219. * Use `in` to check for the presence of any explicitly-specified value for
  22220. * `globalstrict` because both `true` and `false` should trigger an error.
  22221. */
  22222. if (state.option.strict === "global" && "globalstrict" in state.option) {
  22223. quit("E059", state.tokens.next, "strict", "globalstrict");
  22224. }
  22225. if (state.option.module) {
  22226. /**
  22227. * TODO: Extend this restriction to *all* ES6-specific options.
  22228. */
  22229. if (!state.inES6()) {
  22230. warning("W134", state.tokens.next, "module", 6);
  22231. }
  22232. }
  22233. if (state.option.couch) {
  22234. combine(predefined, vars.couch);
  22235. }
  22236. if (state.option.qunit) {
  22237. combine(predefined, vars.qunit);
  22238. }
  22239. if (state.option.rhino) {
  22240. combine(predefined, vars.rhino);
  22241. }
  22242. if (state.option.shelljs) {
  22243. combine(predefined, vars.shelljs);
  22244. combine(predefined, vars.node);
  22245. }
  22246. if (state.option.typed) {
  22247. combine(predefined, vars.typed);
  22248. }
  22249. if (state.option.phantom) {
  22250. combine(predefined, vars.phantom);
  22251. }
  22252. if (state.option.prototypejs) {
  22253. combine(predefined, vars.prototypejs);
  22254. }
  22255. if (state.option.node) {
  22256. combine(predefined, vars.node);
  22257. combine(predefined, vars.typed);
  22258. }
  22259. if (state.option.devel) {
  22260. combine(predefined, vars.devel);
  22261. }
  22262. if (state.option.dojo) {
  22263. combine(predefined, vars.dojo);
  22264. }
  22265. if (state.option.browser) {
  22266. combine(predefined, vars.browser);
  22267. combine(predefined, vars.typed);
  22268. }
  22269. if (state.option.browserify) {
  22270. combine(predefined, vars.browser);
  22271. combine(predefined, vars.typed);
  22272. combine(predefined, vars.browserify);
  22273. }
  22274. if (state.option.nonstandard) {
  22275. combine(predefined, vars.nonstandard);
  22276. }
  22277. if (state.option.jasmine) {
  22278. combine(predefined, vars.jasmine);
  22279. }
  22280. if (state.option.jquery) {
  22281. combine(predefined, vars.jquery);
  22282. }
  22283. if (state.option.mootools) {
  22284. combine(predefined, vars.mootools);
  22285. }
  22286. if (state.option.worker) {
  22287. combine(predefined, vars.worker);
  22288. }
  22289. if (state.option.wsh) {
  22290. combine(predefined, vars.wsh);
  22291. }
  22292. if (state.option.yui) {
  22293. combine(predefined, vars.yui);
  22294. }
  22295. if (state.option.mocha) {
  22296. combine(predefined, vars.mocha);
  22297. }
  22298. }
  22299. // Produce an error warning.
  22300. function quit(code, token, a, b) {
  22301. var percentage = Math.floor((token.line / state.lines.length) * 100);
  22302. var message = messages.errors[code].desc;
  22303. var exception = {
  22304. name: "JSHintError",
  22305. line: token.line,
  22306. character: token.from,
  22307. message: message + " (" + percentage + "% scanned).",
  22308. raw: message,
  22309. code: code,
  22310. a: a,
  22311. b: b
  22312. };
  22313. exception.reason = supplant(message, exception) + " (" + percentage +
  22314. "% scanned).";
  22315. throw exception;
  22316. }
  22317. function removeIgnoredMessages() {
  22318. var ignored = state.ignoredLines;
  22319. if (_.isEmpty(ignored)) return;
  22320. JSHINT.errors = _.reject(JSHINT.errors, function(err) { return ignored[err.line] });
  22321. }
  22322. function warning(code, t, a, b, c, d) {
  22323. var ch, l, w, msg;
  22324. if (/^W\d{3}$/.test(code)) {
  22325. if (state.ignored[code])
  22326. return;
  22327. msg = messages.warnings[code];
  22328. } else if (/E\d{3}/.test(code)) {
  22329. msg = messages.errors[code];
  22330. } else if (/I\d{3}/.test(code)) {
  22331. msg = messages.info[code];
  22332. }
  22333. t = t || state.tokens.next || {};
  22334. if (t.id === "(end)") { // `~
  22335. t = state.tokens.curr;
  22336. }
  22337. l = t.line;
  22338. ch = t.from;
  22339. w = {
  22340. id: "(error)",
  22341. raw: msg.desc,
  22342. code: msg.code,
  22343. evidence: state.lines[l - 1] || "",
  22344. line: l,
  22345. character: ch,
  22346. scope: JSHINT.scope,
  22347. a: a,
  22348. b: b,
  22349. c: c,
  22350. d: d
  22351. };
  22352. w.reason = supplant(msg.desc, w);
  22353. JSHINT.errors.push(w);
  22354. removeIgnoredMessages();
  22355. if (JSHINT.errors.length >= state.option.maxerr)
  22356. quit("E043", t);
  22357. return w;
  22358. }
  22359. function warningAt(m, l, ch, a, b, c, d) {
  22360. return warning(m, {
  22361. line: l,
  22362. from: ch
  22363. }, a, b, c, d);
  22364. }
  22365. function error(m, t, a, b, c, d) {
  22366. warning(m, t, a, b, c, d);
  22367. }
  22368. function errorAt(m, l, ch, a, b, c, d) {
  22369. return error(m, {
  22370. line: l,
  22371. from: ch
  22372. }, a, b, c, d);
  22373. }
  22374. // Tracking of "internal" scripts, like eval containing a static string
  22375. function addEvalCode(elem, token) {
  22376. JSHINT.internals.push({
  22377. id: "(internal)",
  22378. elem: elem,
  22379. token: token,
  22380. code: token.value.replace(/([^\\])(\\*)\2\\n/g, "$1\n")
  22381. });
  22382. }
  22383. /**
  22384. * Process an inline linting directive
  22385. *
  22386. * @param {Token} directiveToken - the directive-bearing comment token
  22387. * @param {Token} previous - the token that preceeds the directive
  22388. */
  22389. function lintingDirective(directiveToken, previous) {
  22390. var body = directiveToken.body.split(",")
  22391. .map(function(s) { return s.trim(); });
  22392. var predef = {};
  22393. if (directiveToken.type === "falls through") {
  22394. previous.caseFallsThrough = true;
  22395. return;
  22396. }
  22397. if (directiveToken.type === "globals") {
  22398. body.forEach(function(g, idx) {
  22399. g = g.split(":");
  22400. var key = g[0].trim();
  22401. var val = (g[1] || "").trim();
  22402. if (key === "-" || !key.length) {
  22403. // Ignore trailing comma
  22404. if (idx > 0 && idx === body.length - 1) {
  22405. return;
  22406. }
  22407. error("E002", directiveToken);
  22408. return;
  22409. }
  22410. if (key.charAt(0) === "-") {
  22411. key = key.slice(1);
  22412. val = false;
  22413. JSHINT.blacklist[key] = key;
  22414. delete predefined[key];
  22415. } else {
  22416. predef[key] = (val === "true");
  22417. }
  22418. });
  22419. combine(predefined, predef);
  22420. for (var key in predef) {
  22421. if (_.has(predef, key)) {
  22422. declared[key] = directiveToken;
  22423. }
  22424. }
  22425. }
  22426. if (directiveToken.type === "exported") {
  22427. body.forEach(function(e, idx) {
  22428. if (!e.length) {
  22429. // Ignore trailing comma
  22430. if (idx > 0 && idx === body.length - 1) {
  22431. return;
  22432. }
  22433. error("E002", directiveToken);
  22434. return;
  22435. }
  22436. state.funct["(scope)"].addExported(e);
  22437. });
  22438. }
  22439. if (directiveToken.type === "members") {
  22440. membersOnly = membersOnly || {};
  22441. body.forEach(function(m) {
  22442. var ch1 = m.charAt(0);
  22443. var ch2 = m.charAt(m.length - 1);
  22444. if (ch1 === ch2 && (ch1 === "\"" || ch1 === "'")) {
  22445. m = m
  22446. .substr(1, m.length - 2)
  22447. .replace("\\\"", "\"");
  22448. }
  22449. membersOnly[m] = false;
  22450. });
  22451. }
  22452. var numvals = [
  22453. "maxstatements",
  22454. "maxparams",
  22455. "maxdepth",
  22456. "maxcomplexity",
  22457. "maxerr",
  22458. "maxlen",
  22459. "indent"
  22460. ];
  22461. if (directiveToken.type === "jshint" || directiveToken.type === "jslint") {
  22462. body.forEach(function(g) {
  22463. g = g.split(":");
  22464. var key = g[0].trim();
  22465. var val = (g[1] || "").trim();
  22466. if (!checkOption(key, directiveToken)) {
  22467. return;
  22468. }
  22469. if (numvals.indexOf(key) >= 0) {
  22470. // GH988 - numeric options can be disabled by setting them to `false`
  22471. if (val !== "false") {
  22472. val = +val;
  22473. if (typeof val !== "number" || !isFinite(val) || val <= 0 || Math.floor(val) !== val) {
  22474. error("E032", directiveToken, g[1].trim());
  22475. return;
  22476. }
  22477. state.option[key] = val;
  22478. } else {
  22479. state.option[key] = key === "indent" ? 4 : false;
  22480. }
  22481. return;
  22482. }
  22483. if (key === "validthis") {
  22484. // `validthis` is valid only within a function scope.
  22485. if (state.funct["(global)"])
  22486. return void error("E009");
  22487. if (val !== "true" && val !== "false")
  22488. return void error("E002", directiveToken);
  22489. state.option.validthis = (val === "true");
  22490. return;
  22491. }
  22492. if (key === "quotmark") {
  22493. switch (val) {
  22494. case "true":
  22495. case "false":
  22496. state.option.quotmark = (val === "true");
  22497. break;
  22498. case "double":
  22499. case "single":
  22500. state.option.quotmark = val;
  22501. break;
  22502. default:
  22503. error("E002", directiveToken);
  22504. }
  22505. return;
  22506. }
  22507. if (key === "shadow") {
  22508. switch (val) {
  22509. case "true":
  22510. state.option.shadow = true;
  22511. break;
  22512. case "outer":
  22513. state.option.shadow = "outer";
  22514. break;
  22515. case "false":
  22516. case "inner":
  22517. state.option.shadow = "inner";
  22518. break;
  22519. default:
  22520. error("E002", directiveToken);
  22521. }
  22522. return;
  22523. }
  22524. if (key === "unused") {
  22525. switch (val) {
  22526. case "true":
  22527. state.option.unused = true;
  22528. break;
  22529. case "false":
  22530. state.option.unused = false;
  22531. break;
  22532. case "vars":
  22533. case "strict":
  22534. state.option.unused = val;
  22535. break;
  22536. default:
  22537. error("E002", directiveToken);
  22538. }
  22539. return;
  22540. }
  22541. if (key === "latedef") {
  22542. switch (val) {
  22543. case "true":
  22544. state.option.latedef = true;
  22545. break;
  22546. case "false":
  22547. state.option.latedef = false;
  22548. break;
  22549. case "nofunc":
  22550. state.option.latedef = "nofunc";
  22551. break;
  22552. default:
  22553. error("E002", directiveToken);
  22554. }
  22555. return;
  22556. }
  22557. if (key === "ignore") {
  22558. switch (val) {
  22559. case "line":
  22560. state.ignoredLines[directiveToken.line] = true;
  22561. removeIgnoredMessages();
  22562. break;
  22563. default:
  22564. error("E002", directiveToken);
  22565. }
  22566. return;
  22567. }
  22568. if (key === "strict") {
  22569. switch (val) {
  22570. case "true":
  22571. state.option.strict = true;
  22572. break;
  22573. case "false":
  22574. state.option.strict = false;
  22575. break;
  22576. case "global":
  22577. case "implied":
  22578. state.option.strict = val;
  22579. break;
  22580. default:
  22581. error("E002", directiveToken);
  22582. }
  22583. return;
  22584. }
  22585. if (key === "module") {
  22586. /**
  22587. * TODO: Extend this restriction to *all* "environmental" options.
  22588. */
  22589. if (!hasParsedCode(state.funct)) {
  22590. error("E055", directiveToken, "module");
  22591. }
  22592. }
  22593. if (key === "esversion") {
  22594. switch (val) {
  22595. case "3":
  22596. case "5":
  22597. case "6":
  22598. case "2015":
  22599. state.option.moz = false;
  22600. state.option.esversion = +val;
  22601. break;
  22602. default:
  22603. error("E002", directiveToken);
  22604. }
  22605. if (!hasParsedCode(state.funct)) {
  22606. error("E055", directiveToken, "esversion");
  22607. }
  22608. return;
  22609. }
  22610. var match = /^([+-])(W\d{3})$/g.exec(key);
  22611. if (match) {
  22612. // ignore for -W..., unignore for +W...
  22613. state.ignored[match[2]] = (match[1] === "-");
  22614. return;
  22615. }
  22616. var tn;
  22617. if (val === "true" || val === "false") {
  22618. if (directiveToken.type === "jslint") {
  22619. tn = options.renamed[key] || key;
  22620. state.option[tn] = (val === "true");
  22621. if (options.inverted[tn] !== undefined) {
  22622. state.option[tn] = !state.option[tn];
  22623. }
  22624. } else {
  22625. state.option[key] = (val === "true");
  22626. }
  22627. return;
  22628. }
  22629. error("E002", directiveToken);
  22630. });
  22631. applyOptions();
  22632. }
  22633. }
  22634. /**
  22635. * Return a token beyond the token available in `state.tokens.next`. If no
  22636. * such token exists, return the "(end)" token. This function is used to
  22637. * determine parsing strategies in cases where the value of the next token
  22638. * does not provide sufficient information, as is the case with `for` loops,
  22639. * e.g.:
  22640. *
  22641. * for ( var i in ...
  22642. *
  22643. * versus:
  22644. *
  22645. * for ( var i = ...
  22646. *
  22647. * @param {number} [p] - offset of desired token; defaults to 0
  22648. *
  22649. * @returns {token}
  22650. */
  22651. function peek(p) {
  22652. var i = p || 0, j = lookahead.length, t;
  22653. if (i < j) {
  22654. return lookahead[i];
  22655. }
  22656. while (j <= i) {
  22657. t = lex.token();
  22658. // When the lexer is exhausted, this function should produce the "(end)"
  22659. // token, even in cases where the requested token is beyond the end of
  22660. // the input stream.
  22661. if (!t) {
  22662. // If the lookahead buffer is empty, the expected "(end)" token was
  22663. // already emitted by the most recent invocation of `advance` and is
  22664. // available as the next token.
  22665. if (!lookahead.length) {
  22666. return state.tokens.next;
  22667. }
  22668. return lookahead[j - 1];
  22669. }
  22670. lookahead[j] = t;
  22671. j += 1;
  22672. }
  22673. return t;
  22674. }
  22675. function peekIgnoreEOL() {
  22676. var i = 0;
  22677. var t;
  22678. do {
  22679. t = peek(i++);
  22680. } while (t.id === "(endline)");
  22681. return t;
  22682. }
  22683. // Produce the next token. It looks for programming errors.
  22684. function advance(id, t) {
  22685. switch (state.tokens.curr.id) {
  22686. case "(number)":
  22687. if (state.tokens.next.id === ".") {
  22688. warning("W005", state.tokens.curr);
  22689. }
  22690. break;
  22691. case "-":
  22692. if (state.tokens.next.id === "-" || state.tokens.next.id === "--") {
  22693. warning("W006");
  22694. }
  22695. break;
  22696. case "+":
  22697. if (state.tokens.next.id === "+" || state.tokens.next.id === "++") {
  22698. warning("W007");
  22699. }
  22700. break;
  22701. }
  22702. if (id && state.tokens.next.id !== id) {
  22703. if (t) {
  22704. if (state.tokens.next.id === "(end)") {
  22705. error("E019", t, t.id);
  22706. } else {
  22707. error("E020", state.tokens.next, id, t.id, t.line, state.tokens.next.value);
  22708. }
  22709. } else if (state.tokens.next.type !== "(identifier)" || state.tokens.next.value !== id) {
  22710. warning("W116", state.tokens.next, id, state.tokens.next.value);
  22711. }
  22712. }
  22713. state.tokens.prev = state.tokens.curr;
  22714. state.tokens.curr = state.tokens.next;
  22715. for (;;) {
  22716. state.tokens.next = lookahead.shift() || lex.token();
  22717. if (!state.tokens.next) { // No more tokens left, give up
  22718. quit("E041", state.tokens.curr);
  22719. }
  22720. if (state.tokens.next.id === "(end)" || state.tokens.next.id === "(error)") {
  22721. return;
  22722. }
  22723. if (state.tokens.next.check) {
  22724. state.tokens.next.check();
  22725. }
  22726. if (state.tokens.next.isSpecial) {
  22727. lintingDirective(state.tokens.next, state.tokens.curr);
  22728. } else {
  22729. if (state.tokens.next.id !== "(endline)") {
  22730. break;
  22731. }
  22732. }
  22733. }
  22734. }
  22735. /**
  22736. * Determine whether a given token is an operator.
  22737. *
  22738. * @param {token} token
  22739. *
  22740. * @returns {boolean}
  22741. */
  22742. function isOperator(token) {
  22743. return token.first || token.right || token.left || token.id === "yield";
  22744. }
  22745. function isEndOfExpr(curr, next) {
  22746. if (arguments.length === 0) {
  22747. curr = state.tokens.curr;
  22748. next = state.tokens.next;
  22749. }
  22750. if (next.id === ";" || next.id === "}" || next.id === ":") {
  22751. return true;
  22752. }
  22753. if (next.infix === curr.infix || curr.ltBoundary === "after" ||
  22754. next.ltBoundary === "before") {
  22755. return curr.line !== startLine(next);
  22756. }
  22757. return false;
  22758. }
  22759. // This is the heart of JSHINT, the Pratt parser. In addition to parsing, it
  22760. // is looking for ad hoc lint patterns. We add .fud to Pratt's model, which is
  22761. // like .nud except that it is only used on the first token of a statement.
  22762. // Having .fud makes it much easier to define statement-oriented languages like
  22763. // JavaScript. I retained Pratt's nomenclature.
  22764. // .nud Null denotation
  22765. // .fud First null denotation
  22766. // .led Left denotation
  22767. // lbp Left binding power
  22768. // rbp Right binding power
  22769. // They are elements of the parsing method called Top Down Operator Precedence.
  22770. function expression(rbp, initial) {
  22771. var left, isArray = false, isObject = false, isLetExpr = false;
  22772. state.nameStack.push();
  22773. // if current expression is a let expression
  22774. if (!initial && state.tokens.next.value === "let" && peek(0).value === "(") {
  22775. if (!state.inMoz()) {
  22776. warning("W118", state.tokens.next, "let expressions");
  22777. }
  22778. isLetExpr = true;
  22779. // create a new block scope we use only for the current expression
  22780. state.funct["(scope)"].stack();
  22781. advance("let");
  22782. advance("(");
  22783. state.tokens.prev.fud();
  22784. advance(")");
  22785. }
  22786. if (state.tokens.next.id === "(end)")
  22787. error("E006", state.tokens.curr);
  22788. advance();
  22789. if (initial) {
  22790. state.funct["(verb)"] = state.tokens.curr.value;
  22791. state.tokens.curr.beginsStmt = true;
  22792. }
  22793. if (initial === true && state.tokens.curr.fud) {
  22794. left = state.tokens.curr.fud();
  22795. } else {
  22796. if (state.tokens.curr.nud) {
  22797. left = state.tokens.curr.nud(rbp);
  22798. } else {
  22799. error("E030", state.tokens.curr, state.tokens.curr.id);
  22800. }
  22801. while (rbp < state.tokens.next.lbp && !isEndOfExpr()) {
  22802. isArray = state.tokens.curr.value === "Array";
  22803. isObject = state.tokens.curr.value === "Object";
  22804. // #527, new Foo.Array(), Foo.Array(), new Foo.Object(), Foo.Object()
  22805. // Line breaks in IfStatement heads exist to satisfy the checkJSHint
  22806. // "Line too long." error.
  22807. if (left && (left.value || (left.first && left.first.value))) {
  22808. // If the left.value is not "new", or the left.first.value is a "."
  22809. // then safely assume that this is not "new Array()" and possibly
  22810. // not "new Object()"...
  22811. if (left.value !== "new" ||
  22812. (left.first && left.first.value && left.first.value === ".")) {
  22813. isArray = false;
  22814. // ...In the case of Object, if the left.value and state.tokens.curr.value
  22815. // are not equal, then safely assume that this not "new Object()"
  22816. if (left.value !== state.tokens.curr.value) {
  22817. isObject = false;
  22818. }
  22819. }
  22820. }
  22821. advance();
  22822. if (isArray && state.tokens.curr.id === "(" && state.tokens.next.id === ")") {
  22823. warning("W009", state.tokens.curr);
  22824. }
  22825. if (isObject && state.tokens.curr.id === "(" && state.tokens.next.id === ")") {
  22826. warning("W010", state.tokens.curr);
  22827. }
  22828. if (left && state.tokens.curr.led) {
  22829. left = state.tokens.curr.led(left);
  22830. } else {
  22831. error("E033", state.tokens.curr, state.tokens.curr.id);
  22832. }
  22833. }
  22834. }
  22835. if (isLetExpr) {
  22836. state.funct["(scope)"].unstack();
  22837. }
  22838. state.nameStack.pop();
  22839. return left;
  22840. }
  22841. // Functions for conformance of style.
  22842. function startLine(token) {
  22843. return token.startLine || token.line;
  22844. }
  22845. function nobreaknonadjacent(left, right) {
  22846. if (!state.option.laxbreak && left.line !== startLine(right)) {
  22847. warning("W014", right, right.value);
  22848. }
  22849. }
  22850. function nolinebreak(t) {
  22851. t = t;
  22852. if (t.line !== startLine(state.tokens.next)) {
  22853. warning("E022", t, t.value);
  22854. }
  22855. }
  22856. function nobreakcomma(left, right) {
  22857. if (left.line !== startLine(right)) {
  22858. if (!state.option.laxcomma) {
  22859. if (parseComma.first) {
  22860. warning("I001");
  22861. parseComma.first = false;
  22862. }
  22863. warning("W014", left, right.value);
  22864. }
  22865. }
  22866. }
  22867. function parseComma(opts) {
  22868. opts = opts || {};
  22869. if (!opts.peek) {
  22870. nobreakcomma(state.tokens.curr, state.tokens.next);
  22871. advance(",");
  22872. } else {
  22873. nobreakcomma(state.tokens.prev, state.tokens.curr);
  22874. }
  22875. if (state.tokens.next.identifier && !(opts.property && state.inES5())) {
  22876. // Keywords that cannot follow a comma operator.
  22877. switch (state.tokens.next.value) {
  22878. case "break":
  22879. case "case":
  22880. case "catch":
  22881. case "continue":
  22882. case "default":
  22883. case "do":
  22884. case "else":
  22885. case "finally":
  22886. case "for":
  22887. case "if":
  22888. case "in":
  22889. case "instanceof":
  22890. case "return":
  22891. case "switch":
  22892. case "throw":
  22893. case "try":
  22894. case "var":
  22895. case "let":
  22896. case "while":
  22897. case "with":
  22898. error("E024", state.tokens.next, state.tokens.next.value);
  22899. return false;
  22900. }
  22901. }
  22902. if (state.tokens.next.type === "(punctuator)") {
  22903. switch (state.tokens.next.value) {
  22904. case "}":
  22905. case "]":
  22906. case ",":
  22907. if (opts.allowTrailing) {
  22908. return true;
  22909. }
  22910. /* falls through */
  22911. case ")":
  22912. error("E024", state.tokens.next, state.tokens.next.value);
  22913. return false;
  22914. }
  22915. }
  22916. return true;
  22917. }
  22918. // Functional constructors for making the symbols that will be inherited by
  22919. // tokens.
  22920. function symbol(s, p) {
  22921. var x = state.syntax[s];
  22922. if (!x || typeof x !== "object") {
  22923. state.syntax[s] = x = {
  22924. id: s,
  22925. lbp: p,
  22926. value: s
  22927. };
  22928. }
  22929. return x;
  22930. }
  22931. function delim(s) {
  22932. var x = symbol(s, 0);
  22933. x.delim = true;
  22934. return x;
  22935. }
  22936. function stmt(s, f) {
  22937. var x = delim(s);
  22938. x.identifier = x.reserved = true;
  22939. x.fud = f;
  22940. return x;
  22941. }
  22942. function blockstmt(s, f) {
  22943. var x = stmt(s, f);
  22944. x.block = true;
  22945. return x;
  22946. }
  22947. function reserveName(x) {
  22948. var c = x.id.charAt(0);
  22949. if ((c >= "a" && c <= "z") || (c >= "A" && c <= "Z")) {
  22950. x.identifier = x.reserved = true;
  22951. }
  22952. return x;
  22953. }
  22954. function prefix(s, f) {
  22955. var x = symbol(s, 150);
  22956. reserveName(x);
  22957. x.nud = (typeof f === "function") ? f : function() {
  22958. this.arity = "unary";
  22959. this.right = expression(150);
  22960. if (this.id === "++" || this.id === "--") {
  22961. if (state.option.plusplus) {
  22962. warning("W016", this, this.id);
  22963. }
  22964. if (this.right) {
  22965. checkLeftSideAssign(this.right, this);
  22966. }
  22967. }
  22968. return this;
  22969. };
  22970. return x;
  22971. }
  22972. function type(s, f) {
  22973. var x = delim(s);
  22974. x.type = s;
  22975. x.nud = f;
  22976. return x;
  22977. }
  22978. function reserve(name, func) {
  22979. var x = type(name, func);
  22980. x.identifier = true;
  22981. x.reserved = true;
  22982. return x;
  22983. }
  22984. function FutureReservedWord(name, meta) {
  22985. var x = type(name, (meta && meta.nud) || function() {
  22986. return this;
  22987. });
  22988. meta = meta || {};
  22989. meta.isFutureReservedWord = true;
  22990. x.value = name;
  22991. x.identifier = true;
  22992. x.reserved = true;
  22993. x.meta = meta;
  22994. return x;
  22995. }
  22996. function reservevar(s, v) {
  22997. return reserve(s, function() {
  22998. if (typeof v === "function") {
  22999. v(this);
  23000. }
  23001. return this;
  23002. });
  23003. }
  23004. function infix(s, f, p, w) {
  23005. var x = symbol(s, p);
  23006. reserveName(x);
  23007. x.infix = true;
  23008. x.led = function(left) {
  23009. if (!w) {
  23010. nobreaknonadjacent(state.tokens.prev, state.tokens.curr);
  23011. }
  23012. if ((s === "in" || s === "instanceof") && left.id === "!") {
  23013. warning("W018", left, "!");
  23014. }
  23015. if (typeof f === "function") {
  23016. return f(left, this);
  23017. } else {
  23018. this.left = left;
  23019. this.right = expression(p);
  23020. return this;
  23021. }
  23022. };
  23023. return x;
  23024. }
  23025. function application(s) {
  23026. var x = symbol(s, 42);
  23027. x.infix = true;
  23028. x.led = function(left) {
  23029. nobreaknonadjacent(state.tokens.prev, state.tokens.curr);
  23030. this.left = left;
  23031. this.right = doFunction({ type: "arrow", loneArg: left });
  23032. return this;
  23033. };
  23034. return x;
  23035. }
  23036. function relation(s, f) {
  23037. var x = symbol(s, 100);
  23038. x.infix = true;
  23039. x.led = function(left) {
  23040. nobreaknonadjacent(state.tokens.prev, state.tokens.curr);
  23041. this.left = left;
  23042. var right = this.right = expression(100);
  23043. if (isIdentifier(left, "NaN") || isIdentifier(right, "NaN")) {
  23044. warning("W019", this);
  23045. } else if (f) {
  23046. f.apply(this, [left, right]);
  23047. }
  23048. if (!left || !right) {
  23049. quit("E041", state.tokens.curr);
  23050. }
  23051. if (left.id === "!") {
  23052. warning("W018", left, "!");
  23053. }
  23054. if (right.id === "!") {
  23055. warning("W018", right, "!");
  23056. }
  23057. return this;
  23058. };
  23059. return x;
  23060. }
  23061. var typeofValues = {};
  23062. typeofValues.legacy = [
  23063. // E4X extended the `typeof` operator to return "xml" for the XML and
  23064. // XMLList types it introduced.
  23065. // Ref: 11.3.2 The typeof Operator
  23066. // http://www.ecma-international.org/publications/files/ECMA-ST/Ecma-357.pdf
  23067. "xml",
  23068. // IE<9 reports "unknown" when the `typeof` operator is applied to an
  23069. // object existing across a COM+ bridge. In lieu of official documentation
  23070. // (which does not exist), see:
  23071. // http://robertnyman.com/2005/12/21/what-is-typeof-unknown/
  23072. "unknown"
  23073. ];
  23074. typeofValues.es3 = [
  23075. "undefined", "boolean", "number", "string", "function", "object",
  23076. ];
  23077. typeofValues.es3 = typeofValues.es3.concat(typeofValues.legacy);
  23078. typeofValues.es6 = typeofValues.es3.concat("symbol");
  23079. // Checks whether the 'typeof' operator is used with the correct
  23080. // value. For docs on 'typeof' see:
  23081. // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/typeof
  23082. function isTypoTypeof(left, right, state) {
  23083. var values;
  23084. if (state.option.notypeof)
  23085. return false;
  23086. if (!left || !right)
  23087. return false;
  23088. values = state.inES6() ? typeofValues.es6 : typeofValues.es3;
  23089. if (right.type === "(identifier)" && right.value === "typeof" && left.type === "(string)")
  23090. return !_.includes(values, left.value);
  23091. return false;
  23092. }
  23093. function isGlobalEval(left, state) {
  23094. var isGlobal = false;
  23095. // permit methods to refer to an "eval" key in their own context
  23096. if (left.type === "this" && state.funct["(context)"] === null) {
  23097. isGlobal = true;
  23098. }
  23099. // permit use of "eval" members of objects
  23100. else if (left.type === "(identifier)") {
  23101. if (state.option.node && left.value === "global") {
  23102. isGlobal = true;
  23103. }
  23104. else if (state.option.browser && (left.value === "window" || left.value === "document")) {
  23105. isGlobal = true;
  23106. }
  23107. }
  23108. return isGlobal;
  23109. }
  23110. function findNativePrototype(left) {
  23111. var natives = [
  23112. "Array", "ArrayBuffer", "Boolean", "Collator", "DataView", "Date",
  23113. "DateTimeFormat", "Error", "EvalError", "Float32Array", "Float64Array",
  23114. "Function", "Infinity", "Intl", "Int16Array", "Int32Array", "Int8Array",
  23115. "Iterator", "Number", "NumberFormat", "Object", "RangeError",
  23116. "ReferenceError", "RegExp", "StopIteration", "String", "SyntaxError",
  23117. "TypeError", "Uint16Array", "Uint32Array", "Uint8Array", "Uint8ClampedArray",
  23118. "URIError"
  23119. ];
  23120. function walkPrototype(obj) {
  23121. if (typeof obj !== "object") return;
  23122. return obj.right === "prototype" ? obj : walkPrototype(obj.left);
  23123. }
  23124. function walkNative(obj) {
  23125. while (!obj.identifier && typeof obj.left === "object")
  23126. obj = obj.left;
  23127. if (obj.identifier && natives.indexOf(obj.value) >= 0 &&
  23128. state.funct["(scope)"].isPredefined(obj.value)) {
  23129. return obj.value;
  23130. }
  23131. }
  23132. var prototype = walkPrototype(left);
  23133. if (prototype) return walkNative(prototype);
  23134. }
  23135. /**
  23136. * Checks the left hand side of an assignment for issues, returns if ok
  23137. * @param {token} left - the left hand side of the assignment
  23138. * @param {token=} assignToken - the token for the assignment, used for reporting
  23139. * @param {object=} options - optional object
  23140. * @param {boolean} options.allowDestructuring - whether to allow destructuting binding
  23141. * @returns {boolean} Whether the left hand side is OK
  23142. */
  23143. function checkLeftSideAssign(left, assignToken, options) {
  23144. var allowDestructuring = options && options.allowDestructuring;
  23145. assignToken = assignToken || left;
  23146. if (state.option.freeze) {
  23147. var nativeObject = findNativePrototype(left);
  23148. if (nativeObject)
  23149. warning("W121", left, nativeObject);
  23150. }
  23151. if (checkPunctuator(left, "...")) {
  23152. left = left.right;
  23153. }
  23154. if (left.identifier && !left.isMetaProperty) {
  23155. // reassign also calls modify
  23156. // but we are specific in order to catch function re-assignment
  23157. // and globals re-assignment
  23158. state.funct["(scope)"].block.reassign(left.value, left);
  23159. }
  23160. if (left.id === ".") {
  23161. if (!left.left || left.left.value === "arguments" && !state.isStrict()) {
  23162. warning("W143", assignToken);
  23163. }
  23164. state.nameStack.set(state.tokens.prev);
  23165. return true;
  23166. } else if (left.id === "{" || left.id === "[") {
  23167. if (!allowDestructuring || !left.destructAssign) {
  23168. if (left.id === "{" || !left.left) {
  23169. warning("E031", assignToken);
  23170. } else if (left.left.value === "arguments" && !state.isStrict()) {
  23171. warning("W143", assignToken);
  23172. }
  23173. }
  23174. if (left.id === "[") {
  23175. state.nameStack.set(left.right);
  23176. }
  23177. return true;
  23178. } else if (left.identifier && !isReserved(left) && !left.isMetaProperty &&
  23179. left.value !== "eval" && left.value !== "arguments") {
  23180. if (state.funct["(scope)"].labeltype(left.value) === "exception") {
  23181. warning("W022", left);
  23182. }
  23183. state.nameStack.set(left);
  23184. return true;
  23185. }
  23186. error("E031", assignToken);
  23187. return false;
  23188. }
  23189. function assignop(s, f, p) {
  23190. var x = infix(s, typeof f === "function" ? f : function(left, that) {
  23191. that.left = left;
  23192. checkLeftSideAssign(left, that, { allowDestructuring: true });
  23193. that.right = expression(10);
  23194. return that;
  23195. }, p);
  23196. x.exps = true;
  23197. x.assign = true;
  23198. return x;
  23199. }
  23200. function bitwise(s, f, p) {
  23201. var x = symbol(s, p);
  23202. reserveName(x);
  23203. x.infix = true;
  23204. x.led = (typeof f === "function") ? f : function(left) {
  23205. if (state.option.bitwise) {
  23206. warning("W016", this, this.id);
  23207. }
  23208. this.left = left;
  23209. this.right = expression(p);
  23210. return this;
  23211. };
  23212. return x;
  23213. }
  23214. function bitwiseassignop(s) {
  23215. return assignop(s, function(left, that) {
  23216. if (state.option.bitwise) {
  23217. warning("W016", that, that.id);
  23218. }
  23219. checkLeftSideAssign(left, that);
  23220. that.right = expression(10);
  23221. return that;
  23222. }, 20);
  23223. }
  23224. function suffix(s) {
  23225. var x = symbol(s, 150);
  23226. x.led = function(left) {
  23227. // this = suffix e.g. "++" punctuator
  23228. // left = symbol operated e.g. "a" identifier or "a.b" punctuator
  23229. if (state.option.plusplus) {
  23230. warning("W016", this, this.id);
  23231. }
  23232. checkLeftSideAssign(left, this);
  23233. this.left = left;
  23234. return this;
  23235. };
  23236. return x;
  23237. }
  23238. // prop means that this identifier is that of an object property
  23239. function optionalidentifier(prop, preserve) {
  23240. if (!state.tokens.next.identifier) {
  23241. return;
  23242. }
  23243. if (!preserve) {
  23244. advance();
  23245. }
  23246. var curr = state.tokens.curr;
  23247. var val = state.tokens.curr.value;
  23248. if (!isReserved(curr)) {
  23249. return val;
  23250. }
  23251. if (prop) {
  23252. if (state.inES5()) {
  23253. return val;
  23254. }
  23255. }
  23256. warning("W024", state.tokens.curr, state.tokens.curr.id);
  23257. return val;
  23258. }
  23259. // prop means that this identifier is that of an object property
  23260. function identifier(prop) {
  23261. var i = optionalidentifier(prop, false);
  23262. if (i) {
  23263. return i;
  23264. }
  23265. // parameter destructuring with rest operator
  23266. if (state.tokens.next.value === "...") {
  23267. if (!state.inES6(true)) {
  23268. warning("W119", state.tokens.next, "spread/rest operator", "6");
  23269. }
  23270. advance();
  23271. if (checkPunctuator(state.tokens.next, "...")) {
  23272. warning("E024", state.tokens.next, "...");
  23273. while (checkPunctuator(state.tokens.next, "...")) {
  23274. advance();
  23275. }
  23276. }
  23277. if (!state.tokens.next.identifier) {
  23278. warning("E024", state.tokens.curr, state.tokens.next.id);
  23279. return;
  23280. }
  23281. return identifier(prop);
  23282. } else {
  23283. error("E030", state.tokens.next, state.tokens.next.value);
  23284. // The token should be consumed after a warning is issued so the parser
  23285. // can continue as though an identifier were found. The semicolon token
  23286. // should not be consumed in this way so that the parser interprets it as
  23287. // a statement delimeter;
  23288. if (state.tokens.next.id !== ";") {
  23289. advance();
  23290. }
  23291. }
  23292. }
  23293. function reachable(controlToken) {
  23294. var i = 0, t;
  23295. if (state.tokens.next.id !== ";" || controlToken.inBracelessBlock) {
  23296. return;
  23297. }
  23298. for (;;) {
  23299. do {
  23300. t = peek(i);
  23301. i += 1;
  23302. } while (t.id !== "(end)" && t.id === "(comment)");
  23303. if (t.reach) {
  23304. return;
  23305. }
  23306. if (t.id !== "(endline)") {
  23307. if (t.id === "function") {
  23308. if (state.option.latedef === true) {
  23309. warning("W026", t);
  23310. }
  23311. break;
  23312. }
  23313. warning("W027", t, t.value, controlToken.value);
  23314. break;
  23315. }
  23316. }
  23317. }
  23318. /**
  23319. * Consume the semicolon that delimits the statement currently being parsed,
  23320. * emitting relevant warnings/errors as appropriate.
  23321. *
  23322. * @param {token} stmt - token describing the statement under consideration
  23323. */
  23324. function parseFinalSemicolon(stmt) {
  23325. if (state.tokens.next.id !== ";") {
  23326. // don't complain about unclosed templates / strings
  23327. if (state.tokens.next.isUnclosed) return advance();
  23328. var sameLine = startLine(state.tokens.next) === state.tokens.curr.line &&
  23329. state.tokens.next.id !== "(end)";
  23330. var blockEnd = checkPunctuator(state.tokens.next, "}");
  23331. if (sameLine && !blockEnd && !(stmt.id === "do" && state.inES6(true))) {
  23332. errorAt("E058", state.tokens.curr.line, state.tokens.curr.character);
  23333. } else if (!state.option.asi) {
  23334. // If this is the last statement in a block that ends on
  23335. // the same line *and* option lastsemic is on, ignore the warning.
  23336. // Otherwise, complain about missing semicolon.
  23337. if (!(blockEnd && sameLine && state.option.lastsemic)) {
  23338. warningAt("W033", state.tokens.curr.line, state.tokens.curr.character);
  23339. }
  23340. }
  23341. } else {
  23342. advance(";");
  23343. }
  23344. }
  23345. function statement() {
  23346. var i = indent, r, t = state.tokens.next, hasOwnScope = false;
  23347. if (t.id === ";") {
  23348. advance(";");
  23349. return;
  23350. }
  23351. // Is this a labelled statement?
  23352. var res = isReserved(t);
  23353. // We're being more tolerant here: if someone uses
  23354. // a FutureReservedWord as a label, we warn but proceed
  23355. // anyway.
  23356. if (res && t.meta && t.meta.isFutureReservedWord && peek().id === ":") {
  23357. warning("W024", t, t.id);
  23358. res = false;
  23359. }
  23360. if (t.identifier && !res && peek().id === ":") {
  23361. advance();
  23362. advance(":");
  23363. hasOwnScope = true;
  23364. state.funct["(scope)"].stack();
  23365. state.funct["(scope)"].block.addBreakLabel(t.value, { token: state.tokens.curr });
  23366. if (!state.tokens.next.labelled && state.tokens.next.value !== "{") {
  23367. warning("W028", state.tokens.next, t.value, state.tokens.next.value);
  23368. }
  23369. t = state.tokens.next;
  23370. }
  23371. // Is it a lonely block?
  23372. if (t.id === "{") {
  23373. // Is it a switch case block?
  23374. //
  23375. // switch (foo) {
  23376. // case bar: { <= here.
  23377. // ...
  23378. // }
  23379. // }
  23380. var iscase = (state.funct["(verb)"] === "case" && state.tokens.curr.value === ":");
  23381. block(true, true, false, false, iscase);
  23382. if (hasOwnScope) {
  23383. state.funct["(scope)"].unstack();
  23384. }
  23385. return;
  23386. }
  23387. // Parse the statement.
  23388. r = expression(0, true);
  23389. if (r && !(r.identifier && r.value === "function") &&
  23390. !(r.type === "(punctuator)" && r.left &&
  23391. r.left.identifier && r.left.value === "function")) {
  23392. if (!state.isStrict() && state.stmtMissingStrict()) {
  23393. warning("E007");
  23394. }
  23395. }
  23396. // Look for the final semicolon.
  23397. if (!t.block) {
  23398. if (!state.option.expr && (!r || !r.exps)) {
  23399. warning("W030", state.tokens.curr);
  23400. } else if (state.option.nonew && r && r.left && r.id === "(" && r.left.id === "new") {
  23401. warning("W031", t);
  23402. }
  23403. parseFinalSemicolon(t);
  23404. }
  23405. // Restore the indentation.
  23406. indent = i;
  23407. if (hasOwnScope) {
  23408. state.funct["(scope)"].unstack();
  23409. }
  23410. return r;
  23411. }
  23412. function statements() {
  23413. var a = [], p;
  23414. while (!state.tokens.next.reach && state.tokens.next.id !== "(end)") {
  23415. if (state.tokens.next.id === ";") {
  23416. p = peek();
  23417. if (!p || (p.id !== "(" && p.id !== "[")) {
  23418. warning("W032");
  23419. }
  23420. advance(";");
  23421. } else {
  23422. a.push(statement());
  23423. }
  23424. }
  23425. return a;
  23426. }
  23427. /*
  23428. * read all directives
  23429. */
  23430. function directives() {
  23431. var current = state.tokens.next;
  23432. while (state.tokens.next.id === "(string)") {
  23433. var next = peekIgnoreEOL();
  23434. if (!isEndOfExpr(current, next)) {
  23435. break;
  23436. }
  23437. current = next;
  23438. advance();
  23439. var directive = state.tokens.curr.value;
  23440. if (state.directive[directive] ||
  23441. (directive === "use strict" && state.option.strict === "implied")) {
  23442. warning("W034", state.tokens.curr, directive);
  23443. }
  23444. // there's no directive negation, so always set to true
  23445. state.directive[directive] = true;
  23446. parseFinalSemicolon(current);
  23447. }
  23448. if (state.isStrict()) {
  23449. state.option.undef = true;
  23450. }
  23451. }
  23452. /*
  23453. * Parses a single block. A block is a sequence of statements wrapped in
  23454. * braces.
  23455. *
  23456. * ordinary - true for everything but function bodies and try blocks.
  23457. * stmt - true if block can be a single statement (e.g. in if/for/while).
  23458. * isfunc - true if block is a function body
  23459. * isfatarrow - true if its a body of a fat arrow function
  23460. * iscase - true if block is a switch case block
  23461. */
  23462. function block(ordinary, stmt, isfunc, isfatarrow, iscase) {
  23463. var a,
  23464. b = inblock,
  23465. old_indent = indent,
  23466. m,
  23467. t,
  23468. d;
  23469. inblock = ordinary;
  23470. t = state.tokens.next;
  23471. var metrics = state.funct["(metrics)"];
  23472. metrics.nestedBlockDepth += 1;
  23473. metrics.verifyMaxNestedBlockDepthPerFunction();
  23474. if (state.tokens.next.id === "{") {
  23475. advance("{");
  23476. // create a new block scope
  23477. state.funct["(scope)"].stack();
  23478. state.funct["(noblockscopedvar)"] = false;
  23479. if (state.tokens.next.id !== "}") {
  23480. indent += state.option.indent;
  23481. while (!ordinary && state.tokens.next.from > indent) {
  23482. indent += state.option.indent;
  23483. }
  23484. if (isfunc) {
  23485. m = {};
  23486. for (d in state.directive) {
  23487. m[d] = state.directive[d];
  23488. }
  23489. directives();
  23490. state.funct["(isStrict)"] = state.isStrict();
  23491. if (state.option.strict && state.funct["(context)"]["(global)"]) {
  23492. if (!m["use strict"] && !state.isStrict()) {
  23493. warning("E007");
  23494. }
  23495. }
  23496. }
  23497. a = statements();
  23498. metrics.statementCount += a.length;
  23499. indent -= state.option.indent;
  23500. } else if (isfunc) {
  23501. // Ensure property is set for functions with empty bodies.
  23502. state.funct["(isStrict)"] = state.isStrict();
  23503. }
  23504. advance("}", t);
  23505. if (isfunc) {
  23506. state.funct["(scope)"].validateParams(isfatarrow);
  23507. if (m) {
  23508. state.directive = m;
  23509. }
  23510. }
  23511. state.funct["(scope)"].unstack();
  23512. indent = old_indent;
  23513. } else if (!ordinary) {
  23514. if (isfunc) {
  23515. state.funct["(scope)"].stack();
  23516. if (stmt && !isfatarrow && !state.inMoz()) {
  23517. error("W118", state.tokens.curr, "function closure expressions");
  23518. }
  23519. if (isfatarrow) {
  23520. state.funct["(scope)"].validateParams(true);
  23521. }
  23522. expression(10);
  23523. if (state.option.strict && state.funct["(context)"]["(global)"]) {
  23524. if (!state.isStrict()) {
  23525. warning("E007");
  23526. }
  23527. }
  23528. state.funct["(scope)"].unstack();
  23529. } else {
  23530. error("E021", state.tokens.next, "{", state.tokens.next.value);
  23531. }
  23532. } else {
  23533. // check to avoid let declaration not within a block
  23534. // though is fine inside for loop initializer section
  23535. state.funct["(noblockscopedvar)"] = state.tokens.next.id !== "for";
  23536. state.funct["(scope)"].stack();
  23537. if (!stmt || state.option.curly) {
  23538. warning("W116", state.tokens.next, "{", state.tokens.next.value);
  23539. }
  23540. state.tokens.next.inBracelessBlock = true;
  23541. indent += state.option.indent;
  23542. // test indentation only if statement is in new line
  23543. a = [statement()];
  23544. indent -= state.option.indent;
  23545. state.funct["(scope)"].unstack();
  23546. delete state.funct["(noblockscopedvar)"];
  23547. }
  23548. // Don't clear and let it propagate out if it is "break", "return" or similar in switch case
  23549. switch (state.funct["(verb)"]) {
  23550. case "break":
  23551. case "continue":
  23552. case "return":
  23553. case "throw":
  23554. if (iscase) {
  23555. break;
  23556. }
  23557. /* falls through */
  23558. default:
  23559. state.funct["(verb)"] = null;
  23560. }
  23561. inblock = b;
  23562. if (ordinary && state.option.noempty && (!a || a.length === 0)) {
  23563. warning("W035", state.tokens.prev);
  23564. }
  23565. metrics.nestedBlockDepth -= 1;
  23566. return a;
  23567. }
  23568. function countMember(m) {
  23569. if (membersOnly && typeof membersOnly[m] !== "boolean") {
  23570. warning("W036", state.tokens.curr, m);
  23571. }
  23572. if (typeof member[m] === "number") {
  23573. member[m] += 1;
  23574. } else {
  23575. member[m] = 1;
  23576. }
  23577. }
  23578. // Build the syntax table by declaring the syntactic elements of the language.
  23579. type("(number)", function() {
  23580. return this;
  23581. });
  23582. type("(string)", function() {
  23583. return this;
  23584. });
  23585. state.syntax["(identifier)"] = {
  23586. type: "(identifier)",
  23587. lbp: 0,
  23588. identifier: true,
  23589. nud: function() {
  23590. var v = this.value;
  23591. // If this identifier is the lone parameter to a shorthand "fat arrow"
  23592. // function definition, i.e.
  23593. //
  23594. // x => x;
  23595. //
  23596. // ...it should not be considered as a variable in the current scope. It
  23597. // will be added to the scope of the new function when the next token is
  23598. // parsed, so it can be safely ignored for now.
  23599. if (state.tokens.next.id === "=>") {
  23600. return this;
  23601. }
  23602. if (!state.funct["(comparray)"].check(v)) {
  23603. state.funct["(scope)"].block.use(v, state.tokens.curr);
  23604. }
  23605. return this;
  23606. },
  23607. led: function() {
  23608. error("E033", state.tokens.next, state.tokens.next.value);
  23609. }
  23610. };
  23611. var baseTemplateSyntax = {
  23612. identifier: false,
  23613. template: true,
  23614. };
  23615. state.syntax["(template)"] = _.extend({
  23616. lbp: 155,
  23617. type: "(template)",
  23618. nud: doTemplateLiteral,
  23619. led: doTemplateLiteral,
  23620. noSubst: false
  23621. }, baseTemplateSyntax);
  23622. state.syntax["(template middle)"] = _.extend({
  23623. lbp: 0,
  23624. type: "(template middle)",
  23625. noSubst: false
  23626. }, baseTemplateSyntax);
  23627. state.syntax["(template tail)"] = _.extend({
  23628. lbp: 0,
  23629. type: "(template tail)",
  23630. tail: true,
  23631. noSubst: false
  23632. }, baseTemplateSyntax);
  23633. state.syntax["(no subst template)"] = _.extend({
  23634. lbp: 155,
  23635. type: "(template)",
  23636. nud: doTemplateLiteral,
  23637. led: doTemplateLiteral,
  23638. noSubst: true,
  23639. tail: true // mark as tail, since it's always the last component
  23640. }, baseTemplateSyntax);
  23641. type("(regexp)", function() {
  23642. return this;
  23643. });
  23644. // ECMAScript parser
  23645. delim("(endline)");
  23646. (function(x) {
  23647. x.line = x.from = 0;
  23648. })(delim("(begin)"));
  23649. delim("(end)").reach = true;
  23650. delim("(error)").reach = true;
  23651. delim("}").reach = true;
  23652. delim(")");
  23653. delim("]");
  23654. delim("\"").reach = true;
  23655. delim("'").reach = true;
  23656. delim(";");
  23657. delim(":").reach = true;
  23658. delim("#");
  23659. reserve("else");
  23660. reserve("case").reach = true;
  23661. reserve("catch");
  23662. reserve("default").reach = true;
  23663. reserve("finally");
  23664. reserve("true", function() { return this; });
  23665. reserve("false", function() { return this; });
  23666. reservevar("null");
  23667. reservevar("this", function(x) {
  23668. if (state.isStrict() && !isMethod() &&
  23669. !state.option.validthis && ((state.funct["(statement)"] &&
  23670. state.funct["(name)"].charAt(0) > "Z") || state.funct["(global)"])) {
  23671. warning("W040", x);
  23672. }
  23673. });
  23674. assignop("=", "assign", 20);
  23675. assignop("+=", "assignadd", 20);
  23676. assignop("-=", "assignsub", 20);
  23677. assignop("*=", "assignmult", 20);
  23678. assignop("/=", "assigndiv", 20).nud = function() {
  23679. error("E014");
  23680. };
  23681. assignop("%=", "assignmod", 20);
  23682. bitwiseassignop("&=");
  23683. bitwiseassignop("|=");
  23684. bitwiseassignop("^=");
  23685. bitwiseassignop("<<=");
  23686. bitwiseassignop(">>=");
  23687. bitwiseassignop(">>>=");
  23688. infix(",", function(left, that) {
  23689. var expr;
  23690. that.exprs = [left];
  23691. if (state.option.nocomma) {
  23692. warning("W127");
  23693. }
  23694. if (!parseComma({ peek: true })) {
  23695. return that;
  23696. }
  23697. while (true) {
  23698. if (!(expr = expression(10))) {
  23699. break;
  23700. }
  23701. that.exprs.push(expr);
  23702. if (state.tokens.next.value !== "," || !parseComma()) {
  23703. break;
  23704. }
  23705. }
  23706. return that;
  23707. }, 10, true);
  23708. infix("?", function(left, that) {
  23709. increaseComplexityCount();
  23710. that.left = left;
  23711. that.right = expression(10);
  23712. advance(":");
  23713. expression(10);
  23714. return that;
  23715. }, 30);
  23716. var orPrecendence = 40;
  23717. infix("||", function(left, that) {
  23718. increaseComplexityCount();
  23719. that.left = left;
  23720. that.right = expression(orPrecendence);
  23721. return that;
  23722. }, orPrecendence);
  23723. infix("&&", "and", 50);
  23724. bitwise("|", "bitor", 70);
  23725. bitwise("^", "bitxor", 80);
  23726. bitwise("&", "bitand", 90);
  23727. relation("==", function(left, right) {
  23728. var eqnull = state.option.eqnull &&
  23729. ((left && left.value) === "null" || (right && right.value) === "null");
  23730. switch (true) {
  23731. case !eqnull && state.option.eqeqeq:
  23732. this.from = this.character;
  23733. warning("W116", this, "===", "==");
  23734. break;
  23735. case isTypoTypeof(right, left, state):
  23736. warning("W122", this, right.value);
  23737. break;
  23738. case isTypoTypeof(left, right, state):
  23739. warning("W122", this, left.value);
  23740. break;
  23741. }
  23742. return this;
  23743. });
  23744. relation("===", function(left, right) {
  23745. if (isTypoTypeof(right, left, state)) {
  23746. warning("W122", this, right.value);
  23747. } else if (isTypoTypeof(left, right, state)) {
  23748. warning("W122", this, left.value);
  23749. }
  23750. return this;
  23751. });
  23752. relation("!=", function(left, right) {
  23753. var eqnull = state.option.eqnull &&
  23754. ((left && left.value) === "null" || (right && right.value) === "null");
  23755. if (!eqnull && state.option.eqeqeq) {
  23756. this.from = this.character;
  23757. warning("W116", this, "!==", "!=");
  23758. } else if (isTypoTypeof(right, left, state)) {
  23759. warning("W122", this, right.value);
  23760. } else if (isTypoTypeof(left, right, state)) {
  23761. warning("W122", this, left.value);
  23762. }
  23763. return this;
  23764. });
  23765. relation("!==", function(left, right) {
  23766. if (isTypoTypeof(right, left, state)) {
  23767. warning("W122", this, right.value);
  23768. } else if (isTypoTypeof(left, right, state)) {
  23769. warning("W122", this, left.value);
  23770. }
  23771. return this;
  23772. });
  23773. relation("<");
  23774. relation(">");
  23775. relation("<=");
  23776. relation(">=");
  23777. bitwise("<<", "shiftleft", 120);
  23778. bitwise(">>", "shiftright", 120);
  23779. bitwise(">>>", "shiftrightunsigned", 120);
  23780. infix("in", "in", 120);
  23781. infix("instanceof", function(left, token) {
  23782. var right;
  23783. var scope = state.funct["(scope)"];
  23784. token.left = left;
  23785. token.right = right = expression(120);
  23786. // This condition reflects a syntax error which will be reported by the
  23787. // `expression` function.
  23788. if (!right) {
  23789. return token;
  23790. }
  23791. if (right.id === "(number)" ||
  23792. right.id === "(string)" ||
  23793. right.value === "null" ||
  23794. (right.value === "undefined" && !scope.has("undefined")) ||
  23795. right.arity === "unary" ||
  23796. right.id === "{" ||
  23797. (right.id === "[" && !right.right) ||
  23798. right.id === "(regexp)" ||
  23799. (right.id === "(template)" && !right.tag)) {
  23800. error("E060");
  23801. }
  23802. if (right.id === "function") {
  23803. warning("W139");
  23804. }
  23805. return token;
  23806. }, 120);
  23807. infix("+", function(left, that) {
  23808. var right;
  23809. that.left = left;
  23810. that.right = right = expression(130);
  23811. if (left && right && left.id === "(string)" && right.id === "(string)") {
  23812. left.value += right.value;
  23813. left.character = right.character;
  23814. if (!state.option.scripturl && reg.javascriptURL.test(left.value)) {
  23815. warning("W050", left);
  23816. }
  23817. return left;
  23818. }
  23819. return that;
  23820. }, 130);
  23821. prefix("+", "num");
  23822. infix("-", "sub", 130);
  23823. prefix("-", "neg");
  23824. infix("*", "mult", 140);
  23825. infix("/", "div", 140);
  23826. infix("%", "mod", 140);
  23827. suffix("++");
  23828. prefix("++", "preinc");
  23829. state.syntax["++"].exps = true;
  23830. state.syntax["++"].ltBoundary = "before";
  23831. suffix("--");
  23832. prefix("--", "predec");
  23833. state.syntax["--"].exps = true;
  23834. state.syntax["--"].ltBoundary = "before";
  23835. prefix("delete", function() {
  23836. var p = expression(10);
  23837. if (!p) {
  23838. return this;
  23839. }
  23840. if (p.id !== "." && p.id !== "[") {
  23841. warning("W051");
  23842. }
  23843. this.first = p;
  23844. // The `delete` operator accepts unresolvable references when not in strict
  23845. // mode, so the operand may be undefined.
  23846. if (p.identifier && !state.isStrict()) {
  23847. p.forgiveUndef = true;
  23848. }
  23849. return this;
  23850. }).exps = true;
  23851. prefix("~", function() {
  23852. if (state.option.bitwise) {
  23853. warning("W016", this, "~");
  23854. }
  23855. this.arity = "unary";
  23856. this.right = expression(150);
  23857. return this;
  23858. });
  23859. prefix("...", function() {
  23860. if (!state.inES6(true)) {
  23861. warning("W119", this, "spread/rest operator", "6");
  23862. }
  23863. // TODO: Allow all AssignmentExpression
  23864. // once parsing permits.
  23865. //
  23866. // How to handle eg. number, boolean when the built-in
  23867. // prototype of may have an @@iterator definition?
  23868. //
  23869. // Number.prototype[Symbol.iterator] = function * () {
  23870. // yield this.valueOf();
  23871. // };
  23872. //
  23873. // var a = [ ...1 ];
  23874. // console.log(a); // [1];
  23875. //
  23876. // for (let n of [...10]) {
  23877. // console.log(n);
  23878. // }
  23879. // // 10
  23880. //
  23881. //
  23882. // Boolean.prototype[Symbol.iterator] = function * () {
  23883. // yield this.valueOf();
  23884. // };
  23885. //
  23886. // var a = [ ...true ];
  23887. // console.log(a); // [true];
  23888. //
  23889. // for (let n of [...false]) {
  23890. // console.log(n);
  23891. // }
  23892. // // false
  23893. //
  23894. if (!state.tokens.next.identifier &&
  23895. state.tokens.next.type !== "(string)" &&
  23896. !checkPunctuators(state.tokens.next, ["[", "("])) {
  23897. error("E030", state.tokens.next, state.tokens.next.value);
  23898. }
  23899. this.right = expression(150);
  23900. return this;
  23901. });
  23902. prefix("!", function() {
  23903. this.arity = "unary";
  23904. this.right = expression(150);
  23905. if (!this.right) { // '!' followed by nothing? Give up.
  23906. quit("E041", this);
  23907. }
  23908. if (bang[this.right.id] === true) {
  23909. warning("W018", this, "!");
  23910. }
  23911. return this;
  23912. });
  23913. prefix("typeof", (function() {
  23914. var p = expression(150);
  23915. this.first = this.right = p;
  23916. if (!p) { // 'typeof' followed by nothing? Give up.
  23917. quit("E041", this);
  23918. }
  23919. // The `typeof` operator accepts unresolvable references, so the operand
  23920. // may be undefined.
  23921. if (p.identifier) {
  23922. p.forgiveUndef = true;
  23923. }
  23924. return this;
  23925. }));
  23926. prefix("new", function() {
  23927. var mp = metaProperty("target", function() {
  23928. if (!state.inES6(true)) {
  23929. warning("W119", state.tokens.prev, "new.target", "6");
  23930. }
  23931. var inFunction, c = state.funct;
  23932. while (c) {
  23933. inFunction = !c["(global)"];
  23934. if (!c["(arrow)"]) { break; }
  23935. c = c["(context)"];
  23936. }
  23937. if (!inFunction) {
  23938. warning("W136", state.tokens.prev, "new.target");
  23939. }
  23940. });
  23941. if (mp) { return mp; }
  23942. var c = expression(155), i;
  23943. if (c && c.id !== "function") {
  23944. if (c.identifier) {
  23945. switch (c.value) {
  23946. case "Number":
  23947. case "String":
  23948. case "Boolean":
  23949. case "Math":
  23950. case "JSON":
  23951. warning("W053", state.tokens.prev, c.value);
  23952. break;
  23953. case "Symbol":
  23954. if (state.inES6()) {
  23955. warning("W053", state.tokens.prev, c.value);
  23956. }
  23957. break;
  23958. case "Function":
  23959. if (!state.option.evil) {
  23960. warning("W054");
  23961. }
  23962. break;
  23963. case "Date":
  23964. case "RegExp":
  23965. case "this":
  23966. break;
  23967. default:
  23968. if (c.id !== "function") {
  23969. i = c.value.substr(0, 1);
  23970. if (state.option.newcap && (i < "A" || i > "Z") &&
  23971. !state.funct["(scope)"].isPredefined(c.value)) {
  23972. warning("W055", state.tokens.curr);
  23973. }
  23974. }
  23975. }
  23976. } else {
  23977. if (c.id !== "." && c.id !== "[" && c.id !== "(") {
  23978. warning("W056", state.tokens.curr);
  23979. }
  23980. }
  23981. } else {
  23982. if (!state.option.supernew)
  23983. warning("W057", this);
  23984. }
  23985. if (state.tokens.next.id !== "(" && !state.option.supernew) {
  23986. warning("W058", state.tokens.curr, state.tokens.curr.value);
  23987. }
  23988. this.first = this.right = c;
  23989. return this;
  23990. });
  23991. state.syntax["new"].exps = true;
  23992. prefix("void").exps = true;
  23993. infix(".", function(left, that) {
  23994. var m = identifier(true);
  23995. if (typeof m === "string") {
  23996. countMember(m);
  23997. }
  23998. that.left = left;
  23999. that.right = m;
  24000. if (m && m === "hasOwnProperty" && state.tokens.next.value === "=") {
  24001. warning("W001");
  24002. }
  24003. if (left && left.value === "arguments" && (m === "callee" || m === "caller")) {
  24004. if (state.option.noarg)
  24005. warning("W059", left, m);
  24006. else if (state.isStrict())
  24007. error("E008");
  24008. } else if (!state.option.evil && left && left.value === "document" &&
  24009. (m === "write" || m === "writeln")) {
  24010. warning("W060", left);
  24011. }
  24012. if (!state.option.evil && (m === "eval" || m === "execScript")) {
  24013. if (isGlobalEval(left, state)) {
  24014. warning("W061");
  24015. }
  24016. }
  24017. return that;
  24018. }, 160, true);
  24019. infix("(", function(left, that) {
  24020. if (state.option.immed && left && !left.immed && left.id === "function") {
  24021. warning("W062");
  24022. }
  24023. if (state.option.asi && checkPunctuators(state.tokens.prev, [")", "]"]) &&
  24024. state.tokens.prev.line !== startLine(state.tokens.curr)) {
  24025. warning("W014", state.tokens.curr, state.tokens.curr.id);
  24026. }
  24027. var n = 0;
  24028. var p = [];
  24029. if (left) {
  24030. if (left.type === "(identifier)") {
  24031. if (left.value.match(/^[A-Z]([A-Z0-9_$]*[a-z][A-Za-z0-9_$]*)?$/)) {
  24032. if ("Array Number String Boolean Date Object Error Symbol".indexOf(left.value) === -1) {
  24033. if (left.value === "Math") {
  24034. warning("W063", left);
  24035. } else if (state.option.newcap) {
  24036. warning("W064", left);
  24037. }
  24038. }
  24039. }
  24040. }
  24041. }
  24042. if (state.tokens.next.id !== ")") {
  24043. for (;;) {
  24044. p[p.length] = expression(10);
  24045. n += 1;
  24046. if (state.tokens.next.id !== ",") {
  24047. break;
  24048. }
  24049. parseComma();
  24050. }
  24051. }
  24052. advance(")");
  24053. if (typeof left === "object") {
  24054. if (!state.inES5() && left.value === "parseInt" && n === 1) {
  24055. warning("W065", state.tokens.curr);
  24056. }
  24057. if (!state.option.evil) {
  24058. if (left.value === "eval" || left.value === "Function" ||
  24059. left.value === "execScript") {
  24060. warning("W061", left);
  24061. // This conditional expression was initially implemented with a typo
  24062. // which prevented the branch's execution in all cases. While
  24063. // enabling the code will produce behavior that is consistent with
  24064. // the other forms of code evaluation that follow, such a change is
  24065. // also technically incompatable with prior versions of JSHint (due
  24066. // to the fact that the behavior was never formally documented). This
  24067. // branch should be enabled as part of a major release.
  24068. //if (p[0] && p[0].id === "(string)") {
  24069. // addEvalCode(left, p[0]);
  24070. //}
  24071. } else if (p[0] && p[0].id === "(string)" &&
  24072. (left.value === "setTimeout" ||
  24073. left.value === "setInterval")) {
  24074. warning("W066", left);
  24075. addEvalCode(left, p[0]);
  24076. // window.setTimeout/setInterval
  24077. } else if (p[0] && p[0].id === "(string)" &&
  24078. left.value === "." &&
  24079. left.left.value === "window" &&
  24080. (left.right === "setTimeout" ||
  24081. left.right === "setInterval")) {
  24082. warning("W066", left);
  24083. addEvalCode(left, p[0]);
  24084. }
  24085. }
  24086. if (!left.identifier && left.id !== "." && left.id !== "[" && left.id !== "=>" &&
  24087. left.id !== "(" && left.id !== "&&" && left.id !== "||" && left.id !== "?" &&
  24088. !(state.inES6() && left["(name)"])) {
  24089. warning("W067", that);
  24090. }
  24091. }
  24092. that.left = left;
  24093. return that;
  24094. }, 155, true).exps = true;
  24095. prefix("(", function(rbp) {
  24096. var pn = state.tokens.next, pn1, i = -1;
  24097. var ret, triggerFnExpr, first, last;
  24098. var parens = 1;
  24099. var opening = state.tokens.curr;
  24100. var preceeding = state.tokens.prev;
  24101. var isNecessary = !state.option.singleGroups;
  24102. do {
  24103. if (pn.value === "(") {
  24104. parens += 1;
  24105. } else if (pn.value === ")") {
  24106. parens -= 1;
  24107. }
  24108. i += 1;
  24109. pn1 = pn;
  24110. pn = peek(i);
  24111. } while (!(parens === 0 && pn1.value === ")") && pn.type !== "(end)");
  24112. if (state.tokens.next.id === "function") {
  24113. triggerFnExpr = state.tokens.next.immed = true;
  24114. }
  24115. // If the balanced grouping operator is followed by a "fat arrow", the
  24116. // current token marks the beginning of a "fat arrow" function and parsing
  24117. // should proceed accordingly.
  24118. if (pn.value === "=>") {
  24119. return doFunction({ type: "arrow", parsedOpening: true });
  24120. }
  24121. var exprs = [];
  24122. if (state.tokens.next.id !== ")") {
  24123. for (;;) {
  24124. exprs.push(expression(10));
  24125. if (state.tokens.next.id !== ",") {
  24126. break;
  24127. }
  24128. if (state.option.nocomma) {
  24129. warning("W127");
  24130. }
  24131. parseComma();
  24132. }
  24133. }
  24134. advance(")", this);
  24135. if (state.option.immed && exprs[0] && exprs[0].id === "function") {
  24136. if (state.tokens.next.id !== "(" &&
  24137. state.tokens.next.id !== "." && state.tokens.next.id !== "[") {
  24138. warning("W068", this);
  24139. }
  24140. }
  24141. if (!exprs.length) {
  24142. return;
  24143. }
  24144. if (exprs.length > 1) {
  24145. ret = Object.create(state.syntax[","]);
  24146. ret.exprs = exprs;
  24147. first = exprs[0];
  24148. last = exprs[exprs.length - 1];
  24149. } else {
  24150. ret = first = last = exprs[0];
  24151. if (!isNecessary) {
  24152. isNecessary =
  24153. // Used to distinguish from an ExpressionStatement which may not
  24154. // begin with the `{` and `function` tokens
  24155. (opening.beginsStmt && (ret.id === "{" || triggerFnExpr || isFunctor(ret))) ||
  24156. // Used to signal that a function expression is being supplied to
  24157. // some other operator.
  24158. (triggerFnExpr &&
  24159. // For parenthesis wrapping a function expression to be considered
  24160. // necessary, the grouping operator should be the left-hand-side of
  24161. // some other operator--either within the parenthesis or directly
  24162. // following them.
  24163. (!isEndOfExpr() || state.tokens.prev.id !== "}")) ||
  24164. // Used to demarcate an arrow function as the left-hand side of some
  24165. // operator.
  24166. (isFunctor(ret) && !isEndOfExpr()) ||
  24167. // Used as the return value of a single-statement arrow function
  24168. (ret.id === "{" && preceeding.id === "=>") ||
  24169. // Used to delineate an integer number literal from a dereferencing
  24170. // punctuator (otherwise interpreted as a decimal point)
  24171. (ret.type === "(number)" &&
  24172. checkPunctuator(pn, ".") && /^\d+$/.test(ret.value)) ||
  24173. // Used to wrap object destructuring assignment
  24174. (opening.beginsStmt && ret.id === "=" && ret.left.id === "{");
  24175. }
  24176. }
  24177. if (ret) {
  24178. // The operator may be necessary to override the default binding power of
  24179. // neighboring operators (whenever there is an operator in use within the
  24180. // first expression *or* the current group contains multiple expressions)
  24181. if (!isNecessary && (isOperator(first) || ret.exprs)) {
  24182. isNecessary =
  24183. (rbp > first.lbp) ||
  24184. (rbp > 0 && rbp === first.lbp) ||
  24185. (!isEndOfExpr() && last.lbp < state.tokens.next.lbp);
  24186. }
  24187. if (!isNecessary) {
  24188. warning("W126", opening);
  24189. }
  24190. ret.paren = true;
  24191. }
  24192. return ret;
  24193. });
  24194. application("=>");
  24195. infix("[", function(left, that) {
  24196. var e, s, canUseDot;
  24197. if (state.option.asi && checkPunctuators(state.tokens.prev, [")", "]"]) &&
  24198. state.tokens.prev.line !== startLine(state.tokens.curr)) {
  24199. warning("W014", state.tokens.curr, state.tokens.curr.id);
  24200. }
  24201. e = expression(10);
  24202. if (e && e.type === "(string)") {
  24203. if (!state.option.evil && (e.value === "eval" || e.value === "execScript")) {
  24204. if (isGlobalEval(left, state)) {
  24205. warning("W061");
  24206. }
  24207. }
  24208. countMember(e.value);
  24209. if (!state.option.sub && reg.identifier.test(e.value)) {
  24210. s = state.syntax[e.value];
  24211. if (s) {
  24212. canUseDot = !isReserved(s);
  24213. } else {
  24214. // This branch exists to preserve legacy behavior with version 2.9.5
  24215. // and earlier. In those releases, `eval` and `arguments` were
  24216. // incorrectly interpreted as reserved keywords, so Member
  24217. // Expressions such as `object["eval"]` did not trigger warning W069.
  24218. //
  24219. // TODO: Remove in JSHint 3
  24220. canUseDot = e.value !== "eval" && e.value !== "arguments";
  24221. }
  24222. if (canUseDot) {
  24223. warning("W069", state.tokens.prev, e.value);
  24224. }
  24225. }
  24226. }
  24227. advance("]", that);
  24228. if (e && e.value === "hasOwnProperty" && state.tokens.next.value === "=") {
  24229. warning("W001");
  24230. }
  24231. that.left = left;
  24232. that.right = e;
  24233. return that;
  24234. }, 160, true);
  24235. function comprehensiveArrayExpression() {
  24236. var res = {};
  24237. res.exps = true;
  24238. state.funct["(comparray)"].stack();
  24239. // Handle reversed for expressions, used in spidermonkey
  24240. var reversed = false;
  24241. if (state.tokens.next.value !== "for") {
  24242. reversed = true;
  24243. if (!state.inMoz()) {
  24244. warning("W116", state.tokens.next, "for", state.tokens.next.value);
  24245. }
  24246. state.funct["(comparray)"].setState("use");
  24247. res.right = expression(10);
  24248. }
  24249. advance("for");
  24250. if (state.tokens.next.value === "each") {
  24251. advance("each");
  24252. if (!state.inMoz()) {
  24253. warning("W118", state.tokens.curr, "for each");
  24254. }
  24255. }
  24256. advance("(");
  24257. state.funct["(comparray)"].setState("define");
  24258. res.left = expression(130);
  24259. if (_.includes(["in", "of"], state.tokens.next.value)) {
  24260. advance();
  24261. } else {
  24262. error("E045", state.tokens.curr);
  24263. }
  24264. state.funct["(comparray)"].setState("generate");
  24265. expression(10);
  24266. advance(")");
  24267. if (state.tokens.next.value === "if") {
  24268. advance("if");
  24269. advance("(");
  24270. state.funct["(comparray)"].setState("filter");
  24271. expression(10);
  24272. advance(")");
  24273. }
  24274. if (!reversed) {
  24275. state.funct["(comparray)"].setState("use");
  24276. res.right = expression(10);
  24277. }
  24278. advance("]");
  24279. state.funct["(comparray)"].unstack();
  24280. return res;
  24281. }
  24282. prefix("[", function() {
  24283. var blocktype = lookupBlockType();
  24284. if (blocktype.isCompArray) {
  24285. if (!state.option.esnext && !state.inMoz()) {
  24286. warning("W118", state.tokens.curr, "array comprehension");
  24287. }
  24288. return comprehensiveArrayExpression();
  24289. } else if (blocktype.isDestAssign) {
  24290. this.destructAssign = destructuringPattern({ openingParsed: true, assignment: true });
  24291. return this;
  24292. }
  24293. var b = state.tokens.curr.line !== startLine(state.tokens.next);
  24294. this.first = [];
  24295. if (b) {
  24296. indent += state.option.indent;
  24297. if (state.tokens.next.from === indent + state.option.indent) {
  24298. indent += state.option.indent;
  24299. }
  24300. }
  24301. while (state.tokens.next.id !== "(end)") {
  24302. while (state.tokens.next.id === ",") {
  24303. if (!state.option.elision) {
  24304. if (!state.inES5()) {
  24305. // Maintain compat with old options --- ES5 mode without
  24306. // elision=true will warn once per comma
  24307. warning("W070");
  24308. } else {
  24309. warning("W128");
  24310. do {
  24311. advance(",");
  24312. } while (state.tokens.next.id === ",");
  24313. continue;
  24314. }
  24315. }
  24316. advance(",");
  24317. }
  24318. if (state.tokens.next.id === "]") {
  24319. break;
  24320. }
  24321. this.first.push(expression(10));
  24322. if (state.tokens.next.id === ",") {
  24323. parseComma({ allowTrailing: true });
  24324. if (state.tokens.next.id === "]" && !state.inES5()) {
  24325. warning("W070", state.tokens.curr);
  24326. break;
  24327. }
  24328. } else {
  24329. if (state.option.trailingcomma && state.inES5()) {
  24330. warningAt("W140", state.tokens.curr.line, state.tokens.curr.character);
  24331. }
  24332. break;
  24333. }
  24334. }
  24335. if (b) {
  24336. indent -= state.option.indent;
  24337. }
  24338. advance("]", this);
  24339. return this;
  24340. });
  24341. function isMethod() {
  24342. return state.funct["(statement)"] && state.funct["(statement)"].type === "class" ||
  24343. state.funct["(context)"] && state.funct["(context)"]["(verb)"] === "class";
  24344. }
  24345. function isPropertyName(token) {
  24346. return token.identifier || token.id === "(string)" || token.id === "(number)";
  24347. }
  24348. function propertyName(preserveOrToken) {
  24349. var id;
  24350. var preserve = true;
  24351. if (typeof preserveOrToken === "object") {
  24352. id = preserveOrToken;
  24353. } else {
  24354. preserve = preserveOrToken;
  24355. id = optionalidentifier(true, preserve);
  24356. }
  24357. if (!id) {
  24358. if (state.tokens.next.id === "(string)") {
  24359. id = state.tokens.next.value;
  24360. if (!preserve) {
  24361. advance();
  24362. }
  24363. } else if (state.tokens.next.id === "(number)") {
  24364. id = state.tokens.next.value.toString();
  24365. if (!preserve) {
  24366. advance();
  24367. }
  24368. }
  24369. } else if (typeof id === "object") {
  24370. if (id.id === "(string)" || id.id === "(identifier)") id = id.value;
  24371. else if (id.id === "(number)") id = id.value.toString();
  24372. }
  24373. if (id === "hasOwnProperty") {
  24374. warning("W001");
  24375. }
  24376. return id;
  24377. }
  24378. /**
  24379. * @param {Object} [options]
  24380. * @param {token} [options.loneArg] The argument to the function in cases
  24381. * where it was defined using the
  24382. * single-argument shorthand.
  24383. * @param {bool} [options.parsedOpening] Whether the opening parenthesis has
  24384. * already been parsed.
  24385. * @returns {{ arity: number, params: Array.<string>}}
  24386. */
  24387. function functionparams(options) {
  24388. var next;
  24389. var paramsIds = [];
  24390. var ident;
  24391. var tokens = [];
  24392. var t;
  24393. var pastDefault = false;
  24394. var pastRest = false;
  24395. var arity = 0;
  24396. var loneArg = options && options.loneArg;
  24397. if (loneArg && loneArg.identifier === true) {
  24398. state.funct["(scope)"].addParam(loneArg.value, loneArg);
  24399. return { arity: 1, params: [ loneArg.value ] };
  24400. }
  24401. next = state.tokens.next;
  24402. if (!options || !options.parsedOpening) {
  24403. advance("(");
  24404. }
  24405. if (state.tokens.next.id === ")") {
  24406. advance(")");
  24407. return;
  24408. }
  24409. function addParam(addParamArgs) {
  24410. state.funct["(scope)"].addParam.apply(state.funct["(scope)"], addParamArgs);
  24411. }
  24412. for (;;) {
  24413. arity++;
  24414. // are added to the param scope
  24415. var currentParams = [];
  24416. if (_.includes(["{", "["], state.tokens.next.id)) {
  24417. tokens = destructuringPattern();
  24418. for (t in tokens) {
  24419. t = tokens[t];
  24420. if (t.id) {
  24421. paramsIds.push(t.id);
  24422. currentParams.push([t.id, t.token]);
  24423. }
  24424. }
  24425. } else {
  24426. if (checkPunctuator(state.tokens.next, "...")) pastRest = true;
  24427. ident = identifier();
  24428. if (ident) {
  24429. paramsIds.push(ident);
  24430. currentParams.push([ident, state.tokens.curr]);
  24431. } else {
  24432. // Skip invalid parameter.
  24433. while (!checkPunctuators(state.tokens.next, [",", ")"])) advance();
  24434. }
  24435. }
  24436. // It is valid to have a regular argument after a default argument
  24437. // since undefined can be used for missing parameters. Still warn as it is
  24438. // a possible code smell.
  24439. if (pastDefault) {
  24440. if (state.tokens.next.id !== "=") {
  24441. error("W138", state.tokens.curr);
  24442. }
  24443. }
  24444. if (state.tokens.next.id === "=") {
  24445. if (!state.inES6()) {
  24446. warning("W119", state.tokens.next, "default parameters", "6");
  24447. }
  24448. if (pastRest) {
  24449. error("E062", state.tokens.next);
  24450. }
  24451. advance("=");
  24452. pastDefault = true;
  24453. expression(10);
  24454. }
  24455. // now we have evaluated the default expression, add the variable to the param scope
  24456. currentParams.forEach(addParam);
  24457. if (state.tokens.next.id === ",") {
  24458. if (pastRest) {
  24459. warning("W131", state.tokens.next);
  24460. }
  24461. parseComma();
  24462. } else {
  24463. advance(")", next);
  24464. return { arity: arity, params: paramsIds };
  24465. }
  24466. }
  24467. }
  24468. function functor(name, token, overwrites) {
  24469. var funct = {
  24470. "(name)" : name,
  24471. "(breakage)" : 0,
  24472. "(loopage)" : 0,
  24473. // The strictness of the function body is tracked via a dedicated
  24474. // property (as opposed to via the global `state` object) so that the
  24475. // value can be referenced after the body has been fully parsed (i.e.
  24476. // when validating the identifier used in function declarations and
  24477. // function expressions).
  24478. "(isStrict)" : "unknown",
  24479. "(global)" : false,
  24480. "(line)" : null,
  24481. "(character)" : null,
  24482. "(metrics)" : null,
  24483. "(statement)" : null,
  24484. "(context)" : null,
  24485. "(scope)" : null,
  24486. "(comparray)" : null,
  24487. "(generator)" : null,
  24488. "(arrow)" : null,
  24489. "(params)" : null
  24490. };
  24491. if (token) {
  24492. _.extend(funct, {
  24493. "(line)" : token.line,
  24494. "(character)": token.character,
  24495. "(metrics)" : createMetrics(token)
  24496. });
  24497. }
  24498. _.extend(funct, overwrites);
  24499. if (funct["(context)"]) {
  24500. funct["(scope)"] = funct["(context)"]["(scope)"];
  24501. funct["(comparray)"] = funct["(context)"]["(comparray)"];
  24502. }
  24503. return funct;
  24504. }
  24505. function isFunctor(token) {
  24506. return "(scope)" in token;
  24507. }
  24508. /**
  24509. * Determine if the parser has begun parsing executable code.
  24510. *
  24511. * @param {Token} funct - The current "functor" token
  24512. *
  24513. * @returns {boolean}
  24514. */
  24515. function hasParsedCode(funct) {
  24516. return funct["(global)"] && !funct["(verb)"];
  24517. }
  24518. /**
  24519. * This function is used as both a null-denotation method *and* a
  24520. * left-denotation method, meaning the first parameter is overloaded.
  24521. */
  24522. function doTemplateLiteral(leftOrRbp) {
  24523. // ASSERT: this.type === "(template)"
  24524. // jshint validthis: true
  24525. var ctx = this.context;
  24526. var noSubst = this.noSubst;
  24527. var depth = this.depth;
  24528. var left = typeof leftOrRbp === "number" ? null : leftOrRbp;
  24529. if (!noSubst) {
  24530. while (!end()) {
  24531. if (!state.tokens.next.template || state.tokens.next.depth > depth) {
  24532. expression(0); // should probably have different rbp?
  24533. } else {
  24534. // skip template start / middle
  24535. advance();
  24536. }
  24537. }
  24538. }
  24539. return {
  24540. id: "(template)",
  24541. type: "(template)",
  24542. tag: left
  24543. };
  24544. function end() {
  24545. if (state.tokens.curr.template && state.tokens.curr.tail &&
  24546. state.tokens.curr.context === ctx) return true;
  24547. var complete = (state.tokens.next.template && state.tokens.next.tail &&
  24548. state.tokens.next.context === ctx);
  24549. if (complete) advance();
  24550. return complete || state.tokens.next.isUnclosed;
  24551. }
  24552. }
  24553. /**
  24554. * @param {Object} [options]
  24555. * @param {string} [options.name] The identifier belonging to the function (if
  24556. * any)
  24557. * @param {token} [options.statement] The statement that triggered creation
  24558. * of the current function.
  24559. * @param {string} [options.type] If specified, either "generator" or "arrow"
  24560. * @param {token} [options.loneArg] The argument to the function in cases
  24561. * where it was defined using the
  24562. * single-argument shorthand
  24563. * @param {bool} [options.parsedOpening] Whether the opening parenthesis has
  24564. * already been parsed
  24565. * @param {string} [options.classExprBinding] Define a function with this
  24566. * identifier in the new function's
  24567. * scope, mimicking the bahavior of
  24568. * class expression names within
  24569. * the body of member functions.
  24570. */
  24571. function doFunction(options) {
  24572. var f, token, name, statement, classExprBinding, isGenerator, isArrow,
  24573. isMethod, ignoreLoopFunc;
  24574. var oldOption = state.option;
  24575. var oldIgnored = state.ignored;
  24576. if (options) {
  24577. name = options.name;
  24578. statement = options.statement;
  24579. classExprBinding = options.classExprBinding;
  24580. isGenerator = options.type === "generator";
  24581. isArrow = options.type === "arrow";
  24582. isMethod = options.isMethod;
  24583. ignoreLoopFunc = options.ignoreLoopFunc;
  24584. }
  24585. state.option = Object.create(state.option);
  24586. state.ignored = Object.create(state.ignored);
  24587. state.funct = functor(name || state.nameStack.infer(), state.tokens.next, {
  24588. "(statement)": statement,
  24589. "(context)": state.funct,
  24590. "(arrow)": isArrow,
  24591. "(method)": isMethod,
  24592. "(generator)": isGenerator
  24593. });
  24594. f = state.funct;
  24595. token = state.tokens.curr;
  24596. functions.push(state.funct);
  24597. // So that the function is available to itself and referencing itself is not
  24598. // seen as a closure, add the function name to a new scope, but do not
  24599. // test for unused (unused: false)
  24600. // it is a new block scope so that params can override it, it can be block scoped
  24601. // but declarations inside the function don't cause already declared error
  24602. state.funct["(scope)"].stack("functionouter");
  24603. var internallyAccessibleName = name || classExprBinding;
  24604. if (internallyAccessibleName) {
  24605. state.funct["(scope)"].block.add(internallyAccessibleName,
  24606. classExprBinding ? "class" : "function", state.tokens.curr, false);
  24607. }
  24608. if (!isArrow) {
  24609. state.funct["(scope)"].funct.add("arguments", "var", token, false);
  24610. }
  24611. // create the param scope (params added in functionparams)
  24612. state.funct["(scope)"].stack("functionparams");
  24613. var paramsInfo = functionparams(options);
  24614. if (paramsInfo) {
  24615. state.funct["(params)"] = paramsInfo.params;
  24616. state.funct["(metrics)"].arity = paramsInfo.arity;
  24617. state.funct["(metrics)"].verifyMaxParametersPerFunction();
  24618. } else {
  24619. state.funct["(metrics)"].arity = 0;
  24620. }
  24621. if (isArrow) {
  24622. if (!state.inES6(true)) {
  24623. warning("W119", state.tokens.curr, "arrow function syntax (=>)", "6");
  24624. }
  24625. if (!options.loneArg) {
  24626. advance("=>");
  24627. }
  24628. }
  24629. block(false, true, true, isArrow);
  24630. if (!state.option.noyield && isGenerator &&
  24631. state.funct["(generator)"] !== "yielded") {
  24632. warning("W124", state.tokens.curr);
  24633. }
  24634. state.funct["(metrics)"].verifyMaxStatementsPerFunction();
  24635. state.funct["(metrics)"].verifyMaxComplexityPerFunction();
  24636. state.funct["(unusedOption)"] = state.option.unused;
  24637. state.option = oldOption;
  24638. state.ignored = oldIgnored;
  24639. state.funct["(last)"] = state.tokens.curr.line;
  24640. state.funct["(lastcharacter)"] = state.tokens.curr.character;
  24641. // unstack the params scope
  24642. state.funct["(scope)"].unstack(); // also does usage and label checks
  24643. // unstack the function outer stack
  24644. state.funct["(scope)"].unstack();
  24645. state.funct = state.funct["(context)"];
  24646. if (!ignoreLoopFunc && !state.option.loopfunc && state.funct["(loopage)"]) {
  24647. // If the function we just parsed accesses any non-local variables
  24648. // trigger a warning. Otherwise, the function is safe even within
  24649. // a loop.
  24650. if (f["(outerMutables)"]) {
  24651. warning("W083", token, f["(outerMutables)"].join(", "));
  24652. }
  24653. }
  24654. return f;
  24655. }
  24656. function createMetrics(functionStartToken) {
  24657. return {
  24658. statementCount: 0,
  24659. nestedBlockDepth: -1,
  24660. ComplexityCount: 1,
  24661. arity: 0,
  24662. verifyMaxStatementsPerFunction: function() {
  24663. if (state.option.maxstatements &&
  24664. this.statementCount > state.option.maxstatements) {
  24665. warning("W071", functionStartToken, this.statementCount);
  24666. }
  24667. },
  24668. verifyMaxParametersPerFunction: function() {
  24669. if (_.isNumber(state.option.maxparams) &&
  24670. this.arity > state.option.maxparams) {
  24671. warning("W072", functionStartToken, this.arity);
  24672. }
  24673. },
  24674. verifyMaxNestedBlockDepthPerFunction: function() {
  24675. if (state.option.maxdepth &&
  24676. this.nestedBlockDepth > 0 &&
  24677. this.nestedBlockDepth === state.option.maxdepth + 1) {
  24678. warning("W073", null, this.nestedBlockDepth);
  24679. }
  24680. },
  24681. verifyMaxComplexityPerFunction: function() {
  24682. var max = state.option.maxcomplexity;
  24683. var cc = this.ComplexityCount;
  24684. if (max && cc > max) {
  24685. warning("W074", functionStartToken, cc);
  24686. }
  24687. }
  24688. };
  24689. }
  24690. function increaseComplexityCount() {
  24691. state.funct["(metrics)"].ComplexityCount += 1;
  24692. }
  24693. // Parse assignments that were found instead of conditionals.
  24694. // For example: if (a = 1) { ... }
  24695. function checkCondAssignment(expr) {
  24696. var id, paren;
  24697. if (expr) {
  24698. id = expr.id;
  24699. paren = expr.paren;
  24700. if (id === "," && (expr = expr.exprs[expr.exprs.length - 1])) {
  24701. id = expr.id;
  24702. paren = paren || expr.paren;
  24703. }
  24704. }
  24705. switch (id) {
  24706. case "=":
  24707. case "+=":
  24708. case "-=":
  24709. case "*=":
  24710. case "%=":
  24711. case "&=":
  24712. case "|=":
  24713. case "^=":
  24714. case "/=":
  24715. if (!paren && !state.option.boss) {
  24716. warning("W084");
  24717. }
  24718. }
  24719. }
  24720. /**
  24721. * @param {object} props Collection of property descriptors for a given
  24722. * object.
  24723. */
  24724. function checkProperties(props) {
  24725. // Check for lonely setters if in the ES5 mode.
  24726. if (state.inES5()) {
  24727. for (var name in props) {
  24728. if (props[name] && props[name].setterToken && !props[name].getterToken) {
  24729. warning("W078", props[name].setterToken);
  24730. }
  24731. }
  24732. }
  24733. }
  24734. function metaProperty(name, c) {
  24735. if (checkPunctuator(state.tokens.next, ".")) {
  24736. var left = state.tokens.curr.id;
  24737. advance(".");
  24738. var id = identifier();
  24739. state.tokens.curr.isMetaProperty = true;
  24740. if (name !== id) {
  24741. error("E057", state.tokens.prev, left, id);
  24742. } else {
  24743. c();
  24744. }
  24745. return state.tokens.curr;
  24746. }
  24747. }
  24748. (function(x) {
  24749. x.nud = function() {
  24750. var b, f, i, p, t, isGeneratorMethod = false, nextVal;
  24751. var props = Object.create(null); // All properties, including accessors
  24752. b = state.tokens.curr.line !== startLine(state.tokens.next);
  24753. if (b) {
  24754. indent += state.option.indent;
  24755. if (state.tokens.next.from === indent + state.option.indent) {
  24756. indent += state.option.indent;
  24757. }
  24758. }
  24759. var blocktype = lookupBlockType();
  24760. if (blocktype.isDestAssign) {
  24761. this.destructAssign = destructuringPattern({ openingParsed: true, assignment: true });
  24762. return this;
  24763. }
  24764. for (;;) {
  24765. if (state.tokens.next.id === "}") {
  24766. break;
  24767. }
  24768. nextVal = state.tokens.next.value;
  24769. if (state.tokens.next.identifier &&
  24770. (peekIgnoreEOL().id === "," || peekIgnoreEOL().id === "}")) {
  24771. if (!state.inES6()) {
  24772. warning("W104", state.tokens.next, "object short notation", "6");
  24773. }
  24774. i = propertyName(true);
  24775. saveProperty(props, i, state.tokens.next);
  24776. expression(10);
  24777. } else if (peek().id !== ":" && (nextVal === "get" || nextVal === "set")) {
  24778. advance(nextVal);
  24779. if (!state.inES5()) {
  24780. error("E034");
  24781. }
  24782. if (state.tokens.next.id === "[") {
  24783. i = computedPropertyName();
  24784. } else {
  24785. i = propertyName();
  24786. // ES6 allows for get() {...} and set() {...} method
  24787. // definition shorthand syntax, so we don't produce an error
  24788. // if linting ECMAScript 6 code.
  24789. if (!i && !state.inES6()) {
  24790. error("E035");
  24791. }
  24792. }
  24793. // We don't want to save this getter unless it's an actual getter
  24794. // and not an ES6 concise method
  24795. if (i) {
  24796. saveAccessor(nextVal, props, i, state.tokens.curr);
  24797. }
  24798. t = state.tokens.next;
  24799. f = doFunction({ isMethod: true });
  24800. p = f["(params)"];
  24801. // Don't warn about getter/setter pairs if this is an ES6 concise method
  24802. if (nextVal === "get" && i && p) {
  24803. warning("W076", t, p[0], i);
  24804. } else if (nextVal === "set" && i && f["(metrics)"].arity !== 1) {
  24805. warning("W077", t, i);
  24806. }
  24807. } else {
  24808. if (state.tokens.next.value === "*" && state.tokens.next.type === "(punctuator)") {
  24809. if (!state.inES6()) {
  24810. warning("W104", state.tokens.next, "generator functions", "6");
  24811. }
  24812. advance("*");
  24813. isGeneratorMethod = true;
  24814. } else {
  24815. isGeneratorMethod = false;
  24816. }
  24817. if (state.tokens.next.id === "[") {
  24818. i = computedPropertyName();
  24819. state.nameStack.set(i);
  24820. } else {
  24821. state.nameStack.set(state.tokens.next);
  24822. i = propertyName();
  24823. saveProperty(props, i, state.tokens.next);
  24824. if (typeof i !== "string") {
  24825. break;
  24826. }
  24827. }
  24828. if (state.tokens.next.value === "(") {
  24829. if (!state.inES6()) {
  24830. warning("W104", state.tokens.curr, "concise methods", "6");
  24831. }
  24832. doFunction({
  24833. isMethod: true,
  24834. type: isGeneratorMethod ? "generator" : null
  24835. });
  24836. } else {
  24837. advance(":");
  24838. expression(10);
  24839. }
  24840. }
  24841. countMember(i);
  24842. if (state.tokens.next.id === ",") {
  24843. parseComma({ allowTrailing: true, property: true });
  24844. if (state.tokens.next.id === ",") {
  24845. warning("W070", state.tokens.curr);
  24846. } else if (state.tokens.next.id === "}" && !state.inES5()) {
  24847. warning("W070", state.tokens.curr);
  24848. }
  24849. } else {
  24850. if (state.option.trailingcomma && state.inES5()) {
  24851. warningAt("W140", state.tokens.curr.line, state.tokens.curr.character);
  24852. }
  24853. break;
  24854. }
  24855. }
  24856. if (b) {
  24857. indent -= state.option.indent;
  24858. }
  24859. advance("}", this);
  24860. checkProperties(props);
  24861. return this;
  24862. };
  24863. x.fud = function() {
  24864. error("E036", state.tokens.curr);
  24865. };
  24866. }(delim("{")));
  24867. function destructuringPattern(options) {
  24868. var isAssignment = options && options.assignment;
  24869. if (!state.inES6()) {
  24870. warning("W104", state.tokens.curr,
  24871. isAssignment ? "destructuring assignment" : "destructuring binding", "6");
  24872. }
  24873. return destructuringPatternRecursive(options);
  24874. }
  24875. function destructuringPatternRecursive(options) {
  24876. var ids, idx;
  24877. var identifiers = [];
  24878. var openingParsed = options && options.openingParsed;
  24879. var isAssignment = options && options.assignment;
  24880. var recursiveOptions = isAssignment ? { assignment: isAssignment } : null;
  24881. var firstToken = openingParsed ? state.tokens.curr : state.tokens.next;
  24882. var nextInnerDE = function() {
  24883. var ident;
  24884. if (checkPunctuators(state.tokens.next, ["[", "{"])) {
  24885. ids = destructuringPatternRecursive(recursiveOptions);
  24886. for (idx = 0; idx < ids.length; idx++) {
  24887. identifiers.push({ id: ids[idx].id, token: ids[idx].token });
  24888. }
  24889. } else if (checkPunctuator(state.tokens.next, ",")) {
  24890. identifiers.push({ id: null, token: state.tokens.curr });
  24891. } else if (checkPunctuator(state.tokens.next, "(")) {
  24892. advance("(");
  24893. nextInnerDE();
  24894. advance(")");
  24895. } else {
  24896. var is_rest = checkPunctuator(state.tokens.next, "...");
  24897. if (isAssignment) {
  24898. var assignTarget = expression(20);
  24899. if (assignTarget) {
  24900. checkLeftSideAssign(assignTarget);
  24901. // if the target was a simple identifier, add it to the list to return
  24902. if (assignTarget.identifier) {
  24903. ident = assignTarget.value;
  24904. }
  24905. }
  24906. } else {
  24907. ident = identifier();
  24908. }
  24909. if (ident) {
  24910. identifiers.push({ id: ident, token: state.tokens.curr });
  24911. }
  24912. return is_rest;
  24913. }
  24914. return false;
  24915. };
  24916. var assignmentProperty = function() {
  24917. var id;
  24918. if (checkPunctuator(state.tokens.next, "[")) {
  24919. advance("[");
  24920. expression(10);
  24921. advance("]");
  24922. advance(":");
  24923. nextInnerDE();
  24924. } else if (state.tokens.next.id === "(string)" ||
  24925. state.tokens.next.id === "(number)") {
  24926. advance();
  24927. advance(":");
  24928. nextInnerDE();
  24929. } else {
  24930. // this id will either be the property name or the property name and the assigning identifier
  24931. id = identifier();
  24932. if (checkPunctuator(state.tokens.next, ":")) {
  24933. advance(":");
  24934. nextInnerDE();
  24935. } else if (id) {
  24936. // in this case we are assigning (not declaring), so check assignment
  24937. if (isAssignment) {
  24938. checkLeftSideAssign(state.tokens.curr);
  24939. }
  24940. identifiers.push({ id: id, token: state.tokens.curr });
  24941. }
  24942. }
  24943. };
  24944. var id, value;
  24945. if (checkPunctuator(firstToken, "[")) {
  24946. if (!openingParsed) {
  24947. advance("[");
  24948. }
  24949. if (checkPunctuator(state.tokens.next, "]")) {
  24950. warning("W137", state.tokens.curr);
  24951. }
  24952. var element_after_rest = false;
  24953. while (!checkPunctuator(state.tokens.next, "]")) {
  24954. if (nextInnerDE() && !element_after_rest &&
  24955. checkPunctuator(state.tokens.next, ",")) {
  24956. warning("W130", state.tokens.next);
  24957. element_after_rest = true;
  24958. }
  24959. if (checkPunctuator(state.tokens.next, "=")) {
  24960. if (checkPunctuator(state.tokens.prev, "...")) {
  24961. advance("]");
  24962. } else {
  24963. advance("=");
  24964. }
  24965. id = state.tokens.prev;
  24966. value = expression(10);
  24967. if (value && value.identifier && value.value === "undefined") {
  24968. warning("W080", id, id.value);
  24969. }
  24970. }
  24971. if (!checkPunctuator(state.tokens.next, "]")) {
  24972. advance(",");
  24973. }
  24974. }
  24975. advance("]");
  24976. } else if (checkPunctuator(firstToken, "{")) {
  24977. if (!openingParsed) {
  24978. advance("{");
  24979. }
  24980. if (checkPunctuator(state.tokens.next, "}")) {
  24981. warning("W137", state.tokens.curr);
  24982. }
  24983. while (!checkPunctuator(state.tokens.next, "}")) {
  24984. assignmentProperty();
  24985. if (checkPunctuator(state.tokens.next, "=")) {
  24986. advance("=");
  24987. id = state.tokens.prev;
  24988. value = expression(10);
  24989. if (value && value.identifier && value.value === "undefined") {
  24990. warning("W080", id, id.value);
  24991. }
  24992. }
  24993. if (!checkPunctuator(state.tokens.next, "}")) {
  24994. advance(",");
  24995. if (checkPunctuator(state.tokens.next, "}")) {
  24996. // Trailing comma
  24997. // ObjectBindingPattern: { BindingPropertyList , }
  24998. break;
  24999. }
  25000. }
  25001. }
  25002. advance("}");
  25003. }
  25004. return identifiers;
  25005. }
  25006. function destructuringPatternMatch(tokens, value) {
  25007. var first = value.first;
  25008. if (!first)
  25009. return;
  25010. _.zip(tokens, Array.isArray(first) ? first : [ first ]).forEach(function(val) {
  25011. var token = val[0];
  25012. var value = val[1];
  25013. if (token && value)
  25014. token.first = value;
  25015. else if (token && token.first && !value)
  25016. warning("W080", token.first, token.first.value);
  25017. });
  25018. }
  25019. function blockVariableStatement(type, statement, context) {
  25020. // used for both let and const statements
  25021. var prefix = context && context.prefix;
  25022. var inexport = context && context.inexport;
  25023. var isLet = type === "let";
  25024. var isConst = type === "const";
  25025. var tokens, lone, value, letblock;
  25026. if (!state.inES6()) {
  25027. warning("W104", state.tokens.curr, type, "6");
  25028. }
  25029. if (isLet && state.tokens.next.value === "(") {
  25030. if (!state.inMoz()) {
  25031. warning("W118", state.tokens.next, "let block");
  25032. }
  25033. advance("(");
  25034. state.funct["(scope)"].stack();
  25035. letblock = true;
  25036. } else if (state.funct["(noblockscopedvar)"]) {
  25037. error("E048", state.tokens.curr, isConst ? "Const" : "Let");
  25038. }
  25039. statement.first = [];
  25040. for (;;) {
  25041. var names = [];
  25042. if (_.includes(["{", "["], state.tokens.next.value)) {
  25043. tokens = destructuringPattern();
  25044. lone = false;
  25045. } else {
  25046. tokens = [ { id: identifier(), token: state.tokens.curr } ];
  25047. lone = true;
  25048. }
  25049. if (!prefix && isConst && state.tokens.next.id !== "=") {
  25050. warning("E012", state.tokens.curr, state.tokens.curr.value);
  25051. }
  25052. for (var t in tokens) {
  25053. if (tokens.hasOwnProperty(t)) {
  25054. t = tokens[t];
  25055. if (state.funct["(scope)"].block.isGlobal()) {
  25056. if (predefined[t.id] === false) {
  25057. warning("W079", t.token, t.id);
  25058. }
  25059. }
  25060. if (t.id && !state.funct["(noblockscopedvar)"]) {
  25061. state.funct["(scope)"].addlabel(t.id, {
  25062. type: type,
  25063. token: t.token });
  25064. names.push(t.token);
  25065. }
  25066. }
  25067. }
  25068. if (state.tokens.next.id === "=") {
  25069. advance("=");
  25070. if (!prefix && peek(0).id === "=" && state.tokens.next.identifier) {
  25071. warning("W120", state.tokens.next, state.tokens.next.value);
  25072. }
  25073. var id = state.tokens.prev;
  25074. // don't accept `in` in expression if prefix is used for ForIn/Of loop.
  25075. value = expression(prefix ? 120 : 10);
  25076. if (!prefix && value && value.identifier && value.value === "undefined") {
  25077. warning("W080", id, id.value);
  25078. }
  25079. if (!lone) {
  25080. destructuringPatternMatch(names, value);
  25081. }
  25082. }
  25083. if (!prefix) {
  25084. for (t in tokens) {
  25085. if (tokens.hasOwnProperty(t)) {
  25086. t = tokens[t];
  25087. state.funct["(scope)"].initialize(t.id);
  25088. if (lone && inexport) {
  25089. state.funct["(scope)"].setExported(t.token.value, t.token);
  25090. }
  25091. }
  25092. }
  25093. }
  25094. statement.first = statement.first.concat(names);
  25095. if (state.tokens.next.id !== ",") {
  25096. break;
  25097. }
  25098. parseComma();
  25099. }
  25100. if (letblock) {
  25101. advance(")");
  25102. block(true, true);
  25103. statement.block = true;
  25104. state.funct["(scope)"].unstack();
  25105. }
  25106. return statement;
  25107. }
  25108. var conststatement = stmt("const", function(context) {
  25109. return blockVariableStatement("const", this, context);
  25110. });
  25111. conststatement.exps = true;
  25112. var letstatement = stmt("let", function(context) {
  25113. return blockVariableStatement("let", this, context);
  25114. });
  25115. letstatement.exps = true;
  25116. var varstatement = stmt("var", function(context) {
  25117. var prefix = context && context.prefix;
  25118. var inexport = context && context.inexport;
  25119. var tokens, lone, value, id;
  25120. this.first = [];
  25121. for (;;) {
  25122. var names = [];
  25123. if (_.includes(["{", "["], state.tokens.next.value)) {
  25124. tokens = destructuringPattern();
  25125. lone = false;
  25126. } else {
  25127. tokens = [];
  25128. id = identifier();
  25129. if (id) {
  25130. tokens.push({ id: id, token: state.tokens.curr });
  25131. }
  25132. lone = true;
  25133. }
  25134. if (state.option.varstmt) {
  25135. warning("W132", this);
  25136. }
  25137. this.first = this.first.concat(names);
  25138. for (var t in tokens) {
  25139. if (tokens.hasOwnProperty(t)) {
  25140. t = tokens[t];
  25141. if (state.funct["(global)"] && !state.impliedClosure()) {
  25142. if (predefined[t.id] === false) {
  25143. warning("W079", t.token, t.id);
  25144. } else if (state.option.futurehostile === false) {
  25145. if ((!state.inES5() && vars.ecmaIdentifiers[5][t.id] === false) ||
  25146. (!state.inES6() && vars.ecmaIdentifiers[6][t.id] === false)) {
  25147. warning("W129", t.token, t.id);
  25148. }
  25149. }
  25150. }
  25151. if (t.id) {
  25152. state.funct["(scope)"].addlabel(t.id, {
  25153. type: "var",
  25154. token: t.token });
  25155. if (lone && inexport) {
  25156. state.funct["(scope)"].setExported(t.id, t.token);
  25157. }
  25158. names.push(t.token);
  25159. }
  25160. }
  25161. }
  25162. if (state.tokens.next.id === "=") {
  25163. state.nameStack.set(state.tokens.curr);
  25164. advance("=");
  25165. if (peek(0).id === "=" && state.tokens.next.identifier) {
  25166. if (!prefix &&
  25167. !state.funct["(params)"] ||
  25168. state.funct["(params)"].indexOf(state.tokens.next.value) === -1) {
  25169. warning("W120", state.tokens.next, state.tokens.next.value);
  25170. }
  25171. }
  25172. id = state.tokens.prev;
  25173. // don't accept `in` in expression if prefix is used for ForIn/Of loop.
  25174. value = expression(prefix ? 120 : 10);
  25175. if (value && !prefix && !state.funct["(loopage)"] &&
  25176. value.identifier && value.value === "undefined") {
  25177. warning("W080", id, id.value);
  25178. }
  25179. if (!lone) {
  25180. destructuringPatternMatch(names, value);
  25181. }
  25182. }
  25183. if (state.tokens.next.id !== ",") {
  25184. break;
  25185. }
  25186. parseComma();
  25187. }
  25188. return this;
  25189. });
  25190. varstatement.exps = true;
  25191. blockstmt("class", function(rbp) {
  25192. return classdef.call(this, rbp, true);
  25193. });
  25194. function classdef(rbp, isStatement) {
  25195. /*jshint validthis:true */
  25196. var wasInClassBody = state.inClassBody;
  25197. state.inClassBody = true;
  25198. if (!state.inES6()) {
  25199. warning("W104", state.tokens.curr, "class", "6");
  25200. }
  25201. if (isStatement) {
  25202. // BindingIdentifier
  25203. this.name = identifier();
  25204. state.funct["(scope)"].addlabel(this.name, {
  25205. type: "class",
  25206. token: state.tokens.curr });
  25207. } else if (state.tokens.next.identifier && state.tokens.next.value !== "extends") {
  25208. // BindingIdentifier(opt)
  25209. this.name = identifier();
  25210. this.namedExpr = true;
  25211. } else {
  25212. this.name = state.nameStack.infer();
  25213. }
  25214. classtail(this);
  25215. state.inClassBody = wasInClassBody;
  25216. if (isStatement) {
  25217. state.funct["(scope)"].initialize(this.name);
  25218. }
  25219. return this;
  25220. }
  25221. function classtail(c) {
  25222. // ClassHeritage(opt)
  25223. if (state.tokens.next.value === "extends") {
  25224. advance("extends");
  25225. expression(10);
  25226. }
  25227. advance("{");
  25228. // ClassBody(opt)
  25229. classbody(c);
  25230. advance("}");
  25231. }
  25232. function classbody(c) {
  25233. var name;
  25234. var isStatic;
  25235. var isGenerator;
  25236. var getset;
  25237. var props = Object.create(null);
  25238. var staticProps = Object.create(null);
  25239. var computed;
  25240. while (state.tokens.next.id !== "}") {
  25241. name = state.tokens.next;
  25242. isStatic = false;
  25243. isGenerator = false;
  25244. getset = null;
  25245. // The ES6 grammar for ClassElement includes the `;` token, but it is
  25246. // defined only as a placeholder to facilitate future language
  25247. // extensions. In ES6 code, it serves no purpose.
  25248. if (name.id === ";") {
  25249. warning("W032");
  25250. advance(";");
  25251. continue;
  25252. }
  25253. if (name.id === "*") {
  25254. isGenerator = true;
  25255. advance("*");
  25256. name = state.tokens.next;
  25257. }
  25258. if (name.id === "[") {
  25259. name = computedPropertyName();
  25260. computed = true;
  25261. } else if (isPropertyName(name)) {
  25262. // Non-Computed PropertyName
  25263. advance();
  25264. computed = false;
  25265. if (name.identifier && name.value === "static") {
  25266. if (checkPunctuator(state.tokens.next, "*")) {
  25267. isGenerator = true;
  25268. advance("*");
  25269. }
  25270. if (isPropertyName(state.tokens.next) || state.tokens.next.id === "[") {
  25271. computed = state.tokens.next.id === "[";
  25272. isStatic = true;
  25273. name = state.tokens.next;
  25274. if (state.tokens.next.id === "[") {
  25275. name = computedPropertyName();
  25276. } else advance();
  25277. }
  25278. }
  25279. if (name.identifier && (name.value === "get" || name.value === "set")) {
  25280. if (isPropertyName(state.tokens.next) || state.tokens.next.id === "[") {
  25281. computed = state.tokens.next.id === "[";
  25282. getset = name;
  25283. name = state.tokens.next;
  25284. if (state.tokens.next.id === "[") {
  25285. name = computedPropertyName();
  25286. } else advance();
  25287. }
  25288. }
  25289. } else {
  25290. warning("W052", state.tokens.next, state.tokens.next.value || state.tokens.next.type);
  25291. advance();
  25292. continue;
  25293. }
  25294. if (!checkPunctuator(state.tokens.next, "(")) {
  25295. // error --- class properties must be methods
  25296. error("E054", state.tokens.next, state.tokens.next.value);
  25297. while (state.tokens.next.id !== "}" &&
  25298. !checkPunctuator(state.tokens.next, "(")) {
  25299. advance();
  25300. }
  25301. if (state.tokens.next.value !== "(") {
  25302. doFunction({
  25303. isMethod: true,
  25304. statement: c
  25305. });
  25306. }
  25307. }
  25308. if (!computed) {
  25309. // We don't know how to determine if we have duplicate computed property names :(
  25310. if (getset) {
  25311. saveAccessor(
  25312. getset.value, isStatic ? staticProps : props, name.value, name, true, isStatic);
  25313. } else {
  25314. if (name.value === "constructor") {
  25315. state.nameStack.set(c);
  25316. } else {
  25317. state.nameStack.set(name);
  25318. }
  25319. saveProperty(isStatic ? staticProps : props, name.value, name, true, isStatic);
  25320. }
  25321. }
  25322. if (getset && name.value === "constructor") {
  25323. var propDesc = getset.value === "get" ? "class getter method" : "class setter method";
  25324. error("E049", name, propDesc, "constructor");
  25325. } else if (name.value === "prototype") {
  25326. error("E049", name, "class method", "prototype");
  25327. }
  25328. propertyName(name);
  25329. doFunction({
  25330. statement: c,
  25331. isMethod: true,
  25332. type: isGenerator ? "generator" : null,
  25333. classExprBinding: c.namedExpr ? c.name : null
  25334. });
  25335. }
  25336. checkProperties(props);
  25337. }
  25338. blockstmt("function", function(context) {
  25339. var inexport = context && context.inexport;
  25340. var generator = false;
  25341. if (state.tokens.next.value === "*") {
  25342. advance("*");
  25343. if (state.inES6(true)) {
  25344. generator = true;
  25345. } else {
  25346. warning("W119", state.tokens.curr, "function*", "6");
  25347. }
  25348. }
  25349. if (inblock) {
  25350. warning("W082", state.tokens.curr);
  25351. }
  25352. var nameToken = optionalidentifier() ? state.tokens.curr : null;
  25353. if (!nameToken) {
  25354. warning("W025");
  25355. } else {
  25356. state.funct["(scope)"].addlabel(nameToken.value, {
  25357. type: generator ? "generator function" : "function",
  25358. token: state.tokens.curr,
  25359. initialized: true });
  25360. if (inexport) {
  25361. state.funct["(scope)"].setExported(nameToken.value, state.tokens.prev);
  25362. }
  25363. }
  25364. var f = doFunction({
  25365. name: nameToken && nameToken.value,
  25366. statement: this,
  25367. type: generator ? "generator" : null,
  25368. ignoreLoopFunc: inblock // a declaration may already have warned
  25369. });
  25370. // If the function declaration is strict because the surrounding code is
  25371. // strict, the invalid name will trigger E008 when the scope manager
  25372. // attempts to create a binding in the strict environment record. An error
  25373. // should only be signaled here when the function itself enables strict
  25374. // mode (the scope manager will not report an error because a declaration
  25375. // does not introduce a binding into the function's environment record).
  25376. var enablesStrictMode = f["(isStrict)"] && !state.isStrict();
  25377. if (nameToken && (f["(name)"] === "arguments" || f["(name)"] === "eval") &&
  25378. enablesStrictMode) {
  25379. error("E008", nameToken);
  25380. }
  25381. if (state.tokens.next.id === "(" && state.tokens.next.line === state.tokens.curr.line) {
  25382. error("E039");
  25383. }
  25384. return this;
  25385. });
  25386. prefix("function", function() {
  25387. var generator = false;
  25388. if (state.tokens.next.value === "*") {
  25389. if (!state.inES6()) {
  25390. warning("W119", state.tokens.curr, "function*", "6");
  25391. }
  25392. advance("*");
  25393. generator = true;
  25394. }
  25395. var nameToken = optionalidentifier() ? state.tokens.curr : null;
  25396. var f = doFunction({
  25397. name: nameToken && nameToken.value,
  25398. type: generator ? "generator" : null
  25399. });
  25400. if (nameToken && (f["(name)"] === "arguments" || f["(name)"] === "eval") &&
  25401. f["(isStrict)"]) {
  25402. error("E008", nameToken);
  25403. }
  25404. return this;
  25405. });
  25406. blockstmt("if", function() {
  25407. var t = state.tokens.next;
  25408. increaseComplexityCount();
  25409. state.condition = true;
  25410. advance("(");
  25411. var expr = expression(0);
  25412. if (!expr) {
  25413. quit("E041", this);
  25414. }
  25415. checkCondAssignment(expr);
  25416. // When the if is within a for-in loop, check if the condition
  25417. // starts with a negation operator
  25418. var forinifcheck = null;
  25419. if (state.option.forin && state.forinifcheckneeded) {
  25420. state.forinifcheckneeded = false; // We only need to analyze the first if inside the loop
  25421. forinifcheck = state.forinifchecks[state.forinifchecks.length - 1];
  25422. if (expr.type === "(punctuator)" && expr.value === "!") {
  25423. forinifcheck.type = "(negative)";
  25424. } else {
  25425. forinifcheck.type = "(positive)";
  25426. }
  25427. }
  25428. advance(")", t);
  25429. state.condition = false;
  25430. var s = block(true, true);
  25431. // When the if is within a for-in loop and the condition has a negative form,
  25432. // check if the body contains nothing but a continue statement
  25433. if (forinifcheck && forinifcheck.type === "(negative)") {
  25434. if (s && s[0] && s[0].type === "(identifier)" && s[0].value === "continue") {
  25435. forinifcheck.type = "(negative-with-continue)";
  25436. }
  25437. }
  25438. if (state.tokens.next.id === "else") {
  25439. advance("else");
  25440. if (state.tokens.next.id === "if" || state.tokens.next.id === "switch") {
  25441. statement();
  25442. } else {
  25443. block(true, true);
  25444. }
  25445. }
  25446. return this;
  25447. });
  25448. blockstmt("try", function() {
  25449. var b;
  25450. function doCatch() {
  25451. advance("catch");
  25452. advance("(");
  25453. state.funct["(scope)"].stack("catchparams");
  25454. if (checkPunctuators(state.tokens.next, ["[", "{"])) {
  25455. var tokens = destructuringPattern();
  25456. _.each(tokens, function(token) {
  25457. if (token.id) {
  25458. state.funct["(scope)"].addParam(token.id, token, "exception");
  25459. }
  25460. });
  25461. } else if (state.tokens.next.type !== "(identifier)") {
  25462. warning("E030", state.tokens.next, state.tokens.next.value);
  25463. } else {
  25464. // only advance if we have an identifier so we can continue parsing in the most common error - that no param is given.
  25465. state.funct["(scope)"].addParam(identifier(), state.tokens.curr, "exception");
  25466. }
  25467. if (state.tokens.next.value === "if") {
  25468. if (!state.inMoz()) {
  25469. warning("W118", state.tokens.curr, "catch filter");
  25470. }
  25471. advance("if");
  25472. expression(0);
  25473. }
  25474. advance(")");
  25475. block(false);
  25476. state.funct["(scope)"].unstack();
  25477. }
  25478. block(true);
  25479. while (state.tokens.next.id === "catch") {
  25480. increaseComplexityCount();
  25481. if (b && (!state.inMoz())) {
  25482. warning("W118", state.tokens.next, "multiple catch blocks");
  25483. }
  25484. doCatch();
  25485. b = true;
  25486. }
  25487. if (state.tokens.next.id === "finally") {
  25488. advance("finally");
  25489. block(true);
  25490. return;
  25491. }
  25492. if (!b) {
  25493. error("E021", state.tokens.next, "catch", state.tokens.next.value);
  25494. }
  25495. return this;
  25496. });
  25497. blockstmt("while", function() {
  25498. var t = state.tokens.next;
  25499. state.funct["(breakage)"] += 1;
  25500. state.funct["(loopage)"] += 1;
  25501. increaseComplexityCount();
  25502. advance("(");
  25503. checkCondAssignment(expression(0));
  25504. advance(")", t);
  25505. block(true, true);
  25506. state.funct["(breakage)"] -= 1;
  25507. state.funct["(loopage)"] -= 1;
  25508. return this;
  25509. }).labelled = true;
  25510. blockstmt("with", function() {
  25511. var t = state.tokens.next;
  25512. if (state.isStrict()) {
  25513. error("E010", state.tokens.curr);
  25514. } else if (!state.option.withstmt) {
  25515. warning("W085", state.tokens.curr);
  25516. }
  25517. advance("(");
  25518. expression(0);
  25519. advance(")", t);
  25520. block(true, true);
  25521. return this;
  25522. });
  25523. blockstmt("switch", function() {
  25524. var t = state.tokens.next;
  25525. var g = false;
  25526. var noindent = false;
  25527. state.funct["(breakage)"] += 1;
  25528. advance("(");
  25529. checkCondAssignment(expression(0));
  25530. advance(")", t);
  25531. t = state.tokens.next;
  25532. advance("{");
  25533. state.funct["(scope)"].stack();
  25534. if (state.tokens.next.from === indent)
  25535. noindent = true;
  25536. if (!noindent)
  25537. indent += state.option.indent;
  25538. this.cases = [];
  25539. for (;;) {
  25540. switch (state.tokens.next.id) {
  25541. case "case":
  25542. switch (state.funct["(verb)"]) {
  25543. case "yield":
  25544. case "break":
  25545. case "case":
  25546. case "continue":
  25547. case "return":
  25548. case "switch":
  25549. case "throw":
  25550. break;
  25551. default:
  25552. // You can tell JSHint that you don't use break intentionally by
  25553. // adding a comment /* falls through */ on a line just before
  25554. // the next `case`.
  25555. if (!state.tokens.curr.caseFallsThrough) {
  25556. warning("W086", state.tokens.curr, "case");
  25557. }
  25558. }
  25559. advance("case");
  25560. this.cases.push(expression(0));
  25561. increaseComplexityCount();
  25562. g = true;
  25563. advance(":");
  25564. state.funct["(verb)"] = "case";
  25565. break;
  25566. case "default":
  25567. switch (state.funct["(verb)"]) {
  25568. case "yield":
  25569. case "break":
  25570. case "continue":
  25571. case "return":
  25572. case "throw":
  25573. break;
  25574. default:
  25575. // Do not display a warning if 'default' is the first statement or if
  25576. // there is a special /* falls through */ comment.
  25577. if (this.cases.length) {
  25578. if (!state.tokens.curr.caseFallsThrough) {
  25579. warning("W086", state.tokens.curr, "default");
  25580. }
  25581. }
  25582. }
  25583. advance("default");
  25584. g = true;
  25585. advance(":");
  25586. break;
  25587. case "}":
  25588. if (!noindent)
  25589. indent -= state.option.indent;
  25590. advance("}", t);
  25591. state.funct["(scope)"].unstack();
  25592. state.funct["(breakage)"] -= 1;
  25593. state.funct["(verb)"] = undefined;
  25594. return;
  25595. case "(end)":
  25596. error("E023", state.tokens.next, "}");
  25597. return;
  25598. default:
  25599. indent += state.option.indent;
  25600. if (g) {
  25601. switch (state.tokens.curr.id) {
  25602. case ",":
  25603. error("E040");
  25604. return;
  25605. case ":":
  25606. g = false;
  25607. statements();
  25608. break;
  25609. default:
  25610. error("E025", state.tokens.curr);
  25611. return;
  25612. }
  25613. } else {
  25614. if (state.tokens.curr.id === ":") {
  25615. advance(":");
  25616. error("E024", state.tokens.curr, ":");
  25617. statements();
  25618. } else {
  25619. error("E021", state.tokens.next, "case", state.tokens.next.value);
  25620. return;
  25621. }
  25622. }
  25623. indent -= state.option.indent;
  25624. }
  25625. }
  25626. }).labelled = true;
  25627. stmt("debugger", function() {
  25628. if (!state.option.debug) {
  25629. warning("W087", this);
  25630. }
  25631. return this;
  25632. }).exps = true;
  25633. (function() {
  25634. var x = stmt("do", function() {
  25635. state.funct["(breakage)"] += 1;
  25636. state.funct["(loopage)"] += 1;
  25637. increaseComplexityCount();
  25638. this.first = block(true, true);
  25639. advance("while");
  25640. var t = state.tokens.next;
  25641. advance("(");
  25642. checkCondAssignment(expression(0));
  25643. advance(")", t);
  25644. state.funct["(breakage)"] -= 1;
  25645. state.funct["(loopage)"] -= 1;
  25646. return this;
  25647. });
  25648. x.labelled = true;
  25649. x.exps = true;
  25650. }());
  25651. blockstmt("for", function() {
  25652. var s, t = state.tokens.next;
  25653. var letscope = false;
  25654. var foreachtok = null;
  25655. if (t.value === "each") {
  25656. foreachtok = t;
  25657. advance("each");
  25658. if (!state.inMoz()) {
  25659. warning("W118", state.tokens.curr, "for each");
  25660. }
  25661. }
  25662. increaseComplexityCount();
  25663. advance("(");
  25664. // what kind of for(…) statement it is? for(…of…)? for(…in…)? for(…;…;…)?
  25665. var nextop; // contains the token of the "in" or "of" operator
  25666. var i = 0;
  25667. var inof = ["in", "of"];
  25668. var level = 0; // BindingPattern "level" --- level 0 === no BindingPattern
  25669. var comma; // First comma punctuator at level 0
  25670. var initializer; // First initializer at level 0
  25671. var bindingPower;
  25672. var targets;
  25673. var target;
  25674. // If initial token is a BindingPattern, count it as such.
  25675. if (checkPunctuators(state.tokens.next, ["{", "["])) ++level;
  25676. do {
  25677. nextop = peek(i);
  25678. ++i;
  25679. if (checkPunctuators(nextop, ["{", "["])) ++level;
  25680. else if (checkPunctuators(nextop, ["}", "]"])) --level;
  25681. if (level < 0) break;
  25682. if (level === 0) {
  25683. if (!comma && checkPunctuator(nextop, ",")) comma = nextop;
  25684. else if (!initializer && checkPunctuator(nextop, "=")) initializer = nextop;
  25685. }
  25686. } while (
  25687. (level > 0 || !_.includes(inof, nextop.value) && nextop.value !== ";") &&
  25688. nextop.type !== "(end)");
  25689. // if we're in a for (… in|of …) statement
  25690. if (_.includes(inof, nextop.value)) {
  25691. if (nextop.value === "of") {
  25692. bindingPower = 20;
  25693. if (!state.inES6()) {
  25694. warning("W104", nextop, "for of", "6");
  25695. }
  25696. } else {
  25697. bindingPower = 0;
  25698. }
  25699. if (initializer) {
  25700. error("W133", comma, nextop.value, "initializer is forbidden");
  25701. }
  25702. if (comma) {
  25703. error("W133", comma, nextop.value, "more than one ForBinding");
  25704. }
  25705. if (state.tokens.next.id === "var") {
  25706. advance("var");
  25707. state.tokens.curr.fud({ prefix: true });
  25708. } else if (state.tokens.next.id === "let" || state.tokens.next.id === "const") {
  25709. advance(state.tokens.next.id);
  25710. // create a new block scope
  25711. letscope = true;
  25712. state.funct["(scope)"].stack();
  25713. state.tokens.curr.fud({ prefix: true });
  25714. } else {
  25715. targets = [];
  25716. // The following parsing logic recognizes initializers and the comma
  25717. // operator despite the fact that they are not supported by the
  25718. // grammar. Doing so allows JSHint to emit more a meaningful error
  25719. // message (i.e. W133) in response to a common programming mistake.
  25720. do {
  25721. if (checkPunctuators(state.tokens.next, ["{", "["])) {
  25722. destructuringPattern({ assignment: true }).forEach(function(elem) {
  25723. this.push(elem.token);
  25724. }, targets);
  25725. } else {
  25726. target = expression(120);
  25727. if (target.type === "(identifier)") {
  25728. targets.push(target);
  25729. }
  25730. checkLeftSideAssign(target, nextop);
  25731. }
  25732. if (checkPunctuator(state.tokens.next, "=")) {
  25733. advance("=");
  25734. expression(120);
  25735. }
  25736. if (checkPunctuator(state.tokens.next, ",")) {
  25737. advance(",");
  25738. }
  25739. } while (state.tokens.next !== nextop);
  25740. // In the event of a syntax error, do no issue warnings regarding the
  25741. // implicit creation of bindings.
  25742. if (!initializer && !comma) {
  25743. targets.forEach(function(token) {
  25744. if (!state.funct["(scope)"].has(token.value)) {
  25745. warning("W088", token, token.value);
  25746. }
  25747. });
  25748. }
  25749. }
  25750. advance(nextop.value);
  25751. // The binding power is variable because for-in statements accept any
  25752. // Expression in this position, while for-of statements are limited to
  25753. // AssignmentExpressions. For example:
  25754. //
  25755. // for ( LeftHandSideExpression in Expression ) Statement
  25756. // for ( LeftHandSideExpression of AssignmentExpression ) Statement
  25757. expression(bindingPower);
  25758. advance(")", t);
  25759. if (nextop.value === "in" && state.option.forin) {
  25760. state.forinifcheckneeded = true;
  25761. if (state.forinifchecks === undefined) {
  25762. state.forinifchecks = [];
  25763. }
  25764. // Push a new for-in-if check onto the stack. The type will be modified
  25765. // when the loop's body is parsed and a suitable if statement exists.
  25766. state.forinifchecks.push({
  25767. type: "(none)"
  25768. });
  25769. }
  25770. state.funct["(breakage)"] += 1;
  25771. state.funct["(loopage)"] += 1;
  25772. s = block(true, true);
  25773. if (nextop.value === "in" && state.option.forin) {
  25774. if (state.forinifchecks && state.forinifchecks.length > 0) {
  25775. var check = state.forinifchecks.pop();
  25776. if (// No if statement or not the first statement in loop body
  25777. s && s.length > 0 && (typeof s[0] !== "object" || s[0].value !== "if") ||
  25778. // Positive if statement is not the only one in loop body
  25779. check.type === "(positive)" && s.length > 1 ||
  25780. // Negative if statement but no continue
  25781. check.type === "(negative)") {
  25782. warning("W089", this);
  25783. }
  25784. }
  25785. // Reset the flag in case no if statement was contained in the loop body
  25786. state.forinifcheckneeded = false;
  25787. }
  25788. state.funct["(breakage)"] -= 1;
  25789. state.funct["(loopage)"] -= 1;
  25790. } else {
  25791. if (foreachtok) {
  25792. error("E045", foreachtok);
  25793. }
  25794. if (state.tokens.next.id !== ";") {
  25795. if (state.tokens.next.id === "var") {
  25796. advance("var");
  25797. state.tokens.curr.fud();
  25798. } else if (state.tokens.next.id === "let") {
  25799. advance("let");
  25800. // create a new block scope
  25801. letscope = true;
  25802. state.funct["(scope)"].stack();
  25803. state.tokens.curr.fud();
  25804. } else {
  25805. for (;;) {
  25806. expression(0, "for");
  25807. if (state.tokens.next.id !== ",") {
  25808. break;
  25809. }
  25810. parseComma();
  25811. }
  25812. }
  25813. }
  25814. nolinebreak(state.tokens.curr);
  25815. advance(";");
  25816. // start loopage after the first ; as the next two expressions are executed
  25817. // on every loop
  25818. state.funct["(loopage)"] += 1;
  25819. if (state.tokens.next.id !== ";") {
  25820. checkCondAssignment(expression(0));
  25821. }
  25822. nolinebreak(state.tokens.curr);
  25823. advance(";");
  25824. if (state.tokens.next.id === ";") {
  25825. error("E021", state.tokens.next, ")", ";");
  25826. }
  25827. if (state.tokens.next.id !== ")") {
  25828. for (;;) {
  25829. expression(0, "for");
  25830. if (state.tokens.next.id !== ",") {
  25831. break;
  25832. }
  25833. parseComma();
  25834. }
  25835. }
  25836. advance(")", t);
  25837. state.funct["(breakage)"] += 1;
  25838. block(true, true);
  25839. state.funct["(breakage)"] -= 1;
  25840. state.funct["(loopage)"] -= 1;
  25841. }
  25842. // unstack loop blockscope
  25843. if (letscope) {
  25844. state.funct["(scope)"].unstack();
  25845. }
  25846. return this;
  25847. }).labelled = true;
  25848. stmt("break", function() {
  25849. var v = state.tokens.next.value;
  25850. if (!state.option.asi)
  25851. nolinebreak(this);
  25852. if (state.tokens.next.id !== ";" && !state.tokens.next.reach &&
  25853. state.tokens.curr.line === startLine(state.tokens.next)) {
  25854. if (!state.funct["(scope)"].funct.hasBreakLabel(v)) {
  25855. warning("W090", state.tokens.next, v);
  25856. }
  25857. this.first = state.tokens.next;
  25858. advance();
  25859. } else {
  25860. if (state.funct["(breakage)"] === 0)
  25861. warning("W052", state.tokens.next, this.value);
  25862. }
  25863. reachable(this);
  25864. return this;
  25865. }).exps = true;
  25866. stmt("continue", function() {
  25867. var v = state.tokens.next.value;
  25868. if (state.funct["(breakage)"] === 0 || !state.funct["(loopage)"]) {
  25869. warning("W052", state.tokens.next, this.value);
  25870. }
  25871. if (!state.option.asi)
  25872. nolinebreak(this);
  25873. if (state.tokens.next.id !== ";" && !state.tokens.next.reach) {
  25874. if (state.tokens.curr.line === startLine(state.tokens.next)) {
  25875. if (!state.funct["(scope)"].funct.hasBreakLabel(v)) {
  25876. warning("W090", state.tokens.next, v);
  25877. }
  25878. this.first = state.tokens.next;
  25879. advance();
  25880. }
  25881. }
  25882. reachable(this);
  25883. return this;
  25884. }).exps = true;
  25885. stmt("return", function() {
  25886. if (this.line === startLine(state.tokens.next)) {
  25887. if (state.tokens.next.id !== ";" && !state.tokens.next.reach) {
  25888. this.first = expression(0);
  25889. if (this.first &&
  25890. this.first.type === "(punctuator)" && this.first.value === "=" &&
  25891. !this.first.paren && !state.option.boss) {
  25892. warningAt("W093", this.first.line, this.first.character);
  25893. }
  25894. }
  25895. } else {
  25896. if (state.tokens.next.type === "(punctuator)" &&
  25897. ["[", "{", "+", "-"].indexOf(state.tokens.next.value) > -1) {
  25898. nolinebreak(this); // always warn (Line breaking error)
  25899. }
  25900. }
  25901. reachable(this);
  25902. return this;
  25903. }).exps = true;
  25904. (function(x) {
  25905. x.exps = true;
  25906. x.lbp = 25;
  25907. x.ltBoundary = "after";
  25908. }(prefix("yield", function() {
  25909. if (state.inMoz()) {
  25910. return mozYield.call(this);
  25911. }
  25912. var prev = state.tokens.prev;
  25913. if (!this.beginsStmt && prev.lbp > 30 && !checkPunctuators(prev, ["("])) {
  25914. error("E061", this);
  25915. }
  25916. if (state.inES6(true) && !state.funct["(generator)"]) {
  25917. // If it's a yield within a catch clause inside a generator then that's ok
  25918. if (!("(catch)" === state.funct["(name)"] && state.funct["(context)"]["(generator)"])) {
  25919. error("E046", state.tokens.curr, "yield");
  25920. }
  25921. } else if (!state.inES6()) {
  25922. warning("W104", state.tokens.curr, "yield", "6");
  25923. }
  25924. state.funct["(generator)"] = "yielded";
  25925. if (state.tokens.next.value === "*") {
  25926. advance("*");
  25927. }
  25928. // Parse operand
  25929. if (!isEndOfExpr() && state.tokens.next.id !== ",") {
  25930. if (state.tokens.next.nud) {
  25931. nobreaknonadjacent(state.tokens.curr, state.tokens.next);
  25932. this.first = expression(10);
  25933. if (this.first.type === "(punctuator)" && this.first.value === "=" &&
  25934. !this.first.paren && !state.option.boss) {
  25935. warningAt("W093", this.first.line, this.first.character);
  25936. }
  25937. } else if (state.tokens.next.led) {
  25938. if (state.tokens.next.id !== ",") {
  25939. error("W017", state.tokens.next);
  25940. }
  25941. }
  25942. }
  25943. return this;
  25944. })));
  25945. /**
  25946. * Parsing logic for non-standard Mozilla implementation of `yield`
  25947. * expressions.
  25948. */
  25949. var mozYield = function() {
  25950. var prev = state.tokens.prev;
  25951. if (state.inES6(true) && !state.funct["(generator)"]) {
  25952. // If it's a yield within a catch clause inside a generator then that's ok
  25953. if (!("(catch)" === state.funct["(name)"] && state.funct["(context)"]["(generator)"])) {
  25954. error("E046", state.tokens.curr, "yield");
  25955. }
  25956. }
  25957. state.funct["(generator)"] = "yielded";
  25958. var delegatingYield = false;
  25959. if (state.tokens.next.value === "*") {
  25960. delegatingYield = true;
  25961. advance("*");
  25962. }
  25963. if (this.line === startLine(state.tokens.next)) {
  25964. if (delegatingYield ||
  25965. (state.tokens.next.id !== ";" && !state.option.asi &&
  25966. !state.tokens.next.reach && state.tokens.next.nud)) {
  25967. nobreaknonadjacent(state.tokens.curr, state.tokens.next);
  25968. this.first = expression(10);
  25969. if (this.first.type === "(punctuator)" && this.first.value === "=" &&
  25970. !this.first.paren && !state.option.boss) {
  25971. warningAt("W093", this.first.line, this.first.character);
  25972. }
  25973. }
  25974. if (state.tokens.next.id !== ")" &&
  25975. (prev.lbp > 30 || (!prev.assign && !isEndOfExpr()) || prev.id === "yield")) {
  25976. error("E050", this);
  25977. }
  25978. } else if (!state.option.asi) {
  25979. nolinebreak(this); // always warn (Line breaking error)
  25980. }
  25981. return this;
  25982. };
  25983. stmt("throw", function() {
  25984. nolinebreak(this);
  25985. this.first = expression(20);
  25986. reachable(this);
  25987. return this;
  25988. }).exps = true;
  25989. stmt("import", function() {
  25990. if (!state.funct["(scope)"].block.isGlobal()) {
  25991. error("E053", state.tokens.curr, "Import");
  25992. }
  25993. if (!state.inES6()) {
  25994. warning("W119", state.tokens.curr, "import", "6");
  25995. }
  25996. if (state.tokens.next.type === "(string)") {
  25997. // ModuleSpecifier :: StringLiteral
  25998. advance("(string)");
  25999. return this;
  26000. }
  26001. if (state.tokens.next.identifier) {
  26002. // ImportClause :: ImportedDefaultBinding
  26003. this.name = identifier();
  26004. // Import bindings are immutable (see ES6 8.1.1.5.5)
  26005. state.funct["(scope)"].addlabel(this.name, {
  26006. type: "import",
  26007. initialized: true,
  26008. token: state.tokens.curr });
  26009. if (state.tokens.next.value === ",") {
  26010. // ImportClause :: ImportedDefaultBinding , NameSpaceImport
  26011. // ImportClause :: ImportedDefaultBinding , NamedImports
  26012. advance(",");
  26013. // At this point, we intentionally fall through to continue matching
  26014. // either NameSpaceImport or NamedImports.
  26015. // Discussion:
  26016. // https://github.com/jshint/jshint/pull/2144#discussion_r23978406
  26017. } else {
  26018. advance("from");
  26019. advance("(string)");
  26020. return this;
  26021. }
  26022. }
  26023. if (state.tokens.next.id === "*") {
  26024. // ImportClause :: NameSpaceImport
  26025. advance("*");
  26026. advance("as");
  26027. if (state.tokens.next.identifier) {
  26028. this.name = identifier();
  26029. // Import bindings are immutable (see ES6 8.1.1.5.5)
  26030. state.funct["(scope)"].addlabel(this.name, {
  26031. type: "import",
  26032. initialized: true,
  26033. token: state.tokens.curr });
  26034. }
  26035. } else {
  26036. // ImportClause :: NamedImports
  26037. advance("{");
  26038. for (;;) {
  26039. if (state.tokens.next.value === "}") {
  26040. advance("}");
  26041. break;
  26042. }
  26043. var importName;
  26044. if (state.tokens.next.type === "default") {
  26045. importName = "default";
  26046. advance("default");
  26047. } else {
  26048. importName = identifier();
  26049. }
  26050. if (state.tokens.next.value === "as") {
  26051. advance("as");
  26052. importName = identifier();
  26053. }
  26054. // Import bindings are immutable (see ES6 8.1.1.5.5)
  26055. state.funct["(scope)"].addlabel(importName, {
  26056. type: "import",
  26057. initialized: true,
  26058. token: state.tokens.curr });
  26059. if (state.tokens.next.value === ",") {
  26060. advance(",");
  26061. } else if (state.tokens.next.value === "}") {
  26062. advance("}");
  26063. break;
  26064. } else {
  26065. error("E024", state.tokens.next, state.tokens.next.value);
  26066. break;
  26067. }
  26068. }
  26069. }
  26070. // FromClause
  26071. advance("from");
  26072. advance("(string)");
  26073. // Support for ES2015 modules was released without warning for `import`
  26074. // declarations that lack bindings. Issuing a warning would therefor
  26075. // constitute a breaking change.
  26076. // TODO: enable this warning in JSHint 3
  26077. // if (hasBindings) {
  26078. // warning("W142", this, "import", moduleSpecifier);
  26079. // }
  26080. return this;
  26081. }).exps = true;
  26082. stmt("export", function() {
  26083. var ok = true;
  26084. var token;
  26085. var identifier;
  26086. var moduleSpecifier;
  26087. if (!state.inES6()) {
  26088. warning("W119", state.tokens.curr, "export", "6");
  26089. ok = false;
  26090. }
  26091. if (!state.funct["(scope)"].block.isGlobal()) {
  26092. error("E053", state.tokens.curr, "Export");
  26093. ok = false;
  26094. }
  26095. if (state.tokens.next.value === "*") {
  26096. // ExportDeclaration :: export * FromClause
  26097. advance("*");
  26098. advance("from");
  26099. advance("(string)");
  26100. return this;
  26101. }
  26102. if (state.tokens.next.type === "default") {
  26103. // ExportDeclaration ::
  26104. // export default [lookahead ∉ { function, class }] AssignmentExpression[In] ;
  26105. // export default HoistableDeclaration
  26106. // export default ClassDeclaration
  26107. state.nameStack.set(state.tokens.next);
  26108. advance("default");
  26109. var exportType = state.tokens.next.id;
  26110. if (exportType === "function" || exportType === "class") {
  26111. this.block = true;
  26112. }
  26113. token = peek();
  26114. expression(10);
  26115. identifier = token.value;
  26116. if (this.block) {
  26117. state.funct["(scope)"].addlabel(identifier, {
  26118. type: exportType,
  26119. initialized: true,
  26120. token: token });
  26121. state.funct["(scope)"].setExported(identifier, token);
  26122. }
  26123. return this;
  26124. }
  26125. if (state.tokens.next.value === "{") {
  26126. // ExportDeclaration :: export ExportClause
  26127. advance("{");
  26128. var exportedTokens = [];
  26129. while (!checkPunctuator(state.tokens.next, "}")) {
  26130. if (!state.tokens.next.identifier) {
  26131. error("E030", state.tokens.next, state.tokens.next.value);
  26132. }
  26133. advance();
  26134. exportedTokens.push(state.tokens.curr);
  26135. if (state.tokens.next.value === "as") {
  26136. advance("as");
  26137. if (!state.tokens.next.identifier) {
  26138. error("E030", state.tokens.next, state.tokens.next.value);
  26139. }
  26140. advance();
  26141. }
  26142. if (!checkPunctuator(state.tokens.next, "}")) {
  26143. advance(",");
  26144. }
  26145. }
  26146. advance("}");
  26147. if (state.tokens.next.value === "from") {
  26148. // ExportDeclaration :: export ExportClause FromClause
  26149. advance("from");
  26150. moduleSpecifier = state.tokens.next;
  26151. advance("(string)");
  26152. } else if (ok) {
  26153. exportedTokens.forEach(function(token) {
  26154. state.funct["(scope)"].setExported(token.value, token);
  26155. });
  26156. }
  26157. if (exportedTokens.length === 0) {
  26158. if (moduleSpecifier) {
  26159. warning("W142", this, "export", moduleSpecifier.value);
  26160. } else {
  26161. warning("W141", this, "export");
  26162. }
  26163. }
  26164. return this;
  26165. }
  26166. if (state.tokens.next.id === "var") {
  26167. // ExportDeclaration :: export VariableStatement
  26168. advance("var");
  26169. state.tokens.curr.fud({ inexport:true });
  26170. } else if (state.tokens.next.id === "let") {
  26171. // ExportDeclaration :: export VariableStatement
  26172. advance("let");
  26173. state.tokens.curr.fud({ inexport:true });
  26174. } else if (state.tokens.next.id === "const") {
  26175. // ExportDeclaration :: export VariableStatement
  26176. advance("const");
  26177. state.tokens.curr.fud({ inexport:true });
  26178. } else if (state.tokens.next.id === "function") {
  26179. // ExportDeclaration :: export Declaration
  26180. this.block = true;
  26181. advance("function");
  26182. state.syntax["function"].fud({ inexport:true });
  26183. } else if (state.tokens.next.id === "class") {
  26184. // ExportDeclaration :: export Declaration
  26185. this.block = true;
  26186. advance("class");
  26187. var classNameToken = state.tokens.next;
  26188. state.syntax["class"].fud();
  26189. state.funct["(scope)"].setExported(classNameToken.value, classNameToken);
  26190. } else {
  26191. error("E024", state.tokens.next, state.tokens.next.value);
  26192. }
  26193. return this;
  26194. }).exps = true;
  26195. /**
  26196. * Determine if SuperCall or SuperProperty may be used in the current context
  26197. * (as described by the provided "functor" object).
  26198. *
  26199. * @param {string} type - one of "property" or "call"
  26200. * @param {object} funct - a "functor" object describing the current function
  26201. * context
  26202. *
  26203. * @returns {boolean}
  26204. */
  26205. function supportsSuper(type, funct) {
  26206. if (type === "property" && funct["(method)"]) {
  26207. return true;
  26208. }
  26209. if (type === "call" && funct["(statement)"] &&
  26210. funct["(statement)"].id === "class") {
  26211. return true;
  26212. }
  26213. if (funct["(arrow)"]) {
  26214. return supportsSuper(type, funct["(context)"]);
  26215. }
  26216. return false;
  26217. }
  26218. var superNud = function() {
  26219. var next = state.tokens.next;
  26220. if (checkPunctuators(next, ["[", "."])) {
  26221. if (!supportsSuper("property", state.funct)) {
  26222. error("E063", this);
  26223. }
  26224. } else if (checkPunctuator(next, "(")) {
  26225. if (!supportsSuper("call", state.funct)) {
  26226. error("E064", this);
  26227. }
  26228. } else {
  26229. error("E024", next, next.value || next.id);
  26230. }
  26231. return this;
  26232. };
  26233. // Future Reserved Words
  26234. FutureReservedWord("abstract");
  26235. FutureReservedWord("await", { es5: true, moduleOnly: true });
  26236. FutureReservedWord("boolean");
  26237. FutureReservedWord("byte");
  26238. FutureReservedWord("char");
  26239. FutureReservedWord("class", { es5: true, nud: classdef });
  26240. FutureReservedWord("double");
  26241. FutureReservedWord("enum", { es5: true });
  26242. FutureReservedWord("export", { es5: true });
  26243. FutureReservedWord("extends", { es5: true });
  26244. FutureReservedWord("final");
  26245. FutureReservedWord("float");
  26246. FutureReservedWord("goto");
  26247. FutureReservedWord("implements", { es5: true, strictOnly: true });
  26248. FutureReservedWord("import", { es5: true });
  26249. FutureReservedWord("int");
  26250. FutureReservedWord("interface", { es5: true, strictOnly: true });
  26251. FutureReservedWord("long");
  26252. FutureReservedWord("native");
  26253. FutureReservedWord("package", { es5: true, strictOnly: true });
  26254. FutureReservedWord("private", { es5: true, strictOnly: true });
  26255. FutureReservedWord("protected", { es5: true, strictOnly: true });
  26256. FutureReservedWord("public", { es5: true, strictOnly: true });
  26257. FutureReservedWord("short");
  26258. FutureReservedWord("static", { es5: true, strictOnly: true });
  26259. FutureReservedWord("super", { es5: true, nud: superNud });
  26260. FutureReservedWord("synchronized");
  26261. FutureReservedWord("transient");
  26262. FutureReservedWord("volatile");
  26263. // this function is used to determine whether a squarebracket or a curlybracket
  26264. // expression is a comprehension array, destructuring assignment or a json value.
  26265. var lookupBlockType = function() {
  26266. var pn, pn1, prev;
  26267. var i = -1;
  26268. var bracketStack = 0;
  26269. var ret = {};
  26270. if (checkPunctuators(state.tokens.curr, ["[", "{"])) {
  26271. bracketStack += 1;
  26272. }
  26273. do {
  26274. prev = i === -1 ? state.tokens.curr : pn;
  26275. pn = i === -1 ? state.tokens.next : peek(i);
  26276. pn1 = peek(i + 1);
  26277. i = i + 1;
  26278. if (checkPunctuators(pn, ["[", "{"])) {
  26279. bracketStack += 1;
  26280. } else if (checkPunctuators(pn, ["]", "}"])) {
  26281. bracketStack -= 1;
  26282. }
  26283. if (bracketStack === 1 && pn.identifier && pn.value === "for" &&
  26284. !checkPunctuator(prev, ".")) {
  26285. ret.isCompArray = true;
  26286. ret.notJson = true;
  26287. break;
  26288. }
  26289. if (bracketStack === 0 && checkPunctuators(pn, ["}", "]"])) {
  26290. if (pn1.value === "=") {
  26291. ret.isDestAssign = true;
  26292. ret.notJson = true;
  26293. break;
  26294. } else if (pn1.value === ".") {
  26295. ret.notJson = true;
  26296. break;
  26297. }
  26298. }
  26299. if (checkPunctuator(pn, ";")) {
  26300. ret.notJson = true;
  26301. }
  26302. } while (bracketStack > 0 && pn.id !== "(end)");
  26303. return ret;
  26304. };
  26305. function saveProperty(props, name, tkn, isClass, isStatic) {
  26306. var msg = ["key", "class method", "static class method"];
  26307. msg = msg[(isClass || false) + (isStatic || false)];
  26308. if (tkn.identifier) {
  26309. name = tkn.value;
  26310. }
  26311. if (props[name] && name !== "__proto__") {
  26312. warning("W075", state.tokens.next, msg, name);
  26313. } else {
  26314. props[name] = Object.create(null);
  26315. }
  26316. props[name].basic = true;
  26317. props[name].basictkn = tkn;
  26318. }
  26319. /**
  26320. * @param {string} accessorType - Either "get" or "set"
  26321. * @param {object} props - a collection of all properties of the object to
  26322. * which the current accessor is being assigned
  26323. * @param {object} tkn - the identifier token representing the accessor name
  26324. * @param {boolean} isClass - whether the accessor is part of an ES6 Class
  26325. * definition
  26326. * @param {boolean} isStatic - whether the accessor is a static method
  26327. */
  26328. function saveAccessor(accessorType, props, name, tkn, isClass, isStatic) {
  26329. var flagName = accessorType === "get" ? "getterToken" : "setterToken";
  26330. var msg = "";
  26331. if (isClass) {
  26332. if (isStatic) {
  26333. msg += "static ";
  26334. }
  26335. msg += accessorType + "ter method";
  26336. } else {
  26337. msg = "key";
  26338. }
  26339. state.tokens.curr.accessorType = accessorType;
  26340. state.nameStack.set(tkn);
  26341. if (props[name]) {
  26342. if ((props[name].basic || props[name][flagName]) && name !== "__proto__") {
  26343. warning("W075", state.tokens.next, msg, name);
  26344. }
  26345. } else {
  26346. props[name] = Object.create(null);
  26347. }
  26348. props[name][flagName] = tkn;
  26349. }
  26350. function computedPropertyName() {
  26351. advance("[");
  26352. if (!state.inES6()) {
  26353. warning("W119", state.tokens.curr, "computed property names", "6");
  26354. }
  26355. var value = expression(10);
  26356. advance("]");
  26357. return value;
  26358. }
  26359. /**
  26360. * Test whether a given token is a punctuator matching one of the specified values
  26361. * @param {Token} token
  26362. * @param {Array.<string>} values
  26363. * @returns {boolean}
  26364. */
  26365. function checkPunctuators(token, values) {
  26366. if (token.type === "(punctuator)") {
  26367. return _.includes(values, token.value);
  26368. }
  26369. return false;
  26370. }
  26371. /**
  26372. * Test whether a given token is a punctuator matching the specified value
  26373. * @param {Token} token
  26374. * @param {string} value
  26375. * @returns {boolean}
  26376. */
  26377. function checkPunctuator(token, value) {
  26378. return token.type === "(punctuator)" && token.value === value;
  26379. }
  26380. // Check whether this function has been reached for a destructuring assign with undeclared values
  26381. function destructuringAssignOrJsonValue() {
  26382. // lookup for the assignment (ECMAScript 6 only)
  26383. // if it has semicolons, it is a block, so go parse it as a block
  26384. // or it's not a block, but there are assignments, check for undeclared variables
  26385. var block = lookupBlockType();
  26386. if (block.notJson) {
  26387. if (!state.inES6() && block.isDestAssign) {
  26388. warning("W104", state.tokens.curr, "destructuring assignment", "6");
  26389. }
  26390. statements();
  26391. // otherwise parse json value
  26392. } else {
  26393. state.option.laxbreak = true;
  26394. state.jsonMode = true;
  26395. jsonValue();
  26396. }
  26397. }
  26398. // array comprehension parsing function
  26399. // parses and defines the three states of the list comprehension in order
  26400. // to avoid defining global variables, but keeping them to the list comprehension scope
  26401. // only. The order of the states are as follows:
  26402. // * "use" which will be the returned iterative part of the list comprehension
  26403. // * "define" which will define the variables local to the list comprehension
  26404. // * "filter" which will help filter out values
  26405. var arrayComprehension = function() {
  26406. var CompArray = function() {
  26407. this.mode = "use";
  26408. this.variables = [];
  26409. };
  26410. var _carrays = [];
  26411. var _current;
  26412. function declare(v) {
  26413. var l = _current.variables.filter(function(elt) {
  26414. // if it has, change its undef state
  26415. if (elt.value === v) {
  26416. elt.undef = false;
  26417. return v;
  26418. }
  26419. }).length;
  26420. return l !== 0;
  26421. }
  26422. function use(v) {
  26423. var l = _current.variables.filter(function(elt) {
  26424. // and if it has been defined
  26425. if (elt.value === v && !elt.undef) {
  26426. if (elt.unused === true) {
  26427. elt.unused = false;
  26428. }
  26429. return v;
  26430. }
  26431. }).length;
  26432. // otherwise we warn about it
  26433. return (l === 0);
  26434. }
  26435. return { stack: function() {
  26436. _current = new CompArray();
  26437. _carrays.push(_current);
  26438. },
  26439. unstack: function() {
  26440. _current.variables.filter(function(v) {
  26441. if (v.unused)
  26442. warning("W098", v.token, v.token.raw_text || v.value);
  26443. if (v.undef)
  26444. state.funct["(scope)"].block.use(v.value, v.token);
  26445. });
  26446. _carrays.splice(-1, 1);
  26447. _current = _carrays[_carrays.length - 1];
  26448. },
  26449. setState: function(s) {
  26450. if (_.includes(["use", "define", "generate", "filter"], s))
  26451. _current.mode = s;
  26452. },
  26453. check: function(v) {
  26454. if (!_current) {
  26455. return;
  26456. }
  26457. // When we are in "use" state of the list comp, we enqueue that var
  26458. if (_current && _current.mode === "use") {
  26459. if (use(v)) {
  26460. _current.variables.push({
  26461. token: state.tokens.curr,
  26462. value: v,
  26463. undef: true,
  26464. unused: false
  26465. });
  26466. }
  26467. return true;
  26468. // When we are in "define" state of the list comp,
  26469. } else if (_current && _current.mode === "define") {
  26470. // check if the variable has been used previously
  26471. if (!declare(v)) {
  26472. _current.variables.push({
  26473. token: state.tokens.curr,
  26474. value: v,
  26475. undef: false,
  26476. unused: true
  26477. });
  26478. }
  26479. return true;
  26480. // When we are in the "generate" state of the list comp,
  26481. } else if (_current && _current.mode === "generate") {
  26482. state.funct["(scope)"].block.use(v, state.tokens.curr);
  26483. return true;
  26484. // When we are in "filter" state,
  26485. } else if (_current && _current.mode === "filter") {
  26486. // we check whether current variable has been declared
  26487. if (use(v)) {
  26488. // if not we warn about it
  26489. state.funct["(scope)"].block.use(v, state.tokens.curr);
  26490. }
  26491. return true;
  26492. }
  26493. return false;
  26494. }
  26495. };
  26496. };
  26497. // Parse JSON
  26498. function jsonValue() {
  26499. function jsonObject() {
  26500. var o = {}, t = state.tokens.next;
  26501. advance("{");
  26502. if (state.tokens.next.id !== "}") {
  26503. for (;;) {
  26504. if (state.tokens.next.id === "(end)") {
  26505. error("E026", state.tokens.next, t.line);
  26506. } else if (state.tokens.next.id === "}") {
  26507. warning("W094", state.tokens.curr);
  26508. break;
  26509. } else if (state.tokens.next.id === ",") {
  26510. error("E028", state.tokens.next);
  26511. } else if (state.tokens.next.id !== "(string)") {
  26512. warning("W095", state.tokens.next, state.tokens.next.value);
  26513. }
  26514. if (o[state.tokens.next.value] === true) {
  26515. warning("W075", state.tokens.next, "key", state.tokens.next.value);
  26516. } else if ((state.tokens.next.value === "__proto__" &&
  26517. !state.option.proto) || (state.tokens.next.value === "__iterator__" &&
  26518. !state.option.iterator)) {
  26519. warning("W096", state.tokens.next, state.tokens.next.value);
  26520. } else {
  26521. o[state.tokens.next.value] = true;
  26522. }
  26523. advance();
  26524. advance(":");
  26525. jsonValue();
  26526. if (state.tokens.next.id !== ",") {
  26527. break;
  26528. }
  26529. advance(",");
  26530. }
  26531. }
  26532. advance("}");
  26533. }
  26534. function jsonArray() {
  26535. var t = state.tokens.next;
  26536. advance("[");
  26537. if (state.tokens.next.id !== "]") {
  26538. for (;;) {
  26539. if (state.tokens.next.id === "(end)") {
  26540. error("E027", state.tokens.next, t.line);
  26541. } else if (state.tokens.next.id === "]") {
  26542. warning("W094", state.tokens.curr);
  26543. break;
  26544. } else if (state.tokens.next.id === ",") {
  26545. error("E028", state.tokens.next);
  26546. }
  26547. jsonValue();
  26548. if (state.tokens.next.id !== ",") {
  26549. break;
  26550. }
  26551. advance(",");
  26552. }
  26553. }
  26554. advance("]");
  26555. }
  26556. switch (state.tokens.next.id) {
  26557. case "{":
  26558. jsonObject();
  26559. break;
  26560. case "[":
  26561. jsonArray();
  26562. break;
  26563. case "true":
  26564. case "false":
  26565. case "null":
  26566. case "(number)":
  26567. case "(string)":
  26568. advance();
  26569. break;
  26570. case "-":
  26571. advance("-");
  26572. advance("(number)");
  26573. break;
  26574. default:
  26575. error("E003", state.tokens.next);
  26576. }
  26577. }
  26578. /**
  26579. * Lint dynamically-evaluated code, appending any resulting errors/warnings
  26580. * into the global `errors` array.
  26581. *
  26582. * @param {array} internals - collection of "internals" objects describing
  26583. * string tokens that contain evaluated code
  26584. * @param {object} options - linting options to apply
  26585. * @param {object} globals - globally-defined bindings for the evaluated code
  26586. */
  26587. function lintEvalCode(internals, options, globals) {
  26588. var priorErrorCount, idx, jdx, internal;
  26589. for (idx = 0; idx < internals.length; idx += 1) {
  26590. internal = internals[idx];
  26591. options.scope = internal.elem;
  26592. priorErrorCount = JSHINT.errors.length;
  26593. itself(internal.code, options, globals);
  26594. for (jdx = priorErrorCount; jdx < JSHINT.errors.length; jdx += 1) {
  26595. JSHINT.errors[jdx].line += internal.token.line - 1;
  26596. }
  26597. }
  26598. }
  26599. var escapeRegex = function(str) {
  26600. return str.replace(/[-\/\\^$*+?.()|[\]{}]/g, "\\$&");
  26601. };
  26602. // The actual JSHINT function itself.
  26603. var itself = function(s, o, g) {
  26604. var x, reIgnoreStr, reIgnore;
  26605. var optionKeys;
  26606. var newOptionObj = {};
  26607. var newIgnoredObj = {};
  26608. o = _.clone(o);
  26609. state.reset();
  26610. if (o && o.scope) {
  26611. JSHINT.scope = o.scope;
  26612. } else {
  26613. JSHINT.errors = [];
  26614. JSHINT.internals = [];
  26615. JSHINT.blacklist = {};
  26616. JSHINT.scope = "(main)";
  26617. }
  26618. predefined = Object.create(null);
  26619. combine(predefined, vars.ecmaIdentifiers[3]);
  26620. combine(predefined, vars.reservedVars);
  26621. combine(predefined, g || {});
  26622. declared = Object.create(null);
  26623. var exported = Object.create(null); // Variables that live outside the current file
  26624. function each(obj, cb) {
  26625. if (!obj)
  26626. return;
  26627. if (!Array.isArray(obj) && typeof obj === "object")
  26628. obj = Object.keys(obj);
  26629. obj.forEach(cb);
  26630. }
  26631. if (o) {
  26632. each(o.predef || null, function(item) {
  26633. var slice, prop;
  26634. if (item[0] === "-") {
  26635. slice = item.slice(1);
  26636. JSHINT.blacklist[slice] = slice;
  26637. // remove from predefined if there
  26638. delete predefined[slice];
  26639. } else {
  26640. prop = Object.getOwnPropertyDescriptor(o.predef, item);
  26641. predefined[item] = prop ? prop.value : false;
  26642. }
  26643. });
  26644. each(o.exported || null, function(item) {
  26645. exported[item] = true;
  26646. });
  26647. delete o.predef;
  26648. delete o.exported;
  26649. optionKeys = Object.keys(o);
  26650. for (x = 0; x < optionKeys.length; x++) {
  26651. if (/^-W\d{3}$/g.test(optionKeys[x])) {
  26652. newIgnoredObj[optionKeys[x].slice(1)] = true;
  26653. } else {
  26654. var optionKey = optionKeys[x];
  26655. newOptionObj[optionKey] = o[optionKey];
  26656. }
  26657. }
  26658. }
  26659. state.option = newOptionObj;
  26660. state.ignored = newIgnoredObj;
  26661. state.option.indent = state.option.indent || 4;
  26662. state.option.maxerr = state.option.maxerr || 50;
  26663. indent = 1;
  26664. var scopeManagerInst = scopeManager(state, predefined, exported, declared);
  26665. scopeManagerInst.on("warning", function(ev) {
  26666. warning.apply(null, [ ev.code, ev.token].concat(ev.data));
  26667. });
  26668. scopeManagerInst.on("error", function(ev) {
  26669. error.apply(null, [ ev.code, ev.token ].concat(ev.data));
  26670. });
  26671. state.funct = functor("(global)", null, {
  26672. "(global)" : true,
  26673. "(scope)" : scopeManagerInst,
  26674. "(comparray)" : arrayComprehension(),
  26675. "(metrics)" : createMetrics(state.tokens.next)
  26676. });
  26677. functions = [state.funct];
  26678. urls = [];
  26679. member = {};
  26680. membersOnly = null;
  26681. inblock = false;
  26682. lookahead = [];
  26683. if (!isString(s) && !Array.isArray(s)) {
  26684. errorAt("E004", 0);
  26685. return false;
  26686. }
  26687. api = {
  26688. get isJSON() {
  26689. return state.jsonMode;
  26690. },
  26691. getOption: function(name) {
  26692. return state.option[name] || null;
  26693. },
  26694. getCache: function(name) {
  26695. return state.cache[name];
  26696. },
  26697. setCache: function(name, value) {
  26698. state.cache[name] = value;
  26699. },
  26700. warn: function(code, data) {
  26701. warningAt.apply(null, [ code, data.line, data.char ].concat(data.data));
  26702. },
  26703. on: function(names, listener) {
  26704. names.split(" ").forEach(function(name) {
  26705. emitter.on(name, listener);
  26706. }.bind(this));
  26707. }
  26708. };
  26709. emitter.removeAllListeners();
  26710. (extraModules || []).forEach(function(func) {
  26711. func(api);
  26712. });
  26713. state.tokens.prev = state.tokens.curr = state.tokens.next = state.syntax["(begin)"];
  26714. if (o && o.ignoreDelimiters) {
  26715. if (!Array.isArray(o.ignoreDelimiters)) {
  26716. o.ignoreDelimiters = [o.ignoreDelimiters];
  26717. }
  26718. o.ignoreDelimiters.forEach(function(delimiterPair) {
  26719. if (!delimiterPair.start || !delimiterPair.end)
  26720. return;
  26721. reIgnoreStr = escapeRegex(delimiterPair.start) +
  26722. "[\\s\\S]*?" +
  26723. escapeRegex(delimiterPair.end);
  26724. reIgnore = new RegExp(reIgnoreStr, "ig");
  26725. s = s.replace(reIgnore, function(match) {
  26726. return match.replace(/./g, " ");
  26727. });
  26728. });
  26729. }
  26730. lex = new Lexer(s);
  26731. lex.on("warning", function(ev) {
  26732. warningAt.apply(null, [ ev.code, ev.line, ev.character].concat(ev.data));
  26733. });
  26734. lex.on("error", function(ev) {
  26735. errorAt.apply(null, [ ev.code, ev.line, ev.character ].concat(ev.data));
  26736. });
  26737. lex.on("fatal", function(ev) {
  26738. quit("E041", ev);
  26739. });
  26740. lex.on("Identifier", function(ev) {
  26741. emitter.emit("Identifier", ev);
  26742. });
  26743. lex.on("String", function(ev) {
  26744. emitter.emit("String", ev);
  26745. });
  26746. lex.on("Number", function(ev) {
  26747. emitter.emit("Number", ev);
  26748. });
  26749. // Check options
  26750. for (var name in o) {
  26751. if (_.has(o, name)) {
  26752. checkOption(name, state.tokens.curr);
  26753. }
  26754. }
  26755. try {
  26756. applyOptions();
  26757. // combine the passed globals after we've assumed all our options
  26758. combine(predefined, g || {});
  26759. //reset values
  26760. parseComma.first = true;
  26761. advance();
  26762. switch (state.tokens.next.id) {
  26763. case "{":
  26764. case "[":
  26765. destructuringAssignOrJsonValue();
  26766. break;
  26767. default:
  26768. directives();
  26769. if (state.directive["use strict"]) {
  26770. if (!state.allowsGlobalUsd()) {
  26771. warning("W097", state.tokens.prev);
  26772. }
  26773. }
  26774. statements();
  26775. }
  26776. if (state.tokens.next.id !== "(end)") {
  26777. quit("E041", state.tokens.curr);
  26778. }
  26779. state.funct["(scope)"].unstack();
  26780. } catch (err) {
  26781. if (err && err.name === "JSHintError") {
  26782. var nt = state.tokens.next || {};
  26783. JSHINT.errors.push({
  26784. scope : "(main)",
  26785. raw : err.raw,
  26786. code : err.code,
  26787. reason : err.reason,
  26788. line : err.line || nt.line,
  26789. character : err.character || nt.from
  26790. });
  26791. } else {
  26792. throw err;
  26793. }
  26794. }
  26795. // Loop over the listed "internals", and check them as well.
  26796. if (JSHINT.scope === "(main)") {
  26797. lintEvalCode(JSHINT.internals, o || {}, g);
  26798. }
  26799. return JSHINT.errors.length === 0;
  26800. };
  26801. // Modules.
  26802. itself.addModule = function(func) {
  26803. extraModules.push(func);
  26804. };
  26805. itself.addModule(style.register);
  26806. // Data summary.
  26807. itself.data = function() {
  26808. var data = {
  26809. functions: [],
  26810. options: state.option
  26811. };
  26812. var fu, f, i, n, globals;
  26813. if (itself.errors.length) {
  26814. data.errors = itself.errors;
  26815. }
  26816. if (state.jsonMode) {
  26817. data.json = true;
  26818. }
  26819. var impliedGlobals = state.funct["(scope)"].getImpliedGlobals();
  26820. if (impliedGlobals.length > 0) {
  26821. data.implieds = impliedGlobals;
  26822. }
  26823. if (urls.length > 0) {
  26824. data.urls = urls;
  26825. }
  26826. globals = state.funct["(scope)"].getUsedOrDefinedGlobals();
  26827. if (globals.length > 0) {
  26828. data.globals = globals;
  26829. }
  26830. for (i = 1; i < functions.length; i += 1) {
  26831. f = functions[i];
  26832. fu = {};
  26833. fu.name = f["(name)"];
  26834. fu.param = f["(params)"];
  26835. fu.line = f["(line)"];
  26836. fu.character = f["(character)"];
  26837. fu.last = f["(last)"];
  26838. fu.lastcharacter = f["(lastcharacter)"];
  26839. fu.metrics = {
  26840. complexity: f["(metrics)"].ComplexityCount,
  26841. parameters: f["(metrics)"].arity,
  26842. statements: f["(metrics)"].statementCount
  26843. };
  26844. data.functions.push(fu);
  26845. }
  26846. var unuseds = state.funct["(scope)"].getUnuseds();
  26847. if (unuseds.length > 0) {
  26848. data.unused = unuseds;
  26849. }
  26850. for (n in member) {
  26851. if (typeof member[n] === "number") {
  26852. data.member = member;
  26853. break;
  26854. }
  26855. }
  26856. return data;
  26857. };
  26858. itself.jshint = itself;
  26859. return itself;
  26860. }());
  26861. // Make JSHINT a Node module, if possible.
  26862. if (typeof exports === "object" && exports) {
  26863. exports.JSHINT = JSHINT;
  26864. }
  26865. },{"./lex.js":14,"./messages.js":15,"./options.js":17,"./reg.js":18,"./scope-manager.js":19,"./state.js":20,"./style.js":21,"./vars.js":22,"console-browserify":11,"events":6,"lodash":13}]},{},[]);
  26866. JSHINT = require('jshint').JSHINT;
  26867. if (typeof exports === 'object' && exports) exports.JSHINT = JSHINT;
  26868. }());