jshint.js 1.1 MB

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  1. /*! 2.9.7 */
  2. var JSHINT;
  3. if (typeof window === 'undefined') window = {};
  4. (function () {
  5. var require;
  6. 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){
  7. var identifierStartTable = [];
  8. for (var i = 0; i < 128; i++) {
  9. identifierStartTable[i] =
  10. i === 36 || // $
  11. i >= 65 && i <= 90 || // A-Z
  12. i === 95 || // _
  13. i >= 97 && i <= 122; // a-z
  14. }
  15. var identifierPartTable = [];
  16. for (var i = 0; i < 128; i++) {
  17. identifierPartTable[i] =
  18. identifierStartTable[i] || // $, _, A-Z, a-z
  19. i >= 48 && i <= 57; // 0-9
  20. }
  21. module.exports = {
  22. asciiIdentifierStartTable: identifierStartTable,
  23. asciiIdentifierPartTable: identifierPartTable
  24. };
  25. },{}],2:[function(require,module,exports){
  26. module.exports = 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  27. },{}],3:[function(require,module,exports){
  28. var str = 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  29. var arr = str.split(',').map(function(code) {
  30. return parseInt(code, 10);
  31. });
  32. module.exports = arr;
  33. },{}],4:[function(require,module,exports){
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  35. var arr = str.split(',').map(function(code) {
  36. return parseInt(code, 10);
  37. });
  38. module.exports = arr;
  39. },{}],5:[function(require,module,exports){
  40. // http://wiki.commonjs.org/wiki/Unit_Testing/1.0
  41. //
  42. // THIS IS NOT TESTED NOR LIKELY TO WORK OUTSIDE V8!
  43. //
  44. // Originally from narwhal.js (http://narwhaljs.org)
  45. // Copyright (c) 2009 Thomas Robinson <280north.com>
  46. //
  47. // Permission is hereby granted, free of charge, to any person obtaining a copy
  48. // of this software and associated documentation files (the 'Software'), to
  49. // deal in the Software without restriction, including without limitation the
  50. // rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
  51. // sell copies of the Software, and to permit persons to whom the Software is
  52. // furnished to do so, subject to the following conditions:
  53. //
  54. // The above copyright notice and this permission notice shall be included in
  55. // all copies or substantial portions of the Software.
  56. //
  57. // THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  58. // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  59. // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  60. // AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  61. // ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  62. // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  63. // when used in node, this will actually load the util module we depend on
  64. // versus loading the builtin util module as happens otherwise
  65. // this is a bug in node module loading as far as I am concerned
  66. var util = require('util/');
  67. var pSlice = Array.prototype.slice;
  68. var hasOwn = Object.prototype.hasOwnProperty;
  69. // 1. The assert module provides functions that throw
  70. // AssertionError's when particular conditions are not met. The
  71. // assert module must conform to the following interface.
  72. var assert = module.exports = ok;
  73. // 2. The AssertionError is defined in assert.
  74. // new assert.AssertionError({ message: message,
  75. // actual: actual,
  76. // expected: expected })
  77. assert.AssertionError = function AssertionError(options) {
  78. this.name = 'AssertionError';
  79. this.actual = options.actual;
  80. this.expected = options.expected;
  81. this.operator = options.operator;
  82. if (options.message) {
  83. this.message = options.message;
  84. this.generatedMessage = false;
  85. } else {
  86. this.message = getMessage(this);
  87. this.generatedMessage = true;
  88. }
  89. var stackStartFunction = options.stackStartFunction || fail;
  90. if (Error.captureStackTrace) {
  91. Error.captureStackTrace(this, stackStartFunction);
  92. }
  93. else {
  94. // non v8 browsers so we can have a stacktrace
  95. var err = new Error();
  96. if (err.stack) {
  97. var out = err.stack;
  98. // try to strip useless frames
  99. var fn_name = stackStartFunction.name;
  100. var idx = out.indexOf('\n' + fn_name);
  101. if (idx >= 0) {
  102. // once we have located the function frame
  103. // we need to strip out everything before it (and its line)
  104. var next_line = out.indexOf('\n', idx + 1);
  105. out = out.substring(next_line + 1);
  106. }
  107. this.stack = out;
  108. }
  109. }
  110. };
  111. // assert.AssertionError instanceof Error
  112. util.inherits(assert.AssertionError, Error);
  113. function replacer(key, value) {
  114. if (util.isUndefined(value)) {
  115. return '' + value;
  116. }
  117. if (util.isNumber(value) && !isFinite(value)) {
  118. return value.toString();
  119. }
  120. if (util.isFunction(value) || util.isRegExp(value)) {
  121. return value.toString();
  122. }
  123. return value;
  124. }
  125. function truncate(s, n) {
  126. if (util.isString(s)) {
  127. return s.length < n ? s : s.slice(0, n);
  128. } else {
  129. return s;
  130. }
  131. }
  132. function getMessage(self) {
  133. return truncate(JSON.stringify(self.actual, replacer), 128) + ' ' +
  134. self.operator + ' ' +
  135. truncate(JSON.stringify(self.expected, replacer), 128);
  136. }
  137. // At present only the three keys mentioned above are used and
  138. // understood by the spec. Implementations or sub modules can pass
  139. // other keys to the AssertionError's constructor - they will be
  140. // ignored.
  141. // 3. All of the following functions must throw an AssertionError
  142. // when a corresponding condition is not met, with a message that
  143. // may be undefined if not provided. All assertion methods provide
  144. // both the actual and expected values to the assertion error for
  145. // display purposes.
  146. function fail(actual, expected, message, operator, stackStartFunction) {
  147. throw new assert.AssertionError({
  148. message: message,
  149. actual: actual,
  150. expected: expected,
  151. operator: operator,
  152. stackStartFunction: stackStartFunction
  153. });
  154. }
  155. // EXTENSION! allows for well behaved errors defined elsewhere.
  156. assert.fail = fail;
  157. // 4. Pure assertion tests whether a value is truthy, as determined
  158. // by !!guard.
  159. // assert.ok(guard, message_opt);
  160. // This statement is equivalent to assert.equal(true, !!guard,
  161. // message_opt);. To test strictly for the value true, use
  162. // assert.strictEqual(true, guard, message_opt);.
  163. function ok(value, message) {
  164. if (!value) fail(value, true, message, '==', assert.ok);
  165. }
  166. assert.ok = ok;
  167. // 5. The equality assertion tests shallow, coercive equality with
  168. // ==.
  169. // assert.equal(actual, expected, message_opt);
  170. assert.equal = function equal(actual, expected, message) {
  171. if (actual != expected) fail(actual, expected, message, '==', assert.equal);
  172. };
  173. // 6. The non-equality assertion tests for whether two objects are not equal
  174. // with != assert.notEqual(actual, expected, message_opt);
  175. assert.notEqual = function notEqual(actual, expected, message) {
  176. if (actual == expected) {
  177. fail(actual, expected, message, '!=', assert.notEqual);
  178. }
  179. };
  180. // 7. The equivalence assertion tests a deep equality relation.
  181. // assert.deepEqual(actual, expected, message_opt);
  182. assert.deepEqual = function deepEqual(actual, expected, message) {
  183. if (!_deepEqual(actual, expected)) {
  184. fail(actual, expected, message, 'deepEqual', assert.deepEqual);
  185. }
  186. };
  187. function _deepEqual(actual, expected) {
  188. // 7.1. All identical values are equivalent, as determined by ===.
  189. if (actual === expected) {
  190. return true;
  191. } else if (util.isBuffer(actual) && util.isBuffer(expected)) {
  192. if (actual.length != expected.length) return false;
  193. for (var i = 0; i < actual.length; i++) {
  194. if (actual[i] !== expected[i]) return false;
  195. }
  196. return true;
  197. // 7.2. If the expected value is a Date object, the actual value is
  198. // equivalent if it is also a Date object that refers to the same time.
  199. } else if (util.isDate(actual) && util.isDate(expected)) {
  200. return actual.getTime() === expected.getTime();
  201. // 7.3 If the expected value is a RegExp object, the actual value is
  202. // equivalent if it is also a RegExp object with the same source and
  203. // properties (`global`, `multiline`, `lastIndex`, `ignoreCase`).
  204. } else if (util.isRegExp(actual) && util.isRegExp(expected)) {
  205. return actual.source === expected.source &&
  206. actual.global === expected.global &&
  207. actual.multiline === expected.multiline &&
  208. actual.lastIndex === expected.lastIndex &&
  209. actual.ignoreCase === expected.ignoreCase;
  210. // 7.4. Other pairs that do not both pass typeof value == 'object',
  211. // equivalence is determined by ==.
  212. } else if (!util.isObject(actual) && !util.isObject(expected)) {
  213. return actual == expected;
  214. // 7.5 For all other Object pairs, including Array objects, equivalence is
  215. // determined by having the same number of owned properties (as verified
  216. // with Object.prototype.hasOwnProperty.call), the same set of keys
  217. // (although not necessarily the same order), equivalent values for every
  218. // corresponding key, and an identical 'prototype' property. Note: this
  219. // accounts for both named and indexed properties on Arrays.
  220. } else {
  221. return objEquiv(actual, expected);
  222. }
  223. }
  224. function isArguments(object) {
  225. return Object.prototype.toString.call(object) == '[object Arguments]';
  226. }
  227. function objEquiv(a, b) {
  228. if (util.isNullOrUndefined(a) || util.isNullOrUndefined(b))
  229. return false;
  230. // an identical 'prototype' property.
  231. if (a.prototype !== b.prototype) return false;
  232. // if one is a primitive, the other must be same
  233. if (util.isPrimitive(a) || util.isPrimitive(b)) {
  234. return a === b;
  235. }
  236. var aIsArgs = isArguments(a),
  237. bIsArgs = isArguments(b);
  238. if ((aIsArgs && !bIsArgs) || (!aIsArgs && bIsArgs))
  239. return false;
  240. if (aIsArgs) {
  241. a = pSlice.call(a);
  242. b = pSlice.call(b);
  243. return _deepEqual(a, b);
  244. }
  245. var ka = objectKeys(a),
  246. kb = objectKeys(b),
  247. key, i;
  248. // having the same number of owned properties (keys incorporates
  249. // hasOwnProperty)
  250. if (ka.length != kb.length)
  251. return false;
  252. //the same set of keys (although not necessarily the same order),
  253. ka.sort();
  254. kb.sort();
  255. //~~~cheap key test
  256. for (i = ka.length - 1; i >= 0; i--) {
  257. if (ka[i] != kb[i])
  258. return false;
  259. }
  260. //equivalent values for every corresponding key, and
  261. //~~~possibly expensive deep test
  262. for (i = ka.length - 1; i >= 0; i--) {
  263. key = ka[i];
  264. if (!_deepEqual(a[key], b[key])) return false;
  265. }
  266. return true;
  267. }
  268. // 8. The non-equivalence assertion tests for any deep inequality.
  269. // assert.notDeepEqual(actual, expected, message_opt);
  270. assert.notDeepEqual = function notDeepEqual(actual, expected, message) {
  271. if (_deepEqual(actual, expected)) {
  272. fail(actual, expected, message, 'notDeepEqual', assert.notDeepEqual);
  273. }
  274. };
  275. // 9. The strict equality assertion tests strict equality, as determined by ===.
  276. // assert.strictEqual(actual, expected, message_opt);
  277. assert.strictEqual = function strictEqual(actual, expected, message) {
  278. if (actual !== expected) {
  279. fail(actual, expected, message, '===', assert.strictEqual);
  280. }
  281. };
  282. // 10. The strict non-equality assertion tests for strict inequality, as
  283. // determined by !==. assert.notStrictEqual(actual, expected, message_opt);
  284. assert.notStrictEqual = function notStrictEqual(actual, expected, message) {
  285. if (actual === expected) {
  286. fail(actual, expected, message, '!==', assert.notStrictEqual);
  287. }
  288. };
  289. function expectedException(actual, expected) {
  290. if (!actual || !expected) {
  291. return false;
  292. }
  293. if (Object.prototype.toString.call(expected) == '[object RegExp]') {
  294. return expected.test(actual);
  295. } else if (actual instanceof expected) {
  296. return true;
  297. } else if (expected.call({}, actual) === true) {
  298. return true;
  299. }
  300. return false;
  301. }
  302. function _throws(shouldThrow, block, expected, message) {
  303. var actual;
  304. if (util.isString(expected)) {
  305. message = expected;
  306. expected = null;
  307. }
  308. try {
  309. block();
  310. } catch (e) {
  311. actual = e;
  312. }
  313. message = (expected && expected.name ? ' (' + expected.name + ').' : '.') +
  314. (message ? ' ' + message : '.');
  315. if (shouldThrow && !actual) {
  316. fail(actual, expected, 'Missing expected exception' + message);
  317. }
  318. if (!shouldThrow && expectedException(actual, expected)) {
  319. fail(actual, expected, 'Got unwanted exception' + message);
  320. }
  321. if ((shouldThrow && actual && expected &&
  322. !expectedException(actual, expected)) || (!shouldThrow && actual)) {
  323. throw actual;
  324. }
  325. }
  326. // 11. Expected to throw an error:
  327. // assert.throws(block, Error_opt, message_opt);
  328. assert.throws = function(block, /*optional*/error, /*optional*/message) {
  329. _throws.apply(this, [true].concat(pSlice.call(arguments)));
  330. };
  331. // EXTENSION! This is annoying to write outside this module.
  332. assert.doesNotThrow = function(block, /*optional*/message) {
  333. _throws.apply(this, [false].concat(pSlice.call(arguments)));
  334. };
  335. assert.ifError = function(err) { if (err) {throw err;}};
  336. var objectKeys = Object.keys || function (obj) {
  337. var keys = [];
  338. for (var key in obj) {
  339. if (hasOwn.call(obj, key)) keys.push(key);
  340. }
  341. return keys;
  342. };
  343. },{"util/":10}],6:[function(require,module,exports){
  344. // Copyright Joyent, Inc. and other Node contributors.
  345. //
  346. // Permission is hereby granted, free of charge, to any person obtaining a
  347. // copy of this software and associated documentation files (the
  348. // "Software"), to deal in the Software without restriction, including
  349. // without limitation the rights to use, copy, modify, merge, publish,
  350. // distribute, sublicense, and/or sell copies of the Software, and to permit
  351. // persons to whom the Software is furnished to do so, subject to the
  352. // following conditions:
  353. //
  354. // The above copyright notice and this permission notice shall be included
  355. // in all copies or substantial portions of the Software.
  356. //
  357. // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  358. // OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  359. // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
  360. // NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
  361. // DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  362. // OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  363. // USE OR OTHER DEALINGS IN THE SOFTWARE.
  364. function EventEmitter() {
  365. this._events = this._events || {};
  366. this._maxListeners = this._maxListeners || undefined;
  367. }
  368. module.exports = EventEmitter;
  369. // Backwards-compat with node 0.10.x
  370. EventEmitter.EventEmitter = EventEmitter;
  371. EventEmitter.prototype._events = undefined;
  372. EventEmitter.prototype._maxListeners = undefined;
  373. // By default EventEmitters will print a warning if more than 10 listeners are
  374. // added to it. This is a useful default which helps finding memory leaks.
  375. EventEmitter.defaultMaxListeners = 10;
  376. // Obviously not all Emitters should be limited to 10. This function allows
  377. // that to be increased. Set to zero for unlimited.
  378. EventEmitter.prototype.setMaxListeners = function(n) {
  379. if (!isNumber(n) || n < 0 || isNaN(n))
  380. throw TypeError('n must be a positive number');
  381. this._maxListeners = n;
  382. return this;
  383. };
  384. EventEmitter.prototype.emit = function(type) {
  385. var er, handler, len, args, i, listeners;
  386. if (!this._events)
  387. this._events = {};
  388. // If there is no 'error' event listener then throw.
  389. if (type === 'error') {
  390. if (!this._events.error ||
  391. (isObject(this._events.error) && !this._events.error.length)) {
  392. er = arguments[1];
  393. if (er instanceof Error) {
  394. throw er; // Unhandled 'error' event
  395. }
  396. throw TypeError('Uncaught, unspecified "error" event.');
  397. }
  398. }
  399. handler = this._events[type];
  400. if (isUndefined(handler))
  401. return false;
  402. if (isFunction(handler)) {
  403. switch (arguments.length) {
  404. // fast cases
  405. case 1:
  406. handler.call(this);
  407. break;
  408. case 2:
  409. handler.call(this, arguments[1]);
  410. break;
  411. case 3:
  412. handler.call(this, arguments[1], arguments[2]);
  413. break;
  414. // slower
  415. default:
  416. len = arguments.length;
  417. args = new Array(len - 1);
  418. for (i = 1; i < len; i++)
  419. args[i - 1] = arguments[i];
  420. handler.apply(this, args);
  421. }
  422. } else if (isObject(handler)) {
  423. len = arguments.length;
  424. args = new Array(len - 1);
  425. for (i = 1; i < len; i++)
  426. args[i - 1] = arguments[i];
  427. listeners = handler.slice();
  428. len = listeners.length;
  429. for (i = 0; i < len; i++)
  430. listeners[i].apply(this, args);
  431. }
  432. return true;
  433. };
  434. EventEmitter.prototype.addListener = function(type, listener) {
  435. var m;
  436. if (!isFunction(listener))
  437. throw TypeError('listener must be a function');
  438. if (!this._events)
  439. this._events = {};
  440. // To avoid recursion in the case that type === "newListener"! Before
  441. // adding it to the listeners, first emit "newListener".
  442. if (this._events.newListener)
  443. this.emit('newListener', type,
  444. isFunction(listener.listener) ?
  445. listener.listener : listener);
  446. if (!this._events[type])
  447. // Optimize the case of one listener. Don't need the extra array object.
  448. this._events[type] = listener;
  449. else if (isObject(this._events[type]))
  450. // If we've already got an array, just append.
  451. this._events[type].push(listener);
  452. else
  453. // Adding the second element, need to change to array.
  454. this._events[type] = [this._events[type], listener];
  455. // Check for listener leak
  456. if (isObject(this._events[type]) && !this._events[type].warned) {
  457. var m;
  458. if (!isUndefined(this._maxListeners)) {
  459. m = this._maxListeners;
  460. } else {
  461. m = EventEmitter.defaultMaxListeners;
  462. }
  463. if (m && m > 0 && this._events[type].length > m) {
  464. this._events[type].warned = true;
  465. console.error('(node) warning: possible EventEmitter memory ' +
  466. 'leak detected. %d listeners added. ' +
  467. 'Use emitter.setMaxListeners() to increase limit.',
  468. this._events[type].length);
  469. if (typeof console.trace === 'function') {
  470. // not supported in IE 10
  471. console.trace();
  472. }
  473. }
  474. }
  475. return this;
  476. };
  477. EventEmitter.prototype.on = EventEmitter.prototype.addListener;
  478. EventEmitter.prototype.once = function(type, listener) {
  479. if (!isFunction(listener))
  480. throw TypeError('listener must be a function');
  481. var fired = false;
  482. function g() {
  483. this.removeListener(type, g);
  484. if (!fired) {
  485. fired = true;
  486. listener.apply(this, arguments);
  487. }
  488. }
  489. g.listener = listener;
  490. this.on(type, g);
  491. return this;
  492. };
  493. // emits a 'removeListener' event iff the listener was removed
  494. EventEmitter.prototype.removeListener = function(type, listener) {
  495. var list, position, length, i;
  496. if (!isFunction(listener))
  497. throw TypeError('listener must be a function');
  498. if (!this._events || !this._events[type])
  499. return this;
  500. list = this._events[type];
  501. length = list.length;
  502. position = -1;
  503. if (list === listener ||
  504. (isFunction(list.listener) && list.listener === listener)) {
  505. delete this._events[type];
  506. if (this._events.removeListener)
  507. this.emit('removeListener', type, listener);
  508. } else if (isObject(list)) {
  509. for (i = length; i-- > 0;) {
  510. if (list[i] === listener ||
  511. (list[i].listener && list[i].listener === listener)) {
  512. position = i;
  513. break;
  514. }
  515. }
  516. if (position < 0)
  517. return this;
  518. if (list.length === 1) {
  519. list.length = 0;
  520. delete this._events[type];
  521. } else {
  522. list.splice(position, 1);
  523. }
  524. if (this._events.removeListener)
  525. this.emit('removeListener', type, listener);
  526. }
  527. return this;
  528. };
  529. EventEmitter.prototype.removeAllListeners = function(type) {
  530. var key, listeners;
  531. if (!this._events)
  532. return this;
  533. // not listening for removeListener, no need to emit
  534. if (!this._events.removeListener) {
  535. if (arguments.length === 0)
  536. this._events = {};
  537. else if (this._events[type])
  538. delete this._events[type];
  539. return this;
  540. }
  541. // emit removeListener for all listeners on all events
  542. if (arguments.length === 0) {
  543. for (key in this._events) {
  544. if (key === 'removeListener') continue;
  545. this.removeAllListeners(key);
  546. }
  547. this.removeAllListeners('removeListener');
  548. this._events = {};
  549. return this;
  550. }
  551. listeners = this._events[type];
  552. if (isFunction(listeners)) {
  553. this.removeListener(type, listeners);
  554. } else {
  555. // LIFO order
  556. while (listeners.length)
  557. this.removeListener(type, listeners[listeners.length - 1]);
  558. }
  559. delete this._events[type];
  560. return this;
  561. };
  562. EventEmitter.prototype.listeners = function(type) {
  563. var ret;
  564. if (!this._events || !this._events[type])
  565. ret = [];
  566. else if (isFunction(this._events[type]))
  567. ret = [this._events[type]];
  568. else
  569. ret = this._events[type].slice();
  570. return ret;
  571. };
  572. EventEmitter.listenerCount = function(emitter, type) {
  573. var ret;
  574. if (!emitter._events || !emitter._events[type])
  575. ret = 0;
  576. else if (isFunction(emitter._events[type]))
  577. ret = 1;
  578. else
  579. ret = emitter._events[type].length;
  580. return ret;
  581. };
  582. function isFunction(arg) {
  583. return typeof arg === 'function';
  584. }
  585. function isNumber(arg) {
  586. return typeof arg === 'number';
  587. }
  588. function isObject(arg) {
  589. return typeof arg === 'object' && arg !== null;
  590. }
  591. function isUndefined(arg) {
  592. return arg === void 0;
  593. }
  594. },{}],7:[function(require,module,exports){
  595. // shim for using process in browser
  596. var process = module.exports = {};
  597. var queue = [];
  598. var draining = false;
  599. function drainQueue() {
  600. if (draining) {
  601. return;
  602. }
  603. draining = true;
  604. var currentQueue;
  605. var len = queue.length;
  606. while(len) {
  607. currentQueue = queue;
  608. queue = [];
  609. var i = -1;
  610. while (++i < len) {
  611. currentQueue[i]();
  612. }
  613. len = queue.length;
  614. }
  615. draining = false;
  616. }
  617. process.nextTick = function (fun) {
  618. queue.push(fun);
  619. if (!draining) {
  620. setTimeout(drainQueue, 0);
  621. }
  622. };
  623. process.title = 'browser';
  624. process.browser = true;
  625. process.env = {};
  626. process.argv = [];
  627. process.version = ''; // empty string to avoid regexp issues
  628. process.versions = {};
  629. function noop() {}
  630. process.on = noop;
  631. process.addListener = noop;
  632. process.once = noop;
  633. process.off = noop;
  634. process.removeListener = noop;
  635. process.removeAllListeners = noop;
  636. process.emit = noop;
  637. process.binding = function (name) {
  638. throw new Error('process.binding is not supported');
  639. };
  640. // TODO(shtylman)
  641. process.cwd = function () { return '/' };
  642. process.chdir = function (dir) {
  643. throw new Error('process.chdir is not supported');
  644. };
  645. process.umask = function() { return 0; };
  646. },{}],8:[function(require,module,exports){
  647. if (typeof Object.create === 'function') {
  648. // implementation from standard node.js 'util' module
  649. module.exports = function inherits(ctor, superCtor) {
  650. ctor.super_ = superCtor
  651. ctor.prototype = Object.create(superCtor.prototype, {
  652. constructor: {
  653. value: ctor,
  654. enumerable: false,
  655. writable: true,
  656. configurable: true
  657. }
  658. });
  659. };
  660. } else {
  661. // old school shim for old browsers
  662. module.exports = function inherits(ctor, superCtor) {
  663. ctor.super_ = superCtor
  664. var TempCtor = function () {}
  665. TempCtor.prototype = superCtor.prototype
  666. ctor.prototype = new TempCtor()
  667. ctor.prototype.constructor = ctor
  668. }
  669. }
  670. },{}],9:[function(require,module,exports){
  671. module.exports = function isBuffer(arg) {
  672. return arg && typeof arg === 'object'
  673. && typeof arg.copy === 'function'
  674. && typeof arg.fill === 'function'
  675. && typeof arg.readUInt8 === 'function';
  676. }
  677. },{}],10:[function(require,module,exports){
  678. (function (process,global){
  679. // Copyright Joyent, Inc. and other Node contributors.
  680. //
  681. // Permission is hereby granted, free of charge, to any person obtaining a
  682. // copy of this software and associated documentation files (the
  683. // "Software"), to deal in the Software without restriction, including
  684. // without limitation the rights to use, copy, modify, merge, publish,
  685. // distribute, sublicense, and/or sell copies of the Software, and to permit
  686. // persons to whom the Software is furnished to do so, subject to the
  687. // following conditions:
  688. //
  689. // The above copyright notice and this permission notice shall be included
  690. // in all copies or substantial portions of the Software.
  691. //
  692. // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  693. // OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  694. // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
  695. // NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
  696. // DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  697. // OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  698. // USE OR OTHER DEALINGS IN THE SOFTWARE.
  699. var formatRegExp = /%[sdj%]/g;
  700. exports.format = function(f) {
  701. if (!isString(f)) {
  702. var objects = [];
  703. for (var i = 0; i < arguments.length; i++) {
  704. objects.push(inspect(arguments[i]));
  705. }
  706. return objects.join(' ');
  707. }
  708. var i = 1;
  709. var args = arguments;
  710. var len = args.length;
  711. var str = String(f).replace(formatRegExp, function(x) {
  712. if (x === '%%') return '%';
  713. if (i >= len) return x;
  714. switch (x) {
  715. case '%s': return String(args[i++]);
  716. case '%d': return Number(args[i++]);
  717. case '%j':
  718. try {
  719. return JSON.stringify(args[i++]);
  720. } catch (_) {
  721. return '[Circular]';
  722. }
  723. default:
  724. return x;
  725. }
  726. });
  727. for (var x = args[i]; i < len; x = args[++i]) {
  728. if (isNull(x) || !isObject(x)) {
  729. str += ' ' + x;
  730. } else {
  731. str += ' ' + inspect(x);
  732. }
  733. }
  734. return str;
  735. };
  736. // Mark that a method should not be used.
  737. // Returns a modified function which warns once by default.
  738. // If --no-deprecation is set, then it is a no-op.
  739. exports.deprecate = function(fn, msg) {
  740. // Allow for deprecating things in the process of starting up.
  741. if (isUndefined(global.process)) {
  742. return function() {
  743. return exports.deprecate(fn, msg).apply(this, arguments);
  744. };
  745. }
  746. if (process.noDeprecation === true) {
  747. return fn;
  748. }
  749. var warned = false;
  750. function deprecated() {
  751. if (!warned) {
  752. if (process.throwDeprecation) {
  753. throw new Error(msg);
  754. } else if (process.traceDeprecation) {
  755. console.trace(msg);
  756. } else {
  757. console.error(msg);
  758. }
  759. warned = true;
  760. }
  761. return fn.apply(this, arguments);
  762. }
  763. return deprecated;
  764. };
  765. var debugs = {};
  766. var debugEnviron;
  767. exports.debuglog = function(set) {
  768. if (isUndefined(debugEnviron))
  769. debugEnviron = process.env.NODE_DEBUG || '';
  770. set = set.toUpperCase();
  771. if (!debugs[set]) {
  772. if (new RegExp('\\b' + set + '\\b', 'i').test(debugEnviron)) {
  773. var pid = process.pid;
  774. debugs[set] = function() {
  775. var msg = exports.format.apply(exports, arguments);
  776. console.error('%s %d: %s', set, pid, msg);
  777. };
  778. } else {
  779. debugs[set] = function() {};
  780. }
  781. }
  782. return debugs[set];
  783. };
  784. /**
  785. * Echos the value of a value. Trys to print the value out
  786. * in the best way possible given the different types.
  787. *
  788. * @param {Object} obj The object to print out.
  789. * @param {Object} opts Optional options object that alters the output.
  790. */
  791. /* legacy: obj, showHidden, depth, colors*/
  792. function inspect(obj, opts) {
  793. // default options
  794. var ctx = {
  795. seen: [],
  796. stylize: stylizeNoColor
  797. };
  798. // legacy...
  799. if (arguments.length >= 3) ctx.depth = arguments[2];
  800. if (arguments.length >= 4) ctx.colors = arguments[3];
  801. if (isBoolean(opts)) {
  802. // legacy...
  803. ctx.showHidden = opts;
  804. } else if (opts) {
  805. // got an "options" object
  806. exports._extend(ctx, opts);
  807. }
  808. // set default options
  809. if (isUndefined(ctx.showHidden)) ctx.showHidden = false;
  810. if (isUndefined(ctx.depth)) ctx.depth = 2;
  811. if (isUndefined(ctx.colors)) ctx.colors = false;
  812. if (isUndefined(ctx.customInspect)) ctx.customInspect = true;
  813. if (ctx.colors) ctx.stylize = stylizeWithColor;
  814. return formatValue(ctx, obj, ctx.depth);
  815. }
  816. exports.inspect = inspect;
  817. // http://en.wikipedia.org/wiki/ANSI_escape_code#graphics
  818. inspect.colors = {
  819. 'bold' : [1, 22],
  820. 'italic' : [3, 23],
  821. 'underline' : [4, 24],
  822. 'inverse' : [7, 27],
  823. 'white' : [37, 39],
  824. 'grey' : [90, 39],
  825. 'black' : [30, 39],
  826. 'blue' : [34, 39],
  827. 'cyan' : [36, 39],
  828. 'green' : [32, 39],
  829. 'magenta' : [35, 39],
  830. 'red' : [31, 39],
  831. 'yellow' : [33, 39]
  832. };
  833. // Don't use 'blue' not visible on cmd.exe
  834. inspect.styles = {
  835. 'special': 'cyan',
  836. 'number': 'yellow',
  837. 'boolean': 'yellow',
  838. 'undefined': 'grey',
  839. 'null': 'bold',
  840. 'string': 'green',
  841. 'date': 'magenta',
  842. // "name": intentionally not styling
  843. 'regexp': 'red'
  844. };
  845. function stylizeWithColor(str, styleType) {
  846. var style = inspect.styles[styleType];
  847. if (style) {
  848. return '\u001b[' + inspect.colors[style][0] + 'm' + str +
  849. '\u001b[' + inspect.colors[style][1] + 'm';
  850. } else {
  851. return str;
  852. }
  853. }
  854. function stylizeNoColor(str, styleType) {
  855. return str;
  856. }
  857. function arrayToHash(array) {
  858. var hash = {};
  859. array.forEach(function(val, idx) {
  860. hash[val] = true;
  861. });
  862. return hash;
  863. }
  864. function formatValue(ctx, value, recurseTimes) {
  865. // Provide a hook for user-specified inspect functions.
  866. // Check that value is an object with an inspect function on it
  867. if (ctx.customInspect &&
  868. value &&
  869. isFunction(value.inspect) &&
  870. // Filter out the util module, it's inspect function is special
  871. value.inspect !== exports.inspect &&
  872. // Also filter out any prototype objects using the circular check.
  873. !(value.constructor && value.constructor.prototype === value)) {
  874. var ret = value.inspect(recurseTimes, ctx);
  875. if (!isString(ret)) {
  876. ret = formatValue(ctx, ret, recurseTimes);
  877. }
  878. return ret;
  879. }
  880. // Primitive types cannot have properties
  881. var primitive = formatPrimitive(ctx, value);
  882. if (primitive) {
  883. return primitive;
  884. }
  885. // Look up the keys of the object.
  886. var keys = Object.keys(value);
  887. var visibleKeys = arrayToHash(keys);
  888. if (ctx.showHidden) {
  889. keys = Object.getOwnPropertyNames(value);
  890. }
  891. // IE doesn't make error fields non-enumerable
  892. // http://msdn.microsoft.com/en-us/library/ie/dww52sbt(v=vs.94).aspx
  893. if (isError(value)
  894. && (keys.indexOf('message') >= 0 || keys.indexOf('description') >= 0)) {
  895. return formatError(value);
  896. }
  897. // Some type of object without properties can be shortcutted.
  898. if (keys.length === 0) {
  899. if (isFunction(value)) {
  900. var name = value.name ? ': ' + value.name : '';
  901. return ctx.stylize('[Function' + name + ']', 'special');
  902. }
  903. if (isRegExp(value)) {
  904. return ctx.stylize(RegExp.prototype.toString.call(value), 'regexp');
  905. }
  906. if (isDate(value)) {
  907. return ctx.stylize(Date.prototype.toString.call(value), 'date');
  908. }
  909. if (isError(value)) {
  910. return formatError(value);
  911. }
  912. }
  913. var base = '', array = false, braces = ['{', '}'];
  914. // Make Array say that they are Array
  915. if (isArray(value)) {
  916. array = true;
  917. braces = ['[', ']'];
  918. }
  919. // Make functions say that they are functions
  920. if (isFunction(value)) {
  921. var n = value.name ? ': ' + value.name : '';
  922. base = ' [Function' + n + ']';
  923. }
  924. // Make RegExps say that they are RegExps
  925. if (isRegExp(value)) {
  926. base = ' ' + RegExp.prototype.toString.call(value);
  927. }
  928. // Make dates with properties first say the date
  929. if (isDate(value)) {
  930. base = ' ' + Date.prototype.toUTCString.call(value);
  931. }
  932. // Make error with message first say the error
  933. if (isError(value)) {
  934. base = ' ' + formatError(value);
  935. }
  936. if (keys.length === 0 && (!array || value.length == 0)) {
  937. return braces[0] + base + braces[1];
  938. }
  939. if (recurseTimes < 0) {
  940. if (isRegExp(value)) {
  941. return ctx.stylize(RegExp.prototype.toString.call(value), 'regexp');
  942. } else {
  943. return ctx.stylize('[Object]', 'special');
  944. }
  945. }
  946. ctx.seen.push(value);
  947. var output;
  948. if (array) {
  949. output = formatArray(ctx, value, recurseTimes, visibleKeys, keys);
  950. } else {
  951. output = keys.map(function(key) {
  952. return formatProperty(ctx, value, recurseTimes, visibleKeys, key, array);
  953. });
  954. }
  955. ctx.seen.pop();
  956. return reduceToSingleString(output, base, braces);
  957. }
  958. function formatPrimitive(ctx, value) {
  959. if (isUndefined(value))
  960. return ctx.stylize('undefined', 'undefined');
  961. if (isString(value)) {
  962. var simple = '\'' + JSON.stringify(value).replace(/^"|"$/g, '')
  963. .replace(/'/g, "\\'")
  964. .replace(/\\"/g, '"') + '\'';
  965. return ctx.stylize(simple, 'string');
  966. }
  967. if (isNumber(value))
  968. return ctx.stylize('' + value, 'number');
  969. if (isBoolean(value))
  970. return ctx.stylize('' + value, 'boolean');
  971. // For some reason typeof null is "object", so special case here.
  972. if (isNull(value))
  973. return ctx.stylize('null', 'null');
  974. }
  975. function formatError(value) {
  976. return '[' + Error.prototype.toString.call(value) + ']';
  977. }
  978. function formatArray(ctx, value, recurseTimes, visibleKeys, keys) {
  979. var output = [];
  980. for (var i = 0, l = value.length; i < l; ++i) {
  981. if (hasOwnProperty(value, String(i))) {
  982. output.push(formatProperty(ctx, value, recurseTimes, visibleKeys,
  983. String(i), true));
  984. } else {
  985. output.push('');
  986. }
  987. }
  988. keys.forEach(function(key) {
  989. if (!key.match(/^\d+$/)) {
  990. output.push(formatProperty(ctx, value, recurseTimes, visibleKeys,
  991. key, true));
  992. }
  993. });
  994. return output;
  995. }
  996. function formatProperty(ctx, value, recurseTimes, visibleKeys, key, array) {
  997. var name, str, desc;
  998. desc = Object.getOwnPropertyDescriptor(value, key) || { value: value[key] };
  999. if (desc.get) {
  1000. if (desc.set) {
  1001. str = ctx.stylize('[Getter/Setter]', 'special');
  1002. } else {
  1003. str = ctx.stylize('[Getter]', 'special');
  1004. }
  1005. } else {
  1006. if (desc.set) {
  1007. str = ctx.stylize('[Setter]', 'special');
  1008. }
  1009. }
  1010. if (!hasOwnProperty(visibleKeys, key)) {
  1011. name = '[' + key + ']';
  1012. }
  1013. if (!str) {
  1014. if (ctx.seen.indexOf(desc.value) < 0) {
  1015. if (isNull(recurseTimes)) {
  1016. str = formatValue(ctx, desc.value, null);
  1017. } else {
  1018. str = formatValue(ctx, desc.value, recurseTimes - 1);
  1019. }
  1020. if (str.indexOf('\n') > -1) {
  1021. if (array) {
  1022. str = str.split('\n').map(function(line) {
  1023. return ' ' + line;
  1024. }).join('\n').substr(2);
  1025. } else {
  1026. str = '\n' + str.split('\n').map(function(line) {
  1027. return ' ' + line;
  1028. }).join('\n');
  1029. }
  1030. }
  1031. } else {
  1032. str = ctx.stylize('[Circular]', 'special');
  1033. }
  1034. }
  1035. if (isUndefined(name)) {
  1036. if (array && key.match(/^\d+$/)) {
  1037. return str;
  1038. }
  1039. name = JSON.stringify('' + key);
  1040. if (name.match(/^"([a-zA-Z_][a-zA-Z_0-9]*)"$/)) {
  1041. name = name.substr(1, name.length - 2);
  1042. name = ctx.stylize(name, 'name');
  1043. } else {
  1044. name = name.replace(/'/g, "\\'")
  1045. .replace(/\\"/g, '"')
  1046. .replace(/(^"|"$)/g, "'");
  1047. name = ctx.stylize(name, 'string');
  1048. }
  1049. }
  1050. return name + ': ' + str;
  1051. }
  1052. function reduceToSingleString(output, base, braces) {
  1053. var numLinesEst = 0;
  1054. var length = output.reduce(function(prev, cur) {
  1055. numLinesEst++;
  1056. if (cur.indexOf('\n') >= 0) numLinesEst++;
  1057. return prev + cur.replace(/\u001b\[\d\d?m/g, '').length + 1;
  1058. }, 0);
  1059. if (length > 60) {
  1060. return braces[0] +
  1061. (base === '' ? '' : base + '\n ') +
  1062. ' ' +
  1063. output.join(',\n ') +
  1064. ' ' +
  1065. braces[1];
  1066. }
  1067. return braces[0] + base + ' ' + output.join(', ') + ' ' + braces[1];
  1068. }
  1069. // NOTE: These type checking functions intentionally don't use `instanceof`
  1070. // because it is fragile and can be easily faked with `Object.create()`.
  1071. function isArray(ar) {
  1072. return Array.isArray(ar);
  1073. }
  1074. exports.isArray = isArray;
  1075. function isBoolean(arg) {
  1076. return typeof arg === 'boolean';
  1077. }
  1078. exports.isBoolean = isBoolean;
  1079. function isNull(arg) {
  1080. return arg === null;
  1081. }
  1082. exports.isNull = isNull;
  1083. function isNullOrUndefined(arg) {
  1084. return arg == null;
  1085. }
  1086. exports.isNullOrUndefined = isNullOrUndefined;
  1087. function isNumber(arg) {
  1088. return typeof arg === 'number';
  1089. }
  1090. exports.isNumber = isNumber;
  1091. function isString(arg) {
  1092. return typeof arg === 'string';
  1093. }
  1094. exports.isString = isString;
  1095. function isSymbol(arg) {
  1096. return typeof arg === 'symbol';
  1097. }
  1098. exports.isSymbol = isSymbol;
  1099. function isUndefined(arg) {
  1100. return arg === void 0;
  1101. }
  1102. exports.isUndefined = isUndefined;
  1103. function isRegExp(re) {
  1104. return isObject(re) && objectToString(re) === '[object RegExp]';
  1105. }
  1106. exports.isRegExp = isRegExp;
  1107. function isObject(arg) {
  1108. return typeof arg === 'object' && arg !== null;
  1109. }
  1110. exports.isObject = isObject;
  1111. function isDate(d) {
  1112. return isObject(d) && objectToString(d) === '[object Date]';
  1113. }
  1114. exports.isDate = isDate;
  1115. function isError(e) {
  1116. return isObject(e) &&
  1117. (objectToString(e) === '[object Error]' || e instanceof Error);
  1118. }
  1119. exports.isError = isError;
  1120. function isFunction(arg) {
  1121. return typeof arg === 'function';
  1122. }
  1123. exports.isFunction = isFunction;
  1124. function isPrimitive(arg) {
  1125. return arg === null ||
  1126. typeof arg === 'boolean' ||
  1127. typeof arg === 'number' ||
  1128. typeof arg === 'string' ||
  1129. typeof arg === 'symbol' || // ES6 symbol
  1130. typeof arg === 'undefined';
  1131. }
  1132. exports.isPrimitive = isPrimitive;
  1133. exports.isBuffer = require('./support/isBuffer');
  1134. function objectToString(o) {
  1135. return Object.prototype.toString.call(o);
  1136. }
  1137. function pad(n) {
  1138. return n < 10 ? '0' + n.toString(10) : n.toString(10);
  1139. }
  1140. var months = ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep',
  1141. 'Oct', 'Nov', 'Dec'];
  1142. // 26 Feb 16:19:34
  1143. function timestamp() {
  1144. var d = new Date();
  1145. var time = [pad(d.getHours()),
  1146. pad(d.getMinutes()),
  1147. pad(d.getSeconds())].join(':');
  1148. return [d.getDate(), months[d.getMonth()], time].join(' ');
  1149. }
  1150. // log is just a thin wrapper to console.log that prepends a timestamp
  1151. exports.log = function() {
  1152. console.log('%s - %s', timestamp(), exports.format.apply(exports, arguments));
  1153. };
  1154. /**
  1155. * Inherit the prototype methods from one constructor into another.
  1156. *
  1157. * The Function.prototype.inherits from lang.js rewritten as a standalone
  1158. * function (not on Function.prototype). NOTE: If this file is to be loaded
  1159. * during bootstrapping this function needs to be rewritten using some native
  1160. * functions as prototype setup using normal JavaScript does not work as
  1161. * expected during bootstrapping (see mirror.js in r114903).
  1162. *
  1163. * @param {function} ctor Constructor function which needs to inherit the
  1164. * prototype.
  1165. * @param {function} superCtor Constructor function to inherit prototype from.
  1166. */
  1167. exports.inherits = require('inherits');
  1168. exports._extend = function(origin, add) {
  1169. // Don't do anything if add isn't an object
  1170. if (!add || !isObject(add)) return origin;
  1171. var keys = Object.keys(add);
  1172. var i = keys.length;
  1173. while (i--) {
  1174. origin[keys[i]] = add[keys[i]];
  1175. }
  1176. return origin;
  1177. };
  1178. function hasOwnProperty(obj, prop) {
  1179. return Object.prototype.hasOwnProperty.call(obj, prop);
  1180. }
  1181. }).call(this,require('_process'),typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
  1182. },{"./support/isBuffer":9,"_process":7,"inherits":8}],11:[function(require,module,exports){
  1183. (function (global){
  1184. /*global window, global*/
  1185. var util = require("util")
  1186. var assert = require("assert")
  1187. var now = require("date-now")
  1188. var slice = Array.prototype.slice
  1189. var console
  1190. var times = {}
  1191. if (typeof global !== "undefined" && global.console) {
  1192. console = global.console
  1193. } else if (typeof window !== "undefined" && window.console) {
  1194. console = window.console
  1195. } else {
  1196. console = {}
  1197. }
  1198. var functions = [
  1199. [log, "log"],
  1200. [info, "info"],
  1201. [warn, "warn"],
  1202. [error, "error"],
  1203. [time, "time"],
  1204. [timeEnd, "timeEnd"],
  1205. [trace, "trace"],
  1206. [dir, "dir"],
  1207. [consoleAssert, "assert"]
  1208. ]
  1209. for (var i = 0; i < functions.length; i++) {
  1210. var tuple = functions[i]
  1211. var f = tuple[0]
  1212. var name = tuple[1]
  1213. if (!console[name]) {
  1214. console[name] = f
  1215. }
  1216. }
  1217. module.exports = console
  1218. function log() {}
  1219. function info() {
  1220. console.log.apply(console, arguments)
  1221. }
  1222. function warn() {
  1223. console.log.apply(console, arguments)
  1224. }
  1225. function error() {
  1226. console.warn.apply(console, arguments)
  1227. }
  1228. function time(label) {
  1229. times[label] = now()
  1230. }
  1231. function timeEnd(label) {
  1232. var time = times[label]
  1233. if (!time) {
  1234. throw new Error("No such label: " + label)
  1235. }
  1236. var duration = now() - time
  1237. console.log(label + ": " + duration + "ms")
  1238. }
  1239. function trace() {
  1240. var err = new Error()
  1241. err.name = "Trace"
  1242. err.message = util.format.apply(null, arguments)
  1243. console.error(err.stack)
  1244. }
  1245. function dir(object) {
  1246. console.log(util.inspect(object) + "\n")
  1247. }
  1248. function consoleAssert(expression) {
  1249. if (!expression) {
  1250. var arr = slice.call(arguments, 1)
  1251. assert.ok(false, util.format.apply(null, arr))
  1252. }
  1253. }
  1254. }).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
  1255. },{"assert":5,"date-now":12,"util":10}],12:[function(require,module,exports){
  1256. module.exports = now
  1257. function now() {
  1258. return new Date().getTime()
  1259. }
  1260. },{}],13:[function(require,module,exports){
  1261. (function (global){
  1262. /**
  1263. * @license
  1264. * Lodash <https://lodash.com/>
  1265. * Copyright JS Foundation and other contributors <https://js.foundation/>
  1266. * Released under MIT license <https://lodash.com/license>
  1267. * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
  1268. * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
  1269. */
  1270. ;(function() {
  1271. /** Used as a safe reference for `undefined` in pre-ES5 environments. */
  1272. var undefined;
  1273. /** Used as the semantic version number. */
  1274. var VERSION = '4.17.10';
  1275. /** Used as the size to enable large array optimizations. */
  1276. var LARGE_ARRAY_SIZE = 200;
  1277. /** Error message constants. */
  1278. var CORE_ERROR_TEXT = 'Unsupported core-js use. Try https://npms.io/search?q=ponyfill.',
  1279. FUNC_ERROR_TEXT = 'Expected a function';
  1280. /** Used to stand-in for `undefined` hash values. */
  1281. var HASH_UNDEFINED = '__lodash_hash_undefined__';
  1282. /** Used as the maximum memoize cache size. */
  1283. var MAX_MEMOIZE_SIZE = 500;
  1284. /** Used as the internal argument placeholder. */
  1285. var PLACEHOLDER = '__lodash_placeholder__';
  1286. /** Used to compose bitmasks for cloning. */
  1287. var CLONE_DEEP_FLAG = 1,
  1288. CLONE_FLAT_FLAG = 2,
  1289. CLONE_SYMBOLS_FLAG = 4;
  1290. /** Used to compose bitmasks for value comparisons. */
  1291. var COMPARE_PARTIAL_FLAG = 1,
  1292. COMPARE_UNORDERED_FLAG = 2;
  1293. /** Used to compose bitmasks for function metadata. */
  1294. var WRAP_BIND_FLAG = 1,
  1295. WRAP_BIND_KEY_FLAG = 2,
  1296. WRAP_CURRY_BOUND_FLAG = 4,
  1297. WRAP_CURRY_FLAG = 8,
  1298. WRAP_CURRY_RIGHT_FLAG = 16,
  1299. WRAP_PARTIAL_FLAG = 32,
  1300. WRAP_PARTIAL_RIGHT_FLAG = 64,
  1301. WRAP_ARY_FLAG = 128,
  1302. WRAP_REARG_FLAG = 256,
  1303. WRAP_FLIP_FLAG = 512;
  1304. /** Used as default options for `_.truncate`. */
  1305. var DEFAULT_TRUNC_LENGTH = 30,
  1306. DEFAULT_TRUNC_OMISSION = '...';
  1307. /** Used to detect hot functions by number of calls within a span of milliseconds. */
  1308. var HOT_COUNT = 800,
  1309. HOT_SPAN = 16;
  1310. /** Used to indicate the type of lazy iteratees. */
  1311. var LAZY_FILTER_FLAG = 1,
  1312. LAZY_MAP_FLAG = 2,
  1313. LAZY_WHILE_FLAG = 3;
  1314. /** Used as references for various `Number` constants. */
  1315. var INFINITY = 1 / 0,
  1316. MAX_SAFE_INTEGER = 9007199254740991,
  1317. MAX_INTEGER = 1.7976931348623157e+308,
  1318. NAN = 0 / 0;
  1319. /** Used as references for the maximum length and index of an array. */
  1320. var MAX_ARRAY_LENGTH = 4294967295,
  1321. MAX_ARRAY_INDEX = MAX_ARRAY_LENGTH - 1,
  1322. HALF_MAX_ARRAY_LENGTH = MAX_ARRAY_LENGTH >>> 1;
  1323. /** Used to associate wrap methods with their bit flags. */
  1324. var wrapFlags = [
  1325. ['ary', WRAP_ARY_FLAG],
  1326. ['bind', WRAP_BIND_FLAG],
  1327. ['bindKey', WRAP_BIND_KEY_FLAG],
  1328. ['curry', WRAP_CURRY_FLAG],
  1329. ['curryRight', WRAP_CURRY_RIGHT_FLAG],
  1330. ['flip', WRAP_FLIP_FLAG],
  1331. ['partial', WRAP_PARTIAL_FLAG],
  1332. ['partialRight', WRAP_PARTIAL_RIGHT_FLAG],
  1333. ['rearg', WRAP_REARG_FLAG]
  1334. ];
  1335. /** `Object#toString` result references. */
  1336. var argsTag = '[object Arguments]',
  1337. arrayTag = '[object Array]',
  1338. asyncTag = '[object AsyncFunction]',
  1339. boolTag = '[object Boolean]',
  1340. dateTag = '[object Date]',
  1341. domExcTag = '[object DOMException]',
  1342. errorTag = '[object Error]',
  1343. funcTag = '[object Function]',
  1344. genTag = '[object GeneratorFunction]',
  1345. mapTag = '[object Map]',
  1346. numberTag = '[object Number]',
  1347. nullTag = '[object Null]',
  1348. objectTag = '[object Object]',
  1349. promiseTag = '[object Promise]',
  1350. proxyTag = '[object Proxy]',
  1351. regexpTag = '[object RegExp]',
  1352. setTag = '[object Set]',
  1353. stringTag = '[object String]',
  1354. symbolTag = '[object Symbol]',
  1355. undefinedTag = '[object Undefined]',
  1356. weakMapTag = '[object WeakMap]',
  1357. weakSetTag = '[object WeakSet]';
  1358. var arrayBufferTag = '[object ArrayBuffer]',
  1359. dataViewTag = '[object DataView]',
  1360. float32Tag = '[object Float32Array]',
  1361. float64Tag = '[object Float64Array]',
  1362. int8Tag = '[object Int8Array]',
  1363. int16Tag = '[object Int16Array]',
  1364. int32Tag = '[object Int32Array]',
  1365. uint8Tag = '[object Uint8Array]',
  1366. uint8ClampedTag = '[object Uint8ClampedArray]',
  1367. uint16Tag = '[object Uint16Array]',
  1368. uint32Tag = '[object Uint32Array]';
  1369. /** Used to match empty string literals in compiled template source. */
  1370. var reEmptyStringLeading = /\b__p \+= '';/g,
  1371. reEmptyStringMiddle = /\b(__p \+=) '' \+/g,
  1372. reEmptyStringTrailing = /(__e\(.*?\)|\b__t\)) \+\n'';/g;
  1373. /** Used to match HTML entities and HTML characters. */
  1374. var reEscapedHtml = /&(?:amp|lt|gt|quot|#39);/g,
  1375. reUnescapedHtml = /[&<>"']/g,
  1376. reHasEscapedHtml = RegExp(reEscapedHtml.source),
  1377. reHasUnescapedHtml = RegExp(reUnescapedHtml.source);
  1378. /** Used to match template delimiters. */
  1379. var reEscape = /<%-([\s\S]+?)%>/g,
  1380. reEvaluate = /<%([\s\S]+?)%>/g,
  1381. reInterpolate = /<%=([\s\S]+?)%>/g;
  1382. /** Used to match property names within property paths. */
  1383. var reIsDeepProp = /\.|\[(?:[^[\]]*|(["'])(?:(?!\1)[^\\]|\\.)*?\1)\]/,
  1384. reIsPlainProp = /^\w*$/,
  1385. rePropName = /[^.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\\]|\\.)*?)\2)\]|(?=(?:\.|\[\])(?:\.|\[\]|$))/g;
  1386. /**
  1387. * Used to match `RegExp`
  1388. * [syntax characters](http://ecma-international.org/ecma-262/7.0/#sec-patterns).
  1389. */
  1390. var reRegExpChar = /[\\^$.*+?()[\]{}|]/g,
  1391. reHasRegExpChar = RegExp(reRegExpChar.source);
  1392. /** Used to match leading and trailing whitespace. */
  1393. var reTrim = /^\s+|\s+$/g,
  1394. reTrimStart = /^\s+/,
  1395. reTrimEnd = /\s+$/;
  1396. /** Used to match wrap detail comments. */
  1397. var reWrapComment = /\{(?:\n\/\* \[wrapped with .+\] \*\/)?\n?/,
  1398. reWrapDetails = /\{\n\/\* \[wrapped with (.+)\] \*/,
  1399. reSplitDetails = /,? & /;
  1400. /** Used to match words composed of alphanumeric characters. */
  1401. var reAsciiWord = /[^\x00-\x2f\x3a-\x40\x5b-\x60\x7b-\x7f]+/g;
  1402. /** Used to match backslashes in property paths. */
  1403. var reEscapeChar = /\\(\\)?/g;
  1404. /**
  1405. * Used to match
  1406. * [ES template delimiters](http://ecma-international.org/ecma-262/7.0/#sec-template-literal-lexical-components).
  1407. */
  1408. var reEsTemplate = /\$\{([^\\}]*(?:\\.[^\\}]*)*)\}/g;
  1409. /** Used to match `RegExp` flags from their coerced string values. */
  1410. var reFlags = /\w*$/;
  1411. /** Used to detect bad signed hexadecimal string values. */
  1412. var reIsBadHex = /^[-+]0x[0-9a-f]+$/i;
  1413. /** Used to detect binary string values. */
  1414. var reIsBinary = /^0b[01]+$/i;
  1415. /** Used to detect host constructors (Safari). */
  1416. var reIsHostCtor = /^\[object .+?Constructor\]$/;
  1417. /** Used to detect octal string values. */
  1418. var reIsOctal = /^0o[0-7]+$/i;
  1419. /** Used to detect unsigned integer values. */
  1420. var reIsUint = /^(?:0|[1-9]\d*)$/;
  1421. /** Used to match Latin Unicode letters (excluding mathematical operators). */
  1422. var reLatin = /[\xc0-\xd6\xd8-\xf6\xf8-\xff\u0100-\u017f]/g;
  1423. /** Used to ensure capturing order of template delimiters. */
  1424. var reNoMatch = /($^)/;
  1425. /** Used to match unescaped characters in compiled string literals. */
  1426. var reUnescapedString = /['\n\r\u2028\u2029\\]/g;
  1427. /** Used to compose unicode character classes. */
  1428. var rsAstralRange = '\\ud800-\\udfff',
  1429. rsComboMarksRange = '\\u0300-\\u036f',
  1430. reComboHalfMarksRange = '\\ufe20-\\ufe2f',
  1431. rsComboSymbolsRange = '\\u20d0-\\u20ff',
  1432. rsComboRange = rsComboMarksRange + reComboHalfMarksRange + rsComboSymbolsRange,
  1433. rsDingbatRange = '\\u2700-\\u27bf',
  1434. rsLowerRange = 'a-z\\xdf-\\xf6\\xf8-\\xff',
  1435. rsMathOpRange = '\\xac\\xb1\\xd7\\xf7',
  1436. rsNonCharRange = '\\x00-\\x2f\\x3a-\\x40\\x5b-\\x60\\x7b-\\xbf',
  1437. rsPunctuationRange = '\\u2000-\\u206f',
  1438. 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',
  1439. rsUpperRange = 'A-Z\\xc0-\\xd6\\xd8-\\xde',
  1440. rsVarRange = '\\ufe0e\\ufe0f',
  1441. rsBreakRange = rsMathOpRange + rsNonCharRange + rsPunctuationRange + rsSpaceRange;
  1442. /** Used to compose unicode capture groups. */
  1443. var rsApos = "['\u2019]",
  1444. rsAstral = '[' + rsAstralRange + ']',
  1445. rsBreak = '[' + rsBreakRange + ']',
  1446. rsCombo = '[' + rsComboRange + ']',
  1447. rsDigits = '\\d+',
  1448. rsDingbat = '[' + rsDingbatRange + ']',
  1449. rsLower = '[' + rsLowerRange + ']',
  1450. rsMisc = '[^' + rsAstralRange + rsBreakRange + rsDigits + rsDingbatRange + rsLowerRange + rsUpperRange + ']',
  1451. rsFitz = '\\ud83c[\\udffb-\\udfff]',
  1452. rsModifier = '(?:' + rsCombo + '|' + rsFitz + ')',
  1453. rsNonAstral = '[^' + rsAstralRange + ']',
  1454. rsRegional = '(?:\\ud83c[\\udde6-\\uddff]){2}',
  1455. rsSurrPair = '[\\ud800-\\udbff][\\udc00-\\udfff]',
  1456. rsUpper = '[' + rsUpperRange + ']',
  1457. rsZWJ = '\\u200d';
  1458. /** Used to compose unicode regexes. */
  1459. var rsMiscLower = '(?:' + rsLower + '|' + rsMisc + ')',
  1460. rsMiscUpper = '(?:' + rsUpper + '|' + rsMisc + ')',
  1461. rsOptContrLower = '(?:' + rsApos + '(?:d|ll|m|re|s|t|ve))?',
  1462. rsOptContrUpper = '(?:' + rsApos + '(?:D|LL|M|RE|S|T|VE))?',
  1463. reOptMod = rsModifier + '?',
  1464. rsOptVar = '[' + rsVarRange + ']?',
  1465. rsOptJoin = '(?:' + rsZWJ + '(?:' + [rsNonAstral, rsRegional, rsSurrPair].join('|') + ')' + rsOptVar + reOptMod + ')*',
  1466. rsOrdLower = '\\d*(?:1st|2nd|3rd|(?![123])\\dth)(?=\\b|[A-Z_])',
  1467. rsOrdUpper = '\\d*(?:1ST|2ND|3RD|(?![123])\\dTH)(?=\\b|[a-z_])',
  1468. rsSeq = rsOptVar + reOptMod + rsOptJoin,
  1469. rsEmoji = '(?:' + [rsDingbat, rsRegional, rsSurrPair].join('|') + ')' + rsSeq,
  1470. rsSymbol = '(?:' + [rsNonAstral + rsCombo + '?', rsCombo, rsRegional, rsSurrPair, rsAstral].join('|') + ')';
  1471. /** Used to match apostrophes. */
  1472. var reApos = RegExp(rsApos, 'g');
  1473. /**
  1474. * Used to match [combining diacritical marks](https://en.wikipedia.org/wiki/Combining_Diacritical_Marks) and
  1475. * [combining diacritical marks for symbols](https://en.wikipedia.org/wiki/Combining_Diacritical_Marks_for_Symbols).
  1476. */
  1477. var reComboMark = RegExp(rsCombo, 'g');
  1478. /** Used to match [string symbols](https://mathiasbynens.be/notes/javascript-unicode). */
  1479. var reUnicode = RegExp(rsFitz + '(?=' + rsFitz + ')|' + rsSymbol + rsSeq, 'g');
  1480. /** Used to match complex or compound words. */
  1481. var reUnicodeWord = RegExp([
  1482. rsUpper + '?' + rsLower + '+' + rsOptContrLower + '(?=' + [rsBreak, rsUpper, '$'].join('|') + ')',
  1483. rsMiscUpper + '+' + rsOptContrUpper + '(?=' + [rsBreak, rsUpper + rsMiscLower, '$'].join('|') + ')',
  1484. rsUpper + '?' + rsMiscLower + '+' + rsOptContrLower,
  1485. rsUpper + '+' + rsOptContrUpper,
  1486. rsOrdUpper,
  1487. rsOrdLower,
  1488. rsDigits,
  1489. rsEmoji
  1490. ].join('|'), 'g');
  1491. /** 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/). */
  1492. var reHasUnicode = RegExp('[' + rsZWJ + rsAstralRange + rsComboRange + rsVarRange + ']');
  1493. /** Used to detect strings that need a more robust regexp to match words. */
  1494. 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 ]/;
  1495. /** Used to assign default `context` object properties. */
  1496. var contextProps = [
  1497. 'Array', 'Buffer', 'DataView', 'Date', 'Error', 'Float32Array', 'Float64Array',
  1498. 'Function', 'Int8Array', 'Int16Array', 'Int32Array', 'Map', 'Math', 'Object',
  1499. 'Promise', 'RegExp', 'Set', 'String', 'Symbol', 'TypeError', 'Uint8Array',
  1500. 'Uint8ClampedArray', 'Uint16Array', 'Uint32Array', 'WeakMap',
  1501. '_', 'clearTimeout', 'isFinite', 'parseInt', 'setTimeout'
  1502. ];
  1503. /** Used to make template sourceURLs easier to identify. */
  1504. var templateCounter = -1;
  1505. /** Used to identify `toStringTag` values of typed arrays. */
  1506. var typedArrayTags = {};
  1507. typedArrayTags[float32Tag] = typedArrayTags[float64Tag] =
  1508. typedArrayTags[int8Tag] = typedArrayTags[int16Tag] =
  1509. typedArrayTags[int32Tag] = typedArrayTags[uint8Tag] =
  1510. typedArrayTags[uint8ClampedTag] = typedArrayTags[uint16Tag] =
  1511. typedArrayTags[uint32Tag] = true;
  1512. typedArrayTags[argsTag] = typedArrayTags[arrayTag] =
  1513. typedArrayTags[arrayBufferTag] = typedArrayTags[boolTag] =
  1514. typedArrayTags[dataViewTag] = typedArrayTags[dateTag] =
  1515. typedArrayTags[errorTag] = typedArrayTags[funcTag] =
  1516. typedArrayTags[mapTag] = typedArrayTags[numberTag] =
  1517. typedArrayTags[objectTag] = typedArrayTags[regexpTag] =
  1518. typedArrayTags[setTag] = typedArrayTags[stringTag] =
  1519. typedArrayTags[weakMapTag] = false;
  1520. /** Used to identify `toStringTag` values supported by `_.clone`. */
  1521. var cloneableTags = {};
  1522. cloneableTags[argsTag] = cloneableTags[arrayTag] =
  1523. cloneableTags[arrayBufferTag] = cloneableTags[dataViewTag] =
  1524. cloneableTags[boolTag] = cloneableTags[dateTag] =
  1525. cloneableTags[float32Tag] = cloneableTags[float64Tag] =
  1526. cloneableTags[int8Tag] = cloneableTags[int16Tag] =
  1527. cloneableTags[int32Tag] = cloneableTags[mapTag] =
  1528. cloneableTags[numberTag] = cloneableTags[objectTag] =
  1529. cloneableTags[regexpTag] = cloneableTags[setTag] =
  1530. cloneableTags[stringTag] = cloneableTags[symbolTag] =
  1531. cloneableTags[uint8Tag] = cloneableTags[uint8ClampedTag] =
  1532. cloneableTags[uint16Tag] = cloneableTags[uint32Tag] = true;
  1533. cloneableTags[errorTag] = cloneableTags[funcTag] =
  1534. cloneableTags[weakMapTag] = false;
  1535. /** Used to map Latin Unicode letters to basic Latin letters. */
  1536. var deburredLetters = {
  1537. // Latin-1 Supplement block.
  1538. '\xc0': 'A', '\xc1': 'A', '\xc2': 'A', '\xc3': 'A', '\xc4': 'A', '\xc5': 'A',
  1539. '\xe0': 'a', '\xe1': 'a', '\xe2': 'a', '\xe3': 'a', '\xe4': 'a', '\xe5': 'a',
  1540. '\xc7': 'C', '\xe7': 'c',
  1541. '\xd0': 'D', '\xf0': 'd',
  1542. '\xc8': 'E', '\xc9': 'E', '\xca': 'E', '\xcb': 'E',
  1543. '\xe8': 'e', '\xe9': 'e', '\xea': 'e', '\xeb': 'e',
  1544. '\xcc': 'I', '\xcd': 'I', '\xce': 'I', '\xcf': 'I',
  1545. '\xec': 'i', '\xed': 'i', '\xee': 'i', '\xef': 'i',
  1546. '\xd1': 'N', '\xf1': 'n',
  1547. '\xd2': 'O', '\xd3': 'O', '\xd4': 'O', '\xd5': 'O', '\xd6': 'O', '\xd8': 'O',
  1548. '\xf2': 'o', '\xf3': 'o', '\xf4': 'o', '\xf5': 'o', '\xf6': 'o', '\xf8': 'o',
  1549. '\xd9': 'U', '\xda': 'U', '\xdb': 'U', '\xdc': 'U',
  1550. '\xf9': 'u', '\xfa': 'u', '\xfb': 'u', '\xfc': 'u',
  1551. '\xdd': 'Y', '\xfd': 'y', '\xff': 'y',
  1552. '\xc6': 'Ae', '\xe6': 'ae',
  1553. '\xde': 'Th', '\xfe': 'th',
  1554. '\xdf': 'ss',
  1555. // Latin Extended-A block.
  1556. '\u0100': 'A', '\u0102': 'A', '\u0104': 'A',
  1557. '\u0101': 'a', '\u0103': 'a', '\u0105': 'a',
  1558. '\u0106': 'C', '\u0108': 'C', '\u010a': 'C', '\u010c': 'C',
  1559. '\u0107': 'c', '\u0109': 'c', '\u010b': 'c', '\u010d': 'c',
  1560. '\u010e': 'D', '\u0110': 'D', '\u010f': 'd', '\u0111': 'd',
  1561. '\u0112': 'E', '\u0114': 'E', '\u0116': 'E', '\u0118': 'E', '\u011a': 'E',
  1562. '\u0113': 'e', '\u0115': 'e', '\u0117': 'e', '\u0119': 'e', '\u011b': 'e',
  1563. '\u011c': 'G', '\u011e': 'G', '\u0120': 'G', '\u0122': 'G',
  1564. '\u011d': 'g', '\u011f': 'g', '\u0121': 'g', '\u0123': 'g',
  1565. '\u0124': 'H', '\u0126': 'H', '\u0125': 'h', '\u0127': 'h',
  1566. '\u0128': 'I', '\u012a': 'I', '\u012c': 'I', '\u012e': 'I', '\u0130': 'I',
  1567. '\u0129': 'i', '\u012b': 'i', '\u012d': 'i', '\u012f': 'i', '\u0131': 'i',
  1568. '\u0134': 'J', '\u0135': 'j',
  1569. '\u0136': 'K', '\u0137': 'k', '\u0138': 'k',
  1570. '\u0139': 'L', '\u013b': 'L', '\u013d': 'L', '\u013f': 'L', '\u0141': 'L',
  1571. '\u013a': 'l', '\u013c': 'l', '\u013e': 'l', '\u0140': 'l', '\u0142': 'l',
  1572. '\u0143': 'N', '\u0145': 'N', '\u0147': 'N', '\u014a': 'N',
  1573. '\u0144': 'n', '\u0146': 'n', '\u0148': 'n', '\u014b': 'n',
  1574. '\u014c': 'O', '\u014e': 'O', '\u0150': 'O',
  1575. '\u014d': 'o', '\u014f': 'o', '\u0151': 'o',
  1576. '\u0154': 'R', '\u0156': 'R', '\u0158': 'R',
  1577. '\u0155': 'r', '\u0157': 'r', '\u0159': 'r',
  1578. '\u015a': 'S', '\u015c': 'S', '\u015e': 'S', '\u0160': 'S',
  1579. '\u015b': 's', '\u015d': 's', '\u015f': 's', '\u0161': 's',
  1580. '\u0162': 'T', '\u0164': 'T', '\u0166': 'T',
  1581. '\u0163': 't', '\u0165': 't', '\u0167': 't',
  1582. '\u0168': 'U', '\u016a': 'U', '\u016c': 'U', '\u016e': 'U', '\u0170': 'U', '\u0172': 'U',
  1583. '\u0169': 'u', '\u016b': 'u', '\u016d': 'u', '\u016f': 'u', '\u0171': 'u', '\u0173': 'u',
  1584. '\u0174': 'W', '\u0175': 'w',
  1585. '\u0176': 'Y', '\u0177': 'y', '\u0178': 'Y',
  1586. '\u0179': 'Z', '\u017b': 'Z', '\u017d': 'Z',
  1587. '\u017a': 'z', '\u017c': 'z', '\u017e': 'z',
  1588. '\u0132': 'IJ', '\u0133': 'ij',
  1589. '\u0152': 'Oe', '\u0153': 'oe',
  1590. '\u0149': "'n", '\u017f': 's'
  1591. };
  1592. /** Used to map characters to HTML entities. */
  1593. var htmlEscapes = {
  1594. '&': '&amp;',
  1595. '<': '&lt;',
  1596. '>': '&gt;',
  1597. '"': '&quot;',
  1598. "'": '&#39;'
  1599. };
  1600. /** Used to map HTML entities to characters. */
  1601. var htmlUnescapes = {
  1602. '&amp;': '&',
  1603. '&lt;': '<',
  1604. '&gt;': '>',
  1605. '&quot;': '"',
  1606. '&#39;': "'"
  1607. };
  1608. /** Used to escape characters for inclusion in compiled string literals. */
  1609. var stringEscapes = {
  1610. '\\': '\\',
  1611. "'": "'",
  1612. '\n': 'n',
  1613. '\r': 'r',
  1614. '\u2028': 'u2028',
  1615. '\u2029': 'u2029'
  1616. };
  1617. /** Built-in method references without a dependency on `root`. */
  1618. var freeParseFloat = parseFloat,
  1619. freeParseInt = parseInt;
  1620. /** Detect free variable `global` from Node.js. */
  1621. var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;
  1622. /** Detect free variable `self`. */
  1623. var freeSelf = typeof self == 'object' && self && self.Object === Object && self;
  1624. /** Used as a reference to the global object. */
  1625. var root = freeGlobal || freeSelf || Function('return this')();
  1626. /** Detect free variable `exports`. */
  1627. var freeExports = typeof exports == 'object' && exports && !exports.nodeType && exports;
  1628. /** Detect free variable `module`. */
  1629. var freeModule = freeExports && typeof module == 'object' && module && !module.nodeType && module;
  1630. /** Detect the popular CommonJS extension `module.exports`. */
  1631. var moduleExports = freeModule && freeModule.exports === freeExports;
  1632. /** Detect free variable `process` from Node.js. */
  1633. var freeProcess = moduleExports && freeGlobal.process;
  1634. /** Used to access faster Node.js helpers. */
  1635. var nodeUtil = (function() {
  1636. try {
  1637. // Use `util.types` for Node.js 10+.
  1638. var types = freeModule && freeModule.require && freeModule.require('util').types;
  1639. if (types) {
  1640. return types;
  1641. }
  1642. // Legacy `process.binding('util')` for Node.js < 10.
  1643. return freeProcess && freeProcess.binding && freeProcess.binding('util');
  1644. } catch (e) {}
  1645. }());
  1646. /* Node.js helper references. */
  1647. var nodeIsArrayBuffer = nodeUtil && nodeUtil.isArrayBuffer,
  1648. nodeIsDate = nodeUtil && nodeUtil.isDate,
  1649. nodeIsMap = nodeUtil && nodeUtil.isMap,
  1650. nodeIsRegExp = nodeUtil && nodeUtil.isRegExp,
  1651. nodeIsSet = nodeUtil && nodeUtil.isSet,
  1652. nodeIsTypedArray = nodeUtil && nodeUtil.isTypedArray;
  1653. /*--------------------------------------------------------------------------*/
  1654. /**
  1655. * A faster alternative to `Function#apply`, this function invokes `func`
  1656. * with the `this` binding of `thisArg` and the arguments of `args`.
  1657. *
  1658. * @private
  1659. * @param {Function} func The function to invoke.
  1660. * @param {*} thisArg The `this` binding of `func`.
  1661. * @param {Array} args The arguments to invoke `func` with.
  1662. * @returns {*} Returns the result of `func`.
  1663. */
  1664. function apply(func, thisArg, args) {
  1665. switch (args.length) {
  1666. case 0: return func.call(thisArg);
  1667. case 1: return func.call(thisArg, args[0]);
  1668. case 2: return func.call(thisArg, args[0], args[1]);
  1669. case 3: return func.call(thisArg, args[0], args[1], args[2]);
  1670. }
  1671. return func.apply(thisArg, args);
  1672. }
  1673. /**
  1674. * A specialized version of `baseAggregator` for arrays.
  1675. *
  1676. * @private
  1677. * @param {Array} [array] The array to iterate over.
  1678. * @param {Function} setter The function to set `accumulator` values.
  1679. * @param {Function} iteratee The iteratee to transform keys.
  1680. * @param {Object} accumulator The initial aggregated object.
  1681. * @returns {Function} Returns `accumulator`.
  1682. */
  1683. function arrayAggregator(array, setter, iteratee, accumulator) {
  1684. var index = -1,
  1685. length = array == null ? 0 : array.length;
  1686. while (++index < length) {
  1687. var value = array[index];
  1688. setter(accumulator, value, iteratee(value), array);
  1689. }
  1690. return accumulator;
  1691. }
  1692. /**
  1693. * A specialized version of `_.forEach` for arrays without support for
  1694. * iteratee shorthands.
  1695. *
  1696. * @private
  1697. * @param {Array} [array] The array to iterate over.
  1698. * @param {Function} iteratee The function invoked per iteration.
  1699. * @returns {Array} Returns `array`.
  1700. */
  1701. function arrayEach(array, iteratee) {
  1702. var index = -1,
  1703. length = array == null ? 0 : array.length;
  1704. while (++index < length) {
  1705. if (iteratee(array[index], index, array) === false) {
  1706. break;
  1707. }
  1708. }
  1709. return array;
  1710. }
  1711. /**
  1712. * A specialized version of `_.forEachRight` for arrays without support for
  1713. * iteratee shorthands.
  1714. *
  1715. * @private
  1716. * @param {Array} [array] The array to iterate over.
  1717. * @param {Function} iteratee The function invoked per iteration.
  1718. * @returns {Array} Returns `array`.
  1719. */
  1720. function arrayEachRight(array, iteratee) {
  1721. var length = array == null ? 0 : array.length;
  1722. while (length--) {
  1723. if (iteratee(array[length], length, array) === false) {
  1724. break;
  1725. }
  1726. }
  1727. return array;
  1728. }
  1729. /**
  1730. * A specialized version of `_.every` for arrays without support for
  1731. * iteratee shorthands.
  1732. *
  1733. * @private
  1734. * @param {Array} [array] The array to iterate over.
  1735. * @param {Function} predicate The function invoked per iteration.
  1736. * @returns {boolean} Returns `true` if all elements pass the predicate check,
  1737. * else `false`.
  1738. */
  1739. function arrayEvery(array, predicate) {
  1740. var index = -1,
  1741. length = array == null ? 0 : array.length;
  1742. while (++index < length) {
  1743. if (!predicate(array[index], index, array)) {
  1744. return false;
  1745. }
  1746. }
  1747. return true;
  1748. }
  1749. /**
  1750. * A specialized version of `_.filter` for arrays without support for
  1751. * iteratee shorthands.
  1752. *
  1753. * @private
  1754. * @param {Array} [array] The array to iterate over.
  1755. * @param {Function} predicate The function invoked per iteration.
  1756. * @returns {Array} Returns the new filtered array.
  1757. */
  1758. function arrayFilter(array, predicate) {
  1759. var index = -1,
  1760. length = array == null ? 0 : array.length,
  1761. resIndex = 0,
  1762. result = [];
  1763. while (++index < length) {
  1764. var value = array[index];
  1765. if (predicate(value, index, array)) {
  1766. result[resIndex++] = value;
  1767. }
  1768. }
  1769. return result;
  1770. }
  1771. /**
  1772. * A specialized version of `_.includes` for arrays without support for
  1773. * specifying an index to search from.
  1774. *
  1775. * @private
  1776. * @param {Array} [array] The array to inspect.
  1777. * @param {*} target The value to search for.
  1778. * @returns {boolean} Returns `true` if `target` is found, else `false`.
  1779. */
  1780. function arrayIncludes(array, value) {
  1781. var length = array == null ? 0 : array.length;
  1782. return !!length && baseIndexOf(array, value, 0) > -1;
  1783. }
  1784. /**
  1785. * This function is like `arrayIncludes` except that it accepts a comparator.
  1786. *
  1787. * @private
  1788. * @param {Array} [array] The array to inspect.
  1789. * @param {*} target The value to search for.
  1790. * @param {Function} comparator The comparator invoked per element.
  1791. * @returns {boolean} Returns `true` if `target` is found, else `false`.
  1792. */
  1793. function arrayIncludesWith(array, value, comparator) {
  1794. var index = -1,
  1795. length = array == null ? 0 : array.length;
  1796. while (++index < length) {
  1797. if (comparator(value, array[index])) {
  1798. return true;
  1799. }
  1800. }
  1801. return false;
  1802. }
  1803. /**
  1804. * A specialized version of `_.map` for arrays without support for iteratee
  1805. * shorthands.
  1806. *
  1807. * @private
  1808. * @param {Array} [array] The array to iterate over.
  1809. * @param {Function} iteratee The function invoked per iteration.
  1810. * @returns {Array} Returns the new mapped array.
  1811. */
  1812. function arrayMap(array, iteratee) {
  1813. var index = -1,
  1814. length = array == null ? 0 : array.length,
  1815. result = Array(length);
  1816. while (++index < length) {
  1817. result[index] = iteratee(array[index], index, array);
  1818. }
  1819. return result;
  1820. }
  1821. /**
  1822. * Appends the elements of `values` to `array`.
  1823. *
  1824. * @private
  1825. * @param {Array} array The array to modify.
  1826. * @param {Array} values The values to append.
  1827. * @returns {Array} Returns `array`.
  1828. */
  1829. function arrayPush(array, values) {
  1830. var index = -1,
  1831. length = values.length,
  1832. offset = array.length;
  1833. while (++index < length) {
  1834. array[offset + index] = values[index];
  1835. }
  1836. return array;
  1837. }
  1838. /**
  1839. * A specialized version of `_.reduce` for arrays without support for
  1840. * iteratee shorthands.
  1841. *
  1842. * @private
  1843. * @param {Array} [array] The array to iterate over.
  1844. * @param {Function} iteratee The function invoked per iteration.
  1845. * @param {*} [accumulator] The initial value.
  1846. * @param {boolean} [initAccum] Specify using the first element of `array` as
  1847. * the initial value.
  1848. * @returns {*} Returns the accumulated value.
  1849. */
  1850. function arrayReduce(array, iteratee, accumulator, initAccum) {
  1851. var index = -1,
  1852. length = array == null ? 0 : array.length;
  1853. if (initAccum && length) {
  1854. accumulator = array[++index];
  1855. }
  1856. while (++index < length) {
  1857. accumulator = iteratee(accumulator, array[index], index, array);
  1858. }
  1859. return accumulator;
  1860. }
  1861. /**
  1862. * A specialized version of `_.reduceRight` for arrays without support for
  1863. * iteratee shorthands.
  1864. *
  1865. * @private
  1866. * @param {Array} [array] The array to iterate over.
  1867. * @param {Function} iteratee The function invoked per iteration.
  1868. * @param {*} [accumulator] The initial value.
  1869. * @param {boolean} [initAccum] Specify using the last element of `array` as
  1870. * the initial value.
  1871. * @returns {*} Returns the accumulated value.
  1872. */
  1873. function arrayReduceRight(array, iteratee, accumulator, initAccum) {
  1874. var length = array == null ? 0 : array.length;
  1875. if (initAccum && length) {
  1876. accumulator = array[--length];
  1877. }
  1878. while (length--) {
  1879. accumulator = iteratee(accumulator, array[length], length, array);
  1880. }
  1881. return accumulator;
  1882. }
  1883. /**
  1884. * A specialized version of `_.some` for arrays without support for iteratee
  1885. * shorthands.
  1886. *
  1887. * @private
  1888. * @param {Array} [array] The array to iterate over.
  1889. * @param {Function} predicate The function invoked per iteration.
  1890. * @returns {boolean} Returns `true` if any element passes the predicate check,
  1891. * else `false`.
  1892. */
  1893. function arraySome(array, predicate) {
  1894. var index = -1,
  1895. length = array == null ? 0 : array.length;
  1896. while (++index < length) {
  1897. if (predicate(array[index], index, array)) {
  1898. return true;
  1899. }
  1900. }
  1901. return false;
  1902. }
  1903. /**
  1904. * Gets the size of an ASCII `string`.
  1905. *
  1906. * @private
  1907. * @param {string} string The string inspect.
  1908. * @returns {number} Returns the string size.
  1909. */
  1910. var asciiSize = baseProperty('length');
  1911. /**
  1912. * Converts an ASCII `string` to an array.
  1913. *
  1914. * @private
  1915. * @param {string} string The string to convert.
  1916. * @returns {Array} Returns the converted array.
  1917. */
  1918. function asciiToArray(string) {
  1919. return string.split('');
  1920. }
  1921. /**
  1922. * Splits an ASCII `string` into an array of its words.
  1923. *
  1924. * @private
  1925. * @param {string} The string to inspect.
  1926. * @returns {Array} Returns the words of `string`.
  1927. */
  1928. function asciiWords(string) {
  1929. return string.match(reAsciiWord) || [];
  1930. }
  1931. /**
  1932. * The base implementation of methods like `_.findKey` and `_.findLastKey`,
  1933. * without support for iteratee shorthands, which iterates over `collection`
  1934. * using `eachFunc`.
  1935. *
  1936. * @private
  1937. * @param {Array|Object} collection The collection to inspect.
  1938. * @param {Function} predicate The function invoked per iteration.
  1939. * @param {Function} eachFunc The function to iterate over `collection`.
  1940. * @returns {*} Returns the found element or its key, else `undefined`.
  1941. */
  1942. function baseFindKey(collection, predicate, eachFunc) {
  1943. var result;
  1944. eachFunc(collection, function(value, key, collection) {
  1945. if (predicate(value, key, collection)) {
  1946. result = key;
  1947. return false;
  1948. }
  1949. });
  1950. return result;
  1951. }
  1952. /**
  1953. * The base implementation of `_.findIndex` and `_.findLastIndex` without
  1954. * support for iteratee shorthands.
  1955. *
  1956. * @private
  1957. * @param {Array} array The array to inspect.
  1958. * @param {Function} predicate The function invoked per iteration.
  1959. * @param {number} fromIndex The index to search from.
  1960. * @param {boolean} [fromRight] Specify iterating from right to left.
  1961. * @returns {number} Returns the index of the matched value, else `-1`.
  1962. */
  1963. function baseFindIndex(array, predicate, fromIndex, fromRight) {
  1964. var length = array.length,
  1965. index = fromIndex + (fromRight ? 1 : -1);
  1966. while ((fromRight ? index-- : ++index < length)) {
  1967. if (predicate(array[index], index, array)) {
  1968. return index;
  1969. }
  1970. }
  1971. return -1;
  1972. }
  1973. /**
  1974. * The base implementation of `_.indexOf` without `fromIndex` bounds checks.
  1975. *
  1976. * @private
  1977. * @param {Array} array The array to inspect.
  1978. * @param {*} value The value to search for.
  1979. * @param {number} fromIndex The index to search from.
  1980. * @returns {number} Returns the index of the matched value, else `-1`.
  1981. */
  1982. function baseIndexOf(array, value, fromIndex) {
  1983. return value === value
  1984. ? strictIndexOf(array, value, fromIndex)
  1985. : baseFindIndex(array, baseIsNaN, fromIndex);
  1986. }
  1987. /**
  1988. * This function is like `baseIndexOf` except that it accepts a comparator.
  1989. *
  1990. * @private
  1991. * @param {Array} array The array to inspect.
  1992. * @param {*} value The value to search for.
  1993. * @param {number} fromIndex The index to search from.
  1994. * @param {Function} comparator The comparator invoked per element.
  1995. * @returns {number} Returns the index of the matched value, else `-1`.
  1996. */
  1997. function baseIndexOfWith(array, value, fromIndex, comparator) {
  1998. var index = fromIndex - 1,
  1999. length = array.length;
  2000. while (++index < length) {
  2001. if (comparator(array[index], value)) {
  2002. return index;
  2003. }
  2004. }
  2005. return -1;
  2006. }
  2007. /**
  2008. * The base implementation of `_.isNaN` without support for number objects.
  2009. *
  2010. * @private
  2011. * @param {*} value The value to check.
  2012. * @returns {boolean} Returns `true` if `value` is `NaN`, else `false`.
  2013. */
  2014. function baseIsNaN(value) {
  2015. return value !== value;
  2016. }
  2017. /**
  2018. * The base implementation of `_.mean` and `_.meanBy` without support for
  2019. * iteratee shorthands.
  2020. *
  2021. * @private
  2022. * @param {Array} array The array to iterate over.
  2023. * @param {Function} iteratee The function invoked per iteration.
  2024. * @returns {number} Returns the mean.
  2025. */
  2026. function baseMean(array, iteratee) {
  2027. var length = array == null ? 0 : array.length;
  2028. return length ? (baseSum(array, iteratee) / length) : NAN;
  2029. }
  2030. /**
  2031. * The base implementation of `_.property` without support for deep paths.
  2032. *
  2033. * @private
  2034. * @param {string} key The key of the property to get.
  2035. * @returns {Function} Returns the new accessor function.
  2036. */
  2037. function baseProperty(key) {
  2038. return function(object) {
  2039. return object == null ? undefined : object[key];
  2040. };
  2041. }
  2042. /**
  2043. * The base implementation of `_.propertyOf` without support for deep paths.
  2044. *
  2045. * @private
  2046. * @param {Object} object The object to query.
  2047. * @returns {Function} Returns the new accessor function.
  2048. */
  2049. function basePropertyOf(object) {
  2050. return function(key) {
  2051. return object == null ? undefined : object[key];
  2052. };
  2053. }
  2054. /**
  2055. * The base implementation of `_.reduce` and `_.reduceRight`, without support
  2056. * for iteratee shorthands, which iterates over `collection` using `eachFunc`.
  2057. *
  2058. * @private
  2059. * @param {Array|Object} collection The collection to iterate over.
  2060. * @param {Function} iteratee The function invoked per iteration.
  2061. * @param {*} accumulator The initial value.
  2062. * @param {boolean} initAccum Specify using the first or last element of
  2063. * `collection` as the initial value.
  2064. * @param {Function} eachFunc The function to iterate over `collection`.
  2065. * @returns {*} Returns the accumulated value.
  2066. */
  2067. function baseReduce(collection, iteratee, accumulator, initAccum, eachFunc) {
  2068. eachFunc(collection, function(value, index, collection) {
  2069. accumulator = initAccum
  2070. ? (initAccum = false, value)
  2071. : iteratee(accumulator, value, index, collection);
  2072. });
  2073. return accumulator;
  2074. }
  2075. /**
  2076. * The base implementation of `_.sortBy` which uses `comparer` to define the
  2077. * sort order of `array` and replaces criteria objects with their corresponding
  2078. * values.
  2079. *
  2080. * @private
  2081. * @param {Array} array The array to sort.
  2082. * @param {Function} comparer The function to define sort order.
  2083. * @returns {Array} Returns `array`.
  2084. */
  2085. function baseSortBy(array, comparer) {
  2086. var length = array.length;
  2087. array.sort(comparer);
  2088. while (length--) {
  2089. array[length] = array[length].value;
  2090. }
  2091. return array;
  2092. }
  2093. /**
  2094. * The base implementation of `_.sum` and `_.sumBy` without support for
  2095. * iteratee shorthands.
  2096. *
  2097. * @private
  2098. * @param {Array} array The array to iterate over.
  2099. * @param {Function} iteratee The function invoked per iteration.
  2100. * @returns {number} Returns the sum.
  2101. */
  2102. function baseSum(array, iteratee) {
  2103. var result,
  2104. index = -1,
  2105. length = array.length;
  2106. while (++index < length) {
  2107. var current = iteratee(array[index]);
  2108. if (current !== undefined) {
  2109. result = result === undefined ? current : (result + current);
  2110. }
  2111. }
  2112. return result;
  2113. }
  2114. /**
  2115. * The base implementation of `_.times` without support for iteratee shorthands
  2116. * or max array length checks.
  2117. *
  2118. * @private
  2119. * @param {number} n The number of times to invoke `iteratee`.
  2120. * @param {Function} iteratee The function invoked per iteration.
  2121. * @returns {Array} Returns the array of results.
  2122. */
  2123. function baseTimes(n, iteratee) {
  2124. var index = -1,
  2125. result = Array(n);
  2126. while (++index < n) {
  2127. result[index] = iteratee(index);
  2128. }
  2129. return result;
  2130. }
  2131. /**
  2132. * The base implementation of `_.toPairs` and `_.toPairsIn` which creates an array
  2133. * of key-value pairs for `object` corresponding to the property names of `props`.
  2134. *
  2135. * @private
  2136. * @param {Object} object The object to query.
  2137. * @param {Array} props The property names to get values for.
  2138. * @returns {Object} Returns the key-value pairs.
  2139. */
  2140. function baseToPairs(object, props) {
  2141. return arrayMap(props, function(key) {
  2142. return [key, object[key]];
  2143. });
  2144. }
  2145. /**
  2146. * The base implementation of `_.unary` without support for storing metadata.
  2147. *
  2148. * @private
  2149. * @param {Function} func The function to cap arguments for.
  2150. * @returns {Function} Returns the new capped function.
  2151. */
  2152. function baseUnary(func) {
  2153. return function(value) {
  2154. return func(value);
  2155. };
  2156. }
  2157. /**
  2158. * The base implementation of `_.values` and `_.valuesIn` which creates an
  2159. * array of `object` property values corresponding to the property names
  2160. * of `props`.
  2161. *
  2162. * @private
  2163. * @param {Object} object The object to query.
  2164. * @param {Array} props The property names to get values for.
  2165. * @returns {Object} Returns the array of property values.
  2166. */
  2167. function baseValues(object, props) {
  2168. return arrayMap(props, function(key) {
  2169. return object[key];
  2170. });
  2171. }
  2172. /**
  2173. * Checks if a `cache` value for `key` exists.
  2174. *
  2175. * @private
  2176. * @param {Object} cache The cache to query.
  2177. * @param {string} key The key of the entry to check.
  2178. * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
  2179. */
  2180. function cacheHas(cache, key) {
  2181. return cache.has(key);
  2182. }
  2183. /**
  2184. * Used by `_.trim` and `_.trimStart` to get the index of the first string symbol
  2185. * that is not found in the character symbols.
  2186. *
  2187. * @private
  2188. * @param {Array} strSymbols The string symbols to inspect.
  2189. * @param {Array} chrSymbols The character symbols to find.
  2190. * @returns {number} Returns the index of the first unmatched string symbol.
  2191. */
  2192. function charsStartIndex(strSymbols, chrSymbols) {
  2193. var index = -1,
  2194. length = strSymbols.length;
  2195. while (++index < length && baseIndexOf(chrSymbols, strSymbols[index], 0) > -1) {}
  2196. return index;
  2197. }
  2198. /**
  2199. * Used by `_.trim` and `_.trimEnd` to get the index of the last string symbol
  2200. * that is not found in the character symbols.
  2201. *
  2202. * @private
  2203. * @param {Array} strSymbols The string symbols to inspect.
  2204. * @param {Array} chrSymbols The character symbols to find.
  2205. * @returns {number} Returns the index of the last unmatched string symbol.
  2206. */
  2207. function charsEndIndex(strSymbols, chrSymbols) {
  2208. var index = strSymbols.length;
  2209. while (index-- && baseIndexOf(chrSymbols, strSymbols[index], 0) > -1) {}
  2210. return index;
  2211. }
  2212. /**
  2213. * Gets the number of `placeholder` occurrences in `array`.
  2214. *
  2215. * @private
  2216. * @param {Array} array The array to inspect.
  2217. * @param {*} placeholder The placeholder to search for.
  2218. * @returns {number} Returns the placeholder count.
  2219. */
  2220. function countHolders(array, placeholder) {
  2221. var length = array.length,
  2222. result = 0;
  2223. while (length--) {
  2224. if (array[length] === placeholder) {
  2225. ++result;
  2226. }
  2227. }
  2228. return result;
  2229. }
  2230. /**
  2231. * Used by `_.deburr` to convert Latin-1 Supplement and Latin Extended-A
  2232. * letters to basic Latin letters.
  2233. *
  2234. * @private
  2235. * @param {string} letter The matched letter to deburr.
  2236. * @returns {string} Returns the deburred letter.
  2237. */
  2238. var deburrLetter = basePropertyOf(deburredLetters);
  2239. /**
  2240. * Used by `_.escape` to convert characters to HTML entities.
  2241. *
  2242. * @private
  2243. * @param {string} chr The matched character to escape.
  2244. * @returns {string} Returns the escaped character.
  2245. */
  2246. var escapeHtmlChar = basePropertyOf(htmlEscapes);
  2247. /**
  2248. * Used by `_.template` to escape characters for inclusion in compiled string literals.
  2249. *
  2250. * @private
  2251. * @param {string} chr The matched character to escape.
  2252. * @returns {string} Returns the escaped character.
  2253. */
  2254. function escapeStringChar(chr) {
  2255. return '\\' + stringEscapes[chr];
  2256. }
  2257. /**
  2258. * Gets the value at `key` of `object`.
  2259. *
  2260. * @private
  2261. * @param {Object} [object] The object to query.
  2262. * @param {string} key The key of the property to get.
  2263. * @returns {*} Returns the property value.
  2264. */
  2265. function getValue(object, key) {
  2266. return object == null ? undefined : object[key];
  2267. }
  2268. /**
  2269. * Checks if `string` contains Unicode symbols.
  2270. *
  2271. * @private
  2272. * @param {string} string The string to inspect.
  2273. * @returns {boolean} Returns `true` if a symbol is found, else `false`.
  2274. */
  2275. function hasUnicode(string) {
  2276. return reHasUnicode.test(string);
  2277. }
  2278. /**
  2279. * Checks if `string` contains a word composed of Unicode symbols.
  2280. *
  2281. * @private
  2282. * @param {string} string The string to inspect.
  2283. * @returns {boolean} Returns `true` if a word is found, else `false`.
  2284. */
  2285. function hasUnicodeWord(string) {
  2286. return reHasUnicodeWord.test(string);
  2287. }
  2288. /**
  2289. * Converts `iterator` to an array.
  2290. *
  2291. * @private
  2292. * @param {Object} iterator The iterator to convert.
  2293. * @returns {Array} Returns the converted array.
  2294. */
  2295. function iteratorToArray(iterator) {
  2296. var data,
  2297. result = [];
  2298. while (!(data = iterator.next()).done) {
  2299. result.push(data.value);
  2300. }
  2301. return result;
  2302. }
  2303. /**
  2304. * Converts `map` to its key-value pairs.
  2305. *
  2306. * @private
  2307. * @param {Object} map The map to convert.
  2308. * @returns {Array} Returns the key-value pairs.
  2309. */
  2310. function mapToArray(map) {
  2311. var index = -1,
  2312. result = Array(map.size);
  2313. map.forEach(function(value, key) {
  2314. result[++index] = [key, value];
  2315. });
  2316. return result;
  2317. }
  2318. /**
  2319. * Creates a unary function that invokes `func` with its argument transformed.
  2320. *
  2321. * @private
  2322. * @param {Function} func The function to wrap.
  2323. * @param {Function} transform The argument transform.
  2324. * @returns {Function} Returns the new function.
  2325. */
  2326. function overArg(func, transform) {
  2327. return function(arg) {
  2328. return func(transform(arg));
  2329. };
  2330. }
  2331. /**
  2332. * Replaces all `placeholder` elements in `array` with an internal placeholder
  2333. * and returns an array of their indexes.
  2334. *
  2335. * @private
  2336. * @param {Array} array The array to modify.
  2337. * @param {*} placeholder The placeholder to replace.
  2338. * @returns {Array} Returns the new array of placeholder indexes.
  2339. */
  2340. function replaceHolders(array, placeholder) {
  2341. var index = -1,
  2342. length = array.length,
  2343. resIndex = 0,
  2344. result = [];
  2345. while (++index < length) {
  2346. var value = array[index];
  2347. if (value === placeholder || value === PLACEHOLDER) {
  2348. array[index] = PLACEHOLDER;
  2349. result[resIndex++] = index;
  2350. }
  2351. }
  2352. return result;
  2353. }
  2354. /**
  2355. * Gets the value at `key`, unless `key` is "__proto__".
  2356. *
  2357. * @private
  2358. * @param {Object} object The object to query.
  2359. * @param {string} key The key of the property to get.
  2360. * @returns {*} Returns the property value.
  2361. */
  2362. function safeGet(object, key) {
  2363. return key == '__proto__'
  2364. ? undefined
  2365. : object[key];
  2366. }
  2367. /**
  2368. * Converts `set` to an array of its values.
  2369. *
  2370. * @private
  2371. * @param {Object} set The set to convert.
  2372. * @returns {Array} Returns the values.
  2373. */
  2374. function setToArray(set) {
  2375. var index = -1,
  2376. result = Array(set.size);
  2377. set.forEach(function(value) {
  2378. result[++index] = value;
  2379. });
  2380. return result;
  2381. }
  2382. /**
  2383. * Converts `set` to its value-value pairs.
  2384. *
  2385. * @private
  2386. * @param {Object} set The set to convert.
  2387. * @returns {Array} Returns the value-value pairs.
  2388. */
  2389. function setToPairs(set) {
  2390. var index = -1,
  2391. result = Array(set.size);
  2392. set.forEach(function(value) {
  2393. result[++index] = [value, value];
  2394. });
  2395. return result;
  2396. }
  2397. /**
  2398. * A specialized version of `_.indexOf` which performs strict equality
  2399. * comparisons of values, i.e. `===`.
  2400. *
  2401. * @private
  2402. * @param {Array} array The array to inspect.
  2403. * @param {*} value The value to search for.
  2404. * @param {number} fromIndex The index to search from.
  2405. * @returns {number} Returns the index of the matched value, else `-1`.
  2406. */
  2407. function strictIndexOf(array, value, fromIndex) {
  2408. var index = fromIndex - 1,
  2409. length = array.length;
  2410. while (++index < length) {
  2411. if (array[index] === value) {
  2412. return index;
  2413. }
  2414. }
  2415. return -1;
  2416. }
  2417. /**
  2418. * A specialized version of `_.lastIndexOf` which performs strict equality
  2419. * comparisons of values, i.e. `===`.
  2420. *
  2421. * @private
  2422. * @param {Array} array The array to inspect.
  2423. * @param {*} value The value to search for.
  2424. * @param {number} fromIndex The index to search from.
  2425. * @returns {number} Returns the index of the matched value, else `-1`.
  2426. */
  2427. function strictLastIndexOf(array, value, fromIndex) {
  2428. var index = fromIndex + 1;
  2429. while (index--) {
  2430. if (array[index] === value) {
  2431. return index;
  2432. }
  2433. }
  2434. return index;
  2435. }
  2436. /**
  2437. * Gets the number of symbols in `string`.
  2438. *
  2439. * @private
  2440. * @param {string} string The string to inspect.
  2441. * @returns {number} Returns the string size.
  2442. */
  2443. function stringSize(string) {
  2444. return hasUnicode(string)
  2445. ? unicodeSize(string)
  2446. : asciiSize(string);
  2447. }
  2448. /**
  2449. * Converts `string` to an array.
  2450. *
  2451. * @private
  2452. * @param {string} string The string to convert.
  2453. * @returns {Array} Returns the converted array.
  2454. */
  2455. function stringToArray(string) {
  2456. return hasUnicode(string)
  2457. ? unicodeToArray(string)
  2458. : asciiToArray(string);
  2459. }
  2460. /**
  2461. * Used by `_.unescape` to convert HTML entities to characters.
  2462. *
  2463. * @private
  2464. * @param {string} chr The matched character to unescape.
  2465. * @returns {string} Returns the unescaped character.
  2466. */
  2467. var unescapeHtmlChar = basePropertyOf(htmlUnescapes);
  2468. /**
  2469. * Gets the size of a Unicode `string`.
  2470. *
  2471. * @private
  2472. * @param {string} string The string inspect.
  2473. * @returns {number} Returns the string size.
  2474. */
  2475. function unicodeSize(string) {
  2476. var result = reUnicode.lastIndex = 0;
  2477. while (reUnicode.test(string)) {
  2478. ++result;
  2479. }
  2480. return result;
  2481. }
  2482. /**
  2483. * Converts a Unicode `string` to an array.
  2484. *
  2485. * @private
  2486. * @param {string} string The string to convert.
  2487. * @returns {Array} Returns the converted array.
  2488. */
  2489. function unicodeToArray(string) {
  2490. return string.match(reUnicode) || [];
  2491. }
  2492. /**
  2493. * Splits a Unicode `string` into an array of its words.
  2494. *
  2495. * @private
  2496. * @param {string} The string to inspect.
  2497. * @returns {Array} Returns the words of `string`.
  2498. */
  2499. function unicodeWords(string) {
  2500. return string.match(reUnicodeWord) || [];
  2501. }
  2502. /*--------------------------------------------------------------------------*/
  2503. /**
  2504. * Create a new pristine `lodash` function using the `context` object.
  2505. *
  2506. * @static
  2507. * @memberOf _
  2508. * @since 1.1.0
  2509. * @category Util
  2510. * @param {Object} [context=root] The context object.
  2511. * @returns {Function} Returns a new `lodash` function.
  2512. * @example
  2513. *
  2514. * _.mixin({ 'foo': _.constant('foo') });
  2515. *
  2516. * var lodash = _.runInContext();
  2517. * lodash.mixin({ 'bar': lodash.constant('bar') });
  2518. *
  2519. * _.isFunction(_.foo);
  2520. * // => true
  2521. * _.isFunction(_.bar);
  2522. * // => false
  2523. *
  2524. * lodash.isFunction(lodash.foo);
  2525. * // => false
  2526. * lodash.isFunction(lodash.bar);
  2527. * // => true
  2528. *
  2529. * // Create a suped-up `defer` in Node.js.
  2530. * var defer = _.runInContext({ 'setTimeout': setImmediate }).defer;
  2531. */
  2532. var runInContext = (function runInContext(context) {
  2533. context = context == null ? root : _.defaults(root.Object(), context, _.pick(root, contextProps));
  2534. /** Built-in constructor references. */
  2535. var Array = context.Array,
  2536. Date = context.Date,
  2537. Error = context.Error,
  2538. Function = context.Function,
  2539. Math = context.Math,
  2540. Object = context.Object,
  2541. RegExp = context.RegExp,
  2542. String = context.String,
  2543. TypeError = context.TypeError;
  2544. /** Used for built-in method references. */
  2545. var arrayProto = Array.prototype,
  2546. funcProto = Function.prototype,
  2547. objectProto = Object.prototype;
  2548. /** Used to detect overreaching core-js shims. */
  2549. var coreJsData = context['__core-js_shared__'];
  2550. /** Used to resolve the decompiled source of functions. */
  2551. var funcToString = funcProto.toString;
  2552. /** Used to check objects for own properties. */
  2553. var hasOwnProperty = objectProto.hasOwnProperty;
  2554. /** Used to generate unique IDs. */
  2555. var idCounter = 0;
  2556. /** Used to detect methods masquerading as native. */
  2557. var maskSrcKey = (function() {
  2558. var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');
  2559. return uid ? ('Symbol(src)_1.' + uid) : '';
  2560. }());
  2561. /**
  2562. * Used to resolve the
  2563. * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
  2564. * of values.
  2565. */
  2566. var nativeObjectToString = objectProto.toString;
  2567. /** Used to infer the `Object` constructor. */
  2568. var objectCtorString = funcToString.call(Object);
  2569. /** Used to restore the original `_` reference in `_.noConflict`. */
  2570. var oldDash = root._;
  2571. /** Used to detect if a method is native. */
  2572. var reIsNative = RegExp('^' +
  2573. funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&')
  2574. .replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
  2575. );
  2576. /** Built-in value references. */
  2577. var Buffer = moduleExports ? context.Buffer : undefined,
  2578. Symbol = context.Symbol,
  2579. Uint8Array = context.Uint8Array,
  2580. allocUnsafe = Buffer ? Buffer.allocUnsafe : undefined,
  2581. getPrototype = overArg(Object.getPrototypeOf, Object),
  2582. objectCreate = Object.create,
  2583. propertyIsEnumerable = objectProto.propertyIsEnumerable,
  2584. splice = arrayProto.splice,
  2585. spreadableSymbol = Symbol ? Symbol.isConcatSpreadable : undefined,
  2586. symIterator = Symbol ? Symbol.iterator : undefined,
  2587. symToStringTag = Symbol ? Symbol.toStringTag : undefined;
  2588. var defineProperty = (function() {
  2589. try {
  2590. var func = getNative(Object, 'defineProperty');
  2591. func({}, '', {});
  2592. return func;
  2593. } catch (e) {}
  2594. }());
  2595. /** Mocked built-ins. */
  2596. var ctxClearTimeout = context.clearTimeout !== root.clearTimeout && context.clearTimeout,
  2597. ctxNow = Date && Date.now !== root.Date.now && Date.now,
  2598. ctxSetTimeout = context.setTimeout !== root.setTimeout && context.setTimeout;
  2599. /* Built-in method references for those with the same name as other `lodash` methods. */
  2600. var nativeCeil = Math.ceil,
  2601. nativeFloor = Math.floor,
  2602. nativeGetSymbols = Object.getOwnPropertySymbols,
  2603. nativeIsBuffer = Buffer ? Buffer.isBuffer : undefined,
  2604. nativeIsFinite = context.isFinite,
  2605. nativeJoin = arrayProto.join,
  2606. nativeKeys = overArg(Object.keys, Object),
  2607. nativeMax = Math.max,
  2608. nativeMin = Math.min,
  2609. nativeNow = Date.now,
  2610. nativeParseInt = context.parseInt,
  2611. nativeRandom = Math.random,
  2612. nativeReverse = arrayProto.reverse;
  2613. /* Built-in method references that are verified to be native. */
  2614. var DataView = getNative(context, 'DataView'),
  2615. Map = getNative(context, 'Map'),
  2616. Promise = getNative(context, 'Promise'),
  2617. Set = getNative(context, 'Set'),
  2618. WeakMap = getNative(context, 'WeakMap'),
  2619. nativeCreate = getNative(Object, 'create');
  2620. /** Used to store function metadata. */
  2621. var metaMap = WeakMap && new WeakMap;
  2622. /** Used to lookup unminified function names. */
  2623. var realNames = {};
  2624. /** Used to detect maps, sets, and weakmaps. */
  2625. var dataViewCtorString = toSource(DataView),
  2626. mapCtorString = toSource(Map),
  2627. promiseCtorString = toSource(Promise),
  2628. setCtorString = toSource(Set),
  2629. weakMapCtorString = toSource(WeakMap);
  2630. /** Used to convert symbols to primitives and strings. */
  2631. var symbolProto = Symbol ? Symbol.prototype : undefined,
  2632. symbolValueOf = symbolProto ? symbolProto.valueOf : undefined,
  2633. symbolToString = symbolProto ? symbolProto.toString : undefined;
  2634. /*------------------------------------------------------------------------*/
  2635. /**
  2636. * Creates a `lodash` object which wraps `value` to enable implicit method
  2637. * chain sequences. Methods that operate on and return arrays, collections,
  2638. * and functions can be chained together. Methods that retrieve a single value
  2639. * or may return a primitive value will automatically end the chain sequence
  2640. * and return the unwrapped value. Otherwise, the value must be unwrapped
  2641. * with `_#value`.
  2642. *
  2643. * Explicit chain sequences, which must be unwrapped with `_#value`, may be
  2644. * enabled using `_.chain`.
  2645. *
  2646. * The execution of chained methods is lazy, that is, it's deferred until
  2647. * `_#value` is implicitly or explicitly called.
  2648. *
  2649. * Lazy evaluation allows several methods to support shortcut fusion.
  2650. * Shortcut fusion is an optimization to merge iteratee calls; this avoids
  2651. * the creation of intermediate arrays and can greatly reduce the number of
  2652. * iteratee executions. Sections of a chain sequence qualify for shortcut
  2653. * fusion if the section is applied to an array and iteratees accept only
  2654. * one argument. The heuristic for whether a section qualifies for shortcut
  2655. * fusion is subject to change.
  2656. *
  2657. * Chaining is supported in custom builds as long as the `_#value` method is
  2658. * directly or indirectly included in the build.
  2659. *
  2660. * In addition to lodash methods, wrappers have `Array` and `String` methods.
  2661. *
  2662. * The wrapper `Array` methods are:
  2663. * `concat`, `join`, `pop`, `push`, `shift`, `sort`, `splice`, and `unshift`
  2664. *
  2665. * The wrapper `String` methods are:
  2666. * `replace` and `split`
  2667. *
  2668. * The wrapper methods that support shortcut fusion are:
  2669. * `at`, `compact`, `drop`, `dropRight`, `dropWhile`, `filter`, `find`,
  2670. * `findLast`, `head`, `initial`, `last`, `map`, `reject`, `reverse`, `slice`,
  2671. * `tail`, `take`, `takeRight`, `takeRightWhile`, `takeWhile`, and `toArray`
  2672. *
  2673. * The chainable wrapper methods are:
  2674. * `after`, `ary`, `assign`, `assignIn`, `assignInWith`, `assignWith`, `at`,
  2675. * `before`, `bind`, `bindAll`, `bindKey`, `castArray`, `chain`, `chunk`,
  2676. * `commit`, `compact`, `concat`, `conforms`, `constant`, `countBy`, `create`,
  2677. * `curry`, `debounce`, `defaults`, `defaultsDeep`, `defer`, `delay`,
  2678. * `difference`, `differenceBy`, `differenceWith`, `drop`, `dropRight`,
  2679. * `dropRightWhile`, `dropWhile`, `extend`, `extendWith`, `fill`, `filter`,
  2680. * `flatMap`, `flatMapDeep`, `flatMapDepth`, `flatten`, `flattenDeep`,
  2681. * `flattenDepth`, `flip`, `flow`, `flowRight`, `fromPairs`, `functions`,
  2682. * `functionsIn`, `groupBy`, `initial`, `intersection`, `intersectionBy`,
  2683. * `intersectionWith`, `invert`, `invertBy`, `invokeMap`, `iteratee`, `keyBy`,
  2684. * `keys`, `keysIn`, `map`, `mapKeys`, `mapValues`, `matches`, `matchesProperty`,
  2685. * `memoize`, `merge`, `mergeWith`, `method`, `methodOf`, `mixin`, `negate`,
  2686. * `nthArg`, `omit`, `omitBy`, `once`, `orderBy`, `over`, `overArgs`,
  2687. * `overEvery`, `overSome`, `partial`, `partialRight`, `partition`, `pick`,
  2688. * `pickBy`, `plant`, `property`, `propertyOf`, `pull`, `pullAll`, `pullAllBy`,
  2689. * `pullAllWith`, `pullAt`, `push`, `range`, `rangeRight`, `rearg`, `reject`,
  2690. * `remove`, `rest`, `reverse`, `sampleSize`, `set`, `setWith`, `shuffle`,
  2691. * `slice`, `sort`, `sortBy`, `splice`, `spread`, `tail`, `take`, `takeRight`,
  2692. * `takeRightWhile`, `takeWhile`, `tap`, `throttle`, `thru`, `toArray`,
  2693. * `toPairs`, `toPairsIn`, `toPath`, `toPlainObject`, `transform`, `unary`,
  2694. * `union`, `unionBy`, `unionWith`, `uniq`, `uniqBy`, `uniqWith`, `unset`,
  2695. * `unshift`, `unzip`, `unzipWith`, `update`, `updateWith`, `values`,
  2696. * `valuesIn`, `without`, `wrap`, `xor`, `xorBy`, `xorWith`, `zip`,
  2697. * `zipObject`, `zipObjectDeep`, and `zipWith`
  2698. *
  2699. * The wrapper methods that are **not** chainable by default are:
  2700. * `add`, `attempt`, `camelCase`, `capitalize`, `ceil`, `clamp`, `clone`,
  2701. * `cloneDeep`, `cloneDeepWith`, `cloneWith`, `conformsTo`, `deburr`,
  2702. * `defaultTo`, `divide`, `each`, `eachRight`, `endsWith`, `eq`, `escape`,
  2703. * `escapeRegExp`, `every`, `find`, `findIndex`, `findKey`, `findLast`,
  2704. * `findLastIndex`, `findLastKey`, `first`, `floor`, `forEach`, `forEachRight`,
  2705. * `forIn`, `forInRight`, `forOwn`, `forOwnRight`, `get`, `gt`, `gte`, `has`,
  2706. * `hasIn`, `head`, `identity`, `includes`, `indexOf`, `inRange`, `invoke`,
  2707. * `isArguments`, `isArray`, `isArrayBuffer`, `isArrayLike`, `isArrayLikeObject`,
  2708. * `isBoolean`, `isBuffer`, `isDate`, `isElement`, `isEmpty`, `isEqual`,
  2709. * `isEqualWith`, `isError`, `isFinite`, `isFunction`, `isInteger`, `isLength`,
  2710. * `isMap`, `isMatch`, `isMatchWith`, `isNaN`, `isNative`, `isNil`, `isNull`,
  2711. * `isNumber`, `isObject`, `isObjectLike`, `isPlainObject`, `isRegExp`,
  2712. * `isSafeInteger`, `isSet`, `isString`, `isUndefined`, `isTypedArray`,
  2713. * `isWeakMap`, `isWeakSet`, `join`, `kebabCase`, `last`, `lastIndexOf`,
  2714. * `lowerCase`, `lowerFirst`, `lt`, `lte`, `max`, `maxBy`, `mean`, `meanBy`,
  2715. * `min`, `minBy`, `multiply`, `noConflict`, `noop`, `now`, `nth`, `pad`,
  2716. * `padEnd`, `padStart`, `parseInt`, `pop`, `random`, `reduce`, `reduceRight`,
  2717. * `repeat`, `result`, `round`, `runInContext`, `sample`, `shift`, `size`,
  2718. * `snakeCase`, `some`, `sortedIndex`, `sortedIndexBy`, `sortedLastIndex`,
  2719. * `sortedLastIndexBy`, `startCase`, `startsWith`, `stubArray`, `stubFalse`,
  2720. * `stubObject`, `stubString`, `stubTrue`, `subtract`, `sum`, `sumBy`,
  2721. * `template`, `times`, `toFinite`, `toInteger`, `toJSON`, `toLength`,
  2722. * `toLower`, `toNumber`, `toSafeInteger`, `toString`, `toUpper`, `trim`,
  2723. * `trimEnd`, `trimStart`, `truncate`, `unescape`, `uniqueId`, `upperCase`,
  2724. * `upperFirst`, `value`, and `words`
  2725. *
  2726. * @name _
  2727. * @constructor
  2728. * @category Seq
  2729. * @param {*} value The value to wrap in a `lodash` instance.
  2730. * @returns {Object} Returns the new `lodash` wrapper instance.
  2731. * @example
  2732. *
  2733. * function square(n) {
  2734. * return n * n;
  2735. * }
  2736. *
  2737. * var wrapped = _([1, 2, 3]);
  2738. *
  2739. * // Returns an unwrapped value.
  2740. * wrapped.reduce(_.add);
  2741. * // => 6
  2742. *
  2743. * // Returns a wrapped value.
  2744. * var squares = wrapped.map(square);
  2745. *
  2746. * _.isArray(squares);
  2747. * // => false
  2748. *
  2749. * _.isArray(squares.value());
  2750. * // => true
  2751. */
  2752. function lodash(value) {
  2753. if (isObjectLike(value) && !isArray(value) && !(value instanceof LazyWrapper)) {
  2754. if (value instanceof LodashWrapper) {
  2755. return value;
  2756. }
  2757. if (hasOwnProperty.call(value, '__wrapped__')) {
  2758. return wrapperClone(value);
  2759. }
  2760. }
  2761. return new LodashWrapper(value);
  2762. }
  2763. /**
  2764. * The base implementation of `_.create` without support for assigning
  2765. * properties to the created object.
  2766. *
  2767. * @private
  2768. * @param {Object} proto The object to inherit from.
  2769. * @returns {Object} Returns the new object.
  2770. */
  2771. var baseCreate = (function() {
  2772. function object() {}
  2773. return function(proto) {
  2774. if (!isObject(proto)) {
  2775. return {};
  2776. }
  2777. if (objectCreate) {
  2778. return objectCreate(proto);
  2779. }
  2780. object.prototype = proto;
  2781. var result = new object;
  2782. object.prototype = undefined;
  2783. return result;
  2784. };
  2785. }());
  2786. /**
  2787. * The function whose prototype chain sequence wrappers inherit from.
  2788. *
  2789. * @private
  2790. */
  2791. function baseLodash() {
  2792. // No operation performed.
  2793. }
  2794. /**
  2795. * The base constructor for creating `lodash` wrapper objects.
  2796. *
  2797. * @private
  2798. * @param {*} value The value to wrap.
  2799. * @param {boolean} [chainAll] Enable explicit method chain sequences.
  2800. */
  2801. function LodashWrapper(value, chainAll) {
  2802. this.__wrapped__ = value;
  2803. this.__actions__ = [];
  2804. this.__chain__ = !!chainAll;
  2805. this.__index__ = 0;
  2806. this.__values__ = undefined;
  2807. }
  2808. /**
  2809. * By default, the template delimiters used by lodash are like those in
  2810. * embedded Ruby (ERB) as well as ES2015 template strings. Change the
  2811. * following template settings to use alternative delimiters.
  2812. *
  2813. * @static
  2814. * @memberOf _
  2815. * @type {Object}
  2816. */
  2817. lodash.templateSettings = {
  2818. /**
  2819. * Used to detect `data` property values to be HTML-escaped.
  2820. *
  2821. * @memberOf _.templateSettings
  2822. * @type {RegExp}
  2823. */
  2824. 'escape': reEscape,
  2825. /**
  2826. * Used to detect code to be evaluated.
  2827. *
  2828. * @memberOf _.templateSettings
  2829. * @type {RegExp}
  2830. */
  2831. 'evaluate': reEvaluate,
  2832. /**
  2833. * Used to detect `data` property values to inject.
  2834. *
  2835. * @memberOf _.templateSettings
  2836. * @type {RegExp}
  2837. */
  2838. 'interpolate': reInterpolate,
  2839. /**
  2840. * Used to reference the data object in the template text.
  2841. *
  2842. * @memberOf _.templateSettings
  2843. * @type {string}
  2844. */
  2845. 'variable': '',
  2846. /**
  2847. * Used to import variables into the compiled template.
  2848. *
  2849. * @memberOf _.templateSettings
  2850. * @type {Object}
  2851. */
  2852. 'imports': {
  2853. /**
  2854. * A reference to the `lodash` function.
  2855. *
  2856. * @memberOf _.templateSettings.imports
  2857. * @type {Function}
  2858. */
  2859. '_': lodash
  2860. }
  2861. };
  2862. // Ensure wrappers are instances of `baseLodash`.
  2863. lodash.prototype = baseLodash.prototype;
  2864. lodash.prototype.constructor = lodash;
  2865. LodashWrapper.prototype = baseCreate(baseLodash.prototype);
  2866. LodashWrapper.prototype.constructor = LodashWrapper;
  2867. /*------------------------------------------------------------------------*/
  2868. /**
  2869. * Creates a lazy wrapper object which wraps `value` to enable lazy evaluation.
  2870. *
  2871. * @private
  2872. * @constructor
  2873. * @param {*} value The value to wrap.
  2874. */
  2875. function LazyWrapper(value) {
  2876. this.__wrapped__ = value;
  2877. this.__actions__ = [];
  2878. this.__dir__ = 1;
  2879. this.__filtered__ = false;
  2880. this.__iteratees__ = [];
  2881. this.__takeCount__ = MAX_ARRAY_LENGTH;
  2882. this.__views__ = [];
  2883. }
  2884. /**
  2885. * Creates a clone of the lazy wrapper object.
  2886. *
  2887. * @private
  2888. * @name clone
  2889. * @memberOf LazyWrapper
  2890. * @returns {Object} Returns the cloned `LazyWrapper` object.
  2891. */
  2892. function lazyClone() {
  2893. var result = new LazyWrapper(this.__wrapped__);
  2894. result.__actions__ = copyArray(this.__actions__);
  2895. result.__dir__ = this.__dir__;
  2896. result.__filtered__ = this.__filtered__;
  2897. result.__iteratees__ = copyArray(this.__iteratees__);
  2898. result.__takeCount__ = this.__takeCount__;
  2899. result.__views__ = copyArray(this.__views__);
  2900. return result;
  2901. }
  2902. /**
  2903. * Reverses the direction of lazy iteration.
  2904. *
  2905. * @private
  2906. * @name reverse
  2907. * @memberOf LazyWrapper
  2908. * @returns {Object} Returns the new reversed `LazyWrapper` object.
  2909. */
  2910. function lazyReverse() {
  2911. if (this.__filtered__) {
  2912. var result = new LazyWrapper(this);
  2913. result.__dir__ = -1;
  2914. result.__filtered__ = true;
  2915. } else {
  2916. result = this.clone();
  2917. result.__dir__ *= -1;
  2918. }
  2919. return result;
  2920. }
  2921. /**
  2922. * Extracts the unwrapped value from its lazy wrapper.
  2923. *
  2924. * @private
  2925. * @name value
  2926. * @memberOf LazyWrapper
  2927. * @returns {*} Returns the unwrapped value.
  2928. */
  2929. function lazyValue() {
  2930. var array = this.__wrapped__.value(),
  2931. dir = this.__dir__,
  2932. isArr = isArray(array),
  2933. isRight = dir < 0,
  2934. arrLength = isArr ? array.length : 0,
  2935. view = getView(0, arrLength, this.__views__),
  2936. start = view.start,
  2937. end = view.end,
  2938. length = end - start,
  2939. index = isRight ? end : (start - 1),
  2940. iteratees = this.__iteratees__,
  2941. iterLength = iteratees.length,
  2942. resIndex = 0,
  2943. takeCount = nativeMin(length, this.__takeCount__);
  2944. if (!isArr || (!isRight && arrLength == length && takeCount == length)) {
  2945. return baseWrapperValue(array, this.__actions__);
  2946. }
  2947. var result = [];
  2948. outer:
  2949. while (length-- && resIndex < takeCount) {
  2950. index += dir;
  2951. var iterIndex = -1,
  2952. value = array[index];
  2953. while (++iterIndex < iterLength) {
  2954. var data = iteratees[iterIndex],
  2955. iteratee = data.iteratee,
  2956. type = data.type,
  2957. computed = iteratee(value);
  2958. if (type == LAZY_MAP_FLAG) {
  2959. value = computed;
  2960. } else if (!computed) {
  2961. if (type == LAZY_FILTER_FLAG) {
  2962. continue outer;
  2963. } else {
  2964. break outer;
  2965. }
  2966. }
  2967. }
  2968. result[resIndex++] = value;
  2969. }
  2970. return result;
  2971. }
  2972. // Ensure `LazyWrapper` is an instance of `baseLodash`.
  2973. LazyWrapper.prototype = baseCreate(baseLodash.prototype);
  2974. LazyWrapper.prototype.constructor = LazyWrapper;
  2975. /*------------------------------------------------------------------------*/
  2976. /**
  2977. * Creates a hash object.
  2978. *
  2979. * @private
  2980. * @constructor
  2981. * @param {Array} [entries] The key-value pairs to cache.
  2982. */
  2983. function Hash(entries) {
  2984. var index = -1,
  2985. length = entries == null ? 0 : entries.length;
  2986. this.clear();
  2987. while (++index < length) {
  2988. var entry = entries[index];
  2989. this.set(entry[0], entry[1]);
  2990. }
  2991. }
  2992. /**
  2993. * Removes all key-value entries from the hash.
  2994. *
  2995. * @private
  2996. * @name clear
  2997. * @memberOf Hash
  2998. */
  2999. function hashClear() {
  3000. this.__data__ = nativeCreate ? nativeCreate(null) : {};
  3001. this.size = 0;
  3002. }
  3003. /**
  3004. * Removes `key` and its value from the hash.
  3005. *
  3006. * @private
  3007. * @name delete
  3008. * @memberOf Hash
  3009. * @param {Object} hash The hash to modify.
  3010. * @param {string} key The key of the value to remove.
  3011. * @returns {boolean} Returns `true` if the entry was removed, else `false`.
  3012. */
  3013. function hashDelete(key) {
  3014. var result = this.has(key) && delete this.__data__[key];
  3015. this.size -= result ? 1 : 0;
  3016. return result;
  3017. }
  3018. /**
  3019. * Gets the hash value for `key`.
  3020. *
  3021. * @private
  3022. * @name get
  3023. * @memberOf Hash
  3024. * @param {string} key The key of the value to get.
  3025. * @returns {*} Returns the entry value.
  3026. */
  3027. function hashGet(key) {
  3028. var data = this.__data__;
  3029. if (nativeCreate) {
  3030. var result = data[key];
  3031. return result === HASH_UNDEFINED ? undefined : result;
  3032. }
  3033. return hasOwnProperty.call(data, key) ? data[key] : undefined;
  3034. }
  3035. /**
  3036. * Checks if a hash value for `key` exists.
  3037. *
  3038. * @private
  3039. * @name has
  3040. * @memberOf Hash
  3041. * @param {string} key The key of the entry to check.
  3042. * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
  3043. */
  3044. function hashHas(key) {
  3045. var data = this.__data__;
  3046. return nativeCreate ? (data[key] !== undefined) : hasOwnProperty.call(data, key);
  3047. }
  3048. /**
  3049. * Sets the hash `key` to `value`.
  3050. *
  3051. * @private
  3052. * @name set
  3053. * @memberOf Hash
  3054. * @param {string} key The key of the value to set.
  3055. * @param {*} value The value to set.
  3056. * @returns {Object} Returns the hash instance.
  3057. */
  3058. function hashSet(key, value) {
  3059. var data = this.__data__;
  3060. this.size += this.has(key) ? 0 : 1;
  3061. data[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value;
  3062. return this;
  3063. }
  3064. // Add methods to `Hash`.
  3065. Hash.prototype.clear = hashClear;
  3066. Hash.prototype['delete'] = hashDelete;
  3067. Hash.prototype.get = hashGet;
  3068. Hash.prototype.has = hashHas;
  3069. Hash.prototype.set = hashSet;
  3070. /*------------------------------------------------------------------------*/
  3071. /**
  3072. * Creates an list cache object.
  3073. *
  3074. * @private
  3075. * @constructor
  3076. * @param {Array} [entries] The key-value pairs to cache.
  3077. */
  3078. function ListCache(entries) {
  3079. var index = -1,
  3080. length = entries == null ? 0 : entries.length;
  3081. this.clear();
  3082. while (++index < length) {
  3083. var entry = entries[index];
  3084. this.set(entry[0], entry[1]);
  3085. }
  3086. }
  3087. /**
  3088. * Removes all key-value entries from the list cache.
  3089. *
  3090. * @private
  3091. * @name clear
  3092. * @memberOf ListCache
  3093. */
  3094. function listCacheClear() {
  3095. this.__data__ = [];
  3096. this.size = 0;
  3097. }
  3098. /**
  3099. * Removes `key` and its value from the list cache.
  3100. *
  3101. * @private
  3102. * @name delete
  3103. * @memberOf ListCache
  3104. * @param {string} key The key of the value to remove.
  3105. * @returns {boolean} Returns `true` if the entry was removed, else `false`.
  3106. */
  3107. function listCacheDelete(key) {
  3108. var data = this.__data__,
  3109. index = assocIndexOf(data, key);
  3110. if (index < 0) {
  3111. return false;
  3112. }
  3113. var lastIndex = data.length - 1;
  3114. if (index == lastIndex) {
  3115. data.pop();
  3116. } else {
  3117. splice.call(data, index, 1);
  3118. }
  3119. --this.size;
  3120. return true;
  3121. }
  3122. /**
  3123. * Gets the list cache value for `key`.
  3124. *
  3125. * @private
  3126. * @name get
  3127. * @memberOf ListCache
  3128. * @param {string} key The key of the value to get.
  3129. * @returns {*} Returns the entry value.
  3130. */
  3131. function listCacheGet(key) {
  3132. var data = this.__data__,
  3133. index = assocIndexOf(data, key);
  3134. return index < 0 ? undefined : data[index][1];
  3135. }
  3136. /**
  3137. * Checks if a list cache value for `key` exists.
  3138. *
  3139. * @private
  3140. * @name has
  3141. * @memberOf ListCache
  3142. * @param {string} key The key of the entry to check.
  3143. * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
  3144. */
  3145. function listCacheHas(key) {
  3146. return assocIndexOf(this.__data__, key) > -1;
  3147. }
  3148. /**
  3149. * Sets the list cache `key` to `value`.
  3150. *
  3151. * @private
  3152. * @name set
  3153. * @memberOf ListCache
  3154. * @param {string} key The key of the value to set.
  3155. * @param {*} value The value to set.
  3156. * @returns {Object} Returns the list cache instance.
  3157. */
  3158. function listCacheSet(key, value) {
  3159. var data = this.__data__,
  3160. index = assocIndexOf(data, key);
  3161. if (index < 0) {
  3162. ++this.size;
  3163. data.push([key, value]);
  3164. } else {
  3165. data[index][1] = value;
  3166. }
  3167. return this;
  3168. }
  3169. // Add methods to `ListCache`.
  3170. ListCache.prototype.clear = listCacheClear;
  3171. ListCache.prototype['delete'] = listCacheDelete;
  3172. ListCache.prototype.get = listCacheGet;
  3173. ListCache.prototype.has = listCacheHas;
  3174. ListCache.prototype.set = listCacheSet;
  3175. /*------------------------------------------------------------------------*/
  3176. /**
  3177. * Creates a map cache object to store key-value pairs.
  3178. *
  3179. * @private
  3180. * @constructor
  3181. * @param {Array} [entries] The key-value pairs to cache.
  3182. */
  3183. function MapCache(entries) {
  3184. var index = -1,
  3185. length = entries == null ? 0 : entries.length;
  3186. this.clear();
  3187. while (++index < length) {
  3188. var entry = entries[index];
  3189. this.set(entry[0], entry[1]);
  3190. }
  3191. }
  3192. /**
  3193. * Removes all key-value entries from the map.
  3194. *
  3195. * @private
  3196. * @name clear
  3197. * @memberOf MapCache
  3198. */
  3199. function mapCacheClear() {
  3200. this.size = 0;
  3201. this.__data__ = {
  3202. 'hash': new Hash,
  3203. 'map': new (Map || ListCache),
  3204. 'string': new Hash
  3205. };
  3206. }
  3207. /**
  3208. * Removes `key` and its value from the map.
  3209. *
  3210. * @private
  3211. * @name delete
  3212. * @memberOf MapCache
  3213. * @param {string} key The key of the value to remove.
  3214. * @returns {boolean} Returns `true` if the entry was removed, else `false`.
  3215. */
  3216. function mapCacheDelete(key) {
  3217. var result = getMapData(this, key)['delete'](key);
  3218. this.size -= result ? 1 : 0;
  3219. return result;
  3220. }
  3221. /**
  3222. * Gets the map value for `key`.
  3223. *
  3224. * @private
  3225. * @name get
  3226. * @memberOf MapCache
  3227. * @param {string} key The key of the value to get.
  3228. * @returns {*} Returns the entry value.
  3229. */
  3230. function mapCacheGet(key) {
  3231. return getMapData(this, key).get(key);
  3232. }
  3233. /**
  3234. * Checks if a map value for `key` exists.
  3235. *
  3236. * @private
  3237. * @name has
  3238. * @memberOf MapCache
  3239. * @param {string} key The key of the entry to check.
  3240. * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
  3241. */
  3242. function mapCacheHas(key) {
  3243. return getMapData(this, key).has(key);
  3244. }
  3245. /**
  3246. * Sets the map `key` to `value`.
  3247. *
  3248. * @private
  3249. * @name set
  3250. * @memberOf MapCache
  3251. * @param {string} key The key of the value to set.
  3252. * @param {*} value The value to set.
  3253. * @returns {Object} Returns the map cache instance.
  3254. */
  3255. function mapCacheSet(key, value) {
  3256. var data = getMapData(this, key),
  3257. size = data.size;
  3258. data.set(key, value);
  3259. this.size += data.size == size ? 0 : 1;
  3260. return this;
  3261. }
  3262. // Add methods to `MapCache`.
  3263. MapCache.prototype.clear = mapCacheClear;
  3264. MapCache.prototype['delete'] = mapCacheDelete;
  3265. MapCache.prototype.get = mapCacheGet;
  3266. MapCache.prototype.has = mapCacheHas;
  3267. MapCache.prototype.set = mapCacheSet;
  3268. /*------------------------------------------------------------------------*/
  3269. /**
  3270. *
  3271. * Creates an array cache object to store unique values.
  3272. *
  3273. * @private
  3274. * @constructor
  3275. * @param {Array} [values] The values to cache.
  3276. */
  3277. function SetCache(values) {
  3278. var index = -1,
  3279. length = values == null ? 0 : values.length;
  3280. this.__data__ = new MapCache;
  3281. while (++index < length) {
  3282. this.add(values[index]);
  3283. }
  3284. }
  3285. /**
  3286. * Adds `value` to the array cache.
  3287. *
  3288. * @private
  3289. * @name add
  3290. * @memberOf SetCache
  3291. * @alias push
  3292. * @param {*} value The value to cache.
  3293. * @returns {Object} Returns the cache instance.
  3294. */
  3295. function setCacheAdd(value) {
  3296. this.__data__.set(value, HASH_UNDEFINED);
  3297. return this;
  3298. }
  3299. /**
  3300. * Checks if `value` is in the array cache.
  3301. *
  3302. * @private
  3303. * @name has
  3304. * @memberOf SetCache
  3305. * @param {*} value The value to search for.
  3306. * @returns {number} Returns `true` if `value` is found, else `false`.
  3307. */
  3308. function setCacheHas(value) {
  3309. return this.__data__.has(value);
  3310. }
  3311. // Add methods to `SetCache`.
  3312. SetCache.prototype.add = SetCache.prototype.push = setCacheAdd;
  3313. SetCache.prototype.has = setCacheHas;
  3314. /*------------------------------------------------------------------------*/
  3315. /**
  3316. * Creates a stack cache object to store key-value pairs.
  3317. *
  3318. * @private
  3319. * @constructor
  3320. * @param {Array} [entries] The key-value pairs to cache.
  3321. */
  3322. function Stack(entries) {
  3323. var data = this.__data__ = new ListCache(entries);
  3324. this.size = data.size;
  3325. }
  3326. /**
  3327. * Removes all key-value entries from the stack.
  3328. *
  3329. * @private
  3330. * @name clear
  3331. * @memberOf Stack
  3332. */
  3333. function stackClear() {
  3334. this.__data__ = new ListCache;
  3335. this.size = 0;
  3336. }
  3337. /**
  3338. * Removes `key` and its value from the stack.
  3339. *
  3340. * @private
  3341. * @name delete
  3342. * @memberOf Stack
  3343. * @param {string} key The key of the value to remove.
  3344. * @returns {boolean} Returns `true` if the entry was removed, else `false`.
  3345. */
  3346. function stackDelete(key) {
  3347. var data = this.__data__,
  3348. result = data['delete'](key);
  3349. this.size = data.size;
  3350. return result;
  3351. }
  3352. /**
  3353. * Gets the stack value for `key`.
  3354. *
  3355. * @private
  3356. * @name get
  3357. * @memberOf Stack
  3358. * @param {string} key The key of the value to get.
  3359. * @returns {*} Returns the entry value.
  3360. */
  3361. function stackGet(key) {
  3362. return this.__data__.get(key);
  3363. }
  3364. /**
  3365. * Checks if a stack value for `key` exists.
  3366. *
  3367. * @private
  3368. * @name has
  3369. * @memberOf Stack
  3370. * @param {string} key The key of the entry to check.
  3371. * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
  3372. */
  3373. function stackHas(key) {
  3374. return this.__data__.has(key);
  3375. }
  3376. /**
  3377. * Sets the stack `key` to `value`.
  3378. *
  3379. * @private
  3380. * @name set
  3381. * @memberOf Stack
  3382. * @param {string} key The key of the value to set.
  3383. * @param {*} value The value to set.
  3384. * @returns {Object} Returns the stack cache instance.
  3385. */
  3386. function stackSet(key, value) {
  3387. var data = this.__data__;
  3388. if (data instanceof ListCache) {
  3389. var pairs = data.__data__;
  3390. if (!Map || (pairs.length < LARGE_ARRAY_SIZE - 1)) {
  3391. pairs.push([key, value]);
  3392. this.size = ++data.size;
  3393. return this;
  3394. }
  3395. data = this.__data__ = new MapCache(pairs);
  3396. }
  3397. data.set(key, value);
  3398. this.size = data.size;
  3399. return this;
  3400. }
  3401. // Add methods to `Stack`.
  3402. Stack.prototype.clear = stackClear;
  3403. Stack.prototype['delete'] = stackDelete;
  3404. Stack.prototype.get = stackGet;
  3405. Stack.prototype.has = stackHas;
  3406. Stack.prototype.set = stackSet;
  3407. /*------------------------------------------------------------------------*/
  3408. /**
  3409. * Creates an array of the enumerable property names of the array-like `value`.
  3410. *
  3411. * @private
  3412. * @param {*} value The value to query.
  3413. * @param {boolean} inherited Specify returning inherited property names.
  3414. * @returns {Array} Returns the array of property names.
  3415. */
  3416. function arrayLikeKeys(value, inherited) {
  3417. var isArr = isArray(value),
  3418. isArg = !isArr && isArguments(value),
  3419. isBuff = !isArr && !isArg && isBuffer(value),
  3420. isType = !isArr && !isArg && !isBuff && isTypedArray(value),
  3421. skipIndexes = isArr || isArg || isBuff || isType,
  3422. result = skipIndexes ? baseTimes(value.length, String) : [],
  3423. length = result.length;
  3424. for (var key in value) {
  3425. if ((inherited || hasOwnProperty.call(value, key)) &&
  3426. !(skipIndexes && (
  3427. // Safari 9 has enumerable `arguments.length` in strict mode.
  3428. key == 'length' ||
  3429. // Node.js 0.10 has enumerable non-index properties on buffers.
  3430. (isBuff && (key == 'offset' || key == 'parent')) ||
  3431. // PhantomJS 2 has enumerable non-index properties on typed arrays.
  3432. (isType && (key == 'buffer' || key == 'byteLength' || key == 'byteOffset')) ||
  3433. // Skip index properties.
  3434. isIndex(key, length)
  3435. ))) {
  3436. result.push(key);
  3437. }
  3438. }
  3439. return result;
  3440. }
  3441. /**
  3442. * A specialized version of `_.sample` for arrays.
  3443. *
  3444. * @private
  3445. * @param {Array} array The array to sample.
  3446. * @returns {*} Returns the random element.
  3447. */
  3448. function arraySample(array) {
  3449. var length = array.length;
  3450. return length ? array[baseRandom(0, length - 1)] : undefined;
  3451. }
  3452. /**
  3453. * A specialized version of `_.sampleSize` for arrays.
  3454. *
  3455. * @private
  3456. * @param {Array} array The array to sample.
  3457. * @param {number} n The number of elements to sample.
  3458. * @returns {Array} Returns the random elements.
  3459. */
  3460. function arraySampleSize(array, n) {
  3461. return shuffleSelf(copyArray(array), baseClamp(n, 0, array.length));
  3462. }
  3463. /**
  3464. * A specialized version of `_.shuffle` for arrays.
  3465. *
  3466. * @private
  3467. * @param {Array} array The array to shuffle.
  3468. * @returns {Array} Returns the new shuffled array.
  3469. */
  3470. function arrayShuffle(array) {
  3471. return shuffleSelf(copyArray(array));
  3472. }
  3473. /**
  3474. * This function is like `assignValue` except that it doesn't assign
  3475. * `undefined` values.
  3476. *
  3477. * @private
  3478. * @param {Object} object The object to modify.
  3479. * @param {string} key The key of the property to assign.
  3480. * @param {*} value The value to assign.
  3481. */
  3482. function assignMergeValue(object, key, value) {
  3483. if ((value !== undefined && !eq(object[key], value)) ||
  3484. (value === undefined && !(key in object))) {
  3485. baseAssignValue(object, key, value);
  3486. }
  3487. }
  3488. /**
  3489. * Assigns `value` to `key` of `object` if the existing value is not equivalent
  3490. * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
  3491. * for equality comparisons.
  3492. *
  3493. * @private
  3494. * @param {Object} object The object to modify.
  3495. * @param {string} key The key of the property to assign.
  3496. * @param {*} value The value to assign.
  3497. */
  3498. function assignValue(object, key, value) {
  3499. var objValue = object[key];
  3500. if (!(hasOwnProperty.call(object, key) && eq(objValue, value)) ||
  3501. (value === undefined && !(key in object))) {
  3502. baseAssignValue(object, key, value);
  3503. }
  3504. }
  3505. /**
  3506. * Gets the index at which the `key` is found in `array` of key-value pairs.
  3507. *
  3508. * @private
  3509. * @param {Array} array The array to inspect.
  3510. * @param {*} key The key to search for.
  3511. * @returns {number} Returns the index of the matched value, else `-1`.
  3512. */
  3513. function assocIndexOf(array, key) {
  3514. var length = array.length;
  3515. while (length--) {
  3516. if (eq(array[length][0], key)) {
  3517. return length;
  3518. }
  3519. }
  3520. return -1;
  3521. }
  3522. /**
  3523. * Aggregates elements of `collection` on `accumulator` with keys transformed
  3524. * by `iteratee` and values set by `setter`.
  3525. *
  3526. * @private
  3527. * @param {Array|Object} collection The collection to iterate over.
  3528. * @param {Function} setter The function to set `accumulator` values.
  3529. * @param {Function} iteratee The iteratee to transform keys.
  3530. * @param {Object} accumulator The initial aggregated object.
  3531. * @returns {Function} Returns `accumulator`.
  3532. */
  3533. function baseAggregator(collection, setter, iteratee, accumulator) {
  3534. baseEach(collection, function(value, key, collection) {
  3535. setter(accumulator, value, iteratee(value), collection);
  3536. });
  3537. return accumulator;
  3538. }
  3539. /**
  3540. * The base implementation of `_.assign` without support for multiple sources
  3541. * or `customizer` functions.
  3542. *
  3543. * @private
  3544. * @param {Object} object The destination object.
  3545. * @param {Object} source The source object.
  3546. * @returns {Object} Returns `object`.
  3547. */
  3548. function baseAssign(object, source) {
  3549. return object && copyObject(source, keys(source), object);
  3550. }
  3551. /**
  3552. * The base implementation of `_.assignIn` without support for multiple sources
  3553. * or `customizer` functions.
  3554. *
  3555. * @private
  3556. * @param {Object} object The destination object.
  3557. * @param {Object} source The source object.
  3558. * @returns {Object} Returns `object`.
  3559. */
  3560. function baseAssignIn(object, source) {
  3561. return object && copyObject(source, keysIn(source), object);
  3562. }
  3563. /**
  3564. * The base implementation of `assignValue` and `assignMergeValue` without
  3565. * value checks.
  3566. *
  3567. * @private
  3568. * @param {Object} object The object to modify.
  3569. * @param {string} key The key of the property to assign.
  3570. * @param {*} value The value to assign.
  3571. */
  3572. function baseAssignValue(object, key, value) {
  3573. if (key == '__proto__' && defineProperty) {
  3574. defineProperty(object, key, {
  3575. 'configurable': true,
  3576. 'enumerable': true,
  3577. 'value': value,
  3578. 'writable': true
  3579. });
  3580. } else {
  3581. object[key] = value;
  3582. }
  3583. }
  3584. /**
  3585. * The base implementation of `_.at` without support for individual paths.
  3586. *
  3587. * @private
  3588. * @param {Object} object The object to iterate over.
  3589. * @param {string[]} paths The property paths to pick.
  3590. * @returns {Array} Returns the picked elements.
  3591. */
  3592. function baseAt(object, paths) {
  3593. var index = -1,
  3594. length = paths.length,
  3595. result = Array(length),
  3596. skip = object == null;
  3597. while (++index < length) {
  3598. result[index] = skip ? undefined : get(object, paths[index]);
  3599. }
  3600. return result;
  3601. }
  3602. /**
  3603. * The base implementation of `_.clamp` which doesn't coerce arguments.
  3604. *
  3605. * @private
  3606. * @param {number} number The number to clamp.
  3607. * @param {number} [lower] The lower bound.
  3608. * @param {number} upper The upper bound.
  3609. * @returns {number} Returns the clamped number.
  3610. */
  3611. function baseClamp(number, lower, upper) {
  3612. if (number === number) {
  3613. if (upper !== undefined) {
  3614. number = number <= upper ? number : upper;
  3615. }
  3616. if (lower !== undefined) {
  3617. number = number >= lower ? number : lower;
  3618. }
  3619. }
  3620. return number;
  3621. }
  3622. /**
  3623. * The base implementation of `_.clone` and `_.cloneDeep` which tracks
  3624. * traversed objects.
  3625. *
  3626. * @private
  3627. * @param {*} value The value to clone.
  3628. * @param {boolean} bitmask The bitmask flags.
  3629. * 1 - Deep clone
  3630. * 2 - Flatten inherited properties
  3631. * 4 - Clone symbols
  3632. * @param {Function} [customizer] The function to customize cloning.
  3633. * @param {string} [key] The key of `value`.
  3634. * @param {Object} [object] The parent object of `value`.
  3635. * @param {Object} [stack] Tracks traversed objects and their clone counterparts.
  3636. * @returns {*} Returns the cloned value.
  3637. */
  3638. function baseClone(value, bitmask, customizer, key, object, stack) {
  3639. var result,
  3640. isDeep = bitmask & CLONE_DEEP_FLAG,
  3641. isFlat = bitmask & CLONE_FLAT_FLAG,
  3642. isFull = bitmask & CLONE_SYMBOLS_FLAG;
  3643. if (customizer) {
  3644. result = object ? customizer(value, key, object, stack) : customizer(value);
  3645. }
  3646. if (result !== undefined) {
  3647. return result;
  3648. }
  3649. if (!isObject(value)) {
  3650. return value;
  3651. }
  3652. var isArr = isArray(value);
  3653. if (isArr) {
  3654. result = initCloneArray(value);
  3655. if (!isDeep) {
  3656. return copyArray(value, result);
  3657. }
  3658. } else {
  3659. var tag = getTag(value),
  3660. isFunc = tag == funcTag || tag == genTag;
  3661. if (isBuffer(value)) {
  3662. return cloneBuffer(value, isDeep);
  3663. }
  3664. if (tag == objectTag || tag == argsTag || (isFunc && !object)) {
  3665. result = (isFlat || isFunc) ? {} : initCloneObject(value);
  3666. if (!isDeep) {
  3667. return isFlat
  3668. ? copySymbolsIn(value, baseAssignIn(result, value))
  3669. : copySymbols(value, baseAssign(result, value));
  3670. }
  3671. } else {
  3672. if (!cloneableTags[tag]) {
  3673. return object ? value : {};
  3674. }
  3675. result = initCloneByTag(value, tag, isDeep);
  3676. }
  3677. }
  3678. // Check for circular references and return its corresponding clone.
  3679. stack || (stack = new Stack);
  3680. var stacked = stack.get(value);
  3681. if (stacked) {
  3682. return stacked;
  3683. }
  3684. stack.set(value, result);
  3685. if (isSet(value)) {
  3686. value.forEach(function(subValue) {
  3687. result.add(baseClone(subValue, bitmask, customizer, subValue, value, stack));
  3688. });
  3689. return result;
  3690. }
  3691. if (isMap(value)) {
  3692. value.forEach(function(subValue, key) {
  3693. result.set(key, baseClone(subValue, bitmask, customizer, key, value, stack));
  3694. });
  3695. return result;
  3696. }
  3697. var keysFunc = isFull
  3698. ? (isFlat ? getAllKeysIn : getAllKeys)
  3699. : (isFlat ? keysIn : keys);
  3700. var props = isArr ? undefined : keysFunc(value);
  3701. arrayEach(props || value, function(subValue, key) {
  3702. if (props) {
  3703. key = subValue;
  3704. subValue = value[key];
  3705. }
  3706. // Recursively populate clone (susceptible to call stack limits).
  3707. assignValue(result, key, baseClone(subValue, bitmask, customizer, key, value, stack));
  3708. });
  3709. return result;
  3710. }
  3711. /**
  3712. * The base implementation of `_.conforms` which doesn't clone `source`.
  3713. *
  3714. * @private
  3715. * @param {Object} source The object of property predicates to conform to.
  3716. * @returns {Function} Returns the new spec function.
  3717. */
  3718. function baseConforms(source) {
  3719. var props = keys(source);
  3720. return function(object) {
  3721. return baseConformsTo(object, source, props);
  3722. };
  3723. }
  3724. /**
  3725. * The base implementation of `_.conformsTo` which accepts `props` to check.
  3726. *
  3727. * @private
  3728. * @param {Object} object The object to inspect.
  3729. * @param {Object} source The object of property predicates to conform to.
  3730. * @returns {boolean} Returns `true` if `object` conforms, else `false`.
  3731. */
  3732. function baseConformsTo(object, source, props) {
  3733. var length = props.length;
  3734. if (object == null) {
  3735. return !length;
  3736. }
  3737. object = Object(object);
  3738. while (length--) {
  3739. var key = props[length],
  3740. predicate = source[key],
  3741. value = object[key];
  3742. if ((value === undefined && !(key in object)) || !predicate(value)) {
  3743. return false;
  3744. }
  3745. }
  3746. return true;
  3747. }
  3748. /**
  3749. * The base implementation of `_.delay` and `_.defer` which accepts `args`
  3750. * to provide to `func`.
  3751. *
  3752. * @private
  3753. * @param {Function} func The function to delay.
  3754. * @param {number} wait The number of milliseconds to delay invocation.
  3755. * @param {Array} args The arguments to provide to `func`.
  3756. * @returns {number|Object} Returns the timer id or timeout object.
  3757. */
  3758. function baseDelay(func, wait, args) {
  3759. if (typeof func != 'function') {
  3760. throw new TypeError(FUNC_ERROR_TEXT);
  3761. }
  3762. return setTimeout(function() { func.apply(undefined, args); }, wait);
  3763. }
  3764. /**
  3765. * The base implementation of methods like `_.difference` without support
  3766. * for excluding multiple arrays or iteratee shorthands.
  3767. *
  3768. * @private
  3769. * @param {Array} array The array to inspect.
  3770. * @param {Array} values The values to exclude.
  3771. * @param {Function} [iteratee] The iteratee invoked per element.
  3772. * @param {Function} [comparator] The comparator invoked per element.
  3773. * @returns {Array} Returns the new array of filtered values.
  3774. */
  3775. function baseDifference(array, values, iteratee, comparator) {
  3776. var index = -1,
  3777. includes = arrayIncludes,
  3778. isCommon = true,
  3779. length = array.length,
  3780. result = [],
  3781. valuesLength = values.length;
  3782. if (!length) {
  3783. return result;
  3784. }
  3785. if (iteratee) {
  3786. values = arrayMap(values, baseUnary(iteratee));
  3787. }
  3788. if (comparator) {
  3789. includes = arrayIncludesWith;
  3790. isCommon = false;
  3791. }
  3792. else if (values.length >= LARGE_ARRAY_SIZE) {
  3793. includes = cacheHas;
  3794. isCommon = false;
  3795. values = new SetCache(values);
  3796. }
  3797. outer:
  3798. while (++index < length) {
  3799. var value = array[index],
  3800. computed = iteratee == null ? value : iteratee(value);
  3801. value = (comparator || value !== 0) ? value : 0;
  3802. if (isCommon && computed === computed) {
  3803. var valuesIndex = valuesLength;
  3804. while (valuesIndex--) {
  3805. if (values[valuesIndex] === computed) {
  3806. continue outer;
  3807. }
  3808. }
  3809. result.push(value);
  3810. }
  3811. else if (!includes(values, computed, comparator)) {
  3812. result.push(value);
  3813. }
  3814. }
  3815. return result;
  3816. }
  3817. /**
  3818. * The base implementation of `_.forEach` without support for iteratee shorthands.
  3819. *
  3820. * @private
  3821. * @param {Array|Object} collection The collection to iterate over.
  3822. * @param {Function} iteratee The function invoked per iteration.
  3823. * @returns {Array|Object} Returns `collection`.
  3824. */
  3825. var baseEach = createBaseEach(baseForOwn);
  3826. /**
  3827. * The base implementation of `_.forEachRight` without support for iteratee shorthands.
  3828. *
  3829. * @private
  3830. * @param {Array|Object} collection The collection to iterate over.
  3831. * @param {Function} iteratee The function invoked per iteration.
  3832. * @returns {Array|Object} Returns `collection`.
  3833. */
  3834. var baseEachRight = createBaseEach(baseForOwnRight, true);
  3835. /**
  3836. * The base implementation of `_.every` without support for iteratee shorthands.
  3837. *
  3838. * @private
  3839. * @param {Array|Object} collection The collection to iterate over.
  3840. * @param {Function} predicate The function invoked per iteration.
  3841. * @returns {boolean} Returns `true` if all elements pass the predicate check,
  3842. * else `false`
  3843. */
  3844. function baseEvery(collection, predicate) {
  3845. var result = true;
  3846. baseEach(collection, function(value, index, collection) {
  3847. result = !!predicate(value, index, collection);
  3848. return result;
  3849. });
  3850. return result;
  3851. }
  3852. /**
  3853. * The base implementation of methods like `_.max` and `_.min` which accepts a
  3854. * `comparator` to determine the extremum value.
  3855. *
  3856. * @private
  3857. * @param {Array} array The array to iterate over.
  3858. * @param {Function} iteratee The iteratee invoked per iteration.
  3859. * @param {Function} comparator The comparator used to compare values.
  3860. * @returns {*} Returns the extremum value.
  3861. */
  3862. function baseExtremum(array, iteratee, comparator) {
  3863. var index = -1,
  3864. length = array.length;
  3865. while (++index < length) {
  3866. var value = array[index],
  3867. current = iteratee(value);
  3868. if (current != null && (computed === undefined
  3869. ? (current === current && !isSymbol(current))
  3870. : comparator(current, computed)
  3871. )) {
  3872. var computed = current,
  3873. result = value;
  3874. }
  3875. }
  3876. return result;
  3877. }
  3878. /**
  3879. * The base implementation of `_.fill` without an iteratee call guard.
  3880. *
  3881. * @private
  3882. * @param {Array} array The array to fill.
  3883. * @param {*} value The value to fill `array` with.
  3884. * @param {number} [start=0] The start position.
  3885. * @param {number} [end=array.length] The end position.
  3886. * @returns {Array} Returns `array`.
  3887. */
  3888. function baseFill(array, value, start, end) {
  3889. var length = array.length;
  3890. start = toInteger(start);
  3891. if (start < 0) {
  3892. start = -start > length ? 0 : (length + start);
  3893. }
  3894. end = (end === undefined || end > length) ? length : toInteger(end);
  3895. if (end < 0) {
  3896. end += length;
  3897. }
  3898. end = start > end ? 0 : toLength(end);
  3899. while (start < end) {
  3900. array[start++] = value;
  3901. }
  3902. return array;
  3903. }
  3904. /**
  3905. * The base implementation of `_.filter` without support for iteratee shorthands.
  3906. *
  3907. * @private
  3908. * @param {Array|Object} collection The collection to iterate over.
  3909. * @param {Function} predicate The function invoked per iteration.
  3910. * @returns {Array} Returns the new filtered array.
  3911. */
  3912. function baseFilter(collection, predicate) {
  3913. var result = [];
  3914. baseEach(collection, function(value, index, collection) {
  3915. if (predicate(value, index, collection)) {
  3916. result.push(value);
  3917. }
  3918. });
  3919. return result;
  3920. }
  3921. /**
  3922. * The base implementation of `_.flatten` with support for restricting flattening.
  3923. *
  3924. * @private
  3925. * @param {Array} array The array to flatten.
  3926. * @param {number} depth The maximum recursion depth.
  3927. * @param {boolean} [predicate=isFlattenable] The function invoked per iteration.
  3928. * @param {boolean} [isStrict] Restrict to values that pass `predicate` checks.
  3929. * @param {Array} [result=[]] The initial result value.
  3930. * @returns {Array} Returns the new flattened array.
  3931. */
  3932. function baseFlatten(array, depth, predicate, isStrict, result) {
  3933. var index = -1,
  3934. length = array.length;
  3935. predicate || (predicate = isFlattenable);
  3936. result || (result = []);
  3937. while (++index < length) {
  3938. var value = array[index];
  3939. if (depth > 0 && predicate(value)) {
  3940. if (depth > 1) {
  3941. // Recursively flatten arrays (susceptible to call stack limits).
  3942. baseFlatten(value, depth - 1, predicate, isStrict, result);
  3943. } else {
  3944. arrayPush(result, value);
  3945. }
  3946. } else if (!isStrict) {
  3947. result[result.length] = value;
  3948. }
  3949. }
  3950. return result;
  3951. }
  3952. /**
  3953. * The base implementation of `baseForOwn` which iterates over `object`
  3954. * properties returned by `keysFunc` and invokes `iteratee` for each property.
  3955. * Iteratee functions may exit iteration early by explicitly returning `false`.
  3956. *
  3957. * @private
  3958. * @param {Object} object The object to iterate over.
  3959. * @param {Function} iteratee The function invoked per iteration.
  3960. * @param {Function} keysFunc The function to get the keys of `object`.
  3961. * @returns {Object} Returns `object`.
  3962. */
  3963. var baseFor = createBaseFor();
  3964. /**
  3965. * This function is like `baseFor` except that it iterates over properties
  3966. * in the opposite order.
  3967. *
  3968. * @private
  3969. * @param {Object} object The object to iterate over.
  3970. * @param {Function} iteratee The function invoked per iteration.
  3971. * @param {Function} keysFunc The function to get the keys of `object`.
  3972. * @returns {Object} Returns `object`.
  3973. */
  3974. var baseForRight = createBaseFor(true);
  3975. /**
  3976. * The base implementation of `_.forOwn` without support for iteratee shorthands.
  3977. *
  3978. * @private
  3979. * @param {Object} object The object to iterate over.
  3980. * @param {Function} iteratee The function invoked per iteration.
  3981. * @returns {Object} Returns `object`.
  3982. */
  3983. function baseForOwn(object, iteratee) {
  3984. return object && baseFor(object, iteratee, keys);
  3985. }
  3986. /**
  3987. * The base implementation of `_.forOwnRight` without support for iteratee shorthands.
  3988. *
  3989. * @private
  3990. * @param {Object} object The object to iterate over.
  3991. * @param {Function} iteratee The function invoked per iteration.
  3992. * @returns {Object} Returns `object`.
  3993. */
  3994. function baseForOwnRight(object, iteratee) {
  3995. return object && baseForRight(object, iteratee, keys);
  3996. }
  3997. /**
  3998. * The base implementation of `_.functions` which creates an array of
  3999. * `object` function property names filtered from `props`.
  4000. *
  4001. * @private
  4002. * @param {Object} object The object to inspect.
  4003. * @param {Array} props The property names to filter.
  4004. * @returns {Array} Returns the function names.
  4005. */
  4006. function baseFunctions(object, props) {
  4007. return arrayFilter(props, function(key) {
  4008. return isFunction(object[key]);
  4009. });
  4010. }
  4011. /**
  4012. * The base implementation of `_.get` without support for default values.
  4013. *
  4014. * @private
  4015. * @param {Object} object The object to query.
  4016. * @param {Array|string} path The path of the property to get.
  4017. * @returns {*} Returns the resolved value.
  4018. */
  4019. function baseGet(object, path) {
  4020. path = castPath(path, object);
  4021. var index = 0,
  4022. length = path.length;
  4023. while (object != null && index < length) {
  4024. object = object[toKey(path[index++])];
  4025. }
  4026. return (index && index == length) ? object : undefined;
  4027. }
  4028. /**
  4029. * The base implementation of `getAllKeys` and `getAllKeysIn` which uses
  4030. * `keysFunc` and `symbolsFunc` to get the enumerable property names and
  4031. * symbols of `object`.
  4032. *
  4033. * @private
  4034. * @param {Object} object The object to query.
  4035. * @param {Function} keysFunc The function to get the keys of `object`.
  4036. * @param {Function} symbolsFunc The function to get the symbols of `object`.
  4037. * @returns {Array} Returns the array of property names and symbols.
  4038. */
  4039. function baseGetAllKeys(object, keysFunc, symbolsFunc) {
  4040. var result = keysFunc(object);
  4041. return isArray(object) ? result : arrayPush(result, symbolsFunc(object));
  4042. }
  4043. /**
  4044. * The base implementation of `getTag` without fallbacks for buggy environments.
  4045. *
  4046. * @private
  4047. * @param {*} value The value to query.
  4048. * @returns {string} Returns the `toStringTag`.
  4049. */
  4050. function baseGetTag(value) {
  4051. if (value == null) {
  4052. return value === undefined ? undefinedTag : nullTag;
  4053. }
  4054. return (symToStringTag && symToStringTag in Object(value))
  4055. ? getRawTag(value)
  4056. : objectToString(value);
  4057. }
  4058. /**
  4059. * The base implementation of `_.gt` which doesn't coerce arguments.
  4060. *
  4061. * @private
  4062. * @param {*} value The value to compare.
  4063. * @param {*} other The other value to compare.
  4064. * @returns {boolean} Returns `true` if `value` is greater than `other`,
  4065. * else `false`.
  4066. */
  4067. function baseGt(value, other) {
  4068. return value > other;
  4069. }
  4070. /**
  4071. * The base implementation of `_.has` without support for deep paths.
  4072. *
  4073. * @private
  4074. * @param {Object} [object] The object to query.
  4075. * @param {Array|string} key The key to check.
  4076. * @returns {boolean} Returns `true` if `key` exists, else `false`.
  4077. */
  4078. function baseHas(object, key) {
  4079. return object != null && hasOwnProperty.call(object, key);
  4080. }
  4081. /**
  4082. * The base implementation of `_.hasIn` without support for deep paths.
  4083. *
  4084. * @private
  4085. * @param {Object} [object] The object to query.
  4086. * @param {Array|string} key The key to check.
  4087. * @returns {boolean} Returns `true` if `key` exists, else `false`.
  4088. */
  4089. function baseHasIn(object, key) {
  4090. return object != null && key in Object(object);
  4091. }
  4092. /**
  4093. * The base implementation of `_.inRange` which doesn't coerce arguments.
  4094. *
  4095. * @private
  4096. * @param {number} number The number to check.
  4097. * @param {number} start The start of the range.
  4098. * @param {number} end The end of the range.
  4099. * @returns {boolean} Returns `true` if `number` is in the range, else `false`.
  4100. */
  4101. function baseInRange(number, start, end) {
  4102. return number >= nativeMin(start, end) && number < nativeMax(start, end);
  4103. }
  4104. /**
  4105. * The base implementation of methods like `_.intersection`, without support
  4106. * for iteratee shorthands, that accepts an array of arrays to inspect.
  4107. *
  4108. * @private
  4109. * @param {Array} arrays The arrays to inspect.
  4110. * @param {Function} [iteratee] The iteratee invoked per element.
  4111. * @param {Function} [comparator] The comparator invoked per element.
  4112. * @returns {Array} Returns the new array of shared values.
  4113. */
  4114. function baseIntersection(arrays, iteratee, comparator) {
  4115. var includes = comparator ? arrayIncludesWith : arrayIncludes,
  4116. length = arrays[0].length,
  4117. othLength = arrays.length,
  4118. othIndex = othLength,
  4119. caches = Array(othLength),
  4120. maxLength = Infinity,
  4121. result = [];
  4122. while (othIndex--) {
  4123. var array = arrays[othIndex];
  4124. if (othIndex && iteratee) {
  4125. array = arrayMap(array, baseUnary(iteratee));
  4126. }
  4127. maxLength = nativeMin(array.length, maxLength);
  4128. caches[othIndex] = !comparator && (iteratee || (length >= 120 && array.length >= 120))
  4129. ? new SetCache(othIndex && array)
  4130. : undefined;
  4131. }
  4132. array = arrays[0];
  4133. var index = -1,
  4134. seen = caches[0];
  4135. outer:
  4136. while (++index < length && result.length < maxLength) {
  4137. var value = array[index],
  4138. computed = iteratee ? iteratee(value) : value;
  4139. value = (comparator || value !== 0) ? value : 0;
  4140. if (!(seen
  4141. ? cacheHas(seen, computed)
  4142. : includes(result, computed, comparator)
  4143. )) {
  4144. othIndex = othLength;
  4145. while (--othIndex) {
  4146. var cache = caches[othIndex];
  4147. if (!(cache
  4148. ? cacheHas(cache, computed)
  4149. : includes(arrays[othIndex], computed, comparator))
  4150. ) {
  4151. continue outer;
  4152. }
  4153. }
  4154. if (seen) {
  4155. seen.push(computed);
  4156. }
  4157. result.push(value);
  4158. }
  4159. }
  4160. return result;
  4161. }
  4162. /**
  4163. * The base implementation of `_.invert` and `_.invertBy` which inverts
  4164. * `object` with values transformed by `iteratee` and set by `setter`.
  4165. *
  4166. * @private
  4167. * @param {Object} object The object to iterate over.
  4168. * @param {Function} setter The function to set `accumulator` values.
  4169. * @param {Function} iteratee The iteratee to transform values.
  4170. * @param {Object} accumulator The initial inverted object.
  4171. * @returns {Function} Returns `accumulator`.
  4172. */
  4173. function baseInverter(object, setter, iteratee, accumulator) {
  4174. baseForOwn(object, function(value, key, object) {
  4175. setter(accumulator, iteratee(value), key, object);
  4176. });
  4177. return accumulator;
  4178. }
  4179. /**
  4180. * The base implementation of `_.invoke` without support for individual
  4181. * method arguments.
  4182. *
  4183. * @private
  4184. * @param {Object} object The object to query.
  4185. * @param {Array|string} path The path of the method to invoke.
  4186. * @param {Array} args The arguments to invoke the method with.
  4187. * @returns {*} Returns the result of the invoked method.
  4188. */
  4189. function baseInvoke(object, path, args) {
  4190. path = castPath(path, object);
  4191. object = parent(object, path);
  4192. var func = object == null ? object : object[toKey(last(path))];
  4193. return func == null ? undefined : apply(func, object, args);
  4194. }
  4195. /**
  4196. * The base implementation of `_.isArguments`.
  4197. *
  4198. * @private
  4199. * @param {*} value The value to check.
  4200. * @returns {boolean} Returns `true` if `value` is an `arguments` object,
  4201. */
  4202. function baseIsArguments(value) {
  4203. return isObjectLike(value) && baseGetTag(value) == argsTag;
  4204. }
  4205. /**
  4206. * The base implementation of `_.isArrayBuffer` without Node.js optimizations.
  4207. *
  4208. * @private
  4209. * @param {*} value The value to check.
  4210. * @returns {boolean} Returns `true` if `value` is an array buffer, else `false`.
  4211. */
  4212. function baseIsArrayBuffer(value) {
  4213. return isObjectLike(value) && baseGetTag(value) == arrayBufferTag;
  4214. }
  4215. /**
  4216. * The base implementation of `_.isDate` without Node.js optimizations.
  4217. *
  4218. * @private
  4219. * @param {*} value The value to check.
  4220. * @returns {boolean} Returns `true` if `value` is a date object, else `false`.
  4221. */
  4222. function baseIsDate(value) {
  4223. return isObjectLike(value) && baseGetTag(value) == dateTag;
  4224. }
  4225. /**
  4226. * The base implementation of `_.isEqual` which supports partial comparisons
  4227. * and tracks traversed objects.
  4228. *
  4229. * @private
  4230. * @param {*} value The value to compare.
  4231. * @param {*} other The other value to compare.
  4232. * @param {boolean} bitmask The bitmask flags.
  4233. * 1 - Unordered comparison
  4234. * 2 - Partial comparison
  4235. * @param {Function} [customizer] The function to customize comparisons.
  4236. * @param {Object} [stack] Tracks traversed `value` and `other` objects.
  4237. * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
  4238. */
  4239. function baseIsEqual(value, other, bitmask, customizer, stack) {
  4240. if (value === other) {
  4241. return true;
  4242. }
  4243. if (value == null || other == null || (!isObjectLike(value) && !isObjectLike(other))) {
  4244. return value !== value && other !== other;
  4245. }
  4246. return baseIsEqualDeep(value, other, bitmask, customizer, baseIsEqual, stack);
  4247. }
  4248. /**
  4249. * A specialized version of `baseIsEqual` for arrays and objects which performs
  4250. * deep comparisons and tracks traversed objects enabling objects with circular
  4251. * references to be compared.
  4252. *
  4253. * @private
  4254. * @param {Object} object The object to compare.
  4255. * @param {Object} other The other object to compare.
  4256. * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.
  4257. * @param {Function} customizer The function to customize comparisons.
  4258. * @param {Function} equalFunc The function to determine equivalents of values.
  4259. * @param {Object} [stack] Tracks traversed `object` and `other` objects.
  4260. * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
  4261. */
  4262. function baseIsEqualDeep(object, other, bitmask, customizer, equalFunc, stack) {
  4263. var objIsArr = isArray(object),
  4264. othIsArr = isArray(other),
  4265. objTag = objIsArr ? arrayTag : getTag(object),
  4266. othTag = othIsArr ? arrayTag : getTag(other);
  4267. objTag = objTag == argsTag ? objectTag : objTag;
  4268. othTag = othTag == argsTag ? objectTag : othTag;
  4269. var objIsObj = objTag == objectTag,
  4270. othIsObj = othTag == objectTag,
  4271. isSameTag = objTag == othTag;
  4272. if (isSameTag && isBuffer(object)) {
  4273. if (!isBuffer(other)) {
  4274. return false;
  4275. }
  4276. objIsArr = true;
  4277. objIsObj = false;
  4278. }
  4279. if (isSameTag && !objIsObj) {
  4280. stack || (stack = new Stack);
  4281. return (objIsArr || isTypedArray(object))
  4282. ? equalArrays(object, other, bitmask, customizer, equalFunc, stack)
  4283. : equalByTag(object, other, objTag, bitmask, customizer, equalFunc, stack);
  4284. }
  4285. if (!(bitmask & COMPARE_PARTIAL_FLAG)) {
  4286. var objIsWrapped = objIsObj && hasOwnProperty.call(object, '__wrapped__'),
  4287. othIsWrapped = othIsObj && hasOwnProperty.call(other, '__wrapped__');
  4288. if (objIsWrapped || othIsWrapped) {
  4289. var objUnwrapped = objIsWrapped ? object.value() : object,
  4290. othUnwrapped = othIsWrapped ? other.value() : other;
  4291. stack || (stack = new Stack);
  4292. return equalFunc(objUnwrapped, othUnwrapped, bitmask, customizer, stack);
  4293. }
  4294. }
  4295. if (!isSameTag) {
  4296. return false;
  4297. }
  4298. stack || (stack = new Stack);
  4299. return equalObjects(object, other, bitmask, customizer, equalFunc, stack);
  4300. }
  4301. /**
  4302. * The base implementation of `_.isMap` without Node.js optimizations.
  4303. *
  4304. * @private
  4305. * @param {*} value The value to check.
  4306. * @returns {boolean} Returns `true` if `value` is a map, else `false`.
  4307. */
  4308. function baseIsMap(value) {
  4309. return isObjectLike(value) && getTag(value) == mapTag;
  4310. }
  4311. /**
  4312. * The base implementation of `_.isMatch` without support for iteratee shorthands.
  4313. *
  4314. * @private
  4315. * @param {Object} object The object to inspect.
  4316. * @param {Object} source The object of property values to match.
  4317. * @param {Array} matchData The property names, values, and compare flags to match.
  4318. * @param {Function} [customizer] The function to customize comparisons.
  4319. * @returns {boolean} Returns `true` if `object` is a match, else `false`.
  4320. */
  4321. function baseIsMatch(object, source, matchData, customizer) {
  4322. var index = matchData.length,
  4323. length = index,
  4324. noCustomizer = !customizer;
  4325. if (object == null) {
  4326. return !length;
  4327. }
  4328. object = Object(object);
  4329. while (index--) {
  4330. var data = matchData[index];
  4331. if ((noCustomizer && data[2])
  4332. ? data[1] !== object[data[0]]
  4333. : !(data[0] in object)
  4334. ) {
  4335. return false;
  4336. }
  4337. }
  4338. while (++index < length) {
  4339. data = matchData[index];
  4340. var key = data[0],
  4341. objValue = object[key],
  4342. srcValue = data[1];
  4343. if (noCustomizer && data[2]) {
  4344. if (objValue === undefined && !(key in object)) {
  4345. return false;
  4346. }
  4347. } else {
  4348. var stack = new Stack;
  4349. if (customizer) {
  4350. var result = customizer(objValue, srcValue, key, object, source, stack);
  4351. }
  4352. if (!(result === undefined
  4353. ? baseIsEqual(srcValue, objValue, COMPARE_PARTIAL_FLAG | COMPARE_UNORDERED_FLAG, customizer, stack)
  4354. : result
  4355. )) {
  4356. return false;
  4357. }
  4358. }
  4359. }
  4360. return true;
  4361. }
  4362. /**
  4363. * The base implementation of `_.isNative` without bad shim checks.
  4364. *
  4365. * @private
  4366. * @param {*} value The value to check.
  4367. * @returns {boolean} Returns `true` if `value` is a native function,
  4368. * else `false`.
  4369. */
  4370. function baseIsNative(value) {
  4371. if (!isObject(value) || isMasked(value)) {
  4372. return false;
  4373. }
  4374. var pattern = isFunction(value) ? reIsNative : reIsHostCtor;
  4375. return pattern.test(toSource(value));
  4376. }
  4377. /**
  4378. * The base implementation of `_.isRegExp` without Node.js optimizations.
  4379. *
  4380. * @private
  4381. * @param {*} value The value to check.
  4382. * @returns {boolean} Returns `true` if `value` is a regexp, else `false`.
  4383. */
  4384. function baseIsRegExp(value) {
  4385. return isObjectLike(value) && baseGetTag(value) == regexpTag;
  4386. }
  4387. /**
  4388. * The base implementation of `_.isSet` without Node.js optimizations.
  4389. *
  4390. * @private
  4391. * @param {*} value The value to check.
  4392. * @returns {boolean} Returns `true` if `value` is a set, else `false`.
  4393. */
  4394. function baseIsSet(value) {
  4395. return isObjectLike(value) && getTag(value) == setTag;
  4396. }
  4397. /**
  4398. * The base implementation of `_.isTypedArray` without Node.js optimizations.
  4399. *
  4400. * @private
  4401. * @param {*} value The value to check.
  4402. * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
  4403. */
  4404. function baseIsTypedArray(value) {
  4405. return isObjectLike(value) &&
  4406. isLength(value.length) && !!typedArrayTags[baseGetTag(value)];
  4407. }
  4408. /**
  4409. * The base implementation of `_.iteratee`.
  4410. *
  4411. * @private
  4412. * @param {*} [value=_.identity] The value to convert to an iteratee.
  4413. * @returns {Function} Returns the iteratee.
  4414. */
  4415. function baseIteratee(value) {
  4416. // Don't store the `typeof` result in a variable to avoid a JIT bug in Safari 9.
  4417. // See https://bugs.webkit.org/show_bug.cgi?id=156034 for more details.
  4418. if (typeof value == 'function') {
  4419. return value;
  4420. }
  4421. if (value == null) {
  4422. return identity;
  4423. }
  4424. if (typeof value == 'object') {
  4425. return isArray(value)
  4426. ? baseMatchesProperty(value[0], value[1])
  4427. : baseMatches(value);
  4428. }
  4429. return property(value);
  4430. }
  4431. /**
  4432. * The base implementation of `_.keys` which doesn't treat sparse arrays as dense.
  4433. *
  4434. * @private
  4435. * @param {Object} object The object to query.
  4436. * @returns {Array} Returns the array of property names.
  4437. */
  4438. function baseKeys(object) {
  4439. if (!isPrototype(object)) {
  4440. return nativeKeys(object);
  4441. }
  4442. var result = [];
  4443. for (var key in Object(object)) {
  4444. if (hasOwnProperty.call(object, key) && key != 'constructor') {
  4445. result.push(key);
  4446. }
  4447. }
  4448. return result;
  4449. }
  4450. /**
  4451. * The base implementation of `_.keysIn` which doesn't treat sparse arrays as dense.
  4452. *
  4453. * @private
  4454. * @param {Object} object The object to query.
  4455. * @returns {Array} Returns the array of property names.
  4456. */
  4457. function baseKeysIn(object) {
  4458. if (!isObject(object)) {
  4459. return nativeKeysIn(object);
  4460. }
  4461. var isProto = isPrototype(object),
  4462. result = [];
  4463. for (var key in object) {
  4464. if (!(key == 'constructor' && (isProto || !hasOwnProperty.call(object, key)))) {
  4465. result.push(key);
  4466. }
  4467. }
  4468. return result;
  4469. }
  4470. /**
  4471. * The base implementation of `_.lt` which doesn't coerce arguments.
  4472. *
  4473. * @private
  4474. * @param {*} value The value to compare.
  4475. * @param {*} other The other value to compare.
  4476. * @returns {boolean} Returns `true` if `value` is less than `other`,
  4477. * else `false`.
  4478. */
  4479. function baseLt(value, other) {
  4480. return value < other;
  4481. }
  4482. /**
  4483. * The base implementation of `_.map` without support for iteratee shorthands.
  4484. *
  4485. * @private
  4486. * @param {Array|Object} collection The collection to iterate over.
  4487. * @param {Function} iteratee The function invoked per iteration.
  4488. * @returns {Array} Returns the new mapped array.
  4489. */
  4490. function baseMap(collection, iteratee) {
  4491. var index = -1,
  4492. result = isArrayLike(collection) ? Array(collection.length) : [];
  4493. baseEach(collection, function(value, key, collection) {
  4494. result[++index] = iteratee(value, key, collection);
  4495. });
  4496. return result;
  4497. }
  4498. /**
  4499. * The base implementation of `_.matches` which doesn't clone `source`.
  4500. *
  4501. * @private
  4502. * @param {Object} source The object of property values to match.
  4503. * @returns {Function} Returns the new spec function.
  4504. */
  4505. function baseMatches(source) {
  4506. var matchData = getMatchData(source);
  4507. if (matchData.length == 1 && matchData[0][2]) {
  4508. return matchesStrictComparable(matchData[0][0], matchData[0][1]);
  4509. }
  4510. return function(object) {
  4511. return object === source || baseIsMatch(object, source, matchData);
  4512. };
  4513. }
  4514. /**
  4515. * The base implementation of `_.matchesProperty` which doesn't clone `srcValue`.
  4516. *
  4517. * @private
  4518. * @param {string} path The path of the property to get.
  4519. * @param {*} srcValue The value to match.
  4520. * @returns {Function} Returns the new spec function.
  4521. */
  4522. function baseMatchesProperty(path, srcValue) {
  4523. if (isKey(path) && isStrictComparable(srcValue)) {
  4524. return matchesStrictComparable(toKey(path), srcValue);
  4525. }
  4526. return function(object) {
  4527. var objValue = get(object, path);
  4528. return (objValue === undefined && objValue === srcValue)
  4529. ? hasIn(object, path)
  4530. : baseIsEqual(srcValue, objValue, COMPARE_PARTIAL_FLAG | COMPARE_UNORDERED_FLAG);
  4531. };
  4532. }
  4533. /**
  4534. * The base implementation of `_.merge` without support for multiple sources.
  4535. *
  4536. * @private
  4537. * @param {Object} object The destination object.
  4538. * @param {Object} source The source object.
  4539. * @param {number} srcIndex The index of `source`.
  4540. * @param {Function} [customizer] The function to customize merged values.
  4541. * @param {Object} [stack] Tracks traversed source values and their merged
  4542. * counterparts.
  4543. */
  4544. function baseMerge(object, source, srcIndex, customizer, stack) {
  4545. if (object === source) {
  4546. return;
  4547. }
  4548. baseFor(source, function(srcValue, key) {
  4549. if (isObject(srcValue)) {
  4550. stack || (stack = new Stack);
  4551. baseMergeDeep(object, source, key, srcIndex, baseMerge, customizer, stack);
  4552. }
  4553. else {
  4554. var newValue = customizer
  4555. ? customizer(safeGet(object, key), srcValue, (key + ''), object, source, stack)
  4556. : undefined;
  4557. if (newValue === undefined) {
  4558. newValue = srcValue;
  4559. }
  4560. assignMergeValue(object, key, newValue);
  4561. }
  4562. }, keysIn);
  4563. }
  4564. /**
  4565. * A specialized version of `baseMerge` for arrays and objects which performs
  4566. * deep merges and tracks traversed objects enabling objects with circular
  4567. * references to be merged.
  4568. *
  4569. * @private
  4570. * @param {Object} object The destination object.
  4571. * @param {Object} source The source object.
  4572. * @param {string} key The key of the value to merge.
  4573. * @param {number} srcIndex The index of `source`.
  4574. * @param {Function} mergeFunc The function to merge values.
  4575. * @param {Function} [customizer] The function to customize assigned values.
  4576. * @param {Object} [stack] Tracks traversed source values and their merged
  4577. * counterparts.
  4578. */
  4579. function baseMergeDeep(object, source, key, srcIndex, mergeFunc, customizer, stack) {
  4580. var objValue = safeGet(object, key),
  4581. srcValue = safeGet(source, key),
  4582. stacked = stack.get(srcValue);
  4583. if (stacked) {
  4584. assignMergeValue(object, key, stacked);
  4585. return;
  4586. }
  4587. var newValue = customizer
  4588. ? customizer(objValue, srcValue, (key + ''), object, source, stack)
  4589. : undefined;
  4590. var isCommon = newValue === undefined;
  4591. if (isCommon) {
  4592. var isArr = isArray(srcValue),
  4593. isBuff = !isArr && isBuffer(srcValue),
  4594. isTyped = !isArr && !isBuff && isTypedArray(srcValue);
  4595. newValue = srcValue;
  4596. if (isArr || isBuff || isTyped) {
  4597. if (isArray(objValue)) {
  4598. newValue = objValue;
  4599. }
  4600. else if (isArrayLikeObject(objValue)) {
  4601. newValue = copyArray(objValue);
  4602. }
  4603. else if (isBuff) {
  4604. isCommon = false;
  4605. newValue = cloneBuffer(srcValue, true);
  4606. }
  4607. else if (isTyped) {
  4608. isCommon = false;
  4609. newValue = cloneTypedArray(srcValue, true);
  4610. }
  4611. else {
  4612. newValue = [];
  4613. }
  4614. }
  4615. else if (isPlainObject(srcValue) || isArguments(srcValue)) {
  4616. newValue = objValue;
  4617. if (isArguments(objValue)) {
  4618. newValue = toPlainObject(objValue);
  4619. }
  4620. else if (!isObject(objValue) || (srcIndex && isFunction(objValue))) {
  4621. newValue = initCloneObject(srcValue);
  4622. }
  4623. }
  4624. else {
  4625. isCommon = false;
  4626. }
  4627. }
  4628. if (isCommon) {
  4629. // Recursively merge objects and arrays (susceptible to call stack limits).
  4630. stack.set(srcValue, newValue);
  4631. mergeFunc(newValue, srcValue, srcIndex, customizer, stack);
  4632. stack['delete'](srcValue);
  4633. }
  4634. assignMergeValue(object, key, newValue);
  4635. }
  4636. /**
  4637. * The base implementation of `_.nth` which doesn't coerce arguments.
  4638. *
  4639. * @private
  4640. * @param {Array} array The array to query.
  4641. * @param {number} n The index of the element to return.
  4642. * @returns {*} Returns the nth element of `array`.
  4643. */
  4644. function baseNth(array, n) {
  4645. var length = array.length;
  4646. if (!length) {
  4647. return;
  4648. }
  4649. n += n < 0 ? length : 0;
  4650. return isIndex(n, length) ? array[n] : undefined;
  4651. }
  4652. /**
  4653. * The base implementation of `_.orderBy` without param guards.
  4654. *
  4655. * @private
  4656. * @param {Array|Object} collection The collection to iterate over.
  4657. * @param {Function[]|Object[]|string[]} iteratees The iteratees to sort by.
  4658. * @param {string[]} orders The sort orders of `iteratees`.
  4659. * @returns {Array} Returns the new sorted array.
  4660. */
  4661. function baseOrderBy(collection, iteratees, orders) {
  4662. var index = -1;
  4663. iteratees = arrayMap(iteratees.length ? iteratees : [identity], baseUnary(getIteratee()));
  4664. var result = baseMap(collection, function(value, key, collection) {
  4665. var criteria = arrayMap(iteratees, function(iteratee) {
  4666. return iteratee(value);
  4667. });
  4668. return { 'criteria': criteria, 'index': ++index, 'value': value };
  4669. });
  4670. return baseSortBy(result, function(object, other) {
  4671. return compareMultiple(object, other, orders);
  4672. });
  4673. }
  4674. /**
  4675. * The base implementation of `_.pick` without support for individual
  4676. * property identifiers.
  4677. *
  4678. * @private
  4679. * @param {Object} object The source object.
  4680. * @param {string[]} paths The property paths to pick.
  4681. * @returns {Object} Returns the new object.
  4682. */
  4683. function basePick(object, paths) {
  4684. return basePickBy(object, paths, function(value, path) {
  4685. return hasIn(object, path);
  4686. });
  4687. }
  4688. /**
  4689. * The base implementation of `_.pickBy` without support for iteratee shorthands.
  4690. *
  4691. * @private
  4692. * @param {Object} object The source object.
  4693. * @param {string[]} paths The property paths to pick.
  4694. * @param {Function} predicate The function invoked per property.
  4695. * @returns {Object} Returns the new object.
  4696. */
  4697. function basePickBy(object, paths, predicate) {
  4698. var index = -1,
  4699. length = paths.length,
  4700. result = {};
  4701. while (++index < length) {
  4702. var path = paths[index],
  4703. value = baseGet(object, path);
  4704. if (predicate(value, path)) {
  4705. baseSet(result, castPath(path, object), value);
  4706. }
  4707. }
  4708. return result;
  4709. }
  4710. /**
  4711. * A specialized version of `baseProperty` which supports deep paths.
  4712. *
  4713. * @private
  4714. * @param {Array|string} path The path of the property to get.
  4715. * @returns {Function} Returns the new accessor function.
  4716. */
  4717. function basePropertyDeep(path) {
  4718. return function(object) {
  4719. return baseGet(object, path);
  4720. };
  4721. }
  4722. /**
  4723. * The base implementation of `_.pullAllBy` without support for iteratee
  4724. * shorthands.
  4725. *
  4726. * @private
  4727. * @param {Array} array The array to modify.
  4728. * @param {Array} values The values to remove.
  4729. * @param {Function} [iteratee] The iteratee invoked per element.
  4730. * @param {Function} [comparator] The comparator invoked per element.
  4731. * @returns {Array} Returns `array`.
  4732. */
  4733. function basePullAll(array, values, iteratee, comparator) {
  4734. var indexOf = comparator ? baseIndexOfWith : baseIndexOf,
  4735. index = -1,
  4736. length = values.length,
  4737. seen = array;
  4738. if (array === values) {
  4739. values = copyArray(values);
  4740. }
  4741. if (iteratee) {
  4742. seen = arrayMap(array, baseUnary(iteratee));
  4743. }
  4744. while (++index < length) {
  4745. var fromIndex = 0,
  4746. value = values[index],
  4747. computed = iteratee ? iteratee(value) : value;
  4748. while ((fromIndex = indexOf(seen, computed, fromIndex, comparator)) > -1) {
  4749. if (seen !== array) {
  4750. splice.call(seen, fromIndex, 1);
  4751. }
  4752. splice.call(array, fromIndex, 1);
  4753. }
  4754. }
  4755. return array;
  4756. }
  4757. /**
  4758. * The base implementation of `_.pullAt` without support for individual
  4759. * indexes or capturing the removed elements.
  4760. *
  4761. * @private
  4762. * @param {Array} array The array to modify.
  4763. * @param {number[]} indexes The indexes of elements to remove.
  4764. * @returns {Array} Returns `array`.
  4765. */
  4766. function basePullAt(array, indexes) {
  4767. var length = array ? indexes.length : 0,
  4768. lastIndex = length - 1;
  4769. while (length--) {
  4770. var index = indexes[length];
  4771. if (length == lastIndex || index !== previous) {
  4772. var previous = index;
  4773. if (isIndex(index)) {
  4774. splice.call(array, index, 1);
  4775. } else {
  4776. baseUnset(array, index);
  4777. }
  4778. }
  4779. }
  4780. return array;
  4781. }
  4782. /**
  4783. * The base implementation of `_.random` without support for returning
  4784. * floating-point numbers.
  4785. *
  4786. * @private
  4787. * @param {number} lower The lower bound.
  4788. * @param {number} upper The upper bound.
  4789. * @returns {number} Returns the random number.
  4790. */
  4791. function baseRandom(lower, upper) {
  4792. return lower + nativeFloor(nativeRandom() * (upper - lower + 1));
  4793. }
  4794. /**
  4795. * The base implementation of `_.range` and `_.rangeRight` which doesn't
  4796. * coerce arguments.
  4797. *
  4798. * @private
  4799. * @param {number} start The start of the range.
  4800. * @param {number} end The end of the range.
  4801. * @param {number} step The value to increment or decrement by.
  4802. * @param {boolean} [fromRight] Specify iterating from right to left.
  4803. * @returns {Array} Returns the range of numbers.
  4804. */
  4805. function baseRange(start, end, step, fromRight) {
  4806. var index = -1,
  4807. length = nativeMax(nativeCeil((end - start) / (step || 1)), 0),
  4808. result = Array(length);
  4809. while (length--) {
  4810. result[fromRight ? length : ++index] = start;
  4811. start += step;
  4812. }
  4813. return result;
  4814. }
  4815. /**
  4816. * The base implementation of `_.repeat` which doesn't coerce arguments.
  4817. *
  4818. * @private
  4819. * @param {string} string The string to repeat.
  4820. * @param {number} n The number of times to repeat the string.
  4821. * @returns {string} Returns the repeated string.
  4822. */
  4823. function baseRepeat(string, n) {
  4824. var result = '';
  4825. if (!string || n < 1 || n > MAX_SAFE_INTEGER) {
  4826. return result;
  4827. }
  4828. // Leverage the exponentiation by squaring algorithm for a faster repeat.
  4829. // See https://en.wikipedia.org/wiki/Exponentiation_by_squaring for more details.
  4830. do {
  4831. if (n % 2) {
  4832. result += string;
  4833. }
  4834. n = nativeFloor(n / 2);
  4835. if (n) {
  4836. string += string;
  4837. }
  4838. } while (n);
  4839. return result;
  4840. }
  4841. /**
  4842. * The base implementation of `_.rest` which doesn't validate or coerce arguments.
  4843. *
  4844. * @private
  4845. * @param {Function} func The function to apply a rest parameter to.
  4846. * @param {number} [start=func.length-1] The start position of the rest parameter.
  4847. * @returns {Function} Returns the new function.
  4848. */
  4849. function baseRest(func, start) {
  4850. return setToString(overRest(func, start, identity), func + '');
  4851. }
  4852. /**
  4853. * The base implementation of `_.sample`.
  4854. *
  4855. * @private
  4856. * @param {Array|Object} collection The collection to sample.
  4857. * @returns {*} Returns the random element.
  4858. */
  4859. function baseSample(collection) {
  4860. return arraySample(values(collection));
  4861. }
  4862. /**
  4863. * The base implementation of `_.sampleSize` without param guards.
  4864. *
  4865. * @private
  4866. * @param {Array|Object} collection The collection to sample.
  4867. * @param {number} n The number of elements to sample.
  4868. * @returns {Array} Returns the random elements.
  4869. */
  4870. function baseSampleSize(collection, n) {
  4871. var array = values(collection);
  4872. return shuffleSelf(array, baseClamp(n, 0, array.length));
  4873. }
  4874. /**
  4875. * The base implementation of `_.set`.
  4876. *
  4877. * @private
  4878. * @param {Object} object The object to modify.
  4879. * @param {Array|string} path The path of the property to set.
  4880. * @param {*} value The value to set.
  4881. * @param {Function} [customizer] The function to customize path creation.
  4882. * @returns {Object} Returns `object`.
  4883. */
  4884. function baseSet(object, path, value, customizer) {
  4885. if (!isObject(object)) {
  4886. return object;
  4887. }
  4888. path = castPath(path, object);
  4889. var index = -1,
  4890. length = path.length,
  4891. lastIndex = length - 1,
  4892. nested = object;
  4893. while (nested != null && ++index < length) {
  4894. var key = toKey(path[index]),
  4895. newValue = value;
  4896. if (index != lastIndex) {
  4897. var objValue = nested[key];
  4898. newValue = customizer ? customizer(objValue, key, nested) : undefined;
  4899. if (newValue === undefined) {
  4900. newValue = isObject(objValue)
  4901. ? objValue
  4902. : (isIndex(path[index + 1]) ? [] : {});
  4903. }
  4904. }
  4905. assignValue(nested, key, newValue);
  4906. nested = nested[key];
  4907. }
  4908. return object;
  4909. }
  4910. /**
  4911. * The base implementation of `setData` without support for hot loop shorting.
  4912. *
  4913. * @private
  4914. * @param {Function} func The function to associate metadata with.
  4915. * @param {*} data The metadata.
  4916. * @returns {Function} Returns `func`.
  4917. */
  4918. var baseSetData = !metaMap ? identity : function(func, data) {
  4919. metaMap.set(func, data);
  4920. return func;
  4921. };
  4922. /**
  4923. * The base implementation of `setToString` without support for hot loop shorting.
  4924. *
  4925. * @private
  4926. * @param {Function} func The function to modify.
  4927. * @param {Function} string The `toString` result.
  4928. * @returns {Function} Returns `func`.
  4929. */
  4930. var baseSetToString = !defineProperty ? identity : function(func, string) {
  4931. return defineProperty(func, 'toString', {
  4932. 'configurable': true,
  4933. 'enumerable': false,
  4934. 'value': constant(string),
  4935. 'writable': true
  4936. });
  4937. };
  4938. /**
  4939. * The base implementation of `_.shuffle`.
  4940. *
  4941. * @private
  4942. * @param {Array|Object} collection The collection to shuffle.
  4943. * @returns {Array} Returns the new shuffled array.
  4944. */
  4945. function baseShuffle(collection) {
  4946. return shuffleSelf(values(collection));
  4947. }
  4948. /**
  4949. * The base implementation of `_.slice` without an iteratee call guard.
  4950. *
  4951. * @private
  4952. * @param {Array} array The array to slice.
  4953. * @param {number} [start=0] The start position.
  4954. * @param {number} [end=array.length] The end position.
  4955. * @returns {Array} Returns the slice of `array`.
  4956. */
  4957. function baseSlice(array, start, end) {
  4958. var index = -1,
  4959. length = array.length;
  4960. if (start < 0) {
  4961. start = -start > length ? 0 : (length + start);
  4962. }
  4963. end = end > length ? length : end;
  4964. if (end < 0) {
  4965. end += length;
  4966. }
  4967. length = start > end ? 0 : ((end - start) >>> 0);
  4968. start >>>= 0;
  4969. var result = Array(length);
  4970. while (++index < length) {
  4971. result[index] = array[index + start];
  4972. }
  4973. return result;
  4974. }
  4975. /**
  4976. * The base implementation of `_.some` without support for iteratee shorthands.
  4977. *
  4978. * @private
  4979. * @param {Array|Object} collection The collection to iterate over.
  4980. * @param {Function} predicate The function invoked per iteration.
  4981. * @returns {boolean} Returns `true` if any element passes the predicate check,
  4982. * else `false`.
  4983. */
  4984. function baseSome(collection, predicate) {
  4985. var result;
  4986. baseEach(collection, function(value, index, collection) {
  4987. result = predicate(value, index, collection);
  4988. return !result;
  4989. });
  4990. return !!result;
  4991. }
  4992. /**
  4993. * The base implementation of `_.sortedIndex` and `_.sortedLastIndex` which
  4994. * performs a binary search of `array` to determine the index at which `value`
  4995. * should be inserted into `array` in order to maintain its sort order.
  4996. *
  4997. * @private
  4998. * @param {Array} array The sorted array to inspect.
  4999. * @param {*} value The value to evaluate.
  5000. * @param {boolean} [retHighest] Specify returning the highest qualified index.
  5001. * @returns {number} Returns the index at which `value` should be inserted
  5002. * into `array`.
  5003. */
  5004. function baseSortedIndex(array, value, retHighest) {
  5005. var low = 0,
  5006. high = array == null ? low : array.length;
  5007. if (typeof value == 'number' && value === value && high <= HALF_MAX_ARRAY_LENGTH) {
  5008. while (low < high) {
  5009. var mid = (low + high) >>> 1,
  5010. computed = array[mid];
  5011. if (computed !== null && !isSymbol(computed) &&
  5012. (retHighest ? (computed <= value) : (computed < value))) {
  5013. low = mid + 1;
  5014. } else {
  5015. high = mid;
  5016. }
  5017. }
  5018. return high;
  5019. }
  5020. return baseSortedIndexBy(array, value, identity, retHighest);
  5021. }
  5022. /**
  5023. * The base implementation of `_.sortedIndexBy` and `_.sortedLastIndexBy`
  5024. * which invokes `iteratee` for `value` and each element of `array` to compute
  5025. * their sort ranking. The iteratee is invoked with one argument; (value).
  5026. *
  5027. * @private
  5028. * @param {Array} array The sorted array to inspect.
  5029. * @param {*} value The value to evaluate.
  5030. * @param {Function} iteratee The iteratee invoked per element.
  5031. * @param {boolean} [retHighest] Specify returning the highest qualified index.
  5032. * @returns {number} Returns the index at which `value` should be inserted
  5033. * into `array`.
  5034. */
  5035. function baseSortedIndexBy(array, value, iteratee, retHighest) {
  5036. value = iteratee(value);
  5037. var low = 0,
  5038. high = array == null ? 0 : array.length,
  5039. valIsNaN = value !== value,
  5040. valIsNull = value === null,
  5041. valIsSymbol = isSymbol(value),
  5042. valIsUndefined = value === undefined;
  5043. while (low < high) {
  5044. var mid = nativeFloor((low + high) / 2),
  5045. computed = iteratee(array[mid]),
  5046. othIsDefined = computed !== undefined,
  5047. othIsNull = computed === null,
  5048. othIsReflexive = computed === computed,
  5049. othIsSymbol = isSymbol(computed);
  5050. if (valIsNaN) {
  5051. var setLow = retHighest || othIsReflexive;
  5052. } else if (valIsUndefined) {
  5053. setLow = othIsReflexive && (retHighest || othIsDefined);
  5054. } else if (valIsNull) {
  5055. setLow = othIsReflexive && othIsDefined && (retHighest || !othIsNull);
  5056. } else if (valIsSymbol) {
  5057. setLow = othIsReflexive && othIsDefined && !othIsNull && (retHighest || !othIsSymbol);
  5058. } else if (othIsNull || othIsSymbol) {
  5059. setLow = false;
  5060. } else {
  5061. setLow = retHighest ? (computed <= value) : (computed < value);
  5062. }
  5063. if (setLow) {
  5064. low = mid + 1;
  5065. } else {
  5066. high = mid;
  5067. }
  5068. }
  5069. return nativeMin(high, MAX_ARRAY_INDEX);
  5070. }
  5071. /**
  5072. * The base implementation of `_.sortedUniq` and `_.sortedUniqBy` without
  5073. * support for iteratee shorthands.
  5074. *
  5075. * @private
  5076. * @param {Array} array The array to inspect.
  5077. * @param {Function} [iteratee] The iteratee invoked per element.
  5078. * @returns {Array} Returns the new duplicate free array.
  5079. */
  5080. function baseSortedUniq(array, iteratee) {
  5081. var index = -1,
  5082. length = array.length,
  5083. resIndex = 0,
  5084. result = [];
  5085. while (++index < length) {
  5086. var value = array[index],
  5087. computed = iteratee ? iteratee(value) : value;
  5088. if (!index || !eq(computed, seen)) {
  5089. var seen = computed;
  5090. result[resIndex++] = value === 0 ? 0 : value;
  5091. }
  5092. }
  5093. return result;
  5094. }
  5095. /**
  5096. * The base implementation of `_.toNumber` which doesn't ensure correct
  5097. * conversions of binary, hexadecimal, or octal string values.
  5098. *
  5099. * @private
  5100. * @param {*} value The value to process.
  5101. * @returns {number} Returns the number.
  5102. */
  5103. function baseToNumber(value) {
  5104. if (typeof value == 'number') {
  5105. return value;
  5106. }
  5107. if (isSymbol(value)) {
  5108. return NAN;
  5109. }
  5110. return +value;
  5111. }
  5112. /**
  5113. * The base implementation of `_.toString` which doesn't convert nullish
  5114. * values to empty strings.
  5115. *
  5116. * @private
  5117. * @param {*} value The value to process.
  5118. * @returns {string} Returns the string.
  5119. */
  5120. function baseToString(value) {
  5121. // Exit early for strings to avoid a performance hit in some environments.
  5122. if (typeof value == 'string') {
  5123. return value;
  5124. }
  5125. if (isArray(value)) {
  5126. // Recursively convert values (susceptible to call stack limits).
  5127. return arrayMap(value, baseToString) + '';
  5128. }
  5129. if (isSymbol(value)) {
  5130. return symbolToString ? symbolToString.call(value) : '';
  5131. }
  5132. var result = (value + '');
  5133. return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
  5134. }
  5135. /**
  5136. * The base implementation of `_.uniqBy` without support for iteratee shorthands.
  5137. *
  5138. * @private
  5139. * @param {Array} array The array to inspect.
  5140. * @param {Function} [iteratee] The iteratee invoked per element.
  5141. * @param {Function} [comparator] The comparator invoked per element.
  5142. * @returns {Array} Returns the new duplicate free array.
  5143. */
  5144. function baseUniq(array, iteratee, comparator) {
  5145. var index = -1,
  5146. includes = arrayIncludes,
  5147. length = array.length,
  5148. isCommon = true,
  5149. result = [],
  5150. seen = result;
  5151. if (comparator) {
  5152. isCommon = false;
  5153. includes = arrayIncludesWith;
  5154. }
  5155. else if (length >= LARGE_ARRAY_SIZE) {
  5156. var set = iteratee ? null : createSet(array);
  5157. if (set) {
  5158. return setToArray(set);
  5159. }
  5160. isCommon = false;
  5161. includes = cacheHas;
  5162. seen = new SetCache;
  5163. }
  5164. else {
  5165. seen = iteratee ? [] : result;
  5166. }
  5167. outer:
  5168. while (++index < length) {
  5169. var value = array[index],
  5170. computed = iteratee ? iteratee(value) : value;
  5171. value = (comparator || value !== 0) ? value : 0;
  5172. if (isCommon && computed === computed) {
  5173. var seenIndex = seen.length;
  5174. while (seenIndex--) {
  5175. if (seen[seenIndex] === computed) {
  5176. continue outer;
  5177. }
  5178. }
  5179. if (iteratee) {
  5180. seen.push(computed);
  5181. }
  5182. result.push(value);
  5183. }
  5184. else if (!includes(seen, computed, comparator)) {
  5185. if (seen !== result) {
  5186. seen.push(computed);
  5187. }
  5188. result.push(value);
  5189. }
  5190. }
  5191. return result;
  5192. }
  5193. /**
  5194. * The base implementation of `_.unset`.
  5195. *
  5196. * @private
  5197. * @param {Object} object The object to modify.
  5198. * @param {Array|string} path The property path to unset.
  5199. * @returns {boolean} Returns `true` if the property is deleted, else `false`.
  5200. */
  5201. function baseUnset(object, path) {
  5202. path = castPath(path, object);
  5203. object = parent(object, path);
  5204. return object == null || delete object[toKey(last(path))];
  5205. }
  5206. /**
  5207. * The base implementation of `_.update`.
  5208. *
  5209. * @private
  5210. * @param {Object} object The object to modify.
  5211. * @param {Array|string} path The path of the property to update.
  5212. * @param {Function} updater The function to produce the updated value.
  5213. * @param {Function} [customizer] The function to customize path creation.
  5214. * @returns {Object} Returns `object`.
  5215. */
  5216. function baseUpdate(object, path, updater, customizer) {
  5217. return baseSet(object, path, updater(baseGet(object, path)), customizer);
  5218. }
  5219. /**
  5220. * The base implementation of methods like `_.dropWhile` and `_.takeWhile`
  5221. * without support for iteratee shorthands.
  5222. *
  5223. * @private
  5224. * @param {Array} array The array to query.
  5225. * @param {Function} predicate The function invoked per iteration.
  5226. * @param {boolean} [isDrop] Specify dropping elements instead of taking them.
  5227. * @param {boolean} [fromRight] Specify iterating from right to left.
  5228. * @returns {Array} Returns the slice of `array`.
  5229. */
  5230. function baseWhile(array, predicate, isDrop, fromRight) {
  5231. var length = array.length,
  5232. index = fromRight ? length : -1;
  5233. while ((fromRight ? index-- : ++index < length) &&
  5234. predicate(array[index], index, array)) {}
  5235. return isDrop
  5236. ? baseSlice(array, (fromRight ? 0 : index), (fromRight ? index + 1 : length))
  5237. : baseSlice(array, (fromRight ? index + 1 : 0), (fromRight ? length : index));
  5238. }
  5239. /**
  5240. * The base implementation of `wrapperValue` which returns the result of
  5241. * performing a sequence of actions on the unwrapped `value`, where each
  5242. * successive action is supplied the return value of the previous.
  5243. *
  5244. * @private
  5245. * @param {*} value The unwrapped value.
  5246. * @param {Array} actions Actions to perform to resolve the unwrapped value.
  5247. * @returns {*} Returns the resolved value.
  5248. */
  5249. function baseWrapperValue(value, actions) {
  5250. var result = value;
  5251. if (result instanceof LazyWrapper) {
  5252. result = result.value();
  5253. }
  5254. return arrayReduce(actions, function(result, action) {
  5255. return action.func.apply(action.thisArg, arrayPush([result], action.args));
  5256. }, result);
  5257. }
  5258. /**
  5259. * The base implementation of methods like `_.xor`, without support for
  5260. * iteratee shorthands, that accepts an array of arrays to inspect.
  5261. *
  5262. * @private
  5263. * @param {Array} arrays The arrays to inspect.
  5264. * @param {Function} [iteratee] The iteratee invoked per element.
  5265. * @param {Function} [comparator] The comparator invoked per element.
  5266. * @returns {Array} Returns the new array of values.
  5267. */
  5268. function baseXor(arrays, iteratee, comparator) {
  5269. var length = arrays.length;
  5270. if (length < 2) {
  5271. return length ? baseUniq(arrays[0]) : [];
  5272. }
  5273. var index = -1,
  5274. result = Array(length);
  5275. while (++index < length) {
  5276. var array = arrays[index],
  5277. othIndex = -1;
  5278. while (++othIndex < length) {
  5279. if (othIndex != index) {
  5280. result[index] = baseDifference(result[index] || array, arrays[othIndex], iteratee, comparator);
  5281. }
  5282. }
  5283. }
  5284. return baseUniq(baseFlatten(result, 1), iteratee, comparator);
  5285. }
  5286. /**
  5287. * This base implementation of `_.zipObject` which assigns values using `assignFunc`.
  5288. *
  5289. * @private
  5290. * @param {Array} props The property identifiers.
  5291. * @param {Array} values The property values.
  5292. * @param {Function} assignFunc The function to assign values.
  5293. * @returns {Object} Returns the new object.
  5294. */
  5295. function baseZipObject(props, values, assignFunc) {
  5296. var index = -1,
  5297. length = props.length,
  5298. valsLength = values.length,
  5299. result = {};
  5300. while (++index < length) {
  5301. var value = index < valsLength ? values[index] : undefined;
  5302. assignFunc(result, props[index], value);
  5303. }
  5304. return result;
  5305. }
  5306. /**
  5307. * Casts `value` to an empty array if it's not an array like object.
  5308. *
  5309. * @private
  5310. * @param {*} value The value to inspect.
  5311. * @returns {Array|Object} Returns the cast array-like object.
  5312. */
  5313. function castArrayLikeObject(value) {
  5314. return isArrayLikeObject(value) ? value : [];
  5315. }
  5316. /**
  5317. * Casts `value` to `identity` if it's not a function.
  5318. *
  5319. * @private
  5320. * @param {*} value The value to inspect.
  5321. * @returns {Function} Returns cast function.
  5322. */
  5323. function castFunction(value) {
  5324. return typeof value == 'function' ? value : identity;
  5325. }
  5326. /**
  5327. * Casts `value` to a path array if it's not one.
  5328. *
  5329. * @private
  5330. * @param {*} value The value to inspect.
  5331. * @param {Object} [object] The object to query keys on.
  5332. * @returns {Array} Returns the cast property path array.
  5333. */
  5334. function castPath(value, object) {
  5335. if (isArray(value)) {
  5336. return value;
  5337. }
  5338. return isKey(value, object) ? [value] : stringToPath(toString(value));
  5339. }
  5340. /**
  5341. * A `baseRest` alias which can be replaced with `identity` by module
  5342. * replacement plugins.
  5343. *
  5344. * @private
  5345. * @type {Function}
  5346. * @param {Function} func The function to apply a rest parameter to.
  5347. * @returns {Function} Returns the new function.
  5348. */
  5349. var castRest = baseRest;
  5350. /**
  5351. * Casts `array` to a slice if it's needed.
  5352. *
  5353. * @private
  5354. * @param {Array} array The array to inspect.
  5355. * @param {number} start The start position.
  5356. * @param {number} [end=array.length] The end position.
  5357. * @returns {Array} Returns the cast slice.
  5358. */
  5359. function castSlice(array, start, end) {
  5360. var length = array.length;
  5361. end = end === undefined ? length : end;
  5362. return (!start && end >= length) ? array : baseSlice(array, start, end);
  5363. }
  5364. /**
  5365. * A simple wrapper around the global [`clearTimeout`](https://mdn.io/clearTimeout).
  5366. *
  5367. * @private
  5368. * @param {number|Object} id The timer id or timeout object of the timer to clear.
  5369. */
  5370. var clearTimeout = ctxClearTimeout || function(id) {
  5371. return root.clearTimeout(id);
  5372. };
  5373. /**
  5374. * Creates a clone of `buffer`.
  5375. *
  5376. * @private
  5377. * @param {Buffer} buffer The buffer to clone.
  5378. * @param {boolean} [isDeep] Specify a deep clone.
  5379. * @returns {Buffer} Returns the cloned buffer.
  5380. */
  5381. function cloneBuffer(buffer, isDeep) {
  5382. if (isDeep) {
  5383. return buffer.slice();
  5384. }
  5385. var length = buffer.length,
  5386. result = allocUnsafe ? allocUnsafe(length) : new buffer.constructor(length);
  5387. buffer.copy(result);
  5388. return result;
  5389. }
  5390. /**
  5391. * Creates a clone of `arrayBuffer`.
  5392. *
  5393. * @private
  5394. * @param {ArrayBuffer} arrayBuffer The array buffer to clone.
  5395. * @returns {ArrayBuffer} Returns the cloned array buffer.
  5396. */
  5397. function cloneArrayBuffer(arrayBuffer) {
  5398. var result = new arrayBuffer.constructor(arrayBuffer.byteLength);
  5399. new Uint8Array(result).set(new Uint8Array(arrayBuffer));
  5400. return result;
  5401. }
  5402. /**
  5403. * Creates a clone of `dataView`.
  5404. *
  5405. * @private
  5406. * @param {Object} dataView The data view to clone.
  5407. * @param {boolean} [isDeep] Specify a deep clone.
  5408. * @returns {Object} Returns the cloned data view.
  5409. */
  5410. function cloneDataView(dataView, isDeep) {
  5411. var buffer = isDeep ? cloneArrayBuffer(dataView.buffer) : dataView.buffer;
  5412. return new dataView.constructor(buffer, dataView.byteOffset, dataView.byteLength);
  5413. }
  5414. /**
  5415. * Creates a clone of `regexp`.
  5416. *
  5417. * @private
  5418. * @param {Object} regexp The regexp to clone.
  5419. * @returns {Object} Returns the cloned regexp.
  5420. */
  5421. function cloneRegExp(regexp) {
  5422. var result = new regexp.constructor(regexp.source, reFlags.exec(regexp));
  5423. result.lastIndex = regexp.lastIndex;
  5424. return result;
  5425. }
  5426. /**
  5427. * Creates a clone of the `symbol` object.
  5428. *
  5429. * @private
  5430. * @param {Object} symbol The symbol object to clone.
  5431. * @returns {Object} Returns the cloned symbol object.
  5432. */
  5433. function cloneSymbol(symbol) {
  5434. return symbolValueOf ? Object(symbolValueOf.call(symbol)) : {};
  5435. }
  5436. /**
  5437. * Creates a clone of `typedArray`.
  5438. *
  5439. * @private
  5440. * @param {Object} typedArray The typed array to clone.
  5441. * @param {boolean} [isDeep] Specify a deep clone.
  5442. * @returns {Object} Returns the cloned typed array.
  5443. */
  5444. function cloneTypedArray(typedArray, isDeep) {
  5445. var buffer = isDeep ? cloneArrayBuffer(typedArray.buffer) : typedArray.buffer;
  5446. return new typedArray.constructor(buffer, typedArray.byteOffset, typedArray.length);
  5447. }
  5448. /**
  5449. * Compares values to sort them in ascending order.
  5450. *
  5451. * @private
  5452. * @param {*} value The value to compare.
  5453. * @param {*} other The other value to compare.
  5454. * @returns {number} Returns the sort order indicator for `value`.
  5455. */
  5456. function compareAscending(value, other) {
  5457. if (value !== other) {
  5458. var valIsDefined = value !== undefined,
  5459. valIsNull = value === null,
  5460. valIsReflexive = value === value,
  5461. valIsSymbol = isSymbol(value);
  5462. var othIsDefined = other !== undefined,
  5463. othIsNull = other === null,
  5464. othIsReflexive = other === other,
  5465. othIsSymbol = isSymbol(other);
  5466. if ((!othIsNull && !othIsSymbol && !valIsSymbol && value > other) ||
  5467. (valIsSymbol && othIsDefined && othIsReflexive && !othIsNull && !othIsSymbol) ||
  5468. (valIsNull && othIsDefined && othIsReflexive) ||
  5469. (!valIsDefined && othIsReflexive) ||
  5470. !valIsReflexive) {
  5471. return 1;
  5472. }
  5473. if ((!valIsNull && !valIsSymbol && !othIsSymbol && value < other) ||
  5474. (othIsSymbol && valIsDefined && valIsReflexive && !valIsNull && !valIsSymbol) ||
  5475. (othIsNull && valIsDefined && valIsReflexive) ||
  5476. (!othIsDefined && valIsReflexive) ||
  5477. !othIsReflexive) {
  5478. return -1;
  5479. }
  5480. }
  5481. return 0;
  5482. }
  5483. /**
  5484. * Used by `_.orderBy` to compare multiple properties of a value to another
  5485. * and stable sort them.
  5486. *
  5487. * If `orders` is unspecified, all values are sorted in ascending order. Otherwise,
  5488. * specify an order of "desc" for descending or "asc" for ascending sort order
  5489. * of corresponding values.
  5490. *
  5491. * @private
  5492. * @param {Object} object The object to compare.
  5493. * @param {Object} other The other object to compare.
  5494. * @param {boolean[]|string[]} orders The order to sort by for each property.
  5495. * @returns {number} Returns the sort order indicator for `object`.
  5496. */
  5497. function compareMultiple(object, other, orders) {
  5498. var index = -1,
  5499. objCriteria = object.criteria,
  5500. othCriteria = other.criteria,
  5501. length = objCriteria.length,
  5502. ordersLength = orders.length;
  5503. while (++index < length) {
  5504. var result = compareAscending(objCriteria[index], othCriteria[index]);
  5505. if (result) {
  5506. if (index >= ordersLength) {
  5507. return result;
  5508. }
  5509. var order = orders[index];
  5510. return result * (order == 'desc' ? -1 : 1);
  5511. }
  5512. }
  5513. // Fixes an `Array#sort` bug in the JS engine embedded in Adobe applications
  5514. // that causes it, under certain circumstances, to provide the same value for
  5515. // `object` and `other`. See https://github.com/jashkenas/underscore/pull/1247
  5516. // for more details.
  5517. //
  5518. // This also ensures a stable sort in V8 and other engines.
  5519. // See https://bugs.chromium.org/p/v8/issues/detail?id=90 for more details.
  5520. return object.index - other.index;
  5521. }
  5522. /**
  5523. * Creates an array that is the composition of partially applied arguments,
  5524. * placeholders, and provided arguments into a single array of arguments.
  5525. *
  5526. * @private
  5527. * @param {Array} args The provided arguments.
  5528. * @param {Array} partials The arguments to prepend to those provided.
  5529. * @param {Array} holders The `partials` placeholder indexes.
  5530. * @params {boolean} [isCurried] Specify composing for a curried function.
  5531. * @returns {Array} Returns the new array of composed arguments.
  5532. */
  5533. function composeArgs(args, partials, holders, isCurried) {
  5534. var argsIndex = -1,
  5535. argsLength = args.length,
  5536. holdersLength = holders.length,
  5537. leftIndex = -1,
  5538. leftLength = partials.length,
  5539. rangeLength = nativeMax(argsLength - holdersLength, 0),
  5540. result = Array(leftLength + rangeLength),
  5541. isUncurried = !isCurried;
  5542. while (++leftIndex < leftLength) {
  5543. result[leftIndex] = partials[leftIndex];
  5544. }
  5545. while (++argsIndex < holdersLength) {
  5546. if (isUncurried || argsIndex < argsLength) {
  5547. result[holders[argsIndex]] = args[argsIndex];
  5548. }
  5549. }
  5550. while (rangeLength--) {
  5551. result[leftIndex++] = args[argsIndex++];
  5552. }
  5553. return result;
  5554. }
  5555. /**
  5556. * This function is like `composeArgs` except that the arguments composition
  5557. * is tailored for `_.partialRight`.
  5558. *
  5559. * @private
  5560. * @param {Array} args The provided arguments.
  5561. * @param {Array} partials The arguments to append to those provided.
  5562. * @param {Array} holders The `partials` placeholder indexes.
  5563. * @params {boolean} [isCurried] Specify composing for a curried function.
  5564. * @returns {Array} Returns the new array of composed arguments.
  5565. */
  5566. function composeArgsRight(args, partials, holders, isCurried) {
  5567. var argsIndex = -1,
  5568. argsLength = args.length,
  5569. holdersIndex = -1,
  5570. holdersLength = holders.length,
  5571. rightIndex = -1,
  5572. rightLength = partials.length,
  5573. rangeLength = nativeMax(argsLength - holdersLength, 0),
  5574. result = Array(rangeLength + rightLength),
  5575. isUncurried = !isCurried;
  5576. while (++argsIndex < rangeLength) {
  5577. result[argsIndex] = args[argsIndex];
  5578. }
  5579. var offset = argsIndex;
  5580. while (++rightIndex < rightLength) {
  5581. result[offset + rightIndex] = partials[rightIndex];
  5582. }
  5583. while (++holdersIndex < holdersLength) {
  5584. if (isUncurried || argsIndex < argsLength) {
  5585. result[offset + holders[holdersIndex]] = args[argsIndex++];
  5586. }
  5587. }
  5588. return result;
  5589. }
  5590. /**
  5591. * Copies the values of `source` to `array`.
  5592. *
  5593. * @private
  5594. * @param {Array} source The array to copy values from.
  5595. * @param {Array} [array=[]] The array to copy values to.
  5596. * @returns {Array} Returns `array`.
  5597. */
  5598. function copyArray(source, array) {
  5599. var index = -1,
  5600. length = source.length;
  5601. array || (array = Array(length));
  5602. while (++index < length) {
  5603. array[index] = source[index];
  5604. }
  5605. return array;
  5606. }
  5607. /**
  5608. * Copies properties of `source` to `object`.
  5609. *
  5610. * @private
  5611. * @param {Object} source The object to copy properties from.
  5612. * @param {Array} props The property identifiers to copy.
  5613. * @param {Object} [object={}] The object to copy properties to.
  5614. * @param {Function} [customizer] The function to customize copied values.
  5615. * @returns {Object} Returns `object`.
  5616. */
  5617. function copyObject(source, props, object, customizer) {
  5618. var isNew = !object;
  5619. object || (object = {});
  5620. var index = -1,
  5621. length = props.length;
  5622. while (++index < length) {
  5623. var key = props[index];
  5624. var newValue = customizer
  5625. ? customizer(object[key], source[key], key, object, source)
  5626. : undefined;
  5627. if (newValue === undefined) {
  5628. newValue = source[key];
  5629. }
  5630. if (isNew) {
  5631. baseAssignValue(object, key, newValue);
  5632. } else {
  5633. assignValue(object, key, newValue);
  5634. }
  5635. }
  5636. return object;
  5637. }
  5638. /**
  5639. * Copies own symbols of `source` to `object`.
  5640. *
  5641. * @private
  5642. * @param {Object} source The object to copy symbols from.
  5643. * @param {Object} [object={}] The object to copy symbols to.
  5644. * @returns {Object} Returns `object`.
  5645. */
  5646. function copySymbols(source, object) {
  5647. return copyObject(source, getSymbols(source), object);
  5648. }
  5649. /**
  5650. * Copies own and inherited symbols of `source` to `object`.
  5651. *
  5652. * @private
  5653. * @param {Object} source The object to copy symbols from.
  5654. * @param {Object} [object={}] The object to copy symbols to.
  5655. * @returns {Object} Returns `object`.
  5656. */
  5657. function copySymbolsIn(source, object) {
  5658. return copyObject(source, getSymbolsIn(source), object);
  5659. }
  5660. /**
  5661. * Creates a function like `_.groupBy`.
  5662. *
  5663. * @private
  5664. * @param {Function} setter The function to set accumulator values.
  5665. * @param {Function} [initializer] The accumulator object initializer.
  5666. * @returns {Function} Returns the new aggregator function.
  5667. */
  5668. function createAggregator(setter, initializer) {
  5669. return function(collection, iteratee) {
  5670. var func = isArray(collection) ? arrayAggregator : baseAggregator,
  5671. accumulator = initializer ? initializer() : {};
  5672. return func(collection, setter, getIteratee(iteratee, 2), accumulator);
  5673. };
  5674. }
  5675. /**
  5676. * Creates a function like `_.assign`.
  5677. *
  5678. * @private
  5679. * @param {Function} assigner The function to assign values.
  5680. * @returns {Function} Returns the new assigner function.
  5681. */
  5682. function createAssigner(assigner) {
  5683. return baseRest(function(object, sources) {
  5684. var index = -1,
  5685. length = sources.length,
  5686. customizer = length > 1 ? sources[length - 1] : undefined,
  5687. guard = length > 2 ? sources[2] : undefined;
  5688. customizer = (assigner.length > 3 && typeof customizer == 'function')
  5689. ? (length--, customizer)
  5690. : undefined;
  5691. if (guard && isIterateeCall(sources[0], sources[1], guard)) {
  5692. customizer = length < 3 ? undefined : customizer;
  5693. length = 1;
  5694. }
  5695. object = Object(object);
  5696. while (++index < length) {
  5697. var source = sources[index];
  5698. if (source) {
  5699. assigner(object, source, index, customizer);
  5700. }
  5701. }
  5702. return object;
  5703. });
  5704. }
  5705. /**
  5706. * Creates a `baseEach` or `baseEachRight` function.
  5707. *
  5708. * @private
  5709. * @param {Function} eachFunc The function to iterate over a collection.
  5710. * @param {boolean} [fromRight] Specify iterating from right to left.
  5711. * @returns {Function} Returns the new base function.
  5712. */
  5713. function createBaseEach(eachFunc, fromRight) {
  5714. return function(collection, iteratee) {
  5715. if (collection == null) {
  5716. return collection;
  5717. }
  5718. if (!isArrayLike(collection)) {
  5719. return eachFunc(collection, iteratee);
  5720. }
  5721. var length = collection.length,
  5722. index = fromRight ? length : -1,
  5723. iterable = Object(collection);
  5724. while ((fromRight ? index-- : ++index < length)) {
  5725. if (iteratee(iterable[index], index, iterable) === false) {
  5726. break;
  5727. }
  5728. }
  5729. return collection;
  5730. };
  5731. }
  5732. /**
  5733. * Creates a base function for methods like `_.forIn` and `_.forOwn`.
  5734. *
  5735. * @private
  5736. * @param {boolean} [fromRight] Specify iterating from right to left.
  5737. * @returns {Function} Returns the new base function.
  5738. */
  5739. function createBaseFor(fromRight) {
  5740. return function(object, iteratee, keysFunc) {
  5741. var index = -1,
  5742. iterable = Object(object),
  5743. props = keysFunc(object),
  5744. length = props.length;
  5745. while (length--) {
  5746. var key = props[fromRight ? length : ++index];
  5747. if (iteratee(iterable[key], key, iterable) === false) {
  5748. break;
  5749. }
  5750. }
  5751. return object;
  5752. };
  5753. }
  5754. /**
  5755. * Creates a function that wraps `func` to invoke it with the optional `this`
  5756. * binding of `thisArg`.
  5757. *
  5758. * @private
  5759. * @param {Function} func The function to wrap.
  5760. * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
  5761. * @param {*} [thisArg] The `this` binding of `func`.
  5762. * @returns {Function} Returns the new wrapped function.
  5763. */
  5764. function createBind(func, bitmask, thisArg) {
  5765. var isBind = bitmask & WRAP_BIND_FLAG,
  5766. Ctor = createCtor(func);
  5767. function wrapper() {
  5768. var fn = (this && this !== root && this instanceof wrapper) ? Ctor : func;
  5769. return fn.apply(isBind ? thisArg : this, arguments);
  5770. }
  5771. return wrapper;
  5772. }
  5773. /**
  5774. * Creates a function like `_.lowerFirst`.
  5775. *
  5776. * @private
  5777. * @param {string} methodName The name of the `String` case method to use.
  5778. * @returns {Function} Returns the new case function.
  5779. */
  5780. function createCaseFirst(methodName) {
  5781. return function(string) {
  5782. string = toString(string);
  5783. var strSymbols = hasUnicode(string)
  5784. ? stringToArray(string)
  5785. : undefined;
  5786. var chr = strSymbols
  5787. ? strSymbols[0]
  5788. : string.charAt(0);
  5789. var trailing = strSymbols
  5790. ? castSlice(strSymbols, 1).join('')
  5791. : string.slice(1);
  5792. return chr[methodName]() + trailing;
  5793. };
  5794. }
  5795. /**
  5796. * Creates a function like `_.camelCase`.
  5797. *
  5798. * @private
  5799. * @param {Function} callback The function to combine each word.
  5800. * @returns {Function} Returns the new compounder function.
  5801. */
  5802. function createCompounder(callback) {
  5803. return function(string) {
  5804. return arrayReduce(words(deburr(string).replace(reApos, '')), callback, '');
  5805. };
  5806. }
  5807. /**
  5808. * Creates a function that produces an instance of `Ctor` regardless of
  5809. * whether it was invoked as part of a `new` expression or by `call` or `apply`.
  5810. *
  5811. * @private
  5812. * @param {Function} Ctor The constructor to wrap.
  5813. * @returns {Function} Returns the new wrapped function.
  5814. */
  5815. function createCtor(Ctor) {
  5816. return function() {
  5817. // Use a `switch` statement to work with class constructors. See
  5818. // http://ecma-international.org/ecma-262/7.0/#sec-ecmascript-function-objects-call-thisargument-argumentslist
  5819. // for more details.
  5820. var args = arguments;
  5821. switch (args.length) {
  5822. case 0: return new Ctor;
  5823. case 1: return new Ctor(args[0]);
  5824. case 2: return new Ctor(args[0], args[1]);
  5825. case 3: return new Ctor(args[0], args[1], args[2]);
  5826. case 4: return new Ctor(args[0], args[1], args[2], args[3]);
  5827. case 5: return new Ctor(args[0], args[1], args[2], args[3], args[4]);
  5828. case 6: return new Ctor(args[0], args[1], args[2], args[3], args[4], args[5]);
  5829. case 7: return new Ctor(args[0], args[1], args[2], args[3], args[4], args[5], args[6]);
  5830. }
  5831. var thisBinding = baseCreate(Ctor.prototype),
  5832. result = Ctor.apply(thisBinding, args);
  5833. // Mimic the constructor's `return` behavior.
  5834. // See https://es5.github.io/#x13.2.2 for more details.
  5835. return isObject(result) ? result : thisBinding;
  5836. };
  5837. }
  5838. /**
  5839. * Creates a function that wraps `func` to enable currying.
  5840. *
  5841. * @private
  5842. * @param {Function} func The function to wrap.
  5843. * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
  5844. * @param {number} arity The arity of `func`.
  5845. * @returns {Function} Returns the new wrapped function.
  5846. */
  5847. function createCurry(func, bitmask, arity) {
  5848. var Ctor = createCtor(func);
  5849. function wrapper() {
  5850. var length = arguments.length,
  5851. args = Array(length),
  5852. index = length,
  5853. placeholder = getHolder(wrapper);
  5854. while (index--) {
  5855. args[index] = arguments[index];
  5856. }
  5857. var holders = (length < 3 && args[0] !== placeholder && args[length - 1] !== placeholder)
  5858. ? []
  5859. : replaceHolders(args, placeholder);
  5860. length -= holders.length;
  5861. if (length < arity) {
  5862. return createRecurry(
  5863. func, bitmask, createHybrid, wrapper.placeholder, undefined,
  5864. args, holders, undefined, undefined, arity - length);
  5865. }
  5866. var fn = (this && this !== root && this instanceof wrapper) ? Ctor : func;
  5867. return apply(fn, this, args);
  5868. }
  5869. return wrapper;
  5870. }
  5871. /**
  5872. * Creates a `_.find` or `_.findLast` function.
  5873. *
  5874. * @private
  5875. * @param {Function} findIndexFunc The function to find the collection index.
  5876. * @returns {Function} Returns the new find function.
  5877. */
  5878. function createFind(findIndexFunc) {
  5879. return function(collection, predicate, fromIndex) {
  5880. var iterable = Object(collection);
  5881. if (!isArrayLike(collection)) {
  5882. var iteratee = getIteratee(predicate, 3);
  5883. collection = keys(collection);
  5884. predicate = function(key) { return iteratee(iterable[key], key, iterable); };
  5885. }
  5886. var index = findIndexFunc(collection, predicate, fromIndex);
  5887. return index > -1 ? iterable[iteratee ? collection[index] : index] : undefined;
  5888. };
  5889. }
  5890. /**
  5891. * Creates a `_.flow` or `_.flowRight` function.
  5892. *
  5893. * @private
  5894. * @param {boolean} [fromRight] Specify iterating from right to left.
  5895. * @returns {Function} Returns the new flow function.
  5896. */
  5897. function createFlow(fromRight) {
  5898. return flatRest(function(funcs) {
  5899. var length = funcs.length,
  5900. index = length,
  5901. prereq = LodashWrapper.prototype.thru;
  5902. if (fromRight) {
  5903. funcs.reverse();
  5904. }
  5905. while (index--) {
  5906. var func = funcs[index];
  5907. if (typeof func != 'function') {
  5908. throw new TypeError(FUNC_ERROR_TEXT);
  5909. }
  5910. if (prereq && !wrapper && getFuncName(func) == 'wrapper') {
  5911. var wrapper = new LodashWrapper([], true);
  5912. }
  5913. }
  5914. index = wrapper ? index : length;
  5915. while (++index < length) {
  5916. func = funcs[index];
  5917. var funcName = getFuncName(func),
  5918. data = funcName == 'wrapper' ? getData(func) : undefined;
  5919. if (data && isLaziable(data[0]) &&
  5920. data[1] == (WRAP_ARY_FLAG | WRAP_CURRY_FLAG | WRAP_PARTIAL_FLAG | WRAP_REARG_FLAG) &&
  5921. !data[4].length && data[9] == 1
  5922. ) {
  5923. wrapper = wrapper[getFuncName(data[0])].apply(wrapper, data[3]);
  5924. } else {
  5925. wrapper = (func.length == 1 && isLaziable(func))
  5926. ? wrapper[funcName]()
  5927. : wrapper.thru(func);
  5928. }
  5929. }
  5930. return function() {
  5931. var args = arguments,
  5932. value = args[0];
  5933. if (wrapper && args.length == 1 && isArray(value)) {
  5934. return wrapper.plant(value).value();
  5935. }
  5936. var index = 0,
  5937. result = length ? funcs[index].apply(this, args) : value;
  5938. while (++index < length) {
  5939. result = funcs[index].call(this, result);
  5940. }
  5941. return result;
  5942. };
  5943. });
  5944. }
  5945. /**
  5946. * Creates a function that wraps `func` to invoke it with optional `this`
  5947. * binding of `thisArg`, partial application, and currying.
  5948. *
  5949. * @private
  5950. * @param {Function|string} func The function or method name to wrap.
  5951. * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
  5952. * @param {*} [thisArg] The `this` binding of `func`.
  5953. * @param {Array} [partials] The arguments to prepend to those provided to
  5954. * the new function.
  5955. * @param {Array} [holders] The `partials` placeholder indexes.
  5956. * @param {Array} [partialsRight] The arguments to append to those provided
  5957. * to the new function.
  5958. * @param {Array} [holdersRight] The `partialsRight` placeholder indexes.
  5959. * @param {Array} [argPos] The argument positions of the new function.
  5960. * @param {number} [ary] The arity cap of `func`.
  5961. * @param {number} [arity] The arity of `func`.
  5962. * @returns {Function} Returns the new wrapped function.
  5963. */
  5964. function createHybrid(func, bitmask, thisArg, partials, holders, partialsRight, holdersRight, argPos, ary, arity) {
  5965. var isAry = bitmask & WRAP_ARY_FLAG,
  5966. isBind = bitmask & WRAP_BIND_FLAG,
  5967. isBindKey = bitmask & WRAP_BIND_KEY_FLAG,
  5968. isCurried = bitmask & (WRAP_CURRY_FLAG | WRAP_CURRY_RIGHT_FLAG),
  5969. isFlip = bitmask & WRAP_FLIP_FLAG,
  5970. Ctor = isBindKey ? undefined : createCtor(func);
  5971. function wrapper() {
  5972. var length = arguments.length,
  5973. args = Array(length),
  5974. index = length;
  5975. while (index--) {
  5976. args[index] = arguments[index];
  5977. }
  5978. if (isCurried) {
  5979. var placeholder = getHolder(wrapper),
  5980. holdersCount = countHolders(args, placeholder);
  5981. }
  5982. if (partials) {
  5983. args = composeArgs(args, partials, holders, isCurried);
  5984. }
  5985. if (partialsRight) {
  5986. args = composeArgsRight(args, partialsRight, holdersRight, isCurried);
  5987. }
  5988. length -= holdersCount;
  5989. if (isCurried && length < arity) {
  5990. var newHolders = replaceHolders(args, placeholder);
  5991. return createRecurry(
  5992. func, bitmask, createHybrid, wrapper.placeholder, thisArg,
  5993. args, newHolders, argPos, ary, arity - length
  5994. );
  5995. }
  5996. var thisBinding = isBind ? thisArg : this,
  5997. fn = isBindKey ? thisBinding[func] : func;
  5998. length = args.length;
  5999. if (argPos) {
  6000. args = reorder(args, argPos);
  6001. } else if (isFlip && length > 1) {
  6002. args.reverse();
  6003. }
  6004. if (isAry && ary < length) {
  6005. args.length = ary;
  6006. }
  6007. if (this && this !== root && this instanceof wrapper) {
  6008. fn = Ctor || createCtor(fn);
  6009. }
  6010. return fn.apply(thisBinding, args);
  6011. }
  6012. return wrapper;
  6013. }
  6014. /**
  6015. * Creates a function like `_.invertBy`.
  6016. *
  6017. * @private
  6018. * @param {Function} setter The function to set accumulator values.
  6019. * @param {Function} toIteratee The function to resolve iteratees.
  6020. * @returns {Function} Returns the new inverter function.
  6021. */
  6022. function createInverter(setter, toIteratee) {
  6023. return function(object, iteratee) {
  6024. return baseInverter(object, setter, toIteratee(iteratee), {});
  6025. };
  6026. }
  6027. /**
  6028. * Creates a function that performs a mathematical operation on two values.
  6029. *
  6030. * @private
  6031. * @param {Function} operator The function to perform the operation.
  6032. * @param {number} [defaultValue] The value used for `undefined` arguments.
  6033. * @returns {Function} Returns the new mathematical operation function.
  6034. */
  6035. function createMathOperation(operator, defaultValue) {
  6036. return function(value, other) {
  6037. var result;
  6038. if (value === undefined && other === undefined) {
  6039. return defaultValue;
  6040. }
  6041. if (value !== undefined) {
  6042. result = value;
  6043. }
  6044. if (other !== undefined) {
  6045. if (result === undefined) {
  6046. return other;
  6047. }
  6048. if (typeof value == 'string' || typeof other == 'string') {
  6049. value = baseToString(value);
  6050. other = baseToString(other);
  6051. } else {
  6052. value = baseToNumber(value);
  6053. other = baseToNumber(other);
  6054. }
  6055. result = operator(value, other);
  6056. }
  6057. return result;
  6058. };
  6059. }
  6060. /**
  6061. * Creates a function like `_.over`.
  6062. *
  6063. * @private
  6064. * @param {Function} arrayFunc The function to iterate over iteratees.
  6065. * @returns {Function} Returns the new over function.
  6066. */
  6067. function createOver(arrayFunc) {
  6068. return flatRest(function(iteratees) {
  6069. iteratees = arrayMap(iteratees, baseUnary(getIteratee()));
  6070. return baseRest(function(args) {
  6071. var thisArg = this;
  6072. return arrayFunc(iteratees, function(iteratee) {
  6073. return apply(iteratee, thisArg, args);
  6074. });
  6075. });
  6076. });
  6077. }
  6078. /**
  6079. * Creates the padding for `string` based on `length`. The `chars` string
  6080. * is truncated if the number of characters exceeds `length`.
  6081. *
  6082. * @private
  6083. * @param {number} length The padding length.
  6084. * @param {string} [chars=' '] The string used as padding.
  6085. * @returns {string} Returns the padding for `string`.
  6086. */
  6087. function createPadding(length, chars) {
  6088. chars = chars === undefined ? ' ' : baseToString(chars);
  6089. var charsLength = chars.length;
  6090. if (charsLength < 2) {
  6091. return charsLength ? baseRepeat(chars, length) : chars;
  6092. }
  6093. var result = baseRepeat(chars, nativeCeil(length / stringSize(chars)));
  6094. return hasUnicode(chars)
  6095. ? castSlice(stringToArray(result), 0, length).join('')
  6096. : result.slice(0, length);
  6097. }
  6098. /**
  6099. * Creates a function that wraps `func` to invoke it with the `this` binding
  6100. * of `thisArg` and `partials` prepended to the arguments it receives.
  6101. *
  6102. * @private
  6103. * @param {Function} func The function to wrap.
  6104. * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
  6105. * @param {*} thisArg The `this` binding of `func`.
  6106. * @param {Array} partials The arguments to prepend to those provided to
  6107. * the new function.
  6108. * @returns {Function} Returns the new wrapped function.
  6109. */
  6110. function createPartial(func, bitmask, thisArg, partials) {
  6111. var isBind = bitmask & WRAP_BIND_FLAG,
  6112. Ctor = createCtor(func);
  6113. function wrapper() {
  6114. var argsIndex = -1,
  6115. argsLength = arguments.length,
  6116. leftIndex = -1,
  6117. leftLength = partials.length,
  6118. args = Array(leftLength + argsLength),
  6119. fn = (this && this !== root && this instanceof wrapper) ? Ctor : func;
  6120. while (++leftIndex < leftLength) {
  6121. args[leftIndex] = partials[leftIndex];
  6122. }
  6123. while (argsLength--) {
  6124. args[leftIndex++] = arguments[++argsIndex];
  6125. }
  6126. return apply(fn, isBind ? thisArg : this, args);
  6127. }
  6128. return wrapper;
  6129. }
  6130. /**
  6131. * Creates a `_.range` or `_.rangeRight` function.
  6132. *
  6133. * @private
  6134. * @param {boolean} [fromRight] Specify iterating from right to left.
  6135. * @returns {Function} Returns the new range function.
  6136. */
  6137. function createRange(fromRight) {
  6138. return function(start, end, step) {
  6139. if (step && typeof step != 'number' && isIterateeCall(start, end, step)) {
  6140. end = step = undefined;
  6141. }
  6142. // Ensure the sign of `-0` is preserved.
  6143. start = toFinite(start);
  6144. if (end === undefined) {
  6145. end = start;
  6146. start = 0;
  6147. } else {
  6148. end = toFinite(end);
  6149. }
  6150. step = step === undefined ? (start < end ? 1 : -1) : toFinite(step);
  6151. return baseRange(start, end, step, fromRight);
  6152. };
  6153. }
  6154. /**
  6155. * Creates a function that performs a relational operation on two values.
  6156. *
  6157. * @private
  6158. * @param {Function} operator The function to perform the operation.
  6159. * @returns {Function} Returns the new relational operation function.
  6160. */
  6161. function createRelationalOperation(operator) {
  6162. return function(value, other) {
  6163. if (!(typeof value == 'string' && typeof other == 'string')) {
  6164. value = toNumber(value);
  6165. other = toNumber(other);
  6166. }
  6167. return operator(value, other);
  6168. };
  6169. }
  6170. /**
  6171. * Creates a function that wraps `func` to continue currying.
  6172. *
  6173. * @private
  6174. * @param {Function} func The function to wrap.
  6175. * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
  6176. * @param {Function} wrapFunc The function to create the `func` wrapper.
  6177. * @param {*} placeholder The placeholder value.
  6178. * @param {*} [thisArg] The `this` binding of `func`.
  6179. * @param {Array} [partials] The arguments to prepend to those provided to
  6180. * the new function.
  6181. * @param {Array} [holders] The `partials` placeholder indexes.
  6182. * @param {Array} [argPos] The argument positions of the new function.
  6183. * @param {number} [ary] The arity cap of `func`.
  6184. * @param {number} [arity] The arity of `func`.
  6185. * @returns {Function} Returns the new wrapped function.
  6186. */
  6187. function createRecurry(func, bitmask, wrapFunc, placeholder, thisArg, partials, holders, argPos, ary, arity) {
  6188. var isCurry = bitmask & WRAP_CURRY_FLAG,
  6189. newHolders = isCurry ? holders : undefined,
  6190. newHoldersRight = isCurry ? undefined : holders,
  6191. newPartials = isCurry ? partials : undefined,
  6192. newPartialsRight = isCurry ? undefined : partials;
  6193. bitmask |= (isCurry ? WRAP_PARTIAL_FLAG : WRAP_PARTIAL_RIGHT_FLAG);
  6194. bitmask &= ~(isCurry ? WRAP_PARTIAL_RIGHT_FLAG : WRAP_PARTIAL_FLAG);
  6195. if (!(bitmask & WRAP_CURRY_BOUND_FLAG)) {
  6196. bitmask &= ~(WRAP_BIND_FLAG | WRAP_BIND_KEY_FLAG);
  6197. }
  6198. var newData = [
  6199. func, bitmask, thisArg, newPartials, newHolders, newPartialsRight,
  6200. newHoldersRight, argPos, ary, arity
  6201. ];
  6202. var result = wrapFunc.apply(undefined, newData);
  6203. if (isLaziable(func)) {
  6204. setData(result, newData);
  6205. }
  6206. result.placeholder = placeholder;
  6207. return setWrapToString(result, func, bitmask);
  6208. }
  6209. /**
  6210. * Creates a function like `_.round`.
  6211. *
  6212. * @private
  6213. * @param {string} methodName The name of the `Math` method to use when rounding.
  6214. * @returns {Function} Returns the new round function.
  6215. */
  6216. function createRound(methodName) {
  6217. var func = Math[methodName];
  6218. return function(number, precision) {
  6219. number = toNumber(number);
  6220. precision = precision == null ? 0 : nativeMin(toInteger(precision), 292);
  6221. if (precision) {
  6222. // Shift with exponential notation to avoid floating-point issues.
  6223. // See [MDN](https://mdn.io/round#Examples) for more details.
  6224. var pair = (toString(number) + 'e').split('e'),
  6225. value = func(pair[0] + 'e' + (+pair[1] + precision));
  6226. pair = (toString(value) + 'e').split('e');
  6227. return +(pair[0] + 'e' + (+pair[1] - precision));
  6228. }
  6229. return func(number);
  6230. };
  6231. }
  6232. /**
  6233. * Creates a set object of `values`.
  6234. *
  6235. * @private
  6236. * @param {Array} values The values to add to the set.
  6237. * @returns {Object} Returns the new set.
  6238. */
  6239. var createSet = !(Set && (1 / setToArray(new Set([,-0]))[1]) == INFINITY) ? noop : function(values) {
  6240. return new Set(values);
  6241. };
  6242. /**
  6243. * Creates a `_.toPairs` or `_.toPairsIn` function.
  6244. *
  6245. * @private
  6246. * @param {Function} keysFunc The function to get the keys of a given object.
  6247. * @returns {Function} Returns the new pairs function.
  6248. */
  6249. function createToPairs(keysFunc) {
  6250. return function(object) {
  6251. var tag = getTag(object);
  6252. if (tag == mapTag) {
  6253. return mapToArray(object);
  6254. }
  6255. if (tag == setTag) {
  6256. return setToPairs(object);
  6257. }
  6258. return baseToPairs(object, keysFunc(object));
  6259. };
  6260. }
  6261. /**
  6262. * Creates a function that either curries or invokes `func` with optional
  6263. * `this` binding and partially applied arguments.
  6264. *
  6265. * @private
  6266. * @param {Function|string} func The function or method name to wrap.
  6267. * @param {number} bitmask The bitmask flags.
  6268. * 1 - `_.bind`
  6269. * 2 - `_.bindKey`
  6270. * 4 - `_.curry` or `_.curryRight` of a bound function
  6271. * 8 - `_.curry`
  6272. * 16 - `_.curryRight`
  6273. * 32 - `_.partial`
  6274. * 64 - `_.partialRight`
  6275. * 128 - `_.rearg`
  6276. * 256 - `_.ary`
  6277. * 512 - `_.flip`
  6278. * @param {*} [thisArg] The `this` binding of `func`.
  6279. * @param {Array} [partials] The arguments to be partially applied.
  6280. * @param {Array} [holders] The `partials` placeholder indexes.
  6281. * @param {Array} [argPos] The argument positions of the new function.
  6282. * @param {number} [ary] The arity cap of `func`.
  6283. * @param {number} [arity] The arity of `func`.
  6284. * @returns {Function} Returns the new wrapped function.
  6285. */
  6286. function createWrap(func, bitmask, thisArg, partials, holders, argPos, ary, arity) {
  6287. var isBindKey = bitmask & WRAP_BIND_KEY_FLAG;
  6288. if (!isBindKey && typeof func != 'function') {
  6289. throw new TypeError(FUNC_ERROR_TEXT);
  6290. }
  6291. var length = partials ? partials.length : 0;
  6292. if (!length) {
  6293. bitmask &= ~(WRAP_PARTIAL_FLAG | WRAP_PARTIAL_RIGHT_FLAG);
  6294. partials = holders = undefined;
  6295. }
  6296. ary = ary === undefined ? ary : nativeMax(toInteger(ary), 0);
  6297. arity = arity === undefined ? arity : toInteger(arity);
  6298. length -= holders ? holders.length : 0;
  6299. if (bitmask & WRAP_PARTIAL_RIGHT_FLAG) {
  6300. var partialsRight = partials,
  6301. holdersRight = holders;
  6302. partials = holders = undefined;
  6303. }
  6304. var data = isBindKey ? undefined : getData(func);
  6305. var newData = [
  6306. func, bitmask, thisArg, partials, holders, partialsRight, holdersRight,
  6307. argPos, ary, arity
  6308. ];
  6309. if (data) {
  6310. mergeData(newData, data);
  6311. }
  6312. func = newData[0];
  6313. bitmask = newData[1];
  6314. thisArg = newData[2];
  6315. partials = newData[3];
  6316. holders = newData[4];
  6317. arity = newData[9] = newData[9] === undefined
  6318. ? (isBindKey ? 0 : func.length)
  6319. : nativeMax(newData[9] - length, 0);
  6320. if (!arity && bitmask & (WRAP_CURRY_FLAG | WRAP_CURRY_RIGHT_FLAG)) {
  6321. bitmask &= ~(WRAP_CURRY_FLAG | WRAP_CURRY_RIGHT_FLAG);
  6322. }
  6323. if (!bitmask || bitmask == WRAP_BIND_FLAG) {
  6324. var result = createBind(func, bitmask, thisArg);
  6325. } else if (bitmask == WRAP_CURRY_FLAG || bitmask == WRAP_CURRY_RIGHT_FLAG) {
  6326. result = createCurry(func, bitmask, arity);
  6327. } else if ((bitmask == WRAP_PARTIAL_FLAG || bitmask == (WRAP_BIND_FLAG | WRAP_PARTIAL_FLAG)) && !holders.length) {
  6328. result = createPartial(func, bitmask, thisArg, partials);
  6329. } else {
  6330. result = createHybrid.apply(undefined, newData);
  6331. }
  6332. var setter = data ? baseSetData : setData;
  6333. return setWrapToString(setter(result, newData), func, bitmask);
  6334. }
  6335. /**
  6336. * Used by `_.defaults` to customize its `_.assignIn` use to assign properties
  6337. * of source objects to the destination object for all destination properties
  6338. * that resolve to `undefined`.
  6339. *
  6340. * @private
  6341. * @param {*} objValue The destination value.
  6342. * @param {*} srcValue The source value.
  6343. * @param {string} key The key of the property to assign.
  6344. * @param {Object} object The parent object of `objValue`.
  6345. * @returns {*} Returns the value to assign.
  6346. */
  6347. function customDefaultsAssignIn(objValue, srcValue, key, object) {
  6348. if (objValue === undefined ||
  6349. (eq(objValue, objectProto[key]) && !hasOwnProperty.call(object, key))) {
  6350. return srcValue;
  6351. }
  6352. return objValue;
  6353. }
  6354. /**
  6355. * Used by `_.defaultsDeep` to customize its `_.merge` use to merge source
  6356. * objects into destination objects that are passed thru.
  6357. *
  6358. * @private
  6359. * @param {*} objValue The destination value.
  6360. * @param {*} srcValue The source value.
  6361. * @param {string} key The key of the property to merge.
  6362. * @param {Object} object The parent object of `objValue`.
  6363. * @param {Object} source The parent object of `srcValue`.
  6364. * @param {Object} [stack] Tracks traversed source values and their merged
  6365. * counterparts.
  6366. * @returns {*} Returns the value to assign.
  6367. */
  6368. function customDefaultsMerge(objValue, srcValue, key, object, source, stack) {
  6369. if (isObject(objValue) && isObject(srcValue)) {
  6370. // Recursively merge objects and arrays (susceptible to call stack limits).
  6371. stack.set(srcValue, objValue);
  6372. baseMerge(objValue, srcValue, undefined, customDefaultsMerge, stack);
  6373. stack['delete'](srcValue);
  6374. }
  6375. return objValue;
  6376. }
  6377. /**
  6378. * Used by `_.omit` to customize its `_.cloneDeep` use to only clone plain
  6379. * objects.
  6380. *
  6381. * @private
  6382. * @param {*} value The value to inspect.
  6383. * @param {string} key The key of the property to inspect.
  6384. * @returns {*} Returns the uncloned value or `undefined` to defer cloning to `_.cloneDeep`.
  6385. */
  6386. function customOmitClone(value) {
  6387. return isPlainObject(value) ? undefined : value;
  6388. }
  6389. /**
  6390. * A specialized version of `baseIsEqualDeep` for arrays with support for
  6391. * partial deep comparisons.
  6392. *
  6393. * @private
  6394. * @param {Array} array The array to compare.
  6395. * @param {Array} other The other array to compare.
  6396. * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.
  6397. * @param {Function} customizer The function to customize comparisons.
  6398. * @param {Function} equalFunc The function to determine equivalents of values.
  6399. * @param {Object} stack Tracks traversed `array` and `other` objects.
  6400. * @returns {boolean} Returns `true` if the arrays are equivalent, else `false`.
  6401. */
  6402. function equalArrays(array, other, bitmask, customizer, equalFunc, stack) {
  6403. var isPartial = bitmask & COMPARE_PARTIAL_FLAG,
  6404. arrLength = array.length,
  6405. othLength = other.length;
  6406. if (arrLength != othLength && !(isPartial && othLength > arrLength)) {
  6407. return false;
  6408. }
  6409. // Assume cyclic values are equal.
  6410. var stacked = stack.get(array);
  6411. if (stacked && stack.get(other)) {
  6412. return stacked == other;
  6413. }
  6414. var index = -1,
  6415. result = true,
  6416. seen = (bitmask & COMPARE_UNORDERED_FLAG) ? new SetCache : undefined;
  6417. stack.set(array, other);
  6418. stack.set(other, array);
  6419. // Ignore non-index properties.
  6420. while (++index < arrLength) {
  6421. var arrValue = array[index],
  6422. othValue = other[index];
  6423. if (customizer) {
  6424. var compared = isPartial
  6425. ? customizer(othValue, arrValue, index, other, array, stack)
  6426. : customizer(arrValue, othValue, index, array, other, stack);
  6427. }
  6428. if (compared !== undefined) {
  6429. if (compared) {
  6430. continue;
  6431. }
  6432. result = false;
  6433. break;
  6434. }
  6435. // Recursively compare arrays (susceptible to call stack limits).
  6436. if (seen) {
  6437. if (!arraySome(other, function(othValue, othIndex) {
  6438. if (!cacheHas(seen, othIndex) &&
  6439. (arrValue === othValue || equalFunc(arrValue, othValue, bitmask, customizer, stack))) {
  6440. return seen.push(othIndex);
  6441. }
  6442. })) {
  6443. result = false;
  6444. break;
  6445. }
  6446. } else if (!(
  6447. arrValue === othValue ||
  6448. equalFunc(arrValue, othValue, bitmask, customizer, stack)
  6449. )) {
  6450. result = false;
  6451. break;
  6452. }
  6453. }
  6454. stack['delete'](array);
  6455. stack['delete'](other);
  6456. return result;
  6457. }
  6458. /**
  6459. * A specialized version of `baseIsEqualDeep` for comparing objects of
  6460. * the same `toStringTag`.
  6461. *
  6462. * **Note:** This function only supports comparing values with tags of
  6463. * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`.
  6464. *
  6465. * @private
  6466. * @param {Object} object The object to compare.
  6467. * @param {Object} other The other object to compare.
  6468. * @param {string} tag The `toStringTag` of the objects to compare.
  6469. * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.
  6470. * @param {Function} customizer The function to customize comparisons.
  6471. * @param {Function} equalFunc The function to determine equivalents of values.
  6472. * @param {Object} stack Tracks traversed `object` and `other` objects.
  6473. * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
  6474. */
  6475. function equalByTag(object, other, tag, bitmask, customizer, equalFunc, stack) {
  6476. switch (tag) {
  6477. case dataViewTag:
  6478. if ((object.byteLength != other.byteLength) ||
  6479. (object.byteOffset != other.byteOffset)) {
  6480. return false;
  6481. }
  6482. object = object.buffer;
  6483. other = other.buffer;
  6484. case arrayBufferTag:
  6485. if ((object.byteLength != other.byteLength) ||
  6486. !equalFunc(new Uint8Array(object), new Uint8Array(other))) {
  6487. return false;
  6488. }
  6489. return true;
  6490. case boolTag:
  6491. case dateTag:
  6492. case numberTag:
  6493. // Coerce booleans to `1` or `0` and dates to milliseconds.
  6494. // Invalid dates are coerced to `NaN`.
  6495. return eq(+object, +other);
  6496. case errorTag:
  6497. return object.name == other.name && object.message == other.message;
  6498. case regexpTag:
  6499. case stringTag:
  6500. // Coerce regexes to strings and treat strings, primitives and objects,
  6501. // as equal. See http://www.ecma-international.org/ecma-262/7.0/#sec-regexp.prototype.tostring
  6502. // for more details.
  6503. return object == (other + '');
  6504. case mapTag:
  6505. var convert = mapToArray;
  6506. case setTag:
  6507. var isPartial = bitmask & COMPARE_PARTIAL_FLAG;
  6508. convert || (convert = setToArray);
  6509. if (object.size != other.size && !isPartial) {
  6510. return false;
  6511. }
  6512. // Assume cyclic values are equal.
  6513. var stacked = stack.get(object);
  6514. if (stacked) {
  6515. return stacked == other;
  6516. }
  6517. bitmask |= COMPARE_UNORDERED_FLAG;
  6518. // Recursively compare objects (susceptible to call stack limits).
  6519. stack.set(object, other);
  6520. var result = equalArrays(convert(object), convert(other), bitmask, customizer, equalFunc, stack);
  6521. stack['delete'](object);
  6522. return result;
  6523. case symbolTag:
  6524. if (symbolValueOf) {
  6525. return symbolValueOf.call(object) == symbolValueOf.call(other);
  6526. }
  6527. }
  6528. return false;
  6529. }
  6530. /**
  6531. * A specialized version of `baseIsEqualDeep` for objects with support for
  6532. * partial deep comparisons.
  6533. *
  6534. * @private
  6535. * @param {Object} object The object to compare.
  6536. * @param {Object} other The other object to compare.
  6537. * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.
  6538. * @param {Function} customizer The function to customize comparisons.
  6539. * @param {Function} equalFunc The function to determine equivalents of values.
  6540. * @param {Object} stack Tracks traversed `object` and `other` objects.
  6541. * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
  6542. */
  6543. function equalObjects(object, other, bitmask, customizer, equalFunc, stack) {
  6544. var isPartial = bitmask & COMPARE_PARTIAL_FLAG,
  6545. objProps = getAllKeys(object),
  6546. objLength = objProps.length,
  6547. othProps = getAllKeys(other),
  6548. othLength = othProps.length;
  6549. if (objLength != othLength && !isPartial) {
  6550. return false;
  6551. }
  6552. var index = objLength;
  6553. while (index--) {
  6554. var key = objProps[index];
  6555. if (!(isPartial ? key in other : hasOwnProperty.call(other, key))) {
  6556. return false;
  6557. }
  6558. }
  6559. // Assume cyclic values are equal.
  6560. var stacked = stack.get(object);
  6561. if (stacked && stack.get(other)) {
  6562. return stacked == other;
  6563. }
  6564. var result = true;
  6565. stack.set(object, other);
  6566. stack.set(other, object);
  6567. var skipCtor = isPartial;
  6568. while (++index < objLength) {
  6569. key = objProps[index];
  6570. var objValue = object[key],
  6571. othValue = other[key];
  6572. if (customizer) {
  6573. var compared = isPartial
  6574. ? customizer(othValue, objValue, key, other, object, stack)
  6575. : customizer(objValue, othValue, key, object, other, stack);
  6576. }
  6577. // Recursively compare objects (susceptible to call stack limits).
  6578. if (!(compared === undefined
  6579. ? (objValue === othValue || equalFunc(objValue, othValue, bitmask, customizer, stack))
  6580. : compared
  6581. )) {
  6582. result = false;
  6583. break;
  6584. }
  6585. skipCtor || (skipCtor = key == 'constructor');
  6586. }
  6587. if (result && !skipCtor) {
  6588. var objCtor = object.constructor,
  6589. othCtor = other.constructor;
  6590. // Non `Object` object instances with different constructors are not equal.
  6591. if (objCtor != othCtor &&
  6592. ('constructor' in object && 'constructor' in other) &&
  6593. !(typeof objCtor == 'function' && objCtor instanceof objCtor &&
  6594. typeof othCtor == 'function' && othCtor instanceof othCtor)) {
  6595. result = false;
  6596. }
  6597. }
  6598. stack['delete'](object);
  6599. stack['delete'](other);
  6600. return result;
  6601. }
  6602. /**
  6603. * A specialized version of `baseRest` which flattens the rest array.
  6604. *
  6605. * @private
  6606. * @param {Function} func The function to apply a rest parameter to.
  6607. * @returns {Function} Returns the new function.
  6608. */
  6609. function flatRest(func) {
  6610. return setToString(overRest(func, undefined, flatten), func + '');
  6611. }
  6612. /**
  6613. * Creates an array of own enumerable property names and symbols of `object`.
  6614. *
  6615. * @private
  6616. * @param {Object} object The object to query.
  6617. * @returns {Array} Returns the array of property names and symbols.
  6618. */
  6619. function getAllKeys(object) {
  6620. return baseGetAllKeys(object, keys, getSymbols);
  6621. }
  6622. /**
  6623. * Creates an array of own and inherited enumerable property names and
  6624. * symbols of `object`.
  6625. *
  6626. * @private
  6627. * @param {Object} object The object to query.
  6628. * @returns {Array} Returns the array of property names and symbols.
  6629. */
  6630. function getAllKeysIn(object) {
  6631. return baseGetAllKeys(object, keysIn, getSymbolsIn);
  6632. }
  6633. /**
  6634. * Gets metadata for `func`.
  6635. *
  6636. * @private
  6637. * @param {Function} func The function to query.
  6638. * @returns {*} Returns the metadata for `func`.
  6639. */
  6640. var getData = !metaMap ? noop : function(func) {
  6641. return metaMap.get(func);
  6642. };
  6643. /**
  6644. * Gets the name of `func`.
  6645. *
  6646. * @private
  6647. * @param {Function} func The function to query.
  6648. * @returns {string} Returns the function name.
  6649. */
  6650. function getFuncName(func) {
  6651. var result = (func.name + ''),
  6652. array = realNames[result],
  6653. length = hasOwnProperty.call(realNames, result) ? array.length : 0;
  6654. while (length--) {
  6655. var data = array[length],
  6656. otherFunc = data.func;
  6657. if (otherFunc == null || otherFunc == func) {
  6658. return data.name;
  6659. }
  6660. }
  6661. return result;
  6662. }
  6663. /**
  6664. * Gets the argument placeholder value for `func`.
  6665. *
  6666. * @private
  6667. * @param {Function} func The function to inspect.
  6668. * @returns {*} Returns the placeholder value.
  6669. */
  6670. function getHolder(func) {
  6671. var object = hasOwnProperty.call(lodash, 'placeholder') ? lodash : func;
  6672. return object.placeholder;
  6673. }
  6674. /**
  6675. * Gets the appropriate "iteratee" function. If `_.iteratee` is customized,
  6676. * this function returns the custom method, otherwise it returns `baseIteratee`.
  6677. * If arguments are provided, the chosen function is invoked with them and
  6678. * its result is returned.
  6679. *
  6680. * @private
  6681. * @param {*} [value] The value to convert to an iteratee.
  6682. * @param {number} [arity] The arity of the created iteratee.
  6683. * @returns {Function} Returns the chosen function or its result.
  6684. */
  6685. function getIteratee() {
  6686. var result = lodash.iteratee || iteratee;
  6687. result = result === iteratee ? baseIteratee : result;
  6688. return arguments.length ? result(arguments[0], arguments[1]) : result;
  6689. }
  6690. /**
  6691. * Gets the data for `map`.
  6692. *
  6693. * @private
  6694. * @param {Object} map The map to query.
  6695. * @param {string} key The reference key.
  6696. * @returns {*} Returns the map data.
  6697. */
  6698. function getMapData(map, key) {
  6699. var data = map.__data__;
  6700. return isKeyable(key)
  6701. ? data[typeof key == 'string' ? 'string' : 'hash']
  6702. : data.map;
  6703. }
  6704. /**
  6705. * Gets the property names, values, and compare flags of `object`.
  6706. *
  6707. * @private
  6708. * @param {Object} object The object to query.
  6709. * @returns {Array} Returns the match data of `object`.
  6710. */
  6711. function getMatchData(object) {
  6712. var result = keys(object),
  6713. length = result.length;
  6714. while (length--) {
  6715. var key = result[length],
  6716. value = object[key];
  6717. result[length] = [key, value, isStrictComparable(value)];
  6718. }
  6719. return result;
  6720. }
  6721. /**
  6722. * Gets the native function at `key` of `object`.
  6723. *
  6724. * @private
  6725. * @param {Object} object The object to query.
  6726. * @param {string} key The key of the method to get.
  6727. * @returns {*} Returns the function if it's native, else `undefined`.
  6728. */
  6729. function getNative(object, key) {
  6730. var value = getValue(object, key);
  6731. return baseIsNative(value) ? value : undefined;
  6732. }
  6733. /**
  6734. * A specialized version of `baseGetTag` which ignores `Symbol.toStringTag` values.
  6735. *
  6736. * @private
  6737. * @param {*} value The value to query.
  6738. * @returns {string} Returns the raw `toStringTag`.
  6739. */
  6740. function getRawTag(value) {
  6741. var isOwn = hasOwnProperty.call(value, symToStringTag),
  6742. tag = value[symToStringTag];
  6743. try {
  6744. value[symToStringTag] = undefined;
  6745. var unmasked = true;
  6746. } catch (e) {}
  6747. var result = nativeObjectToString.call(value);
  6748. if (unmasked) {
  6749. if (isOwn) {
  6750. value[symToStringTag] = tag;
  6751. } else {
  6752. delete value[symToStringTag];
  6753. }
  6754. }
  6755. return result;
  6756. }
  6757. /**
  6758. * Creates an array of the own enumerable symbols of `object`.
  6759. *
  6760. * @private
  6761. * @param {Object} object The object to query.
  6762. * @returns {Array} Returns the array of symbols.
  6763. */
  6764. var getSymbols = !nativeGetSymbols ? stubArray : function(object) {
  6765. if (object == null) {
  6766. return [];
  6767. }
  6768. object = Object(object);
  6769. return arrayFilter(nativeGetSymbols(object), function(symbol) {
  6770. return propertyIsEnumerable.call(object, symbol);
  6771. });
  6772. };
  6773. /**
  6774. * Creates an array of the own and inherited enumerable symbols of `object`.
  6775. *
  6776. * @private
  6777. * @param {Object} object The object to query.
  6778. * @returns {Array} Returns the array of symbols.
  6779. */
  6780. var getSymbolsIn = !nativeGetSymbols ? stubArray : function(object) {
  6781. var result = [];
  6782. while (object) {
  6783. arrayPush(result, getSymbols(object));
  6784. object = getPrototype(object);
  6785. }
  6786. return result;
  6787. };
  6788. /**
  6789. * Gets the `toStringTag` of `value`.
  6790. *
  6791. * @private
  6792. * @param {*} value The value to query.
  6793. * @returns {string} Returns the `toStringTag`.
  6794. */
  6795. var getTag = baseGetTag;
  6796. // Fallback for data views, maps, sets, and weak maps in IE 11 and promises in Node.js < 6.
  6797. if ((DataView && getTag(new DataView(new ArrayBuffer(1))) != dataViewTag) ||
  6798. (Map && getTag(new Map) != mapTag) ||
  6799. (Promise && getTag(Promise.resolve()) != promiseTag) ||
  6800. (Set && getTag(new Set) != setTag) ||
  6801. (WeakMap && getTag(new WeakMap) != weakMapTag)) {
  6802. getTag = function(value) {
  6803. var result = baseGetTag(value),
  6804. Ctor = result == objectTag ? value.constructor : undefined,
  6805. ctorString = Ctor ? toSource(Ctor) : '';
  6806. if (ctorString) {
  6807. switch (ctorString) {
  6808. case dataViewCtorString: return dataViewTag;
  6809. case mapCtorString: return mapTag;
  6810. case promiseCtorString: return promiseTag;
  6811. case setCtorString: return setTag;
  6812. case weakMapCtorString: return weakMapTag;
  6813. }
  6814. }
  6815. return result;
  6816. };
  6817. }
  6818. /**
  6819. * Gets the view, applying any `transforms` to the `start` and `end` positions.
  6820. *
  6821. * @private
  6822. * @param {number} start The start of the view.
  6823. * @param {number} end The end of the view.
  6824. * @param {Array} transforms The transformations to apply to the view.
  6825. * @returns {Object} Returns an object containing the `start` and `end`
  6826. * positions of the view.
  6827. */
  6828. function getView(start, end, transforms) {
  6829. var index = -1,
  6830. length = transforms.length;
  6831. while (++index < length) {
  6832. var data = transforms[index],
  6833. size = data.size;
  6834. switch (data.type) {
  6835. case 'drop': start += size; break;
  6836. case 'dropRight': end -= size; break;
  6837. case 'take': end = nativeMin(end, start + size); break;
  6838. case 'takeRight': start = nativeMax(start, end - size); break;
  6839. }
  6840. }
  6841. return { 'start': start, 'end': end };
  6842. }
  6843. /**
  6844. * Extracts wrapper details from the `source` body comment.
  6845. *
  6846. * @private
  6847. * @param {string} source The source to inspect.
  6848. * @returns {Array} Returns the wrapper details.
  6849. */
  6850. function getWrapDetails(source) {
  6851. var match = source.match(reWrapDetails);
  6852. return match ? match[1].split(reSplitDetails) : [];
  6853. }
  6854. /**
  6855. * Checks if `path` exists on `object`.
  6856. *
  6857. * @private
  6858. * @param {Object} object The object to query.
  6859. * @param {Array|string} path The path to check.
  6860. * @param {Function} hasFunc The function to check properties.
  6861. * @returns {boolean} Returns `true` if `path` exists, else `false`.
  6862. */
  6863. function hasPath(object, path, hasFunc) {
  6864. path = castPath(path, object);
  6865. var index = -1,
  6866. length = path.length,
  6867. result = false;
  6868. while (++index < length) {
  6869. var key = toKey(path[index]);
  6870. if (!(result = object != null && hasFunc(object, key))) {
  6871. break;
  6872. }
  6873. object = object[key];
  6874. }
  6875. if (result || ++index != length) {
  6876. return result;
  6877. }
  6878. length = object == null ? 0 : object.length;
  6879. return !!length && isLength(length) && isIndex(key, length) &&
  6880. (isArray(object) || isArguments(object));
  6881. }
  6882. /**
  6883. * Initializes an array clone.
  6884. *
  6885. * @private
  6886. * @param {Array} array The array to clone.
  6887. * @returns {Array} Returns the initialized clone.
  6888. */
  6889. function initCloneArray(array) {
  6890. var length = array.length,
  6891. result = new array.constructor(length);
  6892. // Add properties assigned by `RegExp#exec`.
  6893. if (length && typeof array[0] == 'string' && hasOwnProperty.call(array, 'index')) {
  6894. result.index = array.index;
  6895. result.input = array.input;
  6896. }
  6897. return result;
  6898. }
  6899. /**
  6900. * Initializes an object clone.
  6901. *
  6902. * @private
  6903. * @param {Object} object The object to clone.
  6904. * @returns {Object} Returns the initialized clone.
  6905. */
  6906. function initCloneObject(object) {
  6907. return (typeof object.constructor == 'function' && !isPrototype(object))
  6908. ? baseCreate(getPrototype(object))
  6909. : {};
  6910. }
  6911. /**
  6912. * Initializes an object clone based on its `toStringTag`.
  6913. *
  6914. * **Note:** This function only supports cloning values with tags of
  6915. * `Boolean`, `Date`, `Error`, `Map`, `Number`, `RegExp`, `Set`, or `String`.
  6916. *
  6917. * @private
  6918. * @param {Object} object The object to clone.
  6919. * @param {string} tag The `toStringTag` of the object to clone.
  6920. * @param {boolean} [isDeep] Specify a deep clone.
  6921. * @returns {Object} Returns the initialized clone.
  6922. */
  6923. function initCloneByTag(object, tag, isDeep) {
  6924. var Ctor = object.constructor;
  6925. switch (tag) {
  6926. case arrayBufferTag:
  6927. return cloneArrayBuffer(object);
  6928. case boolTag:
  6929. case dateTag:
  6930. return new Ctor(+object);
  6931. case dataViewTag:
  6932. return cloneDataView(object, isDeep);
  6933. case float32Tag: case float64Tag:
  6934. case int8Tag: case int16Tag: case int32Tag:
  6935. case uint8Tag: case uint8ClampedTag: case uint16Tag: case uint32Tag:
  6936. return cloneTypedArray(object, isDeep);
  6937. case mapTag:
  6938. return new Ctor;
  6939. case numberTag:
  6940. case stringTag:
  6941. return new Ctor(object);
  6942. case regexpTag:
  6943. return cloneRegExp(object);
  6944. case setTag:
  6945. return new Ctor;
  6946. case symbolTag:
  6947. return cloneSymbol(object);
  6948. }
  6949. }
  6950. /**
  6951. * Inserts wrapper `details` in a comment at the top of the `source` body.
  6952. *
  6953. * @private
  6954. * @param {string} source The source to modify.
  6955. * @returns {Array} details The details to insert.
  6956. * @returns {string} Returns the modified source.
  6957. */
  6958. function insertWrapDetails(source, details) {
  6959. var length = details.length;
  6960. if (!length) {
  6961. return source;
  6962. }
  6963. var lastIndex = length - 1;
  6964. details[lastIndex] = (length > 1 ? '& ' : '') + details[lastIndex];
  6965. details = details.join(length > 2 ? ', ' : ' ');
  6966. return source.replace(reWrapComment, '{\n/* [wrapped with ' + details + '] */\n');
  6967. }
  6968. /**
  6969. * Checks if `value` is a flattenable `arguments` object or array.
  6970. *
  6971. * @private
  6972. * @param {*} value The value to check.
  6973. * @returns {boolean} Returns `true` if `value` is flattenable, else `false`.
  6974. */
  6975. function isFlattenable(value) {
  6976. return isArray(value) || isArguments(value) ||
  6977. !!(spreadableSymbol && value && value[spreadableSymbol]);
  6978. }
  6979. /**
  6980. * Checks if `value` is a valid array-like index.
  6981. *
  6982. * @private
  6983. * @param {*} value The value to check.
  6984. * @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index.
  6985. * @returns {boolean} Returns `true` if `value` is a valid index, else `false`.
  6986. */
  6987. function isIndex(value, length) {
  6988. var type = typeof value;
  6989. length = length == null ? MAX_SAFE_INTEGER : length;
  6990. return !!length &&
  6991. (type == 'number' ||
  6992. (type != 'symbol' && reIsUint.test(value))) &&
  6993. (value > -1 && value % 1 == 0 && value < length);
  6994. }
  6995. /**
  6996. * Checks if the given arguments are from an iteratee call.
  6997. *
  6998. * @private
  6999. * @param {*} value The potential iteratee value argument.
  7000. * @param {*} index The potential iteratee index or key argument.
  7001. * @param {*} object The potential iteratee object argument.
  7002. * @returns {boolean} Returns `true` if the arguments are from an iteratee call,
  7003. * else `false`.
  7004. */
  7005. function isIterateeCall(value, index, object) {
  7006. if (!isObject(object)) {
  7007. return false;
  7008. }
  7009. var type = typeof index;
  7010. if (type == 'number'
  7011. ? (isArrayLike(object) && isIndex(index, object.length))
  7012. : (type == 'string' && index in object)
  7013. ) {
  7014. return eq(object[index], value);
  7015. }
  7016. return false;
  7017. }
  7018. /**
  7019. * Checks if `value` is a property name and not a property path.
  7020. *
  7021. * @private
  7022. * @param {*} value The value to check.
  7023. * @param {Object} [object] The object to query keys on.
  7024. * @returns {boolean} Returns `true` if `value` is a property name, else `false`.
  7025. */
  7026. function isKey(value, object) {
  7027. if (isArray(value)) {
  7028. return false;
  7029. }
  7030. var type = typeof value;
  7031. if (type == 'number' || type == 'symbol' || type == 'boolean' ||
  7032. value == null || isSymbol(value)) {
  7033. return true;
  7034. }
  7035. return reIsPlainProp.test(value) || !reIsDeepProp.test(value) ||
  7036. (object != null && value in Object(object));
  7037. }
  7038. /**
  7039. * Checks if `value` is suitable for use as unique object key.
  7040. *
  7041. * @private
  7042. * @param {*} value The value to check.
  7043. * @returns {boolean} Returns `true` if `value` is suitable, else `false`.
  7044. */
  7045. function isKeyable(value) {
  7046. var type = typeof value;
  7047. return (type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean')
  7048. ? (value !== '__proto__')
  7049. : (value === null);
  7050. }
  7051. /**
  7052. * Checks if `func` has a lazy counterpart.
  7053. *
  7054. * @private
  7055. * @param {Function} func The function to check.
  7056. * @returns {boolean} Returns `true` if `func` has a lazy counterpart,
  7057. * else `false`.
  7058. */
  7059. function isLaziable(func) {
  7060. var funcName = getFuncName(func),
  7061. other = lodash[funcName];
  7062. if (typeof other != 'function' || !(funcName in LazyWrapper.prototype)) {
  7063. return false;
  7064. }
  7065. if (func === other) {
  7066. return true;
  7067. }
  7068. var data = getData(other);
  7069. return !!data && func === data[0];
  7070. }
  7071. /**
  7072. * Checks if `func` has its source masked.
  7073. *
  7074. * @private
  7075. * @param {Function} func The function to check.
  7076. * @returns {boolean} Returns `true` if `func` is masked, else `false`.
  7077. */
  7078. function isMasked(func) {
  7079. return !!maskSrcKey && (maskSrcKey in func);
  7080. }
  7081. /**
  7082. * Checks if `func` is capable of being masked.
  7083. *
  7084. * @private
  7085. * @param {*} value The value to check.
  7086. * @returns {boolean} Returns `true` if `func` is maskable, else `false`.
  7087. */
  7088. var isMaskable = coreJsData ? isFunction : stubFalse;
  7089. /**
  7090. * Checks if `value` is likely a prototype object.
  7091. *
  7092. * @private
  7093. * @param {*} value The value to check.
  7094. * @returns {boolean} Returns `true` if `value` is a prototype, else `false`.
  7095. */
  7096. function isPrototype(value) {
  7097. var Ctor = value && value.constructor,
  7098. proto = (typeof Ctor == 'function' && Ctor.prototype) || objectProto;
  7099. return value === proto;
  7100. }
  7101. /**
  7102. * Checks if `value` is suitable for strict equality comparisons, i.e. `===`.
  7103. *
  7104. * @private
  7105. * @param {*} value The value to check.
  7106. * @returns {boolean} Returns `true` if `value` if suitable for strict
  7107. * equality comparisons, else `false`.
  7108. */
  7109. function isStrictComparable(value) {
  7110. return value === value && !isObject(value);
  7111. }
  7112. /**
  7113. * A specialized version of `matchesProperty` for source values suitable
  7114. * for strict equality comparisons, i.e. `===`.
  7115. *
  7116. * @private
  7117. * @param {string} key The key of the property to get.
  7118. * @param {*} srcValue The value to match.
  7119. * @returns {Function} Returns the new spec function.
  7120. */
  7121. function matchesStrictComparable(key, srcValue) {
  7122. return function(object) {
  7123. if (object == null) {
  7124. return false;
  7125. }
  7126. return object[key] === srcValue &&
  7127. (srcValue !== undefined || (key in Object(object)));
  7128. };
  7129. }
  7130. /**
  7131. * A specialized version of `_.memoize` which clears the memoized function's
  7132. * cache when it exceeds `MAX_MEMOIZE_SIZE`.
  7133. *
  7134. * @private
  7135. * @param {Function} func The function to have its output memoized.
  7136. * @returns {Function} Returns the new memoized function.
  7137. */
  7138. function memoizeCapped(func) {
  7139. var result = memoize(func, function(key) {
  7140. if (cache.size === MAX_MEMOIZE_SIZE) {
  7141. cache.clear();
  7142. }
  7143. return key;
  7144. });
  7145. var cache = result.cache;
  7146. return result;
  7147. }
  7148. /**
  7149. * Merges the function metadata of `source` into `data`.
  7150. *
  7151. * Merging metadata reduces the number of wrappers used to invoke a function.
  7152. * This is possible because methods like `_.bind`, `_.curry`, and `_.partial`
  7153. * may be applied regardless of execution order. Methods like `_.ary` and
  7154. * `_.rearg` modify function arguments, making the order in which they are
  7155. * executed important, preventing the merging of metadata. However, we make
  7156. * an exception for a safe combined case where curried functions have `_.ary`
  7157. * and or `_.rearg` applied.
  7158. *
  7159. * @private
  7160. * @param {Array} data The destination metadata.
  7161. * @param {Array} source The source metadata.
  7162. * @returns {Array} Returns `data`.
  7163. */
  7164. function mergeData(data, source) {
  7165. var bitmask = data[1],
  7166. srcBitmask = source[1],
  7167. newBitmask = bitmask | srcBitmask,
  7168. isCommon = newBitmask < (WRAP_BIND_FLAG | WRAP_BIND_KEY_FLAG | WRAP_ARY_FLAG);
  7169. var isCombo =
  7170. ((srcBitmask == WRAP_ARY_FLAG) && (bitmask == WRAP_CURRY_FLAG)) ||
  7171. ((srcBitmask == WRAP_ARY_FLAG) && (bitmask == WRAP_REARG_FLAG) && (data[7].length <= source[8])) ||
  7172. ((srcBitmask == (WRAP_ARY_FLAG | WRAP_REARG_FLAG)) && (source[7].length <= source[8]) && (bitmask == WRAP_CURRY_FLAG));
  7173. // Exit early if metadata can't be merged.
  7174. if (!(isCommon || isCombo)) {
  7175. return data;
  7176. }
  7177. // Use source `thisArg` if available.
  7178. if (srcBitmask & WRAP_BIND_FLAG) {
  7179. data[2] = source[2];
  7180. // Set when currying a bound function.
  7181. newBitmask |= bitmask & WRAP_BIND_FLAG ? 0 : WRAP_CURRY_BOUND_FLAG;
  7182. }
  7183. // Compose partial arguments.
  7184. var value = source[3];
  7185. if (value) {
  7186. var partials = data[3];
  7187. data[3] = partials ? composeArgs(partials, value, source[4]) : value;
  7188. data[4] = partials ? replaceHolders(data[3], PLACEHOLDER) : source[4];
  7189. }
  7190. // Compose partial right arguments.
  7191. value = source[5];
  7192. if (value) {
  7193. partials = data[5];
  7194. data[5] = partials ? composeArgsRight(partials, value, source[6]) : value;
  7195. data[6] = partials ? replaceHolders(data[5], PLACEHOLDER) : source[6];
  7196. }
  7197. // Use source `argPos` if available.
  7198. value = source[7];
  7199. if (value) {
  7200. data[7] = value;
  7201. }
  7202. // Use source `ary` if it's smaller.
  7203. if (srcBitmask & WRAP_ARY_FLAG) {
  7204. data[8] = data[8] == null ? source[8] : nativeMin(data[8], source[8]);
  7205. }
  7206. // Use source `arity` if one is not provided.
  7207. if (data[9] == null) {
  7208. data[9] = source[9];
  7209. }
  7210. // Use source `func` and merge bitmasks.
  7211. data[0] = source[0];
  7212. data[1] = newBitmask;
  7213. return data;
  7214. }
  7215. /**
  7216. * This function is like
  7217. * [`Object.keys`](http://ecma-international.org/ecma-262/7.0/#sec-object.keys)
  7218. * except that it includes inherited enumerable properties.
  7219. *
  7220. * @private
  7221. * @param {Object} object The object to query.
  7222. * @returns {Array} Returns the array of property names.
  7223. */
  7224. function nativeKeysIn(object) {
  7225. var result = [];
  7226. if (object != null) {
  7227. for (var key in Object(object)) {
  7228. result.push(key);
  7229. }
  7230. }
  7231. return result;
  7232. }
  7233. /**
  7234. * Converts `value` to a string using `Object.prototype.toString`.
  7235. *
  7236. * @private
  7237. * @param {*} value The value to convert.
  7238. * @returns {string} Returns the converted string.
  7239. */
  7240. function objectToString(value) {
  7241. return nativeObjectToString.call(value);
  7242. }
  7243. /**
  7244. * A specialized version of `baseRest` which transforms the rest array.
  7245. *
  7246. * @private
  7247. * @param {Function} func The function to apply a rest parameter to.
  7248. * @param {number} [start=func.length-1] The start position of the rest parameter.
  7249. * @param {Function} transform The rest array transform.
  7250. * @returns {Function} Returns the new function.
  7251. */
  7252. function overRest(func, start, transform) {
  7253. start = nativeMax(start === undefined ? (func.length - 1) : start, 0);
  7254. return function() {
  7255. var args = arguments,
  7256. index = -1,
  7257. length = nativeMax(args.length - start, 0),
  7258. array = Array(length);
  7259. while (++index < length) {
  7260. array[index] = args[start + index];
  7261. }
  7262. index = -1;
  7263. var otherArgs = Array(start + 1);
  7264. while (++index < start) {
  7265. otherArgs[index] = args[index];
  7266. }
  7267. otherArgs[start] = transform(array);
  7268. return apply(func, this, otherArgs);
  7269. };
  7270. }
  7271. /**
  7272. * Gets the parent value at `path` of `object`.
  7273. *
  7274. * @private
  7275. * @param {Object} object The object to query.
  7276. * @param {Array} path The path to get the parent value of.
  7277. * @returns {*} Returns the parent value.
  7278. */
  7279. function parent(object, path) {
  7280. return path.length < 2 ? object : baseGet(object, baseSlice(path, 0, -1));
  7281. }
  7282. /**
  7283. * Reorder `array` according to the specified indexes where the element at
  7284. * the first index is assigned as the first element, the element at
  7285. * the second index is assigned as the second element, and so on.
  7286. *
  7287. * @private
  7288. * @param {Array} array The array to reorder.
  7289. * @param {Array} indexes The arranged array indexes.
  7290. * @returns {Array} Returns `array`.
  7291. */
  7292. function reorder(array, indexes) {
  7293. var arrLength = array.length,
  7294. length = nativeMin(indexes.length, arrLength),
  7295. oldArray = copyArray(array);
  7296. while (length--) {
  7297. var index = indexes[length];
  7298. array[length] = isIndex(index, arrLength) ? oldArray[index] : undefined;
  7299. }
  7300. return array;
  7301. }
  7302. /**
  7303. * Sets metadata for `func`.
  7304. *
  7305. * **Note:** If this function becomes hot, i.e. is invoked a lot in a short
  7306. * period of time, it will trip its breaker and transition to an identity
  7307. * function to avoid garbage collection pauses in V8. See
  7308. * [V8 issue 2070](https://bugs.chromium.org/p/v8/issues/detail?id=2070)
  7309. * for more details.
  7310. *
  7311. * @private
  7312. * @param {Function} func The function to associate metadata with.
  7313. * @param {*} data The metadata.
  7314. * @returns {Function} Returns `func`.
  7315. */
  7316. var setData = shortOut(baseSetData);
  7317. /**
  7318. * A simple wrapper around the global [`setTimeout`](https://mdn.io/setTimeout).
  7319. *
  7320. * @private
  7321. * @param {Function} func The function to delay.
  7322. * @param {number} wait The number of milliseconds to delay invocation.
  7323. * @returns {number|Object} Returns the timer id or timeout object.
  7324. */
  7325. var setTimeout = ctxSetTimeout || function(func, wait) {
  7326. return root.setTimeout(func, wait);
  7327. };
  7328. /**
  7329. * Sets the `toString` method of `func` to return `string`.
  7330. *
  7331. * @private
  7332. * @param {Function} func The function to modify.
  7333. * @param {Function} string The `toString` result.
  7334. * @returns {Function} Returns `func`.
  7335. */
  7336. var setToString = shortOut(baseSetToString);
  7337. /**
  7338. * Sets the `toString` method of `wrapper` to mimic the source of `reference`
  7339. * with wrapper details in a comment at the top of the source body.
  7340. *
  7341. * @private
  7342. * @param {Function} wrapper The function to modify.
  7343. * @param {Function} reference The reference function.
  7344. * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
  7345. * @returns {Function} Returns `wrapper`.
  7346. */
  7347. function setWrapToString(wrapper, reference, bitmask) {
  7348. var source = (reference + '');
  7349. return setToString(wrapper, insertWrapDetails(source, updateWrapDetails(getWrapDetails(source), bitmask)));
  7350. }
  7351. /**
  7352. * Creates a function that'll short out and invoke `identity` instead
  7353. * of `func` when it's called `HOT_COUNT` or more times in `HOT_SPAN`
  7354. * milliseconds.
  7355. *
  7356. * @private
  7357. * @param {Function} func The function to restrict.
  7358. * @returns {Function} Returns the new shortable function.
  7359. */
  7360. function shortOut(func) {
  7361. var count = 0,
  7362. lastCalled = 0;
  7363. return function() {
  7364. var stamp = nativeNow(),
  7365. remaining = HOT_SPAN - (stamp - lastCalled);
  7366. lastCalled = stamp;
  7367. if (remaining > 0) {
  7368. if (++count >= HOT_COUNT) {
  7369. return arguments[0];
  7370. }
  7371. } else {
  7372. count = 0;
  7373. }
  7374. return func.apply(undefined, arguments);
  7375. };
  7376. }
  7377. /**
  7378. * A specialized version of `_.shuffle` which mutates and sets the size of `array`.
  7379. *
  7380. * @private
  7381. * @param {Array} array The array to shuffle.
  7382. * @param {number} [size=array.length] The size of `array`.
  7383. * @returns {Array} Returns `array`.
  7384. */
  7385. function shuffleSelf(array, size) {
  7386. var index = -1,
  7387. length = array.length,
  7388. lastIndex = length - 1;
  7389. size = size === undefined ? length : size;
  7390. while (++index < size) {
  7391. var rand = baseRandom(index, lastIndex),
  7392. value = array[rand];
  7393. array[rand] = array[index];
  7394. array[index] = value;
  7395. }
  7396. array.length = size;
  7397. return array;
  7398. }
  7399. /**
  7400. * Converts `string` to a property path array.
  7401. *
  7402. * @private
  7403. * @param {string} string The string to convert.
  7404. * @returns {Array} Returns the property path array.
  7405. */
  7406. var stringToPath = memoizeCapped(function(string) {
  7407. var result = [];
  7408. if (string.charCodeAt(0) === 46 /* . */) {
  7409. result.push('');
  7410. }
  7411. string.replace(rePropName, function(match, number, quote, subString) {
  7412. result.push(quote ? subString.replace(reEscapeChar, '$1') : (number || match));
  7413. });
  7414. return result;
  7415. });
  7416. /**
  7417. * Converts `value` to a string key if it's not a string or symbol.
  7418. *
  7419. * @private
  7420. * @param {*} value The value to inspect.
  7421. * @returns {string|symbol} Returns the key.
  7422. */
  7423. function toKey(value) {
  7424. if (typeof value == 'string' || isSymbol(value)) {
  7425. return value;
  7426. }
  7427. var result = (value + '');
  7428. return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
  7429. }
  7430. /**
  7431. * Converts `func` to its source code.
  7432. *
  7433. * @private
  7434. * @param {Function} func The function to convert.
  7435. * @returns {string} Returns the source code.
  7436. */
  7437. function toSource(func) {
  7438. if (func != null) {
  7439. try {
  7440. return funcToString.call(func);
  7441. } catch (e) {}
  7442. try {
  7443. return (func + '');
  7444. } catch (e) {}
  7445. }
  7446. return '';
  7447. }
  7448. /**
  7449. * Updates wrapper `details` based on `bitmask` flags.
  7450. *
  7451. * @private
  7452. * @returns {Array} details The details to modify.
  7453. * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
  7454. * @returns {Array} Returns `details`.
  7455. */
  7456. function updateWrapDetails(details, bitmask) {
  7457. arrayEach(wrapFlags, function(pair) {
  7458. var value = '_.' + pair[0];
  7459. if ((bitmask & pair[1]) && !arrayIncludes(details, value)) {
  7460. details.push(value);
  7461. }
  7462. });
  7463. return details.sort();
  7464. }
  7465. /**
  7466. * Creates a clone of `wrapper`.
  7467. *
  7468. * @private
  7469. * @param {Object} wrapper The wrapper to clone.
  7470. * @returns {Object} Returns the cloned wrapper.
  7471. */
  7472. function wrapperClone(wrapper) {
  7473. if (wrapper instanceof LazyWrapper) {
  7474. return wrapper.clone();
  7475. }
  7476. var result = new LodashWrapper(wrapper.__wrapped__, wrapper.__chain__);
  7477. result.__actions__ = copyArray(wrapper.__actions__);
  7478. result.__index__ = wrapper.__index__;
  7479. result.__values__ = wrapper.__values__;
  7480. return result;
  7481. }
  7482. /*------------------------------------------------------------------------*/
  7483. /**
  7484. * Creates an array of elements split into groups the length of `size`.
  7485. * If `array` can't be split evenly, the final chunk will be the remaining
  7486. * elements.
  7487. *
  7488. * @static
  7489. * @memberOf _
  7490. * @since 3.0.0
  7491. * @category Array
  7492. * @param {Array} array The array to process.
  7493. * @param {number} [size=1] The length of each chunk
  7494. * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
  7495. * @returns {Array} Returns the new array of chunks.
  7496. * @example
  7497. *
  7498. * _.chunk(['a', 'b', 'c', 'd'], 2);
  7499. * // => [['a', 'b'], ['c', 'd']]
  7500. *
  7501. * _.chunk(['a', 'b', 'c', 'd'], 3);
  7502. * // => [['a', 'b', 'c'], ['d']]
  7503. */
  7504. function chunk(array, size, guard) {
  7505. if ((guard ? isIterateeCall(array, size, guard) : size === undefined)) {
  7506. size = 1;
  7507. } else {
  7508. size = nativeMax(toInteger(size), 0);
  7509. }
  7510. var length = array == null ? 0 : array.length;
  7511. if (!length || size < 1) {
  7512. return [];
  7513. }
  7514. var index = 0,
  7515. resIndex = 0,
  7516. result = Array(nativeCeil(length / size));
  7517. while (index < length) {
  7518. result[resIndex++] = baseSlice(array, index, (index += size));
  7519. }
  7520. return result;
  7521. }
  7522. /**
  7523. * Creates an array with all falsey values removed. The values `false`, `null`,
  7524. * `0`, `""`, `undefined`, and `NaN` are falsey.
  7525. *
  7526. * @static
  7527. * @memberOf _
  7528. * @since 0.1.0
  7529. * @category Array
  7530. * @param {Array} array The array to compact.
  7531. * @returns {Array} Returns the new array of filtered values.
  7532. * @example
  7533. *
  7534. * _.compact([0, 1, false, 2, '', 3]);
  7535. * // => [1, 2, 3]
  7536. */
  7537. function compact(array) {
  7538. var index = -1,
  7539. length = array == null ? 0 : array.length,
  7540. resIndex = 0,
  7541. result = [];
  7542. while (++index < length) {
  7543. var value = array[index];
  7544. if (value) {
  7545. result[resIndex++] = value;
  7546. }
  7547. }
  7548. return result;
  7549. }
  7550. /**
  7551. * Creates a new array concatenating `array` with any additional arrays
  7552. * and/or values.
  7553. *
  7554. * @static
  7555. * @memberOf _
  7556. * @since 4.0.0
  7557. * @category Array
  7558. * @param {Array} array The array to concatenate.
  7559. * @param {...*} [values] The values to concatenate.
  7560. * @returns {Array} Returns the new concatenated array.
  7561. * @example
  7562. *
  7563. * var array = [1];
  7564. * var other = _.concat(array, 2, [3], [[4]]);
  7565. *
  7566. * console.log(other);
  7567. * // => [1, 2, 3, [4]]
  7568. *
  7569. * console.log(array);
  7570. * // => [1]
  7571. */
  7572. function concat() {
  7573. var length = arguments.length;
  7574. if (!length) {
  7575. return [];
  7576. }
  7577. var args = Array(length - 1),
  7578. array = arguments[0],
  7579. index = length;
  7580. while (index--) {
  7581. args[index - 1] = arguments[index];
  7582. }
  7583. return arrayPush(isArray(array) ? copyArray(array) : [array], baseFlatten(args, 1));
  7584. }
  7585. /**
  7586. * Creates an array of `array` values not included in the other given arrays
  7587. * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
  7588. * for equality comparisons. The order and references of result values are
  7589. * determined by the first array.
  7590. *
  7591. * **Note:** Unlike `_.pullAll`, this method returns a new array.
  7592. *
  7593. * @static
  7594. * @memberOf _
  7595. * @since 0.1.0
  7596. * @category Array
  7597. * @param {Array} array The array to inspect.
  7598. * @param {...Array} [values] The values to exclude.
  7599. * @returns {Array} Returns the new array of filtered values.
  7600. * @see _.without, _.xor
  7601. * @example
  7602. *
  7603. * _.difference([2, 1], [2, 3]);
  7604. * // => [1]
  7605. */
  7606. var difference = baseRest(function(array, values) {
  7607. return isArrayLikeObject(array)
  7608. ? baseDifference(array, baseFlatten(values, 1, isArrayLikeObject, true))
  7609. : [];
  7610. });
  7611. /**
  7612. * This method is like `_.difference` except that it accepts `iteratee` which
  7613. * is invoked for each element of `array` and `values` to generate the criterion
  7614. * by which they're compared. The order and references of result values are
  7615. * determined by the first array. The iteratee is invoked with one argument:
  7616. * (value).
  7617. *
  7618. * **Note:** Unlike `_.pullAllBy`, this method returns a new array.
  7619. *
  7620. * @static
  7621. * @memberOf _
  7622. * @since 4.0.0
  7623. * @category Array
  7624. * @param {Array} array The array to inspect.
  7625. * @param {...Array} [values] The values to exclude.
  7626. * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
  7627. * @returns {Array} Returns the new array of filtered values.
  7628. * @example
  7629. *
  7630. * _.differenceBy([2.1, 1.2], [2.3, 3.4], Math.floor);
  7631. * // => [1.2]
  7632. *
  7633. * // The `_.property` iteratee shorthand.
  7634. * _.differenceBy([{ 'x': 2 }, { 'x': 1 }], [{ 'x': 1 }], 'x');
  7635. * // => [{ 'x': 2 }]
  7636. */
  7637. var differenceBy = baseRest(function(array, values) {
  7638. var iteratee = last(values);
  7639. if (isArrayLikeObject(iteratee)) {
  7640. iteratee = undefined;
  7641. }
  7642. return isArrayLikeObject(array)
  7643. ? baseDifference(array, baseFlatten(values, 1, isArrayLikeObject, true), getIteratee(iteratee, 2))
  7644. : [];
  7645. });
  7646. /**
  7647. * This method is like `_.difference` except that it accepts `comparator`
  7648. * which is invoked to compare elements of `array` to `values`. The order and
  7649. * references of result values are determined by the first array. The comparator
  7650. * is invoked with two arguments: (arrVal, othVal).
  7651. *
  7652. * **Note:** Unlike `_.pullAllWith`, this method returns a new array.
  7653. *
  7654. * @static
  7655. * @memberOf _
  7656. * @since 4.0.0
  7657. * @category Array
  7658. * @param {Array} array The array to inspect.
  7659. * @param {...Array} [values] The values to exclude.
  7660. * @param {Function} [comparator] The comparator invoked per element.
  7661. * @returns {Array} Returns the new array of filtered values.
  7662. * @example
  7663. *
  7664. * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }];
  7665. *
  7666. * _.differenceWith(objects, [{ 'x': 1, 'y': 2 }], _.isEqual);
  7667. * // => [{ 'x': 2, 'y': 1 }]
  7668. */
  7669. var differenceWith = baseRest(function(array, values) {
  7670. var comparator = last(values);
  7671. if (isArrayLikeObject(comparator)) {
  7672. comparator = undefined;
  7673. }
  7674. return isArrayLikeObject(array)
  7675. ? baseDifference(array, baseFlatten(values, 1, isArrayLikeObject, true), undefined, comparator)
  7676. : [];
  7677. });
  7678. /**
  7679. * Creates a slice of `array` with `n` elements dropped from the beginning.
  7680. *
  7681. * @static
  7682. * @memberOf _
  7683. * @since 0.5.0
  7684. * @category Array
  7685. * @param {Array} array The array to query.
  7686. * @param {number} [n=1] The number of elements to drop.
  7687. * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
  7688. * @returns {Array} Returns the slice of `array`.
  7689. * @example
  7690. *
  7691. * _.drop([1, 2, 3]);
  7692. * // => [2, 3]
  7693. *
  7694. * _.drop([1, 2, 3], 2);
  7695. * // => [3]
  7696. *
  7697. * _.drop([1, 2, 3], 5);
  7698. * // => []
  7699. *
  7700. * _.drop([1, 2, 3], 0);
  7701. * // => [1, 2, 3]
  7702. */
  7703. function drop(array, n, guard) {
  7704. var length = array == null ? 0 : array.length;
  7705. if (!length) {
  7706. return [];
  7707. }
  7708. n = (guard || n === undefined) ? 1 : toInteger(n);
  7709. return baseSlice(array, n < 0 ? 0 : n, length);
  7710. }
  7711. /**
  7712. * Creates a slice of `array` with `n` elements dropped from the end.
  7713. *
  7714. * @static
  7715. * @memberOf _
  7716. * @since 3.0.0
  7717. * @category Array
  7718. * @param {Array} array The array to query.
  7719. * @param {number} [n=1] The number of elements to drop.
  7720. * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
  7721. * @returns {Array} Returns the slice of `array`.
  7722. * @example
  7723. *
  7724. * _.dropRight([1, 2, 3]);
  7725. * // => [1, 2]
  7726. *
  7727. * _.dropRight([1, 2, 3], 2);
  7728. * // => [1]
  7729. *
  7730. * _.dropRight([1, 2, 3], 5);
  7731. * // => []
  7732. *
  7733. * _.dropRight([1, 2, 3], 0);
  7734. * // => [1, 2, 3]
  7735. */
  7736. function dropRight(array, n, guard) {
  7737. var length = array == null ? 0 : array.length;
  7738. if (!length) {
  7739. return [];
  7740. }
  7741. n = (guard || n === undefined) ? 1 : toInteger(n);
  7742. n = length - n;
  7743. return baseSlice(array, 0, n < 0 ? 0 : n);
  7744. }
  7745. /**
  7746. * Creates a slice of `array` excluding elements dropped from the end.
  7747. * Elements are dropped until `predicate` returns falsey. The predicate is
  7748. * invoked with three arguments: (value, index, array).
  7749. *
  7750. * @static
  7751. * @memberOf _
  7752. * @since 3.0.0
  7753. * @category Array
  7754. * @param {Array} array The array to query.
  7755. * @param {Function} [predicate=_.identity] The function invoked per iteration.
  7756. * @returns {Array} Returns the slice of `array`.
  7757. * @example
  7758. *
  7759. * var users = [
  7760. * { 'user': 'barney', 'active': true },
  7761. * { 'user': 'fred', 'active': false },
  7762. * { 'user': 'pebbles', 'active': false }
  7763. * ];
  7764. *
  7765. * _.dropRightWhile(users, function(o) { return !o.active; });
  7766. * // => objects for ['barney']
  7767. *
  7768. * // The `_.matches` iteratee shorthand.
  7769. * _.dropRightWhile(users, { 'user': 'pebbles', 'active': false });
  7770. * // => objects for ['barney', 'fred']
  7771. *
  7772. * // The `_.matchesProperty` iteratee shorthand.
  7773. * _.dropRightWhile(users, ['active', false]);
  7774. * // => objects for ['barney']
  7775. *
  7776. * // The `_.property` iteratee shorthand.
  7777. * _.dropRightWhile(users, 'active');
  7778. * // => objects for ['barney', 'fred', 'pebbles']
  7779. */
  7780. function dropRightWhile(array, predicate) {
  7781. return (array && array.length)
  7782. ? baseWhile(array, getIteratee(predicate, 3), true, true)
  7783. : [];
  7784. }
  7785. /**
  7786. * Creates a slice of `array` excluding elements dropped from the beginning.
  7787. * Elements are dropped until `predicate` returns falsey. The predicate is
  7788. * invoked with three arguments: (value, index, array).
  7789. *
  7790. * @static
  7791. * @memberOf _
  7792. * @since 3.0.0
  7793. * @category Array
  7794. * @param {Array} array The array to query.
  7795. * @param {Function} [predicate=_.identity] The function invoked per iteration.
  7796. * @returns {Array} Returns the slice of `array`.
  7797. * @example
  7798. *
  7799. * var users = [
  7800. * { 'user': 'barney', 'active': false },
  7801. * { 'user': 'fred', 'active': false },
  7802. * { 'user': 'pebbles', 'active': true }
  7803. * ];
  7804. *
  7805. * _.dropWhile(users, function(o) { return !o.active; });
  7806. * // => objects for ['pebbles']
  7807. *
  7808. * // The `_.matches` iteratee shorthand.
  7809. * _.dropWhile(users, { 'user': 'barney', 'active': false });
  7810. * // => objects for ['fred', 'pebbles']
  7811. *
  7812. * // The `_.matchesProperty` iteratee shorthand.
  7813. * _.dropWhile(users, ['active', false]);
  7814. * // => objects for ['pebbles']
  7815. *
  7816. * // The `_.property` iteratee shorthand.
  7817. * _.dropWhile(users, 'active');
  7818. * // => objects for ['barney', 'fred', 'pebbles']
  7819. */
  7820. function dropWhile(array, predicate) {
  7821. return (array && array.length)
  7822. ? baseWhile(array, getIteratee(predicate, 3), true)
  7823. : [];
  7824. }
  7825. /**
  7826. * Fills elements of `array` with `value` from `start` up to, but not
  7827. * including, `end`.
  7828. *
  7829. * **Note:** This method mutates `array`.
  7830. *
  7831. * @static
  7832. * @memberOf _
  7833. * @since 3.2.0
  7834. * @category Array
  7835. * @param {Array} array The array to fill.
  7836. * @param {*} value The value to fill `array` with.
  7837. * @param {number} [start=0] The start position.
  7838. * @param {number} [end=array.length] The end position.
  7839. * @returns {Array} Returns `array`.
  7840. * @example
  7841. *
  7842. * var array = [1, 2, 3];
  7843. *
  7844. * _.fill(array, 'a');
  7845. * console.log(array);
  7846. * // => ['a', 'a', 'a']
  7847. *
  7848. * _.fill(Array(3), 2);
  7849. * // => [2, 2, 2]
  7850. *
  7851. * _.fill([4, 6, 8, 10], '*', 1, 3);
  7852. * // => [4, '*', '*', 10]
  7853. */
  7854. function fill(array, value, start, end) {
  7855. var length = array == null ? 0 : array.length;
  7856. if (!length) {
  7857. return [];
  7858. }
  7859. if (start && typeof start != 'number' && isIterateeCall(array, value, start)) {
  7860. start = 0;
  7861. end = length;
  7862. }
  7863. return baseFill(array, value, start, end);
  7864. }
  7865. /**
  7866. * This method is like `_.find` except that it returns the index of the first
  7867. * element `predicate` returns truthy for instead of the element itself.
  7868. *
  7869. * @static
  7870. * @memberOf _
  7871. * @since 1.1.0
  7872. * @category Array
  7873. * @param {Array} array The array to inspect.
  7874. * @param {Function} [predicate=_.identity] The function invoked per iteration.
  7875. * @param {number} [fromIndex=0] The index to search from.
  7876. * @returns {number} Returns the index of the found element, else `-1`.
  7877. * @example
  7878. *
  7879. * var users = [
  7880. * { 'user': 'barney', 'active': false },
  7881. * { 'user': 'fred', 'active': false },
  7882. * { 'user': 'pebbles', 'active': true }
  7883. * ];
  7884. *
  7885. * _.findIndex(users, function(o) { return o.user == 'barney'; });
  7886. * // => 0
  7887. *
  7888. * // The `_.matches` iteratee shorthand.
  7889. * _.findIndex(users, { 'user': 'fred', 'active': false });
  7890. * // => 1
  7891. *
  7892. * // The `_.matchesProperty` iteratee shorthand.
  7893. * _.findIndex(users, ['active', false]);
  7894. * // => 0
  7895. *
  7896. * // The `_.property` iteratee shorthand.
  7897. * _.findIndex(users, 'active');
  7898. * // => 2
  7899. */
  7900. function findIndex(array, predicate, fromIndex) {
  7901. var length = array == null ? 0 : array.length;
  7902. if (!length) {
  7903. return -1;
  7904. }
  7905. var index = fromIndex == null ? 0 : toInteger(fromIndex);
  7906. if (index < 0) {
  7907. index = nativeMax(length + index, 0);
  7908. }
  7909. return baseFindIndex(array, getIteratee(predicate, 3), index);
  7910. }
  7911. /**
  7912. * This method is like `_.findIndex` except that it iterates over elements
  7913. * of `collection` from right to left.
  7914. *
  7915. * @static
  7916. * @memberOf _
  7917. * @since 2.0.0
  7918. * @category Array
  7919. * @param {Array} array The array to inspect.
  7920. * @param {Function} [predicate=_.identity] The function invoked per iteration.
  7921. * @param {number} [fromIndex=array.length-1] The index to search from.
  7922. * @returns {number} Returns the index of the found element, else `-1`.
  7923. * @example
  7924. *
  7925. * var users = [
  7926. * { 'user': 'barney', 'active': true },
  7927. * { 'user': 'fred', 'active': false },
  7928. * { 'user': 'pebbles', 'active': false }
  7929. * ];
  7930. *
  7931. * _.findLastIndex(users, function(o) { return o.user == 'pebbles'; });
  7932. * // => 2
  7933. *
  7934. * // The `_.matches` iteratee shorthand.
  7935. * _.findLastIndex(users, { 'user': 'barney', 'active': true });
  7936. * // => 0
  7937. *
  7938. * // The `_.matchesProperty` iteratee shorthand.
  7939. * _.findLastIndex(users, ['active', false]);
  7940. * // => 2
  7941. *
  7942. * // The `_.property` iteratee shorthand.
  7943. * _.findLastIndex(users, 'active');
  7944. * // => 0
  7945. */
  7946. function findLastIndex(array, predicate, fromIndex) {
  7947. var length = array == null ? 0 : array.length;
  7948. if (!length) {
  7949. return -1;
  7950. }
  7951. var index = length - 1;
  7952. if (fromIndex !== undefined) {
  7953. index = toInteger(fromIndex);
  7954. index = fromIndex < 0
  7955. ? nativeMax(length + index, 0)
  7956. : nativeMin(index, length - 1);
  7957. }
  7958. return baseFindIndex(array, getIteratee(predicate, 3), index, true);
  7959. }
  7960. /**
  7961. * Flattens `array` a single level deep.
  7962. *
  7963. * @static
  7964. * @memberOf _
  7965. * @since 0.1.0
  7966. * @category Array
  7967. * @param {Array} array The array to flatten.
  7968. * @returns {Array} Returns the new flattened array.
  7969. * @example
  7970. *
  7971. * _.flatten([1, [2, [3, [4]], 5]]);
  7972. * // => [1, 2, [3, [4]], 5]
  7973. */
  7974. function flatten(array) {
  7975. var length = array == null ? 0 : array.length;
  7976. return length ? baseFlatten(array, 1) : [];
  7977. }
  7978. /**
  7979. * Recursively flattens `array`.
  7980. *
  7981. * @static
  7982. * @memberOf _
  7983. * @since 3.0.0
  7984. * @category Array
  7985. * @param {Array} array The array to flatten.
  7986. * @returns {Array} Returns the new flattened array.
  7987. * @example
  7988. *
  7989. * _.flattenDeep([1, [2, [3, [4]], 5]]);
  7990. * // => [1, 2, 3, 4, 5]
  7991. */
  7992. function flattenDeep(array) {
  7993. var length = array == null ? 0 : array.length;
  7994. return length ? baseFlatten(array, INFINITY) : [];
  7995. }
  7996. /**
  7997. * Recursively flatten `array` up to `depth` times.
  7998. *
  7999. * @static
  8000. * @memberOf _
  8001. * @since 4.4.0
  8002. * @category Array
  8003. * @param {Array} array The array to flatten.
  8004. * @param {number} [depth=1] The maximum recursion depth.
  8005. * @returns {Array} Returns the new flattened array.
  8006. * @example
  8007. *
  8008. * var array = [1, [2, [3, [4]], 5]];
  8009. *
  8010. * _.flattenDepth(array, 1);
  8011. * // => [1, 2, [3, [4]], 5]
  8012. *
  8013. * _.flattenDepth(array, 2);
  8014. * // => [1, 2, 3, [4], 5]
  8015. */
  8016. function flattenDepth(array, depth) {
  8017. var length = array == null ? 0 : array.length;
  8018. if (!length) {
  8019. return [];
  8020. }
  8021. depth = depth === undefined ? 1 : toInteger(depth);
  8022. return baseFlatten(array, depth);
  8023. }
  8024. /**
  8025. * The inverse of `_.toPairs`; this method returns an object composed
  8026. * from key-value `pairs`.
  8027. *
  8028. * @static
  8029. * @memberOf _
  8030. * @since 4.0.0
  8031. * @category Array
  8032. * @param {Array} pairs The key-value pairs.
  8033. * @returns {Object} Returns the new object.
  8034. * @example
  8035. *
  8036. * _.fromPairs([['a', 1], ['b', 2]]);
  8037. * // => { 'a': 1, 'b': 2 }
  8038. */
  8039. function fromPairs(pairs) {
  8040. var index = -1,
  8041. length = pairs == null ? 0 : pairs.length,
  8042. result = {};
  8043. while (++index < length) {
  8044. var pair = pairs[index];
  8045. result[pair[0]] = pair[1];
  8046. }
  8047. return result;
  8048. }
  8049. /**
  8050. * Gets the first element of `array`.
  8051. *
  8052. * @static
  8053. * @memberOf _
  8054. * @since 0.1.0
  8055. * @alias first
  8056. * @category Array
  8057. * @param {Array} array The array to query.
  8058. * @returns {*} Returns the first element of `array`.
  8059. * @example
  8060. *
  8061. * _.head([1, 2, 3]);
  8062. * // => 1
  8063. *
  8064. * _.head([]);
  8065. * // => undefined
  8066. */
  8067. function head(array) {
  8068. return (array && array.length) ? array[0] : undefined;
  8069. }
  8070. /**
  8071. * Gets the index at which the first occurrence of `value` is found in `array`
  8072. * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
  8073. * for equality comparisons. If `fromIndex` is negative, it's used as the
  8074. * offset from the end of `array`.
  8075. *
  8076. * @static
  8077. * @memberOf _
  8078. * @since 0.1.0
  8079. * @category Array
  8080. * @param {Array} array The array to inspect.
  8081. * @param {*} value The value to search for.
  8082. * @param {number} [fromIndex=0] The index to search from.
  8083. * @returns {number} Returns the index of the matched value, else `-1`.
  8084. * @example
  8085. *
  8086. * _.indexOf([1, 2, 1, 2], 2);
  8087. * // => 1
  8088. *
  8089. * // Search from the `fromIndex`.
  8090. * _.indexOf([1, 2, 1, 2], 2, 2);
  8091. * // => 3
  8092. */
  8093. function indexOf(array, value, fromIndex) {
  8094. var length = array == null ? 0 : array.length;
  8095. if (!length) {
  8096. return -1;
  8097. }
  8098. var index = fromIndex == null ? 0 : toInteger(fromIndex);
  8099. if (index < 0) {
  8100. index = nativeMax(length + index, 0);
  8101. }
  8102. return baseIndexOf(array, value, index);
  8103. }
  8104. /**
  8105. * Gets all but the last element of `array`.
  8106. *
  8107. * @static
  8108. * @memberOf _
  8109. * @since 0.1.0
  8110. * @category Array
  8111. * @param {Array} array The array to query.
  8112. * @returns {Array} Returns the slice of `array`.
  8113. * @example
  8114. *
  8115. * _.initial([1, 2, 3]);
  8116. * // => [1, 2]
  8117. */
  8118. function initial(array) {
  8119. var length = array == null ? 0 : array.length;
  8120. return length ? baseSlice(array, 0, -1) : [];
  8121. }
  8122. /**
  8123. * Creates an array of unique values that are included in all given arrays
  8124. * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
  8125. * for equality comparisons. The order and references of result values are
  8126. * determined by the first array.
  8127. *
  8128. * @static
  8129. * @memberOf _
  8130. * @since 0.1.0
  8131. * @category Array
  8132. * @param {...Array} [arrays] The arrays to inspect.
  8133. * @returns {Array} Returns the new array of intersecting values.
  8134. * @example
  8135. *
  8136. * _.intersection([2, 1], [2, 3]);
  8137. * // => [2]
  8138. */
  8139. var intersection = baseRest(function(arrays) {
  8140. var mapped = arrayMap(arrays, castArrayLikeObject);
  8141. return (mapped.length && mapped[0] === arrays[0])
  8142. ? baseIntersection(mapped)
  8143. : [];
  8144. });
  8145. /**
  8146. * This method is like `_.intersection` except that it accepts `iteratee`
  8147. * which is invoked for each element of each `arrays` to generate the criterion
  8148. * by which they're compared. The order and references of result values are
  8149. * determined by the first array. The iteratee is invoked with one argument:
  8150. * (value).
  8151. *
  8152. * @static
  8153. * @memberOf _
  8154. * @since 4.0.0
  8155. * @category Array
  8156. * @param {...Array} [arrays] The arrays to inspect.
  8157. * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
  8158. * @returns {Array} Returns the new array of intersecting values.
  8159. * @example
  8160. *
  8161. * _.intersectionBy([2.1, 1.2], [2.3, 3.4], Math.floor);
  8162. * // => [2.1]
  8163. *
  8164. * // The `_.property` iteratee shorthand.
  8165. * _.intersectionBy([{ 'x': 1 }], [{ 'x': 2 }, { 'x': 1 }], 'x');
  8166. * // => [{ 'x': 1 }]
  8167. */
  8168. var intersectionBy = baseRest(function(arrays) {
  8169. var iteratee = last(arrays),
  8170. mapped = arrayMap(arrays, castArrayLikeObject);
  8171. if (iteratee === last(mapped)) {
  8172. iteratee = undefined;
  8173. } else {
  8174. mapped.pop();
  8175. }
  8176. return (mapped.length && mapped[0] === arrays[0])
  8177. ? baseIntersection(mapped, getIteratee(iteratee, 2))
  8178. : [];
  8179. });
  8180. /**
  8181. * This method is like `_.intersection` except that it accepts `comparator`
  8182. * which is invoked to compare elements of `arrays`. The order and references
  8183. * of result values are determined by the first array. The comparator is
  8184. * invoked with two arguments: (arrVal, othVal).
  8185. *
  8186. * @static
  8187. * @memberOf _
  8188. * @since 4.0.0
  8189. * @category Array
  8190. * @param {...Array} [arrays] The arrays to inspect.
  8191. * @param {Function} [comparator] The comparator invoked per element.
  8192. * @returns {Array} Returns the new array of intersecting values.
  8193. * @example
  8194. *
  8195. * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }];
  8196. * var others = [{ 'x': 1, 'y': 1 }, { 'x': 1, 'y': 2 }];
  8197. *
  8198. * _.intersectionWith(objects, others, _.isEqual);
  8199. * // => [{ 'x': 1, 'y': 2 }]
  8200. */
  8201. var intersectionWith = baseRest(function(arrays) {
  8202. var comparator = last(arrays),
  8203. mapped = arrayMap(arrays, castArrayLikeObject);
  8204. comparator = typeof comparator == 'function' ? comparator : undefined;
  8205. if (comparator) {
  8206. mapped.pop();
  8207. }
  8208. return (mapped.length && mapped[0] === arrays[0])
  8209. ? baseIntersection(mapped, undefined, comparator)
  8210. : [];
  8211. });
  8212. /**
  8213. * Converts all elements in `array` into a string separated by `separator`.
  8214. *
  8215. * @static
  8216. * @memberOf _
  8217. * @since 4.0.0
  8218. * @category Array
  8219. * @param {Array} array The array to convert.
  8220. * @param {string} [separator=','] The element separator.
  8221. * @returns {string} Returns the joined string.
  8222. * @example
  8223. *
  8224. * _.join(['a', 'b', 'c'], '~');
  8225. * // => 'a~b~c'
  8226. */
  8227. function join(array, separator) {
  8228. return array == null ? '' : nativeJoin.call(array, separator);
  8229. }
  8230. /**
  8231. * Gets the last element of `array`.
  8232. *
  8233. * @static
  8234. * @memberOf _
  8235. * @since 0.1.0
  8236. * @category Array
  8237. * @param {Array} array The array to query.
  8238. * @returns {*} Returns the last element of `array`.
  8239. * @example
  8240. *
  8241. * _.last([1, 2, 3]);
  8242. * // => 3
  8243. */
  8244. function last(array) {
  8245. var length = array == null ? 0 : array.length;
  8246. return length ? array[length - 1] : undefined;
  8247. }
  8248. /**
  8249. * This method is like `_.indexOf` except that it iterates over elements of
  8250. * `array` from right to left.
  8251. *
  8252. * @static
  8253. * @memberOf _
  8254. * @since 0.1.0
  8255. * @category Array
  8256. * @param {Array} array The array to inspect.
  8257. * @param {*} value The value to search for.
  8258. * @param {number} [fromIndex=array.length-1] The index to search from.
  8259. * @returns {number} Returns the index of the matched value, else `-1`.
  8260. * @example
  8261. *
  8262. * _.lastIndexOf([1, 2, 1, 2], 2);
  8263. * // => 3
  8264. *
  8265. * // Search from the `fromIndex`.
  8266. * _.lastIndexOf([1, 2, 1, 2], 2, 2);
  8267. * // => 1
  8268. */
  8269. function lastIndexOf(array, value, fromIndex) {
  8270. var length = array == null ? 0 : array.length;
  8271. if (!length) {
  8272. return -1;
  8273. }
  8274. var index = length;
  8275. if (fromIndex !== undefined) {
  8276. index = toInteger(fromIndex);
  8277. index = index < 0 ? nativeMax(length + index, 0) : nativeMin(index, length - 1);
  8278. }
  8279. return value === value
  8280. ? strictLastIndexOf(array, value, index)
  8281. : baseFindIndex(array, baseIsNaN, index, true);
  8282. }
  8283. /**
  8284. * Gets the element at index `n` of `array`. If `n` is negative, the nth
  8285. * element from the end is returned.
  8286. *
  8287. * @static
  8288. * @memberOf _
  8289. * @since 4.11.0
  8290. * @category Array
  8291. * @param {Array} array The array to query.
  8292. * @param {number} [n=0] The index of the element to return.
  8293. * @returns {*} Returns the nth element of `array`.
  8294. * @example
  8295. *
  8296. * var array = ['a', 'b', 'c', 'd'];
  8297. *
  8298. * _.nth(array, 1);
  8299. * // => 'b'
  8300. *
  8301. * _.nth(array, -2);
  8302. * // => 'c';
  8303. */
  8304. function nth(array, n) {
  8305. return (array && array.length) ? baseNth(array, toInteger(n)) : undefined;
  8306. }
  8307. /**
  8308. * Removes all given values from `array` using
  8309. * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
  8310. * for equality comparisons.
  8311. *
  8312. * **Note:** Unlike `_.without`, this method mutates `array`. Use `_.remove`
  8313. * to remove elements from an array by predicate.
  8314. *
  8315. * @static
  8316. * @memberOf _
  8317. * @since 2.0.0
  8318. * @category Array
  8319. * @param {Array} array The array to modify.
  8320. * @param {...*} [values] The values to remove.
  8321. * @returns {Array} Returns `array`.
  8322. * @example
  8323. *
  8324. * var array = ['a', 'b', 'c', 'a', 'b', 'c'];
  8325. *
  8326. * _.pull(array, 'a', 'c');
  8327. * console.log(array);
  8328. * // => ['b', 'b']
  8329. */
  8330. var pull = baseRest(pullAll);
  8331. /**
  8332. * This method is like `_.pull` except that it accepts an array of values to remove.
  8333. *
  8334. * **Note:** Unlike `_.difference`, this method mutates `array`.
  8335. *
  8336. * @static
  8337. * @memberOf _
  8338. * @since 4.0.0
  8339. * @category Array
  8340. * @param {Array} array The array to modify.
  8341. * @param {Array} values The values to remove.
  8342. * @returns {Array} Returns `array`.
  8343. * @example
  8344. *
  8345. * var array = ['a', 'b', 'c', 'a', 'b', 'c'];
  8346. *
  8347. * _.pullAll(array, ['a', 'c']);
  8348. * console.log(array);
  8349. * // => ['b', 'b']
  8350. */
  8351. function pullAll(array, values) {
  8352. return (array && array.length && values && values.length)
  8353. ? basePullAll(array, values)
  8354. : array;
  8355. }
  8356. /**
  8357. * This method is like `_.pullAll` except that it accepts `iteratee` which is
  8358. * invoked for each element of `array` and `values` to generate the criterion
  8359. * by which they're compared. The iteratee is invoked with one argument: (value).
  8360. *
  8361. * **Note:** Unlike `_.differenceBy`, this method mutates `array`.
  8362. *
  8363. * @static
  8364. * @memberOf _
  8365. * @since 4.0.0
  8366. * @category Array
  8367. * @param {Array} array The array to modify.
  8368. * @param {Array} values The values to remove.
  8369. * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
  8370. * @returns {Array} Returns `array`.
  8371. * @example
  8372. *
  8373. * var array = [{ 'x': 1 }, { 'x': 2 }, { 'x': 3 }, { 'x': 1 }];
  8374. *
  8375. * _.pullAllBy(array, [{ 'x': 1 }, { 'x': 3 }], 'x');
  8376. * console.log(array);
  8377. * // => [{ 'x': 2 }]
  8378. */
  8379. function pullAllBy(array, values, iteratee) {
  8380. return (array && array.length && values && values.length)
  8381. ? basePullAll(array, values, getIteratee(iteratee, 2))
  8382. : array;
  8383. }
  8384. /**
  8385. * This method is like `_.pullAll` except that it accepts `comparator` which
  8386. * is invoked to compare elements of `array` to `values`. The comparator is
  8387. * invoked with two arguments: (arrVal, othVal).
  8388. *
  8389. * **Note:** Unlike `_.differenceWith`, this method mutates `array`.
  8390. *
  8391. * @static
  8392. * @memberOf _
  8393. * @since 4.6.0
  8394. * @category Array
  8395. * @param {Array} array The array to modify.
  8396. * @param {Array} values The values to remove.
  8397. * @param {Function} [comparator] The comparator invoked per element.
  8398. * @returns {Array} Returns `array`.
  8399. * @example
  8400. *
  8401. * var array = [{ 'x': 1, 'y': 2 }, { 'x': 3, 'y': 4 }, { 'x': 5, 'y': 6 }];
  8402. *
  8403. * _.pullAllWith(array, [{ 'x': 3, 'y': 4 }], _.isEqual);
  8404. * console.log(array);
  8405. * // => [{ 'x': 1, 'y': 2 }, { 'x': 5, 'y': 6 }]
  8406. */
  8407. function pullAllWith(array, values, comparator) {
  8408. return (array && array.length && values && values.length)
  8409. ? basePullAll(array, values, undefined, comparator)
  8410. : array;
  8411. }
  8412. /**
  8413. * Removes elements from `array` corresponding to `indexes` and returns an
  8414. * array of removed elements.
  8415. *
  8416. * **Note:** Unlike `_.at`, this method mutates `array`.
  8417. *
  8418. * @static
  8419. * @memberOf _
  8420. * @since 3.0.0
  8421. * @category Array
  8422. * @param {Array} array The array to modify.
  8423. * @param {...(number|number[])} [indexes] The indexes of elements to remove.
  8424. * @returns {Array} Returns the new array of removed elements.
  8425. * @example
  8426. *
  8427. * var array = ['a', 'b', 'c', 'd'];
  8428. * var pulled = _.pullAt(array, [1, 3]);
  8429. *
  8430. * console.log(array);
  8431. * // => ['a', 'c']
  8432. *
  8433. * console.log(pulled);
  8434. * // => ['b', 'd']
  8435. */
  8436. var pullAt = flatRest(function(array, indexes) {
  8437. var length = array == null ? 0 : array.length,
  8438. result = baseAt(array, indexes);
  8439. basePullAt(array, arrayMap(indexes, function(index) {
  8440. return isIndex(index, length) ? +index : index;
  8441. }).sort(compareAscending));
  8442. return result;
  8443. });
  8444. /**
  8445. * Removes all elements from `array` that `predicate` returns truthy for
  8446. * and returns an array of the removed elements. The predicate is invoked
  8447. * with three arguments: (value, index, array).
  8448. *
  8449. * **Note:** Unlike `_.filter`, this method mutates `array`. Use `_.pull`
  8450. * to pull elements from an array by value.
  8451. *
  8452. * @static
  8453. * @memberOf _
  8454. * @since 2.0.0
  8455. * @category Array
  8456. * @param {Array} array The array to modify.
  8457. * @param {Function} [predicate=_.identity] The function invoked per iteration.
  8458. * @returns {Array} Returns the new array of removed elements.
  8459. * @example
  8460. *
  8461. * var array = [1, 2, 3, 4];
  8462. * var evens = _.remove(array, function(n) {
  8463. * return n % 2 == 0;
  8464. * });
  8465. *
  8466. * console.log(array);
  8467. * // => [1, 3]
  8468. *
  8469. * console.log(evens);
  8470. * // => [2, 4]
  8471. */
  8472. function remove(array, predicate) {
  8473. var result = [];
  8474. if (!(array && array.length)) {
  8475. return result;
  8476. }
  8477. var index = -1,
  8478. indexes = [],
  8479. length = array.length;
  8480. predicate = getIteratee(predicate, 3);
  8481. while (++index < length) {
  8482. var value = array[index];
  8483. if (predicate(value, index, array)) {
  8484. result.push(value);
  8485. indexes.push(index);
  8486. }
  8487. }
  8488. basePullAt(array, indexes);
  8489. return result;
  8490. }
  8491. /**
  8492. * Reverses `array` so that the first element becomes the last, the second
  8493. * element becomes the second to last, and so on.
  8494. *
  8495. * **Note:** This method mutates `array` and is based on
  8496. * [`Array#reverse`](https://mdn.io/Array/reverse).
  8497. *
  8498. * @static
  8499. * @memberOf _
  8500. * @since 4.0.0
  8501. * @category Array
  8502. * @param {Array} array The array to modify.
  8503. * @returns {Array} Returns `array`.
  8504. * @example
  8505. *
  8506. * var array = [1, 2, 3];
  8507. *
  8508. * _.reverse(array);
  8509. * // => [3, 2, 1]
  8510. *
  8511. * console.log(array);
  8512. * // => [3, 2, 1]
  8513. */
  8514. function reverse(array) {
  8515. return array == null ? array : nativeReverse.call(array);
  8516. }
  8517. /**
  8518. * Creates a slice of `array` from `start` up to, but not including, `end`.
  8519. *
  8520. * **Note:** This method is used instead of
  8521. * [`Array#slice`](https://mdn.io/Array/slice) to ensure dense arrays are
  8522. * returned.
  8523. *
  8524. * @static
  8525. * @memberOf _
  8526. * @since 3.0.0
  8527. * @category Array
  8528. * @param {Array} array The array to slice.
  8529. * @param {number} [start=0] The start position.
  8530. * @param {number} [end=array.length] The end position.
  8531. * @returns {Array} Returns the slice of `array`.
  8532. */
  8533. function slice(array, start, end) {
  8534. var length = array == null ? 0 : array.length;
  8535. if (!length) {
  8536. return [];
  8537. }
  8538. if (end && typeof end != 'number' && isIterateeCall(array, start, end)) {
  8539. start = 0;
  8540. end = length;
  8541. }
  8542. else {
  8543. start = start == null ? 0 : toInteger(start);
  8544. end = end === undefined ? length : toInteger(end);
  8545. }
  8546. return baseSlice(array, start, end);
  8547. }
  8548. /**
  8549. * Uses a binary search to determine the lowest index at which `value`
  8550. * should be inserted into `array` in order to maintain its sort order.
  8551. *
  8552. * @static
  8553. * @memberOf _
  8554. * @since 0.1.0
  8555. * @category Array
  8556. * @param {Array} array The sorted array to inspect.
  8557. * @param {*} value The value to evaluate.
  8558. * @returns {number} Returns the index at which `value` should be inserted
  8559. * into `array`.
  8560. * @example
  8561. *
  8562. * _.sortedIndex([30, 50], 40);
  8563. * // => 1
  8564. */
  8565. function sortedIndex(array, value) {
  8566. return baseSortedIndex(array, value);
  8567. }
  8568. /**
  8569. * This method is like `_.sortedIndex` except that it accepts `iteratee`
  8570. * which is invoked for `value` and each element of `array` to compute their
  8571. * sort ranking. The iteratee is invoked with one argument: (value).
  8572. *
  8573. * @static
  8574. * @memberOf _
  8575. * @since 4.0.0
  8576. * @category Array
  8577. * @param {Array} array The sorted array to inspect.
  8578. * @param {*} value The value to evaluate.
  8579. * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
  8580. * @returns {number} Returns the index at which `value` should be inserted
  8581. * into `array`.
  8582. * @example
  8583. *
  8584. * var objects = [{ 'x': 4 }, { 'x': 5 }];
  8585. *
  8586. * _.sortedIndexBy(objects, { 'x': 4 }, function(o) { return o.x; });
  8587. * // => 0
  8588. *
  8589. * // The `_.property` iteratee shorthand.
  8590. * _.sortedIndexBy(objects, { 'x': 4 }, 'x');
  8591. * // => 0
  8592. */
  8593. function sortedIndexBy(array, value, iteratee) {
  8594. return baseSortedIndexBy(array, value, getIteratee(iteratee, 2));
  8595. }
  8596. /**
  8597. * This method is like `_.indexOf` except that it performs a binary
  8598. * search on a sorted `array`.
  8599. *
  8600. * @static
  8601. * @memberOf _
  8602. * @since 4.0.0
  8603. * @category Array
  8604. * @param {Array} array The array to inspect.
  8605. * @param {*} value The value to search for.
  8606. * @returns {number} Returns the index of the matched value, else `-1`.
  8607. * @example
  8608. *
  8609. * _.sortedIndexOf([4, 5, 5, 5, 6], 5);
  8610. * // => 1
  8611. */
  8612. function sortedIndexOf(array, value) {
  8613. var length = array == null ? 0 : array.length;
  8614. if (length) {
  8615. var index = baseSortedIndex(array, value);
  8616. if (index < length && eq(array[index], value)) {
  8617. return index;
  8618. }
  8619. }
  8620. return -1;
  8621. }
  8622. /**
  8623. * This method is like `_.sortedIndex` except that it returns the highest
  8624. * index at which `value` should be inserted into `array` in order to
  8625. * maintain its sort order.
  8626. *
  8627. * @static
  8628. * @memberOf _
  8629. * @since 3.0.0
  8630. * @category Array
  8631. * @param {Array} array The sorted array to inspect.
  8632. * @param {*} value The value to evaluate.
  8633. * @returns {number} Returns the index at which `value` should be inserted
  8634. * into `array`.
  8635. * @example
  8636. *
  8637. * _.sortedLastIndex([4, 5, 5, 5, 6], 5);
  8638. * // => 4
  8639. */
  8640. function sortedLastIndex(array, value) {
  8641. return baseSortedIndex(array, value, true);
  8642. }
  8643. /**
  8644. * This method is like `_.sortedLastIndex` except that it accepts `iteratee`
  8645. * which is invoked for `value` and each element of `array` to compute their
  8646. * sort ranking. The iteratee is invoked with one argument: (value).
  8647. *
  8648. * @static
  8649. * @memberOf _
  8650. * @since 4.0.0
  8651. * @category Array
  8652. * @param {Array} array The sorted array to inspect.
  8653. * @param {*} value The value to evaluate.
  8654. * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
  8655. * @returns {number} Returns the index at which `value` should be inserted
  8656. * into `array`.
  8657. * @example
  8658. *
  8659. * var objects = [{ 'x': 4 }, { 'x': 5 }];
  8660. *
  8661. * _.sortedLastIndexBy(objects, { 'x': 4 }, function(o) { return o.x; });
  8662. * // => 1
  8663. *
  8664. * // The `_.property` iteratee shorthand.
  8665. * _.sortedLastIndexBy(objects, { 'x': 4 }, 'x');
  8666. * // => 1
  8667. */
  8668. function sortedLastIndexBy(array, value, iteratee) {
  8669. return baseSortedIndexBy(array, value, getIteratee(iteratee, 2), true);
  8670. }
  8671. /**
  8672. * This method is like `_.lastIndexOf` except that it performs a binary
  8673. * search on a sorted `array`.
  8674. *
  8675. * @static
  8676. * @memberOf _
  8677. * @since 4.0.0
  8678. * @category Array
  8679. * @param {Array} array The array to inspect.
  8680. * @param {*} value The value to search for.
  8681. * @returns {number} Returns the index of the matched value, else `-1`.
  8682. * @example
  8683. *
  8684. * _.sortedLastIndexOf([4, 5, 5, 5, 6], 5);
  8685. * // => 3
  8686. */
  8687. function sortedLastIndexOf(array, value) {
  8688. var length = array == null ? 0 : array.length;
  8689. if (length) {
  8690. var index = baseSortedIndex(array, value, true) - 1;
  8691. if (eq(array[index], value)) {
  8692. return index;
  8693. }
  8694. }
  8695. return -1;
  8696. }
  8697. /**
  8698. * This method is like `_.uniq` except that it's designed and optimized
  8699. * for sorted arrays.
  8700. *
  8701. * @static
  8702. * @memberOf _
  8703. * @since 4.0.0
  8704. * @category Array
  8705. * @param {Array} array The array to inspect.
  8706. * @returns {Array} Returns the new duplicate free array.
  8707. * @example
  8708. *
  8709. * _.sortedUniq([1, 1, 2]);
  8710. * // => [1, 2]
  8711. */
  8712. function sortedUniq(array) {
  8713. return (array && array.length)
  8714. ? baseSortedUniq(array)
  8715. : [];
  8716. }
  8717. /**
  8718. * This method is like `_.uniqBy` except that it's designed and optimized
  8719. * for sorted arrays.
  8720. *
  8721. * @static
  8722. * @memberOf _
  8723. * @since 4.0.0
  8724. * @category Array
  8725. * @param {Array} array The array to inspect.
  8726. * @param {Function} [iteratee] The iteratee invoked per element.
  8727. * @returns {Array} Returns the new duplicate free array.
  8728. * @example
  8729. *
  8730. * _.sortedUniqBy([1.1, 1.2, 2.3, 2.4], Math.floor);
  8731. * // => [1.1, 2.3]
  8732. */
  8733. function sortedUniqBy(array, iteratee) {
  8734. return (array && array.length)
  8735. ? baseSortedUniq(array, getIteratee(iteratee, 2))
  8736. : [];
  8737. }
  8738. /**
  8739. * Gets all but the first element of `array`.
  8740. *
  8741. * @static
  8742. * @memberOf _
  8743. * @since 4.0.0
  8744. * @category Array
  8745. * @param {Array} array The array to query.
  8746. * @returns {Array} Returns the slice of `array`.
  8747. * @example
  8748. *
  8749. * _.tail([1, 2, 3]);
  8750. * // => [2, 3]
  8751. */
  8752. function tail(array) {
  8753. var length = array == null ? 0 : array.length;
  8754. return length ? baseSlice(array, 1, length) : [];
  8755. }
  8756. /**
  8757. * Creates a slice of `array` with `n` elements taken from the beginning.
  8758. *
  8759. * @static
  8760. * @memberOf _
  8761. * @since 0.1.0
  8762. * @category Array
  8763. * @param {Array} array The array to query.
  8764. * @param {number} [n=1] The number of elements to take.
  8765. * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
  8766. * @returns {Array} Returns the slice of `array`.
  8767. * @example
  8768. *
  8769. * _.take([1, 2, 3]);
  8770. * // => [1]
  8771. *
  8772. * _.take([1, 2, 3], 2);
  8773. * // => [1, 2]
  8774. *
  8775. * _.take([1, 2, 3], 5);
  8776. * // => [1, 2, 3]
  8777. *
  8778. * _.take([1, 2, 3], 0);
  8779. * // => []
  8780. */
  8781. function take(array, n, guard) {
  8782. if (!(array && array.length)) {
  8783. return [];
  8784. }
  8785. n = (guard || n === undefined) ? 1 : toInteger(n);
  8786. return baseSlice(array, 0, n < 0 ? 0 : n);
  8787. }
  8788. /**
  8789. * Creates a slice of `array` with `n` elements taken from the end.
  8790. *
  8791. * @static
  8792. * @memberOf _
  8793. * @since 3.0.0
  8794. * @category Array
  8795. * @param {Array} array The array to query.
  8796. * @param {number} [n=1] The number of elements to take.
  8797. * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
  8798. * @returns {Array} Returns the slice of `array`.
  8799. * @example
  8800. *
  8801. * _.takeRight([1, 2, 3]);
  8802. * // => [3]
  8803. *
  8804. * _.takeRight([1, 2, 3], 2);
  8805. * // => [2, 3]
  8806. *
  8807. * _.takeRight([1, 2, 3], 5);
  8808. * // => [1, 2, 3]
  8809. *
  8810. * _.takeRight([1, 2, 3], 0);
  8811. * // => []
  8812. */
  8813. function takeRight(array, n, guard) {
  8814. var length = array == null ? 0 : array.length;
  8815. if (!length) {
  8816. return [];
  8817. }
  8818. n = (guard || n === undefined) ? 1 : toInteger(n);
  8819. n = length - n;
  8820. return baseSlice(array, n < 0 ? 0 : n, length);
  8821. }
  8822. /**
  8823. * Creates a slice of `array` with elements taken from the end. Elements are
  8824. * taken until `predicate` returns falsey. The predicate is invoked with
  8825. * three arguments: (value, index, array).
  8826. *
  8827. * @static
  8828. * @memberOf _
  8829. * @since 3.0.0
  8830. * @category Array
  8831. * @param {Array} array The array to query.
  8832. * @param {Function} [predicate=_.identity] The function invoked per iteration.
  8833. * @returns {Array} Returns the slice of `array`.
  8834. * @example
  8835. *
  8836. * var users = [
  8837. * { 'user': 'barney', 'active': true },
  8838. * { 'user': 'fred', 'active': false },
  8839. * { 'user': 'pebbles', 'active': false }
  8840. * ];
  8841. *
  8842. * _.takeRightWhile(users, function(o) { return !o.active; });
  8843. * // => objects for ['fred', 'pebbles']
  8844. *
  8845. * // The `_.matches` iteratee shorthand.
  8846. * _.takeRightWhile(users, { 'user': 'pebbles', 'active': false });
  8847. * // => objects for ['pebbles']
  8848. *
  8849. * // The `_.matchesProperty` iteratee shorthand.
  8850. * _.takeRightWhile(users, ['active', false]);
  8851. * // => objects for ['fred', 'pebbles']
  8852. *
  8853. * // The `_.property` iteratee shorthand.
  8854. * _.takeRightWhile(users, 'active');
  8855. * // => []
  8856. */
  8857. function takeRightWhile(array, predicate) {
  8858. return (array && array.length)
  8859. ? baseWhile(array, getIteratee(predicate, 3), false, true)
  8860. : [];
  8861. }
  8862. /**
  8863. * Creates a slice of `array` with elements taken from the beginning. Elements
  8864. * are taken until `predicate` returns falsey. The predicate is invoked with
  8865. * three arguments: (value, index, array).
  8866. *
  8867. * @static
  8868. * @memberOf _
  8869. * @since 3.0.0
  8870. * @category Array
  8871. * @param {Array} array The array to query.
  8872. * @param {Function} [predicate=_.identity] The function invoked per iteration.
  8873. * @returns {Array} Returns the slice of `array`.
  8874. * @example
  8875. *
  8876. * var users = [
  8877. * { 'user': 'barney', 'active': false },
  8878. * { 'user': 'fred', 'active': false },
  8879. * { 'user': 'pebbles', 'active': true }
  8880. * ];
  8881. *
  8882. * _.takeWhile(users, function(o) { return !o.active; });
  8883. * // => objects for ['barney', 'fred']
  8884. *
  8885. * // The `_.matches` iteratee shorthand.
  8886. * _.takeWhile(users, { 'user': 'barney', 'active': false });
  8887. * // => objects for ['barney']
  8888. *
  8889. * // The `_.matchesProperty` iteratee shorthand.
  8890. * _.takeWhile(users, ['active', false]);
  8891. * // => objects for ['barney', 'fred']
  8892. *
  8893. * // The `_.property` iteratee shorthand.
  8894. * _.takeWhile(users, 'active');
  8895. * // => []
  8896. */
  8897. function takeWhile(array, predicate) {
  8898. return (array && array.length)
  8899. ? baseWhile(array, getIteratee(predicate, 3))
  8900. : [];
  8901. }
  8902. /**
  8903. * Creates an array of unique values, in order, from all given arrays using
  8904. * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
  8905. * for equality comparisons.
  8906. *
  8907. * @static
  8908. * @memberOf _
  8909. * @since 0.1.0
  8910. * @category Array
  8911. * @param {...Array} [arrays] The arrays to inspect.
  8912. * @returns {Array} Returns the new array of combined values.
  8913. * @example
  8914. *
  8915. * _.union([2], [1, 2]);
  8916. * // => [2, 1]
  8917. */
  8918. var union = baseRest(function(arrays) {
  8919. return baseUniq(baseFlatten(arrays, 1, isArrayLikeObject, true));
  8920. });
  8921. /**
  8922. * This method is like `_.union` except that it accepts `iteratee` which is
  8923. * invoked for each element of each `arrays` to generate the criterion by
  8924. * which uniqueness is computed. Result values are chosen from the first
  8925. * array in which the value occurs. The iteratee is invoked with one argument:
  8926. * (value).
  8927. *
  8928. * @static
  8929. * @memberOf _
  8930. * @since 4.0.0
  8931. * @category Array
  8932. * @param {...Array} [arrays] The arrays to inspect.
  8933. * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
  8934. * @returns {Array} Returns the new array of combined values.
  8935. * @example
  8936. *
  8937. * _.unionBy([2.1], [1.2, 2.3], Math.floor);
  8938. * // => [2.1, 1.2]
  8939. *
  8940. * // The `_.property` iteratee shorthand.
  8941. * _.unionBy([{ 'x': 1 }], [{ 'x': 2 }, { 'x': 1 }], 'x');
  8942. * // => [{ 'x': 1 }, { 'x': 2 }]
  8943. */
  8944. var unionBy = baseRest(function(arrays) {
  8945. var iteratee = last(arrays);
  8946. if (isArrayLikeObject(iteratee)) {
  8947. iteratee = undefined;
  8948. }
  8949. return baseUniq(baseFlatten(arrays, 1, isArrayLikeObject, true), getIteratee(iteratee, 2));
  8950. });
  8951. /**
  8952. * This method is like `_.union` except that it accepts `comparator` which
  8953. * is invoked to compare elements of `arrays`. Result values are chosen from
  8954. * the first array in which the value occurs. The comparator is invoked
  8955. * with two arguments: (arrVal, othVal).
  8956. *
  8957. * @static
  8958. * @memberOf _
  8959. * @since 4.0.0
  8960. * @category Array
  8961. * @param {...Array} [arrays] The arrays to inspect.
  8962. * @param {Function} [comparator] The comparator invoked per element.
  8963. * @returns {Array} Returns the new array of combined values.
  8964. * @example
  8965. *
  8966. * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }];
  8967. * var others = [{ 'x': 1, 'y': 1 }, { 'x': 1, 'y': 2 }];
  8968. *
  8969. * _.unionWith(objects, others, _.isEqual);
  8970. * // => [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }, { 'x': 1, 'y': 1 }]
  8971. */
  8972. var unionWith = baseRest(function(arrays) {
  8973. var comparator = last(arrays);
  8974. comparator = typeof comparator == 'function' ? comparator : undefined;
  8975. return baseUniq(baseFlatten(arrays, 1, isArrayLikeObject, true), undefined, comparator);
  8976. });
  8977. /**
  8978. * Creates a duplicate-free version of an array, using
  8979. * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
  8980. * for equality comparisons, in which only the first occurrence of each element
  8981. * is kept. The order of result values is determined by the order they occur
  8982. * in the array.
  8983. *
  8984. * @static
  8985. * @memberOf _
  8986. * @since 0.1.0
  8987. * @category Array
  8988. * @param {Array} array The array to inspect.
  8989. * @returns {Array} Returns the new duplicate free array.
  8990. * @example
  8991. *
  8992. * _.uniq([2, 1, 2]);
  8993. * // => [2, 1]
  8994. */
  8995. function uniq(array) {
  8996. return (array && array.length) ? baseUniq(array) : [];
  8997. }
  8998. /**
  8999. * This method is like `_.uniq` except that it accepts `iteratee` which is
  9000. * invoked for each element in `array` to generate the criterion by which
  9001. * uniqueness is computed. The order of result values is determined by the
  9002. * order they occur in the array. The iteratee is invoked with one argument:
  9003. * (value).
  9004. *
  9005. * @static
  9006. * @memberOf _
  9007. * @since 4.0.0
  9008. * @category Array
  9009. * @param {Array} array The array to inspect.
  9010. * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
  9011. * @returns {Array} Returns the new duplicate free array.
  9012. * @example
  9013. *
  9014. * _.uniqBy([2.1, 1.2, 2.3], Math.floor);
  9015. * // => [2.1, 1.2]
  9016. *
  9017. * // The `_.property` iteratee shorthand.
  9018. * _.uniqBy([{ 'x': 1 }, { 'x': 2 }, { 'x': 1 }], 'x');
  9019. * // => [{ 'x': 1 }, { 'x': 2 }]
  9020. */
  9021. function uniqBy(array, iteratee) {
  9022. return (array && array.length) ? baseUniq(array, getIteratee(iteratee, 2)) : [];
  9023. }
  9024. /**
  9025. * This method is like `_.uniq` except that it accepts `comparator` which
  9026. * is invoked to compare elements of `array`. The order of result values is
  9027. * determined by the order they occur in the array.The comparator is invoked
  9028. * with two arguments: (arrVal, othVal).
  9029. *
  9030. * @static
  9031. * @memberOf _
  9032. * @since 4.0.0
  9033. * @category Array
  9034. * @param {Array} array The array to inspect.
  9035. * @param {Function} [comparator] The comparator invoked per element.
  9036. * @returns {Array} Returns the new duplicate free array.
  9037. * @example
  9038. *
  9039. * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }, { 'x': 1, 'y': 2 }];
  9040. *
  9041. * _.uniqWith(objects, _.isEqual);
  9042. * // => [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }]
  9043. */
  9044. function uniqWith(array, comparator) {
  9045. comparator = typeof comparator == 'function' ? comparator : undefined;
  9046. return (array && array.length) ? baseUniq(array, undefined, comparator) : [];
  9047. }
  9048. /**
  9049. * This method is like `_.zip` except that it accepts an array of grouped
  9050. * elements and creates an array regrouping the elements to their pre-zip
  9051. * configuration.
  9052. *
  9053. * @static
  9054. * @memberOf _
  9055. * @since 1.2.0
  9056. * @category Array
  9057. * @param {Array} array The array of grouped elements to process.
  9058. * @returns {Array} Returns the new array of regrouped elements.
  9059. * @example
  9060. *
  9061. * var zipped = _.zip(['a', 'b'], [1, 2], [true, false]);
  9062. * // => [['a', 1, true], ['b', 2, false]]
  9063. *
  9064. * _.unzip(zipped);
  9065. * // => [['a', 'b'], [1, 2], [true, false]]
  9066. */
  9067. function unzip(array) {
  9068. if (!(array && array.length)) {
  9069. return [];
  9070. }
  9071. var length = 0;
  9072. array = arrayFilter(array, function(group) {
  9073. if (isArrayLikeObject(group)) {
  9074. length = nativeMax(group.length, length);
  9075. return true;
  9076. }
  9077. });
  9078. return baseTimes(length, function(index) {
  9079. return arrayMap(array, baseProperty(index));
  9080. });
  9081. }
  9082. /**
  9083. * This method is like `_.unzip` except that it accepts `iteratee` to specify
  9084. * how regrouped values should be combined. The iteratee is invoked with the
  9085. * elements of each group: (...group).
  9086. *
  9087. * @static
  9088. * @memberOf _
  9089. * @since 3.8.0
  9090. * @category Array
  9091. * @param {Array} array The array of grouped elements to process.
  9092. * @param {Function} [iteratee=_.identity] The function to combine
  9093. * regrouped values.
  9094. * @returns {Array} Returns the new array of regrouped elements.
  9095. * @example
  9096. *
  9097. * var zipped = _.zip([1, 2], [10, 20], [100, 200]);
  9098. * // => [[1, 10, 100], [2, 20, 200]]
  9099. *
  9100. * _.unzipWith(zipped, _.add);
  9101. * // => [3, 30, 300]
  9102. */
  9103. function unzipWith(array, iteratee) {
  9104. if (!(array && array.length)) {
  9105. return [];
  9106. }
  9107. var result = unzip(array);
  9108. if (iteratee == null) {
  9109. return result;
  9110. }
  9111. return arrayMap(result, function(group) {
  9112. return apply(iteratee, undefined, group);
  9113. });
  9114. }
  9115. /**
  9116. * Creates an array excluding all given values using
  9117. * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
  9118. * for equality comparisons.
  9119. *
  9120. * **Note:** Unlike `_.pull`, this method returns a new array.
  9121. *
  9122. * @static
  9123. * @memberOf _
  9124. * @since 0.1.0
  9125. * @category Array
  9126. * @param {Array} array The array to inspect.
  9127. * @param {...*} [values] The values to exclude.
  9128. * @returns {Array} Returns the new array of filtered values.
  9129. * @see _.difference, _.xor
  9130. * @example
  9131. *
  9132. * _.without([2, 1, 2, 3], 1, 2);
  9133. * // => [3]
  9134. */
  9135. var without = baseRest(function(array, values) {
  9136. return isArrayLikeObject(array)
  9137. ? baseDifference(array, values)
  9138. : [];
  9139. });
  9140. /**
  9141. * Creates an array of unique values that is the
  9142. * [symmetric difference](https://en.wikipedia.org/wiki/Symmetric_difference)
  9143. * of the given arrays. The order of result values is determined by the order
  9144. * they occur in the arrays.
  9145. *
  9146. * @static
  9147. * @memberOf _
  9148. * @since 2.4.0
  9149. * @category Array
  9150. * @param {...Array} [arrays] The arrays to inspect.
  9151. * @returns {Array} Returns the new array of filtered values.
  9152. * @see _.difference, _.without
  9153. * @example
  9154. *
  9155. * _.xor([2, 1], [2, 3]);
  9156. * // => [1, 3]
  9157. */
  9158. var xor = baseRest(function(arrays) {
  9159. return baseXor(arrayFilter(arrays, isArrayLikeObject));
  9160. });
  9161. /**
  9162. * This method is like `_.xor` except that it accepts `iteratee` which is
  9163. * invoked for each element of each `arrays` to generate the criterion by
  9164. * which by which they're compared. The order of result values is determined
  9165. * by the order they occur in the arrays. The iteratee is invoked with one
  9166. * argument: (value).
  9167. *
  9168. * @static
  9169. * @memberOf _
  9170. * @since 4.0.0
  9171. * @category Array
  9172. * @param {...Array} [arrays] The arrays to inspect.
  9173. * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
  9174. * @returns {Array} Returns the new array of filtered values.
  9175. * @example
  9176. *
  9177. * _.xorBy([2.1, 1.2], [2.3, 3.4], Math.floor);
  9178. * // => [1.2, 3.4]
  9179. *
  9180. * // The `_.property` iteratee shorthand.
  9181. * _.xorBy([{ 'x': 1 }], [{ 'x': 2 }, { 'x': 1 }], 'x');
  9182. * // => [{ 'x': 2 }]
  9183. */
  9184. var xorBy = baseRest(function(arrays) {
  9185. var iteratee = last(arrays);
  9186. if (isArrayLikeObject(iteratee)) {
  9187. iteratee = undefined;
  9188. }
  9189. return baseXor(arrayFilter(arrays, isArrayLikeObject), getIteratee(iteratee, 2));
  9190. });
  9191. /**
  9192. * This method is like `_.xor` except that it accepts `comparator` which is
  9193. * invoked to compare elements of `arrays`. The order of result values is
  9194. * determined by the order they occur in the arrays. The comparator is invoked
  9195. * with two arguments: (arrVal, othVal).
  9196. *
  9197. * @static
  9198. * @memberOf _
  9199. * @since 4.0.0
  9200. * @category Array
  9201. * @param {...Array} [arrays] The arrays to inspect.
  9202. * @param {Function} [comparator] The comparator invoked per element.
  9203. * @returns {Array} Returns the new array of filtered values.
  9204. * @example
  9205. *
  9206. * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }];
  9207. * var others = [{ 'x': 1, 'y': 1 }, { 'x': 1, 'y': 2 }];
  9208. *
  9209. * _.xorWith(objects, others, _.isEqual);
  9210. * // => [{ 'x': 2, 'y': 1 }, { 'x': 1, 'y': 1 }]
  9211. */
  9212. var xorWith = baseRest(function(arrays) {
  9213. var comparator = last(arrays);
  9214. comparator = typeof comparator == 'function' ? comparator : undefined;
  9215. return baseXor(arrayFilter(arrays, isArrayLikeObject), undefined, comparator);
  9216. });
  9217. /**
  9218. * Creates an array of grouped elements, the first of which contains the
  9219. * first elements of the given arrays, the second of which contains the
  9220. * second elements of the given arrays, and so on.
  9221. *
  9222. * @static
  9223. * @memberOf _
  9224. * @since 0.1.0
  9225. * @category Array
  9226. * @param {...Array} [arrays] The arrays to process.
  9227. * @returns {Array} Returns the new array of grouped elements.
  9228. * @example
  9229. *
  9230. * _.zip(['a', 'b'], [1, 2], [true, false]);
  9231. * // => [['a', 1, true], ['b', 2, false]]
  9232. */
  9233. var zip = baseRest(unzip);
  9234. /**
  9235. * This method is like `_.fromPairs` except that it accepts two arrays,
  9236. * one of property identifiers and one of corresponding values.
  9237. *
  9238. * @static
  9239. * @memberOf _
  9240. * @since 0.4.0
  9241. * @category Array
  9242. * @param {Array} [props=[]] The property identifiers.
  9243. * @param {Array} [values=[]] The property values.
  9244. * @returns {Object} Returns the new object.
  9245. * @example
  9246. *
  9247. * _.zipObject(['a', 'b'], [1, 2]);
  9248. * // => { 'a': 1, 'b': 2 }
  9249. */
  9250. function zipObject(props, values) {
  9251. return baseZipObject(props || [], values || [], assignValue);
  9252. }
  9253. /**
  9254. * This method is like `_.zipObject` except that it supports property paths.
  9255. *
  9256. * @static
  9257. * @memberOf _
  9258. * @since 4.1.0
  9259. * @category Array
  9260. * @param {Array} [props=[]] The property identifiers.
  9261. * @param {Array} [values=[]] The property values.
  9262. * @returns {Object} Returns the new object.
  9263. * @example
  9264. *
  9265. * _.zipObjectDeep(['a.b[0].c', 'a.b[1].d'], [1, 2]);
  9266. * // => { 'a': { 'b': [{ 'c': 1 }, { 'd': 2 }] } }
  9267. */
  9268. function zipObjectDeep(props, values) {
  9269. return baseZipObject(props || [], values || [], baseSet);
  9270. }
  9271. /**
  9272. * This method is like `_.zip` except that it accepts `iteratee` to specify
  9273. * how grouped values should be combined. The iteratee is invoked with the
  9274. * elements of each group: (...group).
  9275. *
  9276. * @static
  9277. * @memberOf _
  9278. * @since 3.8.0
  9279. * @category Array
  9280. * @param {...Array} [arrays] The arrays to process.
  9281. * @param {Function} [iteratee=_.identity] The function to combine
  9282. * grouped values.
  9283. * @returns {Array} Returns the new array of grouped elements.
  9284. * @example
  9285. *
  9286. * _.zipWith([1, 2], [10, 20], [100, 200], function(a, b, c) {
  9287. * return a + b + c;
  9288. * });
  9289. * // => [111, 222]
  9290. */
  9291. var zipWith = baseRest(function(arrays) {
  9292. var length = arrays.length,
  9293. iteratee = length > 1 ? arrays[length - 1] : undefined;
  9294. iteratee = typeof iteratee == 'function' ? (arrays.pop(), iteratee) : undefined;
  9295. return unzipWith(arrays, iteratee);
  9296. });
  9297. /*------------------------------------------------------------------------*/
  9298. /**
  9299. * Creates a `lodash` wrapper instance that wraps `value` with explicit method
  9300. * chain sequences enabled. The result of such sequences must be unwrapped
  9301. * with `_#value`.
  9302. *
  9303. * @static
  9304. * @memberOf _
  9305. * @since 1.3.0
  9306. * @category Seq
  9307. * @param {*} value The value to wrap.
  9308. * @returns {Object} Returns the new `lodash` wrapper instance.
  9309. * @example
  9310. *
  9311. * var users = [
  9312. * { 'user': 'barney', 'age': 36 },
  9313. * { 'user': 'fred', 'age': 40 },
  9314. * { 'user': 'pebbles', 'age': 1 }
  9315. * ];
  9316. *
  9317. * var youngest = _
  9318. * .chain(users)
  9319. * .sortBy('age')
  9320. * .map(function(o) {
  9321. * return o.user + ' is ' + o.age;
  9322. * })
  9323. * .head()
  9324. * .value();
  9325. * // => 'pebbles is 1'
  9326. */
  9327. function chain(value) {
  9328. var result = lodash(value);
  9329. result.__chain__ = true;
  9330. return result;
  9331. }
  9332. /**
  9333. * This method invokes `interceptor` and returns `value`. The interceptor
  9334. * is invoked with one argument; (value). The purpose of this method is to
  9335. * "tap into" a method chain sequence in order to modify intermediate results.
  9336. *
  9337. * @static
  9338. * @memberOf _
  9339. * @since 0.1.0
  9340. * @category Seq
  9341. * @param {*} value The value to provide to `interceptor`.
  9342. * @param {Function} interceptor The function to invoke.
  9343. * @returns {*} Returns `value`.
  9344. * @example
  9345. *
  9346. * _([1, 2, 3])
  9347. * .tap(function(array) {
  9348. * // Mutate input array.
  9349. * array.pop();
  9350. * })
  9351. * .reverse()
  9352. * .value();
  9353. * // => [2, 1]
  9354. */
  9355. function tap(value, interceptor) {
  9356. interceptor(value);
  9357. return value;
  9358. }
  9359. /**
  9360. * This method is like `_.tap` except that it returns the result of `interceptor`.
  9361. * The purpose of this method is to "pass thru" values replacing intermediate
  9362. * results in a method chain sequence.
  9363. *
  9364. * @static
  9365. * @memberOf _
  9366. * @since 3.0.0
  9367. * @category Seq
  9368. * @param {*} value The value to provide to `interceptor`.
  9369. * @param {Function} interceptor The function to invoke.
  9370. * @returns {*} Returns the result of `interceptor`.
  9371. * @example
  9372. *
  9373. * _(' abc ')
  9374. * .chain()
  9375. * .trim()
  9376. * .thru(function(value) {
  9377. * return [value];
  9378. * })
  9379. * .value();
  9380. * // => ['abc']
  9381. */
  9382. function thru(value, interceptor) {
  9383. return interceptor(value);
  9384. }
  9385. /**
  9386. * This method is the wrapper version of `_.at`.
  9387. *
  9388. * @name at
  9389. * @memberOf _
  9390. * @since 1.0.0
  9391. * @category Seq
  9392. * @param {...(string|string[])} [paths] The property paths to pick.
  9393. * @returns {Object} Returns the new `lodash` wrapper instance.
  9394. * @example
  9395. *
  9396. * var object = { 'a': [{ 'b': { 'c': 3 } }, 4] };
  9397. *
  9398. * _(object).at(['a[0].b.c', 'a[1]']).value();
  9399. * // => [3, 4]
  9400. */
  9401. var wrapperAt = flatRest(function(paths) {
  9402. var length = paths.length,
  9403. start = length ? paths[0] : 0,
  9404. value = this.__wrapped__,
  9405. interceptor = function(object) { return baseAt(object, paths); };
  9406. if (length > 1 || this.__actions__.length ||
  9407. !(value instanceof LazyWrapper) || !isIndex(start)) {
  9408. return this.thru(interceptor);
  9409. }
  9410. value = value.slice(start, +start + (length ? 1 : 0));
  9411. value.__actions__.push({
  9412. 'func': thru,
  9413. 'args': [interceptor],
  9414. 'thisArg': undefined
  9415. });
  9416. return new LodashWrapper(value, this.__chain__).thru(function(array) {
  9417. if (length && !array.length) {
  9418. array.push(undefined);
  9419. }
  9420. return array;
  9421. });
  9422. });
  9423. /**
  9424. * Creates a `lodash` wrapper instance with explicit method chain sequences enabled.
  9425. *
  9426. * @name chain
  9427. * @memberOf _
  9428. * @since 0.1.0
  9429. * @category Seq
  9430. * @returns {Object} Returns the new `lodash` wrapper instance.
  9431. * @example
  9432. *
  9433. * var users = [
  9434. * { 'user': 'barney', 'age': 36 },
  9435. * { 'user': 'fred', 'age': 40 }
  9436. * ];
  9437. *
  9438. * // A sequence without explicit chaining.
  9439. * _(users).head();
  9440. * // => { 'user': 'barney', 'age': 36 }
  9441. *
  9442. * // A sequence with explicit chaining.
  9443. * _(users)
  9444. * .chain()
  9445. * .head()
  9446. * .pick('user')
  9447. * .value();
  9448. * // => { 'user': 'barney' }
  9449. */
  9450. function wrapperChain() {
  9451. return chain(this);
  9452. }
  9453. /**
  9454. * Executes the chain sequence and returns the wrapped result.
  9455. *
  9456. * @name commit
  9457. * @memberOf _
  9458. * @since 3.2.0
  9459. * @category Seq
  9460. * @returns {Object} Returns the new `lodash` wrapper instance.
  9461. * @example
  9462. *
  9463. * var array = [1, 2];
  9464. * var wrapped = _(array).push(3);
  9465. *
  9466. * console.log(array);
  9467. * // => [1, 2]
  9468. *
  9469. * wrapped = wrapped.commit();
  9470. * console.log(array);
  9471. * // => [1, 2, 3]
  9472. *
  9473. * wrapped.last();
  9474. * // => 3
  9475. *
  9476. * console.log(array);
  9477. * // => [1, 2, 3]
  9478. */
  9479. function wrapperCommit() {
  9480. return new LodashWrapper(this.value(), this.__chain__);
  9481. }
  9482. /**
  9483. * Gets the next value on a wrapped object following the
  9484. * [iterator protocol](https://mdn.io/iteration_protocols#iterator).
  9485. *
  9486. * @name next
  9487. * @memberOf _
  9488. * @since 4.0.0
  9489. * @category Seq
  9490. * @returns {Object} Returns the next iterator value.
  9491. * @example
  9492. *
  9493. * var wrapped = _([1, 2]);
  9494. *
  9495. * wrapped.next();
  9496. * // => { 'done': false, 'value': 1 }
  9497. *
  9498. * wrapped.next();
  9499. * // => { 'done': false, 'value': 2 }
  9500. *
  9501. * wrapped.next();
  9502. * // => { 'done': true, 'value': undefined }
  9503. */
  9504. function wrapperNext() {
  9505. if (this.__values__ === undefined) {
  9506. this.__values__ = toArray(this.value());
  9507. }
  9508. var done = this.__index__ >= this.__values__.length,
  9509. value = done ? undefined : this.__values__[this.__index__++];
  9510. return { 'done': done, 'value': value };
  9511. }
  9512. /**
  9513. * Enables the wrapper to be iterable.
  9514. *
  9515. * @name Symbol.iterator
  9516. * @memberOf _
  9517. * @since 4.0.0
  9518. * @category Seq
  9519. * @returns {Object} Returns the wrapper object.
  9520. * @example
  9521. *
  9522. * var wrapped = _([1, 2]);
  9523. *
  9524. * wrapped[Symbol.iterator]() === wrapped;
  9525. * // => true
  9526. *
  9527. * Array.from(wrapped);
  9528. * // => [1, 2]
  9529. */
  9530. function wrapperToIterator() {
  9531. return this;
  9532. }
  9533. /**
  9534. * Creates a clone of the chain sequence planting `value` as the wrapped value.
  9535. *
  9536. * @name plant
  9537. * @memberOf _
  9538. * @since 3.2.0
  9539. * @category Seq
  9540. * @param {*} value The value to plant.
  9541. * @returns {Object} Returns the new `lodash` wrapper instance.
  9542. * @example
  9543. *
  9544. * function square(n) {
  9545. * return n * n;
  9546. * }
  9547. *
  9548. * var wrapped = _([1, 2]).map(square);
  9549. * var other = wrapped.plant([3, 4]);
  9550. *
  9551. * other.value();
  9552. * // => [9, 16]
  9553. *
  9554. * wrapped.value();
  9555. * // => [1, 4]
  9556. */
  9557. function wrapperPlant(value) {
  9558. var result,
  9559. parent = this;
  9560. while (parent instanceof baseLodash) {
  9561. var clone = wrapperClone(parent);
  9562. clone.__index__ = 0;
  9563. clone.__values__ = undefined;
  9564. if (result) {
  9565. previous.__wrapped__ = clone;
  9566. } else {
  9567. result = clone;
  9568. }
  9569. var previous = clone;
  9570. parent = parent.__wrapped__;
  9571. }
  9572. previous.__wrapped__ = value;
  9573. return result;
  9574. }
  9575. /**
  9576. * This method is the wrapper version of `_.reverse`.
  9577. *
  9578. * **Note:** This method mutates the wrapped array.
  9579. *
  9580. * @name reverse
  9581. * @memberOf _
  9582. * @since 0.1.0
  9583. * @category Seq
  9584. * @returns {Object} Returns the new `lodash` wrapper instance.
  9585. * @example
  9586. *
  9587. * var array = [1, 2, 3];
  9588. *
  9589. * _(array).reverse().value()
  9590. * // => [3, 2, 1]
  9591. *
  9592. * console.log(array);
  9593. * // => [3, 2, 1]
  9594. */
  9595. function wrapperReverse() {
  9596. var value = this.__wrapped__;
  9597. if (value instanceof LazyWrapper) {
  9598. var wrapped = value;
  9599. if (this.__actions__.length) {
  9600. wrapped = new LazyWrapper(this);
  9601. }
  9602. wrapped = wrapped.reverse();
  9603. wrapped.__actions__.push({
  9604. 'func': thru,
  9605. 'args': [reverse],
  9606. 'thisArg': undefined
  9607. });
  9608. return new LodashWrapper(wrapped, this.__chain__);
  9609. }
  9610. return this.thru(reverse);
  9611. }
  9612. /**
  9613. * Executes the chain sequence to resolve the unwrapped value.
  9614. *
  9615. * @name value
  9616. * @memberOf _
  9617. * @since 0.1.0
  9618. * @alias toJSON, valueOf
  9619. * @category Seq
  9620. * @returns {*} Returns the resolved unwrapped value.
  9621. * @example
  9622. *
  9623. * _([1, 2, 3]).value();
  9624. * // => [1, 2, 3]
  9625. */
  9626. function wrapperValue() {
  9627. return baseWrapperValue(this.__wrapped__, this.__actions__);
  9628. }
  9629. /*------------------------------------------------------------------------*/
  9630. /**
  9631. * Creates an object composed of keys generated from the results of running
  9632. * each element of `collection` thru `iteratee`. The corresponding value of
  9633. * each key is the number of times the key was returned by `iteratee`. The
  9634. * iteratee is invoked with one argument: (value).
  9635. *
  9636. * @static
  9637. * @memberOf _
  9638. * @since 0.5.0
  9639. * @category Collection
  9640. * @param {Array|Object} collection The collection to iterate over.
  9641. * @param {Function} [iteratee=_.identity] The iteratee to transform keys.
  9642. * @returns {Object} Returns the composed aggregate object.
  9643. * @example
  9644. *
  9645. * _.countBy([6.1, 4.2, 6.3], Math.floor);
  9646. * // => { '4': 1, '6': 2 }
  9647. *
  9648. * // The `_.property` iteratee shorthand.
  9649. * _.countBy(['one', 'two', 'three'], 'length');
  9650. * // => { '3': 2, '5': 1 }
  9651. */
  9652. var countBy = createAggregator(function(result, value, key) {
  9653. if (hasOwnProperty.call(result, key)) {
  9654. ++result[key];
  9655. } else {
  9656. baseAssignValue(result, key, 1);
  9657. }
  9658. });
  9659. /**
  9660. * Checks if `predicate` returns truthy for **all** elements of `collection`.
  9661. * Iteration is stopped once `predicate` returns falsey. The predicate is
  9662. * invoked with three arguments: (value, index|key, collection).
  9663. *
  9664. * **Note:** This method returns `true` for
  9665. * [empty collections](https://en.wikipedia.org/wiki/Empty_set) because
  9666. * [everything is true](https://en.wikipedia.org/wiki/Vacuous_truth) of
  9667. * elements of empty collections.
  9668. *
  9669. * @static
  9670. * @memberOf _
  9671. * @since 0.1.0
  9672. * @category Collection
  9673. * @param {Array|Object} collection The collection to iterate over.
  9674. * @param {Function} [predicate=_.identity] The function invoked per iteration.
  9675. * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
  9676. * @returns {boolean} Returns `true` if all elements pass the predicate check,
  9677. * else `false`.
  9678. * @example
  9679. *
  9680. * _.every([true, 1, null, 'yes'], Boolean);
  9681. * // => false
  9682. *
  9683. * var users = [
  9684. * { 'user': 'barney', 'age': 36, 'active': false },
  9685. * { 'user': 'fred', 'age': 40, 'active': false }
  9686. * ];
  9687. *
  9688. * // The `_.matches` iteratee shorthand.
  9689. * _.every(users, { 'user': 'barney', 'active': false });
  9690. * // => false
  9691. *
  9692. * // The `_.matchesProperty` iteratee shorthand.
  9693. * _.every(users, ['active', false]);
  9694. * // => true
  9695. *
  9696. * // The `_.property` iteratee shorthand.
  9697. * _.every(users, 'active');
  9698. * // => false
  9699. */
  9700. function every(collection, predicate, guard) {
  9701. var func = isArray(collection) ? arrayEvery : baseEvery;
  9702. if (guard && isIterateeCall(collection, predicate, guard)) {
  9703. predicate = undefined;
  9704. }
  9705. return func(collection, getIteratee(predicate, 3));
  9706. }
  9707. /**
  9708. * Iterates over elements of `collection`, returning an array of all elements
  9709. * `predicate` returns truthy for. The predicate is invoked with three
  9710. * arguments: (value, index|key, collection).
  9711. *
  9712. * **Note:** Unlike `_.remove`, this method returns a new array.
  9713. *
  9714. * @static
  9715. * @memberOf _
  9716. * @since 0.1.0
  9717. * @category Collection
  9718. * @param {Array|Object} collection The collection to iterate over.
  9719. * @param {Function} [predicate=_.identity] The function invoked per iteration.
  9720. * @returns {Array} Returns the new filtered array.
  9721. * @see _.reject
  9722. * @example
  9723. *
  9724. * var users = [
  9725. * { 'user': 'barney', 'age': 36, 'active': true },
  9726. * { 'user': 'fred', 'age': 40, 'active': false }
  9727. * ];
  9728. *
  9729. * _.filter(users, function(o) { return !o.active; });
  9730. * // => objects for ['fred']
  9731. *
  9732. * // The `_.matches` iteratee shorthand.
  9733. * _.filter(users, { 'age': 36, 'active': true });
  9734. * // => objects for ['barney']
  9735. *
  9736. * // The `_.matchesProperty` iteratee shorthand.
  9737. * _.filter(users, ['active', false]);
  9738. * // => objects for ['fred']
  9739. *
  9740. * // The `_.property` iteratee shorthand.
  9741. * _.filter(users, 'active');
  9742. * // => objects for ['barney']
  9743. */
  9744. function filter(collection, predicate) {
  9745. var func = isArray(collection) ? arrayFilter : baseFilter;
  9746. return func(collection, getIteratee(predicate, 3));
  9747. }
  9748. /**
  9749. * Iterates over elements of `collection`, returning the first element
  9750. * `predicate` returns truthy for. The predicate is invoked with three
  9751. * arguments: (value, index|key, collection).
  9752. *
  9753. * @static
  9754. * @memberOf _
  9755. * @since 0.1.0
  9756. * @category Collection
  9757. * @param {Array|Object} collection The collection to inspect.
  9758. * @param {Function} [predicate=_.identity] The function invoked per iteration.
  9759. * @param {number} [fromIndex=0] The index to search from.
  9760. * @returns {*} Returns the matched element, else `undefined`.
  9761. * @example
  9762. *
  9763. * var users = [
  9764. * { 'user': 'barney', 'age': 36, 'active': true },
  9765. * { 'user': 'fred', 'age': 40, 'active': false },
  9766. * { 'user': 'pebbles', 'age': 1, 'active': true }
  9767. * ];
  9768. *
  9769. * _.find(users, function(o) { return o.age < 40; });
  9770. * // => object for 'barney'
  9771. *
  9772. * // The `_.matches` iteratee shorthand.
  9773. * _.find(users, { 'age': 1, 'active': true });
  9774. * // => object for 'pebbles'
  9775. *
  9776. * // The `_.matchesProperty` iteratee shorthand.
  9777. * _.find(users, ['active', false]);
  9778. * // => object for 'fred'
  9779. *
  9780. * // The `_.property` iteratee shorthand.
  9781. * _.find(users, 'active');
  9782. * // => object for 'barney'
  9783. */
  9784. var find = createFind(findIndex);
  9785. /**
  9786. * This method is like `_.find` except that it iterates over elements of
  9787. * `collection` from right to left.
  9788. *
  9789. * @static
  9790. * @memberOf _
  9791. * @since 2.0.0
  9792. * @category Collection
  9793. * @param {Array|Object} collection The collection to inspect.
  9794. * @param {Function} [predicate=_.identity] The function invoked per iteration.
  9795. * @param {number} [fromIndex=collection.length-1] The index to search from.
  9796. * @returns {*} Returns the matched element, else `undefined`.
  9797. * @example
  9798. *
  9799. * _.findLast([1, 2, 3, 4], function(n) {
  9800. * return n % 2 == 1;
  9801. * });
  9802. * // => 3
  9803. */
  9804. var findLast = createFind(findLastIndex);
  9805. /**
  9806. * Creates a flattened array of values by running each element in `collection`
  9807. * thru `iteratee` and flattening the mapped results. The iteratee is invoked
  9808. * with three arguments: (value, index|key, collection).
  9809. *
  9810. * @static
  9811. * @memberOf _
  9812. * @since 4.0.0
  9813. * @category Collection
  9814. * @param {Array|Object} collection The collection to iterate over.
  9815. * @param {Function} [iteratee=_.identity] The function invoked per iteration.
  9816. * @returns {Array} Returns the new flattened array.
  9817. * @example
  9818. *
  9819. * function duplicate(n) {
  9820. * return [n, n];
  9821. * }
  9822. *
  9823. * _.flatMap([1, 2], duplicate);
  9824. * // => [1, 1, 2, 2]
  9825. */
  9826. function flatMap(collection, iteratee) {
  9827. return baseFlatten(map(collection, iteratee), 1);
  9828. }
  9829. /**
  9830. * This method is like `_.flatMap` except that it recursively flattens the
  9831. * mapped results.
  9832. *
  9833. * @static
  9834. * @memberOf _
  9835. * @since 4.7.0
  9836. * @category Collection
  9837. * @param {Array|Object} collection The collection to iterate over.
  9838. * @param {Function} [iteratee=_.identity] The function invoked per iteration.
  9839. * @returns {Array} Returns the new flattened array.
  9840. * @example
  9841. *
  9842. * function duplicate(n) {
  9843. * return [[[n, n]]];
  9844. * }
  9845. *
  9846. * _.flatMapDeep([1, 2], duplicate);
  9847. * // => [1, 1, 2, 2]
  9848. */
  9849. function flatMapDeep(collection, iteratee) {
  9850. return baseFlatten(map(collection, iteratee), INFINITY);
  9851. }
  9852. /**
  9853. * This method is like `_.flatMap` except that it recursively flattens the
  9854. * mapped results up to `depth` times.
  9855. *
  9856. * @static
  9857. * @memberOf _
  9858. * @since 4.7.0
  9859. * @category Collection
  9860. * @param {Array|Object} collection The collection to iterate over.
  9861. * @param {Function} [iteratee=_.identity] The function invoked per iteration.
  9862. * @param {number} [depth=1] The maximum recursion depth.
  9863. * @returns {Array} Returns the new flattened array.
  9864. * @example
  9865. *
  9866. * function duplicate(n) {
  9867. * return [[[n, n]]];
  9868. * }
  9869. *
  9870. * _.flatMapDepth([1, 2], duplicate, 2);
  9871. * // => [[1, 1], [2, 2]]
  9872. */
  9873. function flatMapDepth(collection, iteratee, depth) {
  9874. depth = depth === undefined ? 1 : toInteger(depth);
  9875. return baseFlatten(map(collection, iteratee), depth);
  9876. }
  9877. /**
  9878. * Iterates over elements of `collection` and invokes `iteratee` for each element.
  9879. * The iteratee is invoked with three arguments: (value, index|key, collection).
  9880. * Iteratee functions may exit iteration early by explicitly returning `false`.
  9881. *
  9882. * **Note:** As with other "Collections" methods, objects with a "length"
  9883. * property are iterated like arrays. To avoid this behavior use `_.forIn`
  9884. * or `_.forOwn` for object iteration.
  9885. *
  9886. * @static
  9887. * @memberOf _
  9888. * @since 0.1.0
  9889. * @alias each
  9890. * @category Collection
  9891. * @param {Array|Object} collection The collection to iterate over.
  9892. * @param {Function} [iteratee=_.identity] The function invoked per iteration.
  9893. * @returns {Array|Object} Returns `collection`.
  9894. * @see _.forEachRight
  9895. * @example
  9896. *
  9897. * _.forEach([1, 2], function(value) {
  9898. * console.log(value);
  9899. * });
  9900. * // => Logs `1` then `2`.
  9901. *
  9902. * _.forEach({ 'a': 1, 'b': 2 }, function(value, key) {
  9903. * console.log(key);
  9904. * });
  9905. * // => Logs 'a' then 'b' (iteration order is not guaranteed).
  9906. */
  9907. function forEach(collection, iteratee) {
  9908. var func = isArray(collection) ? arrayEach : baseEach;
  9909. return func(collection, getIteratee(iteratee, 3));
  9910. }
  9911. /**
  9912. * This method is like `_.forEach` except that it iterates over elements of
  9913. * `collection` from right to left.
  9914. *
  9915. * @static
  9916. * @memberOf _
  9917. * @since 2.0.0
  9918. * @alias eachRight
  9919. * @category Collection
  9920. * @param {Array|Object} collection The collection to iterate over.
  9921. * @param {Function} [iteratee=_.identity] The function invoked per iteration.
  9922. * @returns {Array|Object} Returns `collection`.
  9923. * @see _.forEach
  9924. * @example
  9925. *
  9926. * _.forEachRight([1, 2], function(value) {
  9927. * console.log(value);
  9928. * });
  9929. * // => Logs `2` then `1`.
  9930. */
  9931. function forEachRight(collection, iteratee) {
  9932. var func = isArray(collection) ? arrayEachRight : baseEachRight;
  9933. return func(collection, getIteratee(iteratee, 3));
  9934. }
  9935. /**
  9936. * Creates an object composed of keys generated from the results of running
  9937. * each element of `collection` thru `iteratee`. The order of grouped values
  9938. * is determined by the order they occur in `collection`. The corresponding
  9939. * value of each key is an array of elements responsible for generating the
  9940. * key. The iteratee is invoked with one argument: (value).
  9941. *
  9942. * @static
  9943. * @memberOf _
  9944. * @since 0.1.0
  9945. * @category Collection
  9946. * @param {Array|Object} collection The collection to iterate over.
  9947. * @param {Function} [iteratee=_.identity] The iteratee to transform keys.
  9948. * @returns {Object} Returns the composed aggregate object.
  9949. * @example
  9950. *
  9951. * _.groupBy([6.1, 4.2, 6.3], Math.floor);
  9952. * // => { '4': [4.2], '6': [6.1, 6.3] }
  9953. *
  9954. * // The `_.property` iteratee shorthand.
  9955. * _.groupBy(['one', 'two', 'three'], 'length');
  9956. * // => { '3': ['one', 'two'], '5': ['three'] }
  9957. */
  9958. var groupBy = createAggregator(function(result, value, key) {
  9959. if (hasOwnProperty.call(result, key)) {
  9960. result[key].push(value);
  9961. } else {
  9962. baseAssignValue(result, key, [value]);
  9963. }
  9964. });
  9965. /**
  9966. * Checks if `value` is in `collection`. If `collection` is a string, it's
  9967. * checked for a substring of `value`, otherwise
  9968. * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
  9969. * is used for equality comparisons. If `fromIndex` is negative, it's used as
  9970. * the offset from the end of `collection`.
  9971. *
  9972. * @static
  9973. * @memberOf _
  9974. * @since 0.1.0
  9975. * @category Collection
  9976. * @param {Array|Object|string} collection The collection to inspect.
  9977. * @param {*} value The value to search for.
  9978. * @param {number} [fromIndex=0] The index to search from.
  9979. * @param- {Object} [guard] Enables use as an iteratee for methods like `_.reduce`.
  9980. * @returns {boolean} Returns `true` if `value` is found, else `false`.
  9981. * @example
  9982. *
  9983. * _.includes([1, 2, 3], 1);
  9984. * // => true
  9985. *
  9986. * _.includes([1, 2, 3], 1, 2);
  9987. * // => false
  9988. *
  9989. * _.includes({ 'a': 1, 'b': 2 }, 1);
  9990. * // => true
  9991. *
  9992. * _.includes('abcd', 'bc');
  9993. * // => true
  9994. */
  9995. function includes(collection, value, fromIndex, guard) {
  9996. collection = isArrayLike(collection) ? collection : values(collection);
  9997. fromIndex = (fromIndex && !guard) ? toInteger(fromIndex) : 0;
  9998. var length = collection.length;
  9999. if (fromIndex < 0) {
  10000. fromIndex = nativeMax(length + fromIndex, 0);
  10001. }
  10002. return isString(collection)
  10003. ? (fromIndex <= length && collection.indexOf(value, fromIndex) > -1)
  10004. : (!!length && baseIndexOf(collection, value, fromIndex) > -1);
  10005. }
  10006. /**
  10007. * Invokes the method at `path` of each element in `collection`, returning
  10008. * an array of the results of each invoked method. Any additional arguments
  10009. * are provided to each invoked method. If `path` is a function, it's invoked
  10010. * for, and `this` bound to, each element in `collection`.
  10011. *
  10012. * @static
  10013. * @memberOf _
  10014. * @since 4.0.0
  10015. * @category Collection
  10016. * @param {Array|Object} collection The collection to iterate over.
  10017. * @param {Array|Function|string} path The path of the method to invoke or
  10018. * the function invoked per iteration.
  10019. * @param {...*} [args] The arguments to invoke each method with.
  10020. * @returns {Array} Returns the array of results.
  10021. * @example
  10022. *
  10023. * _.invokeMap([[5, 1, 7], [3, 2, 1]], 'sort');
  10024. * // => [[1, 5, 7], [1, 2, 3]]
  10025. *
  10026. * _.invokeMap([123, 456], String.prototype.split, '');
  10027. * // => [['1', '2', '3'], ['4', '5', '6']]
  10028. */
  10029. var invokeMap = baseRest(function(collection, path, args) {
  10030. var index = -1,
  10031. isFunc = typeof path == 'function',
  10032. result = isArrayLike(collection) ? Array(collection.length) : [];
  10033. baseEach(collection, function(value) {
  10034. result[++index] = isFunc ? apply(path, value, args) : baseInvoke(value, path, args);
  10035. });
  10036. return result;
  10037. });
  10038. /**
  10039. * Creates an object composed of keys generated from the results of running
  10040. * each element of `collection` thru `iteratee`. The corresponding value of
  10041. * each key is the last element responsible for generating the key. The
  10042. * iteratee is invoked with one argument: (value).
  10043. *
  10044. * @static
  10045. * @memberOf _
  10046. * @since 4.0.0
  10047. * @category Collection
  10048. * @param {Array|Object} collection The collection to iterate over.
  10049. * @param {Function} [iteratee=_.identity] The iteratee to transform keys.
  10050. * @returns {Object} Returns the composed aggregate object.
  10051. * @example
  10052. *
  10053. * var array = [
  10054. * { 'dir': 'left', 'code': 97 },
  10055. * { 'dir': 'right', 'code': 100 }
  10056. * ];
  10057. *
  10058. * _.keyBy(array, function(o) {
  10059. * return String.fromCharCode(o.code);
  10060. * });
  10061. * // => { 'a': { 'dir': 'left', 'code': 97 }, 'd': { 'dir': 'right', 'code': 100 } }
  10062. *
  10063. * _.keyBy(array, 'dir');
  10064. * // => { 'left': { 'dir': 'left', 'code': 97 }, 'right': { 'dir': 'right', 'code': 100 } }
  10065. */
  10066. var keyBy = createAggregator(function(result, value, key) {
  10067. baseAssignValue(result, key, value);
  10068. });
  10069. /**
  10070. * Creates an array of values by running each element in `collection` thru
  10071. * `iteratee`. The iteratee is invoked with three arguments:
  10072. * (value, index|key, collection).
  10073. *
  10074. * Many lodash methods are guarded to work as iteratees for methods like
  10075. * `_.every`, `_.filter`, `_.map`, `_.mapValues`, `_.reject`, and `_.some`.
  10076. *
  10077. * The guarded methods are:
  10078. * `ary`, `chunk`, `curry`, `curryRight`, `drop`, `dropRight`, `every`,
  10079. * `fill`, `invert`, `parseInt`, `random`, `range`, `rangeRight`, `repeat`,
  10080. * `sampleSize`, `slice`, `some`, `sortBy`, `split`, `take`, `takeRight`,
  10081. * `template`, `trim`, `trimEnd`, `trimStart`, and `words`
  10082. *
  10083. * @static
  10084. * @memberOf _
  10085. * @since 0.1.0
  10086. * @category Collection
  10087. * @param {Array|Object} collection The collection to iterate over.
  10088. * @param {Function} [iteratee=_.identity] The function invoked per iteration.
  10089. * @returns {Array} Returns the new mapped array.
  10090. * @example
  10091. *
  10092. * function square(n) {
  10093. * return n * n;
  10094. * }
  10095. *
  10096. * _.map([4, 8], square);
  10097. * // => [16, 64]
  10098. *
  10099. * _.map({ 'a': 4, 'b': 8 }, square);
  10100. * // => [16, 64] (iteration order is not guaranteed)
  10101. *
  10102. * var users = [
  10103. * { 'user': 'barney' },
  10104. * { 'user': 'fred' }
  10105. * ];
  10106. *
  10107. * // The `_.property` iteratee shorthand.
  10108. * _.map(users, 'user');
  10109. * // => ['barney', 'fred']
  10110. */
  10111. function map(collection, iteratee) {
  10112. var func = isArray(collection) ? arrayMap : baseMap;
  10113. return func(collection, getIteratee(iteratee, 3));
  10114. }
  10115. /**
  10116. * This method is like `_.sortBy` except that it allows specifying the sort
  10117. * orders of the iteratees to sort by. If `orders` is unspecified, all values
  10118. * are sorted in ascending order. Otherwise, specify an order of "desc" for
  10119. * descending or "asc" for ascending sort order of corresponding values.
  10120. *
  10121. * @static
  10122. * @memberOf _
  10123. * @since 4.0.0
  10124. * @category Collection
  10125. * @param {Array|Object} collection The collection to iterate over.
  10126. * @param {Array[]|Function[]|Object[]|string[]} [iteratees=[_.identity]]
  10127. * The iteratees to sort by.
  10128. * @param {string[]} [orders] The sort orders of `iteratees`.
  10129. * @param- {Object} [guard] Enables use as an iteratee for methods like `_.reduce`.
  10130. * @returns {Array} Returns the new sorted array.
  10131. * @example
  10132. *
  10133. * var users = [
  10134. * { 'user': 'fred', 'age': 48 },
  10135. * { 'user': 'barney', 'age': 34 },
  10136. * { 'user': 'fred', 'age': 40 },
  10137. * { 'user': 'barney', 'age': 36 }
  10138. * ];
  10139. *
  10140. * // Sort by `user` in ascending order and by `age` in descending order.
  10141. * _.orderBy(users, ['user', 'age'], ['asc', 'desc']);
  10142. * // => objects for [['barney', 36], ['barney', 34], ['fred', 48], ['fred', 40]]
  10143. */
  10144. function orderBy(collection, iteratees, orders, guard) {
  10145. if (collection == null) {
  10146. return [];
  10147. }
  10148. if (!isArray(iteratees)) {
  10149. iteratees = iteratees == null ? [] : [iteratees];
  10150. }
  10151. orders = guard ? undefined : orders;
  10152. if (!isArray(orders)) {
  10153. orders = orders == null ? [] : [orders];
  10154. }
  10155. return baseOrderBy(collection, iteratees, orders);
  10156. }
  10157. /**
  10158. * Creates an array of elements split into two groups, the first of which
  10159. * contains elements `predicate` returns truthy for, the second of which
  10160. * contains elements `predicate` returns falsey for. The predicate is
  10161. * invoked with one argument: (value).
  10162. *
  10163. * @static
  10164. * @memberOf _
  10165. * @since 3.0.0
  10166. * @category Collection
  10167. * @param {Array|Object} collection The collection to iterate over.
  10168. * @param {Function} [predicate=_.identity] The function invoked per iteration.
  10169. * @returns {Array} Returns the array of grouped elements.
  10170. * @example
  10171. *
  10172. * var users = [
  10173. * { 'user': 'barney', 'age': 36, 'active': false },
  10174. * { 'user': 'fred', 'age': 40, 'active': true },
  10175. * { 'user': 'pebbles', 'age': 1, 'active': false }
  10176. * ];
  10177. *
  10178. * _.partition(users, function(o) { return o.active; });
  10179. * // => objects for [['fred'], ['barney', 'pebbles']]
  10180. *
  10181. * // The `_.matches` iteratee shorthand.
  10182. * _.partition(users, { 'age': 1, 'active': false });
  10183. * // => objects for [['pebbles'], ['barney', 'fred']]
  10184. *
  10185. * // The `_.matchesProperty` iteratee shorthand.
  10186. * _.partition(users, ['active', false]);
  10187. * // => objects for [['barney', 'pebbles'], ['fred']]
  10188. *
  10189. * // The `_.property` iteratee shorthand.
  10190. * _.partition(users, 'active');
  10191. * // => objects for [['fred'], ['barney', 'pebbles']]
  10192. */
  10193. var partition = createAggregator(function(result, value, key) {
  10194. result[key ? 0 : 1].push(value);
  10195. }, function() { return [[], []]; });
  10196. /**
  10197. * Reduces `collection` to a value which is the accumulated result of running
  10198. * each element in `collection` thru `iteratee`, where each successive
  10199. * invocation is supplied the return value of the previous. If `accumulator`
  10200. * is not given, the first element of `collection` is used as the initial
  10201. * value. The iteratee is invoked with four arguments:
  10202. * (accumulator, value, index|key, collection).
  10203. *
  10204. * Many lodash methods are guarded to work as iteratees for methods like
  10205. * `_.reduce`, `_.reduceRight`, and `_.transform`.
  10206. *
  10207. * The guarded methods are:
  10208. * `assign`, `defaults`, `defaultsDeep`, `includes`, `merge`, `orderBy`,
  10209. * and `sortBy`
  10210. *
  10211. * @static
  10212. * @memberOf _
  10213. * @since 0.1.0
  10214. * @category Collection
  10215. * @param {Array|Object} collection The collection to iterate over.
  10216. * @param {Function} [iteratee=_.identity] The function invoked per iteration.
  10217. * @param {*} [accumulator] The initial value.
  10218. * @returns {*} Returns the accumulated value.
  10219. * @see _.reduceRight
  10220. * @example
  10221. *
  10222. * _.reduce([1, 2], function(sum, n) {
  10223. * return sum + n;
  10224. * }, 0);
  10225. * // => 3
  10226. *
  10227. * _.reduce({ 'a': 1, 'b': 2, 'c': 1 }, function(result, value, key) {
  10228. * (result[value] || (result[value] = [])).push(key);
  10229. * return result;
  10230. * }, {});
  10231. * // => { '1': ['a', 'c'], '2': ['b'] } (iteration order is not guaranteed)
  10232. */
  10233. function reduce(collection, iteratee, accumulator) {
  10234. var func = isArray(collection) ? arrayReduce : baseReduce,
  10235. initAccum = arguments.length < 3;
  10236. return func(collection, getIteratee(iteratee, 4), accumulator, initAccum, baseEach);
  10237. }
  10238. /**
  10239. * This method is like `_.reduce` except that it iterates over elements of
  10240. * `collection` from right to left.
  10241. *
  10242. * @static
  10243. * @memberOf _
  10244. * @since 0.1.0
  10245. * @category Collection
  10246. * @param {Array|Object} collection The collection to iterate over.
  10247. * @param {Function} [iteratee=_.identity] The function invoked per iteration.
  10248. * @param {*} [accumulator] The initial value.
  10249. * @returns {*} Returns the accumulated value.
  10250. * @see _.reduce
  10251. * @example
  10252. *
  10253. * var array = [[0, 1], [2, 3], [4, 5]];
  10254. *
  10255. * _.reduceRight(array, function(flattened, other) {
  10256. * return flattened.concat(other);
  10257. * }, []);
  10258. * // => [4, 5, 2, 3, 0, 1]
  10259. */
  10260. function reduceRight(collection, iteratee, accumulator) {
  10261. var func = isArray(collection) ? arrayReduceRight : baseReduce,
  10262. initAccum = arguments.length < 3;
  10263. return func(collection, getIteratee(iteratee, 4), accumulator, initAccum, baseEachRight);
  10264. }
  10265. /**
  10266. * The opposite of `_.filter`; this method returns the elements of `collection`
  10267. * that `predicate` does **not** return truthy for.
  10268. *
  10269. * @static
  10270. * @memberOf _
  10271. * @since 0.1.0
  10272. * @category Collection
  10273. * @param {Array|Object} collection The collection to iterate over.
  10274. * @param {Function} [predicate=_.identity] The function invoked per iteration.
  10275. * @returns {Array} Returns the new filtered array.
  10276. * @see _.filter
  10277. * @example
  10278. *
  10279. * var users = [
  10280. * { 'user': 'barney', 'age': 36, 'active': false },
  10281. * { 'user': 'fred', 'age': 40, 'active': true }
  10282. * ];
  10283. *
  10284. * _.reject(users, function(o) { return !o.active; });
  10285. * // => objects for ['fred']
  10286. *
  10287. * // The `_.matches` iteratee shorthand.
  10288. * _.reject(users, { 'age': 40, 'active': true });
  10289. * // => objects for ['barney']
  10290. *
  10291. * // The `_.matchesProperty` iteratee shorthand.
  10292. * _.reject(users, ['active', false]);
  10293. * // => objects for ['fred']
  10294. *
  10295. * // The `_.property` iteratee shorthand.
  10296. * _.reject(users, 'active');
  10297. * // => objects for ['barney']
  10298. */
  10299. function reject(collection, predicate) {
  10300. var func = isArray(collection) ? arrayFilter : baseFilter;
  10301. return func(collection, negate(getIteratee(predicate, 3)));
  10302. }
  10303. /**
  10304. * Gets a random element from `collection`.
  10305. *
  10306. * @static
  10307. * @memberOf _
  10308. * @since 2.0.0
  10309. * @category Collection
  10310. * @param {Array|Object} collection The collection to sample.
  10311. * @returns {*} Returns the random element.
  10312. * @example
  10313. *
  10314. * _.sample([1, 2, 3, 4]);
  10315. * // => 2
  10316. */
  10317. function sample(collection) {
  10318. var func = isArray(collection) ? arraySample : baseSample;
  10319. return func(collection);
  10320. }
  10321. /**
  10322. * Gets `n` random elements at unique keys from `collection` up to the
  10323. * size of `collection`.
  10324. *
  10325. * @static
  10326. * @memberOf _
  10327. * @since 4.0.0
  10328. * @category Collection
  10329. * @param {Array|Object} collection The collection to sample.
  10330. * @param {number} [n=1] The number of elements to sample.
  10331. * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
  10332. * @returns {Array} Returns the random elements.
  10333. * @example
  10334. *
  10335. * _.sampleSize([1, 2, 3], 2);
  10336. * // => [3, 1]
  10337. *
  10338. * _.sampleSize([1, 2, 3], 4);
  10339. * // => [2, 3, 1]
  10340. */
  10341. function sampleSize(collection, n, guard) {
  10342. if ((guard ? isIterateeCall(collection, n, guard) : n === undefined)) {
  10343. n = 1;
  10344. } else {
  10345. n = toInteger(n);
  10346. }
  10347. var func = isArray(collection) ? arraySampleSize : baseSampleSize;
  10348. return func(collection, n);
  10349. }
  10350. /**
  10351. * Creates an array of shuffled values, using a version of the
  10352. * [Fisher-Yates shuffle](https://en.wikipedia.org/wiki/Fisher-Yates_shuffle).
  10353. *
  10354. * @static
  10355. * @memberOf _
  10356. * @since 0.1.0
  10357. * @category Collection
  10358. * @param {Array|Object} collection The collection to shuffle.
  10359. * @returns {Array} Returns the new shuffled array.
  10360. * @example
  10361. *
  10362. * _.shuffle([1, 2, 3, 4]);
  10363. * // => [4, 1, 3, 2]
  10364. */
  10365. function shuffle(collection) {
  10366. var func = isArray(collection) ? arrayShuffle : baseShuffle;
  10367. return func(collection);
  10368. }
  10369. /**
  10370. * Gets the size of `collection` by returning its length for array-like
  10371. * values or the number of own enumerable string keyed properties for objects.
  10372. *
  10373. * @static
  10374. * @memberOf _
  10375. * @since 0.1.0
  10376. * @category Collection
  10377. * @param {Array|Object|string} collection The collection to inspect.
  10378. * @returns {number} Returns the collection size.
  10379. * @example
  10380. *
  10381. * _.size([1, 2, 3]);
  10382. * // => 3
  10383. *
  10384. * _.size({ 'a': 1, 'b': 2 });
  10385. * // => 2
  10386. *
  10387. * _.size('pebbles');
  10388. * // => 7
  10389. */
  10390. function size(collection) {
  10391. if (collection == null) {
  10392. return 0;
  10393. }
  10394. if (isArrayLike(collection)) {
  10395. return isString(collection) ? stringSize(collection) : collection.length;
  10396. }
  10397. var tag = getTag(collection);
  10398. if (tag == mapTag || tag == setTag) {
  10399. return collection.size;
  10400. }
  10401. return baseKeys(collection).length;
  10402. }
  10403. /**
  10404. * Checks if `predicate` returns truthy for **any** element of `collection`.
  10405. * Iteration is stopped once `predicate` returns truthy. The predicate is
  10406. * invoked with three arguments: (value, index|key, collection).
  10407. *
  10408. * @static
  10409. * @memberOf _
  10410. * @since 0.1.0
  10411. * @category Collection
  10412. * @param {Array|Object} collection The collection to iterate over.
  10413. * @param {Function} [predicate=_.identity] The function invoked per iteration.
  10414. * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
  10415. * @returns {boolean} Returns `true` if any element passes the predicate check,
  10416. * else `false`.
  10417. * @example
  10418. *
  10419. * _.some([null, 0, 'yes', false], Boolean);
  10420. * // => true
  10421. *
  10422. * var users = [
  10423. * { 'user': 'barney', 'active': true },
  10424. * { 'user': 'fred', 'active': false }
  10425. * ];
  10426. *
  10427. * // The `_.matches` iteratee shorthand.
  10428. * _.some(users, { 'user': 'barney', 'active': false });
  10429. * // => false
  10430. *
  10431. * // The `_.matchesProperty` iteratee shorthand.
  10432. * _.some(users, ['active', false]);
  10433. * // => true
  10434. *
  10435. * // The `_.property` iteratee shorthand.
  10436. * _.some(users, 'active');
  10437. * // => true
  10438. */
  10439. function some(collection, predicate, guard) {
  10440. var func = isArray(collection) ? arraySome : baseSome;
  10441. if (guard && isIterateeCall(collection, predicate, guard)) {
  10442. predicate = undefined;
  10443. }
  10444. return func(collection, getIteratee(predicate, 3));
  10445. }
  10446. /**
  10447. * Creates an array of elements, sorted in ascending order by the results of
  10448. * running each element in a collection thru each iteratee. This method
  10449. * performs a stable sort, that is, it preserves the original sort order of
  10450. * equal elements. The iteratees are invoked with one argument: (value).
  10451. *
  10452. * @static
  10453. * @memberOf _
  10454. * @since 0.1.0
  10455. * @category Collection
  10456. * @param {Array|Object} collection The collection to iterate over.
  10457. * @param {...(Function|Function[])} [iteratees=[_.identity]]
  10458. * The iteratees to sort by.
  10459. * @returns {Array} Returns the new sorted array.
  10460. * @example
  10461. *
  10462. * var users = [
  10463. * { 'user': 'fred', 'age': 48 },
  10464. * { 'user': 'barney', 'age': 36 },
  10465. * { 'user': 'fred', 'age': 40 },
  10466. * { 'user': 'barney', 'age': 34 }
  10467. * ];
  10468. *
  10469. * _.sortBy(users, [function(o) { return o.user; }]);
  10470. * // => objects for [['barney', 36], ['barney', 34], ['fred', 48], ['fred', 40]]
  10471. *
  10472. * _.sortBy(users, ['user', 'age']);
  10473. * // => objects for [['barney', 34], ['barney', 36], ['fred', 40], ['fred', 48]]
  10474. */
  10475. var sortBy = baseRest(function(collection, iteratees) {
  10476. if (collection == null) {
  10477. return [];
  10478. }
  10479. var length = iteratees.length;
  10480. if (length > 1 && isIterateeCall(collection, iteratees[0], iteratees[1])) {
  10481. iteratees = [];
  10482. } else if (length > 2 && isIterateeCall(iteratees[0], iteratees[1], iteratees[2])) {
  10483. iteratees = [iteratees[0]];
  10484. }
  10485. return baseOrderBy(collection, baseFlatten(iteratees, 1), []);
  10486. });
  10487. /*------------------------------------------------------------------------*/
  10488. /**
  10489. * Gets the timestamp of the number of milliseconds that have elapsed since
  10490. * the Unix epoch (1 January 1970 00:00:00 UTC).
  10491. *
  10492. * @static
  10493. * @memberOf _
  10494. * @since 2.4.0
  10495. * @category Date
  10496. * @returns {number} Returns the timestamp.
  10497. * @example
  10498. *
  10499. * _.defer(function(stamp) {
  10500. * console.log(_.now() - stamp);
  10501. * }, _.now());
  10502. * // => Logs the number of milliseconds it took for the deferred invocation.
  10503. */
  10504. var now = ctxNow || function() {
  10505. return root.Date.now();
  10506. };
  10507. /*------------------------------------------------------------------------*/
  10508. /**
  10509. * The opposite of `_.before`; this method creates a function that invokes
  10510. * `func` once it's called `n` or more times.
  10511. *
  10512. * @static
  10513. * @memberOf _
  10514. * @since 0.1.0
  10515. * @category Function
  10516. * @param {number} n The number of calls before `func` is invoked.
  10517. * @param {Function} func The function to restrict.
  10518. * @returns {Function} Returns the new restricted function.
  10519. * @example
  10520. *
  10521. * var saves = ['profile', 'settings'];
  10522. *
  10523. * var done = _.after(saves.length, function() {
  10524. * console.log('done saving!');
  10525. * });
  10526. *
  10527. * _.forEach(saves, function(type) {
  10528. * asyncSave({ 'type': type, 'complete': done });
  10529. * });
  10530. * // => Logs 'done saving!' after the two async saves have completed.
  10531. */
  10532. function after(n, func) {
  10533. if (typeof func != 'function') {
  10534. throw new TypeError(FUNC_ERROR_TEXT);
  10535. }
  10536. n = toInteger(n);
  10537. return function() {
  10538. if (--n < 1) {
  10539. return func.apply(this, arguments);
  10540. }
  10541. };
  10542. }
  10543. /**
  10544. * Creates a function that invokes `func`, with up to `n` arguments,
  10545. * ignoring any additional arguments.
  10546. *
  10547. * @static
  10548. * @memberOf _
  10549. * @since 3.0.0
  10550. * @category Function
  10551. * @param {Function} func The function to cap arguments for.
  10552. * @param {number} [n=func.length] The arity cap.
  10553. * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
  10554. * @returns {Function} Returns the new capped function.
  10555. * @example
  10556. *
  10557. * _.map(['6', '8', '10'], _.ary(parseInt, 1));
  10558. * // => [6, 8, 10]
  10559. */
  10560. function ary(func, n, guard) {
  10561. n = guard ? undefined : n;
  10562. n = (func && n == null) ? func.length : n;
  10563. return createWrap(func, WRAP_ARY_FLAG, undefined, undefined, undefined, undefined, n);
  10564. }
  10565. /**
  10566. * Creates a function that invokes `func`, with the `this` binding and arguments
  10567. * of the created function, while it's called less than `n` times. Subsequent
  10568. * calls to the created function return the result of the last `func` invocation.
  10569. *
  10570. * @static
  10571. * @memberOf _
  10572. * @since 3.0.0
  10573. * @category Function
  10574. * @param {number} n The number of calls at which `func` is no longer invoked.
  10575. * @param {Function} func The function to restrict.
  10576. * @returns {Function} Returns the new restricted function.
  10577. * @example
  10578. *
  10579. * jQuery(element).on('click', _.before(5, addContactToList));
  10580. * // => Allows adding up to 4 contacts to the list.
  10581. */
  10582. function before(n, func) {
  10583. var result;
  10584. if (typeof func != 'function') {
  10585. throw new TypeError(FUNC_ERROR_TEXT);
  10586. }
  10587. n = toInteger(n);
  10588. return function() {
  10589. if (--n > 0) {
  10590. result = func.apply(this, arguments);
  10591. }
  10592. if (n <= 1) {
  10593. func = undefined;
  10594. }
  10595. return result;
  10596. };
  10597. }
  10598. /**
  10599. * Creates a function that invokes `func` with the `this` binding of `thisArg`
  10600. * and `partials` prepended to the arguments it receives.
  10601. *
  10602. * The `_.bind.placeholder` value, which defaults to `_` in monolithic builds,
  10603. * may be used as a placeholder for partially applied arguments.
  10604. *
  10605. * **Note:** Unlike native `Function#bind`, this method doesn't set the "length"
  10606. * property of bound functions.
  10607. *
  10608. * @static
  10609. * @memberOf _
  10610. * @since 0.1.0
  10611. * @category Function
  10612. * @param {Function} func The function to bind.
  10613. * @param {*} thisArg The `this` binding of `func`.
  10614. * @param {...*} [partials] The arguments to be partially applied.
  10615. * @returns {Function} Returns the new bound function.
  10616. * @example
  10617. *
  10618. * function greet(greeting, punctuation) {
  10619. * return greeting + ' ' + this.user + punctuation;
  10620. * }
  10621. *
  10622. * var object = { 'user': 'fred' };
  10623. *
  10624. * var bound = _.bind(greet, object, 'hi');
  10625. * bound('!');
  10626. * // => 'hi fred!'
  10627. *
  10628. * // Bound with placeholders.
  10629. * var bound = _.bind(greet, object, _, '!');
  10630. * bound('hi');
  10631. * // => 'hi fred!'
  10632. */
  10633. var bind = baseRest(function(func, thisArg, partials) {
  10634. var bitmask = WRAP_BIND_FLAG;
  10635. if (partials.length) {
  10636. var holders = replaceHolders(partials, getHolder(bind));
  10637. bitmask |= WRAP_PARTIAL_FLAG;
  10638. }
  10639. return createWrap(func, bitmask, thisArg, partials, holders);
  10640. });
  10641. /**
  10642. * Creates a function that invokes the method at `object[key]` with `partials`
  10643. * prepended to the arguments it receives.
  10644. *
  10645. * This method differs from `_.bind` by allowing bound functions to reference
  10646. * methods that may be redefined or don't yet exist. See
  10647. * [Peter Michaux's article](http://peter.michaux.ca/articles/lazy-function-definition-pattern)
  10648. * for more details.
  10649. *
  10650. * The `_.bindKey.placeholder` value, which defaults to `_` in monolithic
  10651. * builds, may be used as a placeholder for partially applied arguments.
  10652. *
  10653. * @static
  10654. * @memberOf _
  10655. * @since 0.10.0
  10656. * @category Function
  10657. * @param {Object} object The object to invoke the method on.
  10658. * @param {string} key The key of the method.
  10659. * @param {...*} [partials] The arguments to be partially applied.
  10660. * @returns {Function} Returns the new bound function.
  10661. * @example
  10662. *
  10663. * var object = {
  10664. * 'user': 'fred',
  10665. * 'greet': function(greeting, punctuation) {
  10666. * return greeting + ' ' + this.user + punctuation;
  10667. * }
  10668. * };
  10669. *
  10670. * var bound = _.bindKey(object, 'greet', 'hi');
  10671. * bound('!');
  10672. * // => 'hi fred!'
  10673. *
  10674. * object.greet = function(greeting, punctuation) {
  10675. * return greeting + 'ya ' + this.user + punctuation;
  10676. * };
  10677. *
  10678. * bound('!');
  10679. * // => 'hiya fred!'
  10680. *
  10681. * // Bound with placeholders.
  10682. * var bound = _.bindKey(object, 'greet', _, '!');
  10683. * bound('hi');
  10684. * // => 'hiya fred!'
  10685. */
  10686. var bindKey = baseRest(function(object, key, partials) {
  10687. var bitmask = WRAP_BIND_FLAG | WRAP_BIND_KEY_FLAG;
  10688. if (partials.length) {
  10689. var holders = replaceHolders(partials, getHolder(bindKey));
  10690. bitmask |= WRAP_PARTIAL_FLAG;
  10691. }
  10692. return createWrap(key, bitmask, object, partials, holders);
  10693. });
  10694. /**
  10695. * Creates a function that accepts arguments of `func` and either invokes
  10696. * `func` returning its result, if at least `arity` number of arguments have
  10697. * been provided, or returns a function that accepts the remaining `func`
  10698. * arguments, and so on. The arity of `func` may be specified if `func.length`
  10699. * is not sufficient.
  10700. *
  10701. * The `_.curry.placeholder` value, which defaults to `_` in monolithic builds,
  10702. * may be used as a placeholder for provided arguments.
  10703. *
  10704. * **Note:** This method doesn't set the "length" property of curried functions.
  10705. *
  10706. * @static
  10707. * @memberOf _
  10708. * @since 2.0.0
  10709. * @category Function
  10710. * @param {Function} func The function to curry.
  10711. * @param {number} [arity=func.length] The arity of `func`.
  10712. * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
  10713. * @returns {Function} Returns the new curried function.
  10714. * @example
  10715. *
  10716. * var abc = function(a, b, c) {
  10717. * return [a, b, c];
  10718. * };
  10719. *
  10720. * var curried = _.curry(abc);
  10721. *
  10722. * curried(1)(2)(3);
  10723. * // => [1, 2, 3]
  10724. *
  10725. * curried(1, 2)(3);
  10726. * // => [1, 2, 3]
  10727. *
  10728. * curried(1, 2, 3);
  10729. * // => [1, 2, 3]
  10730. *
  10731. * // Curried with placeholders.
  10732. * curried(1)(_, 3)(2);
  10733. * // => [1, 2, 3]
  10734. */
  10735. function curry(func, arity, guard) {
  10736. arity = guard ? undefined : arity;
  10737. var result = createWrap(func, WRAP_CURRY_FLAG, undefined, undefined, undefined, undefined, undefined, arity);
  10738. result.placeholder = curry.placeholder;
  10739. return result;
  10740. }
  10741. /**
  10742. * This method is like `_.curry` except that arguments are applied to `func`
  10743. * in the manner of `_.partialRight` instead of `_.partial`.
  10744. *
  10745. * The `_.curryRight.placeholder` value, which defaults to `_` in monolithic
  10746. * builds, may be used as a placeholder for provided arguments.
  10747. *
  10748. * **Note:** This method doesn't set the "length" property of curried functions.
  10749. *
  10750. * @static
  10751. * @memberOf _
  10752. * @since 3.0.0
  10753. * @category Function
  10754. * @param {Function} func The function to curry.
  10755. * @param {number} [arity=func.length] The arity of `func`.
  10756. * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
  10757. * @returns {Function} Returns the new curried function.
  10758. * @example
  10759. *
  10760. * var abc = function(a, b, c) {
  10761. * return [a, b, c];
  10762. * };
  10763. *
  10764. * var curried = _.curryRight(abc);
  10765. *
  10766. * curried(3)(2)(1);
  10767. * // => [1, 2, 3]
  10768. *
  10769. * curried(2, 3)(1);
  10770. * // => [1, 2, 3]
  10771. *
  10772. * curried(1, 2, 3);
  10773. * // => [1, 2, 3]
  10774. *
  10775. * // Curried with placeholders.
  10776. * curried(3)(1, _)(2);
  10777. * // => [1, 2, 3]
  10778. */
  10779. function curryRight(func, arity, guard) {
  10780. arity = guard ? undefined : arity;
  10781. var result = createWrap(func, WRAP_CURRY_RIGHT_FLAG, undefined, undefined, undefined, undefined, undefined, arity);
  10782. result.placeholder = curryRight.placeholder;
  10783. return result;
  10784. }
  10785. /**
  10786. * Creates a debounced function that delays invoking `func` until after `wait`
  10787. * milliseconds have elapsed since the last time the debounced function was
  10788. * invoked. The debounced function comes with a `cancel` method to cancel
  10789. * delayed `func` invocations and a `flush` method to immediately invoke them.
  10790. * Provide `options` to indicate whether `func` should be invoked on the
  10791. * leading and/or trailing edge of the `wait` timeout. The `func` is invoked
  10792. * with the last arguments provided to the debounced function. Subsequent
  10793. * calls to the debounced function return the result of the last `func`
  10794. * invocation.
  10795. *
  10796. * **Note:** If `leading` and `trailing` options are `true`, `func` is
  10797. * invoked on the trailing edge of the timeout only if the debounced function
  10798. * is invoked more than once during the `wait` timeout.
  10799. *
  10800. * If `wait` is `0` and `leading` is `false`, `func` invocation is deferred
  10801. * until to the next tick, similar to `setTimeout` with a timeout of `0`.
  10802. *
  10803. * See [David Corbacho's article](https://css-tricks.com/debouncing-throttling-explained-examples/)
  10804. * for details over the differences between `_.debounce` and `_.throttle`.
  10805. *
  10806. * @static
  10807. * @memberOf _
  10808. * @since 0.1.0
  10809. * @category Function
  10810. * @param {Function} func The function to debounce.
  10811. * @param {number} [wait=0] The number of milliseconds to delay.
  10812. * @param {Object} [options={}] The options object.
  10813. * @param {boolean} [options.leading=false]
  10814. * Specify invoking on the leading edge of the timeout.
  10815. * @param {number} [options.maxWait]
  10816. * The maximum time `func` is allowed to be delayed before it's invoked.
  10817. * @param {boolean} [options.trailing=true]
  10818. * Specify invoking on the trailing edge of the timeout.
  10819. * @returns {Function} Returns the new debounced function.
  10820. * @example
  10821. *
  10822. * // Avoid costly calculations while the window size is in flux.
  10823. * jQuery(window).on('resize', _.debounce(calculateLayout, 150));
  10824. *
  10825. * // Invoke `sendMail` when clicked, debouncing subsequent calls.
  10826. * jQuery(element).on('click', _.debounce(sendMail, 300, {
  10827. * 'leading': true,
  10828. * 'trailing': false
  10829. * }));
  10830. *
  10831. * // Ensure `batchLog` is invoked once after 1 second of debounced calls.
  10832. * var debounced = _.debounce(batchLog, 250, { 'maxWait': 1000 });
  10833. * var source = new EventSource('/stream');
  10834. * jQuery(source).on('message', debounced);
  10835. *
  10836. * // Cancel the trailing debounced invocation.
  10837. * jQuery(window).on('popstate', debounced.cancel);
  10838. */
  10839. function debounce(func, wait, options) {
  10840. var lastArgs,
  10841. lastThis,
  10842. maxWait,
  10843. result,
  10844. timerId,
  10845. lastCallTime,
  10846. lastInvokeTime = 0,
  10847. leading = false,
  10848. maxing = false,
  10849. trailing = true;
  10850. if (typeof func != 'function') {
  10851. throw new TypeError(FUNC_ERROR_TEXT);
  10852. }
  10853. wait = toNumber(wait) || 0;
  10854. if (isObject(options)) {
  10855. leading = !!options.leading;
  10856. maxing = 'maxWait' in options;
  10857. maxWait = maxing ? nativeMax(toNumber(options.maxWait) || 0, wait) : maxWait;
  10858. trailing = 'trailing' in options ? !!options.trailing : trailing;
  10859. }
  10860. function invokeFunc(time) {
  10861. var args = lastArgs,
  10862. thisArg = lastThis;
  10863. lastArgs = lastThis = undefined;
  10864. lastInvokeTime = time;
  10865. result = func.apply(thisArg, args);
  10866. return result;
  10867. }
  10868. function leadingEdge(time) {
  10869. // Reset any `maxWait` timer.
  10870. lastInvokeTime = time;
  10871. // Start the timer for the trailing edge.
  10872. timerId = setTimeout(timerExpired, wait);
  10873. // Invoke the leading edge.
  10874. return leading ? invokeFunc(time) : result;
  10875. }
  10876. function remainingWait(time) {
  10877. var timeSinceLastCall = time - lastCallTime,
  10878. timeSinceLastInvoke = time - lastInvokeTime,
  10879. timeWaiting = wait - timeSinceLastCall;
  10880. return maxing
  10881. ? nativeMin(timeWaiting, maxWait - timeSinceLastInvoke)
  10882. : timeWaiting;
  10883. }
  10884. function shouldInvoke(time) {
  10885. var timeSinceLastCall = time - lastCallTime,
  10886. timeSinceLastInvoke = time - lastInvokeTime;
  10887. // Either this is the first call, activity has stopped and we're at the
  10888. // trailing edge, the system time has gone backwards and we're treating
  10889. // it as the trailing edge, or we've hit the `maxWait` limit.
  10890. return (lastCallTime === undefined || (timeSinceLastCall >= wait) ||
  10891. (timeSinceLastCall < 0) || (maxing && timeSinceLastInvoke >= maxWait));
  10892. }
  10893. function timerExpired() {
  10894. var time = now();
  10895. if (shouldInvoke(time)) {
  10896. return trailingEdge(time);
  10897. }
  10898. // Restart the timer.
  10899. timerId = setTimeout(timerExpired, remainingWait(time));
  10900. }
  10901. function trailingEdge(time) {
  10902. timerId = undefined;
  10903. // Only invoke if we have `lastArgs` which means `func` has been
  10904. // debounced at least once.
  10905. if (trailing && lastArgs) {
  10906. return invokeFunc(time);
  10907. }
  10908. lastArgs = lastThis = undefined;
  10909. return result;
  10910. }
  10911. function cancel() {
  10912. if (timerId !== undefined) {
  10913. clearTimeout(timerId);
  10914. }
  10915. lastInvokeTime = 0;
  10916. lastArgs = lastCallTime = lastThis = timerId = undefined;
  10917. }
  10918. function flush() {
  10919. return timerId === undefined ? result : trailingEdge(now());
  10920. }
  10921. function debounced() {
  10922. var time = now(),
  10923. isInvoking = shouldInvoke(time);
  10924. lastArgs = arguments;
  10925. lastThis = this;
  10926. lastCallTime = time;
  10927. if (isInvoking) {
  10928. if (timerId === undefined) {
  10929. return leadingEdge(lastCallTime);
  10930. }
  10931. if (maxing) {
  10932. // Handle invocations in a tight loop.
  10933. timerId = setTimeout(timerExpired, wait);
  10934. return invokeFunc(lastCallTime);
  10935. }
  10936. }
  10937. if (timerId === undefined) {
  10938. timerId = setTimeout(timerExpired, wait);
  10939. }
  10940. return result;
  10941. }
  10942. debounced.cancel = cancel;
  10943. debounced.flush = flush;
  10944. return debounced;
  10945. }
  10946. /**
  10947. * Defers invoking the `func` until the current call stack has cleared. Any
  10948. * additional arguments are provided to `func` when it's invoked.
  10949. *
  10950. * @static
  10951. * @memberOf _
  10952. * @since 0.1.0
  10953. * @category Function
  10954. * @param {Function} func The function to defer.
  10955. * @param {...*} [args] The arguments to invoke `func` with.
  10956. * @returns {number} Returns the timer id.
  10957. * @example
  10958. *
  10959. * _.defer(function(text) {
  10960. * console.log(text);
  10961. * }, 'deferred');
  10962. * // => Logs 'deferred' after one millisecond.
  10963. */
  10964. var defer = baseRest(function(func, args) {
  10965. return baseDelay(func, 1, args);
  10966. });
  10967. /**
  10968. * Invokes `func` after `wait` milliseconds. Any additional arguments are
  10969. * provided to `func` when it's invoked.
  10970. *
  10971. * @static
  10972. * @memberOf _
  10973. * @since 0.1.0
  10974. * @category Function
  10975. * @param {Function} func The function to delay.
  10976. * @param {number} wait The number of milliseconds to delay invocation.
  10977. * @param {...*} [args] The arguments to invoke `func` with.
  10978. * @returns {number} Returns the timer id.
  10979. * @example
  10980. *
  10981. * _.delay(function(text) {
  10982. * console.log(text);
  10983. * }, 1000, 'later');
  10984. * // => Logs 'later' after one second.
  10985. */
  10986. var delay = baseRest(function(func, wait, args) {
  10987. return baseDelay(func, toNumber(wait) || 0, args);
  10988. });
  10989. /**
  10990. * Creates a function that invokes `func` with arguments reversed.
  10991. *
  10992. * @static
  10993. * @memberOf _
  10994. * @since 4.0.0
  10995. * @category Function
  10996. * @param {Function} func The function to flip arguments for.
  10997. * @returns {Function} Returns the new flipped function.
  10998. * @example
  10999. *
  11000. * var flipped = _.flip(function() {
  11001. * return _.toArray(arguments);
  11002. * });
  11003. *
  11004. * flipped('a', 'b', 'c', 'd');
  11005. * // => ['d', 'c', 'b', 'a']
  11006. */
  11007. function flip(func) {
  11008. return createWrap(func, WRAP_FLIP_FLAG);
  11009. }
  11010. /**
  11011. * Creates a function that memoizes the result of `func`. If `resolver` is
  11012. * provided, it determines the cache key for storing the result based on the
  11013. * arguments provided to the memoized function. By default, the first argument
  11014. * provided to the memoized function is used as the map cache key. The `func`
  11015. * is invoked with the `this` binding of the memoized function.
  11016. *
  11017. * **Note:** The cache is exposed as the `cache` property on the memoized
  11018. * function. Its creation may be customized by replacing the `_.memoize.Cache`
  11019. * constructor with one whose instances implement the
  11020. * [`Map`](http://ecma-international.org/ecma-262/7.0/#sec-properties-of-the-map-prototype-object)
  11021. * method interface of `clear`, `delete`, `get`, `has`, and `set`.
  11022. *
  11023. * @static
  11024. * @memberOf _
  11025. * @since 0.1.0
  11026. * @category Function
  11027. * @param {Function} func The function to have its output memoized.
  11028. * @param {Function} [resolver] The function to resolve the cache key.
  11029. * @returns {Function} Returns the new memoized function.
  11030. * @example
  11031. *
  11032. * var object = { 'a': 1, 'b': 2 };
  11033. * var other = { 'c': 3, 'd': 4 };
  11034. *
  11035. * var values = _.memoize(_.values);
  11036. * values(object);
  11037. * // => [1, 2]
  11038. *
  11039. * values(other);
  11040. * // => [3, 4]
  11041. *
  11042. * object.a = 2;
  11043. * values(object);
  11044. * // => [1, 2]
  11045. *
  11046. * // Modify the result cache.
  11047. * values.cache.set(object, ['a', 'b']);
  11048. * values(object);
  11049. * // => ['a', 'b']
  11050. *
  11051. * // Replace `_.memoize.Cache`.
  11052. * _.memoize.Cache = WeakMap;
  11053. */
  11054. function memoize(func, resolver) {
  11055. if (typeof func != 'function' || (resolver != null && typeof resolver != 'function')) {
  11056. throw new TypeError(FUNC_ERROR_TEXT);
  11057. }
  11058. var memoized = function() {
  11059. var args = arguments,
  11060. key = resolver ? resolver.apply(this, args) : args[0],
  11061. cache = memoized.cache;
  11062. if (cache.has(key)) {
  11063. return cache.get(key);
  11064. }
  11065. var result = func.apply(this, args);
  11066. memoized.cache = cache.set(key, result) || cache;
  11067. return result;
  11068. };
  11069. memoized.cache = new (memoize.Cache || MapCache);
  11070. return memoized;
  11071. }
  11072. // Expose `MapCache`.
  11073. memoize.Cache = MapCache;
  11074. /**
  11075. * Creates a function that negates the result of the predicate `func`. The
  11076. * `func` predicate is invoked with the `this` binding and arguments of the
  11077. * created function.
  11078. *
  11079. * @static
  11080. * @memberOf _
  11081. * @since 3.0.0
  11082. * @category Function
  11083. * @param {Function} predicate The predicate to negate.
  11084. * @returns {Function} Returns the new negated function.
  11085. * @example
  11086. *
  11087. * function isEven(n) {
  11088. * return n % 2 == 0;
  11089. * }
  11090. *
  11091. * _.filter([1, 2, 3, 4, 5, 6], _.negate(isEven));
  11092. * // => [1, 3, 5]
  11093. */
  11094. function negate(predicate) {
  11095. if (typeof predicate != 'function') {
  11096. throw new TypeError(FUNC_ERROR_TEXT);
  11097. }
  11098. return function() {
  11099. var args = arguments;
  11100. switch (args.length) {
  11101. case 0: return !predicate.call(this);
  11102. case 1: return !predicate.call(this, args[0]);
  11103. case 2: return !predicate.call(this, args[0], args[1]);
  11104. case 3: return !predicate.call(this, args[0], args[1], args[2]);
  11105. }
  11106. return !predicate.apply(this, args);
  11107. };
  11108. }
  11109. /**
  11110. * Creates a function that is restricted to invoking `func` once. Repeat calls
  11111. * to the function return the value of the first invocation. The `func` is
  11112. * invoked with the `this` binding and arguments of the created function.
  11113. *
  11114. * @static
  11115. * @memberOf _
  11116. * @since 0.1.0
  11117. * @category Function
  11118. * @param {Function} func The function to restrict.
  11119. * @returns {Function} Returns the new restricted function.
  11120. * @example
  11121. *
  11122. * var initialize = _.once(createApplication);
  11123. * initialize();
  11124. * initialize();
  11125. * // => `createApplication` is invoked once
  11126. */
  11127. function once(func) {
  11128. return before(2, func);
  11129. }
  11130. /**
  11131. * Creates a function that invokes `func` with its arguments transformed.
  11132. *
  11133. * @static
  11134. * @since 4.0.0
  11135. * @memberOf _
  11136. * @category Function
  11137. * @param {Function} func The function to wrap.
  11138. * @param {...(Function|Function[])} [transforms=[_.identity]]
  11139. * The argument transforms.
  11140. * @returns {Function} Returns the new function.
  11141. * @example
  11142. *
  11143. * function doubled(n) {
  11144. * return n * 2;
  11145. * }
  11146. *
  11147. * function square(n) {
  11148. * return n * n;
  11149. * }
  11150. *
  11151. * var func = _.overArgs(function(x, y) {
  11152. * return [x, y];
  11153. * }, [square, doubled]);
  11154. *
  11155. * func(9, 3);
  11156. * // => [81, 6]
  11157. *
  11158. * func(10, 5);
  11159. * // => [100, 10]
  11160. */
  11161. var overArgs = castRest(function(func, transforms) {
  11162. transforms = (transforms.length == 1 && isArray(transforms[0]))
  11163. ? arrayMap(transforms[0], baseUnary(getIteratee()))
  11164. : arrayMap(baseFlatten(transforms, 1), baseUnary(getIteratee()));
  11165. var funcsLength = transforms.length;
  11166. return baseRest(function(args) {
  11167. var index = -1,
  11168. length = nativeMin(args.length, funcsLength);
  11169. while (++index < length) {
  11170. args[index] = transforms[index].call(this, args[index]);
  11171. }
  11172. return apply(func, this, args);
  11173. });
  11174. });
  11175. /**
  11176. * Creates a function that invokes `func` with `partials` prepended to the
  11177. * arguments it receives. This method is like `_.bind` except it does **not**
  11178. * alter the `this` binding.
  11179. *
  11180. * The `_.partial.placeholder` value, which defaults to `_` in monolithic
  11181. * builds, may be used as a placeholder for partially applied arguments.
  11182. *
  11183. * **Note:** This method doesn't set the "length" property of partially
  11184. * applied functions.
  11185. *
  11186. * @static
  11187. * @memberOf _
  11188. * @since 0.2.0
  11189. * @category Function
  11190. * @param {Function} func The function to partially apply arguments to.
  11191. * @param {...*} [partials] The arguments to be partially applied.
  11192. * @returns {Function} Returns the new partially applied function.
  11193. * @example
  11194. *
  11195. * function greet(greeting, name) {
  11196. * return greeting + ' ' + name;
  11197. * }
  11198. *
  11199. * var sayHelloTo = _.partial(greet, 'hello');
  11200. * sayHelloTo('fred');
  11201. * // => 'hello fred'
  11202. *
  11203. * // Partially applied with placeholders.
  11204. * var greetFred = _.partial(greet, _, 'fred');
  11205. * greetFred('hi');
  11206. * // => 'hi fred'
  11207. */
  11208. var partial = baseRest(function(func, partials) {
  11209. var holders = replaceHolders(partials, getHolder(partial));
  11210. return createWrap(func, WRAP_PARTIAL_FLAG, undefined, partials, holders);
  11211. });
  11212. /**
  11213. * This method is like `_.partial` except that partially applied arguments
  11214. * are appended to the arguments it receives.
  11215. *
  11216. * The `_.partialRight.placeholder` value, which defaults to `_` in monolithic
  11217. * builds, may be used as a placeholder for partially applied arguments.
  11218. *
  11219. * **Note:** This method doesn't set the "length" property of partially
  11220. * applied functions.
  11221. *
  11222. * @static
  11223. * @memberOf _
  11224. * @since 1.0.0
  11225. * @category Function
  11226. * @param {Function} func The function to partially apply arguments to.
  11227. * @param {...*} [partials] The arguments to be partially applied.
  11228. * @returns {Function} Returns the new partially applied function.
  11229. * @example
  11230. *
  11231. * function greet(greeting, name) {
  11232. * return greeting + ' ' + name;
  11233. * }
  11234. *
  11235. * var greetFred = _.partialRight(greet, 'fred');
  11236. * greetFred('hi');
  11237. * // => 'hi fred'
  11238. *
  11239. * // Partially applied with placeholders.
  11240. * var sayHelloTo = _.partialRight(greet, 'hello', _);
  11241. * sayHelloTo('fred');
  11242. * // => 'hello fred'
  11243. */
  11244. var partialRight = baseRest(function(func, partials) {
  11245. var holders = replaceHolders(partials, getHolder(partialRight));
  11246. return createWrap(func, WRAP_PARTIAL_RIGHT_FLAG, undefined, partials, holders);
  11247. });
  11248. /**
  11249. * Creates a function that invokes `func` with arguments arranged according
  11250. * to the specified `indexes` where the argument value at the first index is
  11251. * provided as the first argument, the argument value at the second index is
  11252. * provided as the second argument, and so on.
  11253. *
  11254. * @static
  11255. * @memberOf _
  11256. * @since 3.0.0
  11257. * @category Function
  11258. * @param {Function} func The function to rearrange arguments for.
  11259. * @param {...(number|number[])} indexes The arranged argument indexes.
  11260. * @returns {Function} Returns the new function.
  11261. * @example
  11262. *
  11263. * var rearged = _.rearg(function(a, b, c) {
  11264. * return [a, b, c];
  11265. * }, [2, 0, 1]);
  11266. *
  11267. * rearged('b', 'c', 'a')
  11268. * // => ['a', 'b', 'c']
  11269. */
  11270. var rearg = flatRest(function(func, indexes) {
  11271. return createWrap(func, WRAP_REARG_FLAG, undefined, undefined, undefined, indexes);
  11272. });
  11273. /**
  11274. * Creates a function that invokes `func` with the `this` binding of the
  11275. * created function and arguments from `start` and beyond provided as
  11276. * an array.
  11277. *
  11278. * **Note:** This method is based on the
  11279. * [rest parameter](https://mdn.io/rest_parameters).
  11280. *
  11281. * @static
  11282. * @memberOf _
  11283. * @since 4.0.0
  11284. * @category Function
  11285. * @param {Function} func The function to apply a rest parameter to.
  11286. * @param {number} [start=func.length-1] The start position of the rest parameter.
  11287. * @returns {Function} Returns the new function.
  11288. * @example
  11289. *
  11290. * var say = _.rest(function(what, names) {
  11291. * return what + ' ' + _.initial(names).join(', ') +
  11292. * (_.size(names) > 1 ? ', & ' : '') + _.last(names);
  11293. * });
  11294. *
  11295. * say('hello', 'fred', 'barney', 'pebbles');
  11296. * // => 'hello fred, barney, & pebbles'
  11297. */
  11298. function rest(func, start) {
  11299. if (typeof func != 'function') {
  11300. throw new TypeError(FUNC_ERROR_TEXT);
  11301. }
  11302. start = start === undefined ? start : toInteger(start);
  11303. return baseRest(func, start);
  11304. }
  11305. /**
  11306. * Creates a function that invokes `func` with the `this` binding of the
  11307. * create function and an array of arguments much like
  11308. * [`Function#apply`](http://www.ecma-international.org/ecma-262/7.0/#sec-function.prototype.apply).
  11309. *
  11310. * **Note:** This method is based on the
  11311. * [spread operator](https://mdn.io/spread_operator).
  11312. *
  11313. * @static
  11314. * @memberOf _
  11315. * @since 3.2.0
  11316. * @category Function
  11317. * @param {Function} func The function to spread arguments over.
  11318. * @param {number} [start=0] The start position of the spread.
  11319. * @returns {Function} Returns the new function.
  11320. * @example
  11321. *
  11322. * var say = _.spread(function(who, what) {
  11323. * return who + ' says ' + what;
  11324. * });
  11325. *
  11326. * say(['fred', 'hello']);
  11327. * // => 'fred says hello'
  11328. *
  11329. * var numbers = Promise.all([
  11330. * Promise.resolve(40),
  11331. * Promise.resolve(36)
  11332. * ]);
  11333. *
  11334. * numbers.then(_.spread(function(x, y) {
  11335. * return x + y;
  11336. * }));
  11337. * // => a Promise of 76
  11338. */
  11339. function spread(func, start) {
  11340. if (typeof func != 'function') {
  11341. throw new TypeError(FUNC_ERROR_TEXT);
  11342. }
  11343. start = start == null ? 0 : nativeMax(toInteger(start), 0);
  11344. return baseRest(function(args) {
  11345. var array = args[start],
  11346. otherArgs = castSlice(args, 0, start);
  11347. if (array) {
  11348. arrayPush(otherArgs, array);
  11349. }
  11350. return apply(func, this, otherArgs);
  11351. });
  11352. }
  11353. /**
  11354. * Creates a throttled function that only invokes `func` at most once per
  11355. * every `wait` milliseconds. The throttled function comes with a `cancel`
  11356. * method to cancel delayed `func` invocations and a `flush` method to
  11357. * immediately invoke them. Provide `options` to indicate whether `func`
  11358. * should be invoked on the leading and/or trailing edge of the `wait`
  11359. * timeout. The `func` is invoked with the last arguments provided to the
  11360. * throttled function. Subsequent calls to the throttled function return the
  11361. * result of the last `func` invocation.
  11362. *
  11363. * **Note:** If `leading` and `trailing` options are `true`, `func` is
  11364. * invoked on the trailing edge of the timeout only if the throttled function
  11365. * is invoked more than once during the `wait` timeout.
  11366. *
  11367. * If `wait` is `0` and `leading` is `false`, `func` invocation is deferred
  11368. * until to the next tick, similar to `setTimeout` with a timeout of `0`.
  11369. *
  11370. * See [David Corbacho's article](https://css-tricks.com/debouncing-throttling-explained-examples/)
  11371. * for details over the differences between `_.throttle` and `_.debounce`.
  11372. *
  11373. * @static
  11374. * @memberOf _
  11375. * @since 0.1.0
  11376. * @category Function
  11377. * @param {Function} func The function to throttle.
  11378. * @param {number} [wait=0] The number of milliseconds to throttle invocations to.
  11379. * @param {Object} [options={}] The options object.
  11380. * @param {boolean} [options.leading=true]
  11381. * Specify invoking on the leading edge of the timeout.
  11382. * @param {boolean} [options.trailing=true]
  11383. * Specify invoking on the trailing edge of the timeout.
  11384. * @returns {Function} Returns the new throttled function.
  11385. * @example
  11386. *
  11387. * // Avoid excessively updating the position while scrolling.
  11388. * jQuery(window).on('scroll', _.throttle(updatePosition, 100));
  11389. *
  11390. * // Invoke `renewToken` when the click event is fired, but not more than once every 5 minutes.
  11391. * var throttled = _.throttle(renewToken, 300000, { 'trailing': false });
  11392. * jQuery(element).on('click', throttled);
  11393. *
  11394. * // Cancel the trailing throttled invocation.
  11395. * jQuery(window).on('popstate', throttled.cancel);
  11396. */
  11397. function throttle(func, wait, options) {
  11398. var leading = true,
  11399. trailing = true;
  11400. if (typeof func != 'function') {
  11401. throw new TypeError(FUNC_ERROR_TEXT);
  11402. }
  11403. if (isObject(options)) {
  11404. leading = 'leading' in options ? !!options.leading : leading;
  11405. trailing = 'trailing' in options ? !!options.trailing : trailing;
  11406. }
  11407. return debounce(func, wait, {
  11408. 'leading': leading,
  11409. 'maxWait': wait,
  11410. 'trailing': trailing
  11411. });
  11412. }
  11413. /**
  11414. * Creates a function that accepts up to one argument, ignoring any
  11415. * additional arguments.
  11416. *
  11417. * @static
  11418. * @memberOf _
  11419. * @since 4.0.0
  11420. * @category Function
  11421. * @param {Function} func The function to cap arguments for.
  11422. * @returns {Function} Returns the new capped function.
  11423. * @example
  11424. *
  11425. * _.map(['6', '8', '10'], _.unary(parseInt));
  11426. * // => [6, 8, 10]
  11427. */
  11428. function unary(func) {
  11429. return ary(func, 1);
  11430. }
  11431. /**
  11432. * Creates a function that provides `value` to `wrapper` as its first
  11433. * argument. Any additional arguments provided to the function are appended
  11434. * to those provided to the `wrapper`. The wrapper is invoked with the `this`
  11435. * binding of the created function.
  11436. *
  11437. * @static
  11438. * @memberOf _
  11439. * @since 0.1.0
  11440. * @category Function
  11441. * @param {*} value The value to wrap.
  11442. * @param {Function} [wrapper=identity] The wrapper function.
  11443. * @returns {Function} Returns the new function.
  11444. * @example
  11445. *
  11446. * var p = _.wrap(_.escape, function(func, text) {
  11447. * return '<p>' + func(text) + '</p>';
  11448. * });
  11449. *
  11450. * p('fred, barney, & pebbles');
  11451. * // => '<p>fred, barney, &amp; pebbles</p>'
  11452. */
  11453. function wrap(value, wrapper) {
  11454. return partial(castFunction(wrapper), value);
  11455. }
  11456. /*------------------------------------------------------------------------*/
  11457. /**
  11458. * Casts `value` as an array if it's not one.
  11459. *
  11460. * @static
  11461. * @memberOf _
  11462. * @since 4.4.0
  11463. * @category Lang
  11464. * @param {*} value The value to inspect.
  11465. * @returns {Array} Returns the cast array.
  11466. * @example
  11467. *
  11468. * _.castArray(1);
  11469. * // => [1]
  11470. *
  11471. * _.castArray({ 'a': 1 });
  11472. * // => [{ 'a': 1 }]
  11473. *
  11474. * _.castArray('abc');
  11475. * // => ['abc']
  11476. *
  11477. * _.castArray(null);
  11478. * // => [null]
  11479. *
  11480. * _.castArray(undefined);
  11481. * // => [undefined]
  11482. *
  11483. * _.castArray();
  11484. * // => []
  11485. *
  11486. * var array = [1, 2, 3];
  11487. * console.log(_.castArray(array) === array);
  11488. * // => true
  11489. */
  11490. function castArray() {
  11491. if (!arguments.length) {
  11492. return [];
  11493. }
  11494. var value = arguments[0];
  11495. return isArray(value) ? value : [value];
  11496. }
  11497. /**
  11498. * Creates a shallow clone of `value`.
  11499. *
  11500. * **Note:** This method is loosely based on the
  11501. * [structured clone algorithm](https://mdn.io/Structured_clone_algorithm)
  11502. * and supports cloning arrays, array buffers, booleans, date objects, maps,
  11503. * numbers, `Object` objects, regexes, sets, strings, symbols, and typed
  11504. * arrays. The own enumerable properties of `arguments` objects are cloned
  11505. * as plain objects. An empty object is returned for uncloneable values such
  11506. * as error objects, functions, DOM nodes, and WeakMaps.
  11507. *
  11508. * @static
  11509. * @memberOf _
  11510. * @since 0.1.0
  11511. * @category Lang
  11512. * @param {*} value The value to clone.
  11513. * @returns {*} Returns the cloned value.
  11514. * @see _.cloneDeep
  11515. * @example
  11516. *
  11517. * var objects = [{ 'a': 1 }, { 'b': 2 }];
  11518. *
  11519. * var shallow = _.clone(objects);
  11520. * console.log(shallow[0] === objects[0]);
  11521. * // => true
  11522. */
  11523. function clone(value) {
  11524. return baseClone(value, CLONE_SYMBOLS_FLAG);
  11525. }
  11526. /**
  11527. * This method is like `_.clone` except that it accepts `customizer` which
  11528. * is invoked to produce the cloned value. If `customizer` returns `undefined`,
  11529. * cloning is handled by the method instead. The `customizer` is invoked with
  11530. * up to four arguments; (value [, index|key, object, stack]).
  11531. *
  11532. * @static
  11533. * @memberOf _
  11534. * @since 4.0.0
  11535. * @category Lang
  11536. * @param {*} value The value to clone.
  11537. * @param {Function} [customizer] The function to customize cloning.
  11538. * @returns {*} Returns the cloned value.
  11539. * @see _.cloneDeepWith
  11540. * @example
  11541. *
  11542. * function customizer(value) {
  11543. * if (_.isElement(value)) {
  11544. * return value.cloneNode(false);
  11545. * }
  11546. * }
  11547. *
  11548. * var el = _.cloneWith(document.body, customizer);
  11549. *
  11550. * console.log(el === document.body);
  11551. * // => false
  11552. * console.log(el.nodeName);
  11553. * // => 'BODY'
  11554. * console.log(el.childNodes.length);
  11555. * // => 0
  11556. */
  11557. function cloneWith(value, customizer) {
  11558. customizer = typeof customizer == 'function' ? customizer : undefined;
  11559. return baseClone(value, CLONE_SYMBOLS_FLAG, customizer);
  11560. }
  11561. /**
  11562. * This method is like `_.clone` except that it recursively clones `value`.
  11563. *
  11564. * @static
  11565. * @memberOf _
  11566. * @since 1.0.0
  11567. * @category Lang
  11568. * @param {*} value The value to recursively clone.
  11569. * @returns {*} Returns the deep cloned value.
  11570. * @see _.clone
  11571. * @example
  11572. *
  11573. * var objects = [{ 'a': 1 }, { 'b': 2 }];
  11574. *
  11575. * var deep = _.cloneDeep(objects);
  11576. * console.log(deep[0] === objects[0]);
  11577. * // => false
  11578. */
  11579. function cloneDeep(value) {
  11580. return baseClone(value, CLONE_DEEP_FLAG | CLONE_SYMBOLS_FLAG);
  11581. }
  11582. /**
  11583. * This method is like `_.cloneWith` except that it recursively clones `value`.
  11584. *
  11585. * @static
  11586. * @memberOf _
  11587. * @since 4.0.0
  11588. * @category Lang
  11589. * @param {*} value The value to recursively clone.
  11590. * @param {Function} [customizer] The function to customize cloning.
  11591. * @returns {*} Returns the deep cloned value.
  11592. * @see _.cloneWith
  11593. * @example
  11594. *
  11595. * function customizer(value) {
  11596. * if (_.isElement(value)) {
  11597. * return value.cloneNode(true);
  11598. * }
  11599. * }
  11600. *
  11601. * var el = _.cloneDeepWith(document.body, customizer);
  11602. *
  11603. * console.log(el === document.body);
  11604. * // => false
  11605. * console.log(el.nodeName);
  11606. * // => 'BODY'
  11607. * console.log(el.childNodes.length);
  11608. * // => 20
  11609. */
  11610. function cloneDeepWith(value, customizer) {
  11611. customizer = typeof customizer == 'function' ? customizer : undefined;
  11612. return baseClone(value, CLONE_DEEP_FLAG | CLONE_SYMBOLS_FLAG, customizer);
  11613. }
  11614. /**
  11615. * Checks if `object` conforms to `source` by invoking the predicate
  11616. * properties of `source` with the corresponding property values of `object`.
  11617. *
  11618. * **Note:** This method is equivalent to `_.conforms` when `source` is
  11619. * partially applied.
  11620. *
  11621. * @static
  11622. * @memberOf _
  11623. * @since 4.14.0
  11624. * @category Lang
  11625. * @param {Object} object The object to inspect.
  11626. * @param {Object} source The object of property predicates to conform to.
  11627. * @returns {boolean} Returns `true` if `object` conforms, else `false`.
  11628. * @example
  11629. *
  11630. * var object = { 'a': 1, 'b': 2 };
  11631. *
  11632. * _.conformsTo(object, { 'b': function(n) { return n > 1; } });
  11633. * // => true
  11634. *
  11635. * _.conformsTo(object, { 'b': function(n) { return n > 2; } });
  11636. * // => false
  11637. */
  11638. function conformsTo(object, source) {
  11639. return source == null || baseConformsTo(object, source, keys(source));
  11640. }
  11641. /**
  11642. * Performs a
  11643. * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
  11644. * comparison between two values to determine if they are equivalent.
  11645. *
  11646. * @static
  11647. * @memberOf _
  11648. * @since 4.0.0
  11649. * @category Lang
  11650. * @param {*} value The value to compare.
  11651. * @param {*} other The other value to compare.
  11652. * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
  11653. * @example
  11654. *
  11655. * var object = { 'a': 1 };
  11656. * var other = { 'a': 1 };
  11657. *
  11658. * _.eq(object, object);
  11659. * // => true
  11660. *
  11661. * _.eq(object, other);
  11662. * // => false
  11663. *
  11664. * _.eq('a', 'a');
  11665. * // => true
  11666. *
  11667. * _.eq('a', Object('a'));
  11668. * // => false
  11669. *
  11670. * _.eq(NaN, NaN);
  11671. * // => true
  11672. */
  11673. function eq(value, other) {
  11674. return value === other || (value !== value && other !== other);
  11675. }
  11676. /**
  11677. * Checks if `value` is greater than `other`.
  11678. *
  11679. * @static
  11680. * @memberOf _
  11681. * @since 3.9.0
  11682. * @category Lang
  11683. * @param {*} value The value to compare.
  11684. * @param {*} other The other value to compare.
  11685. * @returns {boolean} Returns `true` if `value` is greater than `other`,
  11686. * else `false`.
  11687. * @see _.lt
  11688. * @example
  11689. *
  11690. * _.gt(3, 1);
  11691. * // => true
  11692. *
  11693. * _.gt(3, 3);
  11694. * // => false
  11695. *
  11696. * _.gt(1, 3);
  11697. * // => false
  11698. */
  11699. var gt = createRelationalOperation(baseGt);
  11700. /**
  11701. * Checks if `value` is greater than or equal to `other`.
  11702. *
  11703. * @static
  11704. * @memberOf _
  11705. * @since 3.9.0
  11706. * @category Lang
  11707. * @param {*} value The value to compare.
  11708. * @param {*} other The other value to compare.
  11709. * @returns {boolean} Returns `true` if `value` is greater than or equal to
  11710. * `other`, else `false`.
  11711. * @see _.lte
  11712. * @example
  11713. *
  11714. * _.gte(3, 1);
  11715. * // => true
  11716. *
  11717. * _.gte(3, 3);
  11718. * // => true
  11719. *
  11720. * _.gte(1, 3);
  11721. * // => false
  11722. */
  11723. var gte = createRelationalOperation(function(value, other) {
  11724. return value >= other;
  11725. });
  11726. /**
  11727. * Checks if `value` is likely an `arguments` object.
  11728. *
  11729. * @static
  11730. * @memberOf _
  11731. * @since 0.1.0
  11732. * @category Lang
  11733. * @param {*} value The value to check.
  11734. * @returns {boolean} Returns `true` if `value` is an `arguments` object,
  11735. * else `false`.
  11736. * @example
  11737. *
  11738. * _.isArguments(function() { return arguments; }());
  11739. * // => true
  11740. *
  11741. * _.isArguments([1, 2, 3]);
  11742. * // => false
  11743. */
  11744. var isArguments = baseIsArguments(function() { return arguments; }()) ? baseIsArguments : function(value) {
  11745. return isObjectLike(value) && hasOwnProperty.call(value, 'callee') &&
  11746. !propertyIsEnumerable.call(value, 'callee');
  11747. };
  11748. /**
  11749. * Checks if `value` is classified as an `Array` object.
  11750. *
  11751. * @static
  11752. * @memberOf _
  11753. * @since 0.1.0
  11754. * @category Lang
  11755. * @param {*} value The value to check.
  11756. * @returns {boolean} Returns `true` if `value` is an array, else `false`.
  11757. * @example
  11758. *
  11759. * _.isArray([1, 2, 3]);
  11760. * // => true
  11761. *
  11762. * _.isArray(document.body.children);
  11763. * // => false
  11764. *
  11765. * _.isArray('abc');
  11766. * // => false
  11767. *
  11768. * _.isArray(_.noop);
  11769. * // => false
  11770. */
  11771. var isArray = Array.isArray;
  11772. /**
  11773. * Checks if `value` is classified as an `ArrayBuffer` object.
  11774. *
  11775. * @static
  11776. * @memberOf _
  11777. * @since 4.3.0
  11778. * @category Lang
  11779. * @param {*} value The value to check.
  11780. * @returns {boolean} Returns `true` if `value` is an array buffer, else `false`.
  11781. * @example
  11782. *
  11783. * _.isArrayBuffer(new ArrayBuffer(2));
  11784. * // => true
  11785. *
  11786. * _.isArrayBuffer(new Array(2));
  11787. * // => false
  11788. */
  11789. var isArrayBuffer = nodeIsArrayBuffer ? baseUnary(nodeIsArrayBuffer) : baseIsArrayBuffer;
  11790. /**
  11791. * Checks if `value` is array-like. A value is considered array-like if it's
  11792. * not a function and has a `value.length` that's an integer greater than or
  11793. * equal to `0` and less than or equal to `Number.MAX_SAFE_INTEGER`.
  11794. *
  11795. * @static
  11796. * @memberOf _
  11797. * @since 4.0.0
  11798. * @category Lang
  11799. * @param {*} value The value to check.
  11800. * @returns {boolean} Returns `true` if `value` is array-like, else `false`.
  11801. * @example
  11802. *
  11803. * _.isArrayLike([1, 2, 3]);
  11804. * // => true
  11805. *
  11806. * _.isArrayLike(document.body.children);
  11807. * // => true
  11808. *
  11809. * _.isArrayLike('abc');
  11810. * // => true
  11811. *
  11812. * _.isArrayLike(_.noop);
  11813. * // => false
  11814. */
  11815. function isArrayLike(value) {
  11816. return value != null && isLength(value.length) && !isFunction(value);
  11817. }
  11818. /**
  11819. * This method is like `_.isArrayLike` except that it also checks if `value`
  11820. * is an object.
  11821. *
  11822. * @static
  11823. * @memberOf _
  11824. * @since 4.0.0
  11825. * @category Lang
  11826. * @param {*} value The value to check.
  11827. * @returns {boolean} Returns `true` if `value` is an array-like object,
  11828. * else `false`.
  11829. * @example
  11830. *
  11831. * _.isArrayLikeObject([1, 2, 3]);
  11832. * // => true
  11833. *
  11834. * _.isArrayLikeObject(document.body.children);
  11835. * // => true
  11836. *
  11837. * _.isArrayLikeObject('abc');
  11838. * // => false
  11839. *
  11840. * _.isArrayLikeObject(_.noop);
  11841. * // => false
  11842. */
  11843. function isArrayLikeObject(value) {
  11844. return isObjectLike(value) && isArrayLike(value);
  11845. }
  11846. /**
  11847. * Checks if `value` is classified as a boolean primitive or object.
  11848. *
  11849. * @static
  11850. * @memberOf _
  11851. * @since 0.1.0
  11852. * @category Lang
  11853. * @param {*} value The value to check.
  11854. * @returns {boolean} Returns `true` if `value` is a boolean, else `false`.
  11855. * @example
  11856. *
  11857. * _.isBoolean(false);
  11858. * // => true
  11859. *
  11860. * _.isBoolean(null);
  11861. * // => false
  11862. */
  11863. function isBoolean(value) {
  11864. return value === true || value === false ||
  11865. (isObjectLike(value) && baseGetTag(value) == boolTag);
  11866. }
  11867. /**
  11868. * Checks if `value` is a buffer.
  11869. *
  11870. * @static
  11871. * @memberOf _
  11872. * @since 4.3.0
  11873. * @category Lang
  11874. * @param {*} value The value to check.
  11875. * @returns {boolean} Returns `true` if `value` is a buffer, else `false`.
  11876. * @example
  11877. *
  11878. * _.isBuffer(new Buffer(2));
  11879. * // => true
  11880. *
  11881. * _.isBuffer(new Uint8Array(2));
  11882. * // => false
  11883. */
  11884. var isBuffer = nativeIsBuffer || stubFalse;
  11885. /**
  11886. * Checks if `value` is classified as a `Date` object.
  11887. *
  11888. * @static
  11889. * @memberOf _
  11890. * @since 0.1.0
  11891. * @category Lang
  11892. * @param {*} value The value to check.
  11893. * @returns {boolean} Returns `true` if `value` is a date object, else `false`.
  11894. * @example
  11895. *
  11896. * _.isDate(new Date);
  11897. * // => true
  11898. *
  11899. * _.isDate('Mon April 23 2012');
  11900. * // => false
  11901. */
  11902. var isDate = nodeIsDate ? baseUnary(nodeIsDate) : baseIsDate;
  11903. /**
  11904. * Checks if `value` is likely a DOM element.
  11905. *
  11906. * @static
  11907. * @memberOf _
  11908. * @since 0.1.0
  11909. * @category Lang
  11910. * @param {*} value The value to check.
  11911. * @returns {boolean} Returns `true` if `value` is a DOM element, else `false`.
  11912. * @example
  11913. *
  11914. * _.isElement(document.body);
  11915. * // => true
  11916. *
  11917. * _.isElement('<body>');
  11918. * // => false
  11919. */
  11920. function isElement(value) {
  11921. return isObjectLike(value) && value.nodeType === 1 && !isPlainObject(value);
  11922. }
  11923. /**
  11924. * Checks if `value` is an empty object, collection, map, or set.
  11925. *
  11926. * Objects are considered empty if they have no own enumerable string keyed
  11927. * properties.
  11928. *
  11929. * Array-like values such as `arguments` objects, arrays, buffers, strings, or
  11930. * jQuery-like collections are considered empty if they have a `length` of `0`.
  11931. * Similarly, maps and sets are considered empty if they have a `size` of `0`.
  11932. *
  11933. * @static
  11934. * @memberOf _
  11935. * @since 0.1.0
  11936. * @category Lang
  11937. * @param {*} value The value to check.
  11938. * @returns {boolean} Returns `true` if `value` is empty, else `false`.
  11939. * @example
  11940. *
  11941. * _.isEmpty(null);
  11942. * // => true
  11943. *
  11944. * _.isEmpty(true);
  11945. * // => true
  11946. *
  11947. * _.isEmpty(1);
  11948. * // => true
  11949. *
  11950. * _.isEmpty([1, 2, 3]);
  11951. * // => false
  11952. *
  11953. * _.isEmpty({ 'a': 1 });
  11954. * // => false
  11955. */
  11956. function isEmpty(value) {
  11957. if (value == null) {
  11958. return true;
  11959. }
  11960. if (isArrayLike(value) &&
  11961. (isArray(value) || typeof value == 'string' || typeof value.splice == 'function' ||
  11962. isBuffer(value) || isTypedArray(value) || isArguments(value))) {
  11963. return !value.length;
  11964. }
  11965. var tag = getTag(value);
  11966. if (tag == mapTag || tag == setTag) {
  11967. return !value.size;
  11968. }
  11969. if (isPrototype(value)) {
  11970. return !baseKeys(value).length;
  11971. }
  11972. for (var key in value) {
  11973. if (hasOwnProperty.call(value, key)) {
  11974. return false;
  11975. }
  11976. }
  11977. return true;
  11978. }
  11979. /**
  11980. * Performs a deep comparison between two values to determine if they are
  11981. * equivalent.
  11982. *
  11983. * **Note:** This method supports comparing arrays, array buffers, booleans,
  11984. * date objects, error objects, maps, numbers, `Object` objects, regexes,
  11985. * sets, strings, symbols, and typed arrays. `Object` objects are compared
  11986. * by their own, not inherited, enumerable properties. Functions and DOM
  11987. * nodes are compared by strict equality, i.e. `===`.
  11988. *
  11989. * @static
  11990. * @memberOf _
  11991. * @since 0.1.0
  11992. * @category Lang
  11993. * @param {*} value The value to compare.
  11994. * @param {*} other The other value to compare.
  11995. * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
  11996. * @example
  11997. *
  11998. * var object = { 'a': 1 };
  11999. * var other = { 'a': 1 };
  12000. *
  12001. * _.isEqual(object, other);
  12002. * // => true
  12003. *
  12004. * object === other;
  12005. * // => false
  12006. */
  12007. function isEqual(value, other) {
  12008. return baseIsEqual(value, other);
  12009. }
  12010. /**
  12011. * This method is like `_.isEqual` except that it accepts `customizer` which
  12012. * is invoked to compare values. If `customizer` returns `undefined`, comparisons
  12013. * are handled by the method instead. The `customizer` is invoked with up to
  12014. * six arguments: (objValue, othValue [, index|key, object, other, stack]).
  12015. *
  12016. * @static
  12017. * @memberOf _
  12018. * @since 4.0.0
  12019. * @category Lang
  12020. * @param {*} value The value to compare.
  12021. * @param {*} other The other value to compare.
  12022. * @param {Function} [customizer] The function to customize comparisons.
  12023. * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
  12024. * @example
  12025. *
  12026. * function isGreeting(value) {
  12027. * return /^h(?:i|ello)$/.test(value);
  12028. * }
  12029. *
  12030. * function customizer(objValue, othValue) {
  12031. * if (isGreeting(objValue) && isGreeting(othValue)) {
  12032. * return true;
  12033. * }
  12034. * }
  12035. *
  12036. * var array = ['hello', 'goodbye'];
  12037. * var other = ['hi', 'goodbye'];
  12038. *
  12039. * _.isEqualWith(array, other, customizer);
  12040. * // => true
  12041. */
  12042. function isEqualWith(value, other, customizer) {
  12043. customizer = typeof customizer == 'function' ? customizer : undefined;
  12044. var result = customizer ? customizer(value, other) : undefined;
  12045. return result === undefined ? baseIsEqual(value, other, undefined, customizer) : !!result;
  12046. }
  12047. /**
  12048. * Checks if `value` is an `Error`, `EvalError`, `RangeError`, `ReferenceError`,
  12049. * `SyntaxError`, `TypeError`, or `URIError` object.
  12050. *
  12051. * @static
  12052. * @memberOf _
  12053. * @since 3.0.0
  12054. * @category Lang
  12055. * @param {*} value The value to check.
  12056. * @returns {boolean} Returns `true` if `value` is an error object, else `false`.
  12057. * @example
  12058. *
  12059. * _.isError(new Error);
  12060. * // => true
  12061. *
  12062. * _.isError(Error);
  12063. * // => false
  12064. */
  12065. function isError(value) {
  12066. if (!isObjectLike(value)) {
  12067. return false;
  12068. }
  12069. var tag = baseGetTag(value);
  12070. return tag == errorTag || tag == domExcTag ||
  12071. (typeof value.message == 'string' && typeof value.name == 'string' && !isPlainObject(value));
  12072. }
  12073. /**
  12074. * Checks if `value` is a finite primitive number.
  12075. *
  12076. * **Note:** This method is based on
  12077. * [`Number.isFinite`](https://mdn.io/Number/isFinite).
  12078. *
  12079. * @static
  12080. * @memberOf _
  12081. * @since 0.1.0
  12082. * @category Lang
  12083. * @param {*} value The value to check.
  12084. * @returns {boolean} Returns `true` if `value` is a finite number, else `false`.
  12085. * @example
  12086. *
  12087. * _.isFinite(3);
  12088. * // => true
  12089. *
  12090. * _.isFinite(Number.MIN_VALUE);
  12091. * // => true
  12092. *
  12093. * _.isFinite(Infinity);
  12094. * // => false
  12095. *
  12096. * _.isFinite('3');
  12097. * // => false
  12098. */
  12099. function isFinite(value) {
  12100. return typeof value == 'number' && nativeIsFinite(value);
  12101. }
  12102. /**
  12103. * Checks if `value` is classified as a `Function` object.
  12104. *
  12105. * @static
  12106. * @memberOf _
  12107. * @since 0.1.0
  12108. * @category Lang
  12109. * @param {*} value The value to check.
  12110. * @returns {boolean} Returns `true` if `value` is a function, else `false`.
  12111. * @example
  12112. *
  12113. * _.isFunction(_);
  12114. * // => true
  12115. *
  12116. * _.isFunction(/abc/);
  12117. * // => false
  12118. */
  12119. function isFunction(value) {
  12120. if (!isObject(value)) {
  12121. return false;
  12122. }
  12123. // The use of `Object#toString` avoids issues with the `typeof` operator
  12124. // in Safari 9 which returns 'object' for typed arrays and other constructors.
  12125. var tag = baseGetTag(value);
  12126. return tag == funcTag || tag == genTag || tag == asyncTag || tag == proxyTag;
  12127. }
  12128. /**
  12129. * Checks if `value` is an integer.
  12130. *
  12131. * **Note:** This method is based on
  12132. * [`Number.isInteger`](https://mdn.io/Number/isInteger).
  12133. *
  12134. * @static
  12135. * @memberOf _
  12136. * @since 4.0.0
  12137. * @category Lang
  12138. * @param {*} value The value to check.
  12139. * @returns {boolean} Returns `true` if `value` is an integer, else `false`.
  12140. * @example
  12141. *
  12142. * _.isInteger(3);
  12143. * // => true
  12144. *
  12145. * _.isInteger(Number.MIN_VALUE);
  12146. * // => false
  12147. *
  12148. * _.isInteger(Infinity);
  12149. * // => false
  12150. *
  12151. * _.isInteger('3');
  12152. * // => false
  12153. */
  12154. function isInteger(value) {
  12155. return typeof value == 'number' && value == toInteger(value);
  12156. }
  12157. /**
  12158. * Checks if `value` is a valid array-like length.
  12159. *
  12160. * **Note:** This method is loosely based on
  12161. * [`ToLength`](http://ecma-international.org/ecma-262/7.0/#sec-tolength).
  12162. *
  12163. * @static
  12164. * @memberOf _
  12165. * @since 4.0.0
  12166. * @category Lang
  12167. * @param {*} value The value to check.
  12168. * @returns {boolean} Returns `true` if `value` is a valid length, else `false`.
  12169. * @example
  12170. *
  12171. * _.isLength(3);
  12172. * // => true
  12173. *
  12174. * _.isLength(Number.MIN_VALUE);
  12175. * // => false
  12176. *
  12177. * _.isLength(Infinity);
  12178. * // => false
  12179. *
  12180. * _.isLength('3');
  12181. * // => false
  12182. */
  12183. function isLength(value) {
  12184. return typeof value == 'number' &&
  12185. value > -1 && value % 1 == 0 && value <= MAX_SAFE_INTEGER;
  12186. }
  12187. /**
  12188. * Checks if `value` is the
  12189. * [language type](http://www.ecma-international.org/ecma-262/7.0/#sec-ecmascript-language-types)
  12190. * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
  12191. *
  12192. * @static
  12193. * @memberOf _
  12194. * @since 0.1.0
  12195. * @category Lang
  12196. * @param {*} value The value to check.
  12197. * @returns {boolean} Returns `true` if `value` is an object, else `false`.
  12198. * @example
  12199. *
  12200. * _.isObject({});
  12201. * // => true
  12202. *
  12203. * _.isObject([1, 2, 3]);
  12204. * // => true
  12205. *
  12206. * _.isObject(_.noop);
  12207. * // => true
  12208. *
  12209. * _.isObject(null);
  12210. * // => false
  12211. */
  12212. function isObject(value) {
  12213. var type = typeof value;
  12214. return value != null && (type == 'object' || type == 'function');
  12215. }
  12216. /**
  12217. * Checks if `value` is object-like. A value is object-like if it's not `null`
  12218. * and has a `typeof` result of "object".
  12219. *
  12220. * @static
  12221. * @memberOf _
  12222. * @since 4.0.0
  12223. * @category Lang
  12224. * @param {*} value The value to check.
  12225. * @returns {boolean} Returns `true` if `value` is object-like, else `false`.
  12226. * @example
  12227. *
  12228. * _.isObjectLike({});
  12229. * // => true
  12230. *
  12231. * _.isObjectLike([1, 2, 3]);
  12232. * // => true
  12233. *
  12234. * _.isObjectLike(_.noop);
  12235. * // => false
  12236. *
  12237. * _.isObjectLike(null);
  12238. * // => false
  12239. */
  12240. function isObjectLike(value) {
  12241. return value != null && typeof value == 'object';
  12242. }
  12243. /**
  12244. * Checks if `value` is classified as a `Map` object.
  12245. *
  12246. * @static
  12247. * @memberOf _
  12248. * @since 4.3.0
  12249. * @category Lang
  12250. * @param {*} value The value to check.
  12251. * @returns {boolean} Returns `true` if `value` is a map, else `false`.
  12252. * @example
  12253. *
  12254. * _.isMap(new Map);
  12255. * // => true
  12256. *
  12257. * _.isMap(new WeakMap);
  12258. * // => false
  12259. */
  12260. var isMap = nodeIsMap ? baseUnary(nodeIsMap) : baseIsMap;
  12261. /**
  12262. * Performs a partial deep comparison between `object` and `source` to
  12263. * determine if `object` contains equivalent property values.
  12264. *
  12265. * **Note:** This method is equivalent to `_.matches` when `source` is
  12266. * partially applied.
  12267. *
  12268. * Partial comparisons will match empty array and empty object `source`
  12269. * values against any array or object value, respectively. See `_.isEqual`
  12270. * for a list of supported value comparisons.
  12271. *
  12272. * @static
  12273. * @memberOf _
  12274. * @since 3.0.0
  12275. * @category Lang
  12276. * @param {Object} object The object to inspect.
  12277. * @param {Object} source The object of property values to match.
  12278. * @returns {boolean} Returns `true` if `object` is a match, else `false`.
  12279. * @example
  12280. *
  12281. * var object = { 'a': 1, 'b': 2 };
  12282. *
  12283. * _.isMatch(object, { 'b': 2 });
  12284. * // => true
  12285. *
  12286. * _.isMatch(object, { 'b': 1 });
  12287. * // => false
  12288. */
  12289. function isMatch(object, source) {
  12290. return object === source || baseIsMatch(object, source, getMatchData(source));
  12291. }
  12292. /**
  12293. * This method is like `_.isMatch` except that it accepts `customizer` which
  12294. * is invoked to compare values. If `customizer` returns `undefined`, comparisons
  12295. * are handled by the method instead. The `customizer` is invoked with five
  12296. * arguments: (objValue, srcValue, index|key, object, source).
  12297. *
  12298. * @static
  12299. * @memberOf _
  12300. * @since 4.0.0
  12301. * @category Lang
  12302. * @param {Object} object The object to inspect.
  12303. * @param {Object} source The object of property values to match.
  12304. * @param {Function} [customizer] The function to customize comparisons.
  12305. * @returns {boolean} Returns `true` if `object` is a match, else `false`.
  12306. * @example
  12307. *
  12308. * function isGreeting(value) {
  12309. * return /^h(?:i|ello)$/.test(value);
  12310. * }
  12311. *
  12312. * function customizer(objValue, srcValue) {
  12313. * if (isGreeting(objValue) && isGreeting(srcValue)) {
  12314. * return true;
  12315. * }
  12316. * }
  12317. *
  12318. * var object = { 'greeting': 'hello' };
  12319. * var source = { 'greeting': 'hi' };
  12320. *
  12321. * _.isMatchWith(object, source, customizer);
  12322. * // => true
  12323. */
  12324. function isMatchWith(object, source, customizer) {
  12325. customizer = typeof customizer == 'function' ? customizer : undefined;
  12326. return baseIsMatch(object, source, getMatchData(source), customizer);
  12327. }
  12328. /**
  12329. * Checks if `value` is `NaN`.
  12330. *
  12331. * **Note:** This method is based on
  12332. * [`Number.isNaN`](https://mdn.io/Number/isNaN) and is not the same as
  12333. * global [`isNaN`](https://mdn.io/isNaN) which returns `true` for
  12334. * `undefined` and other non-number values.
  12335. *
  12336. * @static
  12337. * @memberOf _
  12338. * @since 0.1.0
  12339. * @category Lang
  12340. * @param {*} value The value to check.
  12341. * @returns {boolean} Returns `true` if `value` is `NaN`, else `false`.
  12342. * @example
  12343. *
  12344. * _.isNaN(NaN);
  12345. * // => true
  12346. *
  12347. * _.isNaN(new Number(NaN));
  12348. * // => true
  12349. *
  12350. * isNaN(undefined);
  12351. * // => true
  12352. *
  12353. * _.isNaN(undefined);
  12354. * // => false
  12355. */
  12356. function isNaN(value) {
  12357. // An `NaN` primitive is the only value that is not equal to itself.
  12358. // Perform the `toStringTag` check first to avoid errors with some
  12359. // ActiveX objects in IE.
  12360. return isNumber(value) && value != +value;
  12361. }
  12362. /**
  12363. * Checks if `value` is a pristine native function.
  12364. *
  12365. * **Note:** This method can't reliably detect native functions in the presence
  12366. * of the core-js package because core-js circumvents this kind of detection.
  12367. * Despite multiple requests, the core-js maintainer has made it clear: any
  12368. * attempt to fix the detection will be obstructed. As a result, we're left
  12369. * with little choice but to throw an error. Unfortunately, this also affects
  12370. * packages, like [babel-polyfill](https://www.npmjs.com/package/babel-polyfill),
  12371. * which rely on core-js.
  12372. *
  12373. * @static
  12374. * @memberOf _
  12375. * @since 3.0.0
  12376. * @category Lang
  12377. * @param {*} value The value to check.
  12378. * @returns {boolean} Returns `true` if `value` is a native function,
  12379. * else `false`.
  12380. * @example
  12381. *
  12382. * _.isNative(Array.prototype.push);
  12383. * // => true
  12384. *
  12385. * _.isNative(_);
  12386. * // => false
  12387. */
  12388. function isNative(value) {
  12389. if (isMaskable(value)) {
  12390. throw new Error(CORE_ERROR_TEXT);
  12391. }
  12392. return baseIsNative(value);
  12393. }
  12394. /**
  12395. * Checks if `value` is `null`.
  12396. *
  12397. * @static
  12398. * @memberOf _
  12399. * @since 0.1.0
  12400. * @category Lang
  12401. * @param {*} value The value to check.
  12402. * @returns {boolean} Returns `true` if `value` is `null`, else `false`.
  12403. * @example
  12404. *
  12405. * _.isNull(null);
  12406. * // => true
  12407. *
  12408. * _.isNull(void 0);
  12409. * // => false
  12410. */
  12411. function isNull(value) {
  12412. return value === null;
  12413. }
  12414. /**
  12415. * Checks if `value` is `null` or `undefined`.
  12416. *
  12417. * @static
  12418. * @memberOf _
  12419. * @since 4.0.0
  12420. * @category Lang
  12421. * @param {*} value The value to check.
  12422. * @returns {boolean} Returns `true` if `value` is nullish, else `false`.
  12423. * @example
  12424. *
  12425. * _.isNil(null);
  12426. * // => true
  12427. *
  12428. * _.isNil(void 0);
  12429. * // => true
  12430. *
  12431. * _.isNil(NaN);
  12432. * // => false
  12433. */
  12434. function isNil(value) {
  12435. return value == null;
  12436. }
  12437. /**
  12438. * Checks if `value` is classified as a `Number` primitive or object.
  12439. *
  12440. * **Note:** To exclude `Infinity`, `-Infinity`, and `NaN`, which are
  12441. * classified as numbers, use the `_.isFinite` method.
  12442. *
  12443. * @static
  12444. * @memberOf _
  12445. * @since 0.1.0
  12446. * @category Lang
  12447. * @param {*} value The value to check.
  12448. * @returns {boolean} Returns `true` if `value` is a number, else `false`.
  12449. * @example
  12450. *
  12451. * _.isNumber(3);
  12452. * // => true
  12453. *
  12454. * _.isNumber(Number.MIN_VALUE);
  12455. * // => true
  12456. *
  12457. * _.isNumber(Infinity);
  12458. * // => true
  12459. *
  12460. * _.isNumber('3');
  12461. * // => false
  12462. */
  12463. function isNumber(value) {
  12464. return typeof value == 'number' ||
  12465. (isObjectLike(value) && baseGetTag(value) == numberTag);
  12466. }
  12467. /**
  12468. * Checks if `value` is a plain object, that is, an object created by the
  12469. * `Object` constructor or one with a `[[Prototype]]` of `null`.
  12470. *
  12471. * @static
  12472. * @memberOf _
  12473. * @since 0.8.0
  12474. * @category Lang
  12475. * @param {*} value The value to check.
  12476. * @returns {boolean} Returns `true` if `value` is a plain object, else `false`.
  12477. * @example
  12478. *
  12479. * function Foo() {
  12480. * this.a = 1;
  12481. * }
  12482. *
  12483. * _.isPlainObject(new Foo);
  12484. * // => false
  12485. *
  12486. * _.isPlainObject([1, 2, 3]);
  12487. * // => false
  12488. *
  12489. * _.isPlainObject({ 'x': 0, 'y': 0 });
  12490. * // => true
  12491. *
  12492. * _.isPlainObject(Object.create(null));
  12493. * // => true
  12494. */
  12495. function isPlainObject(value) {
  12496. if (!isObjectLike(value) || baseGetTag(value) != objectTag) {
  12497. return false;
  12498. }
  12499. var proto = getPrototype(value);
  12500. if (proto === null) {
  12501. return true;
  12502. }
  12503. var Ctor = hasOwnProperty.call(proto, 'constructor') && proto.constructor;
  12504. return typeof Ctor == 'function' && Ctor instanceof Ctor &&
  12505. funcToString.call(Ctor) == objectCtorString;
  12506. }
  12507. /**
  12508. * Checks if `value` is classified as a `RegExp` object.
  12509. *
  12510. * @static
  12511. * @memberOf _
  12512. * @since 0.1.0
  12513. * @category Lang
  12514. * @param {*} value The value to check.
  12515. * @returns {boolean} Returns `true` if `value` is a regexp, else `false`.
  12516. * @example
  12517. *
  12518. * _.isRegExp(/abc/);
  12519. * // => true
  12520. *
  12521. * _.isRegExp('/abc/');
  12522. * // => false
  12523. */
  12524. var isRegExp = nodeIsRegExp ? baseUnary(nodeIsRegExp) : baseIsRegExp;
  12525. /**
  12526. * Checks if `value` is a safe integer. An integer is safe if it's an IEEE-754
  12527. * double precision number which isn't the result of a rounded unsafe integer.
  12528. *
  12529. * **Note:** This method is based on
  12530. * [`Number.isSafeInteger`](https://mdn.io/Number/isSafeInteger).
  12531. *
  12532. * @static
  12533. * @memberOf _
  12534. * @since 4.0.0
  12535. * @category Lang
  12536. * @param {*} value The value to check.
  12537. * @returns {boolean} Returns `true` if `value` is a safe integer, else `false`.
  12538. * @example
  12539. *
  12540. * _.isSafeInteger(3);
  12541. * // => true
  12542. *
  12543. * _.isSafeInteger(Number.MIN_VALUE);
  12544. * // => false
  12545. *
  12546. * _.isSafeInteger(Infinity);
  12547. * // => false
  12548. *
  12549. * _.isSafeInteger('3');
  12550. * // => false
  12551. */
  12552. function isSafeInteger(value) {
  12553. return isInteger(value) && value >= -MAX_SAFE_INTEGER && value <= MAX_SAFE_INTEGER;
  12554. }
  12555. /**
  12556. * Checks if `value` is classified as a `Set` object.
  12557. *
  12558. * @static
  12559. * @memberOf _
  12560. * @since 4.3.0
  12561. * @category Lang
  12562. * @param {*} value The value to check.
  12563. * @returns {boolean} Returns `true` if `value` is a set, else `false`.
  12564. * @example
  12565. *
  12566. * _.isSet(new Set);
  12567. * // => true
  12568. *
  12569. * _.isSet(new WeakSet);
  12570. * // => false
  12571. */
  12572. var isSet = nodeIsSet ? baseUnary(nodeIsSet) : baseIsSet;
  12573. /**
  12574. * Checks if `value` is classified as a `String` primitive or object.
  12575. *
  12576. * @static
  12577. * @since 0.1.0
  12578. * @memberOf _
  12579. * @category Lang
  12580. * @param {*} value The value to check.
  12581. * @returns {boolean} Returns `true` if `value` is a string, else `false`.
  12582. * @example
  12583. *
  12584. * _.isString('abc');
  12585. * // => true
  12586. *
  12587. * _.isString(1);
  12588. * // => false
  12589. */
  12590. function isString(value) {
  12591. return typeof value == 'string' ||
  12592. (!isArray(value) && isObjectLike(value) && baseGetTag(value) == stringTag);
  12593. }
  12594. /**
  12595. * Checks if `value` is classified as a `Symbol` primitive or object.
  12596. *
  12597. * @static
  12598. * @memberOf _
  12599. * @since 4.0.0
  12600. * @category Lang
  12601. * @param {*} value The value to check.
  12602. * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.
  12603. * @example
  12604. *
  12605. * _.isSymbol(Symbol.iterator);
  12606. * // => true
  12607. *
  12608. * _.isSymbol('abc');
  12609. * // => false
  12610. */
  12611. function isSymbol(value) {
  12612. return typeof value == 'symbol' ||
  12613. (isObjectLike(value) && baseGetTag(value) == symbolTag);
  12614. }
  12615. /**
  12616. * Checks if `value` is classified as a typed array.
  12617. *
  12618. * @static
  12619. * @memberOf _
  12620. * @since 3.0.0
  12621. * @category Lang
  12622. * @param {*} value The value to check.
  12623. * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
  12624. * @example
  12625. *
  12626. * _.isTypedArray(new Uint8Array);
  12627. * // => true
  12628. *
  12629. * _.isTypedArray([]);
  12630. * // => false
  12631. */
  12632. var isTypedArray = nodeIsTypedArray ? baseUnary(nodeIsTypedArray) : baseIsTypedArray;
  12633. /**
  12634. * Checks if `value` is `undefined`.
  12635. *
  12636. * @static
  12637. * @since 0.1.0
  12638. * @memberOf _
  12639. * @category Lang
  12640. * @param {*} value The value to check.
  12641. * @returns {boolean} Returns `true` if `value` is `undefined`, else `false`.
  12642. * @example
  12643. *
  12644. * _.isUndefined(void 0);
  12645. * // => true
  12646. *
  12647. * _.isUndefined(null);
  12648. * // => false
  12649. */
  12650. function isUndefined(value) {
  12651. return value === undefined;
  12652. }
  12653. /**
  12654. * Checks if `value` is classified as a `WeakMap` object.
  12655. *
  12656. * @static
  12657. * @memberOf _
  12658. * @since 4.3.0
  12659. * @category Lang
  12660. * @param {*} value The value to check.
  12661. * @returns {boolean} Returns `true` if `value` is a weak map, else `false`.
  12662. * @example
  12663. *
  12664. * _.isWeakMap(new WeakMap);
  12665. * // => true
  12666. *
  12667. * _.isWeakMap(new Map);
  12668. * // => false
  12669. */
  12670. function isWeakMap(value) {
  12671. return isObjectLike(value) && getTag(value) == weakMapTag;
  12672. }
  12673. /**
  12674. * Checks if `value` is classified as a `WeakSet` object.
  12675. *
  12676. * @static
  12677. * @memberOf _
  12678. * @since 4.3.0
  12679. * @category Lang
  12680. * @param {*} value The value to check.
  12681. * @returns {boolean} Returns `true` if `value` is a weak set, else `false`.
  12682. * @example
  12683. *
  12684. * _.isWeakSet(new WeakSet);
  12685. * // => true
  12686. *
  12687. * _.isWeakSet(new Set);
  12688. * // => false
  12689. */
  12690. function isWeakSet(value) {
  12691. return isObjectLike(value) && baseGetTag(value) == weakSetTag;
  12692. }
  12693. /**
  12694. * Checks if `value` is less than `other`.
  12695. *
  12696. * @static
  12697. * @memberOf _
  12698. * @since 3.9.0
  12699. * @category Lang
  12700. * @param {*} value The value to compare.
  12701. * @param {*} other The other value to compare.
  12702. * @returns {boolean} Returns `true` if `value` is less than `other`,
  12703. * else `false`.
  12704. * @see _.gt
  12705. * @example
  12706. *
  12707. * _.lt(1, 3);
  12708. * // => true
  12709. *
  12710. * _.lt(3, 3);
  12711. * // => false
  12712. *
  12713. * _.lt(3, 1);
  12714. * // => false
  12715. */
  12716. var lt = createRelationalOperation(baseLt);
  12717. /**
  12718. * Checks if `value` is less than or equal to `other`.
  12719. *
  12720. * @static
  12721. * @memberOf _
  12722. * @since 3.9.0
  12723. * @category Lang
  12724. * @param {*} value The value to compare.
  12725. * @param {*} other The other value to compare.
  12726. * @returns {boolean} Returns `true` if `value` is less than or equal to
  12727. * `other`, else `false`.
  12728. * @see _.gte
  12729. * @example
  12730. *
  12731. * _.lte(1, 3);
  12732. * // => true
  12733. *
  12734. * _.lte(3, 3);
  12735. * // => true
  12736. *
  12737. * _.lte(3, 1);
  12738. * // => false
  12739. */
  12740. var lte = createRelationalOperation(function(value, other) {
  12741. return value <= other;
  12742. });
  12743. /**
  12744. * Converts `value` to an array.
  12745. *
  12746. * @static
  12747. * @since 0.1.0
  12748. * @memberOf _
  12749. * @category Lang
  12750. * @param {*} value The value to convert.
  12751. * @returns {Array} Returns the converted array.
  12752. * @example
  12753. *
  12754. * _.toArray({ 'a': 1, 'b': 2 });
  12755. * // => [1, 2]
  12756. *
  12757. * _.toArray('abc');
  12758. * // => ['a', 'b', 'c']
  12759. *
  12760. * _.toArray(1);
  12761. * // => []
  12762. *
  12763. * _.toArray(null);
  12764. * // => []
  12765. */
  12766. function toArray(value) {
  12767. if (!value) {
  12768. return [];
  12769. }
  12770. if (isArrayLike(value)) {
  12771. return isString(value) ? stringToArray(value) : copyArray(value);
  12772. }
  12773. if (symIterator && value[symIterator]) {
  12774. return iteratorToArray(value[symIterator]());
  12775. }
  12776. var tag = getTag(value),
  12777. func = tag == mapTag ? mapToArray : (tag == setTag ? setToArray : values);
  12778. return func(value);
  12779. }
  12780. /**
  12781. * Converts `value` to a finite number.
  12782. *
  12783. * @static
  12784. * @memberOf _
  12785. * @since 4.12.0
  12786. * @category Lang
  12787. * @param {*} value The value to convert.
  12788. * @returns {number} Returns the converted number.
  12789. * @example
  12790. *
  12791. * _.toFinite(3.2);
  12792. * // => 3.2
  12793. *
  12794. * _.toFinite(Number.MIN_VALUE);
  12795. * // => 5e-324
  12796. *
  12797. * _.toFinite(Infinity);
  12798. * // => 1.7976931348623157e+308
  12799. *
  12800. * _.toFinite('3.2');
  12801. * // => 3.2
  12802. */
  12803. function toFinite(value) {
  12804. if (!value) {
  12805. return value === 0 ? value : 0;
  12806. }
  12807. value = toNumber(value);
  12808. if (value === INFINITY || value === -INFINITY) {
  12809. var sign = (value < 0 ? -1 : 1);
  12810. return sign * MAX_INTEGER;
  12811. }
  12812. return value === value ? value : 0;
  12813. }
  12814. /**
  12815. * Converts `value` to an integer.
  12816. *
  12817. * **Note:** This method is loosely based on
  12818. * [`ToInteger`](http://www.ecma-international.org/ecma-262/7.0/#sec-tointeger).
  12819. *
  12820. * @static
  12821. * @memberOf _
  12822. * @since 4.0.0
  12823. * @category Lang
  12824. * @param {*} value The value to convert.
  12825. * @returns {number} Returns the converted integer.
  12826. * @example
  12827. *
  12828. * _.toInteger(3.2);
  12829. * // => 3
  12830. *
  12831. * _.toInteger(Number.MIN_VALUE);
  12832. * // => 0
  12833. *
  12834. * _.toInteger(Infinity);
  12835. * // => 1.7976931348623157e+308
  12836. *
  12837. * _.toInteger('3.2');
  12838. * // => 3
  12839. */
  12840. function toInteger(value) {
  12841. var result = toFinite(value),
  12842. remainder = result % 1;
  12843. return result === result ? (remainder ? result - remainder : result) : 0;
  12844. }
  12845. /**
  12846. * Converts `value` to an integer suitable for use as the length of an
  12847. * array-like object.
  12848. *
  12849. * **Note:** This method is based on
  12850. * [`ToLength`](http://ecma-international.org/ecma-262/7.0/#sec-tolength).
  12851. *
  12852. * @static
  12853. * @memberOf _
  12854. * @since 4.0.0
  12855. * @category Lang
  12856. * @param {*} value The value to convert.
  12857. * @returns {number} Returns the converted integer.
  12858. * @example
  12859. *
  12860. * _.toLength(3.2);
  12861. * // => 3
  12862. *
  12863. * _.toLength(Number.MIN_VALUE);
  12864. * // => 0
  12865. *
  12866. * _.toLength(Infinity);
  12867. * // => 4294967295
  12868. *
  12869. * _.toLength('3.2');
  12870. * // => 3
  12871. */
  12872. function toLength(value) {
  12873. return value ? baseClamp(toInteger(value), 0, MAX_ARRAY_LENGTH) : 0;
  12874. }
  12875. /**
  12876. * Converts `value` to a number.
  12877. *
  12878. * @static
  12879. * @memberOf _
  12880. * @since 4.0.0
  12881. * @category Lang
  12882. * @param {*} value The value to process.
  12883. * @returns {number} Returns the number.
  12884. * @example
  12885. *
  12886. * _.toNumber(3.2);
  12887. * // => 3.2
  12888. *
  12889. * _.toNumber(Number.MIN_VALUE);
  12890. * // => 5e-324
  12891. *
  12892. * _.toNumber(Infinity);
  12893. * // => Infinity
  12894. *
  12895. * _.toNumber('3.2');
  12896. * // => 3.2
  12897. */
  12898. function toNumber(value) {
  12899. if (typeof value == 'number') {
  12900. return value;
  12901. }
  12902. if (isSymbol(value)) {
  12903. return NAN;
  12904. }
  12905. if (isObject(value)) {
  12906. var other = typeof value.valueOf == 'function' ? value.valueOf() : value;
  12907. value = isObject(other) ? (other + '') : other;
  12908. }
  12909. if (typeof value != 'string') {
  12910. return value === 0 ? value : +value;
  12911. }
  12912. value = value.replace(reTrim, '');
  12913. var isBinary = reIsBinary.test(value);
  12914. return (isBinary || reIsOctal.test(value))
  12915. ? freeParseInt(value.slice(2), isBinary ? 2 : 8)
  12916. : (reIsBadHex.test(value) ? NAN : +value);
  12917. }
  12918. /**
  12919. * Converts `value` to a plain object flattening inherited enumerable string
  12920. * keyed properties of `value` to own properties of the plain object.
  12921. *
  12922. * @static
  12923. * @memberOf _
  12924. * @since 3.0.0
  12925. * @category Lang
  12926. * @param {*} value The value to convert.
  12927. * @returns {Object} Returns the converted plain object.
  12928. * @example
  12929. *
  12930. * function Foo() {
  12931. * this.b = 2;
  12932. * }
  12933. *
  12934. * Foo.prototype.c = 3;
  12935. *
  12936. * _.assign({ 'a': 1 }, new Foo);
  12937. * // => { 'a': 1, 'b': 2 }
  12938. *
  12939. * _.assign({ 'a': 1 }, _.toPlainObject(new Foo));
  12940. * // => { 'a': 1, 'b': 2, 'c': 3 }
  12941. */
  12942. function toPlainObject(value) {
  12943. return copyObject(value, keysIn(value));
  12944. }
  12945. /**
  12946. * Converts `value` to a safe integer. A safe integer can be compared and
  12947. * represented correctly.
  12948. *
  12949. * @static
  12950. * @memberOf _
  12951. * @since 4.0.0
  12952. * @category Lang
  12953. * @param {*} value The value to convert.
  12954. * @returns {number} Returns the converted integer.
  12955. * @example
  12956. *
  12957. * _.toSafeInteger(3.2);
  12958. * // => 3
  12959. *
  12960. * _.toSafeInteger(Number.MIN_VALUE);
  12961. * // => 0
  12962. *
  12963. * _.toSafeInteger(Infinity);
  12964. * // => 9007199254740991
  12965. *
  12966. * _.toSafeInteger('3.2');
  12967. * // => 3
  12968. */
  12969. function toSafeInteger(value) {
  12970. return value
  12971. ? baseClamp(toInteger(value), -MAX_SAFE_INTEGER, MAX_SAFE_INTEGER)
  12972. : (value === 0 ? value : 0);
  12973. }
  12974. /**
  12975. * Converts `value` to a string. An empty string is returned for `null`
  12976. * and `undefined` values. The sign of `-0` is preserved.
  12977. *
  12978. * @static
  12979. * @memberOf _
  12980. * @since 4.0.0
  12981. * @category Lang
  12982. * @param {*} value The value to convert.
  12983. * @returns {string} Returns the converted string.
  12984. * @example
  12985. *
  12986. * _.toString(null);
  12987. * // => ''
  12988. *
  12989. * _.toString(-0);
  12990. * // => '-0'
  12991. *
  12992. * _.toString([1, 2, 3]);
  12993. * // => '1,2,3'
  12994. */
  12995. function toString(value) {
  12996. return value == null ? '' : baseToString(value);
  12997. }
  12998. /*------------------------------------------------------------------------*/
  12999. /**
  13000. * Assigns own enumerable string keyed properties of source objects to the
  13001. * destination object. Source objects are applied from left to right.
  13002. * Subsequent sources overwrite property assignments of previous sources.
  13003. *
  13004. * **Note:** This method mutates `object` and is loosely based on
  13005. * [`Object.assign`](https://mdn.io/Object/assign).
  13006. *
  13007. * @static
  13008. * @memberOf _
  13009. * @since 0.10.0
  13010. * @category Object
  13011. * @param {Object} object The destination object.
  13012. * @param {...Object} [sources] The source objects.
  13013. * @returns {Object} Returns `object`.
  13014. * @see _.assignIn
  13015. * @example
  13016. *
  13017. * function Foo() {
  13018. * this.a = 1;
  13019. * }
  13020. *
  13021. * function Bar() {
  13022. * this.c = 3;
  13023. * }
  13024. *
  13025. * Foo.prototype.b = 2;
  13026. * Bar.prototype.d = 4;
  13027. *
  13028. * _.assign({ 'a': 0 }, new Foo, new Bar);
  13029. * // => { 'a': 1, 'c': 3 }
  13030. */
  13031. var assign = createAssigner(function(object, source) {
  13032. if (isPrototype(source) || isArrayLike(source)) {
  13033. copyObject(source, keys(source), object);
  13034. return;
  13035. }
  13036. for (var key in source) {
  13037. if (hasOwnProperty.call(source, key)) {
  13038. assignValue(object, key, source[key]);
  13039. }
  13040. }
  13041. });
  13042. /**
  13043. * This method is like `_.assign` except that it iterates over own and
  13044. * inherited source properties.
  13045. *
  13046. * **Note:** This method mutates `object`.
  13047. *
  13048. * @static
  13049. * @memberOf _
  13050. * @since 4.0.0
  13051. * @alias extend
  13052. * @category Object
  13053. * @param {Object} object The destination object.
  13054. * @param {...Object} [sources] The source objects.
  13055. * @returns {Object} Returns `object`.
  13056. * @see _.assign
  13057. * @example
  13058. *
  13059. * function Foo() {
  13060. * this.a = 1;
  13061. * }
  13062. *
  13063. * function Bar() {
  13064. * this.c = 3;
  13065. * }
  13066. *
  13067. * Foo.prototype.b = 2;
  13068. * Bar.prototype.d = 4;
  13069. *
  13070. * _.assignIn({ 'a': 0 }, new Foo, new Bar);
  13071. * // => { 'a': 1, 'b': 2, 'c': 3, 'd': 4 }
  13072. */
  13073. var assignIn = createAssigner(function(object, source) {
  13074. copyObject(source, keysIn(source), object);
  13075. });
  13076. /**
  13077. * This method is like `_.assignIn` except that it accepts `customizer`
  13078. * which is invoked to produce the assigned values. If `customizer` returns
  13079. * `undefined`, assignment is handled by the method instead. The `customizer`
  13080. * is invoked with five arguments: (objValue, srcValue, key, object, source).
  13081. *
  13082. * **Note:** This method mutates `object`.
  13083. *
  13084. * @static
  13085. * @memberOf _
  13086. * @since 4.0.0
  13087. * @alias extendWith
  13088. * @category Object
  13089. * @param {Object} object The destination object.
  13090. * @param {...Object} sources The source objects.
  13091. * @param {Function} [customizer] The function to customize assigned values.
  13092. * @returns {Object} Returns `object`.
  13093. * @see _.assignWith
  13094. * @example
  13095. *
  13096. * function customizer(objValue, srcValue) {
  13097. * return _.isUndefined(objValue) ? srcValue : objValue;
  13098. * }
  13099. *
  13100. * var defaults = _.partialRight(_.assignInWith, customizer);
  13101. *
  13102. * defaults({ 'a': 1 }, { 'b': 2 }, { 'a': 3 });
  13103. * // => { 'a': 1, 'b': 2 }
  13104. */
  13105. var assignInWith = createAssigner(function(object, source, srcIndex, customizer) {
  13106. copyObject(source, keysIn(source), object, customizer);
  13107. });
  13108. /**
  13109. * This method is like `_.assign` except that it accepts `customizer`
  13110. * which is invoked to produce the assigned values. If `customizer` returns
  13111. * `undefined`, assignment is handled by the method instead. The `customizer`
  13112. * is invoked with five arguments: (objValue, srcValue, key, object, source).
  13113. *
  13114. * **Note:** This method mutates `object`.
  13115. *
  13116. * @static
  13117. * @memberOf _
  13118. * @since 4.0.0
  13119. * @category Object
  13120. * @param {Object} object The destination object.
  13121. * @param {...Object} sources The source objects.
  13122. * @param {Function} [customizer] The function to customize assigned values.
  13123. * @returns {Object} Returns `object`.
  13124. * @see _.assignInWith
  13125. * @example
  13126. *
  13127. * function customizer(objValue, srcValue) {
  13128. * return _.isUndefined(objValue) ? srcValue : objValue;
  13129. * }
  13130. *
  13131. * var defaults = _.partialRight(_.assignWith, customizer);
  13132. *
  13133. * defaults({ 'a': 1 }, { 'b': 2 }, { 'a': 3 });
  13134. * // => { 'a': 1, 'b': 2 }
  13135. */
  13136. var assignWith = createAssigner(function(object, source, srcIndex, customizer) {
  13137. copyObject(source, keys(source), object, customizer);
  13138. });
  13139. /**
  13140. * Creates an array of values corresponding to `paths` of `object`.
  13141. *
  13142. * @static
  13143. * @memberOf _
  13144. * @since 1.0.0
  13145. * @category Object
  13146. * @param {Object} object The object to iterate over.
  13147. * @param {...(string|string[])} [paths] The property paths to pick.
  13148. * @returns {Array} Returns the picked values.
  13149. * @example
  13150. *
  13151. * var object = { 'a': [{ 'b': { 'c': 3 } }, 4] };
  13152. *
  13153. * _.at(object, ['a[0].b.c', 'a[1]']);
  13154. * // => [3, 4]
  13155. */
  13156. var at = flatRest(baseAt);
  13157. /**
  13158. * Creates an object that inherits from the `prototype` object. If a
  13159. * `properties` object is given, its own enumerable string keyed properties
  13160. * are assigned to the created object.
  13161. *
  13162. * @static
  13163. * @memberOf _
  13164. * @since 2.3.0
  13165. * @category Object
  13166. * @param {Object} prototype The object to inherit from.
  13167. * @param {Object} [properties] The properties to assign to the object.
  13168. * @returns {Object} Returns the new object.
  13169. * @example
  13170. *
  13171. * function Shape() {
  13172. * this.x = 0;
  13173. * this.y = 0;
  13174. * }
  13175. *
  13176. * function Circle() {
  13177. * Shape.call(this);
  13178. * }
  13179. *
  13180. * Circle.prototype = _.create(Shape.prototype, {
  13181. * 'constructor': Circle
  13182. * });
  13183. *
  13184. * var circle = new Circle;
  13185. * circle instanceof Circle;
  13186. * // => true
  13187. *
  13188. * circle instanceof Shape;
  13189. * // => true
  13190. */
  13191. function create(prototype, properties) {
  13192. var result = baseCreate(prototype);
  13193. return properties == null ? result : baseAssign(result, properties);
  13194. }
  13195. /**
  13196. * Assigns own and inherited enumerable string keyed properties of source
  13197. * objects to the destination object for all destination properties that
  13198. * resolve to `undefined`. Source objects are applied from left to right.
  13199. * Once a property is set, additional values of the same property are ignored.
  13200. *
  13201. * **Note:** This method mutates `object`.
  13202. *
  13203. * @static
  13204. * @since 0.1.0
  13205. * @memberOf _
  13206. * @category Object
  13207. * @param {Object} object The destination object.
  13208. * @param {...Object} [sources] The source objects.
  13209. * @returns {Object} Returns `object`.
  13210. * @see _.defaultsDeep
  13211. * @example
  13212. *
  13213. * _.defaults({ 'a': 1 }, { 'b': 2 }, { 'a': 3 });
  13214. * // => { 'a': 1, 'b': 2 }
  13215. */
  13216. var defaults = baseRest(function(object, sources) {
  13217. object = Object(object);
  13218. var index = -1;
  13219. var length = sources.length;
  13220. var guard = length > 2 ? sources[2] : undefined;
  13221. if (guard && isIterateeCall(sources[0], sources[1], guard)) {
  13222. length = 1;
  13223. }
  13224. while (++index < length) {
  13225. var source = sources[index];
  13226. var props = keysIn(source);
  13227. var propsIndex = -1;
  13228. var propsLength = props.length;
  13229. while (++propsIndex < propsLength) {
  13230. var key = props[propsIndex];
  13231. var value = object[key];
  13232. if (value === undefined ||
  13233. (eq(value, objectProto[key]) && !hasOwnProperty.call(object, key))) {
  13234. object[key] = source[key];
  13235. }
  13236. }
  13237. }
  13238. return object;
  13239. });
  13240. /**
  13241. * This method is like `_.defaults` except that it recursively assigns
  13242. * default properties.
  13243. *
  13244. * **Note:** This method mutates `object`.
  13245. *
  13246. * @static
  13247. * @memberOf _
  13248. * @since 3.10.0
  13249. * @category Object
  13250. * @param {Object} object The destination object.
  13251. * @param {...Object} [sources] The source objects.
  13252. * @returns {Object} Returns `object`.
  13253. * @see _.defaults
  13254. * @example
  13255. *
  13256. * _.defaultsDeep({ 'a': { 'b': 2 } }, { 'a': { 'b': 1, 'c': 3 } });
  13257. * // => { 'a': { 'b': 2, 'c': 3 } }
  13258. */
  13259. var defaultsDeep = baseRest(function(args) {
  13260. args.push(undefined, customDefaultsMerge);
  13261. return apply(mergeWith, undefined, args);
  13262. });
  13263. /**
  13264. * This method is like `_.find` except that it returns the key of the first
  13265. * element `predicate` returns truthy for instead of the element itself.
  13266. *
  13267. * @static
  13268. * @memberOf _
  13269. * @since 1.1.0
  13270. * @category Object
  13271. * @param {Object} object The object to inspect.
  13272. * @param {Function} [predicate=_.identity] The function invoked per iteration.
  13273. * @returns {string|undefined} Returns the key of the matched element,
  13274. * else `undefined`.
  13275. * @example
  13276. *
  13277. * var users = {
  13278. * 'barney': { 'age': 36, 'active': true },
  13279. * 'fred': { 'age': 40, 'active': false },
  13280. * 'pebbles': { 'age': 1, 'active': true }
  13281. * };
  13282. *
  13283. * _.findKey(users, function(o) { return o.age < 40; });
  13284. * // => 'barney' (iteration order is not guaranteed)
  13285. *
  13286. * // The `_.matches` iteratee shorthand.
  13287. * _.findKey(users, { 'age': 1, 'active': true });
  13288. * // => 'pebbles'
  13289. *
  13290. * // The `_.matchesProperty` iteratee shorthand.
  13291. * _.findKey(users, ['active', false]);
  13292. * // => 'fred'
  13293. *
  13294. * // The `_.property` iteratee shorthand.
  13295. * _.findKey(users, 'active');
  13296. * // => 'barney'
  13297. */
  13298. function findKey(object, predicate) {
  13299. return baseFindKey(object, getIteratee(predicate, 3), baseForOwn);
  13300. }
  13301. /**
  13302. * This method is like `_.findKey` except that it iterates over elements of
  13303. * a collection in the opposite order.
  13304. *
  13305. * @static
  13306. * @memberOf _
  13307. * @since 2.0.0
  13308. * @category Object
  13309. * @param {Object} object The object to inspect.
  13310. * @param {Function} [predicate=_.identity] The function invoked per iteration.
  13311. * @returns {string|undefined} Returns the key of the matched element,
  13312. * else `undefined`.
  13313. * @example
  13314. *
  13315. * var users = {
  13316. * 'barney': { 'age': 36, 'active': true },
  13317. * 'fred': { 'age': 40, 'active': false },
  13318. * 'pebbles': { 'age': 1, 'active': true }
  13319. * };
  13320. *
  13321. * _.findLastKey(users, function(o) { return o.age < 40; });
  13322. * // => returns 'pebbles' assuming `_.findKey` returns 'barney'
  13323. *
  13324. * // The `_.matches` iteratee shorthand.
  13325. * _.findLastKey(users, { 'age': 36, 'active': true });
  13326. * // => 'barney'
  13327. *
  13328. * // The `_.matchesProperty` iteratee shorthand.
  13329. * _.findLastKey(users, ['active', false]);
  13330. * // => 'fred'
  13331. *
  13332. * // The `_.property` iteratee shorthand.
  13333. * _.findLastKey(users, 'active');
  13334. * // => 'pebbles'
  13335. */
  13336. function findLastKey(object, predicate) {
  13337. return baseFindKey(object, getIteratee(predicate, 3), baseForOwnRight);
  13338. }
  13339. /**
  13340. * Iterates over own and inherited enumerable string keyed properties of an
  13341. * object and invokes `iteratee` for each property. The iteratee is invoked
  13342. * with three arguments: (value, key, object). Iteratee functions may exit
  13343. * iteration early by explicitly returning `false`.
  13344. *
  13345. * @static
  13346. * @memberOf _
  13347. * @since 0.3.0
  13348. * @category Object
  13349. * @param {Object} object The object to iterate over.
  13350. * @param {Function} [iteratee=_.identity] The function invoked per iteration.
  13351. * @returns {Object} Returns `object`.
  13352. * @see _.forInRight
  13353. * @example
  13354. *
  13355. * function Foo() {
  13356. * this.a = 1;
  13357. * this.b = 2;
  13358. * }
  13359. *
  13360. * Foo.prototype.c = 3;
  13361. *
  13362. * _.forIn(new Foo, function(value, key) {
  13363. * console.log(key);
  13364. * });
  13365. * // => Logs 'a', 'b', then 'c' (iteration order is not guaranteed).
  13366. */
  13367. function forIn(object, iteratee) {
  13368. return object == null
  13369. ? object
  13370. : baseFor(object, getIteratee(iteratee, 3), keysIn);
  13371. }
  13372. /**
  13373. * This method is like `_.forIn` except that it iterates over properties of
  13374. * `object` in the opposite order.
  13375. *
  13376. * @static
  13377. * @memberOf _
  13378. * @since 2.0.0
  13379. * @category Object
  13380. * @param {Object} object The object to iterate over.
  13381. * @param {Function} [iteratee=_.identity] The function invoked per iteration.
  13382. * @returns {Object} Returns `object`.
  13383. * @see _.forIn
  13384. * @example
  13385. *
  13386. * function Foo() {
  13387. * this.a = 1;
  13388. * this.b = 2;
  13389. * }
  13390. *
  13391. * Foo.prototype.c = 3;
  13392. *
  13393. * _.forInRight(new Foo, function(value, key) {
  13394. * console.log(key);
  13395. * });
  13396. * // => Logs 'c', 'b', then 'a' assuming `_.forIn` logs 'a', 'b', then 'c'.
  13397. */
  13398. function forInRight(object, iteratee) {
  13399. return object == null
  13400. ? object
  13401. : baseForRight(object, getIteratee(iteratee, 3), keysIn);
  13402. }
  13403. /**
  13404. * Iterates over own enumerable string keyed properties of an object and
  13405. * invokes `iteratee` for each property. The iteratee is invoked with three
  13406. * arguments: (value, key, object). Iteratee functions may exit iteration
  13407. * early by explicitly returning `false`.
  13408. *
  13409. * @static
  13410. * @memberOf _
  13411. * @since 0.3.0
  13412. * @category Object
  13413. * @param {Object} object The object to iterate over.
  13414. * @param {Function} [iteratee=_.identity] The function invoked per iteration.
  13415. * @returns {Object} Returns `object`.
  13416. * @see _.forOwnRight
  13417. * @example
  13418. *
  13419. * function Foo() {
  13420. * this.a = 1;
  13421. * this.b = 2;
  13422. * }
  13423. *
  13424. * Foo.prototype.c = 3;
  13425. *
  13426. * _.forOwn(new Foo, function(value, key) {
  13427. * console.log(key);
  13428. * });
  13429. * // => Logs 'a' then 'b' (iteration order is not guaranteed).
  13430. */
  13431. function forOwn(object, iteratee) {
  13432. return object && baseForOwn(object, getIteratee(iteratee, 3));
  13433. }
  13434. /**
  13435. * This method is like `_.forOwn` except that it iterates over properties of
  13436. * `object` in the opposite order.
  13437. *
  13438. * @static
  13439. * @memberOf _
  13440. * @since 2.0.0
  13441. * @category Object
  13442. * @param {Object} object The object to iterate over.
  13443. * @param {Function} [iteratee=_.identity] The function invoked per iteration.
  13444. * @returns {Object} Returns `object`.
  13445. * @see _.forOwn
  13446. * @example
  13447. *
  13448. * function Foo() {
  13449. * this.a = 1;
  13450. * this.b = 2;
  13451. * }
  13452. *
  13453. * Foo.prototype.c = 3;
  13454. *
  13455. * _.forOwnRight(new Foo, function(value, key) {
  13456. * console.log(key);
  13457. * });
  13458. * // => Logs 'b' then 'a' assuming `_.forOwn` logs 'a' then 'b'.
  13459. */
  13460. function forOwnRight(object, iteratee) {
  13461. return object && baseForOwnRight(object, getIteratee(iteratee, 3));
  13462. }
  13463. /**
  13464. * Creates an array of function property names from own enumerable properties
  13465. * of `object`.
  13466. *
  13467. * @static
  13468. * @since 0.1.0
  13469. * @memberOf _
  13470. * @category Object
  13471. * @param {Object} object The object to inspect.
  13472. * @returns {Array} Returns the function names.
  13473. * @see _.functionsIn
  13474. * @example
  13475. *
  13476. * function Foo() {
  13477. * this.a = _.constant('a');
  13478. * this.b = _.constant('b');
  13479. * }
  13480. *
  13481. * Foo.prototype.c = _.constant('c');
  13482. *
  13483. * _.functions(new Foo);
  13484. * // => ['a', 'b']
  13485. */
  13486. function functions(object) {
  13487. return object == null ? [] : baseFunctions(object, keys(object));
  13488. }
  13489. /**
  13490. * Creates an array of function property names from own and inherited
  13491. * enumerable properties of `object`.
  13492. *
  13493. * @static
  13494. * @memberOf _
  13495. * @since 4.0.0
  13496. * @category Object
  13497. * @param {Object} object The object to inspect.
  13498. * @returns {Array} Returns the function names.
  13499. * @see _.functions
  13500. * @example
  13501. *
  13502. * function Foo() {
  13503. * this.a = _.constant('a');
  13504. * this.b = _.constant('b');
  13505. * }
  13506. *
  13507. * Foo.prototype.c = _.constant('c');
  13508. *
  13509. * _.functionsIn(new Foo);
  13510. * // => ['a', 'b', 'c']
  13511. */
  13512. function functionsIn(object) {
  13513. return object == null ? [] : baseFunctions(object, keysIn(object));
  13514. }
  13515. /**
  13516. * Gets the value at `path` of `object`. If the resolved value is
  13517. * `undefined`, the `defaultValue` is returned in its place.
  13518. *
  13519. * @static
  13520. * @memberOf _
  13521. * @since 3.7.0
  13522. * @category Object
  13523. * @param {Object} object The object to query.
  13524. * @param {Array|string} path The path of the property to get.
  13525. * @param {*} [defaultValue] The value returned for `undefined` resolved values.
  13526. * @returns {*} Returns the resolved value.
  13527. * @example
  13528. *
  13529. * var object = { 'a': [{ 'b': { 'c': 3 } }] };
  13530. *
  13531. * _.get(object, 'a[0].b.c');
  13532. * // => 3
  13533. *
  13534. * _.get(object, ['a', '0', 'b', 'c']);
  13535. * // => 3
  13536. *
  13537. * _.get(object, 'a.b.c', 'default');
  13538. * // => 'default'
  13539. */
  13540. function get(object, path, defaultValue) {
  13541. var result = object == null ? undefined : baseGet(object, path);
  13542. return result === undefined ? defaultValue : result;
  13543. }
  13544. /**
  13545. * Checks if `path` is a direct property of `object`.
  13546. *
  13547. * @static
  13548. * @since 0.1.0
  13549. * @memberOf _
  13550. * @category Object
  13551. * @param {Object} object The object to query.
  13552. * @param {Array|string} path The path to check.
  13553. * @returns {boolean} Returns `true` if `path` exists, else `false`.
  13554. * @example
  13555. *
  13556. * var object = { 'a': { 'b': 2 } };
  13557. * var other = _.create({ 'a': _.create({ 'b': 2 }) });
  13558. *
  13559. * _.has(object, 'a');
  13560. * // => true
  13561. *
  13562. * _.has(object, 'a.b');
  13563. * // => true
  13564. *
  13565. * _.has(object, ['a', 'b']);
  13566. * // => true
  13567. *
  13568. * _.has(other, 'a');
  13569. * // => false
  13570. */
  13571. function has(object, path) {
  13572. return object != null && hasPath(object, path, baseHas);
  13573. }
  13574. /**
  13575. * Checks if `path` is a direct or inherited property of `object`.
  13576. *
  13577. * @static
  13578. * @memberOf _
  13579. * @since 4.0.0
  13580. * @category Object
  13581. * @param {Object} object The object to query.
  13582. * @param {Array|string} path The path to check.
  13583. * @returns {boolean} Returns `true` if `path` exists, else `false`.
  13584. * @example
  13585. *
  13586. * var object = _.create({ 'a': _.create({ 'b': 2 }) });
  13587. *
  13588. * _.hasIn(object, 'a');
  13589. * // => true
  13590. *
  13591. * _.hasIn(object, 'a.b');
  13592. * // => true
  13593. *
  13594. * _.hasIn(object, ['a', 'b']);
  13595. * // => true
  13596. *
  13597. * _.hasIn(object, 'b');
  13598. * // => false
  13599. */
  13600. function hasIn(object, path) {
  13601. return object != null && hasPath(object, path, baseHasIn);
  13602. }
  13603. /**
  13604. * Creates an object composed of the inverted keys and values of `object`.
  13605. * If `object` contains duplicate values, subsequent values overwrite
  13606. * property assignments of previous values.
  13607. *
  13608. * @static
  13609. * @memberOf _
  13610. * @since 0.7.0
  13611. * @category Object
  13612. * @param {Object} object The object to invert.
  13613. * @returns {Object} Returns the new inverted object.
  13614. * @example
  13615. *
  13616. * var object = { 'a': 1, 'b': 2, 'c': 1 };
  13617. *
  13618. * _.invert(object);
  13619. * // => { '1': 'c', '2': 'b' }
  13620. */
  13621. var invert = createInverter(function(result, value, key) {
  13622. if (value != null &&
  13623. typeof value.toString != 'function') {
  13624. value = nativeObjectToString.call(value);
  13625. }
  13626. result[value] = key;
  13627. }, constant(identity));
  13628. /**
  13629. * This method is like `_.invert` except that the inverted object is generated
  13630. * from the results of running each element of `object` thru `iteratee`. The
  13631. * corresponding inverted value of each inverted key is an array of keys
  13632. * responsible for generating the inverted value. The iteratee is invoked
  13633. * with one argument: (value).
  13634. *
  13635. * @static
  13636. * @memberOf _
  13637. * @since 4.1.0
  13638. * @category Object
  13639. * @param {Object} object The object to invert.
  13640. * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
  13641. * @returns {Object} Returns the new inverted object.
  13642. * @example
  13643. *
  13644. * var object = { 'a': 1, 'b': 2, 'c': 1 };
  13645. *
  13646. * _.invertBy(object);
  13647. * // => { '1': ['a', 'c'], '2': ['b'] }
  13648. *
  13649. * _.invertBy(object, function(value) {
  13650. * return 'group' + value;
  13651. * });
  13652. * // => { 'group1': ['a', 'c'], 'group2': ['b'] }
  13653. */
  13654. var invertBy = createInverter(function(result, value, key) {
  13655. if (value != null &&
  13656. typeof value.toString != 'function') {
  13657. value = nativeObjectToString.call(value);
  13658. }
  13659. if (hasOwnProperty.call(result, value)) {
  13660. result[value].push(key);
  13661. } else {
  13662. result[value] = [key];
  13663. }
  13664. }, getIteratee);
  13665. /**
  13666. * Invokes the method at `path` of `object`.
  13667. *
  13668. * @static
  13669. * @memberOf _
  13670. * @since 4.0.0
  13671. * @category Object
  13672. * @param {Object} object The object to query.
  13673. * @param {Array|string} path The path of the method to invoke.
  13674. * @param {...*} [args] The arguments to invoke the method with.
  13675. * @returns {*} Returns the result of the invoked method.
  13676. * @example
  13677. *
  13678. * var object = { 'a': [{ 'b': { 'c': [1, 2, 3, 4] } }] };
  13679. *
  13680. * _.invoke(object, 'a[0].b.c.slice', 1, 3);
  13681. * // => [2, 3]
  13682. */
  13683. var invoke = baseRest(baseInvoke);
  13684. /**
  13685. * Creates an array of the own enumerable property names of `object`.
  13686. *
  13687. * **Note:** Non-object values are coerced to objects. See the
  13688. * [ES spec](http://ecma-international.org/ecma-262/7.0/#sec-object.keys)
  13689. * for more details.
  13690. *
  13691. * @static
  13692. * @since 0.1.0
  13693. * @memberOf _
  13694. * @category Object
  13695. * @param {Object} object The object to query.
  13696. * @returns {Array} Returns the array of property names.
  13697. * @example
  13698. *
  13699. * function Foo() {
  13700. * this.a = 1;
  13701. * this.b = 2;
  13702. * }
  13703. *
  13704. * Foo.prototype.c = 3;
  13705. *
  13706. * _.keys(new Foo);
  13707. * // => ['a', 'b'] (iteration order is not guaranteed)
  13708. *
  13709. * _.keys('hi');
  13710. * // => ['0', '1']
  13711. */
  13712. function keys(object) {
  13713. return isArrayLike(object) ? arrayLikeKeys(object) : baseKeys(object);
  13714. }
  13715. /**
  13716. * Creates an array of the own and inherited enumerable property names of `object`.
  13717. *
  13718. * **Note:** Non-object values are coerced to objects.
  13719. *
  13720. * @static
  13721. * @memberOf _
  13722. * @since 3.0.0
  13723. * @category Object
  13724. * @param {Object} object The object to query.
  13725. * @returns {Array} Returns the array of property names.
  13726. * @example
  13727. *
  13728. * function Foo() {
  13729. * this.a = 1;
  13730. * this.b = 2;
  13731. * }
  13732. *
  13733. * Foo.prototype.c = 3;
  13734. *
  13735. * _.keysIn(new Foo);
  13736. * // => ['a', 'b', 'c'] (iteration order is not guaranteed)
  13737. */
  13738. function keysIn(object) {
  13739. return isArrayLike(object) ? arrayLikeKeys(object, true) : baseKeysIn(object);
  13740. }
  13741. /**
  13742. * The opposite of `_.mapValues`; this method creates an object with the
  13743. * same values as `object` and keys generated by running each own enumerable
  13744. * string keyed property of `object` thru `iteratee`. The iteratee is invoked
  13745. * with three arguments: (value, key, object).
  13746. *
  13747. * @static
  13748. * @memberOf _
  13749. * @since 3.8.0
  13750. * @category Object
  13751. * @param {Object} object The object to iterate over.
  13752. * @param {Function} [iteratee=_.identity] The function invoked per iteration.
  13753. * @returns {Object} Returns the new mapped object.
  13754. * @see _.mapValues
  13755. * @example
  13756. *
  13757. * _.mapKeys({ 'a': 1, 'b': 2 }, function(value, key) {
  13758. * return key + value;
  13759. * });
  13760. * // => { 'a1': 1, 'b2': 2 }
  13761. */
  13762. function mapKeys(object, iteratee) {
  13763. var result = {};
  13764. iteratee = getIteratee(iteratee, 3);
  13765. baseForOwn(object, function(value, key, object) {
  13766. baseAssignValue(result, iteratee(value, key, object), value);
  13767. });
  13768. return result;
  13769. }
  13770. /**
  13771. * Creates an object with the same keys as `object` and values generated
  13772. * by running each own enumerable string keyed property of `object` thru
  13773. * `iteratee`. The iteratee is invoked with three arguments:
  13774. * (value, key, object).
  13775. *
  13776. * @static
  13777. * @memberOf _
  13778. * @since 2.4.0
  13779. * @category Object
  13780. * @param {Object} object The object to iterate over.
  13781. * @param {Function} [iteratee=_.identity] The function invoked per iteration.
  13782. * @returns {Object} Returns the new mapped object.
  13783. * @see _.mapKeys
  13784. * @example
  13785. *
  13786. * var users = {
  13787. * 'fred': { 'user': 'fred', 'age': 40 },
  13788. * 'pebbles': { 'user': 'pebbles', 'age': 1 }
  13789. * };
  13790. *
  13791. * _.mapValues(users, function(o) { return o.age; });
  13792. * // => { 'fred': 40, 'pebbles': 1 } (iteration order is not guaranteed)
  13793. *
  13794. * // The `_.property` iteratee shorthand.
  13795. * _.mapValues(users, 'age');
  13796. * // => { 'fred': 40, 'pebbles': 1 } (iteration order is not guaranteed)
  13797. */
  13798. function mapValues(object, iteratee) {
  13799. var result = {};
  13800. iteratee = getIteratee(iteratee, 3);
  13801. baseForOwn(object, function(value, key, object) {
  13802. baseAssignValue(result, key, iteratee(value, key, object));
  13803. });
  13804. return result;
  13805. }
  13806. /**
  13807. * This method is like `_.assign` except that it recursively merges own and
  13808. * inherited enumerable string keyed properties of source objects into the
  13809. * destination object. Source properties that resolve to `undefined` are
  13810. * skipped if a destination value exists. Array and plain object properties
  13811. * are merged recursively. Other objects and value types are overridden by
  13812. * assignment. Source objects are applied from left to right. Subsequent
  13813. * sources overwrite property assignments of previous sources.
  13814. *
  13815. * **Note:** This method mutates `object`.
  13816. *
  13817. * @static
  13818. * @memberOf _
  13819. * @since 0.5.0
  13820. * @category Object
  13821. * @param {Object} object The destination object.
  13822. * @param {...Object} [sources] The source objects.
  13823. * @returns {Object} Returns `object`.
  13824. * @example
  13825. *
  13826. * var object = {
  13827. * 'a': [{ 'b': 2 }, { 'd': 4 }]
  13828. * };
  13829. *
  13830. * var other = {
  13831. * 'a': [{ 'c': 3 }, { 'e': 5 }]
  13832. * };
  13833. *
  13834. * _.merge(object, other);
  13835. * // => { 'a': [{ 'b': 2, 'c': 3 }, { 'd': 4, 'e': 5 }] }
  13836. */
  13837. var merge = createAssigner(function(object, source, srcIndex) {
  13838. baseMerge(object, source, srcIndex);
  13839. });
  13840. /**
  13841. * This method is like `_.merge` except that it accepts `customizer` which
  13842. * is invoked to produce the merged values of the destination and source
  13843. * properties. If `customizer` returns `undefined`, merging is handled by the
  13844. * method instead. The `customizer` is invoked with six arguments:
  13845. * (objValue, srcValue, key, object, source, stack).
  13846. *
  13847. * **Note:** This method mutates `object`.
  13848. *
  13849. * @static
  13850. * @memberOf _
  13851. * @since 4.0.0
  13852. * @category Object
  13853. * @param {Object} object The destination object.
  13854. * @param {...Object} sources The source objects.
  13855. * @param {Function} customizer The function to customize assigned values.
  13856. * @returns {Object} Returns `object`.
  13857. * @example
  13858. *
  13859. * function customizer(objValue, srcValue) {
  13860. * if (_.isArray(objValue)) {
  13861. * return objValue.concat(srcValue);
  13862. * }
  13863. * }
  13864. *
  13865. * var object = { 'a': [1], 'b': [2] };
  13866. * var other = { 'a': [3], 'b': [4] };
  13867. *
  13868. * _.mergeWith(object, other, customizer);
  13869. * // => { 'a': [1, 3], 'b': [2, 4] }
  13870. */
  13871. var mergeWith = createAssigner(function(object, source, srcIndex, customizer) {
  13872. baseMerge(object, source, srcIndex, customizer);
  13873. });
  13874. /**
  13875. * The opposite of `_.pick`; this method creates an object composed of the
  13876. * own and inherited enumerable property paths of `object` that are not omitted.
  13877. *
  13878. * **Note:** This method is considerably slower than `_.pick`.
  13879. *
  13880. * @static
  13881. * @since 0.1.0
  13882. * @memberOf _
  13883. * @category Object
  13884. * @param {Object} object The source object.
  13885. * @param {...(string|string[])} [paths] The property paths to omit.
  13886. * @returns {Object} Returns the new object.
  13887. * @example
  13888. *
  13889. * var object = { 'a': 1, 'b': '2', 'c': 3 };
  13890. *
  13891. * _.omit(object, ['a', 'c']);
  13892. * // => { 'b': '2' }
  13893. */
  13894. var omit = flatRest(function(object, paths) {
  13895. var result = {};
  13896. if (object == null) {
  13897. return result;
  13898. }
  13899. var isDeep = false;
  13900. paths = arrayMap(paths, function(path) {
  13901. path = castPath(path, object);
  13902. isDeep || (isDeep = path.length > 1);
  13903. return path;
  13904. });
  13905. copyObject(object, getAllKeysIn(object), result);
  13906. if (isDeep) {
  13907. result = baseClone(result, CLONE_DEEP_FLAG | CLONE_FLAT_FLAG | CLONE_SYMBOLS_FLAG, customOmitClone);
  13908. }
  13909. var length = paths.length;
  13910. while (length--) {
  13911. baseUnset(result, paths[length]);
  13912. }
  13913. return result;
  13914. });
  13915. /**
  13916. * The opposite of `_.pickBy`; this method creates an object composed of
  13917. * the own and inherited enumerable string keyed properties of `object` that
  13918. * `predicate` doesn't return truthy for. The predicate is invoked with two
  13919. * arguments: (value, key).
  13920. *
  13921. * @static
  13922. * @memberOf _
  13923. * @since 4.0.0
  13924. * @category Object
  13925. * @param {Object} object The source object.
  13926. * @param {Function} [predicate=_.identity] The function invoked per property.
  13927. * @returns {Object} Returns the new object.
  13928. * @example
  13929. *
  13930. * var object = { 'a': 1, 'b': '2', 'c': 3 };
  13931. *
  13932. * _.omitBy(object, _.isNumber);
  13933. * // => { 'b': '2' }
  13934. */
  13935. function omitBy(object, predicate) {
  13936. return pickBy(object, negate(getIteratee(predicate)));
  13937. }
  13938. /**
  13939. * Creates an object composed of the picked `object` properties.
  13940. *
  13941. * @static
  13942. * @since 0.1.0
  13943. * @memberOf _
  13944. * @category Object
  13945. * @param {Object} object The source object.
  13946. * @param {...(string|string[])} [paths] The property paths to pick.
  13947. * @returns {Object} Returns the new object.
  13948. * @example
  13949. *
  13950. * var object = { 'a': 1, 'b': '2', 'c': 3 };
  13951. *
  13952. * _.pick(object, ['a', 'c']);
  13953. * // => { 'a': 1, 'c': 3 }
  13954. */
  13955. var pick = flatRest(function(object, paths) {
  13956. return object == null ? {} : basePick(object, paths);
  13957. });
  13958. /**
  13959. * Creates an object composed of the `object` properties `predicate` returns
  13960. * truthy for. The predicate is invoked with two arguments: (value, key).
  13961. *
  13962. * @static
  13963. * @memberOf _
  13964. * @since 4.0.0
  13965. * @category Object
  13966. * @param {Object} object The source object.
  13967. * @param {Function} [predicate=_.identity] The function invoked per property.
  13968. * @returns {Object} Returns the new object.
  13969. * @example
  13970. *
  13971. * var object = { 'a': 1, 'b': '2', 'c': 3 };
  13972. *
  13973. * _.pickBy(object, _.isNumber);
  13974. * // => { 'a': 1, 'c': 3 }
  13975. */
  13976. function pickBy(object, predicate) {
  13977. if (object == null) {
  13978. return {};
  13979. }
  13980. var props = arrayMap(getAllKeysIn(object), function(prop) {
  13981. return [prop];
  13982. });
  13983. predicate = getIteratee(predicate);
  13984. return basePickBy(object, props, function(value, path) {
  13985. return predicate(value, path[0]);
  13986. });
  13987. }
  13988. /**
  13989. * This method is like `_.get` except that if the resolved value is a
  13990. * function it's invoked with the `this` binding of its parent object and
  13991. * its result is returned.
  13992. *
  13993. * @static
  13994. * @since 0.1.0
  13995. * @memberOf _
  13996. * @category Object
  13997. * @param {Object} object The object to query.
  13998. * @param {Array|string} path The path of the property to resolve.
  13999. * @param {*} [defaultValue] The value returned for `undefined` resolved values.
  14000. * @returns {*} Returns the resolved value.
  14001. * @example
  14002. *
  14003. * var object = { 'a': [{ 'b': { 'c1': 3, 'c2': _.constant(4) } }] };
  14004. *
  14005. * _.result(object, 'a[0].b.c1');
  14006. * // => 3
  14007. *
  14008. * _.result(object, 'a[0].b.c2');
  14009. * // => 4
  14010. *
  14011. * _.result(object, 'a[0].b.c3', 'default');
  14012. * // => 'default'
  14013. *
  14014. * _.result(object, 'a[0].b.c3', _.constant('default'));
  14015. * // => 'default'
  14016. */
  14017. function result(object, path, defaultValue) {
  14018. path = castPath(path, object);
  14019. var index = -1,
  14020. length = path.length;
  14021. // Ensure the loop is entered when path is empty.
  14022. if (!length) {
  14023. length = 1;
  14024. object = undefined;
  14025. }
  14026. while (++index < length) {
  14027. var value = object == null ? undefined : object[toKey(path[index])];
  14028. if (value === undefined) {
  14029. index = length;
  14030. value = defaultValue;
  14031. }
  14032. object = isFunction(value) ? value.call(object) : value;
  14033. }
  14034. return object;
  14035. }
  14036. /**
  14037. * Sets the value at `path` of `object`. If a portion of `path` doesn't exist,
  14038. * it's created. Arrays are created for missing index properties while objects
  14039. * are created for all other missing properties. Use `_.setWith` to customize
  14040. * `path` creation.
  14041. *
  14042. * **Note:** This method mutates `object`.
  14043. *
  14044. * @static
  14045. * @memberOf _
  14046. * @since 3.7.0
  14047. * @category Object
  14048. * @param {Object} object The object to modify.
  14049. * @param {Array|string} path The path of the property to set.
  14050. * @param {*} value The value to set.
  14051. * @returns {Object} Returns `object`.
  14052. * @example
  14053. *
  14054. * var object = { 'a': [{ 'b': { 'c': 3 } }] };
  14055. *
  14056. * _.set(object, 'a[0].b.c', 4);
  14057. * console.log(object.a[0].b.c);
  14058. * // => 4
  14059. *
  14060. * _.set(object, ['x', '0', 'y', 'z'], 5);
  14061. * console.log(object.x[0].y.z);
  14062. * // => 5
  14063. */
  14064. function set(object, path, value) {
  14065. return object == null ? object : baseSet(object, path, value);
  14066. }
  14067. /**
  14068. * This method is like `_.set` except that it accepts `customizer` which is
  14069. * invoked to produce the objects of `path`. If `customizer` returns `undefined`
  14070. * path creation is handled by the method instead. The `customizer` is invoked
  14071. * with three arguments: (nsValue, key, nsObject).
  14072. *
  14073. * **Note:** This method mutates `object`.
  14074. *
  14075. * @static
  14076. * @memberOf _
  14077. * @since 4.0.0
  14078. * @category Object
  14079. * @param {Object} object The object to modify.
  14080. * @param {Array|string} path The path of the property to set.
  14081. * @param {*} value The value to set.
  14082. * @param {Function} [customizer] The function to customize assigned values.
  14083. * @returns {Object} Returns `object`.
  14084. * @example
  14085. *
  14086. * var object = {};
  14087. *
  14088. * _.setWith(object, '[0][1]', 'a', Object);
  14089. * // => { '0': { '1': 'a' } }
  14090. */
  14091. function setWith(object, path, value, customizer) {
  14092. customizer = typeof customizer == 'function' ? customizer : undefined;
  14093. return object == null ? object : baseSet(object, path, value, customizer);
  14094. }
  14095. /**
  14096. * Creates an array of own enumerable string keyed-value pairs for `object`
  14097. * which can be consumed by `_.fromPairs`. If `object` is a map or set, its
  14098. * entries are returned.
  14099. *
  14100. * @static
  14101. * @memberOf _
  14102. * @since 4.0.0
  14103. * @alias entries
  14104. * @category Object
  14105. * @param {Object} object The object to query.
  14106. * @returns {Array} Returns the key-value pairs.
  14107. * @example
  14108. *
  14109. * function Foo() {
  14110. * this.a = 1;
  14111. * this.b = 2;
  14112. * }
  14113. *
  14114. * Foo.prototype.c = 3;
  14115. *
  14116. * _.toPairs(new Foo);
  14117. * // => [['a', 1], ['b', 2]] (iteration order is not guaranteed)
  14118. */
  14119. var toPairs = createToPairs(keys);
  14120. /**
  14121. * Creates an array of own and inherited enumerable string keyed-value pairs
  14122. * for `object` which can be consumed by `_.fromPairs`. If `object` is a map
  14123. * or set, its entries are returned.
  14124. *
  14125. * @static
  14126. * @memberOf _
  14127. * @since 4.0.0
  14128. * @alias entriesIn
  14129. * @category Object
  14130. * @param {Object} object The object to query.
  14131. * @returns {Array} Returns the key-value pairs.
  14132. * @example
  14133. *
  14134. * function Foo() {
  14135. * this.a = 1;
  14136. * this.b = 2;
  14137. * }
  14138. *
  14139. * Foo.prototype.c = 3;
  14140. *
  14141. * _.toPairsIn(new Foo);
  14142. * // => [['a', 1], ['b', 2], ['c', 3]] (iteration order is not guaranteed)
  14143. */
  14144. var toPairsIn = createToPairs(keysIn);
  14145. /**
  14146. * An alternative to `_.reduce`; this method transforms `object` to a new
  14147. * `accumulator` object which is the result of running each of its own
  14148. * enumerable string keyed properties thru `iteratee`, with each invocation
  14149. * potentially mutating the `accumulator` object. If `accumulator` is not
  14150. * provided, a new object with the same `[[Prototype]]` will be used. The
  14151. * iteratee is invoked with four arguments: (accumulator, value, key, object).
  14152. * Iteratee functions may exit iteration early by explicitly returning `false`.
  14153. *
  14154. * @static
  14155. * @memberOf _
  14156. * @since 1.3.0
  14157. * @category Object
  14158. * @param {Object} object The object to iterate over.
  14159. * @param {Function} [iteratee=_.identity] The function invoked per iteration.
  14160. * @param {*} [accumulator] The custom accumulator value.
  14161. * @returns {*} Returns the accumulated value.
  14162. * @example
  14163. *
  14164. * _.transform([2, 3, 4], function(result, n) {
  14165. * result.push(n *= n);
  14166. * return n % 2 == 0;
  14167. * }, []);
  14168. * // => [4, 9]
  14169. *
  14170. * _.transform({ 'a': 1, 'b': 2, 'c': 1 }, function(result, value, key) {
  14171. * (result[value] || (result[value] = [])).push(key);
  14172. * }, {});
  14173. * // => { '1': ['a', 'c'], '2': ['b'] }
  14174. */
  14175. function transform(object, iteratee, accumulator) {
  14176. var isArr = isArray(object),
  14177. isArrLike = isArr || isBuffer(object) || isTypedArray(object);
  14178. iteratee = getIteratee(iteratee, 4);
  14179. if (accumulator == null) {
  14180. var Ctor = object && object.constructor;
  14181. if (isArrLike) {
  14182. accumulator = isArr ? new Ctor : [];
  14183. }
  14184. else if (isObject(object)) {
  14185. accumulator = isFunction(Ctor) ? baseCreate(getPrototype(object)) : {};
  14186. }
  14187. else {
  14188. accumulator = {};
  14189. }
  14190. }
  14191. (isArrLike ? arrayEach : baseForOwn)(object, function(value, index, object) {
  14192. return iteratee(accumulator, value, index, object);
  14193. });
  14194. return accumulator;
  14195. }
  14196. /**
  14197. * Removes the property at `path` of `object`.
  14198. *
  14199. * **Note:** This method mutates `object`.
  14200. *
  14201. * @static
  14202. * @memberOf _
  14203. * @since 4.0.0
  14204. * @category Object
  14205. * @param {Object} object The object to modify.
  14206. * @param {Array|string} path The path of the property to unset.
  14207. * @returns {boolean} Returns `true` if the property is deleted, else `false`.
  14208. * @example
  14209. *
  14210. * var object = { 'a': [{ 'b': { 'c': 7 } }] };
  14211. * _.unset(object, 'a[0].b.c');
  14212. * // => true
  14213. *
  14214. * console.log(object);
  14215. * // => { 'a': [{ 'b': {} }] };
  14216. *
  14217. * _.unset(object, ['a', '0', 'b', 'c']);
  14218. * // => true
  14219. *
  14220. * console.log(object);
  14221. * // => { 'a': [{ 'b': {} }] };
  14222. */
  14223. function unset(object, path) {
  14224. return object == null ? true : baseUnset(object, path);
  14225. }
  14226. /**
  14227. * This method is like `_.set` except that accepts `updater` to produce the
  14228. * value to set. Use `_.updateWith` to customize `path` creation. The `updater`
  14229. * is invoked with one argument: (value).
  14230. *
  14231. * **Note:** This method mutates `object`.
  14232. *
  14233. * @static
  14234. * @memberOf _
  14235. * @since 4.6.0
  14236. * @category Object
  14237. * @param {Object} object The object to modify.
  14238. * @param {Array|string} path The path of the property to set.
  14239. * @param {Function} updater The function to produce the updated value.
  14240. * @returns {Object} Returns `object`.
  14241. * @example
  14242. *
  14243. * var object = { 'a': [{ 'b': { 'c': 3 } }] };
  14244. *
  14245. * _.update(object, 'a[0].b.c', function(n) { return n * n; });
  14246. * console.log(object.a[0].b.c);
  14247. * // => 9
  14248. *
  14249. * _.update(object, 'x[0].y.z', function(n) { return n ? n + 1 : 0; });
  14250. * console.log(object.x[0].y.z);
  14251. * // => 0
  14252. */
  14253. function update(object, path, updater) {
  14254. return object == null ? object : baseUpdate(object, path, castFunction(updater));
  14255. }
  14256. /**
  14257. * This method is like `_.update` except that it accepts `customizer` which is
  14258. * invoked to produce the objects of `path`. If `customizer` returns `undefined`
  14259. * path creation is handled by the method instead. The `customizer` is invoked
  14260. * with three arguments: (nsValue, key, nsObject).
  14261. *
  14262. * **Note:** This method mutates `object`.
  14263. *
  14264. * @static
  14265. * @memberOf _
  14266. * @since 4.6.0
  14267. * @category Object
  14268. * @param {Object} object The object to modify.
  14269. * @param {Array|string} path The path of the property to set.
  14270. * @param {Function} updater The function to produce the updated value.
  14271. * @param {Function} [customizer] The function to customize assigned values.
  14272. * @returns {Object} Returns `object`.
  14273. * @example
  14274. *
  14275. * var object = {};
  14276. *
  14277. * _.updateWith(object, '[0][1]', _.constant('a'), Object);
  14278. * // => { '0': { '1': 'a' } }
  14279. */
  14280. function updateWith(object, path, updater, customizer) {
  14281. customizer = typeof customizer == 'function' ? customizer : undefined;
  14282. return object == null ? object : baseUpdate(object, path, castFunction(updater), customizer);
  14283. }
  14284. /**
  14285. * Creates an array of the own enumerable string keyed property values of `object`.
  14286. *
  14287. * **Note:** Non-object values are coerced to objects.
  14288. *
  14289. * @static
  14290. * @since 0.1.0
  14291. * @memberOf _
  14292. * @category Object
  14293. * @param {Object} object The object to query.
  14294. * @returns {Array} Returns the array of property values.
  14295. * @example
  14296. *
  14297. * function Foo() {
  14298. * this.a = 1;
  14299. * this.b = 2;
  14300. * }
  14301. *
  14302. * Foo.prototype.c = 3;
  14303. *
  14304. * _.values(new Foo);
  14305. * // => [1, 2] (iteration order is not guaranteed)
  14306. *
  14307. * _.values('hi');
  14308. * // => ['h', 'i']
  14309. */
  14310. function values(object) {
  14311. return object == null ? [] : baseValues(object, keys(object));
  14312. }
  14313. /**
  14314. * Creates an array of the own and inherited enumerable string keyed property
  14315. * values of `object`.
  14316. *
  14317. * **Note:** Non-object values are coerced to objects.
  14318. *
  14319. * @static
  14320. * @memberOf _
  14321. * @since 3.0.0
  14322. * @category Object
  14323. * @param {Object} object The object to query.
  14324. * @returns {Array} Returns the array of property values.
  14325. * @example
  14326. *
  14327. * function Foo() {
  14328. * this.a = 1;
  14329. * this.b = 2;
  14330. * }
  14331. *
  14332. * Foo.prototype.c = 3;
  14333. *
  14334. * _.valuesIn(new Foo);
  14335. * // => [1, 2, 3] (iteration order is not guaranteed)
  14336. */
  14337. function valuesIn(object) {
  14338. return object == null ? [] : baseValues(object, keysIn(object));
  14339. }
  14340. /*------------------------------------------------------------------------*/
  14341. /**
  14342. * Clamps `number` within the inclusive `lower` and `upper` bounds.
  14343. *
  14344. * @static
  14345. * @memberOf _
  14346. * @since 4.0.0
  14347. * @category Number
  14348. * @param {number} number The number to clamp.
  14349. * @param {number} [lower] The lower bound.
  14350. * @param {number} upper The upper bound.
  14351. * @returns {number} Returns the clamped number.
  14352. * @example
  14353. *
  14354. * _.clamp(-10, -5, 5);
  14355. * // => -5
  14356. *
  14357. * _.clamp(10, -5, 5);
  14358. * // => 5
  14359. */
  14360. function clamp(number, lower, upper) {
  14361. if (upper === undefined) {
  14362. upper = lower;
  14363. lower = undefined;
  14364. }
  14365. if (upper !== undefined) {
  14366. upper = toNumber(upper);
  14367. upper = upper === upper ? upper : 0;
  14368. }
  14369. if (lower !== undefined) {
  14370. lower = toNumber(lower);
  14371. lower = lower === lower ? lower : 0;
  14372. }
  14373. return baseClamp(toNumber(number), lower, upper);
  14374. }
  14375. /**
  14376. * Checks if `n` is between `start` and up to, but not including, `end`. If
  14377. * `end` is not specified, it's set to `start` with `start` then set to `0`.
  14378. * If `start` is greater than `end` the params are swapped to support
  14379. * negative ranges.
  14380. *
  14381. * @static
  14382. * @memberOf _
  14383. * @since 3.3.0
  14384. * @category Number
  14385. * @param {number} number The number to check.
  14386. * @param {number} [start=0] The start of the range.
  14387. * @param {number} end The end of the range.
  14388. * @returns {boolean} Returns `true` if `number` is in the range, else `false`.
  14389. * @see _.range, _.rangeRight
  14390. * @example
  14391. *
  14392. * _.inRange(3, 2, 4);
  14393. * // => true
  14394. *
  14395. * _.inRange(4, 8);
  14396. * // => true
  14397. *
  14398. * _.inRange(4, 2);
  14399. * // => false
  14400. *
  14401. * _.inRange(2, 2);
  14402. * // => false
  14403. *
  14404. * _.inRange(1.2, 2);
  14405. * // => true
  14406. *
  14407. * _.inRange(5.2, 4);
  14408. * // => false
  14409. *
  14410. * _.inRange(-3, -2, -6);
  14411. * // => true
  14412. */
  14413. function inRange(number, start, end) {
  14414. start = toFinite(start);
  14415. if (end === undefined) {
  14416. end = start;
  14417. start = 0;
  14418. } else {
  14419. end = toFinite(end);
  14420. }
  14421. number = toNumber(number);
  14422. return baseInRange(number, start, end);
  14423. }
  14424. /**
  14425. * Produces a random number between the inclusive `lower` and `upper` bounds.
  14426. * If only one argument is provided a number between `0` and the given number
  14427. * is returned. If `floating` is `true`, or either `lower` or `upper` are
  14428. * floats, a floating-point number is returned instead of an integer.
  14429. *
  14430. * **Note:** JavaScript follows the IEEE-754 standard for resolving
  14431. * floating-point values which can produce unexpected results.
  14432. *
  14433. * @static
  14434. * @memberOf _
  14435. * @since 0.7.0
  14436. * @category Number
  14437. * @param {number} [lower=0] The lower bound.
  14438. * @param {number} [upper=1] The upper bound.
  14439. * @param {boolean} [floating] Specify returning a floating-point number.
  14440. * @returns {number} Returns the random number.
  14441. * @example
  14442. *
  14443. * _.random(0, 5);
  14444. * // => an integer between 0 and 5
  14445. *
  14446. * _.random(5);
  14447. * // => also an integer between 0 and 5
  14448. *
  14449. * _.random(5, true);
  14450. * // => a floating-point number between 0 and 5
  14451. *
  14452. * _.random(1.2, 5.2);
  14453. * // => a floating-point number between 1.2 and 5.2
  14454. */
  14455. function random(lower, upper, floating) {
  14456. if (floating && typeof floating != 'boolean' && isIterateeCall(lower, upper, floating)) {
  14457. upper = floating = undefined;
  14458. }
  14459. if (floating === undefined) {
  14460. if (typeof upper == 'boolean') {
  14461. floating = upper;
  14462. upper = undefined;
  14463. }
  14464. else if (typeof lower == 'boolean') {
  14465. floating = lower;
  14466. lower = undefined;
  14467. }
  14468. }
  14469. if (lower === undefined && upper === undefined) {
  14470. lower = 0;
  14471. upper = 1;
  14472. }
  14473. else {
  14474. lower = toFinite(lower);
  14475. if (upper === undefined) {
  14476. upper = lower;
  14477. lower = 0;
  14478. } else {
  14479. upper = toFinite(upper);
  14480. }
  14481. }
  14482. if (lower > upper) {
  14483. var temp = lower;
  14484. lower = upper;
  14485. upper = temp;
  14486. }
  14487. if (floating || lower % 1 || upper % 1) {
  14488. var rand = nativeRandom();
  14489. return nativeMin(lower + (rand * (upper - lower + freeParseFloat('1e-' + ((rand + '').length - 1)))), upper);
  14490. }
  14491. return baseRandom(lower, upper);
  14492. }
  14493. /*------------------------------------------------------------------------*/
  14494. /**
  14495. * Converts `string` to [camel case](https://en.wikipedia.org/wiki/CamelCase).
  14496. *
  14497. * @static
  14498. * @memberOf _
  14499. * @since 3.0.0
  14500. * @category String
  14501. * @param {string} [string=''] The string to convert.
  14502. * @returns {string} Returns the camel cased string.
  14503. * @example
  14504. *
  14505. * _.camelCase('Foo Bar');
  14506. * // => 'fooBar'
  14507. *
  14508. * _.camelCase('--foo-bar--');
  14509. * // => 'fooBar'
  14510. *
  14511. * _.camelCase('__FOO_BAR__');
  14512. * // => 'fooBar'
  14513. */
  14514. var camelCase = createCompounder(function(result, word, index) {
  14515. word = word.toLowerCase();
  14516. return result + (index ? capitalize(word) : word);
  14517. });
  14518. /**
  14519. * Converts the first character of `string` to upper case and the remaining
  14520. * to lower case.
  14521. *
  14522. * @static
  14523. * @memberOf _
  14524. * @since 3.0.0
  14525. * @category String
  14526. * @param {string} [string=''] The string to capitalize.
  14527. * @returns {string} Returns the capitalized string.
  14528. * @example
  14529. *
  14530. * _.capitalize('FRED');
  14531. * // => 'Fred'
  14532. */
  14533. function capitalize(string) {
  14534. return upperFirst(toString(string).toLowerCase());
  14535. }
  14536. /**
  14537. * Deburrs `string` by converting
  14538. * [Latin-1 Supplement](https://en.wikipedia.org/wiki/Latin-1_Supplement_(Unicode_block)#Character_table)
  14539. * and [Latin Extended-A](https://en.wikipedia.org/wiki/Latin_Extended-A)
  14540. * letters to basic Latin letters and removing
  14541. * [combining diacritical marks](https://en.wikipedia.org/wiki/Combining_Diacritical_Marks).
  14542. *
  14543. * @static
  14544. * @memberOf _
  14545. * @since 3.0.0
  14546. * @category String
  14547. * @param {string} [string=''] The string to deburr.
  14548. * @returns {string} Returns the deburred string.
  14549. * @example
  14550. *
  14551. * _.deburr('déjà vu');
  14552. * // => 'deja vu'
  14553. */
  14554. function deburr(string) {
  14555. string = toString(string);
  14556. return string && string.replace(reLatin, deburrLetter).replace(reComboMark, '');
  14557. }
  14558. /**
  14559. * Checks if `string` ends with the given target string.
  14560. *
  14561. * @static
  14562. * @memberOf _
  14563. * @since 3.0.0
  14564. * @category String
  14565. * @param {string} [string=''] The string to inspect.
  14566. * @param {string} [target] The string to search for.
  14567. * @param {number} [position=string.length] The position to search up to.
  14568. * @returns {boolean} Returns `true` if `string` ends with `target`,
  14569. * else `false`.
  14570. * @example
  14571. *
  14572. * _.endsWith('abc', 'c');
  14573. * // => true
  14574. *
  14575. * _.endsWith('abc', 'b');
  14576. * // => false
  14577. *
  14578. * _.endsWith('abc', 'b', 2);
  14579. * // => true
  14580. */
  14581. function endsWith(string, target, position) {
  14582. string = toString(string);
  14583. target = baseToString(target);
  14584. var length = string.length;
  14585. position = position === undefined
  14586. ? length
  14587. : baseClamp(toInteger(position), 0, length);
  14588. var end = position;
  14589. position -= target.length;
  14590. return position >= 0 && string.slice(position, end) == target;
  14591. }
  14592. /**
  14593. * Converts the characters "&", "<", ">", '"', and "'" in `string` to their
  14594. * corresponding HTML entities.
  14595. *
  14596. * **Note:** No other characters are escaped. To escape additional
  14597. * characters use a third-party library like [_he_](https://mths.be/he).
  14598. *
  14599. * Though the ">" character is escaped for symmetry, characters like
  14600. * ">" and "/" don't need escaping in HTML and have no special meaning
  14601. * unless they're part of a tag or unquoted attribute value. See
  14602. * [Mathias Bynens's article](https://mathiasbynens.be/notes/ambiguous-ampersands)
  14603. * (under "semi-related fun fact") for more details.
  14604. *
  14605. * When working with HTML you should always
  14606. * [quote attribute values](http://wonko.com/post/html-escaping) to reduce
  14607. * XSS vectors.
  14608. *
  14609. * @static
  14610. * @since 0.1.0
  14611. * @memberOf _
  14612. * @category String
  14613. * @param {string} [string=''] The string to escape.
  14614. * @returns {string} Returns the escaped string.
  14615. * @example
  14616. *
  14617. * _.escape('fred, barney, & pebbles');
  14618. * // => 'fred, barney, &amp; pebbles'
  14619. */
  14620. function escape(string) {
  14621. string = toString(string);
  14622. return (string && reHasUnescapedHtml.test(string))
  14623. ? string.replace(reUnescapedHtml, escapeHtmlChar)
  14624. : string;
  14625. }
  14626. /**
  14627. * Escapes the `RegExp` special characters "^", "$", "\", ".", "*", "+",
  14628. * "?", "(", ")", "[", "]", "{", "}", and "|" in `string`.
  14629. *
  14630. * @static
  14631. * @memberOf _
  14632. * @since 3.0.0
  14633. * @category String
  14634. * @param {string} [string=''] The string to escape.
  14635. * @returns {string} Returns the escaped string.
  14636. * @example
  14637. *
  14638. * _.escapeRegExp('[lodash](https://lodash.com/)');
  14639. * // => '\[lodash\]\(https://lodash\.com/\)'
  14640. */
  14641. function escapeRegExp(string) {
  14642. string = toString(string);
  14643. return (string && reHasRegExpChar.test(string))
  14644. ? string.replace(reRegExpChar, '\\$&')
  14645. : string;
  14646. }
  14647. /**
  14648. * Converts `string` to
  14649. * [kebab case](https://en.wikipedia.org/wiki/Letter_case#Special_case_styles).
  14650. *
  14651. * @static
  14652. * @memberOf _
  14653. * @since 3.0.0
  14654. * @category String
  14655. * @param {string} [string=''] The string to convert.
  14656. * @returns {string} Returns the kebab cased string.
  14657. * @example
  14658. *
  14659. * _.kebabCase('Foo Bar');
  14660. * // => 'foo-bar'
  14661. *
  14662. * _.kebabCase('fooBar');
  14663. * // => 'foo-bar'
  14664. *
  14665. * _.kebabCase('__FOO_BAR__');
  14666. * // => 'foo-bar'
  14667. */
  14668. var kebabCase = createCompounder(function(result, word, index) {
  14669. return result + (index ? '-' : '') + word.toLowerCase();
  14670. });
  14671. /**
  14672. * Converts `string`, as space separated words, to lower case.
  14673. *
  14674. * @static
  14675. * @memberOf _
  14676. * @since 4.0.0
  14677. * @category String
  14678. * @param {string} [string=''] The string to convert.
  14679. * @returns {string} Returns the lower cased string.
  14680. * @example
  14681. *
  14682. * _.lowerCase('--Foo-Bar--');
  14683. * // => 'foo bar'
  14684. *
  14685. * _.lowerCase('fooBar');
  14686. * // => 'foo bar'
  14687. *
  14688. * _.lowerCase('__FOO_BAR__');
  14689. * // => 'foo bar'
  14690. */
  14691. var lowerCase = createCompounder(function(result, word, index) {
  14692. return result + (index ? ' ' : '') + word.toLowerCase();
  14693. });
  14694. /**
  14695. * Converts the first character of `string` to lower case.
  14696. *
  14697. * @static
  14698. * @memberOf _
  14699. * @since 4.0.0
  14700. * @category String
  14701. * @param {string} [string=''] The string to convert.
  14702. * @returns {string} Returns the converted string.
  14703. * @example
  14704. *
  14705. * _.lowerFirst('Fred');
  14706. * // => 'fred'
  14707. *
  14708. * _.lowerFirst('FRED');
  14709. * // => 'fRED'
  14710. */
  14711. var lowerFirst = createCaseFirst('toLowerCase');
  14712. /**
  14713. * Pads `string` on the left and right sides if it's shorter than `length`.
  14714. * Padding characters are truncated if they can't be evenly divided by `length`.
  14715. *
  14716. * @static
  14717. * @memberOf _
  14718. * @since 3.0.0
  14719. * @category String
  14720. * @param {string} [string=''] The string to pad.
  14721. * @param {number} [length=0] The padding length.
  14722. * @param {string} [chars=' '] The string used as padding.
  14723. * @returns {string} Returns the padded string.
  14724. * @example
  14725. *
  14726. * _.pad('abc', 8);
  14727. * // => ' abc '
  14728. *
  14729. * _.pad('abc', 8, '_-');
  14730. * // => '_-abc_-_'
  14731. *
  14732. * _.pad('abc', 3);
  14733. * // => 'abc'
  14734. */
  14735. function pad(string, length, chars) {
  14736. string = toString(string);
  14737. length = toInteger(length);
  14738. var strLength = length ? stringSize(string) : 0;
  14739. if (!length || strLength >= length) {
  14740. return string;
  14741. }
  14742. var mid = (length - strLength) / 2;
  14743. return (
  14744. createPadding(nativeFloor(mid), chars) +
  14745. string +
  14746. createPadding(nativeCeil(mid), chars)
  14747. );
  14748. }
  14749. /**
  14750. * Pads `string` on the right side if it's shorter than `length`. Padding
  14751. * characters are truncated if they exceed `length`.
  14752. *
  14753. * @static
  14754. * @memberOf _
  14755. * @since 4.0.0
  14756. * @category String
  14757. * @param {string} [string=''] The string to pad.
  14758. * @param {number} [length=0] The padding length.
  14759. * @param {string} [chars=' '] The string used as padding.
  14760. * @returns {string} Returns the padded string.
  14761. * @example
  14762. *
  14763. * _.padEnd('abc', 6);
  14764. * // => 'abc '
  14765. *
  14766. * _.padEnd('abc', 6, '_-');
  14767. * // => 'abc_-_'
  14768. *
  14769. * _.padEnd('abc', 3);
  14770. * // => 'abc'
  14771. */
  14772. function padEnd(string, length, chars) {
  14773. string = toString(string);
  14774. length = toInteger(length);
  14775. var strLength = length ? stringSize(string) : 0;
  14776. return (length && strLength < length)
  14777. ? (string + createPadding(length - strLength, chars))
  14778. : string;
  14779. }
  14780. /**
  14781. * Pads `string` on the left side if it's shorter than `length`. Padding
  14782. * characters are truncated if they exceed `length`.
  14783. *
  14784. * @static
  14785. * @memberOf _
  14786. * @since 4.0.0
  14787. * @category String
  14788. * @param {string} [string=''] The string to pad.
  14789. * @param {number} [length=0] The padding length.
  14790. * @param {string} [chars=' '] The string used as padding.
  14791. * @returns {string} Returns the padded string.
  14792. * @example
  14793. *
  14794. * _.padStart('abc', 6);
  14795. * // => ' abc'
  14796. *
  14797. * _.padStart('abc', 6, '_-');
  14798. * // => '_-_abc'
  14799. *
  14800. * _.padStart('abc', 3);
  14801. * // => 'abc'
  14802. */
  14803. function padStart(string, length, chars) {
  14804. string = toString(string);
  14805. length = toInteger(length);
  14806. var strLength = length ? stringSize(string) : 0;
  14807. return (length && strLength < length)
  14808. ? (createPadding(length - strLength, chars) + string)
  14809. : string;
  14810. }
  14811. /**
  14812. * Converts `string` to an integer of the specified radix. If `radix` is
  14813. * `undefined` or `0`, a `radix` of `10` is used unless `value` is a
  14814. * hexadecimal, in which case a `radix` of `16` is used.
  14815. *
  14816. * **Note:** This method aligns with the
  14817. * [ES5 implementation](https://es5.github.io/#x15.1.2.2) of `parseInt`.
  14818. *
  14819. * @static
  14820. * @memberOf _
  14821. * @since 1.1.0
  14822. * @category String
  14823. * @param {string} string The string to convert.
  14824. * @param {number} [radix=10] The radix to interpret `value` by.
  14825. * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
  14826. * @returns {number} Returns the converted integer.
  14827. * @example
  14828. *
  14829. * _.parseInt('08');
  14830. * // => 8
  14831. *
  14832. * _.map(['6', '08', '10'], _.parseInt);
  14833. * // => [6, 8, 10]
  14834. */
  14835. function parseInt(string, radix, guard) {
  14836. if (guard || radix == null) {
  14837. radix = 0;
  14838. } else if (radix) {
  14839. radix = +radix;
  14840. }
  14841. return nativeParseInt(toString(string).replace(reTrimStart, ''), radix || 0);
  14842. }
  14843. /**
  14844. * Repeats the given string `n` times.
  14845. *
  14846. * @static
  14847. * @memberOf _
  14848. * @since 3.0.0
  14849. * @category String
  14850. * @param {string} [string=''] The string to repeat.
  14851. * @param {number} [n=1] The number of times to repeat the string.
  14852. * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
  14853. * @returns {string} Returns the repeated string.
  14854. * @example
  14855. *
  14856. * _.repeat('*', 3);
  14857. * // => '***'
  14858. *
  14859. * _.repeat('abc', 2);
  14860. * // => 'abcabc'
  14861. *
  14862. * _.repeat('abc', 0);
  14863. * // => ''
  14864. */
  14865. function repeat(string, n, guard) {
  14866. if ((guard ? isIterateeCall(string, n, guard) : n === undefined)) {
  14867. n = 1;
  14868. } else {
  14869. n = toInteger(n);
  14870. }
  14871. return baseRepeat(toString(string), n);
  14872. }
  14873. /**
  14874. * Replaces matches for `pattern` in `string` with `replacement`.
  14875. *
  14876. * **Note:** This method is based on
  14877. * [`String#replace`](https://mdn.io/String/replace).
  14878. *
  14879. * @static
  14880. * @memberOf _
  14881. * @since 4.0.0
  14882. * @category String
  14883. * @param {string} [string=''] The string to modify.
  14884. * @param {RegExp|string} pattern The pattern to replace.
  14885. * @param {Function|string} replacement The match replacement.
  14886. * @returns {string} Returns the modified string.
  14887. * @example
  14888. *
  14889. * _.replace('Hi Fred', 'Fred', 'Barney');
  14890. * // => 'Hi Barney'
  14891. */
  14892. function replace() {
  14893. var args = arguments,
  14894. string = toString(args[0]);
  14895. return args.length < 3 ? string : string.replace(args[1], args[2]);
  14896. }
  14897. /**
  14898. * Converts `string` to
  14899. * [snake case](https://en.wikipedia.org/wiki/Snake_case).
  14900. *
  14901. * @static
  14902. * @memberOf _
  14903. * @since 3.0.0
  14904. * @category String
  14905. * @param {string} [string=''] The string to convert.
  14906. * @returns {string} Returns the snake cased string.
  14907. * @example
  14908. *
  14909. * _.snakeCase('Foo Bar');
  14910. * // => 'foo_bar'
  14911. *
  14912. * _.snakeCase('fooBar');
  14913. * // => 'foo_bar'
  14914. *
  14915. * _.snakeCase('--FOO-BAR--');
  14916. * // => 'foo_bar'
  14917. */
  14918. var snakeCase = createCompounder(function(result, word, index) {
  14919. return result + (index ? '_' : '') + word.toLowerCase();
  14920. });
  14921. /**
  14922. * Splits `string` by `separator`.
  14923. *
  14924. * **Note:** This method is based on
  14925. * [`String#split`](https://mdn.io/String/split).
  14926. *
  14927. * @static
  14928. * @memberOf _
  14929. * @since 4.0.0
  14930. * @category String
  14931. * @param {string} [string=''] The string to split.
  14932. * @param {RegExp|string} separator The separator pattern to split by.
  14933. * @param {number} [limit] The length to truncate results to.
  14934. * @returns {Array} Returns the string segments.
  14935. * @example
  14936. *
  14937. * _.split('a-b-c', '-', 2);
  14938. * // => ['a', 'b']
  14939. */
  14940. function split(string, separator, limit) {
  14941. if (limit && typeof limit != 'number' && isIterateeCall(string, separator, limit)) {
  14942. separator = limit = undefined;
  14943. }
  14944. limit = limit === undefined ? MAX_ARRAY_LENGTH : limit >>> 0;
  14945. if (!limit) {
  14946. return [];
  14947. }
  14948. string = toString(string);
  14949. if (string && (
  14950. typeof separator == 'string' ||
  14951. (separator != null && !isRegExp(separator))
  14952. )) {
  14953. separator = baseToString(separator);
  14954. if (!separator && hasUnicode(string)) {
  14955. return castSlice(stringToArray(string), 0, limit);
  14956. }
  14957. }
  14958. return string.split(separator, limit);
  14959. }
  14960. /**
  14961. * Converts `string` to
  14962. * [start case](https://en.wikipedia.org/wiki/Letter_case#Stylistic_or_specialised_usage).
  14963. *
  14964. * @static
  14965. * @memberOf _
  14966. * @since 3.1.0
  14967. * @category String
  14968. * @param {string} [string=''] The string to convert.
  14969. * @returns {string} Returns the start cased string.
  14970. * @example
  14971. *
  14972. * _.startCase('--foo-bar--');
  14973. * // => 'Foo Bar'
  14974. *
  14975. * _.startCase('fooBar');
  14976. * // => 'Foo Bar'
  14977. *
  14978. * _.startCase('__FOO_BAR__');
  14979. * // => 'FOO BAR'
  14980. */
  14981. var startCase = createCompounder(function(result, word, index) {
  14982. return result + (index ? ' ' : '') + upperFirst(word);
  14983. });
  14984. /**
  14985. * Checks if `string` starts with the given target string.
  14986. *
  14987. * @static
  14988. * @memberOf _
  14989. * @since 3.0.0
  14990. * @category String
  14991. * @param {string} [string=''] The string to inspect.
  14992. * @param {string} [target] The string to search for.
  14993. * @param {number} [position=0] The position to search from.
  14994. * @returns {boolean} Returns `true` if `string` starts with `target`,
  14995. * else `false`.
  14996. * @example
  14997. *
  14998. * _.startsWith('abc', 'a');
  14999. * // => true
  15000. *
  15001. * _.startsWith('abc', 'b');
  15002. * // => false
  15003. *
  15004. * _.startsWith('abc', 'b', 1);
  15005. * // => true
  15006. */
  15007. function startsWith(string, target, position) {
  15008. string = toString(string);
  15009. position = position == null
  15010. ? 0
  15011. : baseClamp(toInteger(position), 0, string.length);
  15012. target = baseToString(target);
  15013. return string.slice(position, position + target.length) == target;
  15014. }
  15015. /**
  15016. * Creates a compiled template function that can interpolate data properties
  15017. * in "interpolate" delimiters, HTML-escape interpolated data properties in
  15018. * "escape" delimiters, and execute JavaScript in "evaluate" delimiters. Data
  15019. * properties may be accessed as free variables in the template. If a setting
  15020. * object is given, it takes precedence over `_.templateSettings` values.
  15021. *
  15022. * **Note:** In the development build `_.template` utilizes
  15023. * [sourceURLs](http://www.html5rocks.com/en/tutorials/developertools/sourcemaps/#toc-sourceurl)
  15024. * for easier debugging.
  15025. *
  15026. * For more information on precompiling templates see
  15027. * [lodash's custom builds documentation](https://lodash.com/custom-builds).
  15028. *
  15029. * For more information on Chrome extension sandboxes see
  15030. * [Chrome's extensions documentation](https://developer.chrome.com/extensions/sandboxingEval).
  15031. *
  15032. * @static
  15033. * @since 0.1.0
  15034. * @memberOf _
  15035. * @category String
  15036. * @param {string} [string=''] The template string.
  15037. * @param {Object} [options={}] The options object.
  15038. * @param {RegExp} [options.escape=_.templateSettings.escape]
  15039. * The HTML "escape" delimiter.
  15040. * @param {RegExp} [options.evaluate=_.templateSettings.evaluate]
  15041. * The "evaluate" delimiter.
  15042. * @param {Object} [options.imports=_.templateSettings.imports]
  15043. * An object to import into the template as free variables.
  15044. * @param {RegExp} [options.interpolate=_.templateSettings.interpolate]
  15045. * The "interpolate" delimiter.
  15046. * @param {string} [options.sourceURL='lodash.templateSources[n]']
  15047. * The sourceURL of the compiled template.
  15048. * @param {string} [options.variable='obj']
  15049. * The data object variable name.
  15050. * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
  15051. * @returns {Function} Returns the compiled template function.
  15052. * @example
  15053. *
  15054. * // Use the "interpolate" delimiter to create a compiled template.
  15055. * var compiled = _.template('hello <%= user %>!');
  15056. * compiled({ 'user': 'fred' });
  15057. * // => 'hello fred!'
  15058. *
  15059. * // Use the HTML "escape" delimiter to escape data property values.
  15060. * var compiled = _.template('<b><%- value %></b>');
  15061. * compiled({ 'value': '<script>' });
  15062. * // => '<b>&lt;script&gt;</b>'
  15063. *
  15064. * // Use the "evaluate" delimiter to execute JavaScript and generate HTML.
  15065. * var compiled = _.template('<% _.forEach(users, function(user) { %><li><%- user %></li><% }); %>');
  15066. * compiled({ 'users': ['fred', 'barney'] });
  15067. * // => '<li>fred</li><li>barney</li>'
  15068. *
  15069. * // Use the internal `print` function in "evaluate" delimiters.
  15070. * var compiled = _.template('<% print("hello " + user); %>!');
  15071. * compiled({ 'user': 'barney' });
  15072. * // => 'hello barney!'
  15073. *
  15074. * // Use the ES template literal delimiter as an "interpolate" delimiter.
  15075. * // Disable support by replacing the "interpolate" delimiter.
  15076. * var compiled = _.template('hello ${ user }!');
  15077. * compiled({ 'user': 'pebbles' });
  15078. * // => 'hello pebbles!'
  15079. *
  15080. * // Use backslashes to treat delimiters as plain text.
  15081. * var compiled = _.template('<%= "\\<%- value %\\>" %>');
  15082. * compiled({ 'value': 'ignored' });
  15083. * // => '<%- value %>'
  15084. *
  15085. * // Use the `imports` option to import `jQuery` as `jq`.
  15086. * var text = '<% jq.each(users, function(user) { %><li><%- user %></li><% }); %>';
  15087. * var compiled = _.template(text, { 'imports': { 'jq': jQuery } });
  15088. * compiled({ 'users': ['fred', 'barney'] });
  15089. * // => '<li>fred</li><li>barney</li>'
  15090. *
  15091. * // Use the `sourceURL` option to specify a custom sourceURL for the template.
  15092. * var compiled = _.template('hello <%= user %>!', { 'sourceURL': '/basic/greeting.jst' });
  15093. * compiled(data);
  15094. * // => Find the source of "greeting.jst" under the Sources tab or Resources panel of the web inspector.
  15095. *
  15096. * // Use the `variable` option to ensure a with-statement isn't used in the compiled template.
  15097. * var compiled = _.template('hi <%= data.user %>!', { 'variable': 'data' });
  15098. * compiled.source;
  15099. * // => function(data) {
  15100. * // var __t, __p = '';
  15101. * // __p += 'hi ' + ((__t = ( data.user )) == null ? '' : __t) + '!';
  15102. * // return __p;
  15103. * // }
  15104. *
  15105. * // Use custom template delimiters.
  15106. * _.templateSettings.interpolate = /{{([\s\S]+?)}}/g;
  15107. * var compiled = _.template('hello {{ user }}!');
  15108. * compiled({ 'user': 'mustache' });
  15109. * // => 'hello mustache!'
  15110. *
  15111. * // Use the `source` property to inline compiled templates for meaningful
  15112. * // line numbers in error messages and stack traces.
  15113. * fs.writeFileSync(path.join(process.cwd(), 'jst.js'), '\
  15114. * var JST = {\
  15115. * "main": ' + _.template(mainText).source + '\
  15116. * };\
  15117. * ');
  15118. */
  15119. function template(string, options, guard) {
  15120. // Based on John Resig's `tmpl` implementation
  15121. // (http://ejohn.org/blog/javascript-micro-templating/)
  15122. // and Laura Doktorova's doT.js (https://github.com/olado/doT).
  15123. var settings = lodash.templateSettings;
  15124. if (guard && isIterateeCall(string, options, guard)) {
  15125. options = undefined;
  15126. }
  15127. string = toString(string);
  15128. options = assignInWith({}, options, settings, customDefaultsAssignIn);
  15129. var imports = assignInWith({}, options.imports, settings.imports, customDefaultsAssignIn),
  15130. importsKeys = keys(imports),
  15131. importsValues = baseValues(imports, importsKeys);
  15132. var isEscaping,
  15133. isEvaluating,
  15134. index = 0,
  15135. interpolate = options.interpolate || reNoMatch,
  15136. source = "__p += '";
  15137. // Compile the regexp to match each delimiter.
  15138. var reDelimiters = RegExp(
  15139. (options.escape || reNoMatch).source + '|' +
  15140. interpolate.source + '|' +
  15141. (interpolate === reInterpolate ? reEsTemplate : reNoMatch).source + '|' +
  15142. (options.evaluate || reNoMatch).source + '|$'
  15143. , 'g');
  15144. // Use a sourceURL for easier debugging.
  15145. var sourceURL = '//# sourceURL=' +
  15146. ('sourceURL' in options
  15147. ? options.sourceURL
  15148. : ('lodash.templateSources[' + (++templateCounter) + ']')
  15149. ) + '\n';
  15150. string.replace(reDelimiters, function(match, escapeValue, interpolateValue, esTemplateValue, evaluateValue, offset) {
  15151. interpolateValue || (interpolateValue = esTemplateValue);
  15152. // Escape characters that can't be included in string literals.
  15153. source += string.slice(index, offset).replace(reUnescapedString, escapeStringChar);
  15154. // Replace delimiters with snippets.
  15155. if (escapeValue) {
  15156. isEscaping = true;
  15157. source += "' +\n__e(" + escapeValue + ") +\n'";
  15158. }
  15159. if (evaluateValue) {
  15160. isEvaluating = true;
  15161. source += "';\n" + evaluateValue + ";\n__p += '";
  15162. }
  15163. if (interpolateValue) {
  15164. source += "' +\n((__t = (" + interpolateValue + ")) == null ? '' : __t) +\n'";
  15165. }
  15166. index = offset + match.length;
  15167. // The JS engine embedded in Adobe products needs `match` returned in
  15168. // order to produce the correct `offset` value.
  15169. return match;
  15170. });
  15171. source += "';\n";
  15172. // If `variable` is not specified wrap a with-statement around the generated
  15173. // code to add the data object to the top of the scope chain.
  15174. var variable = options.variable;
  15175. if (!variable) {
  15176. source = 'with (obj) {\n' + source + '\n}\n';
  15177. }
  15178. // Cleanup code by stripping empty strings.
  15179. source = (isEvaluating ? source.replace(reEmptyStringLeading, '') : source)
  15180. .replace(reEmptyStringMiddle, '$1')
  15181. .replace(reEmptyStringTrailing, '$1;');
  15182. // Frame code as the function body.
  15183. source = 'function(' + (variable || 'obj') + ') {\n' +
  15184. (variable
  15185. ? ''
  15186. : 'obj || (obj = {});\n'
  15187. ) +
  15188. "var __t, __p = ''" +
  15189. (isEscaping
  15190. ? ', __e = _.escape'
  15191. : ''
  15192. ) +
  15193. (isEvaluating
  15194. ? ', __j = Array.prototype.join;\n' +
  15195. "function print() { __p += __j.call(arguments, '') }\n"
  15196. : ';\n'
  15197. ) +
  15198. source +
  15199. 'return __p\n}';
  15200. var result = attempt(function() {
  15201. return Function(importsKeys, sourceURL + 'return ' + source)
  15202. .apply(undefined, importsValues);
  15203. });
  15204. // Provide the compiled function's source by its `toString` method or
  15205. // the `source` property as a convenience for inlining compiled templates.
  15206. result.source = source;
  15207. if (isError(result)) {
  15208. throw result;
  15209. }
  15210. return result;
  15211. }
  15212. /**
  15213. * Converts `string`, as a whole, to lower case just like
  15214. * [String#toLowerCase](https://mdn.io/toLowerCase).
  15215. *
  15216. * @static
  15217. * @memberOf _
  15218. * @since 4.0.0
  15219. * @category String
  15220. * @param {string} [string=''] The string to convert.
  15221. * @returns {string} Returns the lower cased string.
  15222. * @example
  15223. *
  15224. * _.toLower('--Foo-Bar--');
  15225. * // => '--foo-bar--'
  15226. *
  15227. * _.toLower('fooBar');
  15228. * // => 'foobar'
  15229. *
  15230. * _.toLower('__FOO_BAR__');
  15231. * // => '__foo_bar__'
  15232. */
  15233. function toLower(value) {
  15234. return toString(value).toLowerCase();
  15235. }
  15236. /**
  15237. * Converts `string`, as a whole, to upper case just like
  15238. * [String#toUpperCase](https://mdn.io/toUpperCase).
  15239. *
  15240. * @static
  15241. * @memberOf _
  15242. * @since 4.0.0
  15243. * @category String
  15244. * @param {string} [string=''] The string to convert.
  15245. * @returns {string} Returns the upper cased string.
  15246. * @example
  15247. *
  15248. * _.toUpper('--foo-bar--');
  15249. * // => '--FOO-BAR--'
  15250. *
  15251. * _.toUpper('fooBar');
  15252. * // => 'FOOBAR'
  15253. *
  15254. * _.toUpper('__foo_bar__');
  15255. * // => '__FOO_BAR__'
  15256. */
  15257. function toUpper(value) {
  15258. return toString(value).toUpperCase();
  15259. }
  15260. /**
  15261. * Removes leading and trailing whitespace or specified characters from `string`.
  15262. *
  15263. * @static
  15264. * @memberOf _
  15265. * @since 3.0.0
  15266. * @category String
  15267. * @param {string} [string=''] The string to trim.
  15268. * @param {string} [chars=whitespace] The characters to trim.
  15269. * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
  15270. * @returns {string} Returns the trimmed string.
  15271. * @example
  15272. *
  15273. * _.trim(' abc ');
  15274. * // => 'abc'
  15275. *
  15276. * _.trim('-_-abc-_-', '_-');
  15277. * // => 'abc'
  15278. *
  15279. * _.map([' foo ', ' bar '], _.trim);
  15280. * // => ['foo', 'bar']
  15281. */
  15282. function trim(string, chars, guard) {
  15283. string = toString(string);
  15284. if (string && (guard || chars === undefined)) {
  15285. return string.replace(reTrim, '');
  15286. }
  15287. if (!string || !(chars = baseToString(chars))) {
  15288. return string;
  15289. }
  15290. var strSymbols = stringToArray(string),
  15291. chrSymbols = stringToArray(chars),
  15292. start = charsStartIndex(strSymbols, chrSymbols),
  15293. end = charsEndIndex(strSymbols, chrSymbols) + 1;
  15294. return castSlice(strSymbols, start, end).join('');
  15295. }
  15296. /**
  15297. * Removes trailing whitespace or specified characters from `string`.
  15298. *
  15299. * @static
  15300. * @memberOf _
  15301. * @since 4.0.0
  15302. * @category String
  15303. * @param {string} [string=''] The string to trim.
  15304. * @param {string} [chars=whitespace] The characters to trim.
  15305. * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
  15306. * @returns {string} Returns the trimmed string.
  15307. * @example
  15308. *
  15309. * _.trimEnd(' abc ');
  15310. * // => ' abc'
  15311. *
  15312. * _.trimEnd('-_-abc-_-', '_-');
  15313. * // => '-_-abc'
  15314. */
  15315. function trimEnd(string, chars, guard) {
  15316. string = toString(string);
  15317. if (string && (guard || chars === undefined)) {
  15318. return string.replace(reTrimEnd, '');
  15319. }
  15320. if (!string || !(chars = baseToString(chars))) {
  15321. return string;
  15322. }
  15323. var strSymbols = stringToArray(string),
  15324. end = charsEndIndex(strSymbols, stringToArray(chars)) + 1;
  15325. return castSlice(strSymbols, 0, end).join('');
  15326. }
  15327. /**
  15328. * Removes leading whitespace or specified characters from `string`.
  15329. *
  15330. * @static
  15331. * @memberOf _
  15332. * @since 4.0.0
  15333. * @category String
  15334. * @param {string} [string=''] The string to trim.
  15335. * @param {string} [chars=whitespace] The characters to trim.
  15336. * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
  15337. * @returns {string} Returns the trimmed string.
  15338. * @example
  15339. *
  15340. * _.trimStart(' abc ');
  15341. * // => 'abc '
  15342. *
  15343. * _.trimStart('-_-abc-_-', '_-');
  15344. * // => 'abc-_-'
  15345. */
  15346. function trimStart(string, chars, guard) {
  15347. string = toString(string);
  15348. if (string && (guard || chars === undefined)) {
  15349. return string.replace(reTrimStart, '');
  15350. }
  15351. if (!string || !(chars = baseToString(chars))) {
  15352. return string;
  15353. }
  15354. var strSymbols = stringToArray(string),
  15355. start = charsStartIndex(strSymbols, stringToArray(chars));
  15356. return castSlice(strSymbols, start).join('');
  15357. }
  15358. /**
  15359. * Truncates `string` if it's longer than the given maximum string length.
  15360. * The last characters of the truncated string are replaced with the omission
  15361. * string which defaults to "...".
  15362. *
  15363. * @static
  15364. * @memberOf _
  15365. * @since 4.0.0
  15366. * @category String
  15367. * @param {string} [string=''] The string to truncate.
  15368. * @param {Object} [options={}] The options object.
  15369. * @param {number} [options.length=30] The maximum string length.
  15370. * @param {string} [options.omission='...'] The string to indicate text is omitted.
  15371. * @param {RegExp|string} [options.separator] The separator pattern to truncate to.
  15372. * @returns {string} Returns the truncated string.
  15373. * @example
  15374. *
  15375. * _.truncate('hi-diddly-ho there, neighborino');
  15376. * // => 'hi-diddly-ho there, neighbo...'
  15377. *
  15378. * _.truncate('hi-diddly-ho there, neighborino', {
  15379. * 'length': 24,
  15380. * 'separator': ' '
  15381. * });
  15382. * // => 'hi-diddly-ho there,...'
  15383. *
  15384. * _.truncate('hi-diddly-ho there, neighborino', {
  15385. * 'length': 24,
  15386. * 'separator': /,? +/
  15387. * });
  15388. * // => 'hi-diddly-ho there...'
  15389. *
  15390. * _.truncate('hi-diddly-ho there, neighborino', {
  15391. * 'omission': ' [...]'
  15392. * });
  15393. * // => 'hi-diddly-ho there, neig [...]'
  15394. */
  15395. function truncate(string, options) {
  15396. var length = DEFAULT_TRUNC_LENGTH,
  15397. omission = DEFAULT_TRUNC_OMISSION;
  15398. if (isObject(options)) {
  15399. var separator = 'separator' in options ? options.separator : separator;
  15400. length = 'length' in options ? toInteger(options.length) : length;
  15401. omission = 'omission' in options ? baseToString(options.omission) : omission;
  15402. }
  15403. string = toString(string);
  15404. var strLength = string.length;
  15405. if (hasUnicode(string)) {
  15406. var strSymbols = stringToArray(string);
  15407. strLength = strSymbols.length;
  15408. }
  15409. if (length >= strLength) {
  15410. return string;
  15411. }
  15412. var end = length - stringSize(omission);
  15413. if (end < 1) {
  15414. return omission;
  15415. }
  15416. var result = strSymbols
  15417. ? castSlice(strSymbols, 0, end).join('')
  15418. : string.slice(0, end);
  15419. if (separator === undefined) {
  15420. return result + omission;
  15421. }
  15422. if (strSymbols) {
  15423. end += (result.length - end);
  15424. }
  15425. if (isRegExp(separator)) {
  15426. if (string.slice(end).search(separator)) {
  15427. var match,
  15428. substring = result;
  15429. if (!separator.global) {
  15430. separator = RegExp(separator.source, toString(reFlags.exec(separator)) + 'g');
  15431. }
  15432. separator.lastIndex = 0;
  15433. while ((match = separator.exec(substring))) {
  15434. var newEnd = match.index;
  15435. }
  15436. result = result.slice(0, newEnd === undefined ? end : newEnd);
  15437. }
  15438. } else if (string.indexOf(baseToString(separator), end) != end) {
  15439. var index = result.lastIndexOf(separator);
  15440. if (index > -1) {
  15441. result = result.slice(0, index);
  15442. }
  15443. }
  15444. return result + omission;
  15445. }
  15446. /**
  15447. * The inverse of `_.escape`; this method converts the HTML entities
  15448. * `&amp;`, `&lt;`, `&gt;`, `&quot;`, and `&#39;` in `string` to
  15449. * their corresponding characters.
  15450. *
  15451. * **Note:** No other HTML entities are unescaped. To unescape additional
  15452. * HTML entities use a third-party library like [_he_](https://mths.be/he).
  15453. *
  15454. * @static
  15455. * @memberOf _
  15456. * @since 0.6.0
  15457. * @category String
  15458. * @param {string} [string=''] The string to unescape.
  15459. * @returns {string} Returns the unescaped string.
  15460. * @example
  15461. *
  15462. * _.unescape('fred, barney, &amp; pebbles');
  15463. * // => 'fred, barney, & pebbles'
  15464. */
  15465. function unescape(string) {
  15466. string = toString(string);
  15467. return (string && reHasEscapedHtml.test(string))
  15468. ? string.replace(reEscapedHtml, unescapeHtmlChar)
  15469. : string;
  15470. }
  15471. /**
  15472. * Converts `string`, as space separated words, to upper case.
  15473. *
  15474. * @static
  15475. * @memberOf _
  15476. * @since 4.0.0
  15477. * @category String
  15478. * @param {string} [string=''] The string to convert.
  15479. * @returns {string} Returns the upper cased string.
  15480. * @example
  15481. *
  15482. * _.upperCase('--foo-bar');
  15483. * // => 'FOO BAR'
  15484. *
  15485. * _.upperCase('fooBar');
  15486. * // => 'FOO BAR'
  15487. *
  15488. * _.upperCase('__foo_bar__');
  15489. * // => 'FOO BAR'
  15490. */
  15491. var upperCase = createCompounder(function(result, word, index) {
  15492. return result + (index ? ' ' : '') + word.toUpperCase();
  15493. });
  15494. /**
  15495. * Converts the first character of `string` to upper case.
  15496. *
  15497. * @static
  15498. * @memberOf _
  15499. * @since 4.0.0
  15500. * @category String
  15501. * @param {string} [string=''] The string to convert.
  15502. * @returns {string} Returns the converted string.
  15503. * @example
  15504. *
  15505. * _.upperFirst('fred');
  15506. * // => 'Fred'
  15507. *
  15508. * _.upperFirst('FRED');
  15509. * // => 'FRED'
  15510. */
  15511. var upperFirst = createCaseFirst('toUpperCase');
  15512. /**
  15513. * Splits `string` into an array of its words.
  15514. *
  15515. * @static
  15516. * @memberOf _
  15517. * @since 3.0.0
  15518. * @category String
  15519. * @param {string} [string=''] The string to inspect.
  15520. * @param {RegExp|string} [pattern] The pattern to match words.
  15521. * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
  15522. * @returns {Array} Returns the words of `string`.
  15523. * @example
  15524. *
  15525. * _.words('fred, barney, & pebbles');
  15526. * // => ['fred', 'barney', 'pebbles']
  15527. *
  15528. * _.words('fred, barney, & pebbles', /[^, ]+/g);
  15529. * // => ['fred', 'barney', '&', 'pebbles']
  15530. */
  15531. function words(string, pattern, guard) {
  15532. string = toString(string);
  15533. pattern = guard ? undefined : pattern;
  15534. if (pattern === undefined) {
  15535. return hasUnicodeWord(string) ? unicodeWords(string) : asciiWords(string);
  15536. }
  15537. return string.match(pattern) || [];
  15538. }
  15539. /*------------------------------------------------------------------------*/
  15540. /**
  15541. * Attempts to invoke `func`, returning either the result or the caught error
  15542. * object. Any additional arguments are provided to `func` when it's invoked.
  15543. *
  15544. * @static
  15545. * @memberOf _
  15546. * @since 3.0.0
  15547. * @category Util
  15548. * @param {Function} func The function to attempt.
  15549. * @param {...*} [args] The arguments to invoke `func` with.
  15550. * @returns {*} Returns the `func` result or error object.
  15551. * @example
  15552. *
  15553. * // Avoid throwing errors for invalid selectors.
  15554. * var elements = _.attempt(function(selector) {
  15555. * return document.querySelectorAll(selector);
  15556. * }, '>_>');
  15557. *
  15558. * if (_.isError(elements)) {
  15559. * elements = [];
  15560. * }
  15561. */
  15562. var attempt = baseRest(function(func, args) {
  15563. try {
  15564. return apply(func, undefined, args);
  15565. } catch (e) {
  15566. return isError(e) ? e : new Error(e);
  15567. }
  15568. });
  15569. /**
  15570. * Binds methods of an object to the object itself, overwriting the existing
  15571. * method.
  15572. *
  15573. * **Note:** This method doesn't set the "length" property of bound functions.
  15574. *
  15575. * @static
  15576. * @since 0.1.0
  15577. * @memberOf _
  15578. * @category Util
  15579. * @param {Object} object The object to bind and assign the bound methods to.
  15580. * @param {...(string|string[])} methodNames The object method names to bind.
  15581. * @returns {Object} Returns `object`.
  15582. * @example
  15583. *
  15584. * var view = {
  15585. * 'label': 'docs',
  15586. * 'click': function() {
  15587. * console.log('clicked ' + this.label);
  15588. * }
  15589. * };
  15590. *
  15591. * _.bindAll(view, ['click']);
  15592. * jQuery(element).on('click', view.click);
  15593. * // => Logs 'clicked docs' when clicked.
  15594. */
  15595. var bindAll = flatRest(function(object, methodNames) {
  15596. arrayEach(methodNames, function(key) {
  15597. key = toKey(key);
  15598. baseAssignValue(object, key, bind(object[key], object));
  15599. });
  15600. return object;
  15601. });
  15602. /**
  15603. * Creates a function that iterates over `pairs` and invokes the corresponding
  15604. * function of the first predicate to return truthy. The predicate-function
  15605. * pairs are invoked with the `this` binding and arguments of the created
  15606. * function.
  15607. *
  15608. * @static
  15609. * @memberOf _
  15610. * @since 4.0.0
  15611. * @category Util
  15612. * @param {Array} pairs The predicate-function pairs.
  15613. * @returns {Function} Returns the new composite function.
  15614. * @example
  15615. *
  15616. * var func = _.cond([
  15617. * [_.matches({ 'a': 1 }), _.constant('matches A')],
  15618. * [_.conforms({ 'b': _.isNumber }), _.constant('matches B')],
  15619. * [_.stubTrue, _.constant('no match')]
  15620. * ]);
  15621. *
  15622. * func({ 'a': 1, 'b': 2 });
  15623. * // => 'matches A'
  15624. *
  15625. * func({ 'a': 0, 'b': 1 });
  15626. * // => 'matches B'
  15627. *
  15628. * func({ 'a': '1', 'b': '2' });
  15629. * // => 'no match'
  15630. */
  15631. function cond(pairs) {
  15632. var length = pairs == null ? 0 : pairs.length,
  15633. toIteratee = getIteratee();
  15634. pairs = !length ? [] : arrayMap(pairs, function(pair) {
  15635. if (typeof pair[1] != 'function') {
  15636. throw new TypeError(FUNC_ERROR_TEXT);
  15637. }
  15638. return [toIteratee(pair[0]), pair[1]];
  15639. });
  15640. return baseRest(function(args) {
  15641. var index = -1;
  15642. while (++index < length) {
  15643. var pair = pairs[index];
  15644. if (apply(pair[0], this, args)) {
  15645. return apply(pair[1], this, args);
  15646. }
  15647. }
  15648. });
  15649. }
  15650. /**
  15651. * Creates a function that invokes the predicate properties of `source` with
  15652. * the corresponding property values of a given object, returning `true` if
  15653. * all predicates return truthy, else `false`.
  15654. *
  15655. * **Note:** The created function is equivalent to `_.conformsTo` with
  15656. * `source` partially applied.
  15657. *
  15658. * @static
  15659. * @memberOf _
  15660. * @since 4.0.0
  15661. * @category Util
  15662. * @param {Object} source The object of property predicates to conform to.
  15663. * @returns {Function} Returns the new spec function.
  15664. * @example
  15665. *
  15666. * var objects = [
  15667. * { 'a': 2, 'b': 1 },
  15668. * { 'a': 1, 'b': 2 }
  15669. * ];
  15670. *
  15671. * _.filter(objects, _.conforms({ 'b': function(n) { return n > 1; } }));
  15672. * // => [{ 'a': 1, 'b': 2 }]
  15673. */
  15674. function conforms(source) {
  15675. return baseConforms(baseClone(source, CLONE_DEEP_FLAG));
  15676. }
  15677. /**
  15678. * Creates a function that returns `value`.
  15679. *
  15680. * @static
  15681. * @memberOf _
  15682. * @since 2.4.0
  15683. * @category Util
  15684. * @param {*} value The value to return from the new function.
  15685. * @returns {Function} Returns the new constant function.
  15686. * @example
  15687. *
  15688. * var objects = _.times(2, _.constant({ 'a': 1 }));
  15689. *
  15690. * console.log(objects);
  15691. * // => [{ 'a': 1 }, { 'a': 1 }]
  15692. *
  15693. * console.log(objects[0] === objects[1]);
  15694. * // => true
  15695. */
  15696. function constant(value) {
  15697. return function() {
  15698. return value;
  15699. };
  15700. }
  15701. /**
  15702. * Checks `value` to determine whether a default value should be returned in
  15703. * its place. The `defaultValue` is returned if `value` is `NaN`, `null`,
  15704. * or `undefined`.
  15705. *
  15706. * @static
  15707. * @memberOf _
  15708. * @since 4.14.0
  15709. * @category Util
  15710. * @param {*} value The value to check.
  15711. * @param {*} defaultValue The default value.
  15712. * @returns {*} Returns the resolved value.
  15713. * @example
  15714. *
  15715. * _.defaultTo(1, 10);
  15716. * // => 1
  15717. *
  15718. * _.defaultTo(undefined, 10);
  15719. * // => 10
  15720. */
  15721. function defaultTo(value, defaultValue) {
  15722. return (value == null || value !== value) ? defaultValue : value;
  15723. }
  15724. /**
  15725. * Creates a function that returns the result of invoking the given functions
  15726. * with the `this` binding of the created function, where each successive
  15727. * invocation is supplied the return value of the previous.
  15728. *
  15729. * @static
  15730. * @memberOf _
  15731. * @since 3.0.0
  15732. * @category Util
  15733. * @param {...(Function|Function[])} [funcs] The functions to invoke.
  15734. * @returns {Function} Returns the new composite function.
  15735. * @see _.flowRight
  15736. * @example
  15737. *
  15738. * function square(n) {
  15739. * return n * n;
  15740. * }
  15741. *
  15742. * var addSquare = _.flow([_.add, square]);
  15743. * addSquare(1, 2);
  15744. * // => 9
  15745. */
  15746. var flow = createFlow();
  15747. /**
  15748. * This method is like `_.flow` except that it creates a function that
  15749. * invokes the given functions from right to left.
  15750. *
  15751. * @static
  15752. * @since 3.0.0
  15753. * @memberOf _
  15754. * @category Util
  15755. * @param {...(Function|Function[])} [funcs] The functions to invoke.
  15756. * @returns {Function} Returns the new composite function.
  15757. * @see _.flow
  15758. * @example
  15759. *
  15760. * function square(n) {
  15761. * return n * n;
  15762. * }
  15763. *
  15764. * var addSquare = _.flowRight([square, _.add]);
  15765. * addSquare(1, 2);
  15766. * // => 9
  15767. */
  15768. var flowRight = createFlow(true);
  15769. /**
  15770. * This method returns the first argument it receives.
  15771. *
  15772. * @static
  15773. * @since 0.1.0
  15774. * @memberOf _
  15775. * @category Util
  15776. * @param {*} value Any value.
  15777. * @returns {*} Returns `value`.
  15778. * @example
  15779. *
  15780. * var object = { 'a': 1 };
  15781. *
  15782. * console.log(_.identity(object) === object);
  15783. * // => true
  15784. */
  15785. function identity(value) {
  15786. return value;
  15787. }
  15788. /**
  15789. * Creates a function that invokes `func` with the arguments of the created
  15790. * function. If `func` is a property name, the created function returns the
  15791. * property value for a given element. If `func` is an array or object, the
  15792. * created function returns `true` for elements that contain the equivalent
  15793. * source properties, otherwise it returns `false`.
  15794. *
  15795. * @static
  15796. * @since 4.0.0
  15797. * @memberOf _
  15798. * @category Util
  15799. * @param {*} [func=_.identity] The value to convert to a callback.
  15800. * @returns {Function} Returns the callback.
  15801. * @example
  15802. *
  15803. * var users = [
  15804. * { 'user': 'barney', 'age': 36, 'active': true },
  15805. * { 'user': 'fred', 'age': 40, 'active': false }
  15806. * ];
  15807. *
  15808. * // The `_.matches` iteratee shorthand.
  15809. * _.filter(users, _.iteratee({ 'user': 'barney', 'active': true }));
  15810. * // => [{ 'user': 'barney', 'age': 36, 'active': true }]
  15811. *
  15812. * // The `_.matchesProperty` iteratee shorthand.
  15813. * _.filter(users, _.iteratee(['user', 'fred']));
  15814. * // => [{ 'user': 'fred', 'age': 40 }]
  15815. *
  15816. * // The `_.property` iteratee shorthand.
  15817. * _.map(users, _.iteratee('user'));
  15818. * // => ['barney', 'fred']
  15819. *
  15820. * // Create custom iteratee shorthands.
  15821. * _.iteratee = _.wrap(_.iteratee, function(iteratee, func) {
  15822. * return !_.isRegExp(func) ? iteratee(func) : function(string) {
  15823. * return func.test(string);
  15824. * };
  15825. * });
  15826. *
  15827. * _.filter(['abc', 'def'], /ef/);
  15828. * // => ['def']
  15829. */
  15830. function iteratee(func) {
  15831. return baseIteratee(typeof func == 'function' ? func : baseClone(func, CLONE_DEEP_FLAG));
  15832. }
  15833. /**
  15834. * Creates a function that performs a partial deep comparison between a given
  15835. * object and `source`, returning `true` if the given object has equivalent
  15836. * property values, else `false`.
  15837. *
  15838. * **Note:** The created function is equivalent to `_.isMatch` with `source`
  15839. * partially applied.
  15840. *
  15841. * Partial comparisons will match empty array and empty object `source`
  15842. * values against any array or object value, respectively. See `_.isEqual`
  15843. * for a list of supported value comparisons.
  15844. *
  15845. * @static
  15846. * @memberOf _
  15847. * @since 3.0.0
  15848. * @category Util
  15849. * @param {Object} source The object of property values to match.
  15850. * @returns {Function} Returns the new spec function.
  15851. * @example
  15852. *
  15853. * var objects = [
  15854. * { 'a': 1, 'b': 2, 'c': 3 },
  15855. * { 'a': 4, 'b': 5, 'c': 6 }
  15856. * ];
  15857. *
  15858. * _.filter(objects, _.matches({ 'a': 4, 'c': 6 }));
  15859. * // => [{ 'a': 4, 'b': 5, 'c': 6 }]
  15860. */
  15861. function matches(source) {
  15862. return baseMatches(baseClone(source, CLONE_DEEP_FLAG));
  15863. }
  15864. /**
  15865. * Creates a function that performs a partial deep comparison between the
  15866. * value at `path` of a given object to `srcValue`, returning `true` if the
  15867. * object value is equivalent, else `false`.
  15868. *
  15869. * **Note:** Partial comparisons will match empty array and empty object
  15870. * `srcValue` values against any array or object value, respectively. See
  15871. * `_.isEqual` for a list of supported value comparisons.
  15872. *
  15873. * @static
  15874. * @memberOf _
  15875. * @since 3.2.0
  15876. * @category Util
  15877. * @param {Array|string} path The path of the property to get.
  15878. * @param {*} srcValue The value to match.
  15879. * @returns {Function} Returns the new spec function.
  15880. * @example
  15881. *
  15882. * var objects = [
  15883. * { 'a': 1, 'b': 2, 'c': 3 },
  15884. * { 'a': 4, 'b': 5, 'c': 6 }
  15885. * ];
  15886. *
  15887. * _.find(objects, _.matchesProperty('a', 4));
  15888. * // => { 'a': 4, 'b': 5, 'c': 6 }
  15889. */
  15890. function matchesProperty(path, srcValue) {
  15891. return baseMatchesProperty(path, baseClone(srcValue, CLONE_DEEP_FLAG));
  15892. }
  15893. /**
  15894. * Creates a function that invokes the method at `path` of a given object.
  15895. * Any additional arguments are provided to the invoked method.
  15896. *
  15897. * @static
  15898. * @memberOf _
  15899. * @since 3.7.0
  15900. * @category Util
  15901. * @param {Array|string} path The path of the method to invoke.
  15902. * @param {...*} [args] The arguments to invoke the method with.
  15903. * @returns {Function} Returns the new invoker function.
  15904. * @example
  15905. *
  15906. * var objects = [
  15907. * { 'a': { 'b': _.constant(2) } },
  15908. * { 'a': { 'b': _.constant(1) } }
  15909. * ];
  15910. *
  15911. * _.map(objects, _.method('a.b'));
  15912. * // => [2, 1]
  15913. *
  15914. * _.map(objects, _.method(['a', 'b']));
  15915. * // => [2, 1]
  15916. */
  15917. var method = baseRest(function(path, args) {
  15918. return function(object) {
  15919. return baseInvoke(object, path, args);
  15920. };
  15921. });
  15922. /**
  15923. * The opposite of `_.method`; this method creates a function that invokes
  15924. * the method at a given path of `object`. Any additional arguments are
  15925. * provided to the invoked method.
  15926. *
  15927. * @static
  15928. * @memberOf _
  15929. * @since 3.7.0
  15930. * @category Util
  15931. * @param {Object} object The object to query.
  15932. * @param {...*} [args] The arguments to invoke the method with.
  15933. * @returns {Function} Returns the new invoker function.
  15934. * @example
  15935. *
  15936. * var array = _.times(3, _.constant),
  15937. * object = { 'a': array, 'b': array, 'c': array };
  15938. *
  15939. * _.map(['a[2]', 'c[0]'], _.methodOf(object));
  15940. * // => [2, 0]
  15941. *
  15942. * _.map([['a', '2'], ['c', '0']], _.methodOf(object));
  15943. * // => [2, 0]
  15944. */
  15945. var methodOf = baseRest(function(object, args) {
  15946. return function(path) {
  15947. return baseInvoke(object, path, args);
  15948. };
  15949. });
  15950. /**
  15951. * Adds all own enumerable string keyed function properties of a source
  15952. * object to the destination object. If `object` is a function, then methods
  15953. * are added to its prototype as well.
  15954. *
  15955. * **Note:** Use `_.runInContext` to create a pristine `lodash` function to
  15956. * avoid conflicts caused by modifying the original.
  15957. *
  15958. * @static
  15959. * @since 0.1.0
  15960. * @memberOf _
  15961. * @category Util
  15962. * @param {Function|Object} [object=lodash] The destination object.
  15963. * @param {Object} source The object of functions to add.
  15964. * @param {Object} [options={}] The options object.
  15965. * @param {boolean} [options.chain=true] Specify whether mixins are chainable.
  15966. * @returns {Function|Object} Returns `object`.
  15967. * @example
  15968. *
  15969. * function vowels(string) {
  15970. * return _.filter(string, function(v) {
  15971. * return /[aeiou]/i.test(v);
  15972. * });
  15973. * }
  15974. *
  15975. * _.mixin({ 'vowels': vowels });
  15976. * _.vowels('fred');
  15977. * // => ['e']
  15978. *
  15979. * _('fred').vowels().value();
  15980. * // => ['e']
  15981. *
  15982. * _.mixin({ 'vowels': vowels }, { 'chain': false });
  15983. * _('fred').vowels();
  15984. * // => ['e']
  15985. */
  15986. function mixin(object, source, options) {
  15987. var props = keys(source),
  15988. methodNames = baseFunctions(source, props);
  15989. if (options == null &&
  15990. !(isObject(source) && (methodNames.length || !props.length))) {
  15991. options = source;
  15992. source = object;
  15993. object = this;
  15994. methodNames = baseFunctions(source, keys(source));
  15995. }
  15996. var chain = !(isObject(options) && 'chain' in options) || !!options.chain,
  15997. isFunc = isFunction(object);
  15998. arrayEach(methodNames, function(methodName) {
  15999. var func = source[methodName];
  16000. object[methodName] = func;
  16001. if (isFunc) {
  16002. object.prototype[methodName] = function() {
  16003. var chainAll = this.__chain__;
  16004. if (chain || chainAll) {
  16005. var result = object(this.__wrapped__),
  16006. actions = result.__actions__ = copyArray(this.__actions__);
  16007. actions.push({ 'func': func, 'args': arguments, 'thisArg': object });
  16008. result.__chain__ = chainAll;
  16009. return result;
  16010. }
  16011. return func.apply(object, arrayPush([this.value()], arguments));
  16012. };
  16013. }
  16014. });
  16015. return object;
  16016. }
  16017. /**
  16018. * Reverts the `_` variable to its previous value and returns a reference to
  16019. * the `lodash` function.
  16020. *
  16021. * @static
  16022. * @since 0.1.0
  16023. * @memberOf _
  16024. * @category Util
  16025. * @returns {Function} Returns the `lodash` function.
  16026. * @example
  16027. *
  16028. * var lodash = _.noConflict();
  16029. */
  16030. function noConflict() {
  16031. if (root._ === this) {
  16032. root._ = oldDash;
  16033. }
  16034. return this;
  16035. }
  16036. /**
  16037. * This method returns `undefined`.
  16038. *
  16039. * @static
  16040. * @memberOf _
  16041. * @since 2.3.0
  16042. * @category Util
  16043. * @example
  16044. *
  16045. * _.times(2, _.noop);
  16046. * // => [undefined, undefined]
  16047. */
  16048. function noop() {
  16049. // No operation performed.
  16050. }
  16051. /**
  16052. * Creates a function that gets the argument at index `n`. If `n` is negative,
  16053. * the nth argument from the end is returned.
  16054. *
  16055. * @static
  16056. * @memberOf _
  16057. * @since 4.0.0
  16058. * @category Util
  16059. * @param {number} [n=0] The index of the argument to return.
  16060. * @returns {Function} Returns the new pass-thru function.
  16061. * @example
  16062. *
  16063. * var func = _.nthArg(1);
  16064. * func('a', 'b', 'c', 'd');
  16065. * // => 'b'
  16066. *
  16067. * var func = _.nthArg(-2);
  16068. * func('a', 'b', 'c', 'd');
  16069. * // => 'c'
  16070. */
  16071. function nthArg(n) {
  16072. n = toInteger(n);
  16073. return baseRest(function(args) {
  16074. return baseNth(args, n);
  16075. });
  16076. }
  16077. /**
  16078. * Creates a function that invokes `iteratees` with the arguments it receives
  16079. * and returns their results.
  16080. *
  16081. * @static
  16082. * @memberOf _
  16083. * @since 4.0.0
  16084. * @category Util
  16085. * @param {...(Function|Function[])} [iteratees=[_.identity]]
  16086. * The iteratees to invoke.
  16087. * @returns {Function} Returns the new function.
  16088. * @example
  16089. *
  16090. * var func = _.over([Math.max, Math.min]);
  16091. *
  16092. * func(1, 2, 3, 4);
  16093. * // => [4, 1]
  16094. */
  16095. var over = createOver(arrayMap);
  16096. /**
  16097. * Creates a function that checks if **all** of the `predicates` return
  16098. * truthy when invoked with the arguments it receives.
  16099. *
  16100. * @static
  16101. * @memberOf _
  16102. * @since 4.0.0
  16103. * @category Util
  16104. * @param {...(Function|Function[])} [predicates=[_.identity]]
  16105. * The predicates to check.
  16106. * @returns {Function} Returns the new function.
  16107. * @example
  16108. *
  16109. * var func = _.overEvery([Boolean, isFinite]);
  16110. *
  16111. * func('1');
  16112. * // => true
  16113. *
  16114. * func(null);
  16115. * // => false
  16116. *
  16117. * func(NaN);
  16118. * // => false
  16119. */
  16120. var overEvery = createOver(arrayEvery);
  16121. /**
  16122. * Creates a function that checks if **any** of the `predicates` return
  16123. * truthy when invoked with the arguments it receives.
  16124. *
  16125. * @static
  16126. * @memberOf _
  16127. * @since 4.0.0
  16128. * @category Util
  16129. * @param {...(Function|Function[])} [predicates=[_.identity]]
  16130. * The predicates to check.
  16131. * @returns {Function} Returns the new function.
  16132. * @example
  16133. *
  16134. * var func = _.overSome([Boolean, isFinite]);
  16135. *
  16136. * func('1');
  16137. * // => true
  16138. *
  16139. * func(null);
  16140. * // => true
  16141. *
  16142. * func(NaN);
  16143. * // => false
  16144. */
  16145. var overSome = createOver(arraySome);
  16146. /**
  16147. * Creates a function that returns the value at `path` of a given object.
  16148. *
  16149. * @static
  16150. * @memberOf _
  16151. * @since 2.4.0
  16152. * @category Util
  16153. * @param {Array|string} path The path of the property to get.
  16154. * @returns {Function} Returns the new accessor function.
  16155. * @example
  16156. *
  16157. * var objects = [
  16158. * { 'a': { 'b': 2 } },
  16159. * { 'a': { 'b': 1 } }
  16160. * ];
  16161. *
  16162. * _.map(objects, _.property('a.b'));
  16163. * // => [2, 1]
  16164. *
  16165. * _.map(_.sortBy(objects, _.property(['a', 'b'])), 'a.b');
  16166. * // => [1, 2]
  16167. */
  16168. function property(path) {
  16169. return isKey(path) ? baseProperty(toKey(path)) : basePropertyDeep(path);
  16170. }
  16171. /**
  16172. * The opposite of `_.property`; this method creates a function that returns
  16173. * the value at a given path of `object`.
  16174. *
  16175. * @static
  16176. * @memberOf _
  16177. * @since 3.0.0
  16178. * @category Util
  16179. * @param {Object} object The object to query.
  16180. * @returns {Function} Returns the new accessor function.
  16181. * @example
  16182. *
  16183. * var array = [0, 1, 2],
  16184. * object = { 'a': array, 'b': array, 'c': array };
  16185. *
  16186. * _.map(['a[2]', 'c[0]'], _.propertyOf(object));
  16187. * // => [2, 0]
  16188. *
  16189. * _.map([['a', '2'], ['c', '0']], _.propertyOf(object));
  16190. * // => [2, 0]
  16191. */
  16192. function propertyOf(object) {
  16193. return function(path) {
  16194. return object == null ? undefined : baseGet(object, path);
  16195. };
  16196. }
  16197. /**
  16198. * Creates an array of numbers (positive and/or negative) progressing from
  16199. * `start` up to, but not including, `end`. A step of `-1` is used if a negative
  16200. * `start` is specified without an `end` or `step`. If `end` is not specified,
  16201. * it's set to `start` with `start` then set to `0`.
  16202. *
  16203. * **Note:** JavaScript follows the IEEE-754 standard for resolving
  16204. * floating-point values which can produce unexpected results.
  16205. *
  16206. * @static
  16207. * @since 0.1.0
  16208. * @memberOf _
  16209. * @category Util
  16210. * @param {number} [start=0] The start of the range.
  16211. * @param {number} end The end of the range.
  16212. * @param {number} [step=1] The value to increment or decrement by.
  16213. * @returns {Array} Returns the range of numbers.
  16214. * @see _.inRange, _.rangeRight
  16215. * @example
  16216. *
  16217. * _.range(4);
  16218. * // => [0, 1, 2, 3]
  16219. *
  16220. * _.range(-4);
  16221. * // => [0, -1, -2, -3]
  16222. *
  16223. * _.range(1, 5);
  16224. * // => [1, 2, 3, 4]
  16225. *
  16226. * _.range(0, 20, 5);
  16227. * // => [0, 5, 10, 15]
  16228. *
  16229. * _.range(0, -4, -1);
  16230. * // => [0, -1, -2, -3]
  16231. *
  16232. * _.range(1, 4, 0);
  16233. * // => [1, 1, 1]
  16234. *
  16235. * _.range(0);
  16236. * // => []
  16237. */
  16238. var range = createRange();
  16239. /**
  16240. * This method is like `_.range` except that it populates values in
  16241. * descending order.
  16242. *
  16243. * @static
  16244. * @memberOf _
  16245. * @since 4.0.0
  16246. * @category Util
  16247. * @param {number} [start=0] The start of the range.
  16248. * @param {number} end The end of the range.
  16249. * @param {number} [step=1] The value to increment or decrement by.
  16250. * @returns {Array} Returns the range of numbers.
  16251. * @see _.inRange, _.range
  16252. * @example
  16253. *
  16254. * _.rangeRight(4);
  16255. * // => [3, 2, 1, 0]
  16256. *
  16257. * _.rangeRight(-4);
  16258. * // => [-3, -2, -1, 0]
  16259. *
  16260. * _.rangeRight(1, 5);
  16261. * // => [4, 3, 2, 1]
  16262. *
  16263. * _.rangeRight(0, 20, 5);
  16264. * // => [15, 10, 5, 0]
  16265. *
  16266. * _.rangeRight(0, -4, -1);
  16267. * // => [-3, -2, -1, 0]
  16268. *
  16269. * _.rangeRight(1, 4, 0);
  16270. * // => [1, 1, 1]
  16271. *
  16272. * _.rangeRight(0);
  16273. * // => []
  16274. */
  16275. var rangeRight = createRange(true);
  16276. /**
  16277. * This method returns a new empty array.
  16278. *
  16279. * @static
  16280. * @memberOf _
  16281. * @since 4.13.0
  16282. * @category Util
  16283. * @returns {Array} Returns the new empty array.
  16284. * @example
  16285. *
  16286. * var arrays = _.times(2, _.stubArray);
  16287. *
  16288. * console.log(arrays);
  16289. * // => [[], []]
  16290. *
  16291. * console.log(arrays[0] === arrays[1]);
  16292. * // => false
  16293. */
  16294. function stubArray() {
  16295. return [];
  16296. }
  16297. /**
  16298. * This method returns `false`.
  16299. *
  16300. * @static
  16301. * @memberOf _
  16302. * @since 4.13.0
  16303. * @category Util
  16304. * @returns {boolean} Returns `false`.
  16305. * @example
  16306. *
  16307. * _.times(2, _.stubFalse);
  16308. * // => [false, false]
  16309. */
  16310. function stubFalse() {
  16311. return false;
  16312. }
  16313. /**
  16314. * This method returns a new empty object.
  16315. *
  16316. * @static
  16317. * @memberOf _
  16318. * @since 4.13.0
  16319. * @category Util
  16320. * @returns {Object} Returns the new empty object.
  16321. * @example
  16322. *
  16323. * var objects = _.times(2, _.stubObject);
  16324. *
  16325. * console.log(objects);
  16326. * // => [{}, {}]
  16327. *
  16328. * console.log(objects[0] === objects[1]);
  16329. * // => false
  16330. */
  16331. function stubObject() {
  16332. return {};
  16333. }
  16334. /**
  16335. * This method returns an empty string.
  16336. *
  16337. * @static
  16338. * @memberOf _
  16339. * @since 4.13.0
  16340. * @category Util
  16341. * @returns {string} Returns the empty string.
  16342. * @example
  16343. *
  16344. * _.times(2, _.stubString);
  16345. * // => ['', '']
  16346. */
  16347. function stubString() {
  16348. return '';
  16349. }
  16350. /**
  16351. * This method returns `true`.
  16352. *
  16353. * @static
  16354. * @memberOf _
  16355. * @since 4.13.0
  16356. * @category Util
  16357. * @returns {boolean} Returns `true`.
  16358. * @example
  16359. *
  16360. * _.times(2, _.stubTrue);
  16361. * // => [true, true]
  16362. */
  16363. function stubTrue() {
  16364. return true;
  16365. }
  16366. /**
  16367. * Invokes the iteratee `n` times, returning an array of the results of
  16368. * each invocation. The iteratee is invoked with one argument; (index).
  16369. *
  16370. * @static
  16371. * @since 0.1.0
  16372. * @memberOf _
  16373. * @category Util
  16374. * @param {number} n The number of times to invoke `iteratee`.
  16375. * @param {Function} [iteratee=_.identity] The function invoked per iteration.
  16376. * @returns {Array} Returns the array of results.
  16377. * @example
  16378. *
  16379. * _.times(3, String);
  16380. * // => ['0', '1', '2']
  16381. *
  16382. * _.times(4, _.constant(0));
  16383. * // => [0, 0, 0, 0]
  16384. */
  16385. function times(n, iteratee) {
  16386. n = toInteger(n);
  16387. if (n < 1 || n > MAX_SAFE_INTEGER) {
  16388. return [];
  16389. }
  16390. var index = MAX_ARRAY_LENGTH,
  16391. length = nativeMin(n, MAX_ARRAY_LENGTH);
  16392. iteratee = getIteratee(iteratee);
  16393. n -= MAX_ARRAY_LENGTH;
  16394. var result = baseTimes(length, iteratee);
  16395. while (++index < n) {
  16396. iteratee(index);
  16397. }
  16398. return result;
  16399. }
  16400. /**
  16401. * Converts `value` to a property path array.
  16402. *
  16403. * @static
  16404. * @memberOf _
  16405. * @since 4.0.0
  16406. * @category Util
  16407. * @param {*} value The value to convert.
  16408. * @returns {Array} Returns the new property path array.
  16409. * @example
  16410. *
  16411. * _.toPath('a.b.c');
  16412. * // => ['a', 'b', 'c']
  16413. *
  16414. * _.toPath('a[0].b.c');
  16415. * // => ['a', '0', 'b', 'c']
  16416. */
  16417. function toPath(value) {
  16418. if (isArray(value)) {
  16419. return arrayMap(value, toKey);
  16420. }
  16421. return isSymbol(value) ? [value] : copyArray(stringToPath(toString(value)));
  16422. }
  16423. /**
  16424. * Generates a unique ID. If `prefix` is given, the ID is appended to it.
  16425. *
  16426. * @static
  16427. * @since 0.1.0
  16428. * @memberOf _
  16429. * @category Util
  16430. * @param {string} [prefix=''] The value to prefix the ID with.
  16431. * @returns {string} Returns the unique ID.
  16432. * @example
  16433. *
  16434. * _.uniqueId('contact_');
  16435. * // => 'contact_104'
  16436. *
  16437. * _.uniqueId();
  16438. * // => '105'
  16439. */
  16440. function uniqueId(prefix) {
  16441. var id = ++idCounter;
  16442. return toString(prefix) + id;
  16443. }
  16444. /*------------------------------------------------------------------------*/
  16445. /**
  16446. * Adds two numbers.
  16447. *
  16448. * @static
  16449. * @memberOf _
  16450. * @since 3.4.0
  16451. * @category Math
  16452. * @param {number} augend The first number in an addition.
  16453. * @param {number} addend The second number in an addition.
  16454. * @returns {number} Returns the total.
  16455. * @example
  16456. *
  16457. * _.add(6, 4);
  16458. * // => 10
  16459. */
  16460. var add = createMathOperation(function(augend, addend) {
  16461. return augend + addend;
  16462. }, 0);
  16463. /**
  16464. * Computes `number` rounded up to `precision`.
  16465. *
  16466. * @static
  16467. * @memberOf _
  16468. * @since 3.10.0
  16469. * @category Math
  16470. * @param {number} number The number to round up.
  16471. * @param {number} [precision=0] The precision to round up to.
  16472. * @returns {number} Returns the rounded up number.
  16473. * @example
  16474. *
  16475. * _.ceil(4.006);
  16476. * // => 5
  16477. *
  16478. * _.ceil(6.004, 2);
  16479. * // => 6.01
  16480. *
  16481. * _.ceil(6040, -2);
  16482. * // => 6100
  16483. */
  16484. var ceil = createRound('ceil');
  16485. /**
  16486. * Divide two numbers.
  16487. *
  16488. * @static
  16489. * @memberOf _
  16490. * @since 4.7.0
  16491. * @category Math
  16492. * @param {number} dividend The first number in a division.
  16493. * @param {number} divisor The second number in a division.
  16494. * @returns {number} Returns the quotient.
  16495. * @example
  16496. *
  16497. * _.divide(6, 4);
  16498. * // => 1.5
  16499. */
  16500. var divide = createMathOperation(function(dividend, divisor) {
  16501. return dividend / divisor;
  16502. }, 1);
  16503. /**
  16504. * Computes `number` rounded down to `precision`.
  16505. *
  16506. * @static
  16507. * @memberOf _
  16508. * @since 3.10.0
  16509. * @category Math
  16510. * @param {number} number The number to round down.
  16511. * @param {number} [precision=0] The precision to round down to.
  16512. * @returns {number} Returns the rounded down number.
  16513. * @example
  16514. *
  16515. * _.floor(4.006);
  16516. * // => 4
  16517. *
  16518. * _.floor(0.046, 2);
  16519. * // => 0.04
  16520. *
  16521. * _.floor(4060, -2);
  16522. * // => 4000
  16523. */
  16524. var floor = createRound('floor');
  16525. /**
  16526. * Computes the maximum value of `array`. If `array` is empty or falsey,
  16527. * `undefined` is returned.
  16528. *
  16529. * @static
  16530. * @since 0.1.0
  16531. * @memberOf _
  16532. * @category Math
  16533. * @param {Array} array The array to iterate over.
  16534. * @returns {*} Returns the maximum value.
  16535. * @example
  16536. *
  16537. * _.max([4, 2, 8, 6]);
  16538. * // => 8
  16539. *
  16540. * _.max([]);
  16541. * // => undefined
  16542. */
  16543. function max(array) {
  16544. return (array && array.length)
  16545. ? baseExtremum(array, identity, baseGt)
  16546. : undefined;
  16547. }
  16548. /**
  16549. * This method is like `_.max` except that it accepts `iteratee` which is
  16550. * invoked for each element in `array` to generate the criterion by which
  16551. * the value is ranked. The iteratee is invoked with one argument: (value).
  16552. *
  16553. * @static
  16554. * @memberOf _
  16555. * @since 4.0.0
  16556. * @category Math
  16557. * @param {Array} array The array to iterate over.
  16558. * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
  16559. * @returns {*} Returns the maximum value.
  16560. * @example
  16561. *
  16562. * var objects = [{ 'n': 1 }, { 'n': 2 }];
  16563. *
  16564. * _.maxBy(objects, function(o) { return o.n; });
  16565. * // => { 'n': 2 }
  16566. *
  16567. * // The `_.property` iteratee shorthand.
  16568. * _.maxBy(objects, 'n');
  16569. * // => { 'n': 2 }
  16570. */
  16571. function maxBy(array, iteratee) {
  16572. return (array && array.length)
  16573. ? baseExtremum(array, getIteratee(iteratee, 2), baseGt)
  16574. : undefined;
  16575. }
  16576. /**
  16577. * Computes the mean of the values in `array`.
  16578. *
  16579. * @static
  16580. * @memberOf _
  16581. * @since 4.0.0
  16582. * @category Math
  16583. * @param {Array} array The array to iterate over.
  16584. * @returns {number} Returns the mean.
  16585. * @example
  16586. *
  16587. * _.mean([4, 2, 8, 6]);
  16588. * // => 5
  16589. */
  16590. function mean(array) {
  16591. return baseMean(array, identity);
  16592. }
  16593. /**
  16594. * This method is like `_.mean` except that it accepts `iteratee` which is
  16595. * invoked for each element in `array` to generate the value to be averaged.
  16596. * The iteratee is invoked with one argument: (value).
  16597. *
  16598. * @static
  16599. * @memberOf _
  16600. * @since 4.7.0
  16601. * @category Math
  16602. * @param {Array} array The array to iterate over.
  16603. * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
  16604. * @returns {number} Returns the mean.
  16605. * @example
  16606. *
  16607. * var objects = [{ 'n': 4 }, { 'n': 2 }, { 'n': 8 }, { 'n': 6 }];
  16608. *
  16609. * _.meanBy(objects, function(o) { return o.n; });
  16610. * // => 5
  16611. *
  16612. * // The `_.property` iteratee shorthand.
  16613. * _.meanBy(objects, 'n');
  16614. * // => 5
  16615. */
  16616. function meanBy(array, iteratee) {
  16617. return baseMean(array, getIteratee(iteratee, 2));
  16618. }
  16619. /**
  16620. * Computes the minimum value of `array`. If `array` is empty or falsey,
  16621. * `undefined` is returned.
  16622. *
  16623. * @static
  16624. * @since 0.1.0
  16625. * @memberOf _
  16626. * @category Math
  16627. * @param {Array} array The array to iterate over.
  16628. * @returns {*} Returns the minimum value.
  16629. * @example
  16630. *
  16631. * _.min([4, 2, 8, 6]);
  16632. * // => 2
  16633. *
  16634. * _.min([]);
  16635. * // => undefined
  16636. */
  16637. function min(array) {
  16638. return (array && array.length)
  16639. ? baseExtremum(array, identity, baseLt)
  16640. : undefined;
  16641. }
  16642. /**
  16643. * This method is like `_.min` except that it accepts `iteratee` which is
  16644. * invoked for each element in `array` to generate the criterion by which
  16645. * the value is ranked. The iteratee is invoked with one argument: (value).
  16646. *
  16647. * @static
  16648. * @memberOf _
  16649. * @since 4.0.0
  16650. * @category Math
  16651. * @param {Array} array The array to iterate over.
  16652. * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
  16653. * @returns {*} Returns the minimum value.
  16654. * @example
  16655. *
  16656. * var objects = [{ 'n': 1 }, { 'n': 2 }];
  16657. *
  16658. * _.minBy(objects, function(o) { return o.n; });
  16659. * // => { 'n': 1 }
  16660. *
  16661. * // The `_.property` iteratee shorthand.
  16662. * _.minBy(objects, 'n');
  16663. * // => { 'n': 1 }
  16664. */
  16665. function minBy(array, iteratee) {
  16666. return (array && array.length)
  16667. ? baseExtremum(array, getIteratee(iteratee, 2), baseLt)
  16668. : undefined;
  16669. }
  16670. /**
  16671. * Multiply two numbers.
  16672. *
  16673. * @static
  16674. * @memberOf _
  16675. * @since 4.7.0
  16676. * @category Math
  16677. * @param {number} multiplier The first number in a multiplication.
  16678. * @param {number} multiplicand The second number in a multiplication.
  16679. * @returns {number} Returns the product.
  16680. * @example
  16681. *
  16682. * _.multiply(6, 4);
  16683. * // => 24
  16684. */
  16685. var multiply = createMathOperation(function(multiplier, multiplicand) {
  16686. return multiplier * multiplicand;
  16687. }, 1);
  16688. /**
  16689. * Computes `number` rounded to `precision`.
  16690. *
  16691. * @static
  16692. * @memberOf _
  16693. * @since 3.10.0
  16694. * @category Math
  16695. * @param {number} number The number to round.
  16696. * @param {number} [precision=0] The precision to round to.
  16697. * @returns {number} Returns the rounded number.
  16698. * @example
  16699. *
  16700. * _.round(4.006);
  16701. * // => 4
  16702. *
  16703. * _.round(4.006, 2);
  16704. * // => 4.01
  16705. *
  16706. * _.round(4060, -2);
  16707. * // => 4100
  16708. */
  16709. var round = createRound('round');
  16710. /**
  16711. * Subtract two numbers.
  16712. *
  16713. * @static
  16714. * @memberOf _
  16715. * @since 4.0.0
  16716. * @category Math
  16717. * @param {number} minuend The first number in a subtraction.
  16718. * @param {number} subtrahend The second number in a subtraction.
  16719. * @returns {number} Returns the difference.
  16720. * @example
  16721. *
  16722. * _.subtract(6, 4);
  16723. * // => 2
  16724. */
  16725. var subtract = createMathOperation(function(minuend, subtrahend) {
  16726. return minuend - subtrahend;
  16727. }, 0);
  16728. /**
  16729. * Computes the sum of the values in `array`.
  16730. *
  16731. * @static
  16732. * @memberOf _
  16733. * @since 3.4.0
  16734. * @category Math
  16735. * @param {Array} array The array to iterate over.
  16736. * @returns {number} Returns the sum.
  16737. * @example
  16738. *
  16739. * _.sum([4, 2, 8, 6]);
  16740. * // => 20
  16741. */
  16742. function sum(array) {
  16743. return (array && array.length)
  16744. ? baseSum(array, identity)
  16745. : 0;
  16746. }
  16747. /**
  16748. * This method is like `_.sum` except that it accepts `iteratee` which is
  16749. * invoked for each element in `array` to generate the value to be summed.
  16750. * The iteratee is invoked with one argument: (value).
  16751. *
  16752. * @static
  16753. * @memberOf _
  16754. * @since 4.0.0
  16755. * @category Math
  16756. * @param {Array} array The array to iterate over.
  16757. * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
  16758. * @returns {number} Returns the sum.
  16759. * @example
  16760. *
  16761. * var objects = [{ 'n': 4 }, { 'n': 2 }, { 'n': 8 }, { 'n': 6 }];
  16762. *
  16763. * _.sumBy(objects, function(o) { return o.n; });
  16764. * // => 20
  16765. *
  16766. * // The `_.property` iteratee shorthand.
  16767. * _.sumBy(objects, 'n');
  16768. * // => 20
  16769. */
  16770. function sumBy(array, iteratee) {
  16771. return (array && array.length)
  16772. ? baseSum(array, getIteratee(iteratee, 2))
  16773. : 0;
  16774. }
  16775. /*------------------------------------------------------------------------*/
  16776. // Add methods that return wrapped values in chain sequences.
  16777. lodash.after = after;
  16778. lodash.ary = ary;
  16779. lodash.assign = assign;
  16780. lodash.assignIn = assignIn;
  16781. lodash.assignInWith = assignInWith;
  16782. lodash.assignWith = assignWith;
  16783. lodash.at = at;
  16784. lodash.before = before;
  16785. lodash.bind = bind;
  16786. lodash.bindAll = bindAll;
  16787. lodash.bindKey = bindKey;
  16788. lodash.castArray = castArray;
  16789. lodash.chain = chain;
  16790. lodash.chunk = chunk;
  16791. lodash.compact = compact;
  16792. lodash.concat = concat;
  16793. lodash.cond = cond;
  16794. lodash.conforms = conforms;
  16795. lodash.constant = constant;
  16796. lodash.countBy = countBy;
  16797. lodash.create = create;
  16798. lodash.curry = curry;
  16799. lodash.curryRight = curryRight;
  16800. lodash.debounce = debounce;
  16801. lodash.defaults = defaults;
  16802. lodash.defaultsDeep = defaultsDeep;
  16803. lodash.defer = defer;
  16804. lodash.delay = delay;
  16805. lodash.difference = difference;
  16806. lodash.differenceBy = differenceBy;
  16807. lodash.differenceWith = differenceWith;
  16808. lodash.drop = drop;
  16809. lodash.dropRight = dropRight;
  16810. lodash.dropRightWhile = dropRightWhile;
  16811. lodash.dropWhile = dropWhile;
  16812. lodash.fill = fill;
  16813. lodash.filter = filter;
  16814. lodash.flatMap = flatMap;
  16815. lodash.flatMapDeep = flatMapDeep;
  16816. lodash.flatMapDepth = flatMapDepth;
  16817. lodash.flatten = flatten;
  16818. lodash.flattenDeep = flattenDeep;
  16819. lodash.flattenDepth = flattenDepth;
  16820. lodash.flip = flip;
  16821. lodash.flow = flow;
  16822. lodash.flowRight = flowRight;
  16823. lodash.fromPairs = fromPairs;
  16824. lodash.functions = functions;
  16825. lodash.functionsIn = functionsIn;
  16826. lodash.groupBy = groupBy;
  16827. lodash.initial = initial;
  16828. lodash.intersection = intersection;
  16829. lodash.intersectionBy = intersectionBy;
  16830. lodash.intersectionWith = intersectionWith;
  16831. lodash.invert = invert;
  16832. lodash.invertBy = invertBy;
  16833. lodash.invokeMap = invokeMap;
  16834. lodash.iteratee = iteratee;
  16835. lodash.keyBy = keyBy;
  16836. lodash.keys = keys;
  16837. lodash.keysIn = keysIn;
  16838. lodash.map = map;
  16839. lodash.mapKeys = mapKeys;
  16840. lodash.mapValues = mapValues;
  16841. lodash.matches = matches;
  16842. lodash.matchesProperty = matchesProperty;
  16843. lodash.memoize = memoize;
  16844. lodash.merge = merge;
  16845. lodash.mergeWith = mergeWith;
  16846. lodash.method = method;
  16847. lodash.methodOf = methodOf;
  16848. lodash.mixin = mixin;
  16849. lodash.negate = negate;
  16850. lodash.nthArg = nthArg;
  16851. lodash.omit = omit;
  16852. lodash.omitBy = omitBy;
  16853. lodash.once = once;
  16854. lodash.orderBy = orderBy;
  16855. lodash.over = over;
  16856. lodash.overArgs = overArgs;
  16857. lodash.overEvery = overEvery;
  16858. lodash.overSome = overSome;
  16859. lodash.partial = partial;
  16860. lodash.partialRight = partialRight;
  16861. lodash.partition = partition;
  16862. lodash.pick = pick;
  16863. lodash.pickBy = pickBy;
  16864. lodash.property = property;
  16865. lodash.propertyOf = propertyOf;
  16866. lodash.pull = pull;
  16867. lodash.pullAll = pullAll;
  16868. lodash.pullAllBy = pullAllBy;
  16869. lodash.pullAllWith = pullAllWith;
  16870. lodash.pullAt = pullAt;
  16871. lodash.range = range;
  16872. lodash.rangeRight = rangeRight;
  16873. lodash.rearg = rearg;
  16874. lodash.reject = reject;
  16875. lodash.remove = remove;
  16876. lodash.rest = rest;
  16877. lodash.reverse = reverse;
  16878. lodash.sampleSize = sampleSize;
  16879. lodash.set = set;
  16880. lodash.setWith = setWith;
  16881. lodash.shuffle = shuffle;
  16882. lodash.slice = slice;
  16883. lodash.sortBy = sortBy;
  16884. lodash.sortedUniq = sortedUniq;
  16885. lodash.sortedUniqBy = sortedUniqBy;
  16886. lodash.split = split;
  16887. lodash.spread = spread;
  16888. lodash.tail = tail;
  16889. lodash.take = take;
  16890. lodash.takeRight = takeRight;
  16891. lodash.takeRightWhile = takeRightWhile;
  16892. lodash.takeWhile = takeWhile;
  16893. lodash.tap = tap;
  16894. lodash.throttle = throttle;
  16895. lodash.thru = thru;
  16896. lodash.toArray = toArray;
  16897. lodash.toPairs = toPairs;
  16898. lodash.toPairsIn = toPairsIn;
  16899. lodash.toPath = toPath;
  16900. lodash.toPlainObject = toPlainObject;
  16901. lodash.transform = transform;
  16902. lodash.unary = unary;
  16903. lodash.union = union;
  16904. lodash.unionBy = unionBy;
  16905. lodash.unionWith = unionWith;
  16906. lodash.uniq = uniq;
  16907. lodash.uniqBy = uniqBy;
  16908. lodash.uniqWith = uniqWith;
  16909. lodash.unset = unset;
  16910. lodash.unzip = unzip;
  16911. lodash.unzipWith = unzipWith;
  16912. lodash.update = update;
  16913. lodash.updateWith = updateWith;
  16914. lodash.values = values;
  16915. lodash.valuesIn = valuesIn;
  16916. lodash.without = without;
  16917. lodash.words = words;
  16918. lodash.wrap = wrap;
  16919. lodash.xor = xor;
  16920. lodash.xorBy = xorBy;
  16921. lodash.xorWith = xorWith;
  16922. lodash.zip = zip;
  16923. lodash.zipObject = zipObject;
  16924. lodash.zipObjectDeep = zipObjectDeep;
  16925. lodash.zipWith = zipWith;
  16926. // Add aliases.
  16927. lodash.entries = toPairs;
  16928. lodash.entriesIn = toPairsIn;
  16929. lodash.extend = assignIn;
  16930. lodash.extendWith = assignInWith;
  16931. // Add methods to `lodash.prototype`.
  16932. mixin(lodash, lodash);
  16933. /*------------------------------------------------------------------------*/
  16934. // Add methods that return unwrapped values in chain sequences.
  16935. lodash.add = add;
  16936. lodash.attempt = attempt;
  16937. lodash.camelCase = camelCase;
  16938. lodash.capitalize = capitalize;
  16939. lodash.ceil = ceil;
  16940. lodash.clamp = clamp;
  16941. lodash.clone = clone;
  16942. lodash.cloneDeep = cloneDeep;
  16943. lodash.cloneDeepWith = cloneDeepWith;
  16944. lodash.cloneWith = cloneWith;
  16945. lodash.conformsTo = conformsTo;
  16946. lodash.deburr = deburr;
  16947. lodash.defaultTo = defaultTo;
  16948. lodash.divide = divide;
  16949. lodash.endsWith = endsWith;
  16950. lodash.eq = eq;
  16951. lodash.escape = escape;
  16952. lodash.escapeRegExp = escapeRegExp;
  16953. lodash.every = every;
  16954. lodash.find = find;
  16955. lodash.findIndex = findIndex;
  16956. lodash.findKey = findKey;
  16957. lodash.findLast = findLast;
  16958. lodash.findLastIndex = findLastIndex;
  16959. lodash.findLastKey = findLastKey;
  16960. lodash.floor = floor;
  16961. lodash.forEach = forEach;
  16962. lodash.forEachRight = forEachRight;
  16963. lodash.forIn = forIn;
  16964. lodash.forInRight = forInRight;
  16965. lodash.forOwn = forOwn;
  16966. lodash.forOwnRight = forOwnRight;
  16967. lodash.get = get;
  16968. lodash.gt = gt;
  16969. lodash.gte = gte;
  16970. lodash.has = has;
  16971. lodash.hasIn = hasIn;
  16972. lodash.head = head;
  16973. lodash.identity = identity;
  16974. lodash.includes = includes;
  16975. lodash.indexOf = indexOf;
  16976. lodash.inRange = inRange;
  16977. lodash.invoke = invoke;
  16978. lodash.isArguments = isArguments;
  16979. lodash.isArray = isArray;
  16980. lodash.isArrayBuffer = isArrayBuffer;
  16981. lodash.isArrayLike = isArrayLike;
  16982. lodash.isArrayLikeObject = isArrayLikeObject;
  16983. lodash.isBoolean = isBoolean;
  16984. lodash.isBuffer = isBuffer;
  16985. lodash.isDate = isDate;
  16986. lodash.isElement = isElement;
  16987. lodash.isEmpty = isEmpty;
  16988. lodash.isEqual = isEqual;
  16989. lodash.isEqualWith = isEqualWith;
  16990. lodash.isError = isError;
  16991. lodash.isFinite = isFinite;
  16992. lodash.isFunction = isFunction;
  16993. lodash.isInteger = isInteger;
  16994. lodash.isLength = isLength;
  16995. lodash.isMap = isMap;
  16996. lodash.isMatch = isMatch;
  16997. lodash.isMatchWith = isMatchWith;
  16998. lodash.isNaN = isNaN;
  16999. lodash.isNative = isNative;
  17000. lodash.isNil = isNil;
  17001. lodash.isNull = isNull;
  17002. lodash.isNumber = isNumber;
  17003. lodash.isObject = isObject;
  17004. lodash.isObjectLike = isObjectLike;
  17005. lodash.isPlainObject = isPlainObject;
  17006. lodash.isRegExp = isRegExp;
  17007. lodash.isSafeInteger = isSafeInteger;
  17008. lodash.isSet = isSet;
  17009. lodash.isString = isString;
  17010. lodash.isSymbol = isSymbol;
  17011. lodash.isTypedArray = isTypedArray;
  17012. lodash.isUndefined = isUndefined;
  17013. lodash.isWeakMap = isWeakMap;
  17014. lodash.isWeakSet = isWeakSet;
  17015. lodash.join = join;
  17016. lodash.kebabCase = kebabCase;
  17017. lodash.last = last;
  17018. lodash.lastIndexOf = lastIndexOf;
  17019. lodash.lowerCase = lowerCase;
  17020. lodash.lowerFirst = lowerFirst;
  17021. lodash.lt = lt;
  17022. lodash.lte = lte;
  17023. lodash.max = max;
  17024. lodash.maxBy = maxBy;
  17025. lodash.mean = mean;
  17026. lodash.meanBy = meanBy;
  17027. lodash.min = min;
  17028. lodash.minBy = minBy;
  17029. lodash.stubArray = stubArray;
  17030. lodash.stubFalse = stubFalse;
  17031. lodash.stubObject = stubObject;
  17032. lodash.stubString = stubString;
  17033. lodash.stubTrue = stubTrue;
  17034. lodash.multiply = multiply;
  17035. lodash.nth = nth;
  17036. lodash.noConflict = noConflict;
  17037. lodash.noop = noop;
  17038. lodash.now = now;
  17039. lodash.pad = pad;
  17040. lodash.padEnd = padEnd;
  17041. lodash.padStart = padStart;
  17042. lodash.parseInt = parseInt;
  17043. lodash.random = random;
  17044. lodash.reduce = reduce;
  17045. lodash.reduceRight = reduceRight;
  17046. lodash.repeat = repeat;
  17047. lodash.replace = replace;
  17048. lodash.result = result;
  17049. lodash.round = round;
  17050. lodash.runInContext = runInContext;
  17051. lodash.sample = sample;
  17052. lodash.size = size;
  17053. lodash.snakeCase = snakeCase;
  17054. lodash.some = some;
  17055. lodash.sortedIndex = sortedIndex;
  17056. lodash.sortedIndexBy = sortedIndexBy;
  17057. lodash.sortedIndexOf = sortedIndexOf;
  17058. lodash.sortedLastIndex = sortedLastIndex;
  17059. lodash.sortedLastIndexBy = sortedLastIndexBy;
  17060. lodash.sortedLastIndexOf = sortedLastIndexOf;
  17061. lodash.startCase = startCase;
  17062. lodash.startsWith = startsWith;
  17063. lodash.subtract = subtract;
  17064. lodash.sum = sum;
  17065. lodash.sumBy = sumBy;
  17066. lodash.template = template;
  17067. lodash.times = times;
  17068. lodash.toFinite = toFinite;
  17069. lodash.toInteger = toInteger;
  17070. lodash.toLength = toLength;
  17071. lodash.toLower = toLower;
  17072. lodash.toNumber = toNumber;
  17073. lodash.toSafeInteger = toSafeInteger;
  17074. lodash.toString = toString;
  17075. lodash.toUpper = toUpper;
  17076. lodash.trim = trim;
  17077. lodash.trimEnd = trimEnd;
  17078. lodash.trimStart = trimStart;
  17079. lodash.truncate = truncate;
  17080. lodash.unescape = unescape;
  17081. lodash.uniqueId = uniqueId;
  17082. lodash.upperCase = upperCase;
  17083. lodash.upperFirst = upperFirst;
  17084. // Add aliases.
  17085. lodash.each = forEach;
  17086. lodash.eachRight = forEachRight;
  17087. lodash.first = head;
  17088. mixin(lodash, (function() {
  17089. var source = {};
  17090. baseForOwn(lodash, function(func, methodName) {
  17091. if (!hasOwnProperty.call(lodash.prototype, methodName)) {
  17092. source[methodName] = func;
  17093. }
  17094. });
  17095. return source;
  17096. }()), { 'chain': false });
  17097. /*------------------------------------------------------------------------*/
  17098. /**
  17099. * The semantic version number.
  17100. *
  17101. * @static
  17102. * @memberOf _
  17103. * @type {string}
  17104. */
  17105. lodash.VERSION = VERSION;
  17106. // Assign default placeholders.
  17107. arrayEach(['bind', 'bindKey', 'curry', 'curryRight', 'partial', 'partialRight'], function(methodName) {
  17108. lodash[methodName].placeholder = lodash;
  17109. });
  17110. // Add `LazyWrapper` methods for `_.drop` and `_.take` variants.
  17111. arrayEach(['drop', 'take'], function(methodName, index) {
  17112. LazyWrapper.prototype[methodName] = function(n) {
  17113. n = n === undefined ? 1 : nativeMax(toInteger(n), 0);
  17114. var result = (this.__filtered__ && !index)
  17115. ? new LazyWrapper(this)
  17116. : this.clone();
  17117. if (result.__filtered__) {
  17118. result.__takeCount__ = nativeMin(n, result.__takeCount__);
  17119. } else {
  17120. result.__views__.push({
  17121. 'size': nativeMin(n, MAX_ARRAY_LENGTH),
  17122. 'type': methodName + (result.__dir__ < 0 ? 'Right' : '')
  17123. });
  17124. }
  17125. return result;
  17126. };
  17127. LazyWrapper.prototype[methodName + 'Right'] = function(n) {
  17128. return this.reverse()[methodName](n).reverse();
  17129. };
  17130. });
  17131. // Add `LazyWrapper` methods that accept an `iteratee` value.
  17132. arrayEach(['filter', 'map', 'takeWhile'], function(methodName, index) {
  17133. var type = index + 1,
  17134. isFilter = type == LAZY_FILTER_FLAG || type == LAZY_WHILE_FLAG;
  17135. LazyWrapper.prototype[methodName] = function(iteratee) {
  17136. var result = this.clone();
  17137. result.__iteratees__.push({
  17138. 'iteratee': getIteratee(iteratee, 3),
  17139. 'type': type
  17140. });
  17141. result.__filtered__ = result.__filtered__ || isFilter;
  17142. return result;
  17143. };
  17144. });
  17145. // Add `LazyWrapper` methods for `_.head` and `_.last`.
  17146. arrayEach(['head', 'last'], function(methodName, index) {
  17147. var takeName = 'take' + (index ? 'Right' : '');
  17148. LazyWrapper.prototype[methodName] = function() {
  17149. return this[takeName](1).value()[0];
  17150. };
  17151. });
  17152. // Add `LazyWrapper` methods for `_.initial` and `_.tail`.
  17153. arrayEach(['initial', 'tail'], function(methodName, index) {
  17154. var dropName = 'drop' + (index ? '' : 'Right');
  17155. LazyWrapper.prototype[methodName] = function() {
  17156. return this.__filtered__ ? new LazyWrapper(this) : this[dropName](1);
  17157. };
  17158. });
  17159. LazyWrapper.prototype.compact = function() {
  17160. return this.filter(identity);
  17161. };
  17162. LazyWrapper.prototype.find = function(predicate) {
  17163. return this.filter(predicate).head();
  17164. };
  17165. LazyWrapper.prototype.findLast = function(predicate) {
  17166. return this.reverse().find(predicate);
  17167. };
  17168. LazyWrapper.prototype.invokeMap = baseRest(function(path, args) {
  17169. if (typeof path == 'function') {
  17170. return new LazyWrapper(this);
  17171. }
  17172. return this.map(function(value) {
  17173. return baseInvoke(value, path, args);
  17174. });
  17175. });
  17176. LazyWrapper.prototype.reject = function(predicate) {
  17177. return this.filter(negate(getIteratee(predicate)));
  17178. };
  17179. LazyWrapper.prototype.slice = function(start, end) {
  17180. start = toInteger(start);
  17181. var result = this;
  17182. if (result.__filtered__ && (start > 0 || end < 0)) {
  17183. return new LazyWrapper(result);
  17184. }
  17185. if (start < 0) {
  17186. result = result.takeRight(-start);
  17187. } else if (start) {
  17188. result = result.drop(start);
  17189. }
  17190. if (end !== undefined) {
  17191. end = toInteger(end);
  17192. result = end < 0 ? result.dropRight(-end) : result.take(end - start);
  17193. }
  17194. return result;
  17195. };
  17196. LazyWrapper.prototype.takeRightWhile = function(predicate) {
  17197. return this.reverse().takeWhile(predicate).reverse();
  17198. };
  17199. LazyWrapper.prototype.toArray = function() {
  17200. return this.take(MAX_ARRAY_LENGTH);
  17201. };
  17202. // Add `LazyWrapper` methods to `lodash.prototype`.
  17203. baseForOwn(LazyWrapper.prototype, function(func, methodName) {
  17204. var checkIteratee = /^(?:filter|find|map|reject)|While$/.test(methodName),
  17205. isTaker = /^(?:head|last)$/.test(methodName),
  17206. lodashFunc = lodash[isTaker ? ('take' + (methodName == 'last' ? 'Right' : '')) : methodName],
  17207. retUnwrapped = isTaker || /^find/.test(methodName);
  17208. if (!lodashFunc) {
  17209. return;
  17210. }
  17211. lodash.prototype[methodName] = function() {
  17212. var value = this.__wrapped__,
  17213. args = isTaker ? [1] : arguments,
  17214. isLazy = value instanceof LazyWrapper,
  17215. iteratee = args[0],
  17216. useLazy = isLazy || isArray(value);
  17217. var interceptor = function(value) {
  17218. var result = lodashFunc.apply(lodash, arrayPush([value], args));
  17219. return (isTaker && chainAll) ? result[0] : result;
  17220. };
  17221. if (useLazy && checkIteratee && typeof iteratee == 'function' && iteratee.length != 1) {
  17222. // Avoid lazy use if the iteratee has a "length" value other than `1`.
  17223. isLazy = useLazy = false;
  17224. }
  17225. var chainAll = this.__chain__,
  17226. isHybrid = !!this.__actions__.length,
  17227. isUnwrapped = retUnwrapped && !chainAll,
  17228. onlyLazy = isLazy && !isHybrid;
  17229. if (!retUnwrapped && useLazy) {
  17230. value = onlyLazy ? value : new LazyWrapper(this);
  17231. var result = func.apply(value, args);
  17232. result.__actions__.push({ 'func': thru, 'args': [interceptor], 'thisArg': undefined });
  17233. return new LodashWrapper(result, chainAll);
  17234. }
  17235. if (isUnwrapped && onlyLazy) {
  17236. return func.apply(this, args);
  17237. }
  17238. result = this.thru(interceptor);
  17239. return isUnwrapped ? (isTaker ? result.value()[0] : result.value()) : result;
  17240. };
  17241. });
  17242. // Add `Array` methods to `lodash.prototype`.
  17243. arrayEach(['pop', 'push', 'shift', 'sort', 'splice', 'unshift'], function(methodName) {
  17244. var func = arrayProto[methodName],
  17245. chainName = /^(?:push|sort|unshift)$/.test(methodName) ? 'tap' : 'thru',
  17246. retUnwrapped = /^(?:pop|shift)$/.test(methodName);
  17247. lodash.prototype[methodName] = function() {
  17248. var args = arguments;
  17249. if (retUnwrapped && !this.__chain__) {
  17250. var value = this.value();
  17251. return func.apply(isArray(value) ? value : [], args);
  17252. }
  17253. return this[chainName](function(value) {
  17254. return func.apply(isArray(value) ? value : [], args);
  17255. });
  17256. };
  17257. });
  17258. // Map minified method names to their real names.
  17259. baseForOwn(LazyWrapper.prototype, function(func, methodName) {
  17260. var lodashFunc = lodash[methodName];
  17261. if (lodashFunc) {
  17262. var key = (lodashFunc.name + ''),
  17263. names = realNames[key] || (realNames[key] = []);
  17264. names.push({ 'name': methodName, 'func': lodashFunc });
  17265. }
  17266. });
  17267. realNames[createHybrid(undefined, WRAP_BIND_KEY_FLAG).name] = [{
  17268. 'name': 'wrapper',
  17269. 'func': undefined
  17270. }];
  17271. // Add methods to `LazyWrapper`.
  17272. LazyWrapper.prototype.clone = lazyClone;
  17273. LazyWrapper.prototype.reverse = lazyReverse;
  17274. LazyWrapper.prototype.value = lazyValue;
  17275. // Add chain sequence methods to the `lodash` wrapper.
  17276. lodash.prototype.at = wrapperAt;
  17277. lodash.prototype.chain = wrapperChain;
  17278. lodash.prototype.commit = wrapperCommit;
  17279. lodash.prototype.next = wrapperNext;
  17280. lodash.prototype.plant = wrapperPlant;
  17281. lodash.prototype.reverse = wrapperReverse;
  17282. lodash.prototype.toJSON = lodash.prototype.valueOf = lodash.prototype.value = wrapperValue;
  17283. // Add lazy aliases.
  17284. lodash.prototype.first = lodash.prototype.head;
  17285. if (symIterator) {
  17286. lodash.prototype[symIterator] = wrapperToIterator;
  17287. }
  17288. return lodash;
  17289. });
  17290. /*--------------------------------------------------------------------------*/
  17291. // Export lodash.
  17292. var _ = runInContext();
  17293. // Some AMD build optimizers, like r.js, check for condition patterns like:
  17294. if (typeof define == 'function' && typeof define.amd == 'object' && define.amd) {
  17295. // Expose Lodash on the global object to prevent errors when Lodash is
  17296. // loaded by a script tag in the presence of an AMD loader.
  17297. // See http://requirejs.org/docs/errors.html#mismatch for more details.
  17298. // Use `_.noConflict` to remove Lodash from the global object.
  17299. root._ = _;
  17300. // Define as an anonymous module so, through path mapping, it can be
  17301. // referenced as the "underscore" module.
  17302. define(function() {
  17303. return _;
  17304. });
  17305. }
  17306. // Check for `exports` after `define` in case a build optimizer adds it.
  17307. else if (freeModule) {
  17308. // Export for Node.js.
  17309. (freeModule.exports = _)._ = _;
  17310. // Export for CommonJS support.
  17311. freeExports._ = _;
  17312. }
  17313. else {
  17314. // Export to the global object.
  17315. root._ = _;
  17316. }
  17317. }.call(this));
  17318. }).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
  17319. },{}],14:[function(require,module,exports){
  17320. /*
  17321. * Lexical analysis and token construction.
  17322. */
  17323. "use strict";
  17324. var _ = require("lodash");
  17325. var events = require("events");
  17326. var reg = require("./reg.js");
  17327. var state = require("./state.js").state;
  17328. var unicodeData = require("../data/ascii-identifier-data.js");
  17329. var asciiIdentifierStartTable = unicodeData.asciiIdentifierStartTable;
  17330. var asciiIdentifierPartTable = unicodeData.asciiIdentifierPartTable;
  17331. var nonAsciiIdentifierStartTable = require("../data/non-ascii-identifier-start.js");
  17332. var nonAsciiIdentifierPartTable = require("../data/non-ascii-identifier-part-only.js");
  17333. // Loading of this module is deferred as an optimization for ES2015 input
  17334. var es5IdentifierNames;
  17335. // Some of these token types are from JavaScript Parser API
  17336. // while others are specific to JSHint parser.
  17337. // JS Parser API: https://developer.mozilla.org/en-US/docs/SpiderMonkey/Parser_API
  17338. var Token = {
  17339. Identifier: 1,
  17340. Punctuator: 2,
  17341. NumericLiteral: 3,
  17342. StringLiteral: 4,
  17343. Comment: 5,
  17344. Keyword: 6,
  17345. RegExp: 9,
  17346. TemplateHead: 10,
  17347. TemplateMiddle: 11,
  17348. TemplateTail: 12,
  17349. NoSubstTemplate: 13
  17350. };
  17351. var Context = {
  17352. Block: 1,
  17353. Template: 2
  17354. };
  17355. function isHex(str) {
  17356. return /^[0-9a-fA-F]+$/.test(str);
  17357. }
  17358. function isHexDigit(str) {
  17359. return str.length === 1 && isHex(str);
  17360. }
  17361. // Object that handles postponed lexing verifications that checks the parsed
  17362. // environment state.
  17363. function asyncTrigger() {
  17364. var _checks = [];
  17365. return {
  17366. push: function(fn) {
  17367. _checks.push(fn);
  17368. },
  17369. check: function() {
  17370. for (var check = 0; check < _checks.length; ++check) {
  17371. _checks[check]();
  17372. }
  17373. _checks.splice(0, _checks.length);
  17374. }
  17375. };
  17376. }
  17377. /*
  17378. * Lexer for JSHint.
  17379. *
  17380. * This object does a char-by-char scan of the provided source code
  17381. * and produces a sequence of tokens.
  17382. *
  17383. * var lex = new Lexer("var i = 0;");
  17384. * lex.start();
  17385. * lex.token(); // returns the next token
  17386. *
  17387. * You have to use the token() method to move the lexer forward
  17388. * but you don't have to use its return value to get tokens. In addition
  17389. * to token() method returning the next token, the Lexer object also
  17390. * emits events.
  17391. *
  17392. * lex.on("Identifier", function(data) {
  17393. * if (data.name.indexOf("_") >= 0) {
  17394. * // Produce a warning.
  17395. * }
  17396. * });
  17397. *
  17398. * Note that the token() method returns tokens in a JSLint-compatible
  17399. * format while the event emitter uses a slightly modified version of
  17400. * Mozilla's JavaScript Parser API. Eventually, we will move away from
  17401. * JSLint format.
  17402. */
  17403. function Lexer(source) {
  17404. var lines = source;
  17405. if (typeof lines === "string") {
  17406. lines = lines
  17407. .replace(/\r\n/g, "\n")
  17408. .replace(/\r/g, "\n")
  17409. .split("\n");
  17410. }
  17411. // If the first line is a shebang (#!), make it a blank and move on.
  17412. // Shebangs are used by Node scripts.
  17413. if (lines[0] && lines[0].substr(0, 2) === "#!") {
  17414. if (lines[0].indexOf("node") !== -1) {
  17415. state.option.node = true;
  17416. }
  17417. lines[0] = "";
  17418. }
  17419. this.emitter = new events.EventEmitter();
  17420. this.source = source;
  17421. this.setLines(lines);
  17422. this.prereg = true;
  17423. this.line = 0;
  17424. this.char = 1;
  17425. this.from = 1;
  17426. this.input = "";
  17427. this.inComment = false;
  17428. this.context = [];
  17429. this.templateStarts = [];
  17430. for (var i = 0; i < state.option.indent; i += 1) {
  17431. state.tab += " ";
  17432. }
  17433. }
  17434. Lexer.prototype = {
  17435. _lines: [],
  17436. inContext: function(ctxType) {
  17437. return this.context.length > 0 && this.context[this.context.length - 1].type === ctxType;
  17438. },
  17439. pushContext: function(ctxType) {
  17440. this.context.push({ type: ctxType });
  17441. },
  17442. popContext: function() {
  17443. return this.context.pop();
  17444. },
  17445. currentContext: function() {
  17446. return this.context.length > 0 && this.context[this.context.length - 1];
  17447. },
  17448. getLines: function() {
  17449. this._lines = state.lines;
  17450. return this._lines;
  17451. },
  17452. setLines: function(val) {
  17453. this._lines = val;
  17454. state.lines = this._lines;
  17455. },
  17456. /*
  17457. * Return the next i character without actually moving the
  17458. * char pointer.
  17459. */
  17460. peek: function(i) {
  17461. return this.input.charAt(i || 0);
  17462. },
  17463. /*
  17464. * Move the char pointer forward i times.
  17465. */
  17466. skip: function(i) {
  17467. i = i || 1;
  17468. this.char += i;
  17469. this.input = this.input.slice(i);
  17470. },
  17471. /*
  17472. * Subscribe to a token event. The API for this method is similar
  17473. * Underscore.js i.e. you can subscribe to multiple events with
  17474. * one call:
  17475. *
  17476. * lex.on("Identifier Number", function(data) {
  17477. * // ...
  17478. * });
  17479. */
  17480. on: function(names, listener) {
  17481. names.split(" ").forEach(function(name) {
  17482. this.emitter.on(name, listener);
  17483. }.bind(this));
  17484. },
  17485. /*
  17486. * Trigger a token event. All arguments will be passed to each
  17487. * listener.
  17488. */
  17489. trigger: function() {
  17490. this.emitter.emit.apply(this.emitter, Array.prototype.slice.call(arguments));
  17491. },
  17492. /*
  17493. * Postpone a token event. the checking condition is set as
  17494. * last parameter, and the trigger function is called in a
  17495. * stored callback. To be later called using the check() function
  17496. * by the parser. This avoids parser's peek() to give the lexer
  17497. * a false context.
  17498. */
  17499. triggerAsync: function(type, args, checks, fn) {
  17500. checks.push(function() {
  17501. if (fn()) {
  17502. this.trigger(type, args);
  17503. }
  17504. }.bind(this));
  17505. },
  17506. /*
  17507. * Extract a punctuator out of the next sequence of characters
  17508. * or return 'null' if its not possible.
  17509. *
  17510. * This method's implementation was heavily influenced by the
  17511. * scanPunctuator function in the Esprima parser's source code.
  17512. */
  17513. scanPunctuator: function() {
  17514. var ch1 = this.peek();
  17515. var ch2, ch3, ch4;
  17516. switch (ch1) {
  17517. // Most common single-character punctuators
  17518. case ".":
  17519. if ((/^[0-9]$/).test(this.peek(1))) {
  17520. return null;
  17521. }
  17522. if (this.peek(1) === "." && this.peek(2) === ".") {
  17523. return {
  17524. type: Token.Punctuator,
  17525. value: "..."
  17526. };
  17527. }
  17528. /* falls through */
  17529. case "(":
  17530. case ")":
  17531. case ";":
  17532. case ",":
  17533. case "[":
  17534. case "]":
  17535. case ":":
  17536. case "~":
  17537. case "?":
  17538. return {
  17539. type: Token.Punctuator,
  17540. value: ch1
  17541. };
  17542. // A block/object opener
  17543. case "{":
  17544. this.pushContext(Context.Block);
  17545. return {
  17546. type: Token.Punctuator,
  17547. value: ch1
  17548. };
  17549. // A block/object closer
  17550. case "}":
  17551. if (this.inContext(Context.Block)) {
  17552. this.popContext();
  17553. }
  17554. return {
  17555. type: Token.Punctuator,
  17556. value: ch1
  17557. };
  17558. // A pound sign (for Node shebangs)
  17559. case "#":
  17560. return {
  17561. type: Token.Punctuator,
  17562. value: ch1
  17563. };
  17564. // We're at the end of input
  17565. case "":
  17566. return null;
  17567. }
  17568. // Peek more characters
  17569. ch2 = this.peek(1);
  17570. ch3 = this.peek(2);
  17571. ch4 = this.peek(3);
  17572. // 4-character punctuator: >>>=
  17573. if (ch1 === ">" && ch2 === ">" && ch3 === ">" && ch4 === "=") {
  17574. return {
  17575. type: Token.Punctuator,
  17576. value: ">>>="
  17577. };
  17578. }
  17579. // 3-character punctuators: === !== >>> <<= >>=
  17580. if (ch1 === "=" && ch2 === "=" && ch3 === "=") {
  17581. return {
  17582. type: Token.Punctuator,
  17583. value: "==="
  17584. };
  17585. }
  17586. if (ch1 === "!" && ch2 === "=" && ch3 === "=") {
  17587. return {
  17588. type: Token.Punctuator,
  17589. value: "!=="
  17590. };
  17591. }
  17592. if (ch1 === ">" && ch2 === ">" && ch3 === ">") {
  17593. return {
  17594. type: Token.Punctuator,
  17595. value: ">>>"
  17596. };
  17597. }
  17598. if (ch1 === "<" && ch2 === "<" && ch3 === "=") {
  17599. return {
  17600. type: Token.Punctuator,
  17601. value: "<<="
  17602. };
  17603. }
  17604. if (ch1 === ">" && ch2 === ">" && ch3 === "=") {
  17605. return {
  17606. type: Token.Punctuator,
  17607. value: ">>="
  17608. };
  17609. }
  17610. // Fat arrow punctuator
  17611. if (ch1 === "=" && ch2 === ">") {
  17612. return {
  17613. type: Token.Punctuator,
  17614. value: ch1 + ch2
  17615. };
  17616. }
  17617. // 2-character punctuators: <= >= == != ++ -- << >> && ||
  17618. // += -= *= %= &= |= ^= /=
  17619. if (ch1 === ch2 && ("+-<>&|".indexOf(ch1) >= 0)) {
  17620. return {
  17621. type: Token.Punctuator,
  17622. value: ch1 + ch2
  17623. };
  17624. }
  17625. if ("<>=!+-*%&|^/".indexOf(ch1) >= 0) {
  17626. if (ch2 === "=") {
  17627. return {
  17628. type: Token.Punctuator,
  17629. value: ch1 + ch2
  17630. };
  17631. }
  17632. return {
  17633. type: Token.Punctuator,
  17634. value: ch1
  17635. };
  17636. }
  17637. return null;
  17638. },
  17639. /*
  17640. * Extract a comment out of the next sequence of characters and/or
  17641. * lines or return 'null' if its not possible. Since comments can
  17642. * span across multiple lines this method has to move the char
  17643. * pointer.
  17644. *
  17645. * In addition to normal JavaScript comments (// and /*) this method
  17646. * also recognizes JSHint- and JSLint-specific comments such as
  17647. * /*jshint, /*jslint, /*globals and so on.
  17648. */
  17649. scanComments: function(checks) {
  17650. var ch1 = this.peek();
  17651. var ch2 = this.peek(1);
  17652. var rest = this.input.substr(2);
  17653. var startLine = this.line;
  17654. var startChar = this.char;
  17655. var self = this;
  17656. // Create a comment token object and make sure it
  17657. // has all the data JSHint needs to work with special
  17658. // comments.
  17659. function commentToken(label, body, opt) {
  17660. var special = ["jshint", "jslint", "members", "member", "globals", "global", "exported"];
  17661. var isSpecial = false;
  17662. var value = label + body;
  17663. var commentType = "plain";
  17664. opt = opt || {};
  17665. if (opt.isMultiline) {
  17666. value += "*/";
  17667. }
  17668. body = body.replace(/\n/g, " ");
  17669. if (label === "/*" && reg.fallsThrough.test(body)) {
  17670. isSpecial = true;
  17671. commentType = "falls through";
  17672. }
  17673. special.forEach(function(str) {
  17674. if (isSpecial) {
  17675. return;
  17676. }
  17677. // Don't recognize any special comments other than jshint for single-line
  17678. // comments. This introduced many problems with legit comments.
  17679. if (label === "//" && str !== "jshint") {
  17680. return;
  17681. }
  17682. if (body.charAt(str.length) === " " && body.substr(0, str.length) === str) {
  17683. isSpecial = true;
  17684. label = label + str;
  17685. body = body.substr(str.length);
  17686. }
  17687. if (!isSpecial && body.charAt(0) === " " && body.charAt(str.length + 1) === " " &&
  17688. body.substr(1, str.length) === str) {
  17689. isSpecial = true;
  17690. label = label + " " + str;
  17691. body = body.substr(str.length + 1);
  17692. }
  17693. // To handle rarer case when special word is separated from label by
  17694. // multiple spaces or tabs
  17695. var strIndex = body.indexOf(str);
  17696. if (!isSpecial && strIndex >= 0 && body.charAt(strIndex + str.length) === " ") {
  17697. var isAllWhitespace = body.substr(0, strIndex).trim().length === 0;
  17698. if (isAllWhitespace) {
  17699. isSpecial = true;
  17700. body = body.substr(str.length + strIndex);
  17701. }
  17702. }
  17703. if (!isSpecial) {
  17704. return;
  17705. }
  17706. switch (str) {
  17707. case "member":
  17708. commentType = "members";
  17709. break;
  17710. case "global":
  17711. commentType = "globals";
  17712. break;
  17713. default:
  17714. var options = body.split(":").map(function(v) {
  17715. return v.replace(/^\s+/, "").replace(/\s+$/, "");
  17716. });
  17717. if (options.length === 2) {
  17718. switch (options[0]) {
  17719. case "ignore":
  17720. switch (options[1]) {
  17721. case "start":
  17722. self.ignoringLinterErrors = true;
  17723. isSpecial = false;
  17724. break;
  17725. case "end":
  17726. self.ignoringLinterErrors = false;
  17727. isSpecial = false;
  17728. break;
  17729. }
  17730. }
  17731. }
  17732. commentType = str;
  17733. }
  17734. });
  17735. return {
  17736. type: Token.Comment,
  17737. commentType: commentType,
  17738. value: value,
  17739. body: body,
  17740. isSpecial: isSpecial,
  17741. isMalformed: opt.isMalformed || false
  17742. };
  17743. }
  17744. // End of unbegun comment. Raise an error and skip that input.
  17745. if (ch1 === "*" && ch2 === "/") {
  17746. this.trigger("error", {
  17747. code: "E018",
  17748. line: startLine,
  17749. character: startChar
  17750. });
  17751. this.skip(2);
  17752. return null;
  17753. }
  17754. // Comments must start either with // or /*
  17755. if (ch1 !== "/" || (ch2 !== "*" && ch2 !== "/")) {
  17756. return null;
  17757. }
  17758. // One-line comment
  17759. if (ch2 === "/") {
  17760. this.skip(this.input.length); // Skip to the EOL.
  17761. return commentToken("//", rest);
  17762. }
  17763. var body = "";
  17764. /* Multi-line comment */
  17765. if (ch2 === "*") {
  17766. this.inComment = true;
  17767. this.skip(2);
  17768. while (this.peek() !== "*" || this.peek(1) !== "/") {
  17769. if (this.peek() === "") { // End of Line
  17770. body += "\n";
  17771. // If we hit EOF and our comment is still unclosed,
  17772. // trigger an error and end the comment implicitly.
  17773. if (!this.nextLine(checks)) {
  17774. this.trigger("error", {
  17775. code: "E017",
  17776. line: startLine,
  17777. character: startChar
  17778. });
  17779. this.inComment = false;
  17780. return commentToken("/*", body, {
  17781. isMultiline: true,
  17782. isMalformed: true
  17783. });
  17784. }
  17785. } else {
  17786. body += this.peek();
  17787. this.skip();
  17788. }
  17789. }
  17790. this.skip(2);
  17791. this.inComment = false;
  17792. return commentToken("/*", body, { isMultiline: true });
  17793. }
  17794. },
  17795. /*
  17796. * Extract a keyword out of the next sequence of characters or
  17797. * return 'null' if its not possible.
  17798. */
  17799. scanKeyword: function() {
  17800. var result = /^[a-zA-Z_$][a-zA-Z0-9_$]*/.exec(this.input);
  17801. var keywords = [
  17802. "if", "in", "do", "var", "for", "new",
  17803. "try", "let", "this", "else", "case",
  17804. "void", "with", "enum", "while", "break",
  17805. "catch", "throw", "const", "yield", "class",
  17806. "super", "return", "typeof", "delete",
  17807. "switch", "export", "import", "default",
  17808. "finally", "extends", "function", "continue",
  17809. "debugger", "instanceof", "true", "false", "null"
  17810. ];
  17811. if (result && keywords.indexOf(result[0]) >= 0) {
  17812. return {
  17813. type: Token.Keyword,
  17814. value: result[0]
  17815. };
  17816. }
  17817. return null;
  17818. },
  17819. /*
  17820. * Extract a JavaScript identifier out of the next sequence of
  17821. * characters or return 'null' if its not possible.
  17822. */
  17823. scanIdentifier: function(checks) {
  17824. var id = "";
  17825. var index = 0;
  17826. var char, value;
  17827. function isNonAsciiIdentifierStart(code) {
  17828. return nonAsciiIdentifierStartTable.indexOf(code) > -1;
  17829. }
  17830. function isNonAsciiIdentifierPart(code) {
  17831. return isNonAsciiIdentifierStart(code) || nonAsciiIdentifierPartTable.indexOf(code) > -1;
  17832. }
  17833. var readUnicodeEscapeSequence = function() {
  17834. /*jshint validthis:true */
  17835. index += 1;
  17836. if (this.peek(index) !== "u") {
  17837. return null;
  17838. }
  17839. var sequence = this.peek(index + 1) + this.peek(index + 2) +
  17840. this.peek(index + 3) + this.peek(index + 4);
  17841. var code;
  17842. if (isHex(sequence)) {
  17843. code = parseInt(sequence, 16);
  17844. if (asciiIdentifierPartTable[code] || isNonAsciiIdentifierPart(code)) {
  17845. index += 5;
  17846. return "\\u" + sequence;
  17847. }
  17848. return null;
  17849. }
  17850. return null;
  17851. }.bind(this);
  17852. var getIdentifierStart = function() {
  17853. /*jshint validthis:true */
  17854. var chr = this.peek(index);
  17855. var code = chr.charCodeAt(0);
  17856. if (code === 92) {
  17857. return readUnicodeEscapeSequence();
  17858. }
  17859. if (code < 128) {
  17860. if (asciiIdentifierStartTable[code]) {
  17861. index += 1;
  17862. return chr;
  17863. }
  17864. return null;
  17865. }
  17866. if (isNonAsciiIdentifierStart(code)) {
  17867. index += 1;
  17868. return chr;
  17869. }
  17870. return null;
  17871. }.bind(this);
  17872. var getIdentifierPart = function() {
  17873. /*jshint validthis:true */
  17874. var chr = this.peek(index);
  17875. var code = chr.charCodeAt(0);
  17876. if (code === 92) {
  17877. return readUnicodeEscapeSequence();
  17878. }
  17879. if (code < 128) {
  17880. if (asciiIdentifierPartTable[code]) {
  17881. index += 1;
  17882. return chr;
  17883. }
  17884. return null;
  17885. }
  17886. if (isNonAsciiIdentifierPart(code)) {
  17887. index += 1;
  17888. return chr;
  17889. }
  17890. return null;
  17891. }.bind(this);
  17892. function removeEscapeSequences(id) {
  17893. return id.replace(/\\u([0-9a-fA-F]{4})/g, function(m0, codepoint) {
  17894. return String.fromCharCode(parseInt(codepoint, 16));
  17895. });
  17896. }
  17897. char = getIdentifierStart();
  17898. if (char === null) {
  17899. return null;
  17900. }
  17901. id = char;
  17902. for (;;) {
  17903. char = getIdentifierPart();
  17904. if (char === null) {
  17905. break;
  17906. }
  17907. id += char;
  17908. }
  17909. value = removeEscapeSequences(id);
  17910. if (!state.inES6(true)) {
  17911. es5IdentifierNames = require("../data/es5-identifier-names.js");
  17912. if (!es5IdentifierNames.test(value)) {
  17913. this.triggerAsync(
  17914. "warning",
  17915. {
  17916. code: "W119",
  17917. line: this.line,
  17918. character: this.char,
  17919. data: ["unicode 8", "6"]
  17920. },
  17921. checks,
  17922. function() { return true; }
  17923. );
  17924. }
  17925. }
  17926. return {
  17927. type: Token.Identifier,
  17928. value: value,
  17929. text: id,
  17930. tokenLength: id.length
  17931. };
  17932. },
  17933. /*
  17934. * Extract a numeric literal out of the next sequence of
  17935. * characters or return 'null' if its not possible. This method
  17936. * supports all numeric literals described in section 7.8.3
  17937. * of the EcmaScript 5 specification.
  17938. *
  17939. * This method's implementation was heavily influenced by the
  17940. * scanNumericLiteral function in the Esprima parser's source code.
  17941. */
  17942. scanNumericLiteral: function(checks) {
  17943. var index = 0;
  17944. var value = "";
  17945. var length = this.input.length;
  17946. var char = this.peek(index);
  17947. var isAllowedDigit = isDecimalDigit;
  17948. var base = 10;
  17949. var isLegacy = false;
  17950. function isDecimalDigit(str) {
  17951. return (/^[0-9]$/).test(str);
  17952. }
  17953. function isOctalDigit(str) {
  17954. return (/^[0-7]$/).test(str);
  17955. }
  17956. function isBinaryDigit(str) {
  17957. return (/^[01]$/).test(str);
  17958. }
  17959. function isIdentifierStart(ch) {
  17960. return (ch === "$") || (ch === "_") || (ch === "\\") ||
  17961. (ch >= "a" && ch <= "z") || (ch >= "A" && ch <= "Z");
  17962. }
  17963. // Numbers must start either with a decimal digit or a point.
  17964. if (char !== "." && !isDecimalDigit(char)) {
  17965. return null;
  17966. }
  17967. if (char !== ".") {
  17968. value = this.peek(index);
  17969. index += 1;
  17970. char = this.peek(index);
  17971. if (value === "0") {
  17972. // Base-16 numbers.
  17973. if (char === "x" || char === "X") {
  17974. isAllowedDigit = isHexDigit;
  17975. base = 16;
  17976. index += 1;
  17977. value += char;
  17978. }
  17979. // Base-8 numbers.
  17980. if (char === "o" || char === "O") {
  17981. isAllowedDigit = isOctalDigit;
  17982. base = 8;
  17983. if (!state.inES6(true)) {
  17984. this.triggerAsync(
  17985. "warning",
  17986. {
  17987. code: "W119",
  17988. line: this.line,
  17989. character: this.char,
  17990. data: [ "Octal integer literal", "6" ]
  17991. },
  17992. checks,
  17993. function() { return true; }
  17994. );
  17995. }
  17996. index += 1;
  17997. value += char;
  17998. }
  17999. // Base-2 numbers.
  18000. if (char === "b" || char === "B") {
  18001. isAllowedDigit = isBinaryDigit;
  18002. base = 2;
  18003. if (!state.inES6(true)) {
  18004. this.triggerAsync(
  18005. "warning",
  18006. {
  18007. code: "W119",
  18008. line: this.line,
  18009. character: this.char,
  18010. data: [ "Binary integer literal", "6" ]
  18011. },
  18012. checks,
  18013. function() { return true; }
  18014. );
  18015. }
  18016. index += 1;
  18017. value += char;
  18018. }
  18019. // Legacy base-8 numbers.
  18020. if (isOctalDigit(char)) {
  18021. isAllowedDigit = isOctalDigit;
  18022. base = 8;
  18023. isLegacy = true;
  18024. index += 1;
  18025. value += char;
  18026. }
  18027. // Decimal numbers that start with '0' such as '09' are illegal
  18028. // but we still parse them and return as malformed.
  18029. if (!isOctalDigit(char) && isDecimalDigit(char)) {
  18030. index += 1;
  18031. value += char;
  18032. }
  18033. }
  18034. while (index < length) {
  18035. char = this.peek(index);
  18036. // Numbers like '019' (note the 9) are not valid octals
  18037. // but we still parse them and mark as malformed.
  18038. if (!(isLegacy && isDecimalDigit(char)) && !isAllowedDigit(char)) {
  18039. break;
  18040. }
  18041. value += char;
  18042. index += 1;
  18043. }
  18044. if (isAllowedDigit !== isDecimalDigit) {
  18045. if (!isLegacy && value.length <= 2) { // 0x
  18046. return {
  18047. type: Token.NumericLiteral,
  18048. value: value,
  18049. isMalformed: true
  18050. };
  18051. }
  18052. if (index < length) {
  18053. char = this.peek(index);
  18054. if (isIdentifierStart(char)) {
  18055. return null;
  18056. }
  18057. }
  18058. return {
  18059. type: Token.NumericLiteral,
  18060. value: value,
  18061. base: base,
  18062. isLegacy: isLegacy,
  18063. isMalformed: false
  18064. };
  18065. }
  18066. }
  18067. // Decimal digits.
  18068. if (char === ".") {
  18069. value += char;
  18070. index += 1;
  18071. while (index < length) {
  18072. char = this.peek(index);
  18073. if (!isDecimalDigit(char)) {
  18074. break;
  18075. }
  18076. value += char;
  18077. index += 1;
  18078. }
  18079. }
  18080. // Exponent part.
  18081. if (char === "e" || char === "E") {
  18082. value += char;
  18083. index += 1;
  18084. char = this.peek(index);
  18085. if (char === "+" || char === "-") {
  18086. value += this.peek(index);
  18087. index += 1;
  18088. }
  18089. char = this.peek(index);
  18090. if (isDecimalDigit(char)) {
  18091. value += char;
  18092. index += 1;
  18093. while (index < length) {
  18094. char = this.peek(index);
  18095. if (!isDecimalDigit(char)) {
  18096. break;
  18097. }
  18098. value += char;
  18099. index += 1;
  18100. }
  18101. } else {
  18102. return null;
  18103. }
  18104. }
  18105. if (index < length) {
  18106. char = this.peek(index);
  18107. if (isIdentifierStart(char)) {
  18108. return null;
  18109. }
  18110. }
  18111. return {
  18112. type: Token.NumericLiteral,
  18113. value: value,
  18114. base: base,
  18115. isMalformed: !isFinite(value)
  18116. };
  18117. },
  18118. // Assumes previously parsed character was \ (=== '\\') and was not skipped.
  18119. scanEscapeSequence: function(checks) {
  18120. var allowNewLine = false;
  18121. var jump = 1;
  18122. this.skip();
  18123. var char = this.peek();
  18124. switch (char) {
  18125. case "'":
  18126. this.triggerAsync("warning", {
  18127. code: "W114",
  18128. line: this.line,
  18129. character: this.char,
  18130. data: [ "\\'" ]
  18131. }, checks, function() {return state.jsonMode; });
  18132. break;
  18133. case "b":
  18134. char = "\\b";
  18135. break;
  18136. case "f":
  18137. char = "\\f";
  18138. break;
  18139. case "n":
  18140. char = "\\n";
  18141. break;
  18142. case "r":
  18143. char = "\\r";
  18144. break;
  18145. case "t":
  18146. char = "\\t";
  18147. break;
  18148. case "0":
  18149. char = "\\0";
  18150. // Octal literals fail in strict mode.
  18151. // Check if the number is between 00 and 07.
  18152. var n = parseInt(this.peek(1), 10);
  18153. this.triggerAsync("warning", {
  18154. code: "W115",
  18155. line: this.line,
  18156. character: this.char
  18157. }, checks,
  18158. function() { return n >= 0 && n <= 7 && state.isStrict(); });
  18159. break;
  18160. case "1":
  18161. case "2":
  18162. case "3":
  18163. case "4":
  18164. case "5":
  18165. case "6":
  18166. case "7":
  18167. char = "\\" + char;
  18168. this.triggerAsync("warning", {
  18169. code: "W115",
  18170. line: this.line,
  18171. character: this.char
  18172. }, checks,
  18173. function() { return state.isStrict(); });
  18174. break;
  18175. case "u":
  18176. var sequence = this.input.substr(1, 4);
  18177. var code = parseInt(sequence, 16);
  18178. if (!isHex(sequence)) {
  18179. // This condition unequivocally describes a syntax error.
  18180. // TODO: Re-factor as an "error" (not a "warning").
  18181. this.trigger("warning", {
  18182. code: "W052",
  18183. line: this.line,
  18184. character: this.char,
  18185. data: [ "u" + sequence ]
  18186. });
  18187. }
  18188. char = String.fromCharCode(code);
  18189. jump = 5;
  18190. break;
  18191. case "v":
  18192. this.triggerAsync("warning", {
  18193. code: "W114",
  18194. line: this.line,
  18195. character: this.char,
  18196. data: [ "\\v" ]
  18197. }, checks, function() { return state.jsonMode; });
  18198. char = "\v";
  18199. break;
  18200. case "x":
  18201. var x = parseInt(this.input.substr(1, 2), 16);
  18202. this.triggerAsync("warning", {
  18203. code: "W114",
  18204. line: this.line,
  18205. character: this.char,
  18206. data: [ "\\x-" ]
  18207. }, checks, function() { return state.jsonMode; });
  18208. char = String.fromCharCode(x);
  18209. jump = 3;
  18210. break;
  18211. case "\\":
  18212. char = "\\\\";
  18213. break;
  18214. case "\"":
  18215. char = "\\\"";
  18216. break;
  18217. case "/":
  18218. break;
  18219. case "":
  18220. allowNewLine = true;
  18221. char = "";
  18222. break;
  18223. }
  18224. return { char: char, jump: jump, allowNewLine: allowNewLine };
  18225. },
  18226. /*
  18227. * Extract a template literal out of the next sequence of characters
  18228. * and/or lines or return 'null' if its not possible. Since template
  18229. * literals can span across multiple lines, this method has to move
  18230. * the char pointer.
  18231. */
  18232. scanTemplateLiteral: function(checks) {
  18233. var tokenType;
  18234. var value = "";
  18235. var ch;
  18236. var startLine = this.line;
  18237. var startChar = this.char;
  18238. var depth = this.templateStarts.length;
  18239. if (this.peek() === "`") {
  18240. if (!state.inES6(true)) {
  18241. this.triggerAsync(
  18242. "warning",
  18243. {
  18244. code: "W119",
  18245. line: this.line,
  18246. character: this.char,
  18247. data: ["template literal syntax", "6"]
  18248. },
  18249. checks,
  18250. function() { return true; }
  18251. );
  18252. }
  18253. // Template must start with a backtick.
  18254. tokenType = Token.TemplateHead;
  18255. this.templateStarts.push({ line: this.line, char: this.char });
  18256. depth = this.templateStarts.length;
  18257. this.skip(1);
  18258. this.pushContext(Context.Template);
  18259. } else if (this.inContext(Context.Template) && this.peek() === "}") {
  18260. // If we're in a template context, and we have a '}', lex a TemplateMiddle.
  18261. tokenType = Token.TemplateMiddle;
  18262. } else {
  18263. // Go lex something else.
  18264. return null;
  18265. }
  18266. while (this.peek() !== "`") {
  18267. while ((ch = this.peek()) === "") {
  18268. value += "\n";
  18269. if (!this.nextLine(checks)) {
  18270. // Unclosed template literal --- point to the starting "`"
  18271. var startPos = this.templateStarts.pop();
  18272. this.trigger("error", {
  18273. code: "E052",
  18274. line: startPos.line,
  18275. character: startPos.char
  18276. });
  18277. return {
  18278. type: tokenType,
  18279. value: value,
  18280. startLine: startLine,
  18281. startChar: startChar,
  18282. isUnclosed: true,
  18283. depth: depth,
  18284. context: this.popContext()
  18285. };
  18286. }
  18287. }
  18288. if (ch === '$' && this.peek(1) === '{') {
  18289. value += '${';
  18290. this.skip(2);
  18291. return {
  18292. type: tokenType,
  18293. value: value,
  18294. startLine: startLine,
  18295. startChar: startChar,
  18296. isUnclosed: false,
  18297. depth: depth,
  18298. context: this.currentContext()
  18299. };
  18300. } else if (ch === '\\') {
  18301. var escape = this.scanEscapeSequence(checks);
  18302. value += escape.char;
  18303. this.skip(escape.jump);
  18304. } else if (ch !== '`') {
  18305. // Otherwise, append the value and continue.
  18306. value += ch;
  18307. this.skip(1);
  18308. }
  18309. }
  18310. // Final value is either NoSubstTemplate or TemplateTail
  18311. tokenType = tokenType === Token.TemplateHead ? Token.NoSubstTemplate : Token.TemplateTail;
  18312. this.skip(1);
  18313. this.templateStarts.pop();
  18314. return {
  18315. type: tokenType,
  18316. value: value,
  18317. startLine: startLine,
  18318. startChar: startChar,
  18319. isUnclosed: false,
  18320. depth: depth,
  18321. context: this.popContext()
  18322. };
  18323. },
  18324. /*
  18325. * Extract a string out of the next sequence of characters and/or
  18326. * lines or return 'null' if its not possible. Since strings can
  18327. * span across multiple lines this method has to move the char
  18328. * pointer.
  18329. *
  18330. * This method recognizes pseudo-multiline JavaScript strings:
  18331. *
  18332. * var str = "hello\
  18333. * world";
  18334. */
  18335. scanStringLiteral: function(checks) {
  18336. /*jshint loopfunc:true */
  18337. var quote = this.peek();
  18338. // String must start with a quote.
  18339. if (quote !== "\"" && quote !== "'") {
  18340. return null;
  18341. }
  18342. // In JSON strings must always use double quotes.
  18343. this.triggerAsync("warning", {
  18344. code: "W108",
  18345. line: this.line,
  18346. character: this.char // +1?
  18347. }, checks, function() { return state.jsonMode && quote !== "\""; });
  18348. var value = "";
  18349. var startLine = this.line;
  18350. var startChar = this.char;
  18351. var allowNewLine = false;
  18352. this.skip();
  18353. while (this.peek() !== quote) {
  18354. if (this.peek() === "") { // End Of Line
  18355. // If an EOL is not preceded by a backslash, show a warning
  18356. // and proceed like it was a legit multi-line string where
  18357. // author simply forgot to escape the newline symbol.
  18358. //
  18359. // Another approach is to implicitly close a string on EOL
  18360. // but it generates too many false positives.
  18361. if (!allowNewLine) {
  18362. // This condition unequivocally describes a syntax error.
  18363. // TODO: Emit error E029 and remove W112.
  18364. this.trigger("warning", {
  18365. code: "W112",
  18366. line: this.line,
  18367. character: this.char
  18368. });
  18369. } else {
  18370. allowNewLine = false;
  18371. // Otherwise show a warning if multistr option was not set.
  18372. // For JSON, show warning no matter what.
  18373. this.triggerAsync("warning", {
  18374. code: "W043",
  18375. line: this.line,
  18376. character: this.char
  18377. }, checks, function() { return !state.option.multistr; });
  18378. this.triggerAsync("warning", {
  18379. code: "W042",
  18380. line: this.line,
  18381. character: this.char
  18382. }, checks, function() { return state.jsonMode && state.option.multistr; });
  18383. }
  18384. // If we get an EOF inside of an unclosed string, show an
  18385. // error and implicitly close it at the EOF point.
  18386. if (!this.nextLine(checks)) {
  18387. return {
  18388. type: Token.StringLiteral,
  18389. value: value,
  18390. startLine: startLine,
  18391. startChar: startChar,
  18392. isUnclosed: true,
  18393. quote: quote
  18394. };
  18395. }
  18396. } else { // Any character other than End Of Line
  18397. allowNewLine = false;
  18398. var char = this.peek();
  18399. var jump = 1; // A length of a jump, after we're done
  18400. // parsing this character.
  18401. if (char < " ") {
  18402. // Warn about a control character in a string.
  18403. this.triggerAsync(
  18404. "warning",
  18405. {
  18406. code: "W113",
  18407. line: this.line,
  18408. character: this.char,
  18409. data: [ "<non-printable>" ]
  18410. },
  18411. checks,
  18412. function() { return true; }
  18413. );
  18414. }
  18415. // Special treatment for some escaped characters.
  18416. if (char === "\\") {
  18417. var parsed = this.scanEscapeSequence(checks);
  18418. char = parsed.char;
  18419. jump = parsed.jump;
  18420. allowNewLine = parsed.allowNewLine;
  18421. }
  18422. // If char is the empty string, end of the line has been reached. In
  18423. // this case, `this.char` should not be incremented so that warnings
  18424. // and errors reported in the subsequent loop iteration have the
  18425. // correct character column offset.
  18426. if (char !== "") {
  18427. value += char;
  18428. this.skip(jump);
  18429. }
  18430. }
  18431. }
  18432. this.skip();
  18433. return {
  18434. type: Token.StringLiteral,
  18435. value: value,
  18436. startLine: startLine,
  18437. startChar: startChar,
  18438. isUnclosed: false,
  18439. quote: quote
  18440. };
  18441. },
  18442. /*
  18443. * Extract a regular expression out of the next sequence of
  18444. * characters and/or lines or return 'null' if its not possible.
  18445. *
  18446. * This method is platform dependent: it accepts almost any
  18447. * regular expression values but then tries to compile and run
  18448. * them using system's RegExp object. This means that there are
  18449. * rare edge cases where one JavaScript engine complains about
  18450. * your regular expression while others don't.
  18451. */
  18452. scanRegExp: function(checks) {
  18453. var index = 0;
  18454. var length = this.input.length;
  18455. var char = this.peek();
  18456. var value = char;
  18457. var body = "";
  18458. var flags = [];
  18459. var malformed = false;
  18460. var isCharSet = false;
  18461. var terminated, malformedDesc;
  18462. var scanUnexpectedChars = function() {
  18463. // Unexpected control character
  18464. if (char < " ") {
  18465. malformed = true;
  18466. this.triggerAsync(
  18467. "warning",
  18468. {
  18469. code: "W048",
  18470. line: this.line,
  18471. character: this.char
  18472. },
  18473. checks,
  18474. function() { return true; }
  18475. );
  18476. }
  18477. // Unexpected escaped character
  18478. if (char === "<") {
  18479. malformed = true;
  18480. this.triggerAsync(
  18481. "warning",
  18482. {
  18483. code: "W049",
  18484. line: this.line,
  18485. character: this.char,
  18486. data: [ char ]
  18487. },
  18488. checks,
  18489. function() { return true; }
  18490. );
  18491. }
  18492. }.bind(this);
  18493. // Regular expressions must start with '/'
  18494. if (!this.prereg || char !== "/") {
  18495. return null;
  18496. }
  18497. index += 1;
  18498. terminated = false;
  18499. // Try to get everything in between slashes. A couple of
  18500. // cases aside (see scanUnexpectedChars) we don't really
  18501. // care whether the resulting expression is valid or not.
  18502. // We will check that later using the RegExp object.
  18503. while (index < length) {
  18504. char = this.peek(index);
  18505. value += char;
  18506. body += char;
  18507. if (isCharSet) {
  18508. if (char === "]") {
  18509. if (this.peek(index - 1) !== "\\" || this.peek(index - 2) === "\\") {
  18510. isCharSet = false;
  18511. }
  18512. }
  18513. if (char === "\\") {
  18514. index += 1;
  18515. char = this.peek(index);
  18516. body += char;
  18517. value += char;
  18518. scanUnexpectedChars();
  18519. }
  18520. index += 1;
  18521. continue;
  18522. }
  18523. if (char === "\\") {
  18524. index += 1;
  18525. char = this.peek(index);
  18526. body += char;
  18527. value += char;
  18528. scanUnexpectedChars();
  18529. if (char === "/") {
  18530. index += 1;
  18531. continue;
  18532. }
  18533. if (char === "[") {
  18534. index += 1;
  18535. continue;
  18536. }
  18537. }
  18538. if (char === "[") {
  18539. isCharSet = true;
  18540. index += 1;
  18541. continue;
  18542. }
  18543. if (char === "/") {
  18544. body = body.substr(0, body.length - 1);
  18545. terminated = true;
  18546. index += 1;
  18547. break;
  18548. }
  18549. index += 1;
  18550. }
  18551. // A regular expression that was never closed is an
  18552. // error from which we cannot recover.
  18553. if (!terminated) {
  18554. this.trigger("error", {
  18555. code: "E015",
  18556. line: this.line,
  18557. character: this.from
  18558. });
  18559. return void this.trigger("fatal", {
  18560. line: this.line,
  18561. from: this.from
  18562. });
  18563. }
  18564. // Parse flags (if any).
  18565. while (index < length) {
  18566. char = this.peek(index);
  18567. if (!/[gimy]/.test(char)) {
  18568. break;
  18569. }
  18570. if (char === "y") {
  18571. if (!state.inES6(true)) {
  18572. this.triggerAsync(
  18573. "warning",
  18574. {
  18575. code: "W119",
  18576. line: this.line,
  18577. character: this.char,
  18578. data: [ "Sticky RegExp flag", "6" ]
  18579. },
  18580. checks,
  18581. function() { return true; }
  18582. );
  18583. }
  18584. if (value.indexOf("y") > -1) {
  18585. malformedDesc = "Duplicate RegExp flag";
  18586. }
  18587. } else {
  18588. flags.push(char);
  18589. }
  18590. value += char;
  18591. index += 1;
  18592. }
  18593. // Check regular expression for correctness.
  18594. try {
  18595. new RegExp(body, flags.join(""));
  18596. } catch (err) {
  18597. /**
  18598. * Because JSHint relies on the current engine's RegExp parser to
  18599. * validate RegExp literals, the description (exposed as the "data"
  18600. * property on the error object) is platform dependent.
  18601. */
  18602. malformedDesc = err.message;
  18603. }
  18604. if (malformedDesc) {
  18605. malformed = true;
  18606. this.trigger("error", {
  18607. code: "E016",
  18608. line: this.line,
  18609. character: this.char,
  18610. data: [ malformedDesc ]
  18611. });
  18612. }
  18613. return {
  18614. type: Token.RegExp,
  18615. value: value,
  18616. isMalformed: malformed
  18617. };
  18618. },
  18619. /*
  18620. * Scan for any occurrence of non-breaking spaces. Non-breaking spaces
  18621. * can be mistakenly typed on OS X with option-space. Non UTF-8 web
  18622. * pages with non-breaking pages produce syntax errors.
  18623. */
  18624. scanNonBreakingSpaces: function() {
  18625. return state.option.nonbsp ?
  18626. this.input.search(/(\u00A0)/) : -1;
  18627. },
  18628. /*
  18629. * Produce the next raw token or return 'null' if no tokens can be matched.
  18630. * This method skips over all space characters.
  18631. */
  18632. next: function(checks) {
  18633. this.from = this.char;
  18634. // Move to the next non-space character.
  18635. while (reg.whitespace.test(this.peek())) {
  18636. this.from += 1;
  18637. this.skip();
  18638. }
  18639. // Methods that work with multi-line structures and move the
  18640. // character pointer.
  18641. var match = this.scanComments(checks) ||
  18642. this.scanStringLiteral(checks) ||
  18643. this.scanTemplateLiteral(checks);
  18644. if (match) {
  18645. return match;
  18646. }
  18647. // Methods that don't move the character pointer.
  18648. match =
  18649. this.scanRegExp(checks) ||
  18650. this.scanPunctuator() ||
  18651. this.scanKeyword() ||
  18652. this.scanIdentifier(checks) ||
  18653. this.scanNumericLiteral(checks);
  18654. if (match) {
  18655. this.skip(match.tokenLength || match.value.length);
  18656. return match;
  18657. }
  18658. // No token could be matched, give up.
  18659. return null;
  18660. },
  18661. /*
  18662. * Switch to the next line and reset all char pointers. Once
  18663. * switched, this method also checks for other minor warnings.
  18664. */
  18665. nextLine: function(checks) {
  18666. var char;
  18667. if (this.line >= this.getLines().length) {
  18668. return false;
  18669. }
  18670. this.input = this.getLines()[this.line];
  18671. this.line += 1;
  18672. this.char = 1;
  18673. this.from = 1;
  18674. var inputTrimmed = this.input.trim();
  18675. var startsWith = function() {
  18676. return _.some(arguments, function(prefix) {
  18677. return inputTrimmed.indexOf(prefix) === 0;
  18678. });
  18679. };
  18680. var endsWith = function() {
  18681. return _.some(arguments, function(suffix) {
  18682. return inputTrimmed.indexOf(suffix, inputTrimmed.length - suffix.length) !== -1;
  18683. });
  18684. };
  18685. // If we are ignoring linter errors, replace the input with empty string
  18686. // if it doesn't already at least start or end a multi-line comment
  18687. if (this.ignoringLinterErrors === true) {
  18688. if (!startsWith("/*", "//") && !(this.inComment && endsWith("*/"))) {
  18689. this.input = "";
  18690. }
  18691. }
  18692. char = this.scanNonBreakingSpaces();
  18693. if (char >= 0) {
  18694. this.triggerAsync(
  18695. "warning",
  18696. { code: "W125", line: this.line, character: char + 1 },
  18697. checks,
  18698. function() { return true; }
  18699. );
  18700. }
  18701. this.input = this.input.replace(/\t/g, state.tab);
  18702. // If there is a limit on line length, warn when lines get too
  18703. // long.
  18704. if (!this.ignoringLinterErrors && state.option.maxlen &&
  18705. state.option.maxlen < this.input.length) {
  18706. var inComment = this.inComment ||
  18707. startsWith.call(inputTrimmed, "//") ||
  18708. startsWith.call(inputTrimmed, "/*");
  18709. var shouldTriggerError = !inComment || !reg.maxlenException.test(inputTrimmed);
  18710. if (shouldTriggerError) {
  18711. this.triggerAsync(
  18712. "warning",
  18713. { code: "W101", line: this.line, character: this.input.length },
  18714. checks,
  18715. function() { return true; }
  18716. );
  18717. }
  18718. }
  18719. return true;
  18720. },
  18721. /*
  18722. * Produce the next token. This function is called by advance() to get
  18723. * the next token. It returns a token in a JSLint-compatible format.
  18724. */
  18725. token: function() {
  18726. /*jshint loopfunc:true */
  18727. var checks = asyncTrigger();
  18728. var token;
  18729. function isReserved(token, isProperty) {
  18730. // At present all current identifiers have reserved set.
  18731. // Preserving check anyway, for future-proofing.
  18732. /* istanbul ignore if */
  18733. if (!token.reserved) {
  18734. return false;
  18735. }
  18736. var meta = token.meta;
  18737. if (meta && meta.isFutureReservedWord && state.inES5()) {
  18738. // ES3 FutureReservedWord in an ES5 environment.
  18739. if (!meta.es5) {
  18740. return false;
  18741. }
  18742. // Some ES5 FutureReservedWord identifiers are active only
  18743. // within a strict mode environment.
  18744. if (meta.strictOnly) {
  18745. if (!state.option.strict && !state.isStrict()) {
  18746. return false;
  18747. }
  18748. }
  18749. if (isProperty) {
  18750. return false;
  18751. }
  18752. }
  18753. return true;
  18754. }
  18755. // Produce a token object.
  18756. var create = function(type, value, isProperty, token) {
  18757. /*jshint validthis:true */
  18758. var obj;
  18759. if (type !== "(endline)" && type !== "(end)") {
  18760. this.prereg = false;
  18761. }
  18762. if (type === "(punctuator)") {
  18763. switch (value) {
  18764. case ".":
  18765. case ")":
  18766. case "~":
  18767. case "#":
  18768. case "]":
  18769. case "}":
  18770. case "++":
  18771. case "--":
  18772. this.prereg = false;
  18773. break;
  18774. default:
  18775. this.prereg = true;
  18776. }
  18777. obj = Object.create(state.syntax[value] || state.syntax["(error)"]);
  18778. }
  18779. if (type === "(identifier)") {
  18780. if (value === "return" || value === "case" || value === "yield" ||
  18781. value === "typeof" || value === "instanceof" || value === "void") {
  18782. this.prereg = true;
  18783. }
  18784. if (_.has(state.syntax, value)) {
  18785. obj = Object.create(state.syntax[value]);
  18786. // If this can't be a reserved keyword, reset the object.
  18787. if (!isReserved(obj, isProperty && type === "(identifier)")) {
  18788. obj = null;
  18789. }
  18790. }
  18791. }
  18792. if (type === "(template)" || type === "(template middle)") {
  18793. this.prereg = true;
  18794. }
  18795. if (!obj) {
  18796. obj = Object.create(state.syntax[type]);
  18797. }
  18798. obj.identifier = (type === "(identifier)");
  18799. obj.type = obj.type || type;
  18800. obj.value = value;
  18801. obj.line = this.line;
  18802. obj.character = this.char;
  18803. obj.from = this.from;
  18804. if (obj.identifier && token) obj.raw_text = token.text || token.value;
  18805. if (token && token.startLine && token.startLine !== this.line) {
  18806. obj.startLine = token.startLine;
  18807. }
  18808. if (token && token.context) {
  18809. // Context of current token
  18810. obj.context = token.context;
  18811. }
  18812. if (token && token.depth) {
  18813. // Nested template depth
  18814. obj.depth = token.depth;
  18815. }
  18816. if (token && token.isUnclosed) {
  18817. // Mark token as unclosed string / template literal
  18818. obj.isUnclosed = token.isUnclosed;
  18819. }
  18820. if (isProperty && obj.identifier) {
  18821. obj.isProperty = isProperty;
  18822. }
  18823. obj.check = checks.check;
  18824. return obj;
  18825. }.bind(this);
  18826. for (;;) {
  18827. if (!this.input.length) {
  18828. if (this.nextLine(checks)) {
  18829. return create("(endline)", "");
  18830. }
  18831. if (this.exhausted) {
  18832. return null;
  18833. }
  18834. this.exhausted = true;
  18835. return create("(end)", "");
  18836. }
  18837. token = this.next(checks);
  18838. if (!token) {
  18839. if (this.input.length) {
  18840. // Unexpected character.
  18841. this.trigger("error", {
  18842. code: "E024",
  18843. line: this.line,
  18844. character: this.char,
  18845. data: [ this.peek() ]
  18846. });
  18847. this.input = "";
  18848. }
  18849. continue;
  18850. }
  18851. switch (token.type) {
  18852. case Token.StringLiteral:
  18853. this.triggerAsync("String", {
  18854. line: this.line,
  18855. char: this.char,
  18856. from: this.from,
  18857. startLine: token.startLine,
  18858. startChar: token.startChar,
  18859. value: token.value,
  18860. quote: token.quote
  18861. }, checks, function() { return true; });
  18862. return create("(string)", token.value, null, token);
  18863. case Token.TemplateHead:
  18864. this.trigger("TemplateHead", {
  18865. line: this.line,
  18866. char: this.char,
  18867. from: this.from,
  18868. startLine: token.startLine,
  18869. startChar: token.startChar,
  18870. value: token.value
  18871. });
  18872. return create("(template)", token.value, null, token);
  18873. case Token.TemplateMiddle:
  18874. this.trigger("TemplateMiddle", {
  18875. line: this.line,
  18876. char: this.char,
  18877. from: this.from,
  18878. startLine: token.startLine,
  18879. startChar: token.startChar,
  18880. value: token.value
  18881. });
  18882. return create("(template middle)", token.value, null, token);
  18883. case Token.TemplateTail:
  18884. this.trigger("TemplateTail", {
  18885. line: this.line,
  18886. char: this.char,
  18887. from: this.from,
  18888. startLine: token.startLine,
  18889. startChar: token.startChar,
  18890. value: token.value
  18891. });
  18892. return create("(template tail)", token.value, null, token);
  18893. case Token.NoSubstTemplate:
  18894. this.trigger("NoSubstTemplate", {
  18895. line: this.line,
  18896. char: this.char,
  18897. from: this.from,
  18898. startLine: token.startLine,
  18899. startChar: token.startChar,
  18900. value: token.value
  18901. });
  18902. return create("(no subst template)", token.value, null, token);
  18903. case Token.Identifier:
  18904. this.triggerAsync("Identifier", {
  18905. line: this.line,
  18906. char: this.char,
  18907. from: this.from,
  18908. name: token.value,
  18909. raw_name: token.text,
  18910. isProperty: state.tokens.curr.id === "."
  18911. }, checks, function() { return true; });
  18912. /* falls through */
  18913. case Token.Keyword:
  18914. return create("(identifier)", token.value, state.tokens.curr.id === ".", token);
  18915. case Token.NumericLiteral:
  18916. if (token.isMalformed) {
  18917. // This condition unequivocally describes a syntax error.
  18918. // TODO: Re-factor as an "error" (not a "warning").
  18919. this.trigger("warning", {
  18920. code: "W045",
  18921. line: this.line,
  18922. character: this.char,
  18923. data: [ token.value ]
  18924. });
  18925. }
  18926. this.triggerAsync("warning", {
  18927. code: "W114",
  18928. line: this.line,
  18929. character: this.char,
  18930. data: [ "0x-" ]
  18931. }, checks, function() { return token.base === 16 && state.jsonMode; });
  18932. this.triggerAsync("warning", {
  18933. code: "W115",
  18934. line: this.line,
  18935. character: this.char
  18936. }, checks, function() {
  18937. return state.isStrict() && token.base === 8 && token.isLegacy;
  18938. });
  18939. this.trigger("Number", {
  18940. line: this.line,
  18941. char: this.char,
  18942. from: this.from,
  18943. value: token.value,
  18944. base: token.base,
  18945. isMalformed: token.isMalformed
  18946. });
  18947. return create("(number)", token.value);
  18948. case Token.RegExp:
  18949. return create("(regexp)", token.value);
  18950. case Token.Comment:
  18951. if (token.isSpecial) {
  18952. return {
  18953. id: '(comment)',
  18954. value: token.value,
  18955. body: token.body,
  18956. type: token.commentType,
  18957. isSpecial: token.isSpecial,
  18958. line: this.line,
  18959. character: this.char,
  18960. from: this.from
  18961. };
  18962. }
  18963. break;
  18964. default:
  18965. return create("(punctuator)", token.value);
  18966. }
  18967. }
  18968. }
  18969. };
  18970. exports.Lexer = Lexer;
  18971. exports.Context = Context;
  18972. },{"../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){
  18973. "use strict";
  18974. var _ = require("lodash");
  18975. var errors = {
  18976. // JSHint options
  18977. E001: "Bad option: '{a}'.",
  18978. E002: "Bad option value.",
  18979. // JSHint input
  18980. E003: "Expected a JSON value.",
  18981. E004: "Input is neither a string nor an array of strings.",
  18982. E005: "Input is empty.",
  18983. E006: "Unexpected early end of program.",
  18984. // Strict mode
  18985. E007: "Missing \"use strict\" statement.",
  18986. E008: "Strict violation.",
  18987. E009: "Option 'validthis' can't be used in a global scope.",
  18988. E010: "'with' is not allowed in strict mode.",
  18989. // Constants
  18990. E011: "'{a}' has already been declared.",
  18991. E012: "const '{a}' is initialized to 'undefined'.",
  18992. E013: "Attempting to override '{a}' which is a constant.",
  18993. // Regular expressions
  18994. E014: "A regular expression literal can be confused with '/='.",
  18995. E015: "Unclosed regular expression.",
  18996. E016: "Invalid regular expression.",
  18997. // Tokens
  18998. E017: "Unclosed comment.",
  18999. E018: "Unbegun comment.",
  19000. E019: "Unmatched '{a}'.",
  19001. E020: "Expected '{a}' to match '{b}' from line {c} and instead saw '{d}'.",
  19002. E021: "Expected '{a}' and instead saw '{b}'.",
  19003. E022: "Line breaking error '{a}'.",
  19004. E023: "Missing '{a}'.",
  19005. E024: "Unexpected '{a}'.",
  19006. E025: "Missing ':' on a case clause.",
  19007. E026: "Missing '}' to match '{' from line {a}.",
  19008. E027: "Missing ']' to match '[' from line {a}.",
  19009. E028: "Illegal comma.",
  19010. E029: "Unclosed string.",
  19011. // Everything else
  19012. E030: "Expected an identifier and instead saw '{a}'.",
  19013. E031: "Bad assignment.", // FIXME: Rephrase
  19014. E032: "Expected a small integer or 'false' and instead saw '{a}'.",
  19015. E033: "Expected an operator and instead saw '{a}'.",
  19016. E034: "get/set are ES5 features.",
  19017. E035: "Missing property name.",
  19018. E036: "Expected to see a statement and instead saw a block.",
  19019. E037: null,
  19020. E038: null,
  19021. E039: "Function declarations are not invocable. Wrap the whole function invocation in parens.",
  19022. E040: "Each value should have its own case label.",
  19023. E041: "Unrecoverable syntax error.",
  19024. E042: "Stopping.",
  19025. E043: "Too many errors.",
  19026. E044: null,
  19027. E045: "Invalid for each loop.",
  19028. E046: "Yield expressions may only occur within generator functions.",
  19029. E047: null,
  19030. E048: "{a} declaration not directly within block.",
  19031. E049: "A {a} cannot be named '{b}'.",
  19032. E050: "Mozilla requires the yield expression to be parenthesized here.",
  19033. E051: null,
  19034. E052: "Unclosed template literal.",
  19035. E053: "{a} declarations are only allowed at the top level of module scope.",
  19036. E054: "Class properties must be methods. Expected '(' but instead saw '{a}'.",
  19037. E055: "The '{a}' option cannot be set after any executable code.",
  19038. E056: "'{a}' was used before it was declared, which is illegal for '{b}' variables.",
  19039. E057: "Invalid meta property: '{a}.{b}'.",
  19040. E058: "Missing semicolon.",
  19041. E059: "Incompatible values for the '{a}' and '{b}' linting options.",
  19042. E060: "Non-callable values cannot be used as the second operand to instanceof.",
  19043. E061: "Invalid position for 'yield' expression (consider wrapping in parenthesis).",
  19044. E062: "Rest parameter does not a support default value.",
  19045. E063: "Super property may only be used within method bodies.",
  19046. E064: "Super call may only be used within class method bodies."
  19047. };
  19048. var warnings = {
  19049. W001: "'hasOwnProperty' is a really bad name.",
  19050. W002: "Value of '{a}' may be overwritten in IE 8 and earlier.",
  19051. W003: "'{a}' was used before it was defined.",
  19052. W004: "'{a}' is already defined.",
  19053. W005: "A dot following a number can be confused with a decimal point.",
  19054. W006: "Confusing minuses.",
  19055. W007: "Confusing plusses.",
  19056. W008: "A leading decimal point can be confused with a dot: '{a}'.",
  19057. W009: "The array literal notation [] is preferable.",
  19058. W010: "The object literal notation {} is preferable.",
  19059. W011: null,
  19060. W012: null,
  19061. W013: null,
  19062. W014: "Misleading line break before '{a}'; readers may interpret this as an expression boundary.",
  19063. W015: null,
  19064. W016: "Unexpected use of '{a}'.",
  19065. W017: "Bad operand.",
  19066. W018: "Confusing use of '{a}'.",
  19067. W019: "Use the isNaN function to compare with NaN.",
  19068. W020: "Read only.",
  19069. W021: "Reassignment of '{a}', which is a {b}. " +
  19070. "Use 'var' or 'let' to declare bindings that may change.",
  19071. W022: "Do not assign to the exception parameter.",
  19072. W023: null,
  19073. W024: "Expected an identifier and instead saw '{a}' (a reserved word).",
  19074. W025: "Missing name in function declaration.",
  19075. W026: "Inner functions should be listed at the top of the outer function.",
  19076. W027: "Unreachable '{a}' after '{b}'.",
  19077. W028: "Label '{a}' on {b} statement.",
  19078. W030: "Expected an assignment or function call and instead saw an expression.",
  19079. W031: "Do not use 'new' for side effects.",
  19080. W032: "Unnecessary semicolon.",
  19081. W033: "Missing semicolon.",
  19082. W034: "Unnecessary directive \"{a}\".",
  19083. W035: "Empty block.",
  19084. W036: "Unexpected /*member '{a}'.",
  19085. W037: "'{a}' is a statement label.",
  19086. W038: "'{a}' used out of scope.",
  19087. W039: "'{a}' is not allowed.",
  19088. W040: "If a strict mode function is executed using function invocation, " +
  19089. "its 'this' value will be undefined.",
  19090. W041: null,
  19091. W042: "Avoid EOL escaping.",
  19092. W043: "Bad escaping of EOL. Use option multistr if needed.",
  19093. W044: "Bad or unnecessary escaping.", /* TODO(caitp): remove W044 */
  19094. W045: "Bad number '{a}'.",
  19095. W046: "Don't use extra leading zeros '{a}'.",
  19096. W047: "A trailing decimal point can be confused with a dot: '{a}'.",
  19097. W048: "Unexpected control character in regular expression.",
  19098. W049: "Unexpected escaped character '{a}' in regular expression.",
  19099. W050: "JavaScript URL.",
  19100. W051: "Variables should not be deleted.",
  19101. W052: "Unexpected '{a}'.",
  19102. W053: "Do not use {a} as a constructor.",
  19103. W054: "The Function constructor is a form of eval.",
  19104. W055: "A constructor name should start with an uppercase letter.",
  19105. W056: "Bad constructor.",
  19106. W057: "Weird construction. Is 'new' necessary?",
  19107. W058: "Missing '()' invoking a constructor.",
  19108. W059: "Avoid arguments.{a}.",
  19109. W060: "document.write can be a form of eval.",
  19110. W061: "eval can be harmful.",
  19111. W062: "Wrap an immediate function invocation in parens " +
  19112. "to assist the reader in understanding that the expression " +
  19113. "is the result of a function, and not the function itself.",
  19114. W063: "Math is not a function.",
  19115. W064: "Missing 'new' prefix when invoking a constructor.",
  19116. W065: "Missing radix parameter.",
  19117. W066: "Implied eval. Consider passing a function instead of a string.",
  19118. W067: "Bad invocation.",
  19119. W068: "Wrapping non-IIFE function literals in parens is unnecessary.",
  19120. W069: "['{a}'] is better written in dot notation.",
  19121. W070: "Extra comma. (it breaks older versions of IE)",
  19122. W071: "This function has too many statements. ({a})",
  19123. W072: "This function has too many parameters. ({a})",
  19124. W073: "Blocks are nested too deeply. ({a})",
  19125. W074: "This function's cyclomatic complexity is too high. ({a})",
  19126. W075: "Duplicate {a} '{b}'.",
  19127. W076: "Unexpected parameter '{a}' in get {b} function.",
  19128. W077: "Expected a single parameter in set {a} function.",
  19129. W078: "Setter is defined without getter.",
  19130. W079: "Redefinition of '{a}'.",
  19131. W080: "It's not necessary to initialize '{a}' to 'undefined'.",
  19132. W081: null,
  19133. W082: "Function declarations should not be placed in blocks. " +
  19134. "Use a function expression or move the statement to the top of " +
  19135. "the outer function.",
  19136. W083: "Functions declared within loops referencing an outer scoped " +
  19137. "variable may lead to confusing semantics. ({a})",
  19138. W084: "Expected a conditional expression and instead saw an assignment.",
  19139. W085: "Don't use 'with'.",
  19140. W086: "Expected a 'break' statement before '{a}'.",
  19141. W087: "Forgotten 'debugger' statement?",
  19142. W088: "Creating global 'for' variable. Should be 'for (var {a} ...'.",
  19143. W089: "The body of a for in should be wrapped in an if statement to filter " +
  19144. "unwanted properties from the prototype.",
  19145. W090: "'{a}' is not a statement label.",
  19146. W091: null,
  19147. W093: "Did you mean to return a conditional instead of an assignment?",
  19148. W094: "Unexpected comma.",
  19149. W095: "Expected a string and instead saw {a}.",
  19150. W096: "The '{a}' key may produce unexpected results.",
  19151. W097: "Use the function form of \"use strict\".",
  19152. W098: "'{a}' is defined but never used.",
  19153. W099: null,
  19154. W100: null,
  19155. W101: "Line is too long.",
  19156. W102: null,
  19157. W103: "The '{a}' property is deprecated.",
  19158. W104: "'{a}' is available in ES{b} (use 'esversion: {b}') or Mozilla JS extensions (use moz).",
  19159. W105: "Unexpected {a} in '{b}'.",
  19160. W106: "Identifier '{a}' is not in camel case.",
  19161. W107: "Script URL.",
  19162. W108: "Strings must use doublequote.",
  19163. W109: "Strings must use singlequote.",
  19164. W110: "Mixed double and single quotes.",
  19165. W112: "Unclosed string.",
  19166. W113: "Control character in string: {a}.",
  19167. W114: "Avoid {a}.",
  19168. W115: "Octal literals are not allowed in strict mode.",
  19169. W116: "Expected '{a}' and instead saw '{b}'.",
  19170. W117: "'{a}' is not defined.",
  19171. W118: "'{a}' is only available in Mozilla JavaScript extensions (use moz option).",
  19172. W119: "'{a}' is only available in ES{b} (use 'esversion: {b}').",
  19173. W120: "You might be leaking a variable ({a}) here.",
  19174. W121: "Extending prototype of native object: '{a}'.",
  19175. W122: "Invalid typeof value '{a}'",
  19176. W123: "'{a}' is already defined in outer scope.",
  19177. W124: "A generator function should contain at least one yield expression.",
  19178. W125: "This line contains non-breaking spaces: http://jshint.com/docs/options/#nonbsp",
  19179. W126: "Unnecessary grouping operator.",
  19180. W127: "Unexpected use of a comma operator.",
  19181. W128: "Empty array elements require elision=true.",
  19182. W129: "'{a}' is defined in a future version of JavaScript. Use a " +
  19183. "different variable name to avoid migration issues.",
  19184. W130: "Invalid element after rest element.",
  19185. W131: "Invalid parameter after rest parameter.",
  19186. W132: "`var` declarations are forbidden. Use `let` or `const` instead.",
  19187. W133: "Invalid for-{a} loop left-hand-side: {b}.",
  19188. W134: "The '{a}' option is only available when linting ECMAScript {b} code.",
  19189. W135: "{a} may not be supported by non-browser environments.",
  19190. W136: "'{a}' must be in function scope.",
  19191. W137: "Empty destructuring: this is unnecessary and can be removed.",
  19192. W138: "Regular parameters should not come after default parameters.",
  19193. W139: "Function expressions should not be used as the second operand to instanceof.",
  19194. W140: "Missing comma.",
  19195. W141: "Empty {a}: this is unnecessary and can be removed.",
  19196. W142: "Empty {a}: consider replacing with `import '{b}';`.",
  19197. W143: "Assignment to properties of a mapped arguments object may cause " +
  19198. "unexpected changes to formal parameters."
  19199. };
  19200. var info = {
  19201. I001: "Comma warnings can be turned off with 'laxcomma'.",
  19202. I002: null,
  19203. I003: "ES5 option is now set per default"
  19204. };
  19205. exports.errors = {};
  19206. exports.warnings = {};
  19207. exports.info = {};
  19208. _.each(errors, function(desc, code) {
  19209. exports.errors[code] = { code: code, desc: desc };
  19210. });
  19211. _.each(warnings, function(desc, code) {
  19212. exports.warnings[code] = { code: code, desc: desc };
  19213. });
  19214. _.each(info, function(desc, code) {
  19215. exports.info[code] = { code: code, desc: desc };
  19216. });
  19217. },{"lodash":13}],16:[function(require,module,exports){
  19218. "use strict";
  19219. function NameStack() {
  19220. this._stack = [];
  19221. }
  19222. Object.defineProperty(NameStack.prototype, "length", {
  19223. get: function() {
  19224. return this._stack.length;
  19225. }
  19226. });
  19227. /**
  19228. * Create a new entry in the stack. Useful for tracking names across
  19229. * expressions.
  19230. */
  19231. NameStack.prototype.push = function() {
  19232. this._stack.push(null);
  19233. };
  19234. /**
  19235. * Discard the most recently-created name on the stack.
  19236. */
  19237. NameStack.prototype.pop = function() {
  19238. this._stack.pop();
  19239. };
  19240. /**
  19241. * Update the most recent name on the top of the stack.
  19242. *
  19243. * @param {object} token The token to consider as the source for the most
  19244. * recent name.
  19245. */
  19246. NameStack.prototype.set = function(token) {
  19247. this._stack[this.length - 1] = token;
  19248. };
  19249. /**
  19250. * Generate a string representation of the most recent name.
  19251. *
  19252. * @returns {string}
  19253. */
  19254. NameStack.prototype.infer = function() {
  19255. var nameToken = this._stack[this.length - 1];
  19256. var prefix = "";
  19257. var type;
  19258. // During expected operation, the topmost entry on the stack will only
  19259. // reflect the current function's name when the function is declared without
  19260. // the `function` keyword (i.e. for in-line accessor methods). In other
  19261. // cases, the `function` expression itself will introduce an empty entry on
  19262. // the top of the stack, and this should be ignored.
  19263. if (!nameToken || nameToken.type === "class") {
  19264. nameToken = this._stack[this.length - 2];
  19265. }
  19266. if (!nameToken) {
  19267. return "(empty)";
  19268. }
  19269. type = nameToken.type;
  19270. if (type !== "(string)" && type !== "(number)" && type !== "(identifier)" && type !== "default") {
  19271. return "(expression)";
  19272. }
  19273. if (nameToken.accessorType) {
  19274. prefix = nameToken.accessorType + " ";
  19275. }
  19276. return prefix + nameToken.value;
  19277. };
  19278. module.exports = NameStack;
  19279. },{}],17:[function(require,module,exports){
  19280. "use strict";
  19281. // These are the JSHint boolean options.
  19282. exports.bool = {
  19283. enforcing: {
  19284. /**
  19285. * This option prohibits the use of bitwise operators such as `^` (XOR),
  19286. * `|` (OR) and others. Bitwise operators are very rare in JavaScript
  19287. * programs and quite often `&` is simply a mistyped `&&`.
  19288. */
  19289. bitwise : true,
  19290. /**
  19291. *
  19292. * This options prohibits overwriting prototypes of native objects such as
  19293. * `Array`, `Date` and so on.
  19294. *
  19295. * // jshint freeze:true
  19296. * Array.prototype.count = function (value) { return 4; };
  19297. * // -> Warning: Extending prototype of native object: 'Array'.
  19298. */
  19299. freeze : true,
  19300. /**
  19301. * This option allows you to force all variable names to use either
  19302. * camelCase style or UPPER_CASE with underscores.
  19303. *
  19304. * @deprecated JSHint is limiting its scope to issues of code correctness.
  19305. * If you would like to enforce rules relating to code style,
  19306. * check out [the JSCS
  19307. * project](https://github.com/jscs-dev/node-jscs).
  19308. */
  19309. camelcase : true,
  19310. /**
  19311. * This option requires you to always put curly braces around blocks in
  19312. * loops and conditionals. JavaScript allows you to omit curly braces when
  19313. * the block consists of only one statement, for example:
  19314. *
  19315. * while (day)
  19316. * shuffle();
  19317. *
  19318. * However, in some circumstances, it can lead to bugs (you'd think that
  19319. * `sleep()` is a part of the loop while in reality it is not):
  19320. *
  19321. * while (day)
  19322. * shuffle();
  19323. * sleep();
  19324. */
  19325. curly : true,
  19326. /**
  19327. * This options prohibits the use of `==` and `!=` in favor of `===` and
  19328. * `!==`. The former try to coerce values before comparing them which can
  19329. * lead to some unexpected results. The latter don't do any coercion so
  19330. * they are generally safer. If you would like to learn more about type
  19331. * coercion in JavaScript, we recommend [Truth, Equality and
  19332. * JavaScript](http://javascriptweblog.wordpress.com/2011/02/07/truth-equality-and-javascript/)
  19333. * by Angus Croll.
  19334. */
  19335. eqeqeq : true,
  19336. /**
  19337. * This option enables warnings about the use of identifiers which are
  19338. * defined in future versions of JavaScript. Although overwriting them has
  19339. * no effect in contexts where they are not implemented, this practice can
  19340. * cause issues when migrating codebases to newer versions of the language.
  19341. */
  19342. futurehostile: true,
  19343. /**
  19344. * This option tells JSHint that your code needs to adhere to ECMAScript 3
  19345. * specification. Use this option if you need your program to be executable
  19346. * in older browsers—such as Internet Explorer 6/7/8/9—and other legacy
  19347. * JavaScript environments.
  19348. *
  19349. * @deprecated Use `esversion: 3` instead.
  19350. */
  19351. es3 : true,
  19352. /**
  19353. * This option enables syntax first defined in [the ECMAScript 5.1
  19354. * specification](http://es5.github.io/). This includes allowing reserved
  19355. * keywords as object properties.
  19356. *
  19357. * @deprecated Use `esversion: 5` instead.
  19358. */
  19359. es5 : true,
  19360. /**
  19361. * This option requires all `for in` loops to filter object's items. The
  19362. * for in statement allows for looping through the names of all of the
  19363. * properties of an object including those inherited through the prototype
  19364. * chain. This behavior can lead to unexpected items in your object so it
  19365. * is generally safer to always filter inherited properties out as shown in
  19366. * the example:
  19367. *
  19368. * for (key in obj) {
  19369. * if (obj.hasOwnProperty(key)) {
  19370. * // We are sure that obj[key] belongs to the object and was not inherited.
  19371. * }
  19372. * }
  19373. *
  19374. * For more in-depth understanding of `for in` loops in JavaScript, read
  19375. * [Exploring JavaScript for-in
  19376. * loops](http://javascriptweblog.wordpress.com/2011/01/04/exploring-javascript-for-in-loops/)
  19377. * by Angus Croll.
  19378. */
  19379. forin : true,
  19380. /**
  19381. * This option prohibits the use of immediate function invocations without
  19382. * wrapping them in parentheses. Wrapping parentheses assists readers of
  19383. * your code in understanding that the expression is the result of a
  19384. * function, and not the function itself.
  19385. *
  19386. * @deprecated JSHint is limiting its scope to issues of code correctness.
  19387. * If you would like to enforce rules relating to code style,
  19388. * check out [the JSCS
  19389. * project](https://github.com/jscs-dev/node-jscs).
  19390. */
  19391. immed : true,
  19392. /**
  19393. * This option requires you to capitalize names of constructor functions.
  19394. * Capitalizing functions that are intended to be used with `new` operator
  19395. * is just a convention that helps programmers to visually distinguish
  19396. * constructor functions from other types of functions to help spot
  19397. * mistakes when using `this`.
  19398. *
  19399. * Not doing so won't break your code in any browsers or environments but
  19400. * it will be a bit harder to figure out—by reading the code—if the
  19401. * function was supposed to be used with or without new. And this is
  19402. * important because when the function that was intended to be used with
  19403. * `new` is used without it, `this` will point to the global object instead
  19404. * of a new object.
  19405. *
  19406. * @deprecated JSHint is limiting its scope to issues of code correctness.
  19407. * If you would like to enforce rules relating to code style,
  19408. * check out [the JSCS
  19409. * project](https://github.com/jscs-dev/node-jscs).
  19410. */
  19411. newcap : true,
  19412. /**
  19413. * This option prohibits the use of `arguments.caller` and
  19414. * `arguments.callee`. Both `.caller` and `.callee` make quite a few
  19415. * optimizations impossible so they were deprecated in future versions of
  19416. * JavaScript. In fact, ECMAScript 5 forbids the use of `arguments.callee`
  19417. * in strict mode.
  19418. */
  19419. noarg : true,
  19420. /**
  19421. * This option prohibits the use of the comma operator. When misused, the
  19422. * comma operator can obscure the value of a statement and promote
  19423. * incorrect code.
  19424. */
  19425. nocomma : true,
  19426. /**
  19427. * This option warns when you have an empty block in your code. JSLint was
  19428. * originally warning for all empty blocks and we simply made it optional.
  19429. * There were no studies reporting that empty blocks in JavaScript break
  19430. * your code in any way.
  19431. *
  19432. * @deprecated JSHint is limiting its scope to issues of code correctness.
  19433. * If you would like to enforce rules relating to code style,
  19434. * check out [the JSCS
  19435. * project](https://github.com/jscs-dev/node-jscs).
  19436. */
  19437. noempty : true,
  19438. /**
  19439. * This option warns about "non-breaking whitespace" characters. These
  19440. * characters can be entered with option-space on Mac computers and have a
  19441. * potential of breaking non-UTF8 web pages.
  19442. */
  19443. nonbsp : true,
  19444. /**
  19445. * This option prohibits the use of constructor functions for side-effects.
  19446. * Some people like to call constructor functions without assigning its
  19447. * result to any variable:
  19448. *
  19449. * new MyConstructor();
  19450. *
  19451. * There is no advantage in this approach over simply calling
  19452. * `MyConstructor` since the object that the operator `new` creates isn't
  19453. * used anywhere so you should generally avoid constructors like this one.
  19454. */
  19455. nonew : true,
  19456. /**
  19457. * This option prohibits the use of explicitly undeclared variables. This
  19458. * option is very useful for spotting leaking and mistyped variables.
  19459. *
  19460. * // jshint undef:true
  19461. *
  19462. * function test() {
  19463. * var myVar = 'Hello, World';
  19464. * console.log(myvar); // Oops, typoed here. JSHint with undef will complain
  19465. * }
  19466. *
  19467. * If your variable is defined in another file, you can use the `global`
  19468. * directive to tell JSHint about it.
  19469. */
  19470. undef : true,
  19471. /**
  19472. * This option prohibits the use of the grouping operator when it is not
  19473. * strictly required. Such usage commonly reflects a misunderstanding of
  19474. * unary operators, for example:
  19475. *
  19476. * // jshint singleGroups: true
  19477. *
  19478. * delete(obj.attr); // Warning: Unnecessary grouping operator.
  19479. */
  19480. singleGroups: false,
  19481. /**
  19482. * When set to true, the use of VariableStatements are forbidden.
  19483. * For example:
  19484. *
  19485. * // jshint varstmt: true
  19486. *
  19487. * var a; // Warning: `var` declarations are forbidden. Use `let` or `const` instead.
  19488. */
  19489. varstmt: false,
  19490. /**
  19491. * This option is a short hand for the most strict JSHint configuration as
  19492. * available in JSHint version 2.6.3. It enables all enforcing options and
  19493. * disables all relaxing options that were defined in that release.
  19494. *
  19495. * @deprecated The option cannot be maintained without automatically opting
  19496. * users in to new features. This can lead to unexpected
  19497. * warnings/errors in when upgrading between minor versions of
  19498. * JSHint.
  19499. */
  19500. enforceall : false,
  19501. /**
  19502. * This option warns when a comma is not placed after the last element in an
  19503. * array or object literal. Due to bugs in old versions of IE, trailing
  19504. * commas used to be discouraged, but since ES5 their semantics were
  19505. * standardized. (See
  19506. * [#11.1.4](http://www.ecma-international.org/ecma-262/5.1/#sec-11.1.4) and
  19507. * [#11.1.5](http://www.ecma-international.org/ecma-262/5.1/#sec-11.1.5).)
  19508. * Now, they help to prevent the same [visual
  19509. * ambiguities](http://www.ecma-international.org/ecma-262/5.1/#sec-7.9.2)
  19510. * that the strict usage of semicolons helps prevent.
  19511. *
  19512. * For example, this code might have worked last Tuesday:
  19513. *
  19514. * [
  19515. * b + c
  19516. * ].forEach(print);
  19517. *
  19518. * But if one adds an element to the array and forgets to compensate for the
  19519. * missing comma, no syntax error is thrown, and a linter cannot determine
  19520. * if this was a mistake or an intentional function invocation.
  19521. *
  19522. * [
  19523. * b + c
  19524. * (d + e)
  19525. * ].forEach(print);
  19526. *
  19527. * If one always appends a list item with a comma, this ambiguity cannot
  19528. * occur:
  19529. *
  19530. * [
  19531. * b + c,
  19532. * ].forEach(print);
  19533. *
  19534. * [
  19535. * b + c,
  19536. * (d + e),
  19537. * ].forEach(print);
  19538. */
  19539. trailingcomma: false
  19540. },
  19541. relaxing: {
  19542. /**
  19543. * This option suppresses warnings about missing semicolons. There is a lot
  19544. * of FUD about semicolon spread by quite a few people in the community.
  19545. * The common myths are that semicolons are required all the time (they are
  19546. * not) and that they are unreliable. JavaScript has rules about semicolons
  19547. * which are followed by *all* browsers so it is up to you to decide
  19548. * whether you should or should not use semicolons in your code.
  19549. *
  19550. * For more information about semicolons in JavaScript read [An Open Letter
  19551. * to JavaScript Leaders Regarding
  19552. * Semicolons](http://blog.izs.me/post/2353458699/an-open-letter-to-javascript-leaders-regarding)
  19553. * by Isaac Schlueter and [JavaScript Semicolon
  19554. * Insertion](http://inimino.org/~inimino/blog/javascript_semicolons).
  19555. */
  19556. asi : true,
  19557. /**
  19558. * This option suppresses warnings about multi-line strings. Multi-line
  19559. * strings can be dangerous in JavaScript because all hell breaks loose if
  19560. * you accidentally put a whitespace in between the escape character (`\`)
  19561. * and a new line.
  19562. *
  19563. * Note that even though this option allows correct multi-line strings, it
  19564. * still warns about multi-line strings without escape characters or with
  19565. * anything in between the escape character and a whitespace.
  19566. *
  19567. * // jshint multistr:true
  19568. *
  19569. * var text = "Hello\
  19570. * World"; // All good.
  19571. *
  19572. * text = "Hello
  19573. * World"; // Warning, no escape character.
  19574. *
  19575. * text = "Hello\
  19576. * World"; // Warning, there is a space after \
  19577. *
  19578. * @deprecated JSHint is limiting its scope to issues of code correctness.
  19579. * If you would like to enforce rules relating to code style,
  19580. * check out [the JSCS
  19581. * project](https://github.com/jscs-dev/node-jscs).
  19582. */
  19583. multistr : true,
  19584. /**
  19585. * This option suppresses warnings about the `debugger` statements in your
  19586. * code.
  19587. */
  19588. debug : true,
  19589. /**
  19590. * This option suppresses warnings about the use of assignments in cases
  19591. * where comparisons are expected. More often than not, code like `if (a =
  19592. * 10) {}` is a typo. However, it can be useful in cases like this one:
  19593. *
  19594. * for (var i = 0, person; person = people[i]; i++) {}
  19595. *
  19596. * You can silence this error on a per-use basis by surrounding the assignment
  19597. * with parenthesis, such as:
  19598. *
  19599. * for (var i = 0, person; (person = people[i]); i++) {}
  19600. */
  19601. boss : true,
  19602. /**
  19603. * This option suppresses warnings about the use of `eval`. The use of
  19604. * `eval` is discouraged because it can make your code vulnerable to
  19605. * various injection attacks and it makes it hard for JavaScript
  19606. * interpreter to do certain optimizations.
  19607. */
  19608. evil : true,
  19609. /**
  19610. * This option suppresses warnings about declaring variables inside
  19611. * of control structures while accessing them later from the outside.
  19612. * Even though identifiers declared with `var` have two real scopes—global
  19613. * and function—such practice leads to confusion among people new to
  19614. * the language and hard-to-debug bugs. This is why, by default, JSHint
  19615. * warns about variables that are used outside of their intended scope.
  19616. *
  19617. * function test() {
  19618. * if (true) {
  19619. * var x = 0;
  19620. * }
  19621. *
  19622. * x += 1; // Default: 'x' used out of scope.
  19623. * // No warning when funcscope:true
  19624. * }
  19625. */
  19626. funcscope : true,
  19627. /**
  19628. * This option suppresses warnings about the use of global strict mode.
  19629. * Global strict mode can break third-party widgets so it is not
  19630. * recommended.
  19631. *
  19632. * For more info about strict mode see the `strict` option.
  19633. *
  19634. * @deprecated Use `strict: "global"`.
  19635. */
  19636. globalstrict: true,
  19637. /**
  19638. * This option suppresses warnings about the `__iterator__` property. This
  19639. * property is not supported by all browsers so use it carefully.
  19640. */
  19641. iterator : true,
  19642. /**
  19643. * This option suppresses warnings about invalid `typeof` operator values.
  19644. * This operator has only [a limited set of possible return
  19645. * values](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/typeof).
  19646. * By default, JSHint warns when you compare its result with an invalid
  19647. * value which often can be a typo.
  19648. *
  19649. * // 'fuction' instead of 'function'
  19650. * if (typeof a == "fuction") { // Invalid typeof value 'fuction'
  19651. * // ...
  19652. * }
  19653. *
  19654. * Do not use this option unless you're absolutely sure you don't want
  19655. * these checks.
  19656. */
  19657. notypeof : true,
  19658. /**
  19659. * This option prohibits the use of unary increment and decrement
  19660. * operators. Some people think that `++` and `--` reduces the quality of
  19661. * their coding styles and there are programming languages—such as
  19662. * Python—that go completely without these operators.
  19663. */
  19664. plusplus : true,
  19665. /**
  19666. * This option suppresses warnings about the `__proto__` property.
  19667. */
  19668. proto : true,
  19669. /**
  19670. * This option suppresses warnings about the use of script-targeted
  19671. * URLs—such as `javascript:...`.
  19672. */
  19673. scripturl : true,
  19674. /**
  19675. * This option suppresses warnings about using `[]` notation when it can be
  19676. * expressed in dot notation: `person['name']` vs. `person.name`.
  19677. *
  19678. * @deprecated JSHint is limiting its scope to issues of code correctness.
  19679. * If you would like to enforce rules relating to code style,
  19680. * check out [the JSCS
  19681. * project](https://github.com/jscs-dev/node-jscs).
  19682. */
  19683. sub : true,
  19684. /**
  19685. * This option suppresses warnings about "weird" constructions like
  19686. * `new function () { ... }` and `new Object;`. Such constructions are
  19687. * sometimes used to produce singletons in JavaScript:
  19688. *
  19689. * var singleton = new function() {
  19690. * var privateVar;
  19691. *
  19692. * this.publicMethod = function () {}
  19693. * this.publicMethod2 = function () {}
  19694. * };
  19695. */
  19696. supernew : true,
  19697. /**
  19698. * This option suppresses most of the warnings about possibly unsafe line
  19699. * breakings in your code. It doesn't suppress warnings about comma-first
  19700. * coding style. To suppress those you have to use `laxcomma` (see below).
  19701. *
  19702. * @deprecated JSHint is limiting its scope to issues of code correctness.
  19703. * If you would like to enforce rules relating to code style,
  19704. * check out [the JSCS
  19705. * project](https://github.com/jscs-dev/node-jscs).
  19706. */
  19707. laxbreak : true,
  19708. /**
  19709. * This option suppresses warnings about comma-first coding style:
  19710. *
  19711. * var obj = {
  19712. * name: 'Anton'
  19713. * , handle: 'valueof'
  19714. * , role: 'SW Engineer'
  19715. * };
  19716. *
  19717. * @deprecated JSHint is limiting its scope to issues of code correctness.
  19718. * If you would like to enforce rules relating to code style,
  19719. * check out [the JSCS
  19720. * project](https://github.com/jscs-dev/node-jscs).
  19721. */
  19722. laxcomma : true,
  19723. /**
  19724. * This option suppresses warnings about possible strict violations when
  19725. * the code is running in strict mode and you use `this` in a
  19726. * non-constructor function. You should use this option—in a function scope
  19727. * only—when you are positive that your use of `this` is valid in the
  19728. * strict mode (for example, if you call your function using
  19729. * `Function.call`).
  19730. *
  19731. * **Note:** This option can be used only inside of a function scope.
  19732. * JSHint will fail with an error if you will try to set this option
  19733. * globally.
  19734. */
  19735. validthis : true,
  19736. /**
  19737. * This option suppresses warnings about the use of the `with` statement.
  19738. * The semantics of the `with` statement can cause confusion among
  19739. * developers and accidental definition of global variables.
  19740. *
  19741. * More info:
  19742. *
  19743. * * [with Statement Considered
  19744. * Harmful](http://yuiblog.com/blog/2006/04/11/with-statement-considered-harmful/)
  19745. */
  19746. withstmt : true,
  19747. /**
  19748. * This options tells JSHint that your code uses Mozilla JavaScript
  19749. * extensions. Unless you develop specifically for the Firefox web browser
  19750. * you don't need this option.
  19751. *
  19752. * More info:
  19753. *
  19754. * * [New in JavaScript
  19755. * 1.7](https://developer.mozilla.org/en-US/docs/JavaScript/New_in_JavaScript/1.7)
  19756. */
  19757. moz : true,
  19758. /**
  19759. * This option suppresses warnings about generator functions with no
  19760. * `yield` statement in them.
  19761. */
  19762. noyield : true,
  19763. /**
  19764. * This option suppresses warnings about `== null` comparisons. Such
  19765. * comparisons are often useful when you want to check if a variable is
  19766. * `null` or `undefined`.
  19767. */
  19768. eqnull : true,
  19769. /**
  19770. * This option suppresses warnings about missing semicolons, but only when
  19771. * the semicolon is omitted for the last statement in a one-line block:
  19772. *
  19773. * var name = (function() { return 'Anton' }());
  19774. *
  19775. * This is a very niche use case that is useful only when you use automatic
  19776. * JavaScript code generators.
  19777. */
  19778. lastsemic : true,
  19779. /**
  19780. * This option suppresses warnings about functions inside of loops.
  19781. * Defining functions inside of loops can lead to bugs such as this one:
  19782. *
  19783. * var nums = [];
  19784. *
  19785. * for (var i = 0; i < 10; i++) {
  19786. * nums[i] = function (j) {
  19787. * return i + j;
  19788. * };
  19789. * }
  19790. *
  19791. * nums[0](2); // Prints 12 instead of 2
  19792. *
  19793. * To fix the code above you need to copy the value of `i`:
  19794. *
  19795. * var nums = [];
  19796. *
  19797. * for (var i = 0; i < 10; i++) {
  19798. * (function (i) {
  19799. * nums[i] = function (j) {
  19800. * return i + j;
  19801. * };
  19802. * }(i));
  19803. * }
  19804. */
  19805. loopfunc : true,
  19806. /**
  19807. * This option suppresses warnings about the use of expressions where
  19808. * normally you would expect to see assignments or function calls. Most of
  19809. * the time, such code is a typo. However, it is not forbidden by the spec
  19810. * and that's why this warning is optional.
  19811. */
  19812. expr : true,
  19813. /**
  19814. * This option tells JSHint that your code uses ECMAScript 6 specific
  19815. * syntax. Note that not all browsers implement these features.
  19816. *
  19817. * More info:
  19818. *
  19819. * * [Specification for ECMAScript
  19820. * 6](http://www.ecma-international.org/ecma-262/6.0/index.html)
  19821. *
  19822. * @deprecated Use `esversion: 6` instead.
  19823. */
  19824. esnext : true,
  19825. /**
  19826. * This option tells JSHint that your code uses ES3 array elision elements,
  19827. * or empty elements (for example, `[1, , , 4, , , 7]`).
  19828. */
  19829. elision : true,
  19830. },
  19831. // Third party globals
  19832. environments: {
  19833. /**
  19834. * This option defines globals exposed by the
  19835. * [MooTools](http://mootools.net/) JavaScript framework.
  19836. */
  19837. mootools : true,
  19838. /**
  19839. * This option defines globals exposed by
  19840. * [CouchDB](http://couchdb.apache.org/). CouchDB is a document-oriented
  19841. * database that can be queried and indexed in a MapReduce fashion using
  19842. * JavaScript.
  19843. */
  19844. couch : true,
  19845. /**
  19846. * This option defines globals exposed by [the Jasmine unit testing
  19847. * framework](https://jasmine.github.io/).
  19848. */
  19849. jasmine : true,
  19850. /**
  19851. * This option defines globals exposed by the [jQuery](http://jquery.com/)
  19852. * JavaScript library.
  19853. */
  19854. jquery : true,
  19855. /**
  19856. * This option defines globals available when your code is running inside
  19857. * of the Node runtime environment. [Node.js](http://nodejs.org/) is a
  19858. * server-side JavaScript environment that uses an asynchronous
  19859. * event-driven model. This option also skips some warnings that make sense
  19860. * in the browser environments but don't make sense in Node such as
  19861. * file-level `use strict` pragmas and `console.log` statements.
  19862. */
  19863. node : true,
  19864. /**
  19865. * This option defines globals exposed by [the QUnit unit testing
  19866. * framework](http://qunitjs.com/).
  19867. */
  19868. qunit : true,
  19869. /**
  19870. * This option defines globals available when your code is running inside
  19871. * of the Rhino runtime environment. [Rhino](http://www.mozilla.org/rhino/)
  19872. * is an open-source implementation of JavaScript written entirely in Java.
  19873. */
  19874. rhino : true,
  19875. /**
  19876. * This option defines globals exposed by [the ShellJS
  19877. * library](http://documentup.com/arturadib/shelljs).
  19878. */
  19879. shelljs : true,
  19880. /**
  19881. * This option defines globals exposed by the
  19882. * [Prototype](http://www.prototypejs.org/) JavaScript framework.
  19883. */
  19884. prototypejs : true,
  19885. /**
  19886. * This option defines globals exposed by the [YUI](http://yuilibrary.com/)
  19887. * JavaScript framework.
  19888. */
  19889. yui : true,
  19890. /**
  19891. * This option defines globals exposed by the "BDD" and "TDD" UIs of the
  19892. * [Mocha unit testing framework](http://mochajs.org/).
  19893. */
  19894. mocha : true,
  19895. /**
  19896. * This option informs JSHint that the input code describes an ECMAScript 6
  19897. * module. All module code is interpreted as strict mode code.
  19898. */
  19899. module : true,
  19900. /**
  19901. * This option defines globals available when your code is running as a
  19902. * script for the [Windows Script
  19903. * Host](http://en.wikipedia.org/wiki/Windows_Script_Host).
  19904. */
  19905. wsh : true,
  19906. /**
  19907. * This option defines globals available when your code is running inside
  19908. * of a Web Worker. [Web
  19909. * Workers](https://developer.mozilla.org/en/Using_web_workers) provide a
  19910. * simple means for web content to run scripts in background threads.
  19911. */
  19912. worker : true,
  19913. /**
  19914. * This option defines non-standard but widely adopted globals such as
  19915. * `escape` and `unescape`.
  19916. */
  19917. nonstandard : true,
  19918. /**
  19919. * This option defines globals exposed by modern browsers: all the way from
  19920. * good old `document` and `navigator` to the HTML5 `FileReader` and other
  19921. * new developments in the browser world.
  19922. *
  19923. * **Note:** This option doesn't expose variables like `alert` or
  19924. * `console`. See option `devel` for more information.
  19925. */
  19926. browser : true,
  19927. /**
  19928. * This option defines globals available when using [the Browserify
  19929. * tool](http://browserify.org/) to build a project.
  19930. */
  19931. browserify : true,
  19932. /**
  19933. * This option defines globals that are usually used for logging poor-man's
  19934. * debugging: `console`, `alert`, etc. It is usually a good idea to not
  19935. * ship them in production because, for example, `console.log` breaks in
  19936. * legacy versions of Internet Explorer.
  19937. */
  19938. devel : true,
  19939. /**
  19940. * This option defines globals exposed by the [Dojo
  19941. * Toolkit](http://dojotoolkit.org/).
  19942. */
  19943. dojo : true,
  19944. /**
  19945. * This option defines globals for typed array constructors.
  19946. *
  19947. * More info:
  19948. *
  19949. * * [JavaScript typed
  19950. * arrays](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Typed_arrays)
  19951. */
  19952. typed : true,
  19953. /**
  19954. * This option defines globals available when your core is running inside
  19955. * of the PhantomJS runtime environment. [PhantomJS](http://phantomjs.org/)
  19956. * is a headless WebKit scriptable with a JavaScript API. It has fast and
  19957. * native support for various web standards: DOM handling, CSS selector,
  19958. * JSON, Canvas, and SVG.
  19959. */
  19960. phantom : true
  19961. },
  19962. // Obsolete options
  19963. obsolete: {
  19964. onecase : true, // if one case switch statements should be allowed
  19965. regexp : true, // if the . should not be allowed in regexp literals
  19966. regexdash : true // if unescaped first/last dash (-) inside brackets
  19967. // should be tolerated
  19968. }
  19969. };
  19970. // These are the JSHint options that can take any value
  19971. // (we use this object to detect invalid options)
  19972. exports.val = {
  19973. /**
  19974. * This option lets you set the maximum length of a line.
  19975. *
  19976. * @deprecated JSHint is limiting its scope to issues of code correctness. If
  19977. * you would like to enforce rules relating to code style, check
  19978. * out [the JSCS project](https://github.com/jscs-dev/node-jscs).
  19979. */
  19980. maxlen : false,
  19981. /**
  19982. * This option sets a specific tab width for your code.
  19983. *
  19984. * @deprecated JSHint is limiting its scope to issues of code correctness. If
  19985. * you would like to enforce rules relating to code style, check
  19986. * out [the JSCS project](https://github.com/jscs-dev/node-jscs).
  19987. */
  19988. indent : false,
  19989. /**
  19990. * This options allows you to set the maximum amount of warnings JSHint will
  19991. * produce before giving up. Default is 50.
  19992. */
  19993. maxerr : false,
  19994. /**
  19995. * This option allows you to control which variables JSHint considers to be
  19996. * implicitly defined in the environment. Configure it with an array of
  19997. * string values. Prefixing a variable name with a hyphen (-) character will
  19998. * remove that name from the collection of predefined variables.
  19999. *
  20000. * JSHint will consider variables declared in this way to be read-only.
  20001. *
  20002. * This option cannot be specified in-line; it may only be used via the
  20003. * JavaScript API or from an external configuration file.
  20004. */
  20005. predef : false,
  20006. /**
  20007. * This option can be used to specify a white list of global variables that
  20008. * are not formally defined in the source code. This is most useful when
  20009. * combined with the `undef` option in order to suppress warnings for
  20010. * project-specific global variables.
  20011. *
  20012. * Setting an entry to `true` enables reading and writing to that variable.
  20013. * Setting it to `false` will trigger JSHint to consider that variable
  20014. * read-only.
  20015. *
  20016. * See also the "environment" options: a set of options to be used as short
  20017. * hand for enabling global variables defined in common JavaScript
  20018. * environments.
  20019. *
  20020. * To configure `globals` within an individual file, see [Inline
  20021. * Configuration](http://jshint.com/docs/#inline-configuration).
  20022. */
  20023. globals : false,
  20024. /**
  20025. * This option enforces the consistency of quotation marks used throughout
  20026. * your code. It accepts three values: `true` if you don't want to enforce
  20027. * one particular style but want some consistency, `"single"` if you want to
  20028. * allow only single quotes and `"double"` if you want to allow only double
  20029. * quotes.
  20030. *
  20031. * @deprecated JSHint is limiting its scope to issues of code correctness. If
  20032. * you would like to enforce rules relating to code style, check
  20033. * out [the JSCS project](https://github.com/jscs-dev/node-jscs).
  20034. */
  20035. quotmark : false,
  20036. scope : false,
  20037. /**
  20038. * This option lets you set the max number of statements allowed per function:
  20039. *
  20040. * // jshint maxstatements:4
  20041. *
  20042. * function main() {
  20043. * var i = 0;
  20044. * var j = 0;
  20045. *
  20046. * // Function declarations count as one statement. Their bodies
  20047. * // don't get taken into account for the outer function.
  20048. * function inner() {
  20049. * var i2 = 1;
  20050. * var j2 = 1;
  20051. *
  20052. * return i2 + j2;
  20053. * }
  20054. *
  20055. * j = i + j;
  20056. * return j; // JSHint: Too many statements per function. (5)
  20057. * }
  20058. */
  20059. maxstatements: false,
  20060. /**
  20061. * This option lets you control how nested do you want your blocks to be:
  20062. *
  20063. * // jshint maxdepth:2
  20064. *
  20065. * function main(meaning) {
  20066. * var day = true;
  20067. *
  20068. * if (meaning === 42) {
  20069. * while (day) {
  20070. * shuffle();
  20071. *
  20072. * if (tired) { // JSHint: Blocks are nested too deeply (3).
  20073. * sleep();
  20074. * }
  20075. * }
  20076. * }
  20077. * }
  20078. */
  20079. maxdepth : false,
  20080. /**
  20081. * This option lets you set the max number of formal parameters allowed per
  20082. * function:
  20083. *
  20084. * // jshint maxparams:3
  20085. *
  20086. * function login(request, onSuccess) {
  20087. * // ...
  20088. * }
  20089. *
  20090. * // JSHint: Too many parameters per function (4).
  20091. * function logout(request, isManual, whereAmI, onSuccess) {
  20092. * // ...
  20093. * }
  20094. */
  20095. maxparams : false,
  20096. /**
  20097. * This option lets you control cyclomatic complexity throughout your code.
  20098. * Cyclomatic complexity measures the number of linearly independent paths
  20099. * through a program's source code. Read more about [cyclomatic complexity on
  20100. * Wikipedia](http://en.wikipedia.org/wiki/Cyclomatic_complexity).
  20101. */
  20102. maxcomplexity: false,
  20103. /**
  20104. * This option suppresses warnings about variable shadowing i.e. declaring a
  20105. * variable that had been already declared somewhere in the outer scope.
  20106. *
  20107. * - "inner" - check for variables defined in the same scope only
  20108. * - "outer" - check for variables defined in outer scopes as well
  20109. * - false - same as inner
  20110. * - true - allow variable shadowing
  20111. */
  20112. shadow : false,
  20113. /**
  20114. * This option requires the code to run in ECMAScript 5's strict mode.
  20115. * [Strict mode](https://developer.mozilla.org/en/JavaScript/Strict_mode)
  20116. * is a way to opt in to a restricted variant of JavaScript. Strict mode
  20117. * eliminates some JavaScript pitfalls that didn't cause errors by changing
  20118. * them to produce errors. It also fixes mistakes that made it difficult
  20119. * for the JavaScript engines to perform certain optimizations.
  20120. *
  20121. * - "global" - there must be a `"use strict";` directive at global level
  20122. * - "implied" - lint the code as if there is the `"use strict";` directive
  20123. * - false - disable warnings about strict mode
  20124. * - true - there must be a `"use strict";` directive at function level;
  20125. * this is preferable for scripts intended to be loaded in web
  20126. * browsers directly because enabling strict mode globally
  20127. * could adversely effect other scripts running on the same
  20128. * page
  20129. */
  20130. strict : true,
  20131. /**
  20132. * This option warns when you define and never use your variables. It is very
  20133. * useful for general code cleanup, especially when used in addition to
  20134. * `undef`.
  20135. *
  20136. * // jshint unused:true
  20137. *
  20138. * function test(a, b) {
  20139. * var c, d = 2;
  20140. *
  20141. * return a + d;
  20142. * }
  20143. *
  20144. * test(1, 2);
  20145. *
  20146. * // Line 3: 'b' was defined but never used.
  20147. * // Line 4: 'c' was defined but never used.
  20148. *
  20149. * In addition to that, this option will warn you about unused global
  20150. * variables declared via the `global` directive.
  20151. *
  20152. * When set to `true`, unused parameters that are followed by a used
  20153. * parameter will not produce warnings. This option can be set to `vars` to
  20154. * only check for variables, not function parameters, or `strict` to check
  20155. * all variables and parameters.
  20156. */
  20157. unused : true,
  20158. /**
  20159. * This option prohibits the use of a variable before it was defined.
  20160. * JavaScript has function scope only and, in addition to that, all variables
  20161. * are always moved—or hoisted— to the top of the function. This behavior can
  20162. * lead to some very nasty bugs and that's why it is safer to always use
  20163. * variable only after they have been explicitly defined.
  20164. *
  20165. * Setting this option to "nofunc" will allow function declarations to be
  20166. * ignored.
  20167. *
  20168. * For more in-depth understanding of scoping and hoisting in JavaScript,
  20169. * read [JavaScript Scoping and
  20170. * Hoisting](http://www.adequatelygood.com/2010/2/JavaScript-Scoping-and-Hoisting)
  20171. * by Ben Cherry.
  20172. */
  20173. latedef : false,
  20174. ignore : false, // start/end ignoring lines of code, bypassing the lexer
  20175. // start - start ignoring lines, including the current line
  20176. // end - stop ignoring lines, starting on the next line
  20177. // line - ignore warnings / errors for just a single line
  20178. // (this option does not bypass the lexer)
  20179. ignoreDelimiters: false, // array of start/end delimiters used to ignore
  20180. // certain chunks from code
  20181. /**
  20182. * This option is used to specify the ECMAScript version to which the code
  20183. * must adhere. It can assume one of the following values:
  20184. * - `3` - If you need your program to be executable
  20185. * in older browsers—such as Internet Explorer 6/7/8/9—and other legacy
  20186. * JavaScript environments
  20187. * - `5` - To enable syntax first defined in [the ECMAScript 5.1
  20188. * specification](http://www.ecma-international.org/ecma-262/5.1/index.html).
  20189. * This includes allowing reserved keywords as object properties.
  20190. * - `6` - To tell JSHint that your code uses [ECMAScript
  20191. * 6](http://www.ecma-international.org/ecma-262/6.0/index.html) specific
  20192. * syntax. Note that not all browsers implement them.
  20193. */
  20194. esversion: 5
  20195. };
  20196. // These are JSHint boolean options which are shared with JSLint
  20197. // where the definition in JSHint is opposite JSLint
  20198. exports.inverted = {
  20199. bitwise : true,
  20200. forin : true,
  20201. newcap : true,
  20202. plusplus: true,
  20203. regexp : true,
  20204. undef : true,
  20205. // Inverted and renamed, use JSHint name here
  20206. eqeqeq : true,
  20207. strict : true
  20208. };
  20209. exports.validNames = Object.keys(exports.val)
  20210. .concat(Object.keys(exports.bool.relaxing))
  20211. .concat(Object.keys(exports.bool.enforcing))
  20212. .concat(Object.keys(exports.bool.obsolete))
  20213. .concat(Object.keys(exports.bool.environments));
  20214. // These are JSHint boolean options which are shared with JSLint
  20215. // where the name has been changed but the effect is unchanged
  20216. exports.renamed = {
  20217. eqeq : "eqeqeq",
  20218. windows: "wsh",
  20219. sloppy : "strict"
  20220. };
  20221. exports.removed = {
  20222. nomen: true,
  20223. onevar: true,
  20224. passfail: true,
  20225. white: true,
  20226. gcl: true,
  20227. smarttabs: true,
  20228. trailing: true
  20229. };
  20230. // Add options here which should not be automatically enforced by
  20231. // `enforceall`.
  20232. exports.noenforceall = {
  20233. varstmt: true,
  20234. strict: true
  20235. };
  20236. },{}],18:[function(require,module,exports){
  20237. /*
  20238. * Regular expressions. Some of these are stupidly long.
  20239. */
  20240. /*jshint maxlen:1000 */
  20241. "use strict";
  20242. // Unsafe comment or string (ax)
  20243. exports.unsafeString =
  20244. /@cc|<\/?|script|\]\s*\]|<\s*!|&lt/i;
  20245. // Characters in strings that need escaping (nx and nxg)
  20246. exports.needEsc =
  20247. /[\u0000-\u001f&<"\/\\\u007f-\u009f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/;
  20248. exports.needEscGlobal =
  20249. /[\u0000-\u001f&<"\/\\\u007f-\u009f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g;
  20250. // Star slash (lx)
  20251. exports.starSlash = /\*\//;
  20252. // Identifier (ix)
  20253. exports.identifier = /^([a-zA-Z_$][a-zA-Z0-9_$]*)$/;
  20254. // JavaScript URL (jx)
  20255. exports.javascriptURL = /^(?:javascript|jscript|ecmascript|vbscript|livescript)\s*:/i;
  20256. // Catches /* falls through */ comments (ft)
  20257. exports.fallsThrough = /^\s*falls?\sthrough\s*$/;
  20258. // very conservative rule (eg: only one space between the start of the comment and the first character)
  20259. // to relax the maxlen option
  20260. exports.maxlenException = /^(?:(?:\/\/|\/\*|\*) ?)?[^ ]+$/;
  20261. // Node.js releases prior to version 8 include a version of the V8 engine which
  20262. // incorrectly interprets the character class escape `\s`. The following
  20263. // regular expression may be replaced with `/\s/` when JSHint removes support
  20264. // for Node.js versions prior to 8.
  20265. // Source:
  20266. // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp
  20267. exports.whitespace = /[ \f\n\r\t\v\u00a0\u1680\u2000-\u200a\u2028\u2029\u202f\u205f\u3000\ufeff]/;
  20268. },{}],19:[function(require,module,exports){
  20269. "use strict";
  20270. var _ = require("lodash");
  20271. var events = require("events");
  20272. // Used to denote membership in lookup tables (a primitive value such as `true`
  20273. // would be silently rejected for the property name "__proto__" in some
  20274. // environments)
  20275. var marker = {};
  20276. /**
  20277. * Creates a scope manager that handles variables and labels, storing usages
  20278. * and resolving when variables are used and undefined
  20279. */
  20280. var scopeManager = function(state, predefined, exported, declared) {
  20281. var _current;
  20282. var _scopeStack = [];
  20283. function _newScope(type) {
  20284. _current = {
  20285. "(labels)": Object.create(null),
  20286. "(usages)": Object.create(null),
  20287. "(breakLabels)": Object.create(null),
  20288. "(parent)": _current,
  20289. "(type)": type,
  20290. "(params)": (type === "functionparams" || type === "catchparams") ? [] : null
  20291. };
  20292. _scopeStack.push(_current);
  20293. }
  20294. _newScope("global");
  20295. _current["(predefined)"] = predefined;
  20296. var _currentFunctBody = _current; // this is the block after the params = function
  20297. var usedPredefinedAndGlobals = Object.create(null);
  20298. var impliedGlobals = Object.create(null);
  20299. var unuseds = [];
  20300. var emitter = new events.EventEmitter();
  20301. function warning(code, token) {
  20302. emitter.emit("warning", {
  20303. code: code,
  20304. token: token,
  20305. data: _.slice(arguments, 2)
  20306. });
  20307. }
  20308. function error(code, token) {
  20309. emitter.emit("warning", {
  20310. code: code,
  20311. token: token,
  20312. data: _.slice(arguments, 2)
  20313. });
  20314. }
  20315. function _setupUsages(labelName) {
  20316. if (!_current["(usages)"][labelName]) {
  20317. _current["(usages)"][labelName] = {
  20318. "(modified)": [],
  20319. "(reassigned)": [],
  20320. "(tokens)": []
  20321. };
  20322. }
  20323. }
  20324. var _getUnusedOption = function(unused_opt) {
  20325. if (unused_opt === undefined) {
  20326. unused_opt = state.option.unused;
  20327. }
  20328. if (unused_opt === true) {
  20329. unused_opt = "last-param";
  20330. }
  20331. return unused_opt;
  20332. };
  20333. var _warnUnused = function(name, tkn, type, unused_opt) {
  20334. var line = tkn.line;
  20335. var chr = tkn.from;
  20336. var raw_name = tkn.raw_text || name;
  20337. unused_opt = _getUnusedOption(unused_opt);
  20338. var warnable_types = {
  20339. "vars": ["var"],
  20340. "last-param": ["var", "param"],
  20341. "strict": ["var", "param", "last-param"]
  20342. };
  20343. if (unused_opt) {
  20344. if (warnable_types[unused_opt] && warnable_types[unused_opt].indexOf(type) !== -1) {
  20345. warning("W098", { line: line, from: chr }, raw_name);
  20346. }
  20347. }
  20348. // inconsistent - see gh-1894
  20349. if (unused_opt || type === "var") {
  20350. unuseds.push({
  20351. name: name,
  20352. line: line,
  20353. character: chr
  20354. });
  20355. }
  20356. };
  20357. /**
  20358. * Checks the current scope for unused identifiers
  20359. */
  20360. function _checkForUnused() {
  20361. // function params are handled specially
  20362. // assume that parameters are the only thing declared in the param scope
  20363. if (_current["(type)"] === "functionparams") {
  20364. _checkParams();
  20365. return;
  20366. }
  20367. var curentLabels = _current["(labels)"];
  20368. for (var labelName in curentLabels) {
  20369. if (curentLabels[labelName]["(type)"] !== "exception" &&
  20370. curentLabels[labelName]["(unused)"]) {
  20371. _warnUnused(labelName, curentLabels[labelName]["(token)"], "var");
  20372. }
  20373. }
  20374. }
  20375. /**
  20376. * Checks the current scope for unused parameters
  20377. * Must be called in a function parameter scope
  20378. */
  20379. function _checkParams() {
  20380. var params = _current["(params)"];
  20381. if (!params) {
  20382. return;
  20383. }
  20384. var param = params.pop();
  20385. var unused_opt;
  20386. while (param) {
  20387. var label = _current["(labels)"][param];
  20388. unused_opt = _getUnusedOption(state.funct["(unusedOption)"]);
  20389. // 'undefined' is a special case for (function(window, undefined) { ... })();
  20390. // patterns.
  20391. if (param === "undefined")
  20392. return;
  20393. if (label["(unused)"]) {
  20394. _warnUnused(param, label["(token)"], "param", state.funct["(unusedOption)"]);
  20395. } else if (unused_opt === "last-param") {
  20396. return;
  20397. }
  20398. param = params.pop();
  20399. }
  20400. }
  20401. /**
  20402. * Finds the relevant label's scope, searching from nearest outwards
  20403. * @returns {Object} the scope the label was found in
  20404. */
  20405. function _getLabel(labelName) {
  20406. for (var i = _scopeStack.length - 1 ; i >= 0; --i) {
  20407. var scopeLabels = _scopeStack[i]["(labels)"];
  20408. if (scopeLabels[labelName]) {
  20409. return scopeLabels;
  20410. }
  20411. }
  20412. }
  20413. function usedSoFarInCurrentFunction(labelName) {
  20414. // used so far in this whole function and any sub functions
  20415. for (var i = _scopeStack.length - 1; i >= 0; i--) {
  20416. var current = _scopeStack[i];
  20417. if (current["(usages)"][labelName]) {
  20418. return current["(usages)"][labelName];
  20419. }
  20420. if (current === _currentFunctBody) {
  20421. break;
  20422. }
  20423. }
  20424. return false;
  20425. }
  20426. function _checkOuterShadow(labelName, token) {
  20427. // only check if shadow is outer
  20428. if (state.option.shadow !== "outer") {
  20429. return;
  20430. }
  20431. var isGlobal = _currentFunctBody["(type)"] === "global",
  20432. isNewFunction = _current["(type)"] === "functionparams";
  20433. var outsideCurrentFunction = !isGlobal;
  20434. for (var i = 0; i < _scopeStack.length; i++) {
  20435. var stackItem = _scopeStack[i];
  20436. if (!isNewFunction && _scopeStack[i + 1] === _currentFunctBody) {
  20437. outsideCurrentFunction = false;
  20438. }
  20439. if (outsideCurrentFunction && stackItem["(labels)"][labelName]) {
  20440. warning("W123", token, labelName);
  20441. }
  20442. if (stackItem["(breakLabels)"][labelName]) {
  20443. warning("W123", token, labelName);
  20444. }
  20445. }
  20446. }
  20447. function _latedefWarning(type, labelName, token) {
  20448. var isFunction;
  20449. if (state.option.latedef) {
  20450. isFunction = type === "function" || type === "generator function";
  20451. // if either latedef is strict and this is a function
  20452. // or this is not a function
  20453. if ((state.option.latedef === true && isFunction) || !isFunction) {
  20454. warning("W003", token, labelName);
  20455. }
  20456. }
  20457. }
  20458. var scopeManagerInst = {
  20459. on: function(names, listener) {
  20460. names.split(" ").forEach(function(name) {
  20461. emitter.on(name, listener);
  20462. });
  20463. },
  20464. isPredefined: function(labelName) {
  20465. return !this.has(labelName) && _.has(_scopeStack[0]["(predefined)"], labelName);
  20466. },
  20467. /**
  20468. * Tell the manager we are entering a new block of code
  20469. * @param {string} [type] - The type of the block. Valid values are
  20470. * "functionparams", "catchparams" and
  20471. * "functionouter"
  20472. */
  20473. stack: function(type) {
  20474. var previousScope = _current;
  20475. _newScope(type);
  20476. if (!type && previousScope["(type)"] === "functionparams") {
  20477. _current["(isFuncBody)"] = true;
  20478. _currentFunctBody = _current;
  20479. }
  20480. },
  20481. unstack: function() {
  20482. // jshint proto: true
  20483. var subScope = _scopeStack.length > 1 ? _scopeStack[_scopeStack.length - 2] : null;
  20484. var isUnstackingFunctionBody = _current === _currentFunctBody,
  20485. isUnstackingFunctionParams = _current["(type)"] === "functionparams",
  20486. isUnstackingFunctionOuter = _current["(type)"] === "functionouter";
  20487. var i, j, isImmutable;
  20488. var currentUsages = _current["(usages)"];
  20489. var currentLabels = _current["(labels)"];
  20490. var usedLabelNameList = Object.keys(currentUsages);
  20491. /* istanbul ignore if */
  20492. if (currentUsages.__proto__ && usedLabelNameList.indexOf("__proto__") === -1) {
  20493. usedLabelNameList.push("__proto__");
  20494. }
  20495. for (i = 0; i < usedLabelNameList.length; i++) {
  20496. var usedLabelName = usedLabelNameList[i];
  20497. var usage = currentUsages[usedLabelName];
  20498. var usedLabel = currentLabels[usedLabelName];
  20499. if (usedLabel) {
  20500. var usedLabelType = usedLabel["(type)"];
  20501. isImmutable = usedLabelType === "const" || usedLabelType === "import";
  20502. if (usedLabel["(useOutsideOfScope)"] && !state.option.funcscope) {
  20503. var usedTokens = usage["(tokens)"];
  20504. for (j = 0; j < usedTokens.length; j++) {
  20505. // Keep the consistency of https://github.com/jshint/jshint/issues/2409
  20506. if (usedLabel["(function)"] === usedTokens[j]["(function)"]) {
  20507. error("W038", usedTokens[j], usedLabelName);
  20508. }
  20509. }
  20510. }
  20511. // mark the label used
  20512. _current["(labels)"][usedLabelName]["(unused)"] = false;
  20513. // check for modifying a const
  20514. if (isImmutable && usage["(modified)"]) {
  20515. for (j = 0; j < usage["(modified)"].length; j++) {
  20516. error("E013", usage["(modified)"][j], usedLabelName);
  20517. }
  20518. }
  20519. // check for re-assigning a function declaration
  20520. if ((usedLabelType === "function" || usedLabelType === "generator function" ||
  20521. usedLabelType === "class") && usage["(reassigned)"]) {
  20522. for (j = 0; j < usage["(reassigned)"].length; j++) {
  20523. if (!usage["(reassigned)"][j].ignoreW021) {
  20524. warning("W021", usage["(reassigned)"][j], usedLabelName, usedLabelType);
  20525. }
  20526. }
  20527. }
  20528. continue;
  20529. }
  20530. if (subScope) {
  20531. var labelType = this.labeltype(usedLabelName);
  20532. isImmutable = labelType === "const" ||
  20533. (labelType === null && _scopeStack[0]["(predefined)"][usedLabelName] === false);
  20534. if (isUnstackingFunctionOuter && !isImmutable) {
  20535. if (!state.funct["(outerMutables)"]) {
  20536. state.funct["(outerMutables)"] = [];
  20537. }
  20538. state.funct["(outerMutables)"].push(usedLabelName);
  20539. }
  20540. // not exiting the global scope, so copy the usage down in case its an out of scope usage
  20541. if (!subScope["(usages)"][usedLabelName]) {
  20542. subScope["(usages)"][usedLabelName] = usage;
  20543. if (isUnstackingFunctionBody) {
  20544. subScope["(usages)"][usedLabelName]["(onlyUsedSubFunction)"] = true;
  20545. }
  20546. } else {
  20547. var subScopeUsage = subScope["(usages)"][usedLabelName];
  20548. subScopeUsage["(modified)"] = subScopeUsage["(modified)"].concat(usage["(modified)"]);
  20549. subScopeUsage["(tokens)"] = subScopeUsage["(tokens)"].concat(usage["(tokens)"]);
  20550. subScopeUsage["(reassigned)"] =
  20551. subScopeUsage["(reassigned)"].concat(usage["(reassigned)"]);
  20552. }
  20553. } else {
  20554. // this is exiting global scope, so we finalise everything here - we are at the end of the file
  20555. if (typeof _current["(predefined)"][usedLabelName] === "boolean") {
  20556. // remove the declared token, so we know it is used
  20557. delete declared[usedLabelName];
  20558. // note it as used so it can be reported
  20559. usedPredefinedAndGlobals[usedLabelName] = marker;
  20560. // check for re-assigning a read-only (set to false) predefined
  20561. if (_current["(predefined)"][usedLabelName] === false && usage["(reassigned)"]) {
  20562. for (j = 0; j < usage["(reassigned)"].length; j++) {
  20563. if (!usage["(reassigned)"][j].ignoreW020) {
  20564. warning("W020", usage["(reassigned)"][j]);
  20565. }
  20566. }
  20567. }
  20568. }
  20569. else {
  20570. // label usage is not predefined and we have not found a declaration
  20571. // so report as undeclared
  20572. for (j = 0; j < usage["(tokens)"].length; j++) {
  20573. var undefinedToken = usage["(tokens)"][j];
  20574. // if its not a forgiven undefined (e.g. typof x)
  20575. if (!undefinedToken.forgiveUndef) {
  20576. // if undef is on and undef was on when the token was defined
  20577. if (state.option.undef && !undefinedToken.ignoreUndef) {
  20578. warning("W117", undefinedToken, usedLabelName);
  20579. }
  20580. if (impliedGlobals[usedLabelName]) {
  20581. impliedGlobals[usedLabelName].line.push(undefinedToken.line);
  20582. } else {
  20583. impliedGlobals[usedLabelName] = {
  20584. name: usedLabelName,
  20585. line: [undefinedToken.line]
  20586. };
  20587. }
  20588. }
  20589. }
  20590. }
  20591. }
  20592. }
  20593. // if exiting the global scope, we can warn about declared globals that haven't been used yet
  20594. if (!subScope) {
  20595. Object.keys(declared)
  20596. .forEach(function(labelNotUsed) {
  20597. _warnUnused(labelNotUsed, declared[labelNotUsed], "var");
  20598. });
  20599. }
  20600. // If this is not a function boundary, transfer function-scoped labels to
  20601. // the parent block (a rough simulation of variable hoisting). Previously
  20602. // existing labels in the parent block should take precedence so that things and stuff.
  20603. if (subScope && !isUnstackingFunctionBody &&
  20604. !isUnstackingFunctionParams && !isUnstackingFunctionOuter) {
  20605. var labelNames = Object.keys(currentLabels);
  20606. for (i = 0; i < labelNames.length; i++) {
  20607. var defLabelName = labelNames[i];
  20608. var defLabel = currentLabels[defLabelName];
  20609. if (!defLabel["(blockscoped)"] && defLabel["(type)"] !== "exception") {
  20610. var shadowed = subScope["(labels)"][defLabelName];
  20611. // Do not overwrite a label if it exists in the parent scope
  20612. // because it is shared by adjacent blocks. Copy the `unused`
  20613. // property so that any references found within the current block
  20614. // are counted toward that higher-level declaration.
  20615. if (shadowed) {
  20616. shadowed["(unused)"] &= defLabel["(unused)"];
  20617. // "Hoist" the variable to the parent block, decorating the label
  20618. // so that future references, though technically valid, can be
  20619. // reported as "out-of-scope" in the absence of the `funcscope`
  20620. // option.
  20621. } else {
  20622. defLabel["(useOutsideOfScope)"] =
  20623. // Do not warn about out-of-scope usages in the global scope
  20624. _currentFunctBody["(type)"] !== "global" &&
  20625. // When a higher scope contains a binding for the label, the
  20626. // label is a re-declaration and should not prompt "used
  20627. // out-of-scope" warnings.
  20628. !this.funct.has(defLabelName, { excludeCurrent: true });
  20629. subScope["(labels)"][defLabelName] = defLabel;
  20630. }
  20631. delete currentLabels[defLabelName];
  20632. }
  20633. }
  20634. }
  20635. _checkForUnused();
  20636. _scopeStack.pop();
  20637. if (isUnstackingFunctionBody) {
  20638. _currentFunctBody = _scopeStack[_.findLastIndex(_scopeStack, function(scope) {
  20639. // if function or if global (which is at the bottom so it will only return true if we call back)
  20640. return scope["(isFuncBody)"] || scope["(type)"] === "global";
  20641. })];
  20642. }
  20643. _current = subScope;
  20644. },
  20645. /**
  20646. * Add a param to the current scope
  20647. * @param {string} labelName
  20648. * @param {Token} token
  20649. * @param {string} [type="param"] param type
  20650. */
  20651. addParam: function(labelName, token, type) {
  20652. type = type || "param";
  20653. if (type === "exception") {
  20654. // if defined in the current function
  20655. var previouslyDefinedLabelType = this.funct.labeltype(labelName);
  20656. if (previouslyDefinedLabelType && previouslyDefinedLabelType !== "exception") {
  20657. // and has not been used yet in the current function scope
  20658. if (!state.option.node) {
  20659. warning("W002", state.tokens.next, labelName);
  20660. }
  20661. }
  20662. if (state.isStrict() && (labelName === "arguments" || labelName === "eval")) {
  20663. warning("E008", token);
  20664. }
  20665. }
  20666. // The variable was declared in the current scope
  20667. if (_.has(_current["(labels)"], labelName)) {
  20668. _current["(labels)"][labelName].duplicated = true;
  20669. // The variable was declared in an outer scope
  20670. } else {
  20671. // if this scope has the variable defined, it's a re-definition error
  20672. _checkOuterShadow(labelName, token);
  20673. _current["(labels)"][labelName] = {
  20674. "(type)" : type,
  20675. "(token)": token,
  20676. "(unused)": true };
  20677. _current["(params)"].push(labelName);
  20678. }
  20679. if (_.has(_current["(usages)"], labelName)) {
  20680. var usage = _current["(usages)"][labelName];
  20681. // if its in a sub function it is not necessarily an error, just latedef
  20682. if (usage["(onlyUsedSubFunction)"]) {
  20683. _latedefWarning(type, labelName, token);
  20684. } else {
  20685. // this is a clear illegal usage for block scoped variables
  20686. warning("E056", token, labelName, type);
  20687. }
  20688. }
  20689. },
  20690. validateParams: function(isArrow) {
  20691. var isStrict = state.isStrict();
  20692. var currentFunctParamScope = _currentFunctBody["(parent)"];
  20693. if (!currentFunctParamScope["(params)"]) {
  20694. return;
  20695. }
  20696. currentFunctParamScope["(params)"].forEach(function(labelName) {
  20697. var label = currentFunctParamScope["(labels)"][labelName];
  20698. if (label.duplicated) {
  20699. if (isStrict || isArrow) {
  20700. warning("E011", label["(token)"], labelName);
  20701. } else if (state.option.shadow !== true) {
  20702. warning("W004", label["(token)"], labelName);
  20703. }
  20704. }
  20705. if (isStrict && (labelName === "arguments" || labelName === "eval")) {
  20706. warning("E008", label["(token)"]);
  20707. }
  20708. });
  20709. },
  20710. getUsedOrDefinedGlobals: function() {
  20711. // jshint proto: true
  20712. var list = Object.keys(usedPredefinedAndGlobals);
  20713. // If `__proto__` is used as a global variable name, its entry in the
  20714. // lookup table may not be enumerated by `Object.keys` (depending on the
  20715. // environment).
  20716. /* istanbul ignore if */
  20717. if (usedPredefinedAndGlobals.__proto__ === marker &&
  20718. list.indexOf("__proto__") === -1) {
  20719. list.push("__proto__");
  20720. }
  20721. return list;
  20722. },
  20723. /**
  20724. * Gets an array of implied globals
  20725. * @returns {Array.<{ name: string, line: Array.<number>}>}
  20726. */
  20727. getImpliedGlobals: function() {
  20728. // jshint proto: true
  20729. var values = _.values(impliedGlobals);
  20730. var hasProto = false;
  20731. // If `__proto__` is an implied global variable, its entry in the lookup
  20732. // table may not be enumerated by `_.values` (depending on the
  20733. // environment).
  20734. if (impliedGlobals.__proto__) {
  20735. hasProto = values.some(function(value) {
  20736. return value.name === "__proto__";
  20737. });
  20738. /* istanbul ignore if */
  20739. if (!hasProto) {
  20740. values.push(impliedGlobals.__proto__);
  20741. }
  20742. }
  20743. return values;
  20744. },
  20745. /**
  20746. * Returns a list of unused variables
  20747. * @returns {Array}
  20748. */
  20749. getUnuseds: function() {
  20750. return unuseds;
  20751. },
  20752. has: function(labelName) {
  20753. return Boolean(_getLabel(labelName));
  20754. },
  20755. labeltype: function(labelName) {
  20756. // returns a labels type or null if not present
  20757. var scopeLabels = _getLabel(labelName);
  20758. if (scopeLabels) {
  20759. return scopeLabels[labelName]["(type)"];
  20760. }
  20761. return null;
  20762. },
  20763. /**
  20764. * for the exported options, indicating a variable is used outside the file
  20765. */
  20766. addExported: function(labelName) {
  20767. var globalLabels = _scopeStack[0]["(labels)"];
  20768. if (_.has(declared, labelName)) {
  20769. // remove the declared token, so we know it is used
  20770. delete declared[labelName];
  20771. } else if (_.has(globalLabels, labelName)) {
  20772. globalLabels[labelName]["(unused)"] = false;
  20773. } else {
  20774. for (var i = 1; i < _scopeStack.length; i++) {
  20775. var scope = _scopeStack[i];
  20776. // if `scope.(type)` is not defined, it is a block scope
  20777. if (!scope["(type)"]) {
  20778. if (_.has(scope["(labels)"], labelName) &&
  20779. !scope["(labels)"][labelName]["(blockscoped)"]) {
  20780. scope["(labels)"][labelName]["(unused)"] = false;
  20781. return;
  20782. }
  20783. } else {
  20784. break;
  20785. }
  20786. }
  20787. exported[labelName] = true;
  20788. }
  20789. },
  20790. /**
  20791. * Mark an indentifier as es6 module exported
  20792. */
  20793. setExported: function(labelName, token) {
  20794. this.block.use(labelName, token);
  20795. },
  20796. initialize: function(labelName) {
  20797. if (_current["(labels)"][labelName]) {
  20798. _current["(labels)"][labelName]["(initialized)"] = true;
  20799. }
  20800. },
  20801. /**
  20802. * adds an indentifier to the relevant current scope and creates warnings/errors as necessary
  20803. * @param {string} labelName
  20804. * @param {Object} opts
  20805. * @param {String} opts.type - the type of the label e.g. "param", "var", "let, "const", "import", "function", "generator function"
  20806. * @param {Token} opts.token - the token pointing at the declaration
  20807. * @param {boolean} opts.initialized - whether the binding should be created in an "initialized" state.
  20808. */
  20809. addlabel: function(labelName, opts) {
  20810. var type = opts.type;
  20811. var token = opts.token;
  20812. var isblockscoped = type === "let" || type === "const" ||
  20813. type === "class" || type === "import" || type === "generator function";
  20814. var ishoisted = type === "function" || type === "generator function" ||
  20815. type === "import";
  20816. var isexported = (isblockscoped ? _current : _currentFunctBody)["(type)"] === "global" &&
  20817. _.has(exported, labelName);
  20818. // outer shadow check (inner is only on non-block scoped)
  20819. _checkOuterShadow(labelName, token);
  20820. if (state.isStrict() && (labelName === "arguments" || labelName === "eval")) {
  20821. warning("E008", token);
  20822. }
  20823. if (isblockscoped) {
  20824. var declaredInCurrentScope = _current["(labels)"][labelName];
  20825. // for block scoped variables, params are seen in the current scope as the root function
  20826. // scope, so check these too.
  20827. if (!declaredInCurrentScope && _current === _currentFunctBody &&
  20828. _current["(type)"] !== "global") {
  20829. declaredInCurrentScope = !!_currentFunctBody["(parent)"]["(labels)"][labelName];
  20830. }
  20831. // if its not already defined (which is an error, so ignore) and is used in TDZ
  20832. if (!declaredInCurrentScope && _current["(usages)"][labelName]) {
  20833. var usage = _current["(usages)"][labelName];
  20834. // if its in a sub function it is not necessarily an error, just latedef
  20835. if (usage["(onlyUsedSubFunction)"] || ishoisted) {
  20836. _latedefWarning(type, labelName, token);
  20837. } else if (!ishoisted) {
  20838. // this is a clear illegal usage for block scoped variables
  20839. warning("E056", token, labelName, type);
  20840. }
  20841. }
  20842. // If this scope has already declared a binding with the same name,
  20843. // then this represents a redeclaration error if:
  20844. //
  20845. // 1. it is a "hoisted" block-scoped binding within a block. For
  20846. // instance: generator functions may be redeclared in the global
  20847. // scope but not within block statements
  20848. // 2. this is not a "hoisted" block-scoped binding
  20849. if (declaredInCurrentScope &&
  20850. (!ishoisted || (_current["(type)"] !== "global" || type === "import"))) {
  20851. warning("E011", token, labelName);
  20852. }
  20853. else if (state.option.shadow === "outer") {
  20854. // if shadow is outer, for block scope we want to detect any shadowing within this function
  20855. if (scopeManagerInst.funct.has(labelName)) {
  20856. warning("W004", token, labelName);
  20857. }
  20858. }
  20859. scopeManagerInst.block.add(
  20860. labelName, type, token, !isexported, opts.initialized
  20861. );
  20862. } else {
  20863. var declaredInCurrentFunctionScope = scopeManagerInst.funct.has(labelName);
  20864. // check for late definition, ignore if already declared
  20865. if (!declaredInCurrentFunctionScope && usedSoFarInCurrentFunction(labelName)) {
  20866. _latedefWarning(type, labelName, token);
  20867. }
  20868. // defining with a var or a function when a block scope variable of the same name
  20869. // is in scope is an error
  20870. if (scopeManagerInst.funct.has(labelName, { onlyBlockscoped: true })) {
  20871. warning("E011", token, labelName);
  20872. } else if (state.option.shadow !== true) {
  20873. // now since we didn't get any block scope variables, test for var/function
  20874. // shadowing
  20875. if (declaredInCurrentFunctionScope && labelName !== "__proto__") {
  20876. // see https://github.com/jshint/jshint/issues/2400
  20877. if (_currentFunctBody["(type)"] !== "global") {
  20878. warning("W004", token, labelName);
  20879. }
  20880. }
  20881. }
  20882. scopeManagerInst.funct.add(labelName, type, token, !isexported);
  20883. if (_currentFunctBody["(type)"] === "global" && !state.impliedClosure()) {
  20884. usedPredefinedAndGlobals[labelName] = marker;
  20885. }
  20886. }
  20887. },
  20888. funct: {
  20889. /**
  20890. * Returns the label type given certain options
  20891. * @param labelName
  20892. * @param {Object=} options
  20893. * @param {Boolean=} options.onlyBlockscoped - only include block scoped labels
  20894. * @param {Boolean=} options.excludeParams - exclude the param scope
  20895. * @param {Boolean=} options.excludeCurrent - exclude the current scope
  20896. * @returns {String}
  20897. */
  20898. labeltype: function(labelName, options) {
  20899. var onlyBlockscoped = options && options.onlyBlockscoped;
  20900. var excludeParams = options && options.excludeParams;
  20901. var currentScopeIndex = _scopeStack.length - (options && options.excludeCurrent ? 2 : 1);
  20902. for (var i = currentScopeIndex; i >= 0; i--) {
  20903. var current = _scopeStack[i];
  20904. if (current["(labels)"][labelName] &&
  20905. (!onlyBlockscoped || current["(labels)"][labelName]["(blockscoped)"])) {
  20906. return current["(labels)"][labelName]["(type)"];
  20907. }
  20908. var scopeCheck = excludeParams ? _scopeStack[ i - 1 ] : current;
  20909. if (scopeCheck && scopeCheck["(type)"] === "functionparams") {
  20910. return null;
  20911. }
  20912. }
  20913. return null;
  20914. },
  20915. /**
  20916. * Returns if a break label exists in the function scope
  20917. * @param {string} labelName
  20918. * @returns {boolean}
  20919. */
  20920. hasBreakLabel: function(labelName) {
  20921. for (var i = _scopeStack.length - 1; i >= 0; i--) {
  20922. var current = _scopeStack[i];
  20923. if (current["(breakLabels)"][labelName]) {
  20924. return true;
  20925. }
  20926. if (current["(type)"] === "functionparams") {
  20927. return false;
  20928. }
  20929. }
  20930. return false;
  20931. },
  20932. /**
  20933. * Returns if the label is in the current function scope
  20934. * See scopeManager.funct.labelType for options
  20935. */
  20936. has: function(labelName, options) {
  20937. return Boolean(this.labeltype(labelName, options));
  20938. },
  20939. /**
  20940. * Adds a new function scoped variable
  20941. * see block.add for block scoped
  20942. */
  20943. add: function(labelName, type, tok, unused) {
  20944. _current["(labels)"][labelName] = {
  20945. "(type)" : type,
  20946. "(token)": tok,
  20947. "(blockscoped)": false,
  20948. "(function)": _currentFunctBody,
  20949. "(unused)": unused };
  20950. }
  20951. },
  20952. block: {
  20953. /**
  20954. * is the current block global?
  20955. * @returns Boolean
  20956. */
  20957. isGlobal: function() {
  20958. return _current["(type)"] === "global";
  20959. },
  20960. use: function(labelName, token) {
  20961. // if resolves to current function params, then do not store usage just resolve
  20962. // this is because function(a) { var a; a = a; } will resolve to the param, not
  20963. // to the unset var
  20964. // first check the param is used
  20965. var paramScope = _currentFunctBody["(parent)"];
  20966. if (paramScope && paramScope["(labels)"][labelName] &&
  20967. paramScope["(labels)"][labelName]["(type)"] === "param") {
  20968. // then check its not declared by a block scope variable
  20969. if (!scopeManagerInst.funct.has(labelName,
  20970. { excludeParams: true, onlyBlockscoped: true })) {
  20971. paramScope["(labels)"][labelName]["(unused)"] = false;
  20972. }
  20973. }
  20974. if (token && (state.ignored.W117 || state.option.undef === false)) {
  20975. token.ignoreUndef = true;
  20976. }
  20977. _setupUsages(labelName);
  20978. _current["(usages)"][labelName]["(onlyUsedSubFunction)"] = false;
  20979. if (token) {
  20980. token["(function)"] = _currentFunctBody;
  20981. _current["(usages)"][labelName]["(tokens)"].push(token);
  20982. }
  20983. // blockscoped vars can't be used within their initializer (TDZ)
  20984. var label = _current["(labels)"][labelName];
  20985. if (label && label["(blockscoped)"] && !label["(initialized)"]) {
  20986. error("E056", token, labelName, label["(type)"]);
  20987. }
  20988. },
  20989. reassign: function(labelName, token) {
  20990. token.ignoreW020 = state.ignored.W020;
  20991. token.ignoreW021 = state.ignored.W021;
  20992. this.modify(labelName, token);
  20993. _current["(usages)"][labelName]["(reassigned)"].push(token);
  20994. },
  20995. modify: function(labelName, token) {
  20996. _setupUsages(labelName);
  20997. _current["(usages)"][labelName]["(onlyUsedSubFunction)"] = false;
  20998. _current["(usages)"][labelName]["(modified)"].push(token);
  20999. },
  21000. /**
  21001. * Adds a new variable
  21002. */
  21003. add: function(labelName, type, tok, unused, initialized) {
  21004. _current["(labels)"][labelName] = {
  21005. "(type)" : type,
  21006. "(token)": tok,
  21007. "(initialized)": !!initialized,
  21008. "(blockscoped)": true,
  21009. "(unused)": unused };
  21010. },
  21011. addBreakLabel: function(labelName, opts) {
  21012. var token = opts.token;
  21013. if (scopeManagerInst.funct.hasBreakLabel(labelName)) {
  21014. warning("E011", token, labelName);
  21015. }
  21016. else if (state.option.shadow === "outer") {
  21017. if (scopeManagerInst.funct.has(labelName)) {
  21018. warning("W004", token, labelName);
  21019. } else {
  21020. _checkOuterShadow(labelName, token);
  21021. }
  21022. }
  21023. _current["(breakLabels)"][labelName] = token;
  21024. }
  21025. }
  21026. };
  21027. return scopeManagerInst;
  21028. };
  21029. module.exports = scopeManager;
  21030. },{"events":6,"lodash":13}],20:[function(require,module,exports){
  21031. "use strict";
  21032. var NameStack = require("./name-stack.js");
  21033. var state = {
  21034. syntax: {},
  21035. /**
  21036. * Determine if the code currently being linted is strict mode code.
  21037. *
  21038. * @returns {boolean}
  21039. */
  21040. isStrict: function() {
  21041. return this.directive["use strict"] || this.inClassBody ||
  21042. this.option.module || this.option.strict === "implied";
  21043. },
  21044. /**
  21045. * Determine if the current state warrants a warning for statements outside
  21046. * of strict mode code.
  21047. *
  21048. * While emitting warnings based on function scope would be more intuitive
  21049. * (and less noisy), JSHint observes statement-based semantics in order to
  21050. * preserve legacy behavior.
  21051. *
  21052. * This method does not take the state of the parser into account, making no
  21053. * distinction between global code and function code. Because the "missing
  21054. * 'use strict'" warning is *also* reported at function boundaries, this
  21055. * function interprets `strict` option values `true` and `undefined` as
  21056. * equivalent.
  21057. */
  21058. stmtMissingStrict: function() {
  21059. if (this.option.strict === "global") {
  21060. return true;
  21061. }
  21062. if (this.option.strict === false) {
  21063. return false;
  21064. }
  21065. if (this.option.globalstrict) {
  21066. return true;
  21067. }
  21068. return false;
  21069. },
  21070. allowsGlobalUsd: function() {
  21071. return this.option.strict === "global" || this.option.globalstrict ||
  21072. this.option.module || this.impliedClosure();
  21073. },
  21074. /**
  21075. * Determine if the current configuration describes an environment that is
  21076. * wrapped in an immediately-invoked function expression prior to evaluation.
  21077. *
  21078. * @returns {boolean}
  21079. */
  21080. impliedClosure: function() {
  21081. return this.option.node || this.option.phantom || this.option.browserify;
  21082. },
  21083. // Assumption: chronologically ES3 < ES5 < ES6 < Moz
  21084. inMoz: function() {
  21085. return this.option.moz;
  21086. },
  21087. /**
  21088. * @param {boolean} strict - When `true`, only consider ES6 when in
  21089. * "esversion: 6" code.
  21090. */
  21091. inES6: function(strict) {
  21092. if (strict) {
  21093. return this.esVersion === 6;
  21094. }
  21095. return this.option.moz || this.esVersion >= 6;
  21096. },
  21097. /**
  21098. * @param {boolean} strict - When `true`, return `true` only when
  21099. * esVersion is exactly 5
  21100. */
  21101. inES5: function(strict) {
  21102. if (strict) {
  21103. return (!this.esVersion || this.esVersion === 5) && !this.option.moz;
  21104. }
  21105. return !this.esVersion || this.esVersion >= 5 || this.option.moz;
  21106. },
  21107. /**
  21108. * Determine the current version of the input language by inspecting the
  21109. * value of all ECMAScript-version-related options. This logic is necessary
  21110. * to ensure compatibility with deprecated options `es3`, `es5`, and
  21111. * `esnext`, and it may be drastically simplified when those options are
  21112. * removed.
  21113. *
  21114. * @returns {string|null} - the name of any incompatible option detected,
  21115. * `null` otherwise
  21116. */
  21117. inferEsVersion: function() {
  21118. var badOpt = null;
  21119. if (this.option.esversion) {
  21120. if (this.option.es3) {
  21121. badOpt = "es3";
  21122. } else if (this.option.es5) {
  21123. badOpt = "es5";
  21124. } else if (this.option.esnext) {
  21125. badOpt = "esnext";
  21126. }
  21127. if (badOpt) {
  21128. return badOpt;
  21129. }
  21130. if (this.option.esversion === 2015) {
  21131. this.esVersion = 6;
  21132. } else {
  21133. this.esVersion = this.option.esversion;
  21134. }
  21135. } else if (this.option.es3) {
  21136. this.esVersion = 3;
  21137. } else if (this.option.esnext) {
  21138. this.esVersion = 6;
  21139. }
  21140. return null;
  21141. },
  21142. reset: function() {
  21143. this.tokens = {
  21144. prev: null,
  21145. next: null,
  21146. curr: null
  21147. };
  21148. this.option = {};
  21149. this.esVersion = 5;
  21150. this.funct = null;
  21151. this.ignored = {};
  21152. this.directive = Object.create(null);
  21153. this.jsonMode = false;
  21154. this.lines = [];
  21155. this.tab = "";
  21156. this.cache = {}; // Node.JS doesn't have Map. Sniff.
  21157. this.ignoredLines = {};
  21158. this.forinifcheckneeded = false;
  21159. this.nameStack = new NameStack();
  21160. this.inClassBody = false;
  21161. }
  21162. };
  21163. exports.state = state;
  21164. },{"./name-stack.js":16}],21:[function(require,module,exports){
  21165. "use strict";
  21166. exports.register = function(linter) {
  21167. // Check for properties named __proto__. This special property was
  21168. // deprecated and then re-introduced for ES6.
  21169. linter.on("Identifier", function style_scanProto(data) {
  21170. if (linter.getOption("proto")) {
  21171. return;
  21172. }
  21173. if (data.name === "__proto__") {
  21174. linter.warn("W103", {
  21175. line: data.line,
  21176. char: data.char,
  21177. data: [ data.name, "6" ]
  21178. });
  21179. }
  21180. });
  21181. // Check for properties named __iterator__. This is a special property
  21182. // available only in browsers with JavaScript 1.7 implementation, but
  21183. // it is deprecated for ES6
  21184. linter.on("Identifier", function style_scanIterator(data) {
  21185. if (linter.getOption("iterator")) {
  21186. return;
  21187. }
  21188. if (data.name === "__iterator__") {
  21189. linter.warn("W103", {
  21190. line: data.line,
  21191. char: data.char,
  21192. data: [ data.name ]
  21193. });
  21194. }
  21195. });
  21196. // Check that all identifiers are using camelCase notation.
  21197. // Exceptions: names like MY_VAR and _myVar.
  21198. linter.on("Identifier", function style_scanCamelCase(data) {
  21199. if (!linter.getOption("camelcase")) {
  21200. return;
  21201. }
  21202. if (data.name.replace(/^_+|_+$/g, "").indexOf("_") > -1 && !data.name.match(/^[A-Z0-9_]*$/)) {
  21203. linter.warn("W106", {
  21204. line: data.line,
  21205. char: data.char,
  21206. data: [ data.name ]
  21207. });
  21208. }
  21209. });
  21210. // Enforce consistency in style of quoting.
  21211. linter.on("String", function style_scanQuotes(data) {
  21212. var quotmark = linter.getOption("quotmark");
  21213. var code;
  21214. if (!quotmark) {
  21215. return;
  21216. }
  21217. // If quotmark is set to 'single' warn about all double-quotes.
  21218. if (quotmark === "single" && data.quote !== "'") {
  21219. code = "W109";
  21220. }
  21221. // If quotmark is set to 'double' warn about all single-quotes.
  21222. if (quotmark === "double" && data.quote !== "\"") {
  21223. code = "W108";
  21224. }
  21225. // If quotmark is set to true, remember the first quotation style
  21226. // and then warn about all others.
  21227. if (quotmark === true) {
  21228. if (!linter.getCache("quotmark")) {
  21229. linter.setCache("quotmark", data.quote);
  21230. }
  21231. if (linter.getCache("quotmark") !== data.quote) {
  21232. code = "W110";
  21233. }
  21234. }
  21235. if (code) {
  21236. linter.warn(code, {
  21237. line: data.line,
  21238. char: data.char,
  21239. });
  21240. }
  21241. });
  21242. linter.on("Number", function style_scanNumbers(data) {
  21243. if (data.value.charAt(0) === ".") {
  21244. // Warn about a leading decimal point.
  21245. linter.warn("W008", {
  21246. line: data.line,
  21247. char: data.char,
  21248. data: [ data.value ]
  21249. });
  21250. }
  21251. if (data.value.substr(data.value.length - 1) === ".") {
  21252. // Warn about a trailing decimal point.
  21253. linter.warn("W047", {
  21254. line: data.line,
  21255. char: data.char,
  21256. data: [ data.value ]
  21257. });
  21258. }
  21259. if (/^00+/.test(data.value)) {
  21260. // Multiple leading zeroes.
  21261. linter.warn("W046", {
  21262. line: data.line,
  21263. char: data.char,
  21264. data: [ data.value ]
  21265. });
  21266. }
  21267. });
  21268. // Warn about script URLs.
  21269. linter.on("String", function style_scanJavaScriptURLs(data) {
  21270. var re = /^(?:javascript|jscript|ecmascript|vbscript|livescript)\s*:/i;
  21271. if (linter.getOption("scripturl")) {
  21272. return;
  21273. }
  21274. if (re.test(data.value)) {
  21275. linter.warn("W107", {
  21276. line: data.line,
  21277. char: data.char
  21278. });
  21279. }
  21280. });
  21281. };
  21282. },{}],22:[function(require,module,exports){
  21283. // jshint -W001
  21284. "use strict";
  21285. // Identifiers provided by the ECMAScript standard.
  21286. exports.reservedVars = {
  21287. NaN : false,
  21288. undefined : false
  21289. };
  21290. exports.ecmaIdentifiers = {
  21291. 3: {
  21292. Array : false,
  21293. Boolean : false,
  21294. Date : false,
  21295. decodeURI : false,
  21296. decodeURIComponent : false,
  21297. encodeURI : false,
  21298. encodeURIComponent : false,
  21299. Error : false,
  21300. "eval" : false,
  21301. EvalError : false,
  21302. Function : false,
  21303. hasOwnProperty : false,
  21304. Infinity : false,
  21305. isFinite : false,
  21306. isNaN : false,
  21307. Math : false,
  21308. Number : false,
  21309. Object : false,
  21310. parseInt : false,
  21311. parseFloat : false,
  21312. RangeError : false,
  21313. ReferenceError : false,
  21314. RegExp : false,
  21315. String : false,
  21316. SyntaxError : false,
  21317. TypeError : false,
  21318. URIError : false
  21319. },
  21320. 5: {
  21321. JSON : false
  21322. },
  21323. 6: {
  21324. ArrayBuffer : false,
  21325. DataView : false,
  21326. Float32Array : false,
  21327. Float64Array : false,
  21328. Int8Array : false,
  21329. Int16Array : false,
  21330. Int32Array : false,
  21331. Map : false,
  21332. Promise : false,
  21333. Proxy : false,
  21334. Reflect : false,
  21335. Set : false,
  21336. Symbol : false,
  21337. Uint8Array : false,
  21338. Uint16Array : false,
  21339. Uint32Array : false,
  21340. Uint8ClampedArray : false,
  21341. WeakMap : false,
  21342. WeakSet : false
  21343. }
  21344. };
  21345. // Global variables commonly provided by a web browser environment.
  21346. exports.browser = {
  21347. Audio : false,
  21348. Blob : false,
  21349. addEventListener : false,
  21350. applicationCache : false,
  21351. atob : false,
  21352. blur : false,
  21353. btoa : false,
  21354. cancelAnimationFrame : false,
  21355. CanvasGradient : false,
  21356. CanvasPattern : false,
  21357. CanvasRenderingContext2D: false,
  21358. CSS : false,
  21359. CSSImportRule : false,
  21360. CSSGroupingRule : false,
  21361. CSSMarginRule : false,
  21362. CSSMediaRule : false,
  21363. CSSNamespaceRule : false,
  21364. CSSPageRule : false,
  21365. CSSRule : false,
  21366. CSSRuleList : false,
  21367. CSSStyleDeclaration : false,
  21368. CSSStyleRule : false,
  21369. CSSStyleSheet : false,
  21370. clearInterval : false,
  21371. clearTimeout : false,
  21372. close : false,
  21373. closed : false,
  21374. Comment : false,
  21375. CompositionEvent : false,
  21376. CustomEvent : false,
  21377. DOMParser : false,
  21378. defaultStatus : false,
  21379. Document : false,
  21380. document : false,
  21381. DocumentFragment : false,
  21382. Element : false,
  21383. ElementTimeControl : false,
  21384. Event : false,
  21385. event : false,
  21386. fetch : false,
  21387. File : false,
  21388. FileList : false,
  21389. FileReader : false,
  21390. FormData : false,
  21391. focus : false,
  21392. frames : false,
  21393. getComputedStyle : false,
  21394. Headers : false,
  21395. HTMLAnchorElement : false,
  21396. HTMLAreaElement : false,
  21397. HTMLAudioElement : false,
  21398. HTMLBaseElement : false,
  21399. HTMLBlockquoteElement: false,
  21400. HTMLBodyElement : false,
  21401. HTMLBRElement : false,
  21402. HTMLButtonElement : false,
  21403. HTMLCanvasElement : false,
  21404. HTMLCollection : false,
  21405. HTMLDataElement : false,
  21406. HTMLDataListElement : false,
  21407. HTMLDetailsElement : false,
  21408. HTMLDialogElement : false,
  21409. HTMLDirectoryElement : false,
  21410. HTMLDivElement : false,
  21411. HTMLDListElement : false,
  21412. HTMLElement : false,
  21413. HTMLEmbedElement : false,
  21414. HTMLFieldSetElement : false,
  21415. HTMLFontElement : false,
  21416. HTMLFormElement : false,
  21417. HTMLFrameElement : false,
  21418. HTMLFrameSetElement : false,
  21419. HTMLHeadElement : false,
  21420. HTMLHeadingElement : false,
  21421. HTMLHRElement : false,
  21422. HTMLHtmlElement : false,
  21423. HTMLIFrameElement : false,
  21424. HTMLImageElement : false,
  21425. HTMLInputElement : false,
  21426. /* HTMLIsIndexElement was removed from the WHATWG HTML spec;
  21427. see https://github.com/whatwg/html/pull/1095.
  21428. HTMLIsIndexElement has been removed from browsers; see:
  21429. • Chromium Removal: https://codereview.chromium.org/96653004/
  21430. • Gecko Removal: https://bugzilla.mozilla.org/show_bug.cgi?id=1266495
  21431. • WebKit Removal: https://bugs.webkit.org/show_bug.cgi?id=7139.
  21432. See also the discussion at https://github.com/jshint/jshint/pull/3222. */
  21433. HTMLIsIndexElement : false,
  21434. HTMLLabelElement : false,
  21435. HTMLLayerElement : false,
  21436. HTMLLegendElement : false,
  21437. HTMLLIElement : false,
  21438. HTMLLinkElement : false,
  21439. HTMLMapElement : false,
  21440. HTMLMarqueeElement : false,
  21441. HTMLMediaElement : false,
  21442. HTMLMenuElement : false,
  21443. HTMLMetaElement : false,
  21444. HTMLMeterElement : false,
  21445. HTMLModElement : false,
  21446. HTMLObjectElement : false,
  21447. HTMLOListElement : false,
  21448. HTMLOptGroupElement : false,
  21449. HTMLOptionElement : false,
  21450. HTMLParagraphElement : false,
  21451. HTMLParamElement : false,
  21452. HTMLPictureElement : false,
  21453. HTMLPreElement : false,
  21454. HTMLProgressElement : false,
  21455. HTMLQuoteElement : false,
  21456. HTMLScriptElement : false,
  21457. HTMLSelectElement : false,
  21458. HTMLSlotElement : false,
  21459. HTMLSourceElement : false,
  21460. HTMLStyleElement : false,
  21461. HTMLTableCaptionElement: false,
  21462. HTMLTableCellElement : false,
  21463. HTMLTableColElement : false,
  21464. HTMLTableElement : false,
  21465. HTMLTableRowElement : false,
  21466. HTMLTableSectionElement: false,
  21467. HTMLTemplateElement : false,
  21468. HTMLTextAreaElement : false,
  21469. HTMLTimeElement : false,
  21470. HTMLTitleElement : false,
  21471. HTMLTrackElement : false,
  21472. HTMLUListElement : false,
  21473. HTMLVideoElement : false,
  21474. history : false,
  21475. Image : false,
  21476. IntersectionObserver : false,
  21477. Intl : false,
  21478. length : false,
  21479. localStorage : false,
  21480. location : false,
  21481. matchMedia : false,
  21482. MediaList : false,
  21483. MediaRecorder : false,
  21484. MessageChannel : false,
  21485. MessageEvent : false,
  21486. MessagePort : false,
  21487. MouseEvent : false,
  21488. moveBy : false,
  21489. moveTo : false,
  21490. MutationObserver : false,
  21491. name : false,
  21492. Node : false,
  21493. NodeFilter : false,
  21494. NodeList : false,
  21495. Notification : false,
  21496. navigator : false,
  21497. onbeforeunload : true,
  21498. onblur : true,
  21499. onerror : true,
  21500. onfocus : true,
  21501. onload : true,
  21502. onresize : true,
  21503. onunload : true,
  21504. open : false,
  21505. openDatabase : false,
  21506. opener : false,
  21507. Option : false,
  21508. parent : false,
  21509. performance : false,
  21510. print : false,
  21511. Range : false,
  21512. requestAnimationFrame : false,
  21513. removeEventListener : false,
  21514. Request : false,
  21515. resizeBy : false,
  21516. resizeTo : false,
  21517. Response : false,
  21518. screen : false,
  21519. scroll : false,
  21520. scrollBy : false,
  21521. scrollTo : false,
  21522. sessionStorage : false,
  21523. setInterval : false,
  21524. setTimeout : false,
  21525. SharedWorker : false,
  21526. status : false,
  21527. Storage : false,
  21528. StyleSheet : false,
  21529. SVGAElement : false,
  21530. SVGAltGlyphDefElement: false,
  21531. SVGAltGlyphElement : false,
  21532. SVGAltGlyphItemElement: false,
  21533. SVGAngle : false,
  21534. SVGAnimateColorElement: false,
  21535. SVGAnimateElement : false,
  21536. SVGAnimateMotionElement: false,
  21537. SVGAnimateTransformElement: false,
  21538. SVGAnimatedAngle : false,
  21539. SVGAnimatedBoolean : false,
  21540. SVGAnimatedEnumeration: false,
  21541. SVGAnimatedInteger : false,
  21542. SVGAnimatedLength : false,
  21543. SVGAnimatedLengthList: false,
  21544. SVGAnimatedNumber : false,
  21545. SVGAnimatedNumberList: false,
  21546. SVGAnimatedPathData : false,
  21547. SVGAnimatedPoints : false,
  21548. SVGAnimatedPreserveAspectRatio: false,
  21549. SVGAnimatedRect : false,
  21550. SVGAnimatedString : false,
  21551. SVGAnimatedTransformList: false,
  21552. SVGAnimationElement : false,
  21553. SVGCSSRule : false,
  21554. SVGCircleElement : false,
  21555. SVGClipPathElement : false,
  21556. SVGColor : false,
  21557. SVGColorProfileElement: false,
  21558. SVGColorProfileRule : false,
  21559. SVGComponentTransferFunctionElement: false,
  21560. SVGCursorElement : false,
  21561. SVGDefsElement : false,
  21562. SVGDescElement : false,
  21563. SVGDocument : false,
  21564. SVGElement : false,
  21565. SVGElementInstance : false,
  21566. SVGElementInstanceList: false,
  21567. SVGEllipseElement : false,
  21568. SVGExternalResourcesRequired: false,
  21569. SVGFEBlendElement : false,
  21570. SVGFEColorMatrixElement: false,
  21571. SVGFEComponentTransferElement: false,
  21572. SVGFECompositeElement: false,
  21573. SVGFEConvolveMatrixElement: false,
  21574. SVGFEDiffuseLightingElement: false,
  21575. SVGFEDisplacementMapElement: false,
  21576. SVGFEDistantLightElement: false,
  21577. SVGFEFloodElement : false,
  21578. SVGFEFuncAElement : false,
  21579. SVGFEFuncBElement : false,
  21580. SVGFEFuncGElement : false,
  21581. SVGFEFuncRElement : false,
  21582. SVGFEGaussianBlurElement: false,
  21583. SVGFEImageElement : false,
  21584. SVGFEMergeElement : false,
  21585. SVGFEMergeNodeElement: false,
  21586. SVGFEMorphologyElement: false,
  21587. SVGFEOffsetElement : false,
  21588. SVGFEPointLightElement: false,
  21589. SVGFESpecularLightingElement: false,
  21590. SVGFESpotLightElement: false,
  21591. SVGFETileElement : false,
  21592. SVGFETurbulenceElement: false,
  21593. SVGFilterElement : false,
  21594. SVGFilterPrimitiveStandardAttributes: false,
  21595. SVGFitToViewBox : false,
  21596. SVGFontElement : false,
  21597. SVGFontFaceElement : false,
  21598. SVGFontFaceFormatElement: false,
  21599. SVGFontFaceNameElement: false,
  21600. SVGFontFaceSrcElement: false,
  21601. SVGFontFaceUriElement: false,
  21602. SVGForeignObjectElement: false,
  21603. SVGGElement : false,
  21604. SVGGlyphElement : false,
  21605. SVGGlyphRefElement : false,
  21606. SVGGradientElement : false,
  21607. SVGHKernElement : false,
  21608. SVGICCColor : false,
  21609. SVGImageElement : false,
  21610. SVGLangSpace : false,
  21611. SVGLength : false,
  21612. SVGLengthList : false,
  21613. SVGLineElement : false,
  21614. SVGLinearGradientElement: false,
  21615. SVGLocatable : false,
  21616. SVGMPathElement : false,
  21617. SVGMarkerElement : false,
  21618. SVGMaskElement : false,
  21619. SVGMatrix : false,
  21620. SVGMetadataElement : false,
  21621. SVGMissingGlyphElement: false,
  21622. SVGNumber : false,
  21623. SVGNumberList : false,
  21624. SVGPaint : false,
  21625. SVGPathElement : false,
  21626. SVGPathSeg : false,
  21627. SVGPathSegArcAbs : false,
  21628. SVGPathSegArcRel : false,
  21629. SVGPathSegClosePath : false,
  21630. SVGPathSegCurvetoCubicAbs: false,
  21631. SVGPathSegCurvetoCubicRel: false,
  21632. SVGPathSegCurvetoCubicSmoothAbs: false,
  21633. SVGPathSegCurvetoCubicSmoothRel: false,
  21634. SVGPathSegCurvetoQuadraticAbs: false,
  21635. SVGPathSegCurvetoQuadraticRel: false,
  21636. SVGPathSegCurvetoQuadraticSmoothAbs: false,
  21637. SVGPathSegCurvetoQuadraticSmoothRel: false,
  21638. SVGPathSegLinetoAbs : false,
  21639. SVGPathSegLinetoHorizontalAbs: false,
  21640. SVGPathSegLinetoHorizontalRel: false,
  21641. SVGPathSegLinetoRel : false,
  21642. SVGPathSegLinetoVerticalAbs: false,
  21643. SVGPathSegLinetoVerticalRel: false,
  21644. SVGPathSegList : false,
  21645. SVGPathSegMovetoAbs : false,
  21646. SVGPathSegMovetoRel : false,
  21647. SVGPatternElement : false,
  21648. SVGPoint : false,
  21649. SVGPointList : false,
  21650. SVGPolygonElement : false,
  21651. SVGPolylineElement : false,
  21652. SVGPreserveAspectRatio: false,
  21653. SVGRadialGradientElement: false,
  21654. SVGRect : false,
  21655. SVGRectElement : false,
  21656. SVGRenderingIntent : false,
  21657. SVGSVGElement : false,
  21658. SVGScriptElement : false,
  21659. SVGSetElement : false,
  21660. SVGStopElement : false,
  21661. SVGStringList : false,
  21662. SVGStylable : false,
  21663. SVGStyleElement : false,
  21664. SVGSwitchElement : false,
  21665. SVGSymbolElement : false,
  21666. SVGTRefElement : false,
  21667. SVGTSpanElement : false,
  21668. SVGTests : false,
  21669. SVGTextContentElement: false,
  21670. SVGTextElement : false,
  21671. SVGTextPathElement : false,
  21672. SVGTextPositioningElement: false,
  21673. SVGTitleElement : false,
  21674. SVGTransform : false,
  21675. SVGTransformList : false,
  21676. SVGTransformable : false,
  21677. SVGURIReference : false,
  21678. SVGUnitTypes : false,
  21679. SVGUseElement : false,
  21680. SVGVKernElement : false,
  21681. SVGViewElement : false,
  21682. SVGViewSpec : false,
  21683. SVGZoomAndPan : false,
  21684. Text : false,
  21685. TextDecoder : false,
  21686. TextEncoder : false,
  21687. TimeEvent : false,
  21688. top : false,
  21689. URL : false,
  21690. WebGLActiveInfo : false,
  21691. WebGLBuffer : false,
  21692. WebGLContextEvent : false,
  21693. WebGLFramebuffer : false,
  21694. WebGLProgram : false,
  21695. WebGLRenderbuffer : false,
  21696. WebGLRenderingContext: false,
  21697. WebGLShader : false,
  21698. WebGLShaderPrecisionFormat: false,
  21699. WebGLTexture : false,
  21700. WebGLUniformLocation : false,
  21701. WebSocket : false,
  21702. window : false,
  21703. Window : false,
  21704. Worker : false,
  21705. XDomainRequest : false,
  21706. XMLDocument : false,
  21707. XMLHttpRequest : false,
  21708. XMLSerializer : false,
  21709. XPathEvaluator : false,
  21710. XPathException : false,
  21711. XPathExpression : false,
  21712. XPathNamespace : false,
  21713. XPathNSResolver : false,
  21714. XPathResult : false
  21715. };
  21716. exports.devel = {
  21717. alert : false,
  21718. confirm: false,
  21719. console: false,
  21720. Debug : false,
  21721. opera : false,
  21722. prompt : false
  21723. };
  21724. exports.worker = {
  21725. importScripts : true,
  21726. onmessage : true,
  21727. postMessage : true,
  21728. self : true,
  21729. FileReaderSync : true
  21730. };
  21731. // Widely adopted global names that are not part of ECMAScript standard
  21732. exports.nonstandard = {
  21733. escape : false,
  21734. unescape: false
  21735. };
  21736. // Globals provided by popular JavaScript environments.
  21737. exports.couch = {
  21738. "require" : false,
  21739. respond : false,
  21740. getRow : false,
  21741. emit : false,
  21742. send : false,
  21743. start : false,
  21744. sum : false,
  21745. log : false,
  21746. exports : false,
  21747. module : false,
  21748. provides : false
  21749. };
  21750. exports.node = {
  21751. __filename : false,
  21752. __dirname : false,
  21753. arguments : false,
  21754. GLOBAL : false,
  21755. global : false,
  21756. module : false,
  21757. require : false,
  21758. // These globals are writeable because Node allows the following
  21759. // usage pattern: var Buffer = require("buffer").Buffer;
  21760. Buffer : true,
  21761. console : true,
  21762. exports : true,
  21763. process : true,
  21764. setTimeout : true,
  21765. clearTimeout : true,
  21766. setInterval : true,
  21767. clearInterval : true,
  21768. setImmediate : true, // v0.9.1+
  21769. clearImmediate: true // v0.9.1+
  21770. };
  21771. exports.browserify = {
  21772. __filename : false,
  21773. __dirname : false,
  21774. global : false,
  21775. module : false,
  21776. require : false,
  21777. Buffer : true,
  21778. exports : true,
  21779. process : true
  21780. };
  21781. exports.phantom = {
  21782. phantom : true,
  21783. require : true,
  21784. WebPage : true,
  21785. console : true, // in examples, but undocumented
  21786. exports : true // v1.7+
  21787. };
  21788. exports.qunit = {
  21789. asyncTest : false,
  21790. deepEqual : false,
  21791. equal : false,
  21792. expect : false,
  21793. module : false,
  21794. notDeepEqual : false,
  21795. notEqual : false,
  21796. notOk : false,
  21797. notPropEqual : false,
  21798. notStrictEqual : false,
  21799. ok : false,
  21800. propEqual : false,
  21801. QUnit : false,
  21802. raises : false,
  21803. start : false,
  21804. stop : false,
  21805. strictEqual : false,
  21806. test : false,
  21807. "throws" : false
  21808. };
  21809. exports.rhino = {
  21810. arguments : false,
  21811. defineClass : false,
  21812. deserialize : false,
  21813. gc : false,
  21814. help : false,
  21815. importClass : false,
  21816. importPackage: false,
  21817. "java" : false,
  21818. load : false,
  21819. loadClass : false,
  21820. Packages : false,
  21821. print : false,
  21822. quit : false,
  21823. readFile : false,
  21824. readUrl : false,
  21825. runCommand : false,
  21826. seal : false,
  21827. serialize : false,
  21828. spawn : false,
  21829. sync : false,
  21830. toint32 : false,
  21831. version : false
  21832. };
  21833. exports.shelljs = {
  21834. target : false,
  21835. echo : false,
  21836. exit : false,
  21837. cd : false,
  21838. pwd : false,
  21839. ls : false,
  21840. find : false,
  21841. cp : false,
  21842. rm : false,
  21843. mv : false,
  21844. mkdir : false,
  21845. test : false,
  21846. cat : false,
  21847. sed : false,
  21848. grep : false,
  21849. which : false,
  21850. dirs : false,
  21851. pushd : false,
  21852. popd : false,
  21853. env : false,
  21854. exec : false,
  21855. chmod : false,
  21856. config : false,
  21857. error : false,
  21858. tempdir : false
  21859. };
  21860. exports.typed = {
  21861. ArrayBuffer : false,
  21862. ArrayBufferView : false,
  21863. DataView : false,
  21864. Float32Array : false,
  21865. Float64Array : false,
  21866. Int16Array : false,
  21867. Int32Array : false,
  21868. Int8Array : false,
  21869. Uint16Array : false,
  21870. Uint32Array : false,
  21871. Uint8Array : false,
  21872. Uint8ClampedArray : false
  21873. };
  21874. exports.wsh = {
  21875. ActiveXObject : true,
  21876. Enumerator : true,
  21877. GetObject : true,
  21878. ScriptEngine : true,
  21879. ScriptEngineBuildVersion : true,
  21880. ScriptEngineMajorVersion : true,
  21881. ScriptEngineMinorVersion : true,
  21882. VBArray : true,
  21883. WSH : true,
  21884. WScript : true,
  21885. XDomainRequest : true
  21886. };
  21887. // Globals provided by popular JavaScript libraries.
  21888. exports.dojo = {
  21889. dojo : false,
  21890. dijit : false,
  21891. dojox : false,
  21892. define : false,
  21893. "require": false
  21894. };
  21895. exports.jquery = {
  21896. "$" : false,
  21897. jQuery : false
  21898. };
  21899. exports.mootools = {
  21900. "$" : false,
  21901. "$$" : false,
  21902. Asset : false,
  21903. Browser : false,
  21904. Chain : false,
  21905. Class : false,
  21906. Color : false,
  21907. Cookie : false,
  21908. Core : false,
  21909. Document : false,
  21910. DomReady : false,
  21911. DOMEvent : false,
  21912. DOMReady : false,
  21913. Drag : false,
  21914. Element : false,
  21915. Elements : false,
  21916. Event : false,
  21917. Events : false,
  21918. Fx : false,
  21919. Group : false,
  21920. Hash : false,
  21921. HtmlTable : false,
  21922. IFrame : false,
  21923. IframeShim : false,
  21924. InputValidator: false,
  21925. instanceOf : false,
  21926. Keyboard : false,
  21927. Locale : false,
  21928. Mask : false,
  21929. MooTools : false,
  21930. Native : false,
  21931. Options : false,
  21932. OverText : false,
  21933. Request : false,
  21934. Scroller : false,
  21935. Slick : false,
  21936. Slider : false,
  21937. Sortables : false,
  21938. Spinner : false,
  21939. Swiff : false,
  21940. Tips : false,
  21941. Type : false,
  21942. typeOf : false,
  21943. URI : false,
  21944. Window : false
  21945. };
  21946. exports.prototypejs = {
  21947. "$" : false,
  21948. "$$" : false,
  21949. "$A" : false,
  21950. "$F" : false,
  21951. "$H" : false,
  21952. "$R" : false,
  21953. "$break" : false,
  21954. "$continue" : false,
  21955. "$w" : false,
  21956. Abstract : false,
  21957. Ajax : false,
  21958. Class : false,
  21959. Enumerable : false,
  21960. Element : false,
  21961. Event : false,
  21962. Field : false,
  21963. Form : false,
  21964. Hash : false,
  21965. Insertion : false,
  21966. ObjectRange : false,
  21967. PeriodicalExecuter: false,
  21968. Position : false,
  21969. Prototype : false,
  21970. Selector : false,
  21971. Template : false,
  21972. Toggle : false,
  21973. Try : false,
  21974. Autocompleter : false,
  21975. Builder : false,
  21976. Control : false,
  21977. Draggable : false,
  21978. Draggables : false,
  21979. Droppables : false,
  21980. Effect : false,
  21981. Sortable : false,
  21982. SortableObserver : false,
  21983. Sound : false,
  21984. Scriptaculous : false
  21985. };
  21986. exports.yui = {
  21987. YUI : false,
  21988. Y : false,
  21989. YUI_config: false
  21990. };
  21991. exports.mocha = {
  21992. // Global (for config etc.)
  21993. mocha : false,
  21994. // BDD
  21995. describe : false,
  21996. xdescribe : false,
  21997. it : false,
  21998. xit : false,
  21999. context : false,
  22000. xcontext : false,
  22001. before : false,
  22002. after : false,
  22003. beforeEach : false,
  22004. afterEach : false,
  22005. // TDD
  22006. suite : false,
  22007. test : false,
  22008. setup : false,
  22009. teardown : false,
  22010. suiteSetup : false,
  22011. suiteTeardown : false
  22012. };
  22013. exports.jasmine = {
  22014. jasmine : false,
  22015. describe : false,
  22016. xdescribe : false,
  22017. it : false,
  22018. xit : false,
  22019. beforeEach : false,
  22020. afterEach : false,
  22021. setFixtures : false,
  22022. loadFixtures: false,
  22023. spyOn : false,
  22024. expect : false,
  22025. // Jasmine 1.3
  22026. runs : false,
  22027. waitsFor : false,
  22028. waits : false,
  22029. // Jasmine 2.1
  22030. beforeAll : false,
  22031. afterAll : false,
  22032. fail : false,
  22033. fdescribe : false,
  22034. fit : false,
  22035. pending : false,
  22036. // Jasmine 2.6
  22037. spyOnProperty: false
  22038. };
  22039. },{}],"jshint":[function(require,module,exports){
  22040. /*!
  22041. * JSHint, by JSHint Community.
  22042. *
  22043. * This file (and this file only) is licensed under the same slightly modified
  22044. * MIT license that JSLint is. It stops evil-doers everywhere:
  22045. *
  22046. * Copyright (c) 2002 Douglas Crockford (www.JSLint.com)
  22047. *
  22048. * Permission is hereby granted, free of charge, to any person obtaining
  22049. * a copy of this software and associated documentation files (the "Software"),
  22050. * to deal in the Software without restriction, including without limitation
  22051. * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  22052. * and/or sell copies of the Software, and to permit persons to whom
  22053. * the Software is furnished to do so, subject to the following conditions:
  22054. *
  22055. * The above copyright notice and this permission notice shall be included
  22056. * in all copies or substantial portions of the Software.
  22057. *
  22058. * The Software shall be used for Good, not Evil.
  22059. *
  22060. * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  22061. * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  22062. * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  22063. * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  22064. * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  22065. * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  22066. * DEALINGS IN THE SOFTWARE.
  22067. *
  22068. */
  22069. /*jshint quotmark:double */
  22070. /*exported console */
  22071. var _ = require("lodash");
  22072. var events = require("events");
  22073. var vars = require("./vars.js");
  22074. var messages = require("./messages.js");
  22075. var Lexer = require("./lex.js").Lexer;
  22076. var reg = require("./reg.js");
  22077. var state = require("./state.js").state;
  22078. var style = require("./style.js");
  22079. var options = require("./options.js");
  22080. var scopeManager = require("./scope-manager.js");
  22081. // We need this module here because environments such as IE and Rhino
  22082. // don't necessarilly expose the 'console' API and browserify uses
  22083. // it to log things. It's a sad state of affair, really.
  22084. var console = require("console-browserify");
  22085. // We build the application inside a function so that we produce only a singleton
  22086. // variable. That function will be invoked immediately, and its return value is
  22087. // the JSHINT function itself.
  22088. var JSHINT = (function() {
  22089. "use strict";
  22090. var api, // Extension API
  22091. // These are operators that should not be used with the ! operator.
  22092. bang = {
  22093. "<" : true,
  22094. "<=" : true,
  22095. "==" : true,
  22096. "===": true,
  22097. "!==": true,
  22098. "!=" : true,
  22099. ">" : true,
  22100. ">=" : true,
  22101. "+" : true,
  22102. "-" : true,
  22103. "*" : true,
  22104. "/" : true,
  22105. "%" : true
  22106. },
  22107. declared, // Globals that were declared using /*global ... */ syntax.
  22108. functions, // All of the functions
  22109. inblock,
  22110. indent,
  22111. lookahead,
  22112. lex,
  22113. member,
  22114. membersOnly,
  22115. predefined, // Global variables defined by option
  22116. urls,
  22117. extraModules = [],
  22118. emitter = new events.EventEmitter();
  22119. function checkOption(name, t) {
  22120. name = name.trim();
  22121. if (/^[+-]W\d{3}$/g.test(name)) {
  22122. return true;
  22123. }
  22124. if (options.validNames.indexOf(name) === -1) {
  22125. if (t.type !== "jslint" && !_.has(options.removed, name)) {
  22126. error("E001", t, name);
  22127. return false;
  22128. }
  22129. }
  22130. return true;
  22131. }
  22132. function isString(obj) {
  22133. return Object.prototype.toString.call(obj) === "[object String]";
  22134. }
  22135. function isIdentifier(tkn, value) {
  22136. if (!tkn)
  22137. return false;
  22138. if (!tkn.identifier || tkn.value !== value)
  22139. return false;
  22140. return true;
  22141. }
  22142. function isReserved(token) {
  22143. if (!token.reserved) {
  22144. return false;
  22145. }
  22146. var meta = token.meta;
  22147. if (meta && meta.isFutureReservedWord) {
  22148. if (meta.moduleOnly && !state.option.module) {
  22149. return false;
  22150. }
  22151. if (state.inES5()) {
  22152. // ES3 FutureReservedWord in an ES5 environment.
  22153. if (!meta.es5) {
  22154. return false;
  22155. }
  22156. // Some ES5 FutureReservedWord identifiers are active only
  22157. // within a strict mode environment.
  22158. if (meta.strictOnly) {
  22159. if (!state.option.strict && !state.isStrict()) {
  22160. return false;
  22161. }
  22162. }
  22163. if (token.isProperty) {
  22164. return false;
  22165. }
  22166. }
  22167. }
  22168. return true;
  22169. }
  22170. function supplant(str, data) {
  22171. return str.replace(/\{([^{}]*)\}/g, function(a, b) {
  22172. var r = data[b];
  22173. return typeof r === "string" || typeof r === "number" ? r : a;
  22174. });
  22175. }
  22176. function combine(dest, src) {
  22177. Object.keys(src).forEach(function(name) {
  22178. if (_.has(JSHINT.blacklist, name)) return;
  22179. dest[name] = src[name];
  22180. });
  22181. }
  22182. function processenforceall() {
  22183. if (state.option.enforceall) {
  22184. for (var enforceopt in options.bool.enforcing) {
  22185. if (state.option[enforceopt] === undefined &&
  22186. !options.noenforceall[enforceopt]) {
  22187. state.option[enforceopt] = true;
  22188. }
  22189. }
  22190. for (var relaxopt in options.bool.relaxing) {
  22191. if (state.option[relaxopt] === undefined) {
  22192. state.option[relaxopt] = false;
  22193. }
  22194. }
  22195. }
  22196. }
  22197. /**
  22198. * Apply all linting options according to the status of the `state` object.
  22199. */
  22200. function applyOptions() {
  22201. var badESOpt = null;
  22202. processenforceall();
  22203. /**
  22204. * TODO: Remove in JSHint 3
  22205. */
  22206. badESOpt = state.inferEsVersion();
  22207. if (badESOpt) {
  22208. quit("E059", state.tokens.next, "esversion", badESOpt);
  22209. }
  22210. if (state.inES5()) {
  22211. combine(predefined, vars.ecmaIdentifiers[5]);
  22212. }
  22213. if (state.inES6()) {
  22214. combine(predefined, vars.ecmaIdentifiers[6]);
  22215. }
  22216. /**
  22217. * Use `in` to check for the presence of any explicitly-specified value for
  22218. * `globalstrict` because both `true` and `false` should trigger an error.
  22219. */
  22220. if (state.option.strict === "global" && "globalstrict" in state.option) {
  22221. quit("E059", state.tokens.next, "strict", "globalstrict");
  22222. }
  22223. if (state.option.module) {
  22224. /**
  22225. * TODO: Extend this restriction to *all* ES6-specific options.
  22226. */
  22227. if (!state.inES6()) {
  22228. warning("W134", state.tokens.next, "module", 6);
  22229. }
  22230. }
  22231. if (state.option.couch) {
  22232. combine(predefined, vars.couch);
  22233. }
  22234. if (state.option.qunit) {
  22235. combine(predefined, vars.qunit);
  22236. }
  22237. if (state.option.rhino) {
  22238. combine(predefined, vars.rhino);
  22239. }
  22240. if (state.option.shelljs) {
  22241. combine(predefined, vars.shelljs);
  22242. combine(predefined, vars.node);
  22243. }
  22244. if (state.option.typed) {
  22245. combine(predefined, vars.typed);
  22246. }
  22247. if (state.option.phantom) {
  22248. combine(predefined, vars.phantom);
  22249. }
  22250. if (state.option.prototypejs) {
  22251. combine(predefined, vars.prototypejs);
  22252. }
  22253. if (state.option.node) {
  22254. combine(predefined, vars.node);
  22255. combine(predefined, vars.typed);
  22256. }
  22257. if (state.option.devel) {
  22258. combine(predefined, vars.devel);
  22259. }
  22260. if (state.option.dojo) {
  22261. combine(predefined, vars.dojo);
  22262. }
  22263. if (state.option.browser) {
  22264. combine(predefined, vars.browser);
  22265. combine(predefined, vars.typed);
  22266. }
  22267. if (state.option.browserify) {
  22268. combine(predefined, vars.browser);
  22269. combine(predefined, vars.typed);
  22270. combine(predefined, vars.browserify);
  22271. }
  22272. if (state.option.nonstandard) {
  22273. combine(predefined, vars.nonstandard);
  22274. }
  22275. if (state.option.jasmine) {
  22276. combine(predefined, vars.jasmine);
  22277. }
  22278. if (state.option.jquery) {
  22279. combine(predefined, vars.jquery);
  22280. }
  22281. if (state.option.mootools) {
  22282. combine(predefined, vars.mootools);
  22283. }
  22284. if (state.option.worker) {
  22285. combine(predefined, vars.worker);
  22286. }
  22287. if (state.option.wsh) {
  22288. combine(predefined, vars.wsh);
  22289. }
  22290. if (state.option.yui) {
  22291. combine(predefined, vars.yui);
  22292. }
  22293. if (state.option.mocha) {
  22294. combine(predefined, vars.mocha);
  22295. }
  22296. }
  22297. // Produce an error warning.
  22298. function quit(code, token, a, b) {
  22299. var percentage = Math.floor((token.line / state.lines.length) * 100);
  22300. var message = messages.errors[code].desc;
  22301. var exception = {
  22302. name: "JSHintError",
  22303. line: token.line,
  22304. character: token.from,
  22305. message: message + " (" + percentage + "% scanned).",
  22306. raw: message,
  22307. code: code,
  22308. a: a,
  22309. b: b
  22310. };
  22311. exception.reason = supplant(message, exception) + " (" + percentage +
  22312. "% scanned).";
  22313. throw exception;
  22314. }
  22315. function removeIgnoredMessages() {
  22316. var ignored = state.ignoredLines;
  22317. if (_.isEmpty(ignored)) return;
  22318. JSHINT.errors = _.reject(JSHINT.errors, function(err) { return ignored[err.line] });
  22319. }
  22320. function warning(code, t, a, b, c, d) {
  22321. var ch, l, w, msg;
  22322. if (/^W\d{3}$/.test(code)) {
  22323. if (state.ignored[code])
  22324. return;
  22325. msg = messages.warnings[code];
  22326. } else if (/E\d{3}/.test(code)) {
  22327. msg = messages.errors[code];
  22328. } else if (/I\d{3}/.test(code)) {
  22329. msg = messages.info[code];
  22330. }
  22331. t = t || state.tokens.next || {};
  22332. if (t.id === "(end)") { // `~
  22333. t = state.tokens.curr;
  22334. }
  22335. l = t.line;
  22336. ch = t.from;
  22337. w = {
  22338. id: "(error)",
  22339. raw: msg.desc,
  22340. code: msg.code,
  22341. evidence: state.lines[l - 1] || "",
  22342. line: l,
  22343. character: ch,
  22344. scope: JSHINT.scope,
  22345. a: a,
  22346. b: b,
  22347. c: c,
  22348. d: d
  22349. };
  22350. w.reason = supplant(msg.desc, w);
  22351. JSHINT.errors.push(w);
  22352. removeIgnoredMessages();
  22353. if (JSHINT.errors.length >= state.option.maxerr)
  22354. quit("E043", t);
  22355. return w;
  22356. }
  22357. function warningAt(m, l, ch, a, b, c, d) {
  22358. return warning(m, {
  22359. line: l,
  22360. from: ch
  22361. }, a, b, c, d);
  22362. }
  22363. function error(m, t, a, b, c, d) {
  22364. warning(m, t, a, b, c, d);
  22365. }
  22366. function errorAt(m, l, ch, a, b, c, d) {
  22367. return error(m, {
  22368. line: l,
  22369. from: ch
  22370. }, a, b, c, d);
  22371. }
  22372. // Tracking of "internal" scripts, like eval containing a static string
  22373. function addEvalCode(elem, token) {
  22374. JSHINT.internals.push({
  22375. id: "(internal)",
  22376. elem: elem,
  22377. token: token,
  22378. code: token.value.replace(/([^\\])(\\*)\2\\n/g, "$1\n")
  22379. });
  22380. }
  22381. /**
  22382. * Process an inline linting directive
  22383. *
  22384. * @param {Token} directiveToken - the directive-bearing comment token
  22385. * @param {Token} previous - the token that preceeds the directive
  22386. */
  22387. function lintingDirective(directiveToken, previous) {
  22388. var body = directiveToken.body.split(",")
  22389. .map(function(s) { return s.trim(); });
  22390. var predef = {};
  22391. if (directiveToken.type === "falls through") {
  22392. previous.caseFallsThrough = true;
  22393. return;
  22394. }
  22395. if (directiveToken.type === "globals") {
  22396. body.forEach(function(g, idx) {
  22397. g = g.split(":");
  22398. var key = g[0].trim();
  22399. var val = (g[1] || "").trim();
  22400. if (key === "-" || !key.length) {
  22401. // Ignore trailing comma
  22402. if (idx > 0 && idx === body.length - 1) {
  22403. return;
  22404. }
  22405. error("E002", directiveToken);
  22406. return;
  22407. }
  22408. if (key.charAt(0) === "-") {
  22409. key = key.slice(1);
  22410. val = false;
  22411. JSHINT.blacklist[key] = key;
  22412. delete predefined[key];
  22413. } else {
  22414. predef[key] = (val === "true");
  22415. }
  22416. });
  22417. combine(predefined, predef);
  22418. for (var key in predef) {
  22419. if (_.has(predef, key)) {
  22420. declared[key] = directiveToken;
  22421. }
  22422. }
  22423. }
  22424. if (directiveToken.type === "exported") {
  22425. body.forEach(function(e, idx) {
  22426. if (!e.length) {
  22427. // Ignore trailing comma
  22428. if (idx > 0 && idx === body.length - 1) {
  22429. return;
  22430. }
  22431. error("E002", directiveToken);
  22432. return;
  22433. }
  22434. state.funct["(scope)"].addExported(e);
  22435. });
  22436. }
  22437. if (directiveToken.type === "members") {
  22438. membersOnly = membersOnly || {};
  22439. body.forEach(function(m) {
  22440. var ch1 = m.charAt(0);
  22441. var ch2 = m.charAt(m.length - 1);
  22442. if (ch1 === ch2 && (ch1 === "\"" || ch1 === "'")) {
  22443. m = m
  22444. .substr(1, m.length - 2)
  22445. .replace("\\\"", "\"");
  22446. }
  22447. membersOnly[m] = false;
  22448. });
  22449. }
  22450. var numvals = [
  22451. "maxstatements",
  22452. "maxparams",
  22453. "maxdepth",
  22454. "maxcomplexity",
  22455. "maxerr",
  22456. "maxlen",
  22457. "indent"
  22458. ];
  22459. if (directiveToken.type === "jshint" || directiveToken.type === "jslint") {
  22460. body.forEach(function(g) {
  22461. g = g.split(":");
  22462. var key = g[0].trim();
  22463. var val = (g[1] || "").trim();
  22464. if (!checkOption(key, directiveToken)) {
  22465. return;
  22466. }
  22467. if (numvals.indexOf(key) >= 0) {
  22468. // GH988 - numeric options can be disabled by setting them to `false`
  22469. if (val !== "false") {
  22470. val = +val;
  22471. if (typeof val !== "number" || !isFinite(val) || val <= 0 || Math.floor(val) !== val) {
  22472. error("E032", directiveToken, g[1].trim());
  22473. return;
  22474. }
  22475. state.option[key] = val;
  22476. } else {
  22477. state.option[key] = key === "indent" ? 4 : false;
  22478. }
  22479. return;
  22480. }
  22481. if (key === "validthis") {
  22482. // `validthis` is valid only within a function scope.
  22483. if (state.funct["(global)"])
  22484. return void error("E009");
  22485. if (val !== "true" && val !== "false")
  22486. return void error("E002", directiveToken);
  22487. state.option.validthis = (val === "true");
  22488. return;
  22489. }
  22490. if (key === "quotmark") {
  22491. switch (val) {
  22492. case "true":
  22493. case "false":
  22494. state.option.quotmark = (val === "true");
  22495. break;
  22496. case "double":
  22497. case "single":
  22498. state.option.quotmark = val;
  22499. break;
  22500. default:
  22501. error("E002", directiveToken);
  22502. }
  22503. return;
  22504. }
  22505. if (key === "shadow") {
  22506. switch (val) {
  22507. case "true":
  22508. state.option.shadow = true;
  22509. break;
  22510. case "outer":
  22511. state.option.shadow = "outer";
  22512. break;
  22513. case "false":
  22514. case "inner":
  22515. state.option.shadow = "inner";
  22516. break;
  22517. default:
  22518. error("E002", directiveToken);
  22519. }
  22520. return;
  22521. }
  22522. if (key === "unused") {
  22523. switch (val) {
  22524. case "true":
  22525. state.option.unused = true;
  22526. break;
  22527. case "false":
  22528. state.option.unused = false;
  22529. break;
  22530. case "vars":
  22531. case "strict":
  22532. state.option.unused = val;
  22533. break;
  22534. default:
  22535. error("E002", directiveToken);
  22536. }
  22537. return;
  22538. }
  22539. if (key === "latedef") {
  22540. switch (val) {
  22541. case "true":
  22542. state.option.latedef = true;
  22543. break;
  22544. case "false":
  22545. state.option.latedef = false;
  22546. break;
  22547. case "nofunc":
  22548. state.option.latedef = "nofunc";
  22549. break;
  22550. default:
  22551. error("E002", directiveToken);
  22552. }
  22553. return;
  22554. }
  22555. if (key === "ignore") {
  22556. switch (val) {
  22557. case "line":
  22558. state.ignoredLines[directiveToken.line] = true;
  22559. removeIgnoredMessages();
  22560. break;
  22561. default:
  22562. error("E002", directiveToken);
  22563. }
  22564. return;
  22565. }
  22566. if (key === "strict") {
  22567. switch (val) {
  22568. case "true":
  22569. state.option.strict = true;
  22570. break;
  22571. case "false":
  22572. state.option.strict = false;
  22573. break;
  22574. case "global":
  22575. case "implied":
  22576. state.option.strict = val;
  22577. break;
  22578. default:
  22579. error("E002", directiveToken);
  22580. }
  22581. return;
  22582. }
  22583. if (key === "module") {
  22584. /**
  22585. * TODO: Extend this restriction to *all* "environmental" options.
  22586. */
  22587. if (!hasParsedCode(state.funct)) {
  22588. error("E055", directiveToken, "module");
  22589. }
  22590. }
  22591. if (key === "esversion") {
  22592. switch (val) {
  22593. case "3":
  22594. case "5":
  22595. case "6":
  22596. case "2015":
  22597. state.option.moz = false;
  22598. state.option.esversion = +val;
  22599. break;
  22600. default:
  22601. error("E002", directiveToken);
  22602. }
  22603. if (!hasParsedCode(state.funct)) {
  22604. error("E055", directiveToken, "esversion");
  22605. }
  22606. return;
  22607. }
  22608. var match = /^([+-])(W\d{3})$/g.exec(key);
  22609. if (match) {
  22610. // ignore for -W..., unignore for +W...
  22611. state.ignored[match[2]] = (match[1] === "-");
  22612. return;
  22613. }
  22614. var tn;
  22615. if (val === "true" || val === "false") {
  22616. if (directiveToken.type === "jslint") {
  22617. tn = options.renamed[key] || key;
  22618. state.option[tn] = (val === "true");
  22619. if (options.inverted[tn] !== undefined) {
  22620. state.option[tn] = !state.option[tn];
  22621. }
  22622. } else {
  22623. state.option[key] = (val === "true");
  22624. }
  22625. return;
  22626. }
  22627. error("E002", directiveToken);
  22628. });
  22629. applyOptions();
  22630. }
  22631. }
  22632. /**
  22633. * Return a token beyond the token available in `state.tokens.next`. If no
  22634. * such token exists, return the "(end)" token. This function is used to
  22635. * determine parsing strategies in cases where the value of the next token
  22636. * does not provide sufficient information, as is the case with `for` loops,
  22637. * e.g.:
  22638. *
  22639. * for ( var i in ...
  22640. *
  22641. * versus:
  22642. *
  22643. * for ( var i = ...
  22644. *
  22645. * @param {number} [p] - offset of desired token; defaults to 0
  22646. *
  22647. * @returns {token}
  22648. */
  22649. function peek(p) {
  22650. var i = p || 0, j = lookahead.length, t;
  22651. if (i < j) {
  22652. return lookahead[i];
  22653. }
  22654. while (j <= i) {
  22655. t = lex.token();
  22656. // When the lexer is exhausted, this function should produce the "(end)"
  22657. // token, even in cases where the requested token is beyond the end of
  22658. // the input stream.
  22659. if (!t) {
  22660. // If the lookahead buffer is empty, the expected "(end)" token was
  22661. // already emitted by the most recent invocation of `advance` and is
  22662. // available as the next token.
  22663. if (!lookahead.length) {
  22664. return state.tokens.next;
  22665. }
  22666. return lookahead[j - 1];
  22667. }
  22668. lookahead[j] = t;
  22669. j += 1;
  22670. }
  22671. return t;
  22672. }
  22673. function peekIgnoreEOL() {
  22674. var i = 0;
  22675. var t;
  22676. do {
  22677. t = peek(i++);
  22678. } while (t.id === "(endline)");
  22679. return t;
  22680. }
  22681. // Produce the next token. It looks for programming errors.
  22682. function advance(id, t) {
  22683. switch (state.tokens.curr.id) {
  22684. case "(number)":
  22685. if (state.tokens.next.id === ".") {
  22686. warning("W005", state.tokens.curr);
  22687. }
  22688. break;
  22689. case "-":
  22690. if (state.tokens.next.id === "-" || state.tokens.next.id === "--") {
  22691. warning("W006");
  22692. }
  22693. break;
  22694. case "+":
  22695. if (state.tokens.next.id === "+" || state.tokens.next.id === "++") {
  22696. warning("W007");
  22697. }
  22698. break;
  22699. }
  22700. if (id && state.tokens.next.id !== id) {
  22701. if (t) {
  22702. if (state.tokens.next.id === "(end)") {
  22703. error("E019", t, t.id);
  22704. } else {
  22705. error("E020", state.tokens.next, id, t.id, t.line, state.tokens.next.value);
  22706. }
  22707. } else if (state.tokens.next.type !== "(identifier)" || state.tokens.next.value !== id) {
  22708. warning("W116", state.tokens.next, id, state.tokens.next.value);
  22709. }
  22710. }
  22711. state.tokens.prev = state.tokens.curr;
  22712. state.tokens.curr = state.tokens.next;
  22713. for (;;) {
  22714. state.tokens.next = lookahead.shift() || lex.token();
  22715. if (!state.tokens.next) { // No more tokens left, give up
  22716. quit("E041", state.tokens.curr);
  22717. }
  22718. if (state.tokens.next.id === "(end)" || state.tokens.next.id === "(error)") {
  22719. return;
  22720. }
  22721. if (state.tokens.next.check) {
  22722. state.tokens.next.check();
  22723. }
  22724. if (state.tokens.next.isSpecial) {
  22725. lintingDirective(state.tokens.next, state.tokens.curr);
  22726. } else {
  22727. if (state.tokens.next.id !== "(endline)") {
  22728. break;
  22729. }
  22730. }
  22731. }
  22732. }
  22733. /**
  22734. * Determine whether a given token is an operator.
  22735. *
  22736. * @param {token} token
  22737. *
  22738. * @returns {boolean}
  22739. */
  22740. function isOperator(token) {
  22741. return token.first || token.right || token.left || token.id === "yield";
  22742. }
  22743. function isEndOfExpr(curr, next) {
  22744. if (arguments.length === 0) {
  22745. curr = state.tokens.curr;
  22746. next = state.tokens.next;
  22747. }
  22748. if (next.id === ";" || next.id === "}" || next.id === ":") {
  22749. return true;
  22750. }
  22751. if (next.infix === curr.infix || curr.ltBoundary === "after" ||
  22752. next.ltBoundary === "before") {
  22753. return curr.line !== startLine(next);
  22754. }
  22755. return false;
  22756. }
  22757. // This is the heart of JSHINT, the Pratt parser. In addition to parsing, it
  22758. // is looking for ad hoc lint patterns. We add .fud to Pratt's model, which is
  22759. // like .nud except that it is only used on the first token of a statement.
  22760. // Having .fud makes it much easier to define statement-oriented languages like
  22761. // JavaScript. I retained Pratt's nomenclature.
  22762. // .nud Null denotation
  22763. // .fud First null denotation
  22764. // .led Left denotation
  22765. // lbp Left binding power
  22766. // rbp Right binding power
  22767. // They are elements of the parsing method called Top Down Operator Precedence.
  22768. function expression(rbp, initial) {
  22769. var left, isArray = false, isObject = false, isLetExpr = false;
  22770. state.nameStack.push();
  22771. // if current expression is a let expression
  22772. if (!initial && state.tokens.next.value === "let" && peek(0).value === "(") {
  22773. if (!state.inMoz()) {
  22774. warning("W118", state.tokens.next, "let expressions");
  22775. }
  22776. isLetExpr = true;
  22777. // create a new block scope we use only for the current expression
  22778. state.funct["(scope)"].stack();
  22779. advance("let");
  22780. advance("(");
  22781. state.tokens.prev.fud();
  22782. advance(")");
  22783. }
  22784. if (state.tokens.next.id === "(end)")
  22785. error("E006", state.tokens.curr);
  22786. advance();
  22787. if (initial) {
  22788. state.funct["(verb)"] = state.tokens.curr.value;
  22789. state.tokens.curr.beginsStmt = true;
  22790. }
  22791. if (initial === true && state.tokens.curr.fud) {
  22792. left = state.tokens.curr.fud();
  22793. } else {
  22794. if (state.tokens.curr.nud) {
  22795. left = state.tokens.curr.nud(rbp);
  22796. } else {
  22797. error("E030", state.tokens.curr, state.tokens.curr.id);
  22798. }
  22799. while (rbp < state.tokens.next.lbp && !isEndOfExpr()) {
  22800. isArray = state.tokens.curr.value === "Array";
  22801. isObject = state.tokens.curr.value === "Object";
  22802. // #527, new Foo.Array(), Foo.Array(), new Foo.Object(), Foo.Object()
  22803. // Line breaks in IfStatement heads exist to satisfy the checkJSHint
  22804. // "Line too long." error.
  22805. if (left && (left.value || (left.first && left.first.value))) {
  22806. // If the left.value is not "new", or the left.first.value is a "."
  22807. // then safely assume that this is not "new Array()" and possibly
  22808. // not "new Object()"...
  22809. if (left.value !== "new" ||
  22810. (left.first && left.first.value && left.first.value === ".")) {
  22811. isArray = false;
  22812. // ...In the case of Object, if the left.value and state.tokens.curr.value
  22813. // are not equal, then safely assume that this not "new Object()"
  22814. if (left.value !== state.tokens.curr.value) {
  22815. isObject = false;
  22816. }
  22817. }
  22818. }
  22819. advance();
  22820. if (isArray && state.tokens.curr.id === "(" && state.tokens.next.id === ")") {
  22821. warning("W009", state.tokens.curr);
  22822. }
  22823. if (isObject && state.tokens.curr.id === "(" && state.tokens.next.id === ")") {
  22824. warning("W010", state.tokens.curr);
  22825. }
  22826. if (left && state.tokens.curr.led) {
  22827. left = state.tokens.curr.led(left);
  22828. } else {
  22829. error("E033", state.tokens.curr, state.tokens.curr.id);
  22830. }
  22831. }
  22832. }
  22833. if (isLetExpr) {
  22834. state.funct["(scope)"].unstack();
  22835. }
  22836. state.nameStack.pop();
  22837. return left;
  22838. }
  22839. // Functions for conformance of style.
  22840. function startLine(token) {
  22841. return token.startLine || token.line;
  22842. }
  22843. function nobreaknonadjacent(left, right) {
  22844. if (!state.option.laxbreak && left.line !== startLine(right)) {
  22845. warning("W014", right, right.value);
  22846. }
  22847. }
  22848. function nolinebreak(t) {
  22849. t = t;
  22850. if (t.line !== startLine(state.tokens.next)) {
  22851. warning("E022", t, t.value);
  22852. }
  22853. }
  22854. function nobreakcomma(left, right) {
  22855. if (left.line !== startLine(right)) {
  22856. if (!state.option.laxcomma) {
  22857. if (parseComma.first) {
  22858. warning("I001");
  22859. parseComma.first = false;
  22860. }
  22861. warning("W014", left, right.value);
  22862. }
  22863. }
  22864. }
  22865. function parseComma(opts) {
  22866. opts = opts || {};
  22867. if (!opts.peek) {
  22868. nobreakcomma(state.tokens.curr, state.tokens.next);
  22869. advance(",");
  22870. } else {
  22871. nobreakcomma(state.tokens.prev, state.tokens.curr);
  22872. }
  22873. if (state.tokens.next.identifier && !(opts.property && state.inES5())) {
  22874. // Keywords that cannot follow a comma operator.
  22875. switch (state.tokens.next.value) {
  22876. case "break":
  22877. case "case":
  22878. case "catch":
  22879. case "continue":
  22880. case "default":
  22881. case "do":
  22882. case "else":
  22883. case "finally":
  22884. case "for":
  22885. case "if":
  22886. case "in":
  22887. case "instanceof":
  22888. case "return":
  22889. case "switch":
  22890. case "throw":
  22891. case "try":
  22892. case "var":
  22893. case "let":
  22894. case "while":
  22895. case "with":
  22896. error("E024", state.tokens.next, state.tokens.next.value);
  22897. return false;
  22898. }
  22899. }
  22900. if (state.tokens.next.type === "(punctuator)") {
  22901. switch (state.tokens.next.value) {
  22902. case "}":
  22903. case "]":
  22904. case ",":
  22905. if (opts.allowTrailing) {
  22906. return true;
  22907. }
  22908. /* falls through */
  22909. case ")":
  22910. error("E024", state.tokens.next, state.tokens.next.value);
  22911. return false;
  22912. }
  22913. }
  22914. return true;
  22915. }
  22916. // Functional constructors for making the symbols that will be inherited by
  22917. // tokens.
  22918. function symbol(s, p) {
  22919. var x = state.syntax[s];
  22920. if (!x || typeof x !== "object") {
  22921. state.syntax[s] = x = {
  22922. id: s,
  22923. lbp: p,
  22924. value: s
  22925. };
  22926. }
  22927. return x;
  22928. }
  22929. function delim(s) {
  22930. var x = symbol(s, 0);
  22931. x.delim = true;
  22932. return x;
  22933. }
  22934. function stmt(s, f) {
  22935. var x = delim(s);
  22936. x.identifier = x.reserved = true;
  22937. x.fud = f;
  22938. return x;
  22939. }
  22940. function blockstmt(s, f) {
  22941. var x = stmt(s, f);
  22942. x.block = true;
  22943. return x;
  22944. }
  22945. function reserveName(x) {
  22946. var c = x.id.charAt(0);
  22947. if ((c >= "a" && c <= "z") || (c >= "A" && c <= "Z")) {
  22948. x.identifier = x.reserved = true;
  22949. }
  22950. return x;
  22951. }
  22952. function prefix(s, f) {
  22953. var x = symbol(s, 150);
  22954. reserveName(x);
  22955. x.nud = (typeof f === "function") ? f : function() {
  22956. this.arity = "unary";
  22957. this.right = expression(150);
  22958. if (this.id === "++" || this.id === "--") {
  22959. if (state.option.plusplus) {
  22960. warning("W016", this, this.id);
  22961. }
  22962. if (this.right) {
  22963. checkLeftSideAssign(this.right, this);
  22964. }
  22965. }
  22966. return this;
  22967. };
  22968. return x;
  22969. }
  22970. function type(s, f) {
  22971. var x = delim(s);
  22972. x.type = s;
  22973. x.nud = f;
  22974. return x;
  22975. }
  22976. function reserve(name, func) {
  22977. var x = type(name, func);
  22978. x.identifier = true;
  22979. x.reserved = true;
  22980. return x;
  22981. }
  22982. function FutureReservedWord(name, meta) {
  22983. var x = type(name, (meta && meta.nud) || function() {
  22984. return this;
  22985. });
  22986. meta = meta || {};
  22987. meta.isFutureReservedWord = true;
  22988. x.value = name;
  22989. x.identifier = true;
  22990. x.reserved = true;
  22991. x.meta = meta;
  22992. return x;
  22993. }
  22994. function reservevar(s, v) {
  22995. return reserve(s, function() {
  22996. if (typeof v === "function") {
  22997. v(this);
  22998. }
  22999. return this;
  23000. });
  23001. }
  23002. function infix(s, f, p, w) {
  23003. var x = symbol(s, p);
  23004. reserveName(x);
  23005. x.infix = true;
  23006. x.led = function(left) {
  23007. if (!w) {
  23008. nobreaknonadjacent(state.tokens.prev, state.tokens.curr);
  23009. }
  23010. if ((s === "in" || s === "instanceof") && left.id === "!") {
  23011. warning("W018", left, "!");
  23012. }
  23013. if (typeof f === "function") {
  23014. return f(left, this);
  23015. } else {
  23016. this.left = left;
  23017. this.right = expression(p);
  23018. return this;
  23019. }
  23020. };
  23021. return x;
  23022. }
  23023. function application(s) {
  23024. var x = symbol(s, 42);
  23025. x.infix = true;
  23026. x.led = function(left) {
  23027. nobreaknonadjacent(state.tokens.prev, state.tokens.curr);
  23028. this.left = left;
  23029. this.right = doFunction({ type: "arrow", loneArg: left });
  23030. return this;
  23031. };
  23032. return x;
  23033. }
  23034. function relation(s, f) {
  23035. var x = symbol(s, 100);
  23036. x.infix = true;
  23037. x.led = function(left) {
  23038. nobreaknonadjacent(state.tokens.prev, state.tokens.curr);
  23039. this.left = left;
  23040. var right = this.right = expression(100);
  23041. if (isIdentifier(left, "NaN") || isIdentifier(right, "NaN")) {
  23042. warning("W019", this);
  23043. } else if (f) {
  23044. f.apply(this, [left, right]);
  23045. }
  23046. if (!left || !right) {
  23047. quit("E041", state.tokens.curr);
  23048. }
  23049. if (left.id === "!") {
  23050. warning("W018", left, "!");
  23051. }
  23052. if (right.id === "!") {
  23053. warning("W018", right, "!");
  23054. }
  23055. return this;
  23056. };
  23057. return x;
  23058. }
  23059. var typeofValues = {};
  23060. typeofValues.legacy = [
  23061. // E4X extended the `typeof` operator to return "xml" for the XML and
  23062. // XMLList types it introduced.
  23063. // Ref: 11.3.2 The typeof Operator
  23064. // http://www.ecma-international.org/publications/files/ECMA-ST/Ecma-357.pdf
  23065. "xml",
  23066. // IE<9 reports "unknown" when the `typeof` operator is applied to an
  23067. // object existing across a COM+ bridge. In lieu of official documentation
  23068. // (which does not exist), see:
  23069. // http://robertnyman.com/2005/12/21/what-is-typeof-unknown/
  23070. "unknown"
  23071. ];
  23072. typeofValues.es3 = [
  23073. "undefined", "boolean", "number", "string", "function", "object",
  23074. ];
  23075. typeofValues.es3 = typeofValues.es3.concat(typeofValues.legacy);
  23076. typeofValues.es6 = typeofValues.es3.concat("symbol");
  23077. // Checks whether the 'typeof' operator is used with the correct
  23078. // value. For docs on 'typeof' see:
  23079. // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/typeof
  23080. function isTypoTypeof(left, right, state) {
  23081. var values;
  23082. if (state.option.notypeof)
  23083. return false;
  23084. if (!left || !right)
  23085. return false;
  23086. values = state.inES6() ? typeofValues.es6 : typeofValues.es3;
  23087. if (right.type === "(identifier)" && right.value === "typeof" && left.type === "(string)")
  23088. return !_.includes(values, left.value);
  23089. return false;
  23090. }
  23091. function isGlobalEval(left, state) {
  23092. var isGlobal = false;
  23093. // permit methods to refer to an "eval" key in their own context
  23094. if (left.type === "this" && state.funct["(context)"] === null) {
  23095. isGlobal = true;
  23096. }
  23097. // permit use of "eval" members of objects
  23098. else if (left.type === "(identifier)") {
  23099. if (state.option.node && left.value === "global") {
  23100. isGlobal = true;
  23101. }
  23102. else if (state.option.browser && (left.value === "window" || left.value === "document")) {
  23103. isGlobal = true;
  23104. }
  23105. }
  23106. return isGlobal;
  23107. }
  23108. function findNativePrototype(left) {
  23109. var natives = [
  23110. "Array", "ArrayBuffer", "Boolean", "Collator", "DataView", "Date",
  23111. "DateTimeFormat", "Error", "EvalError", "Float32Array", "Float64Array",
  23112. "Function", "Infinity", "Intl", "Int16Array", "Int32Array", "Int8Array",
  23113. "Iterator", "Number", "NumberFormat", "Object", "RangeError",
  23114. "ReferenceError", "RegExp", "StopIteration", "String", "SyntaxError",
  23115. "TypeError", "Uint16Array", "Uint32Array", "Uint8Array", "Uint8ClampedArray",
  23116. "URIError"
  23117. ];
  23118. function walkPrototype(obj) {
  23119. if (typeof obj !== "object") return;
  23120. return obj.right === "prototype" ? obj : walkPrototype(obj.left);
  23121. }
  23122. function walkNative(obj) {
  23123. while (!obj.identifier && typeof obj.left === "object")
  23124. obj = obj.left;
  23125. if (obj.identifier && natives.indexOf(obj.value) >= 0 &&
  23126. state.funct["(scope)"].isPredefined(obj.value)) {
  23127. return obj.value;
  23128. }
  23129. }
  23130. var prototype = walkPrototype(left);
  23131. if (prototype) return walkNative(prototype);
  23132. }
  23133. /**
  23134. * Checks the left hand side of an assignment for issues, returns if ok
  23135. * @param {token} left - the left hand side of the assignment
  23136. * @param {token=} assignToken - the token for the assignment, used for reporting
  23137. * @param {object=} options - optional object
  23138. * @param {boolean} options.allowDestructuring - whether to allow destructuting binding
  23139. * @returns {boolean} Whether the left hand side is OK
  23140. */
  23141. function checkLeftSideAssign(left, assignToken, options) {
  23142. var allowDestructuring = options && options.allowDestructuring;
  23143. assignToken = assignToken || left;
  23144. if (state.option.freeze) {
  23145. var nativeObject = findNativePrototype(left);
  23146. if (nativeObject)
  23147. warning("W121", left, nativeObject);
  23148. }
  23149. if (checkPunctuator(left, "...")) {
  23150. left = left.right;
  23151. }
  23152. if (left.identifier && !left.isMetaProperty) {
  23153. // reassign also calls modify
  23154. // but we are specific in order to catch function re-assignment
  23155. // and globals re-assignment
  23156. state.funct["(scope)"].block.reassign(left.value, left);
  23157. }
  23158. if (left.id === ".") {
  23159. if (!left.left || left.left.value === "arguments" && !state.isStrict()) {
  23160. warning("W143", assignToken);
  23161. }
  23162. state.nameStack.set(state.tokens.prev);
  23163. return true;
  23164. } else if (left.id === "{" || left.id === "[") {
  23165. if (!allowDestructuring || !left.destructAssign) {
  23166. if (left.id === "{" || !left.left) {
  23167. warning("E031", assignToken);
  23168. } else if (left.left.value === "arguments" && !state.isStrict()) {
  23169. warning("W143", assignToken);
  23170. }
  23171. }
  23172. if (left.id === "[") {
  23173. state.nameStack.set(left.right);
  23174. }
  23175. return true;
  23176. } else if (left.identifier && !isReserved(left) && !left.isMetaProperty &&
  23177. left.value !== "eval" && left.value !== "arguments") {
  23178. if (state.funct["(scope)"].labeltype(left.value) === "exception") {
  23179. warning("W022", left);
  23180. }
  23181. state.nameStack.set(left);
  23182. return true;
  23183. }
  23184. error("E031", assignToken);
  23185. return false;
  23186. }
  23187. function assignop(s, f, p) {
  23188. var x = infix(s, typeof f === "function" ? f : function(left, that) {
  23189. that.left = left;
  23190. checkLeftSideAssign(left, that, { allowDestructuring: true });
  23191. that.right = expression(10);
  23192. return that;
  23193. }, p);
  23194. x.exps = true;
  23195. x.assign = true;
  23196. return x;
  23197. }
  23198. function bitwise(s, f, p) {
  23199. var x = symbol(s, p);
  23200. reserveName(x);
  23201. x.infix = true;
  23202. x.led = (typeof f === "function") ? f : function(left) {
  23203. if (state.option.bitwise) {
  23204. warning("W016", this, this.id);
  23205. }
  23206. this.left = left;
  23207. this.right = expression(p);
  23208. return this;
  23209. };
  23210. return x;
  23211. }
  23212. function bitwiseassignop(s) {
  23213. return assignop(s, function(left, that) {
  23214. if (state.option.bitwise) {
  23215. warning("W016", that, that.id);
  23216. }
  23217. checkLeftSideAssign(left, that);
  23218. that.right = expression(10);
  23219. return that;
  23220. }, 20);
  23221. }
  23222. function suffix(s) {
  23223. var x = symbol(s, 150);
  23224. x.led = function(left) {
  23225. // this = suffix e.g. "++" punctuator
  23226. // left = symbol operated e.g. "a" identifier or "a.b" punctuator
  23227. if (state.option.plusplus) {
  23228. warning("W016", this, this.id);
  23229. }
  23230. checkLeftSideAssign(left, this);
  23231. this.left = left;
  23232. return this;
  23233. };
  23234. return x;
  23235. }
  23236. // prop means that this identifier is that of an object property
  23237. function optionalidentifier(prop, preserve) {
  23238. if (!state.tokens.next.identifier) {
  23239. return;
  23240. }
  23241. if (!preserve) {
  23242. advance();
  23243. }
  23244. var curr = state.tokens.curr;
  23245. var val = state.tokens.curr.value;
  23246. if (!isReserved(curr)) {
  23247. return val;
  23248. }
  23249. if (prop) {
  23250. if (state.inES5()) {
  23251. return val;
  23252. }
  23253. }
  23254. warning("W024", state.tokens.curr, state.tokens.curr.id);
  23255. return val;
  23256. }
  23257. // prop means that this identifier is that of an object property
  23258. function identifier(prop) {
  23259. var i = optionalidentifier(prop, false);
  23260. if (i) {
  23261. return i;
  23262. }
  23263. // parameter destructuring with rest operator
  23264. if (state.tokens.next.value === "...") {
  23265. if (!state.inES6(true)) {
  23266. warning("W119", state.tokens.next, "spread/rest operator", "6");
  23267. }
  23268. advance();
  23269. if (checkPunctuator(state.tokens.next, "...")) {
  23270. warning("E024", state.tokens.next, "...");
  23271. while (checkPunctuator(state.tokens.next, "...")) {
  23272. advance();
  23273. }
  23274. }
  23275. if (!state.tokens.next.identifier) {
  23276. warning("E024", state.tokens.curr, state.tokens.next.id);
  23277. return;
  23278. }
  23279. return identifier(prop);
  23280. } else {
  23281. error("E030", state.tokens.next, state.tokens.next.value);
  23282. // The token should be consumed after a warning is issued so the parser
  23283. // can continue as though an identifier were found. The semicolon token
  23284. // should not be consumed in this way so that the parser interprets it as
  23285. // a statement delimeter;
  23286. if (state.tokens.next.id !== ";") {
  23287. advance();
  23288. }
  23289. }
  23290. }
  23291. function reachable(controlToken) {
  23292. var i = 0, t;
  23293. if (state.tokens.next.id !== ";" || controlToken.inBracelessBlock) {
  23294. return;
  23295. }
  23296. for (;;) {
  23297. do {
  23298. t = peek(i);
  23299. i += 1;
  23300. } while (t.id !== "(end)" && t.id === "(comment)");
  23301. if (t.reach) {
  23302. return;
  23303. }
  23304. if (t.id !== "(endline)") {
  23305. if (t.id === "function") {
  23306. if (state.option.latedef === true) {
  23307. warning("W026", t);
  23308. }
  23309. break;
  23310. }
  23311. warning("W027", t, t.value, controlToken.value);
  23312. break;
  23313. }
  23314. }
  23315. }
  23316. /**
  23317. * Consume the semicolon that delimits the statement currently being parsed,
  23318. * emitting relevant warnings/errors as appropriate.
  23319. *
  23320. * @param {token} stmt - token describing the statement under consideration
  23321. */
  23322. function parseFinalSemicolon(stmt) {
  23323. if (state.tokens.next.id !== ";") {
  23324. // don't complain about unclosed templates / strings
  23325. if (state.tokens.next.isUnclosed) return advance();
  23326. var sameLine = startLine(state.tokens.next) === state.tokens.curr.line &&
  23327. state.tokens.next.id !== "(end)";
  23328. var blockEnd = checkPunctuator(state.tokens.next, "}");
  23329. if (sameLine && !blockEnd && !(stmt.id === "do" && state.inES6(true))) {
  23330. errorAt("E058", state.tokens.curr.line, state.tokens.curr.character);
  23331. } else if (!state.option.asi) {
  23332. // If this is the last statement in a block that ends on
  23333. // the same line *and* option lastsemic is on, ignore the warning.
  23334. // Otherwise, complain about missing semicolon.
  23335. if (!(blockEnd && sameLine && state.option.lastsemic)) {
  23336. warningAt("W033", state.tokens.curr.line, state.tokens.curr.character);
  23337. }
  23338. }
  23339. } else {
  23340. advance(";");
  23341. }
  23342. }
  23343. function statement() {
  23344. var i = indent, r, t = state.tokens.next, hasOwnScope = false;
  23345. if (t.id === ";") {
  23346. advance(";");
  23347. return;
  23348. }
  23349. // Is this a labelled statement?
  23350. var res = isReserved(t);
  23351. // We're being more tolerant here: if someone uses
  23352. // a FutureReservedWord as a label, we warn but proceed
  23353. // anyway.
  23354. if (res && t.meta && t.meta.isFutureReservedWord && peek().id === ":") {
  23355. warning("W024", t, t.id);
  23356. res = false;
  23357. }
  23358. if (t.identifier && !res && peek().id === ":") {
  23359. advance();
  23360. advance(":");
  23361. hasOwnScope = true;
  23362. state.funct["(scope)"].stack();
  23363. state.funct["(scope)"].block.addBreakLabel(t.value, { token: state.tokens.curr });
  23364. if (!state.tokens.next.labelled && state.tokens.next.value !== "{") {
  23365. warning("W028", state.tokens.next, t.value, state.tokens.next.value);
  23366. }
  23367. t = state.tokens.next;
  23368. }
  23369. // Is it a lonely block?
  23370. if (t.id === "{") {
  23371. // Is it a switch case block?
  23372. //
  23373. // switch (foo) {
  23374. // case bar: { <= here.
  23375. // ...
  23376. // }
  23377. // }
  23378. var iscase = (state.funct["(verb)"] === "case" && state.tokens.curr.value === ":");
  23379. block(true, true, false, false, iscase);
  23380. if (hasOwnScope) {
  23381. state.funct["(scope)"].unstack();
  23382. }
  23383. return;
  23384. }
  23385. // Parse the statement.
  23386. r = expression(0, true);
  23387. if (r && !(r.identifier && r.value === "function") &&
  23388. !(r.type === "(punctuator)" && r.left &&
  23389. r.left.identifier && r.left.value === "function")) {
  23390. if (!state.isStrict() && state.stmtMissingStrict()) {
  23391. warning("E007");
  23392. }
  23393. }
  23394. // Look for the final semicolon.
  23395. if (!t.block) {
  23396. if (!state.option.expr && (!r || !r.exps)) {
  23397. warning("W030", state.tokens.curr);
  23398. } else if (state.option.nonew && r && r.left && r.id === "(" && r.left.id === "new") {
  23399. warning("W031", t);
  23400. }
  23401. parseFinalSemicolon(t);
  23402. }
  23403. // Restore the indentation.
  23404. indent = i;
  23405. if (hasOwnScope) {
  23406. state.funct["(scope)"].unstack();
  23407. }
  23408. return r;
  23409. }
  23410. function statements() {
  23411. var a = [], p;
  23412. while (!state.tokens.next.reach && state.tokens.next.id !== "(end)") {
  23413. if (state.tokens.next.id === ";") {
  23414. p = peek();
  23415. if (!p || (p.id !== "(" && p.id !== "[")) {
  23416. warning("W032");
  23417. }
  23418. advance(";");
  23419. } else {
  23420. a.push(statement());
  23421. }
  23422. }
  23423. return a;
  23424. }
  23425. /*
  23426. * read all directives
  23427. */
  23428. function directives() {
  23429. var current = state.tokens.next;
  23430. while (state.tokens.next.id === "(string)") {
  23431. var next = peekIgnoreEOL();
  23432. if (!isEndOfExpr(current, next)) {
  23433. break;
  23434. }
  23435. current = next;
  23436. advance();
  23437. var directive = state.tokens.curr.value;
  23438. if (state.directive[directive] ||
  23439. (directive === "use strict" && state.option.strict === "implied")) {
  23440. warning("W034", state.tokens.curr, directive);
  23441. }
  23442. // there's no directive negation, so always set to true
  23443. state.directive[directive] = true;
  23444. parseFinalSemicolon(current);
  23445. }
  23446. if (state.isStrict()) {
  23447. state.option.undef = true;
  23448. }
  23449. }
  23450. /*
  23451. * Parses a single block. A block is a sequence of statements wrapped in
  23452. * braces.
  23453. *
  23454. * ordinary - true for everything but function bodies and try blocks.
  23455. * stmt - true if block can be a single statement (e.g. in if/for/while).
  23456. * isfunc - true if block is a function body
  23457. * isfatarrow - true if its a body of a fat arrow function
  23458. * iscase - true if block is a switch case block
  23459. */
  23460. function block(ordinary, stmt, isfunc, isfatarrow, iscase) {
  23461. var a,
  23462. b = inblock,
  23463. old_indent = indent,
  23464. m,
  23465. t,
  23466. d;
  23467. inblock = ordinary;
  23468. t = state.tokens.next;
  23469. var metrics = state.funct["(metrics)"];
  23470. metrics.nestedBlockDepth += 1;
  23471. metrics.verifyMaxNestedBlockDepthPerFunction();
  23472. if (state.tokens.next.id === "{") {
  23473. advance("{");
  23474. // create a new block scope
  23475. state.funct["(scope)"].stack();
  23476. state.funct["(noblockscopedvar)"] = false;
  23477. if (state.tokens.next.id !== "}") {
  23478. indent += state.option.indent;
  23479. while (!ordinary && state.tokens.next.from > indent) {
  23480. indent += state.option.indent;
  23481. }
  23482. if (isfunc) {
  23483. m = {};
  23484. for (d in state.directive) {
  23485. m[d] = state.directive[d];
  23486. }
  23487. directives();
  23488. state.funct["(isStrict)"] = state.isStrict();
  23489. if (state.option.strict && state.funct["(context)"]["(global)"]) {
  23490. if (!m["use strict"] && !state.isStrict()) {
  23491. warning("E007");
  23492. }
  23493. }
  23494. }
  23495. a = statements();
  23496. metrics.statementCount += a.length;
  23497. indent -= state.option.indent;
  23498. } else if (isfunc) {
  23499. // Ensure property is set for functions with empty bodies.
  23500. state.funct["(isStrict)"] = state.isStrict();
  23501. }
  23502. advance("}", t);
  23503. if (isfunc) {
  23504. state.funct["(scope)"].validateParams(isfatarrow);
  23505. if (m) {
  23506. state.directive = m;
  23507. }
  23508. }
  23509. state.funct["(scope)"].unstack();
  23510. indent = old_indent;
  23511. } else if (!ordinary) {
  23512. if (isfunc) {
  23513. state.funct["(scope)"].stack();
  23514. if (stmt && !isfatarrow && !state.inMoz()) {
  23515. error("W118", state.tokens.curr, "function closure expressions");
  23516. }
  23517. if (isfatarrow) {
  23518. state.funct["(scope)"].validateParams(true);
  23519. }
  23520. expression(10);
  23521. if (state.option.strict && state.funct["(context)"]["(global)"]) {
  23522. if (!state.isStrict()) {
  23523. warning("E007");
  23524. }
  23525. }
  23526. state.funct["(scope)"].unstack();
  23527. } else {
  23528. error("E021", state.tokens.next, "{", state.tokens.next.value);
  23529. }
  23530. } else {
  23531. // check to avoid let declaration not within a block
  23532. // though is fine inside for loop initializer section
  23533. state.funct["(noblockscopedvar)"] = state.tokens.next.id !== "for";
  23534. state.funct["(scope)"].stack();
  23535. if (!stmt || state.option.curly) {
  23536. warning("W116", state.tokens.next, "{", state.tokens.next.value);
  23537. }
  23538. state.tokens.next.inBracelessBlock = true;
  23539. indent += state.option.indent;
  23540. // test indentation only if statement is in new line
  23541. a = [statement()];
  23542. indent -= state.option.indent;
  23543. state.funct["(scope)"].unstack();
  23544. delete state.funct["(noblockscopedvar)"];
  23545. }
  23546. // Don't clear and let it propagate out if it is "break", "return" or similar in switch case
  23547. switch (state.funct["(verb)"]) {
  23548. case "break":
  23549. case "continue":
  23550. case "return":
  23551. case "throw":
  23552. if (iscase) {
  23553. break;
  23554. }
  23555. /* falls through */
  23556. default:
  23557. state.funct["(verb)"] = null;
  23558. }
  23559. inblock = b;
  23560. if (ordinary && state.option.noempty && (!a || a.length === 0)) {
  23561. warning("W035", state.tokens.prev);
  23562. }
  23563. metrics.nestedBlockDepth -= 1;
  23564. return a;
  23565. }
  23566. function countMember(m) {
  23567. if (membersOnly && typeof membersOnly[m] !== "boolean") {
  23568. warning("W036", state.tokens.curr, m);
  23569. }
  23570. if (typeof member[m] === "number") {
  23571. member[m] += 1;
  23572. } else {
  23573. member[m] = 1;
  23574. }
  23575. }
  23576. // Build the syntax table by declaring the syntactic elements of the language.
  23577. type("(number)", function() {
  23578. return this;
  23579. });
  23580. type("(string)", function() {
  23581. return this;
  23582. });
  23583. state.syntax["(identifier)"] = {
  23584. type: "(identifier)",
  23585. lbp: 0,
  23586. identifier: true,
  23587. nud: function() {
  23588. var v = this.value;
  23589. // If this identifier is the lone parameter to a shorthand "fat arrow"
  23590. // function definition, i.e.
  23591. //
  23592. // x => x;
  23593. //
  23594. // ...it should not be considered as a variable in the current scope. It
  23595. // will be added to the scope of the new function when the next token is
  23596. // parsed, so it can be safely ignored for now.
  23597. if (state.tokens.next.id === "=>") {
  23598. return this;
  23599. }
  23600. if (!state.funct["(comparray)"].check(v)) {
  23601. state.funct["(scope)"].block.use(v, state.tokens.curr);
  23602. }
  23603. return this;
  23604. },
  23605. led: function() {
  23606. error("E033", state.tokens.next, state.tokens.next.value);
  23607. }
  23608. };
  23609. var baseTemplateSyntax = {
  23610. identifier: false,
  23611. template: true,
  23612. };
  23613. state.syntax["(template)"] = _.extend({
  23614. lbp: 155,
  23615. type: "(template)",
  23616. nud: doTemplateLiteral,
  23617. led: doTemplateLiteral,
  23618. noSubst: false
  23619. }, baseTemplateSyntax);
  23620. state.syntax["(template middle)"] = _.extend({
  23621. lbp: 0,
  23622. type: "(template middle)",
  23623. noSubst: false
  23624. }, baseTemplateSyntax);
  23625. state.syntax["(template tail)"] = _.extend({
  23626. lbp: 0,
  23627. type: "(template tail)",
  23628. tail: true,
  23629. noSubst: false
  23630. }, baseTemplateSyntax);
  23631. state.syntax["(no subst template)"] = _.extend({
  23632. lbp: 155,
  23633. type: "(template)",
  23634. nud: doTemplateLiteral,
  23635. led: doTemplateLiteral,
  23636. noSubst: true,
  23637. tail: true // mark as tail, since it's always the last component
  23638. }, baseTemplateSyntax);
  23639. type("(regexp)", function() {
  23640. return this;
  23641. });
  23642. // ECMAScript parser
  23643. delim("(endline)");
  23644. (function(x) {
  23645. x.line = x.from = 0;
  23646. })(delim("(begin)"));
  23647. delim("(end)").reach = true;
  23648. delim("(error)").reach = true;
  23649. delim("}").reach = true;
  23650. delim(")");
  23651. delim("]");
  23652. delim("\"").reach = true;
  23653. delim("'").reach = true;
  23654. delim(";");
  23655. delim(":").reach = true;
  23656. delim("#");
  23657. reserve("else");
  23658. reserve("case").reach = true;
  23659. reserve("catch");
  23660. reserve("default").reach = true;
  23661. reserve("finally");
  23662. reserve("true", function() { return this; });
  23663. reserve("false", function() { return this; });
  23664. reservevar("null");
  23665. reservevar("this", function(x) {
  23666. if (state.isStrict() && !isMethod() &&
  23667. !state.option.validthis && ((state.funct["(statement)"] &&
  23668. state.funct["(name)"].charAt(0) > "Z") || state.funct["(global)"])) {
  23669. warning("W040", x);
  23670. }
  23671. });
  23672. assignop("=", "assign", 20);
  23673. assignop("+=", "assignadd", 20);
  23674. assignop("-=", "assignsub", 20);
  23675. assignop("*=", "assignmult", 20);
  23676. assignop("/=", "assigndiv", 20).nud = function() {
  23677. error("E014");
  23678. };
  23679. assignop("%=", "assignmod", 20);
  23680. bitwiseassignop("&=");
  23681. bitwiseassignop("|=");
  23682. bitwiseassignop("^=");
  23683. bitwiseassignop("<<=");
  23684. bitwiseassignop(">>=");
  23685. bitwiseassignop(">>>=");
  23686. infix(",", function(left, that) {
  23687. var expr;
  23688. that.exprs = [left];
  23689. if (state.option.nocomma) {
  23690. warning("W127");
  23691. }
  23692. if (!parseComma({ peek: true })) {
  23693. return that;
  23694. }
  23695. while (true) {
  23696. if (!(expr = expression(10))) {
  23697. break;
  23698. }
  23699. that.exprs.push(expr);
  23700. if (state.tokens.next.value !== "," || !parseComma()) {
  23701. break;
  23702. }
  23703. }
  23704. return that;
  23705. }, 10, true);
  23706. infix("?", function(left, that) {
  23707. increaseComplexityCount();
  23708. that.left = left;
  23709. that.right = expression(10);
  23710. advance(":");
  23711. expression(10);
  23712. return that;
  23713. }, 30);
  23714. var orPrecendence = 40;
  23715. infix("||", function(left, that) {
  23716. increaseComplexityCount();
  23717. that.left = left;
  23718. that.right = expression(orPrecendence);
  23719. return that;
  23720. }, orPrecendence);
  23721. infix("&&", "and", 50);
  23722. bitwise("|", "bitor", 70);
  23723. bitwise("^", "bitxor", 80);
  23724. bitwise("&", "bitand", 90);
  23725. relation("==", function(left, right) {
  23726. var eqnull = state.option.eqnull &&
  23727. ((left && left.value) === "null" || (right && right.value) === "null");
  23728. switch (true) {
  23729. case !eqnull && state.option.eqeqeq:
  23730. this.from = this.character;
  23731. warning("W116", this, "===", "==");
  23732. break;
  23733. case isTypoTypeof(right, left, state):
  23734. warning("W122", this, right.value);
  23735. break;
  23736. case isTypoTypeof(left, right, state):
  23737. warning("W122", this, left.value);
  23738. break;
  23739. }
  23740. return this;
  23741. });
  23742. relation("===", function(left, right) {
  23743. if (isTypoTypeof(right, left, state)) {
  23744. warning("W122", this, right.value);
  23745. } else if (isTypoTypeof(left, right, state)) {
  23746. warning("W122", this, left.value);
  23747. }
  23748. return this;
  23749. });
  23750. relation("!=", function(left, right) {
  23751. var eqnull = state.option.eqnull &&
  23752. ((left && left.value) === "null" || (right && right.value) === "null");
  23753. if (!eqnull && state.option.eqeqeq) {
  23754. this.from = this.character;
  23755. warning("W116", this, "!==", "!=");
  23756. } else if (isTypoTypeof(right, left, state)) {
  23757. warning("W122", this, right.value);
  23758. } else if (isTypoTypeof(left, right, state)) {
  23759. warning("W122", this, left.value);
  23760. }
  23761. return this;
  23762. });
  23763. relation("!==", function(left, right) {
  23764. if (isTypoTypeof(right, left, state)) {
  23765. warning("W122", this, right.value);
  23766. } else if (isTypoTypeof(left, right, state)) {
  23767. warning("W122", this, left.value);
  23768. }
  23769. return this;
  23770. });
  23771. relation("<");
  23772. relation(">");
  23773. relation("<=");
  23774. relation(">=");
  23775. bitwise("<<", "shiftleft", 120);
  23776. bitwise(">>", "shiftright", 120);
  23777. bitwise(">>>", "shiftrightunsigned", 120);
  23778. infix("in", "in", 120);
  23779. infix("instanceof", function(left, token) {
  23780. var right;
  23781. var scope = state.funct["(scope)"];
  23782. token.left = left;
  23783. token.right = right = expression(120);
  23784. // This condition reflects a syntax error which will be reported by the
  23785. // `expression` function.
  23786. if (!right) {
  23787. return token;
  23788. }
  23789. if (right.id === "(number)" ||
  23790. right.id === "(string)" ||
  23791. right.value === "null" ||
  23792. (right.value === "undefined" && !scope.has("undefined")) ||
  23793. right.arity === "unary" ||
  23794. right.id === "{" ||
  23795. (right.id === "[" && !right.right) ||
  23796. right.id === "(regexp)" ||
  23797. (right.id === "(template)" && !right.tag)) {
  23798. error("E060");
  23799. }
  23800. if (right.id === "function") {
  23801. warning("W139");
  23802. }
  23803. return token;
  23804. }, 120);
  23805. infix("+", function(left, that) {
  23806. var right;
  23807. that.left = left;
  23808. that.right = right = expression(130);
  23809. if (left && right && left.id === "(string)" && right.id === "(string)") {
  23810. left.value += right.value;
  23811. left.character = right.character;
  23812. if (!state.option.scripturl && reg.javascriptURL.test(left.value)) {
  23813. warning("W050", left);
  23814. }
  23815. return left;
  23816. }
  23817. return that;
  23818. }, 130);
  23819. prefix("+", "num");
  23820. infix("-", "sub", 130);
  23821. prefix("-", "neg");
  23822. infix("*", "mult", 140);
  23823. infix("/", "div", 140);
  23824. infix("%", "mod", 140);
  23825. suffix("++");
  23826. prefix("++", "preinc");
  23827. state.syntax["++"].exps = true;
  23828. state.syntax["++"].ltBoundary = "before";
  23829. suffix("--");
  23830. prefix("--", "predec");
  23831. state.syntax["--"].exps = true;
  23832. state.syntax["--"].ltBoundary = "before";
  23833. prefix("delete", function() {
  23834. var p = expression(10);
  23835. if (!p) {
  23836. return this;
  23837. }
  23838. if (p.id !== "." && p.id !== "[") {
  23839. warning("W051");
  23840. }
  23841. this.first = p;
  23842. // The `delete` operator accepts unresolvable references when not in strict
  23843. // mode, so the operand may be undefined.
  23844. if (p.identifier && !state.isStrict()) {
  23845. p.forgiveUndef = true;
  23846. }
  23847. return this;
  23848. }).exps = true;
  23849. prefix("~", function() {
  23850. if (state.option.bitwise) {
  23851. warning("W016", this, "~");
  23852. }
  23853. this.arity = "unary";
  23854. this.right = expression(150);
  23855. return this;
  23856. });
  23857. prefix("...", function() {
  23858. if (!state.inES6(true)) {
  23859. warning("W119", this, "spread/rest operator", "6");
  23860. }
  23861. // TODO: Allow all AssignmentExpression
  23862. // once parsing permits.
  23863. //
  23864. // How to handle eg. number, boolean when the built-in
  23865. // prototype of may have an @@iterator definition?
  23866. //
  23867. // Number.prototype[Symbol.iterator] = function * () {
  23868. // yield this.valueOf();
  23869. // };
  23870. //
  23871. // var a = [ ...1 ];
  23872. // console.log(a); // [1];
  23873. //
  23874. // for (let n of [...10]) {
  23875. // console.log(n);
  23876. // }
  23877. // // 10
  23878. //
  23879. //
  23880. // Boolean.prototype[Symbol.iterator] = function * () {
  23881. // yield this.valueOf();
  23882. // };
  23883. //
  23884. // var a = [ ...true ];
  23885. // console.log(a); // [true];
  23886. //
  23887. // for (let n of [...false]) {
  23888. // console.log(n);
  23889. // }
  23890. // // false
  23891. //
  23892. if (!state.tokens.next.identifier &&
  23893. state.tokens.next.type !== "(string)" &&
  23894. !checkPunctuators(state.tokens.next, ["[", "("])) {
  23895. error("E030", state.tokens.next, state.tokens.next.value);
  23896. }
  23897. this.right = expression(150);
  23898. return this;
  23899. });
  23900. prefix("!", function() {
  23901. this.arity = "unary";
  23902. this.right = expression(150);
  23903. if (!this.right) { // '!' followed by nothing? Give up.
  23904. quit("E041", this);
  23905. }
  23906. if (bang[this.right.id] === true) {
  23907. warning("W018", this, "!");
  23908. }
  23909. return this;
  23910. });
  23911. prefix("typeof", (function() {
  23912. var p = expression(150);
  23913. this.first = this.right = p;
  23914. if (!p) { // 'typeof' followed by nothing? Give up.
  23915. quit("E041", this);
  23916. }
  23917. // The `typeof` operator accepts unresolvable references, so the operand
  23918. // may be undefined.
  23919. if (p.identifier) {
  23920. p.forgiveUndef = true;
  23921. }
  23922. return this;
  23923. }));
  23924. prefix("new", function() {
  23925. var mp = metaProperty("target", function() {
  23926. if (!state.inES6(true)) {
  23927. warning("W119", state.tokens.prev, "new.target", "6");
  23928. }
  23929. var inFunction, c = state.funct;
  23930. while (c) {
  23931. inFunction = !c["(global)"];
  23932. if (!c["(arrow)"]) { break; }
  23933. c = c["(context)"];
  23934. }
  23935. if (!inFunction) {
  23936. warning("W136", state.tokens.prev, "new.target");
  23937. }
  23938. });
  23939. if (mp) { return mp; }
  23940. var c = expression(155), i;
  23941. if (c && c.id !== "function") {
  23942. if (c.identifier) {
  23943. switch (c.value) {
  23944. case "Number":
  23945. case "String":
  23946. case "Boolean":
  23947. case "Math":
  23948. case "JSON":
  23949. warning("W053", state.tokens.prev, c.value);
  23950. break;
  23951. case "Symbol":
  23952. if (state.inES6()) {
  23953. warning("W053", state.tokens.prev, c.value);
  23954. }
  23955. break;
  23956. case "Function":
  23957. if (!state.option.evil) {
  23958. warning("W054");
  23959. }
  23960. break;
  23961. case "Date":
  23962. case "RegExp":
  23963. case "this":
  23964. break;
  23965. default:
  23966. if (c.id !== "function") {
  23967. i = c.value.substr(0, 1);
  23968. if (state.option.newcap && (i < "A" || i > "Z") &&
  23969. !state.funct["(scope)"].isPredefined(c.value)) {
  23970. warning("W055", state.tokens.curr);
  23971. }
  23972. }
  23973. }
  23974. } else {
  23975. if (c.id !== "." && c.id !== "[" && c.id !== "(") {
  23976. warning("W056", state.tokens.curr);
  23977. }
  23978. }
  23979. } else {
  23980. if (!state.option.supernew)
  23981. warning("W057", this);
  23982. }
  23983. if (state.tokens.next.id !== "(" && !state.option.supernew) {
  23984. warning("W058", state.tokens.curr, state.tokens.curr.value);
  23985. }
  23986. this.first = this.right = c;
  23987. return this;
  23988. });
  23989. state.syntax["new"].exps = true;
  23990. prefix("void").exps = true;
  23991. infix(".", function(left, that) {
  23992. var m = identifier(true);
  23993. if (typeof m === "string") {
  23994. countMember(m);
  23995. }
  23996. that.left = left;
  23997. that.right = m;
  23998. if (m && m === "hasOwnProperty" && state.tokens.next.value === "=") {
  23999. warning("W001");
  24000. }
  24001. if (left && left.value === "arguments" && (m === "callee" || m === "caller")) {
  24002. if (state.option.noarg)
  24003. warning("W059", left, m);
  24004. else if (state.isStrict())
  24005. error("E008");
  24006. } else if (!state.option.evil && left && left.value === "document" &&
  24007. (m === "write" || m === "writeln")) {
  24008. warning("W060", left);
  24009. }
  24010. if (!state.option.evil && (m === "eval" || m === "execScript")) {
  24011. if (isGlobalEval(left, state)) {
  24012. warning("W061");
  24013. }
  24014. }
  24015. return that;
  24016. }, 160, true);
  24017. infix("(", function(left, that) {
  24018. if (state.option.immed && left && !left.immed && left.id === "function") {
  24019. warning("W062");
  24020. }
  24021. if (state.option.asi && checkPunctuators(state.tokens.prev, [")", "]"]) &&
  24022. state.tokens.prev.line !== startLine(state.tokens.curr)) {
  24023. warning("W014", state.tokens.curr, state.tokens.curr.id);
  24024. }
  24025. var n = 0;
  24026. var p = [];
  24027. if (left) {
  24028. if (left.type === "(identifier)") {
  24029. if (left.value.match(/^[A-Z]([A-Z0-9_$]*[a-z][A-Za-z0-9_$]*)?$/)) {
  24030. if ("Array Number String Boolean Date Object Error Symbol".indexOf(left.value) === -1) {
  24031. if (left.value === "Math") {
  24032. warning("W063", left);
  24033. } else if (state.option.newcap) {
  24034. warning("W064", left);
  24035. }
  24036. }
  24037. }
  24038. }
  24039. }
  24040. if (state.tokens.next.id !== ")") {
  24041. for (;;) {
  24042. p[p.length] = expression(10);
  24043. n += 1;
  24044. if (state.tokens.next.id !== ",") {
  24045. break;
  24046. }
  24047. parseComma();
  24048. }
  24049. }
  24050. advance(")");
  24051. if (typeof left === "object") {
  24052. if (!state.inES5() && left.value === "parseInt" && n === 1) {
  24053. warning("W065", state.tokens.curr);
  24054. }
  24055. if (!state.option.evil) {
  24056. if (left.value === "eval" || left.value === "Function" ||
  24057. left.value === "execScript") {
  24058. warning("W061", left);
  24059. // This conditional expression was initially implemented with a typo
  24060. // which prevented the branch's execution in all cases. While
  24061. // enabling the code will produce behavior that is consistent with
  24062. // the other forms of code evaluation that follow, such a change is
  24063. // also technically incompatable with prior versions of JSHint (due
  24064. // to the fact that the behavior was never formally documented). This
  24065. // branch should be enabled as part of a major release.
  24066. //if (p[0] && p[0].id === "(string)") {
  24067. // addEvalCode(left, p[0]);
  24068. //}
  24069. } else if (p[0] && p[0].id === "(string)" &&
  24070. (left.value === "setTimeout" ||
  24071. left.value === "setInterval")) {
  24072. warning("W066", left);
  24073. addEvalCode(left, p[0]);
  24074. // window.setTimeout/setInterval
  24075. } else if (p[0] && p[0].id === "(string)" &&
  24076. left.value === "." &&
  24077. left.left.value === "window" &&
  24078. (left.right === "setTimeout" ||
  24079. left.right === "setInterval")) {
  24080. warning("W066", left);
  24081. addEvalCode(left, p[0]);
  24082. }
  24083. }
  24084. if (!left.identifier && left.id !== "." && left.id !== "[" && left.id !== "=>" &&
  24085. left.id !== "(" && left.id !== "&&" && left.id !== "||" && left.id !== "?" &&
  24086. !(state.inES6() && left["(name)"])) {
  24087. warning("W067", that);
  24088. }
  24089. }
  24090. that.left = left;
  24091. return that;
  24092. }, 155, true).exps = true;
  24093. prefix("(", function(rbp) {
  24094. var pn = state.tokens.next, pn1, i = -1;
  24095. var ret, triggerFnExpr, first, last;
  24096. var parens = 1;
  24097. var opening = state.tokens.curr;
  24098. var preceeding = state.tokens.prev;
  24099. var isNecessary = !state.option.singleGroups;
  24100. do {
  24101. if (pn.value === "(") {
  24102. parens += 1;
  24103. } else if (pn.value === ")") {
  24104. parens -= 1;
  24105. }
  24106. i += 1;
  24107. pn1 = pn;
  24108. pn = peek(i);
  24109. } while (!(parens === 0 && pn1.value === ")") && pn.type !== "(end)");
  24110. if (state.tokens.next.id === "function") {
  24111. triggerFnExpr = state.tokens.next.immed = true;
  24112. }
  24113. // If the balanced grouping operator is followed by a "fat arrow", the
  24114. // current token marks the beginning of a "fat arrow" function and parsing
  24115. // should proceed accordingly.
  24116. if (pn.value === "=>") {
  24117. return doFunction({ type: "arrow", parsedOpening: true });
  24118. }
  24119. var exprs = [];
  24120. if (state.tokens.next.id !== ")") {
  24121. for (;;) {
  24122. exprs.push(expression(10));
  24123. if (state.tokens.next.id !== ",") {
  24124. break;
  24125. }
  24126. if (state.option.nocomma) {
  24127. warning("W127");
  24128. }
  24129. parseComma();
  24130. }
  24131. }
  24132. advance(")", this);
  24133. if (state.option.immed && exprs[0] && exprs[0].id === "function") {
  24134. if (state.tokens.next.id !== "(" &&
  24135. state.tokens.next.id !== "." && state.tokens.next.id !== "[") {
  24136. warning("W068", this);
  24137. }
  24138. }
  24139. if (!exprs.length) {
  24140. return;
  24141. }
  24142. if (exprs.length > 1) {
  24143. ret = Object.create(state.syntax[","]);
  24144. ret.exprs = exprs;
  24145. first = exprs[0];
  24146. last = exprs[exprs.length - 1];
  24147. } else {
  24148. ret = first = last = exprs[0];
  24149. if (!isNecessary) {
  24150. isNecessary =
  24151. // Used to distinguish from an ExpressionStatement which may not
  24152. // begin with the `{` and `function` tokens
  24153. (opening.beginsStmt && (ret.id === "{" || triggerFnExpr || isFunctor(ret))) ||
  24154. // Used to signal that a function expression is being supplied to
  24155. // some other operator.
  24156. (triggerFnExpr &&
  24157. // For parenthesis wrapping a function expression to be considered
  24158. // necessary, the grouping operator should be the left-hand-side of
  24159. // some other operator--either within the parenthesis or directly
  24160. // following them.
  24161. (!isEndOfExpr() || state.tokens.prev.id !== "}")) ||
  24162. // Used to demarcate an arrow function as the left-hand side of some
  24163. // operator.
  24164. (isFunctor(ret) && !isEndOfExpr()) ||
  24165. // Used as the return value of a single-statement arrow function
  24166. (ret.id === "{" && preceeding.id === "=>") ||
  24167. // Used to delineate an integer number literal from a dereferencing
  24168. // punctuator (otherwise interpreted as a decimal point)
  24169. (ret.type === "(number)" &&
  24170. checkPunctuator(pn, ".") && /^\d+$/.test(ret.value)) ||
  24171. // Used to wrap object destructuring assignment
  24172. (opening.beginsStmt && ret.id === "=" && ret.left.id === "{");
  24173. }
  24174. }
  24175. if (ret) {
  24176. // The operator may be necessary to override the default binding power of
  24177. // neighboring operators (whenever there is an operator in use within the
  24178. // first expression *or* the current group contains multiple expressions)
  24179. if (!isNecessary && (isOperator(first) || ret.exprs)) {
  24180. isNecessary =
  24181. (rbp > first.lbp) ||
  24182. (rbp > 0 && rbp === first.lbp) ||
  24183. (!isEndOfExpr() && last.lbp < state.tokens.next.lbp);
  24184. }
  24185. if (!isNecessary) {
  24186. warning("W126", opening);
  24187. }
  24188. ret.paren = true;
  24189. }
  24190. return ret;
  24191. });
  24192. application("=>");
  24193. infix("[", function(left, that) {
  24194. var e, s, canUseDot;
  24195. if (state.option.asi && checkPunctuators(state.tokens.prev, [")", "]"]) &&
  24196. state.tokens.prev.line !== startLine(state.tokens.curr)) {
  24197. warning("W014", state.tokens.curr, state.tokens.curr.id);
  24198. }
  24199. e = expression(10);
  24200. if (e && e.type === "(string)") {
  24201. if (!state.option.evil && (e.value === "eval" || e.value === "execScript")) {
  24202. if (isGlobalEval(left, state)) {
  24203. warning("W061");
  24204. }
  24205. }
  24206. countMember(e.value);
  24207. if (!state.option.sub && reg.identifier.test(e.value)) {
  24208. s = state.syntax[e.value];
  24209. if (s) {
  24210. canUseDot = !isReserved(s);
  24211. } else {
  24212. // This branch exists to preserve legacy behavior with version 2.9.5
  24213. // and earlier. In those releases, `eval` and `arguments` were
  24214. // incorrectly interpreted as reserved keywords, so Member
  24215. // Expressions such as `object["eval"]` did not trigger warning W069.
  24216. //
  24217. // TODO: Remove in JSHint 3
  24218. canUseDot = e.value !== "eval" && e.value !== "arguments";
  24219. }
  24220. if (canUseDot) {
  24221. warning("W069", state.tokens.prev, e.value);
  24222. }
  24223. }
  24224. }
  24225. advance("]", that);
  24226. if (e && e.value === "hasOwnProperty" && state.tokens.next.value === "=") {
  24227. warning("W001");
  24228. }
  24229. that.left = left;
  24230. that.right = e;
  24231. return that;
  24232. }, 160, true);
  24233. function comprehensiveArrayExpression() {
  24234. var res = {};
  24235. res.exps = true;
  24236. state.funct["(comparray)"].stack();
  24237. // Handle reversed for expressions, used in spidermonkey
  24238. var reversed = false;
  24239. if (state.tokens.next.value !== "for") {
  24240. reversed = true;
  24241. if (!state.inMoz()) {
  24242. warning("W116", state.tokens.next, "for", state.tokens.next.value);
  24243. }
  24244. state.funct["(comparray)"].setState("use");
  24245. res.right = expression(10);
  24246. }
  24247. advance("for");
  24248. if (state.tokens.next.value === "each") {
  24249. advance("each");
  24250. if (!state.inMoz()) {
  24251. warning("W118", state.tokens.curr, "for each");
  24252. }
  24253. }
  24254. advance("(");
  24255. state.funct["(comparray)"].setState("define");
  24256. res.left = expression(130);
  24257. if (_.includes(["in", "of"], state.tokens.next.value)) {
  24258. advance();
  24259. } else {
  24260. error("E045", state.tokens.curr);
  24261. }
  24262. state.funct["(comparray)"].setState("generate");
  24263. expression(10);
  24264. advance(")");
  24265. if (state.tokens.next.value === "if") {
  24266. advance("if");
  24267. advance("(");
  24268. state.funct["(comparray)"].setState("filter");
  24269. expression(10);
  24270. advance(")");
  24271. }
  24272. if (!reversed) {
  24273. state.funct["(comparray)"].setState("use");
  24274. res.right = expression(10);
  24275. }
  24276. advance("]");
  24277. state.funct["(comparray)"].unstack();
  24278. return res;
  24279. }
  24280. prefix("[", function() {
  24281. var blocktype = lookupBlockType();
  24282. if (blocktype.isCompArray) {
  24283. if (!state.option.esnext && !state.inMoz()) {
  24284. warning("W118", state.tokens.curr, "array comprehension");
  24285. }
  24286. return comprehensiveArrayExpression();
  24287. } else if (blocktype.isDestAssign) {
  24288. this.destructAssign = destructuringPattern({ openingParsed: true, assignment: true });
  24289. return this;
  24290. }
  24291. var b = state.tokens.curr.line !== startLine(state.tokens.next);
  24292. this.first = [];
  24293. if (b) {
  24294. indent += state.option.indent;
  24295. if (state.tokens.next.from === indent + state.option.indent) {
  24296. indent += state.option.indent;
  24297. }
  24298. }
  24299. while (state.tokens.next.id !== "(end)") {
  24300. while (state.tokens.next.id === ",") {
  24301. if (!state.option.elision) {
  24302. if (!state.inES5()) {
  24303. // Maintain compat with old options --- ES5 mode without
  24304. // elision=true will warn once per comma
  24305. warning("W070");
  24306. } else {
  24307. warning("W128");
  24308. do {
  24309. advance(",");
  24310. } while (state.tokens.next.id === ",");
  24311. continue;
  24312. }
  24313. }
  24314. advance(",");
  24315. }
  24316. if (state.tokens.next.id === "]") {
  24317. break;
  24318. }
  24319. this.first.push(expression(10));
  24320. if (state.tokens.next.id === ",") {
  24321. parseComma({ allowTrailing: true });
  24322. if (state.tokens.next.id === "]" && !state.inES5()) {
  24323. warning("W070", state.tokens.curr);
  24324. break;
  24325. }
  24326. } else {
  24327. if (state.option.trailingcomma && state.inES5()) {
  24328. warningAt("W140", state.tokens.curr.line, state.tokens.curr.character);
  24329. }
  24330. break;
  24331. }
  24332. }
  24333. if (b) {
  24334. indent -= state.option.indent;
  24335. }
  24336. advance("]", this);
  24337. return this;
  24338. });
  24339. function isMethod() {
  24340. return state.funct["(statement)"] && state.funct["(statement)"].type === "class" ||
  24341. state.funct["(context)"] && state.funct["(context)"]["(verb)"] === "class";
  24342. }
  24343. function isPropertyName(token) {
  24344. return token.identifier || token.id === "(string)" || token.id === "(number)";
  24345. }
  24346. function propertyName(preserveOrToken) {
  24347. var id;
  24348. var preserve = true;
  24349. if (typeof preserveOrToken === "object") {
  24350. id = preserveOrToken;
  24351. } else {
  24352. preserve = preserveOrToken;
  24353. id = optionalidentifier(true, preserve);
  24354. }
  24355. if (!id) {
  24356. if (state.tokens.next.id === "(string)") {
  24357. id = state.tokens.next.value;
  24358. if (!preserve) {
  24359. advance();
  24360. }
  24361. } else if (state.tokens.next.id === "(number)") {
  24362. id = state.tokens.next.value.toString();
  24363. if (!preserve) {
  24364. advance();
  24365. }
  24366. }
  24367. } else if (typeof id === "object") {
  24368. if (id.id === "(string)" || id.id === "(identifier)") id = id.value;
  24369. else if (id.id === "(number)") id = id.value.toString();
  24370. }
  24371. if (id === "hasOwnProperty") {
  24372. warning("W001");
  24373. }
  24374. return id;
  24375. }
  24376. /**
  24377. * @param {Object} [options]
  24378. * @param {token} [options.loneArg] The argument to the function in cases
  24379. * where it was defined using the
  24380. * single-argument shorthand.
  24381. * @param {bool} [options.parsedOpening] Whether the opening parenthesis has
  24382. * already been parsed.
  24383. * @returns {{ arity: number, params: Array.<string>}}
  24384. */
  24385. function functionparams(options) {
  24386. var next;
  24387. var paramsIds = [];
  24388. var ident;
  24389. var tokens = [];
  24390. var t;
  24391. var pastDefault = false;
  24392. var pastRest = false;
  24393. var arity = 0;
  24394. var loneArg = options && options.loneArg;
  24395. if (loneArg && loneArg.identifier === true) {
  24396. state.funct["(scope)"].addParam(loneArg.value, loneArg);
  24397. return { arity: 1, params: [ loneArg.value ] };
  24398. }
  24399. next = state.tokens.next;
  24400. if (!options || !options.parsedOpening) {
  24401. advance("(");
  24402. }
  24403. if (state.tokens.next.id === ")") {
  24404. advance(")");
  24405. return;
  24406. }
  24407. function addParam(addParamArgs) {
  24408. state.funct["(scope)"].addParam.apply(state.funct["(scope)"], addParamArgs);
  24409. }
  24410. for (;;) {
  24411. arity++;
  24412. // are added to the param scope
  24413. var currentParams = [];
  24414. if (_.includes(["{", "["], state.tokens.next.id)) {
  24415. tokens = destructuringPattern();
  24416. for (t in tokens) {
  24417. t = tokens[t];
  24418. if (t.id) {
  24419. paramsIds.push(t.id);
  24420. currentParams.push([t.id, t.token]);
  24421. }
  24422. }
  24423. } else {
  24424. if (checkPunctuator(state.tokens.next, "...")) pastRest = true;
  24425. ident = identifier();
  24426. if (ident) {
  24427. paramsIds.push(ident);
  24428. currentParams.push([ident, state.tokens.curr]);
  24429. } else {
  24430. // Skip invalid parameter.
  24431. while (!checkPunctuators(state.tokens.next, [",", ")"])) advance();
  24432. }
  24433. }
  24434. // It is valid to have a regular argument after a default argument
  24435. // since undefined can be used for missing parameters. Still warn as it is
  24436. // a possible code smell.
  24437. if (pastDefault) {
  24438. if (state.tokens.next.id !== "=") {
  24439. error("W138", state.tokens.curr);
  24440. }
  24441. }
  24442. if (state.tokens.next.id === "=") {
  24443. if (!state.inES6()) {
  24444. warning("W119", state.tokens.next, "default parameters", "6");
  24445. }
  24446. if (pastRest) {
  24447. error("E062", state.tokens.next);
  24448. }
  24449. advance("=");
  24450. pastDefault = true;
  24451. expression(10);
  24452. }
  24453. // now we have evaluated the default expression, add the variable to the param scope
  24454. currentParams.forEach(addParam);
  24455. if (state.tokens.next.id === ",") {
  24456. if (pastRest) {
  24457. warning("W131", state.tokens.next);
  24458. }
  24459. parseComma();
  24460. } else {
  24461. advance(")", next);
  24462. return { arity: arity, params: paramsIds };
  24463. }
  24464. }
  24465. }
  24466. function functor(name, token, overwrites) {
  24467. var funct = {
  24468. "(name)" : name,
  24469. "(breakage)" : 0,
  24470. "(loopage)" : 0,
  24471. // The strictness of the function body is tracked via a dedicated
  24472. // property (as opposed to via the global `state` object) so that the
  24473. // value can be referenced after the body has been fully parsed (i.e.
  24474. // when validating the identifier used in function declarations and
  24475. // function expressions).
  24476. "(isStrict)" : "unknown",
  24477. "(global)" : false,
  24478. "(line)" : null,
  24479. "(character)" : null,
  24480. "(metrics)" : null,
  24481. "(statement)" : null,
  24482. "(context)" : null,
  24483. "(scope)" : null,
  24484. "(comparray)" : null,
  24485. "(generator)" : null,
  24486. "(arrow)" : null,
  24487. "(params)" : null
  24488. };
  24489. if (token) {
  24490. _.extend(funct, {
  24491. "(line)" : token.line,
  24492. "(character)": token.character,
  24493. "(metrics)" : createMetrics(token)
  24494. });
  24495. }
  24496. _.extend(funct, overwrites);
  24497. if (funct["(context)"]) {
  24498. funct["(scope)"] = funct["(context)"]["(scope)"];
  24499. funct["(comparray)"] = funct["(context)"]["(comparray)"];
  24500. }
  24501. return funct;
  24502. }
  24503. function isFunctor(token) {
  24504. return "(scope)" in token;
  24505. }
  24506. /**
  24507. * Determine if the parser has begun parsing executable code.
  24508. *
  24509. * @param {Token} funct - The current "functor" token
  24510. *
  24511. * @returns {boolean}
  24512. */
  24513. function hasParsedCode(funct) {
  24514. return funct["(global)"] && !funct["(verb)"];
  24515. }
  24516. /**
  24517. * This function is used as both a null-denotation method *and* a
  24518. * left-denotation method, meaning the first parameter is overloaded.
  24519. */
  24520. function doTemplateLiteral(leftOrRbp) {
  24521. // ASSERT: this.type === "(template)"
  24522. // jshint validthis: true
  24523. var ctx = this.context;
  24524. var noSubst = this.noSubst;
  24525. var depth = this.depth;
  24526. var left = typeof leftOrRbp === "number" ? null : leftOrRbp;
  24527. if (!noSubst) {
  24528. while (!end()) {
  24529. if (!state.tokens.next.template || state.tokens.next.depth > depth) {
  24530. expression(0); // should probably have different rbp?
  24531. } else {
  24532. // skip template start / middle
  24533. advance();
  24534. }
  24535. }
  24536. }
  24537. return {
  24538. id: "(template)",
  24539. type: "(template)",
  24540. tag: left
  24541. };
  24542. function end() {
  24543. if (state.tokens.curr.template && state.tokens.curr.tail &&
  24544. state.tokens.curr.context === ctx) return true;
  24545. var complete = (state.tokens.next.template && state.tokens.next.tail &&
  24546. state.tokens.next.context === ctx);
  24547. if (complete) advance();
  24548. return complete || state.tokens.next.isUnclosed;
  24549. }
  24550. }
  24551. /**
  24552. * @param {Object} [options]
  24553. * @param {string} [options.name] The identifier belonging to the function (if
  24554. * any)
  24555. * @param {token} [options.statement] The statement that triggered creation
  24556. * of the current function.
  24557. * @param {string} [options.type] If specified, either "generator" or "arrow"
  24558. * @param {token} [options.loneArg] The argument to the function in cases
  24559. * where it was defined using the
  24560. * single-argument shorthand
  24561. * @param {bool} [options.parsedOpening] Whether the opening parenthesis has
  24562. * already been parsed
  24563. * @param {string} [options.classExprBinding] Define a function with this
  24564. * identifier in the new function's
  24565. * scope, mimicking the bahavior of
  24566. * class expression names within
  24567. * the body of member functions.
  24568. */
  24569. function doFunction(options) {
  24570. var f, token, name, statement, classExprBinding, isGenerator, isArrow,
  24571. isMethod, ignoreLoopFunc;
  24572. var oldOption = state.option;
  24573. var oldIgnored = state.ignored;
  24574. if (options) {
  24575. name = options.name;
  24576. statement = options.statement;
  24577. classExprBinding = options.classExprBinding;
  24578. isGenerator = options.type === "generator";
  24579. isArrow = options.type === "arrow";
  24580. isMethod = options.isMethod;
  24581. ignoreLoopFunc = options.ignoreLoopFunc;
  24582. }
  24583. state.option = Object.create(state.option);
  24584. state.ignored = Object.create(state.ignored);
  24585. state.funct = functor(name || state.nameStack.infer(), state.tokens.next, {
  24586. "(statement)": statement,
  24587. "(context)": state.funct,
  24588. "(arrow)": isArrow,
  24589. "(method)": isMethod,
  24590. "(generator)": isGenerator
  24591. });
  24592. f = state.funct;
  24593. token = state.tokens.curr;
  24594. functions.push(state.funct);
  24595. // So that the function is available to itself and referencing itself is not
  24596. // seen as a closure, add the function name to a new scope, but do not
  24597. // test for unused (unused: false)
  24598. // it is a new block scope so that params can override it, it can be block scoped
  24599. // but declarations inside the function don't cause already declared error
  24600. state.funct["(scope)"].stack("functionouter");
  24601. var internallyAccessibleName = name || classExprBinding;
  24602. if (internallyAccessibleName) {
  24603. state.funct["(scope)"].block.add(internallyAccessibleName,
  24604. classExprBinding ? "class" : "function", state.tokens.curr, false);
  24605. }
  24606. if (!isArrow) {
  24607. state.funct["(scope)"].funct.add("arguments", "var", token, false);
  24608. }
  24609. // create the param scope (params added in functionparams)
  24610. state.funct["(scope)"].stack("functionparams");
  24611. var paramsInfo = functionparams(options);
  24612. if (paramsInfo) {
  24613. state.funct["(params)"] = paramsInfo.params;
  24614. state.funct["(metrics)"].arity = paramsInfo.arity;
  24615. state.funct["(metrics)"].verifyMaxParametersPerFunction();
  24616. } else {
  24617. state.funct["(metrics)"].arity = 0;
  24618. }
  24619. if (isArrow) {
  24620. if (!state.inES6(true)) {
  24621. warning("W119", state.tokens.curr, "arrow function syntax (=>)", "6");
  24622. }
  24623. if (!options.loneArg) {
  24624. advance("=>");
  24625. }
  24626. }
  24627. block(false, true, true, isArrow);
  24628. if (!state.option.noyield && isGenerator &&
  24629. state.funct["(generator)"] !== "yielded") {
  24630. warning("W124", state.tokens.curr);
  24631. }
  24632. state.funct["(metrics)"].verifyMaxStatementsPerFunction();
  24633. state.funct["(metrics)"].verifyMaxComplexityPerFunction();
  24634. state.funct["(unusedOption)"] = state.option.unused;
  24635. state.option = oldOption;
  24636. state.ignored = oldIgnored;
  24637. state.funct["(last)"] = state.tokens.curr.line;
  24638. state.funct["(lastcharacter)"] = state.tokens.curr.character;
  24639. // unstack the params scope
  24640. state.funct["(scope)"].unstack(); // also does usage and label checks
  24641. // unstack the function outer stack
  24642. state.funct["(scope)"].unstack();
  24643. state.funct = state.funct["(context)"];
  24644. if (!ignoreLoopFunc && !state.option.loopfunc && state.funct["(loopage)"]) {
  24645. // If the function we just parsed accesses any non-local variables
  24646. // trigger a warning. Otherwise, the function is safe even within
  24647. // a loop.
  24648. if (f["(outerMutables)"]) {
  24649. warning("W083", token, f["(outerMutables)"].join(", "));
  24650. }
  24651. }
  24652. return f;
  24653. }
  24654. function createMetrics(functionStartToken) {
  24655. return {
  24656. statementCount: 0,
  24657. nestedBlockDepth: -1,
  24658. ComplexityCount: 1,
  24659. arity: 0,
  24660. verifyMaxStatementsPerFunction: function() {
  24661. if (state.option.maxstatements &&
  24662. this.statementCount > state.option.maxstatements) {
  24663. warning("W071", functionStartToken, this.statementCount);
  24664. }
  24665. },
  24666. verifyMaxParametersPerFunction: function() {
  24667. if (_.isNumber(state.option.maxparams) &&
  24668. this.arity > state.option.maxparams) {
  24669. warning("W072", functionStartToken, this.arity);
  24670. }
  24671. },
  24672. verifyMaxNestedBlockDepthPerFunction: function() {
  24673. if (state.option.maxdepth &&
  24674. this.nestedBlockDepth > 0 &&
  24675. this.nestedBlockDepth === state.option.maxdepth + 1) {
  24676. warning("W073", null, this.nestedBlockDepth);
  24677. }
  24678. },
  24679. verifyMaxComplexityPerFunction: function() {
  24680. var max = state.option.maxcomplexity;
  24681. var cc = this.ComplexityCount;
  24682. if (max && cc > max) {
  24683. warning("W074", functionStartToken, cc);
  24684. }
  24685. }
  24686. };
  24687. }
  24688. function increaseComplexityCount() {
  24689. state.funct["(metrics)"].ComplexityCount += 1;
  24690. }
  24691. // Parse assignments that were found instead of conditionals.
  24692. // For example: if (a = 1) { ... }
  24693. function checkCondAssignment(expr) {
  24694. var id, paren;
  24695. if (expr) {
  24696. id = expr.id;
  24697. paren = expr.paren;
  24698. if (id === "," && (expr = expr.exprs[expr.exprs.length - 1])) {
  24699. id = expr.id;
  24700. paren = paren || expr.paren;
  24701. }
  24702. }
  24703. switch (id) {
  24704. case "=":
  24705. case "+=":
  24706. case "-=":
  24707. case "*=":
  24708. case "%=":
  24709. case "&=":
  24710. case "|=":
  24711. case "^=":
  24712. case "/=":
  24713. if (!paren && !state.option.boss) {
  24714. warning("W084");
  24715. }
  24716. }
  24717. }
  24718. /**
  24719. * @param {object} props Collection of property descriptors for a given
  24720. * object.
  24721. */
  24722. function checkProperties(props) {
  24723. // Check for lonely setters if in the ES5 mode.
  24724. if (state.inES5()) {
  24725. for (var name in props) {
  24726. if (props[name] && props[name].setterToken && !props[name].getterToken) {
  24727. warning("W078", props[name].setterToken);
  24728. }
  24729. }
  24730. }
  24731. }
  24732. function metaProperty(name, c) {
  24733. if (checkPunctuator(state.tokens.next, ".")) {
  24734. var left = state.tokens.curr.id;
  24735. advance(".");
  24736. var id = identifier();
  24737. state.tokens.curr.isMetaProperty = true;
  24738. if (name !== id) {
  24739. error("E057", state.tokens.prev, left, id);
  24740. } else {
  24741. c();
  24742. }
  24743. return state.tokens.curr;
  24744. }
  24745. }
  24746. (function(x) {
  24747. x.nud = function() {
  24748. var b, f, i, p, t, isGeneratorMethod = false, nextVal;
  24749. var props = Object.create(null); // All properties, including accessors
  24750. b = state.tokens.curr.line !== startLine(state.tokens.next);
  24751. if (b) {
  24752. indent += state.option.indent;
  24753. if (state.tokens.next.from === indent + state.option.indent) {
  24754. indent += state.option.indent;
  24755. }
  24756. }
  24757. var blocktype = lookupBlockType();
  24758. if (blocktype.isDestAssign) {
  24759. this.destructAssign = destructuringPattern({ openingParsed: true, assignment: true });
  24760. return this;
  24761. }
  24762. for (;;) {
  24763. if (state.tokens.next.id === "}") {
  24764. break;
  24765. }
  24766. nextVal = state.tokens.next.value;
  24767. if (state.tokens.next.identifier &&
  24768. (peekIgnoreEOL().id === "," || peekIgnoreEOL().id === "}")) {
  24769. if (!state.inES6()) {
  24770. warning("W104", state.tokens.next, "object short notation", "6");
  24771. }
  24772. i = propertyName(true);
  24773. saveProperty(props, i, state.tokens.next);
  24774. expression(10);
  24775. } else if (peek().id !== ":" && (nextVal === "get" || nextVal === "set")) {
  24776. advance(nextVal);
  24777. if (!state.inES5()) {
  24778. error("E034");
  24779. }
  24780. if (state.tokens.next.id === "[") {
  24781. i = computedPropertyName();
  24782. } else {
  24783. i = propertyName();
  24784. // ES6 allows for get() {...} and set() {...} method
  24785. // definition shorthand syntax, so we don't produce an error
  24786. // if linting ECMAScript 6 code.
  24787. if (!i && !state.inES6()) {
  24788. error("E035");
  24789. }
  24790. }
  24791. // We don't want to save this getter unless it's an actual getter
  24792. // and not an ES6 concise method
  24793. if (i) {
  24794. saveAccessor(nextVal, props, i, state.tokens.curr);
  24795. }
  24796. t = state.tokens.next;
  24797. f = doFunction({ isMethod: true });
  24798. p = f["(params)"];
  24799. // Don't warn about getter/setter pairs if this is an ES6 concise method
  24800. if (nextVal === "get" && i && p) {
  24801. warning("W076", t, p[0], i);
  24802. } else if (nextVal === "set" && i && f["(metrics)"].arity !== 1) {
  24803. warning("W077", t, i);
  24804. }
  24805. } else {
  24806. if (state.tokens.next.value === "*" && state.tokens.next.type === "(punctuator)") {
  24807. if (!state.inES6()) {
  24808. warning("W104", state.tokens.next, "generator functions", "6");
  24809. }
  24810. advance("*");
  24811. isGeneratorMethod = true;
  24812. } else {
  24813. isGeneratorMethod = false;
  24814. }
  24815. if (state.tokens.next.id === "[") {
  24816. i = computedPropertyName();
  24817. state.nameStack.set(i);
  24818. } else {
  24819. state.nameStack.set(state.tokens.next);
  24820. i = propertyName();
  24821. saveProperty(props, i, state.tokens.next);
  24822. if (typeof i !== "string") {
  24823. break;
  24824. }
  24825. }
  24826. if (state.tokens.next.value === "(") {
  24827. if (!state.inES6()) {
  24828. warning("W104", state.tokens.curr, "concise methods", "6");
  24829. }
  24830. doFunction({
  24831. isMethod: true,
  24832. type: isGeneratorMethod ? "generator" : null
  24833. });
  24834. } else {
  24835. advance(":");
  24836. expression(10);
  24837. }
  24838. }
  24839. countMember(i);
  24840. if (state.tokens.next.id === ",") {
  24841. parseComma({ allowTrailing: true, property: true });
  24842. if (state.tokens.next.id === ",") {
  24843. warning("W070", state.tokens.curr);
  24844. } else if (state.tokens.next.id === "}" && !state.inES5()) {
  24845. warning("W070", state.tokens.curr);
  24846. }
  24847. } else {
  24848. if (state.option.trailingcomma && state.inES5()) {
  24849. warningAt("W140", state.tokens.curr.line, state.tokens.curr.character);
  24850. }
  24851. break;
  24852. }
  24853. }
  24854. if (b) {
  24855. indent -= state.option.indent;
  24856. }
  24857. advance("}", this);
  24858. checkProperties(props);
  24859. return this;
  24860. };
  24861. x.fud = function() {
  24862. error("E036", state.tokens.curr);
  24863. };
  24864. }(delim("{")));
  24865. function destructuringPattern(options) {
  24866. var isAssignment = options && options.assignment;
  24867. if (!state.inES6()) {
  24868. warning("W104", state.tokens.curr,
  24869. isAssignment ? "destructuring assignment" : "destructuring binding", "6");
  24870. }
  24871. return destructuringPatternRecursive(options);
  24872. }
  24873. function destructuringPatternRecursive(options) {
  24874. var ids, idx;
  24875. var identifiers = [];
  24876. var openingParsed = options && options.openingParsed;
  24877. var isAssignment = options && options.assignment;
  24878. var recursiveOptions = isAssignment ? { assignment: isAssignment } : null;
  24879. var firstToken = openingParsed ? state.tokens.curr : state.tokens.next;
  24880. var nextInnerDE = function() {
  24881. var ident;
  24882. if (checkPunctuators(state.tokens.next, ["[", "{"])) {
  24883. ids = destructuringPatternRecursive(recursiveOptions);
  24884. for (idx = 0; idx < ids.length; idx++) {
  24885. identifiers.push({ id: ids[idx].id, token: ids[idx].token });
  24886. }
  24887. } else if (checkPunctuator(state.tokens.next, ",")) {
  24888. identifiers.push({ id: null, token: state.tokens.curr });
  24889. } else if (checkPunctuator(state.tokens.next, "(")) {
  24890. advance("(");
  24891. nextInnerDE();
  24892. advance(")");
  24893. } else {
  24894. var is_rest = checkPunctuator(state.tokens.next, "...");
  24895. if (isAssignment) {
  24896. var assignTarget = expression(20);
  24897. if (assignTarget) {
  24898. checkLeftSideAssign(assignTarget);
  24899. // if the target was a simple identifier, add it to the list to return
  24900. if (assignTarget.identifier) {
  24901. ident = assignTarget.value;
  24902. }
  24903. }
  24904. } else {
  24905. ident = identifier();
  24906. }
  24907. if (ident) {
  24908. identifiers.push({ id: ident, token: state.tokens.curr });
  24909. }
  24910. return is_rest;
  24911. }
  24912. return false;
  24913. };
  24914. var assignmentProperty = function() {
  24915. var id;
  24916. if (checkPunctuator(state.tokens.next, "[")) {
  24917. advance("[");
  24918. expression(10);
  24919. advance("]");
  24920. advance(":");
  24921. nextInnerDE();
  24922. } else if (state.tokens.next.id === "(string)" ||
  24923. state.tokens.next.id === "(number)") {
  24924. advance();
  24925. advance(":");
  24926. nextInnerDE();
  24927. } else {
  24928. // this id will either be the property name or the property name and the assigning identifier
  24929. id = identifier();
  24930. if (checkPunctuator(state.tokens.next, ":")) {
  24931. advance(":");
  24932. nextInnerDE();
  24933. } else if (id) {
  24934. // in this case we are assigning (not declaring), so check assignment
  24935. if (isAssignment) {
  24936. checkLeftSideAssign(state.tokens.curr);
  24937. }
  24938. identifiers.push({ id: id, token: state.tokens.curr });
  24939. }
  24940. }
  24941. };
  24942. var id, value;
  24943. if (checkPunctuator(firstToken, "[")) {
  24944. if (!openingParsed) {
  24945. advance("[");
  24946. }
  24947. if (checkPunctuator(state.tokens.next, "]")) {
  24948. warning("W137", state.tokens.curr);
  24949. }
  24950. var element_after_rest = false;
  24951. while (!checkPunctuator(state.tokens.next, "]")) {
  24952. if (nextInnerDE() && !element_after_rest &&
  24953. checkPunctuator(state.tokens.next, ",")) {
  24954. warning("W130", state.tokens.next);
  24955. element_after_rest = true;
  24956. }
  24957. if (checkPunctuator(state.tokens.next, "=")) {
  24958. if (checkPunctuator(state.tokens.prev, "...")) {
  24959. advance("]");
  24960. } else {
  24961. advance("=");
  24962. }
  24963. id = state.tokens.prev;
  24964. value = expression(10);
  24965. if (value && value.identifier && value.value === "undefined") {
  24966. warning("W080", id, id.value);
  24967. }
  24968. }
  24969. if (!checkPunctuator(state.tokens.next, "]")) {
  24970. advance(",");
  24971. }
  24972. }
  24973. advance("]");
  24974. } else if (checkPunctuator(firstToken, "{")) {
  24975. if (!openingParsed) {
  24976. advance("{");
  24977. }
  24978. if (checkPunctuator(state.tokens.next, "}")) {
  24979. warning("W137", state.tokens.curr);
  24980. }
  24981. while (!checkPunctuator(state.tokens.next, "}")) {
  24982. assignmentProperty();
  24983. if (checkPunctuator(state.tokens.next, "=")) {
  24984. advance("=");
  24985. id = state.tokens.prev;
  24986. value = expression(10);
  24987. if (value && value.identifier && value.value === "undefined") {
  24988. warning("W080", id, id.value);
  24989. }
  24990. }
  24991. if (!checkPunctuator(state.tokens.next, "}")) {
  24992. advance(",");
  24993. if (checkPunctuator(state.tokens.next, "}")) {
  24994. // Trailing comma
  24995. // ObjectBindingPattern: { BindingPropertyList , }
  24996. break;
  24997. }
  24998. }
  24999. }
  25000. advance("}");
  25001. }
  25002. return identifiers;
  25003. }
  25004. function destructuringPatternMatch(tokens, value) {
  25005. var first = value.first;
  25006. if (!first)
  25007. return;
  25008. _.zip(tokens, Array.isArray(first) ? first : [ first ]).forEach(function(val) {
  25009. var token = val[0];
  25010. var value = val[1];
  25011. if (token && value)
  25012. token.first = value;
  25013. else if (token && token.first && !value)
  25014. warning("W080", token.first, token.first.value);
  25015. });
  25016. }
  25017. function blockVariableStatement(type, statement, context) {
  25018. // used for both let and const statements
  25019. var prefix = context && context.prefix;
  25020. var inexport = context && context.inexport;
  25021. var isLet = type === "let";
  25022. var isConst = type === "const";
  25023. var tokens, lone, value, letblock;
  25024. if (!state.inES6()) {
  25025. warning("W104", state.tokens.curr, type, "6");
  25026. }
  25027. if (isLet && state.tokens.next.value === "(") {
  25028. if (!state.inMoz()) {
  25029. warning("W118", state.tokens.next, "let block");
  25030. }
  25031. advance("(");
  25032. state.funct["(scope)"].stack();
  25033. letblock = true;
  25034. } else if (state.funct["(noblockscopedvar)"]) {
  25035. error("E048", state.tokens.curr, isConst ? "Const" : "Let");
  25036. }
  25037. statement.first = [];
  25038. for (;;) {
  25039. var names = [];
  25040. if (_.includes(["{", "["], state.tokens.next.value)) {
  25041. tokens = destructuringPattern();
  25042. lone = false;
  25043. } else {
  25044. tokens = [ { id: identifier(), token: state.tokens.curr } ];
  25045. lone = true;
  25046. }
  25047. if (!prefix && isConst && state.tokens.next.id !== "=") {
  25048. warning("E012", state.tokens.curr, state.tokens.curr.value);
  25049. }
  25050. for (var t in tokens) {
  25051. if (tokens.hasOwnProperty(t)) {
  25052. t = tokens[t];
  25053. if (state.funct["(scope)"].block.isGlobal()) {
  25054. if (predefined[t.id] === false) {
  25055. warning("W079", t.token, t.id);
  25056. }
  25057. }
  25058. if (t.id && !state.funct["(noblockscopedvar)"]) {
  25059. state.funct["(scope)"].addlabel(t.id, {
  25060. type: type,
  25061. token: t.token });
  25062. names.push(t.token);
  25063. }
  25064. }
  25065. }
  25066. if (state.tokens.next.id === "=") {
  25067. advance("=");
  25068. if (!prefix && peek(0).id === "=" && state.tokens.next.identifier) {
  25069. warning("W120", state.tokens.next, state.tokens.next.value);
  25070. }
  25071. var id = state.tokens.prev;
  25072. // don't accept `in` in expression if prefix is used for ForIn/Of loop.
  25073. value = expression(prefix ? 120 : 10);
  25074. if (!prefix && value && value.identifier && value.value === "undefined") {
  25075. warning("W080", id, id.value);
  25076. }
  25077. if (!lone) {
  25078. destructuringPatternMatch(names, value);
  25079. }
  25080. }
  25081. if (!prefix) {
  25082. for (t in tokens) {
  25083. if (tokens.hasOwnProperty(t)) {
  25084. t = tokens[t];
  25085. state.funct["(scope)"].initialize(t.id);
  25086. if (lone && inexport) {
  25087. state.funct["(scope)"].setExported(t.token.value, t.token);
  25088. }
  25089. }
  25090. }
  25091. }
  25092. statement.first = statement.first.concat(names);
  25093. if (state.tokens.next.id !== ",") {
  25094. break;
  25095. }
  25096. parseComma();
  25097. }
  25098. if (letblock) {
  25099. advance(")");
  25100. block(true, true);
  25101. statement.block = true;
  25102. state.funct["(scope)"].unstack();
  25103. }
  25104. return statement;
  25105. }
  25106. var conststatement = stmt("const", function(context) {
  25107. return blockVariableStatement("const", this, context);
  25108. });
  25109. conststatement.exps = true;
  25110. var letstatement = stmt("let", function(context) {
  25111. return blockVariableStatement("let", this, context);
  25112. });
  25113. letstatement.exps = true;
  25114. var varstatement = stmt("var", function(context) {
  25115. var prefix = context && context.prefix;
  25116. var inexport = context && context.inexport;
  25117. var tokens, lone, value, id;
  25118. this.first = [];
  25119. for (;;) {
  25120. var names = [];
  25121. if (_.includes(["{", "["], state.tokens.next.value)) {
  25122. tokens = destructuringPattern();
  25123. lone = false;
  25124. } else {
  25125. tokens = [];
  25126. id = identifier();
  25127. if (id) {
  25128. tokens.push({ id: id, token: state.tokens.curr });
  25129. }
  25130. lone = true;
  25131. }
  25132. if (state.option.varstmt) {
  25133. warning("W132", this);
  25134. }
  25135. this.first = this.first.concat(names);
  25136. for (var t in tokens) {
  25137. if (tokens.hasOwnProperty(t)) {
  25138. t = tokens[t];
  25139. if (state.funct["(global)"] && !state.impliedClosure()) {
  25140. if (predefined[t.id] === false) {
  25141. warning("W079", t.token, t.id);
  25142. } else if (state.option.futurehostile === false) {
  25143. if ((!state.inES5() && vars.ecmaIdentifiers[5][t.id] === false) ||
  25144. (!state.inES6() && vars.ecmaIdentifiers[6][t.id] === false)) {
  25145. warning("W129", t.token, t.id);
  25146. }
  25147. }
  25148. }
  25149. if (t.id) {
  25150. state.funct["(scope)"].addlabel(t.id, {
  25151. type: "var",
  25152. token: t.token });
  25153. if (lone && inexport) {
  25154. state.funct["(scope)"].setExported(t.id, t.token);
  25155. }
  25156. names.push(t.token);
  25157. }
  25158. }
  25159. }
  25160. if (state.tokens.next.id === "=") {
  25161. state.nameStack.set(state.tokens.curr);
  25162. advance("=");
  25163. if (peek(0).id === "=" && state.tokens.next.identifier) {
  25164. if (!prefix &&
  25165. !state.funct["(params)"] ||
  25166. state.funct["(params)"].indexOf(state.tokens.next.value) === -1) {
  25167. warning("W120", state.tokens.next, state.tokens.next.value);
  25168. }
  25169. }
  25170. id = state.tokens.prev;
  25171. // don't accept `in` in expression if prefix is used for ForIn/Of loop.
  25172. value = expression(prefix ? 120 : 10);
  25173. if (value && !prefix && !state.funct["(loopage)"] &&
  25174. value.identifier && value.value === "undefined") {
  25175. warning("W080", id, id.value);
  25176. }
  25177. if (!lone) {
  25178. destructuringPatternMatch(names, value);
  25179. }
  25180. }
  25181. if (state.tokens.next.id !== ",") {
  25182. break;
  25183. }
  25184. parseComma();
  25185. }
  25186. return this;
  25187. });
  25188. varstatement.exps = true;
  25189. blockstmt("class", function(rbp) {
  25190. return classdef.call(this, rbp, true);
  25191. });
  25192. function classdef(rbp, isStatement) {
  25193. /*jshint validthis:true */
  25194. var wasInClassBody = state.inClassBody;
  25195. state.inClassBody = true;
  25196. if (!state.inES6()) {
  25197. warning("W104", state.tokens.curr, "class", "6");
  25198. }
  25199. if (isStatement) {
  25200. // BindingIdentifier
  25201. this.name = identifier();
  25202. state.funct["(scope)"].addlabel(this.name, {
  25203. type: "class",
  25204. token: state.tokens.curr });
  25205. } else if (state.tokens.next.identifier && state.tokens.next.value !== "extends") {
  25206. // BindingIdentifier(opt)
  25207. this.name = identifier();
  25208. this.namedExpr = true;
  25209. } else {
  25210. this.name = state.nameStack.infer();
  25211. }
  25212. classtail(this);
  25213. state.inClassBody = wasInClassBody;
  25214. if (isStatement) {
  25215. state.funct["(scope)"].initialize(this.name);
  25216. }
  25217. return this;
  25218. }
  25219. function classtail(c) {
  25220. // ClassHeritage(opt)
  25221. if (state.tokens.next.value === "extends") {
  25222. advance("extends");
  25223. expression(10);
  25224. }
  25225. advance("{");
  25226. // ClassBody(opt)
  25227. classbody(c);
  25228. advance("}");
  25229. }
  25230. function classbody(c) {
  25231. var name;
  25232. var isStatic;
  25233. var isGenerator;
  25234. var getset;
  25235. var props = Object.create(null);
  25236. var staticProps = Object.create(null);
  25237. var computed;
  25238. while (state.tokens.next.id !== "}") {
  25239. name = state.tokens.next;
  25240. isStatic = false;
  25241. isGenerator = false;
  25242. getset = null;
  25243. // The ES6 grammar for ClassElement includes the `;` token, but it is
  25244. // defined only as a placeholder to facilitate future language
  25245. // extensions. In ES6 code, it serves no purpose.
  25246. if (name.id === ";") {
  25247. warning("W032");
  25248. advance(";");
  25249. continue;
  25250. }
  25251. if (name.id === "*") {
  25252. isGenerator = true;
  25253. advance("*");
  25254. name = state.tokens.next;
  25255. }
  25256. if (name.id === "[") {
  25257. name = computedPropertyName();
  25258. computed = true;
  25259. } else if (isPropertyName(name)) {
  25260. // Non-Computed PropertyName
  25261. advance();
  25262. computed = false;
  25263. if (name.identifier && name.value === "static") {
  25264. if (checkPunctuator(state.tokens.next, "*")) {
  25265. isGenerator = true;
  25266. advance("*");
  25267. }
  25268. if (isPropertyName(state.tokens.next) || state.tokens.next.id === "[") {
  25269. computed = state.tokens.next.id === "[";
  25270. isStatic = true;
  25271. name = state.tokens.next;
  25272. if (state.tokens.next.id === "[") {
  25273. name = computedPropertyName();
  25274. } else advance();
  25275. }
  25276. }
  25277. if (name.identifier && (name.value === "get" || name.value === "set")) {
  25278. if (isPropertyName(state.tokens.next) || state.tokens.next.id === "[") {
  25279. computed = state.tokens.next.id === "[";
  25280. getset = name;
  25281. name = state.tokens.next;
  25282. if (state.tokens.next.id === "[") {
  25283. name = computedPropertyName();
  25284. } else advance();
  25285. }
  25286. }
  25287. } else {
  25288. warning("W052", state.tokens.next, state.tokens.next.value || state.tokens.next.type);
  25289. advance();
  25290. continue;
  25291. }
  25292. if (!checkPunctuator(state.tokens.next, "(")) {
  25293. // error --- class properties must be methods
  25294. error("E054", state.tokens.next, state.tokens.next.value);
  25295. while (state.tokens.next.id !== "}" &&
  25296. !checkPunctuator(state.tokens.next, "(")) {
  25297. advance();
  25298. }
  25299. if (state.tokens.next.value !== "(") {
  25300. doFunction({
  25301. isMethod: true,
  25302. statement: c
  25303. });
  25304. }
  25305. }
  25306. if (!computed) {
  25307. // We don't know how to determine if we have duplicate computed property names :(
  25308. if (getset) {
  25309. saveAccessor(
  25310. getset.value, isStatic ? staticProps : props, name.value, name, true, isStatic);
  25311. } else {
  25312. if (name.value === "constructor") {
  25313. state.nameStack.set(c);
  25314. } else {
  25315. state.nameStack.set(name);
  25316. }
  25317. saveProperty(isStatic ? staticProps : props, name.value, name, true, isStatic);
  25318. }
  25319. }
  25320. if (getset && name.value === "constructor") {
  25321. var propDesc = getset.value === "get" ? "class getter method" : "class setter method";
  25322. error("E049", name, propDesc, "constructor");
  25323. } else if (name.value === "prototype") {
  25324. error("E049", name, "class method", "prototype");
  25325. }
  25326. propertyName(name);
  25327. doFunction({
  25328. statement: c,
  25329. isMethod: true,
  25330. type: isGenerator ? "generator" : null,
  25331. classExprBinding: c.namedExpr ? c.name : null
  25332. });
  25333. }
  25334. checkProperties(props);
  25335. }
  25336. blockstmt("function", function(context) {
  25337. var inexport = context && context.inexport;
  25338. var generator = false;
  25339. if (state.tokens.next.value === "*") {
  25340. advance("*");
  25341. if (state.inES6(true)) {
  25342. generator = true;
  25343. } else {
  25344. warning("W119", state.tokens.curr, "function*", "6");
  25345. }
  25346. }
  25347. if (inblock) {
  25348. warning("W082", state.tokens.curr);
  25349. }
  25350. var nameToken = optionalidentifier() ? state.tokens.curr : null;
  25351. if (!nameToken) {
  25352. warning("W025");
  25353. } else {
  25354. state.funct["(scope)"].addlabel(nameToken.value, {
  25355. type: generator ? "generator function" : "function",
  25356. token: state.tokens.curr,
  25357. initialized: true });
  25358. if (inexport) {
  25359. state.funct["(scope)"].setExported(nameToken.value, state.tokens.prev);
  25360. }
  25361. }
  25362. var f = doFunction({
  25363. name: nameToken && nameToken.value,
  25364. statement: this,
  25365. type: generator ? "generator" : null,
  25366. ignoreLoopFunc: inblock // a declaration may already have warned
  25367. });
  25368. // If the function declaration is strict because the surrounding code is
  25369. // strict, the invalid name will trigger E008 when the scope manager
  25370. // attempts to create a binding in the strict environment record. An error
  25371. // should only be signaled here when the function itself enables strict
  25372. // mode (the scope manager will not report an error because a declaration
  25373. // does not introduce a binding into the function's environment record).
  25374. var enablesStrictMode = f["(isStrict)"] && !state.isStrict();
  25375. if (nameToken && (f["(name)"] === "arguments" || f["(name)"] === "eval") &&
  25376. enablesStrictMode) {
  25377. error("E008", nameToken);
  25378. }
  25379. if (state.tokens.next.id === "(" && state.tokens.next.line === state.tokens.curr.line) {
  25380. error("E039");
  25381. }
  25382. return this;
  25383. });
  25384. prefix("function", function() {
  25385. var generator = false;
  25386. if (state.tokens.next.value === "*") {
  25387. if (!state.inES6()) {
  25388. warning("W119", state.tokens.curr, "function*", "6");
  25389. }
  25390. advance("*");
  25391. generator = true;
  25392. }
  25393. var nameToken = optionalidentifier() ? state.tokens.curr : null;
  25394. var f = doFunction({
  25395. name: nameToken && nameToken.value,
  25396. type: generator ? "generator" : null
  25397. });
  25398. if (nameToken && (f["(name)"] === "arguments" || f["(name)"] === "eval") &&
  25399. f["(isStrict)"]) {
  25400. error("E008", nameToken);
  25401. }
  25402. return this;
  25403. });
  25404. blockstmt("if", function() {
  25405. var t = state.tokens.next;
  25406. increaseComplexityCount();
  25407. state.condition = true;
  25408. advance("(");
  25409. var expr = expression(0);
  25410. if (!expr) {
  25411. quit("E041", this);
  25412. }
  25413. checkCondAssignment(expr);
  25414. // When the if is within a for-in loop, check if the condition
  25415. // starts with a negation operator
  25416. var forinifcheck = null;
  25417. if (state.option.forin && state.forinifcheckneeded) {
  25418. state.forinifcheckneeded = false; // We only need to analyze the first if inside the loop
  25419. forinifcheck = state.forinifchecks[state.forinifchecks.length - 1];
  25420. if (expr.type === "(punctuator)" && expr.value === "!") {
  25421. forinifcheck.type = "(negative)";
  25422. } else {
  25423. forinifcheck.type = "(positive)";
  25424. }
  25425. }
  25426. advance(")", t);
  25427. state.condition = false;
  25428. var s = block(true, true);
  25429. // When the if is within a for-in loop and the condition has a negative form,
  25430. // check if the body contains nothing but a continue statement
  25431. if (forinifcheck && forinifcheck.type === "(negative)") {
  25432. if (s && s[0] && s[0].type === "(identifier)" && s[0].value === "continue") {
  25433. forinifcheck.type = "(negative-with-continue)";
  25434. }
  25435. }
  25436. if (state.tokens.next.id === "else") {
  25437. advance("else");
  25438. if (state.tokens.next.id === "if" || state.tokens.next.id === "switch") {
  25439. statement();
  25440. } else {
  25441. block(true, true);
  25442. }
  25443. }
  25444. return this;
  25445. });
  25446. blockstmt("try", function() {
  25447. var b;
  25448. function doCatch() {
  25449. advance("catch");
  25450. advance("(");
  25451. state.funct["(scope)"].stack("catchparams");
  25452. if (checkPunctuators(state.tokens.next, ["[", "{"])) {
  25453. var tokens = destructuringPattern();
  25454. _.each(tokens, function(token) {
  25455. if (token.id) {
  25456. state.funct["(scope)"].addParam(token.id, token, "exception");
  25457. }
  25458. });
  25459. } else if (state.tokens.next.type !== "(identifier)") {
  25460. warning("E030", state.tokens.next, state.tokens.next.value);
  25461. } else {
  25462. // only advance if we have an identifier so we can continue parsing in the most common error - that no param is given.
  25463. state.funct["(scope)"].addParam(identifier(), state.tokens.curr, "exception");
  25464. }
  25465. if (state.tokens.next.value === "if") {
  25466. if (!state.inMoz()) {
  25467. warning("W118", state.tokens.curr, "catch filter");
  25468. }
  25469. advance("if");
  25470. expression(0);
  25471. }
  25472. advance(")");
  25473. block(false);
  25474. state.funct["(scope)"].unstack();
  25475. }
  25476. block(true);
  25477. while (state.tokens.next.id === "catch") {
  25478. increaseComplexityCount();
  25479. if (b && (!state.inMoz())) {
  25480. warning("W118", state.tokens.next, "multiple catch blocks");
  25481. }
  25482. doCatch();
  25483. b = true;
  25484. }
  25485. if (state.tokens.next.id === "finally") {
  25486. advance("finally");
  25487. block(true);
  25488. return;
  25489. }
  25490. if (!b) {
  25491. error("E021", state.tokens.next, "catch", state.tokens.next.value);
  25492. }
  25493. return this;
  25494. });
  25495. blockstmt("while", function() {
  25496. var t = state.tokens.next;
  25497. state.funct["(breakage)"] += 1;
  25498. state.funct["(loopage)"] += 1;
  25499. increaseComplexityCount();
  25500. advance("(");
  25501. checkCondAssignment(expression(0));
  25502. advance(")", t);
  25503. block(true, true);
  25504. state.funct["(breakage)"] -= 1;
  25505. state.funct["(loopage)"] -= 1;
  25506. return this;
  25507. }).labelled = true;
  25508. blockstmt("with", function() {
  25509. var t = state.tokens.next;
  25510. if (state.isStrict()) {
  25511. error("E010", state.tokens.curr);
  25512. } else if (!state.option.withstmt) {
  25513. warning("W085", state.tokens.curr);
  25514. }
  25515. advance("(");
  25516. expression(0);
  25517. advance(")", t);
  25518. block(true, true);
  25519. return this;
  25520. });
  25521. blockstmt("switch", function() {
  25522. var t = state.tokens.next;
  25523. var g = false;
  25524. var noindent = false;
  25525. state.funct["(breakage)"] += 1;
  25526. advance("(");
  25527. checkCondAssignment(expression(0));
  25528. advance(")", t);
  25529. t = state.tokens.next;
  25530. advance("{");
  25531. state.funct["(scope)"].stack();
  25532. if (state.tokens.next.from === indent)
  25533. noindent = true;
  25534. if (!noindent)
  25535. indent += state.option.indent;
  25536. this.cases = [];
  25537. for (;;) {
  25538. switch (state.tokens.next.id) {
  25539. case "case":
  25540. switch (state.funct["(verb)"]) {
  25541. case "yield":
  25542. case "break":
  25543. case "case":
  25544. case "continue":
  25545. case "return":
  25546. case "switch":
  25547. case "throw":
  25548. break;
  25549. default:
  25550. // You can tell JSHint that you don't use break intentionally by
  25551. // adding a comment /* falls through */ on a line just before
  25552. // the next `case`.
  25553. if (!state.tokens.curr.caseFallsThrough) {
  25554. warning("W086", state.tokens.curr, "case");
  25555. }
  25556. }
  25557. advance("case");
  25558. this.cases.push(expression(0));
  25559. increaseComplexityCount();
  25560. g = true;
  25561. advance(":");
  25562. state.funct["(verb)"] = "case";
  25563. break;
  25564. case "default":
  25565. switch (state.funct["(verb)"]) {
  25566. case "yield":
  25567. case "break":
  25568. case "continue":
  25569. case "return":
  25570. case "throw":
  25571. break;
  25572. default:
  25573. // Do not display a warning if 'default' is the first statement or if
  25574. // there is a special /* falls through */ comment.
  25575. if (this.cases.length) {
  25576. if (!state.tokens.curr.caseFallsThrough) {
  25577. warning("W086", state.tokens.curr, "default");
  25578. }
  25579. }
  25580. }
  25581. advance("default");
  25582. g = true;
  25583. advance(":");
  25584. break;
  25585. case "}":
  25586. if (!noindent)
  25587. indent -= state.option.indent;
  25588. advance("}", t);
  25589. state.funct["(scope)"].unstack();
  25590. state.funct["(breakage)"] -= 1;
  25591. state.funct["(verb)"] = undefined;
  25592. return;
  25593. case "(end)":
  25594. error("E023", state.tokens.next, "}");
  25595. return;
  25596. default:
  25597. indent += state.option.indent;
  25598. if (g) {
  25599. switch (state.tokens.curr.id) {
  25600. case ",":
  25601. error("E040");
  25602. return;
  25603. case ":":
  25604. g = false;
  25605. statements();
  25606. break;
  25607. default:
  25608. error("E025", state.tokens.curr);
  25609. return;
  25610. }
  25611. } else {
  25612. if (state.tokens.curr.id === ":") {
  25613. advance(":");
  25614. error("E024", state.tokens.curr, ":");
  25615. statements();
  25616. } else {
  25617. error("E021", state.tokens.next, "case", state.tokens.next.value);
  25618. return;
  25619. }
  25620. }
  25621. indent -= state.option.indent;
  25622. }
  25623. }
  25624. }).labelled = true;
  25625. stmt("debugger", function() {
  25626. if (!state.option.debug) {
  25627. warning("W087", this);
  25628. }
  25629. return this;
  25630. }).exps = true;
  25631. (function() {
  25632. var x = stmt("do", function() {
  25633. state.funct["(breakage)"] += 1;
  25634. state.funct["(loopage)"] += 1;
  25635. increaseComplexityCount();
  25636. this.first = block(true, true);
  25637. advance("while");
  25638. var t = state.tokens.next;
  25639. advance("(");
  25640. checkCondAssignment(expression(0));
  25641. advance(")", t);
  25642. state.funct["(breakage)"] -= 1;
  25643. state.funct["(loopage)"] -= 1;
  25644. return this;
  25645. });
  25646. x.labelled = true;
  25647. x.exps = true;
  25648. }());
  25649. blockstmt("for", function() {
  25650. var s, t = state.tokens.next;
  25651. var letscope = false;
  25652. var foreachtok = null;
  25653. if (t.value === "each") {
  25654. foreachtok = t;
  25655. advance("each");
  25656. if (!state.inMoz()) {
  25657. warning("W118", state.tokens.curr, "for each");
  25658. }
  25659. }
  25660. increaseComplexityCount();
  25661. advance("(");
  25662. // what kind of for(…) statement it is? for(…of…)? for(…in…)? for(…;…;…)?
  25663. var nextop; // contains the token of the "in" or "of" operator
  25664. var i = 0;
  25665. var inof = ["in", "of"];
  25666. var level = 0; // BindingPattern "level" --- level 0 === no BindingPattern
  25667. var comma; // First comma punctuator at level 0
  25668. var initializer; // First initializer at level 0
  25669. var bindingPower;
  25670. var targets;
  25671. var target;
  25672. // If initial token is a BindingPattern, count it as such.
  25673. if (checkPunctuators(state.tokens.next, ["{", "["])) ++level;
  25674. do {
  25675. nextop = peek(i);
  25676. ++i;
  25677. if (checkPunctuators(nextop, ["{", "["])) ++level;
  25678. else if (checkPunctuators(nextop, ["}", "]"])) --level;
  25679. if (level < 0) break;
  25680. if (level === 0) {
  25681. if (!comma && checkPunctuator(nextop, ",")) comma = nextop;
  25682. else if (!initializer && checkPunctuator(nextop, "=")) initializer = nextop;
  25683. }
  25684. } while (
  25685. (level > 0 || !_.includes(inof, nextop.value) && nextop.value !== ";") &&
  25686. nextop.type !== "(end)");
  25687. // if we're in a for (… in|of …) statement
  25688. if (_.includes(inof, nextop.value)) {
  25689. if (nextop.value === "of") {
  25690. bindingPower = 20;
  25691. if (!state.inES6()) {
  25692. warning("W104", nextop, "for of", "6");
  25693. }
  25694. } else {
  25695. bindingPower = 0;
  25696. }
  25697. if (initializer) {
  25698. error("W133", comma, nextop.value, "initializer is forbidden");
  25699. }
  25700. if (comma) {
  25701. error("W133", comma, nextop.value, "more than one ForBinding");
  25702. }
  25703. if (state.tokens.next.id === "var") {
  25704. advance("var");
  25705. state.tokens.curr.fud({ prefix: true });
  25706. } else if (state.tokens.next.id === "let" || state.tokens.next.id === "const") {
  25707. advance(state.tokens.next.id);
  25708. // create a new block scope
  25709. letscope = true;
  25710. state.funct["(scope)"].stack();
  25711. state.tokens.curr.fud({ prefix: true });
  25712. } else {
  25713. targets = [];
  25714. // The following parsing logic recognizes initializers and the comma
  25715. // operator despite the fact that they are not supported by the
  25716. // grammar. Doing so allows JSHint to emit more a meaningful error
  25717. // message (i.e. W133) in response to a common programming mistake.
  25718. do {
  25719. if (checkPunctuators(state.tokens.next, ["{", "["])) {
  25720. destructuringPattern({ assignment: true }).forEach(function(elem) {
  25721. this.push(elem.token);
  25722. }, targets);
  25723. } else {
  25724. target = expression(120);
  25725. if (target.type === "(identifier)") {
  25726. targets.push(target);
  25727. }
  25728. checkLeftSideAssign(target, nextop);
  25729. }
  25730. if (checkPunctuator(state.tokens.next, "=")) {
  25731. advance("=");
  25732. expression(120);
  25733. }
  25734. if (checkPunctuator(state.tokens.next, ",")) {
  25735. advance(",");
  25736. }
  25737. } while (state.tokens.next !== nextop);
  25738. // In the event of a syntax error, do no issue warnings regarding the
  25739. // implicit creation of bindings.
  25740. if (!initializer && !comma) {
  25741. targets.forEach(function(token) {
  25742. if (!state.funct["(scope)"].has(token.value)) {
  25743. warning("W088", token, token.value);
  25744. }
  25745. });
  25746. }
  25747. }
  25748. advance(nextop.value);
  25749. // The binding power is variable because for-in statements accept any
  25750. // Expression in this position, while for-of statements are limited to
  25751. // AssignmentExpressions. For example:
  25752. //
  25753. // for ( LeftHandSideExpression in Expression ) Statement
  25754. // for ( LeftHandSideExpression of AssignmentExpression ) Statement
  25755. expression(bindingPower);
  25756. advance(")", t);
  25757. if (nextop.value === "in" && state.option.forin) {
  25758. state.forinifcheckneeded = true;
  25759. if (state.forinifchecks === undefined) {
  25760. state.forinifchecks = [];
  25761. }
  25762. // Push a new for-in-if check onto the stack. The type will be modified
  25763. // when the loop's body is parsed and a suitable if statement exists.
  25764. state.forinifchecks.push({
  25765. type: "(none)"
  25766. });
  25767. }
  25768. state.funct["(breakage)"] += 1;
  25769. state.funct["(loopage)"] += 1;
  25770. s = block(true, true);
  25771. if (nextop.value === "in" && state.option.forin) {
  25772. if (state.forinifchecks && state.forinifchecks.length > 0) {
  25773. var check = state.forinifchecks.pop();
  25774. if (// No if statement or not the first statement in loop body
  25775. s && s.length > 0 && (typeof s[0] !== "object" || s[0].value !== "if") ||
  25776. // Positive if statement is not the only one in loop body
  25777. check.type === "(positive)" && s.length > 1 ||
  25778. // Negative if statement but no continue
  25779. check.type === "(negative)") {
  25780. warning("W089", this);
  25781. }
  25782. }
  25783. // Reset the flag in case no if statement was contained in the loop body
  25784. state.forinifcheckneeded = false;
  25785. }
  25786. state.funct["(breakage)"] -= 1;
  25787. state.funct["(loopage)"] -= 1;
  25788. } else {
  25789. if (foreachtok) {
  25790. error("E045", foreachtok);
  25791. }
  25792. if (state.tokens.next.id !== ";") {
  25793. if (state.tokens.next.id === "var") {
  25794. advance("var");
  25795. state.tokens.curr.fud();
  25796. } else if (state.tokens.next.id === "let") {
  25797. advance("let");
  25798. // create a new block scope
  25799. letscope = true;
  25800. state.funct["(scope)"].stack();
  25801. state.tokens.curr.fud();
  25802. } else {
  25803. for (;;) {
  25804. expression(0, "for");
  25805. if (state.tokens.next.id !== ",") {
  25806. break;
  25807. }
  25808. parseComma();
  25809. }
  25810. }
  25811. }
  25812. nolinebreak(state.tokens.curr);
  25813. advance(";");
  25814. // start loopage after the first ; as the next two expressions are executed
  25815. // on every loop
  25816. state.funct["(loopage)"] += 1;
  25817. if (state.tokens.next.id !== ";") {
  25818. checkCondAssignment(expression(0));
  25819. }
  25820. nolinebreak(state.tokens.curr);
  25821. advance(";");
  25822. if (state.tokens.next.id === ";") {
  25823. error("E021", state.tokens.next, ")", ";");
  25824. }
  25825. if (state.tokens.next.id !== ")") {
  25826. for (;;) {
  25827. expression(0, "for");
  25828. if (state.tokens.next.id !== ",") {
  25829. break;
  25830. }
  25831. parseComma();
  25832. }
  25833. }
  25834. advance(")", t);
  25835. state.funct["(breakage)"] += 1;
  25836. block(true, true);
  25837. state.funct["(breakage)"] -= 1;
  25838. state.funct["(loopage)"] -= 1;
  25839. }
  25840. // unstack loop blockscope
  25841. if (letscope) {
  25842. state.funct["(scope)"].unstack();
  25843. }
  25844. return this;
  25845. }).labelled = true;
  25846. stmt("break", function() {
  25847. var v = state.tokens.next.value;
  25848. if (!state.option.asi)
  25849. nolinebreak(this);
  25850. if (state.tokens.next.id !== ";" && !state.tokens.next.reach &&
  25851. state.tokens.curr.line === startLine(state.tokens.next)) {
  25852. if (!state.funct["(scope)"].funct.hasBreakLabel(v)) {
  25853. warning("W090", state.tokens.next, v);
  25854. }
  25855. this.first = state.tokens.next;
  25856. advance();
  25857. } else {
  25858. if (state.funct["(breakage)"] === 0)
  25859. warning("W052", state.tokens.next, this.value);
  25860. }
  25861. reachable(this);
  25862. return this;
  25863. }).exps = true;
  25864. stmt("continue", function() {
  25865. var v = state.tokens.next.value;
  25866. if (state.funct["(breakage)"] === 0 || !state.funct["(loopage)"]) {
  25867. warning("W052", state.tokens.next, this.value);
  25868. }
  25869. if (!state.option.asi)
  25870. nolinebreak(this);
  25871. if (state.tokens.next.id !== ";" && !state.tokens.next.reach) {
  25872. if (state.tokens.curr.line === startLine(state.tokens.next)) {
  25873. if (!state.funct["(scope)"].funct.hasBreakLabel(v)) {
  25874. warning("W090", state.tokens.next, v);
  25875. }
  25876. this.first = state.tokens.next;
  25877. advance();
  25878. }
  25879. }
  25880. reachable(this);
  25881. return this;
  25882. }).exps = true;
  25883. stmt("return", function() {
  25884. if (this.line === startLine(state.tokens.next)) {
  25885. if (state.tokens.next.id !== ";" && !state.tokens.next.reach) {
  25886. this.first = expression(0);
  25887. if (this.first &&
  25888. this.first.type === "(punctuator)" && this.first.value === "=" &&
  25889. !this.first.paren && !state.option.boss) {
  25890. warningAt("W093", this.first.line, this.first.character);
  25891. }
  25892. }
  25893. } else {
  25894. if (state.tokens.next.type === "(punctuator)" &&
  25895. ["[", "{", "+", "-"].indexOf(state.tokens.next.value) > -1) {
  25896. nolinebreak(this); // always warn (Line breaking error)
  25897. }
  25898. }
  25899. reachable(this);
  25900. return this;
  25901. }).exps = true;
  25902. (function(x) {
  25903. x.exps = true;
  25904. x.lbp = 25;
  25905. x.ltBoundary = "after";
  25906. }(prefix("yield", function() {
  25907. if (state.inMoz()) {
  25908. return mozYield.call(this);
  25909. }
  25910. var prev = state.tokens.prev;
  25911. if (!this.beginsStmt && prev.lbp > 30 && !checkPunctuators(prev, ["("])) {
  25912. error("E061", this);
  25913. }
  25914. if (state.inES6(true) && !state.funct["(generator)"]) {
  25915. // If it's a yield within a catch clause inside a generator then that's ok
  25916. if (!("(catch)" === state.funct["(name)"] && state.funct["(context)"]["(generator)"])) {
  25917. error("E046", state.tokens.curr, "yield");
  25918. }
  25919. } else if (!state.inES6()) {
  25920. warning("W104", state.tokens.curr, "yield", "6");
  25921. }
  25922. state.funct["(generator)"] = "yielded";
  25923. if (state.tokens.next.value === "*") {
  25924. advance("*");
  25925. }
  25926. // Parse operand
  25927. if (!isEndOfExpr() && state.tokens.next.id !== ",") {
  25928. if (state.tokens.next.nud) {
  25929. nobreaknonadjacent(state.tokens.curr, state.tokens.next);
  25930. this.first = expression(10);
  25931. if (this.first.type === "(punctuator)" && this.first.value === "=" &&
  25932. !this.first.paren && !state.option.boss) {
  25933. warningAt("W093", this.first.line, this.first.character);
  25934. }
  25935. } else if (state.tokens.next.led) {
  25936. if (state.tokens.next.id !== ",") {
  25937. error("W017", state.tokens.next);
  25938. }
  25939. }
  25940. }
  25941. return this;
  25942. })));
  25943. /**
  25944. * Parsing logic for non-standard Mozilla implementation of `yield`
  25945. * expressions.
  25946. */
  25947. var mozYield = function() {
  25948. var prev = state.tokens.prev;
  25949. if (state.inES6(true) && !state.funct["(generator)"]) {
  25950. // If it's a yield within a catch clause inside a generator then that's ok
  25951. if (!("(catch)" === state.funct["(name)"] && state.funct["(context)"]["(generator)"])) {
  25952. error("E046", state.tokens.curr, "yield");
  25953. }
  25954. }
  25955. state.funct["(generator)"] = "yielded";
  25956. var delegatingYield = false;
  25957. if (state.tokens.next.value === "*") {
  25958. delegatingYield = true;
  25959. advance("*");
  25960. }
  25961. if (this.line === startLine(state.tokens.next)) {
  25962. if (delegatingYield ||
  25963. (state.tokens.next.id !== ";" && !state.option.asi &&
  25964. !state.tokens.next.reach && state.tokens.next.nud)) {
  25965. nobreaknonadjacent(state.tokens.curr, state.tokens.next);
  25966. this.first = expression(10);
  25967. if (this.first.type === "(punctuator)" && this.first.value === "=" &&
  25968. !this.first.paren && !state.option.boss) {
  25969. warningAt("W093", this.first.line, this.first.character);
  25970. }
  25971. }
  25972. if (state.tokens.next.id !== ")" &&
  25973. (prev.lbp > 30 || (!prev.assign && !isEndOfExpr()) || prev.id === "yield")) {
  25974. error("E050", this);
  25975. }
  25976. } else if (!state.option.asi) {
  25977. nolinebreak(this); // always warn (Line breaking error)
  25978. }
  25979. return this;
  25980. };
  25981. stmt("throw", function() {
  25982. nolinebreak(this);
  25983. this.first = expression(20);
  25984. reachable(this);
  25985. return this;
  25986. }).exps = true;
  25987. stmt("import", function() {
  25988. if (!state.funct["(scope)"].block.isGlobal()) {
  25989. error("E053", state.tokens.curr, "Import");
  25990. }
  25991. if (!state.inES6()) {
  25992. warning("W119", state.tokens.curr, "import", "6");
  25993. }
  25994. if (state.tokens.next.type === "(string)") {
  25995. // ModuleSpecifier :: StringLiteral
  25996. advance("(string)");
  25997. return this;
  25998. }
  25999. if (state.tokens.next.identifier) {
  26000. // ImportClause :: ImportedDefaultBinding
  26001. this.name = identifier();
  26002. // Import bindings are immutable (see ES6 8.1.1.5.5)
  26003. state.funct["(scope)"].addlabel(this.name, {
  26004. type: "import",
  26005. initialized: true,
  26006. token: state.tokens.curr });
  26007. if (state.tokens.next.value === ",") {
  26008. // ImportClause :: ImportedDefaultBinding , NameSpaceImport
  26009. // ImportClause :: ImportedDefaultBinding , NamedImports
  26010. advance(",");
  26011. // At this point, we intentionally fall through to continue matching
  26012. // either NameSpaceImport or NamedImports.
  26013. // Discussion:
  26014. // https://github.com/jshint/jshint/pull/2144#discussion_r23978406
  26015. } else {
  26016. advance("from");
  26017. advance("(string)");
  26018. return this;
  26019. }
  26020. }
  26021. if (state.tokens.next.id === "*") {
  26022. // ImportClause :: NameSpaceImport
  26023. advance("*");
  26024. advance("as");
  26025. if (state.tokens.next.identifier) {
  26026. this.name = identifier();
  26027. // Import bindings are immutable (see ES6 8.1.1.5.5)
  26028. state.funct["(scope)"].addlabel(this.name, {
  26029. type: "import",
  26030. initialized: true,
  26031. token: state.tokens.curr });
  26032. }
  26033. } else {
  26034. // ImportClause :: NamedImports
  26035. advance("{");
  26036. for (;;) {
  26037. if (state.tokens.next.value === "}") {
  26038. advance("}");
  26039. break;
  26040. }
  26041. var importName;
  26042. if (state.tokens.next.type === "default") {
  26043. importName = "default";
  26044. advance("default");
  26045. } else {
  26046. importName = identifier();
  26047. }
  26048. if (state.tokens.next.value === "as") {
  26049. advance("as");
  26050. importName = identifier();
  26051. }
  26052. // Import bindings are immutable (see ES6 8.1.1.5.5)
  26053. state.funct["(scope)"].addlabel(importName, {
  26054. type: "import",
  26055. initialized: true,
  26056. token: state.tokens.curr });
  26057. if (state.tokens.next.value === ",") {
  26058. advance(",");
  26059. } else if (state.tokens.next.value === "}") {
  26060. advance("}");
  26061. break;
  26062. } else {
  26063. error("E024", state.tokens.next, state.tokens.next.value);
  26064. break;
  26065. }
  26066. }
  26067. }
  26068. // FromClause
  26069. advance("from");
  26070. advance("(string)");
  26071. // Support for ES2015 modules was released without warning for `import`
  26072. // declarations that lack bindings. Issuing a warning would therefor
  26073. // constitute a breaking change.
  26074. // TODO: enable this warning in JSHint 3
  26075. // if (hasBindings) {
  26076. // warning("W142", this, "import", moduleSpecifier);
  26077. // }
  26078. return this;
  26079. }).exps = true;
  26080. stmt("export", function() {
  26081. var ok = true;
  26082. var token;
  26083. var identifier;
  26084. var moduleSpecifier;
  26085. if (!state.inES6()) {
  26086. warning("W119", state.tokens.curr, "export", "6");
  26087. ok = false;
  26088. }
  26089. if (!state.funct["(scope)"].block.isGlobal()) {
  26090. error("E053", state.tokens.curr, "Export");
  26091. ok = false;
  26092. }
  26093. if (state.tokens.next.value === "*") {
  26094. // ExportDeclaration :: export * FromClause
  26095. advance("*");
  26096. advance("from");
  26097. advance("(string)");
  26098. return this;
  26099. }
  26100. if (state.tokens.next.type === "default") {
  26101. // ExportDeclaration ::
  26102. // export default [lookahead ∉ { function, class }] AssignmentExpression[In] ;
  26103. // export default HoistableDeclaration
  26104. // export default ClassDeclaration
  26105. state.nameStack.set(state.tokens.next);
  26106. advance("default");
  26107. var exportType = state.tokens.next.id;
  26108. if (exportType === "function" || exportType === "class") {
  26109. this.block = true;
  26110. }
  26111. token = peek();
  26112. expression(10);
  26113. identifier = token.value;
  26114. if (this.block) {
  26115. state.funct["(scope)"].addlabel(identifier, {
  26116. type: exportType,
  26117. initialized: true,
  26118. token: token });
  26119. state.funct["(scope)"].setExported(identifier, token);
  26120. }
  26121. return this;
  26122. }
  26123. if (state.tokens.next.value === "{") {
  26124. // ExportDeclaration :: export ExportClause
  26125. advance("{");
  26126. var exportedTokens = [];
  26127. while (!checkPunctuator(state.tokens.next, "}")) {
  26128. if (!state.tokens.next.identifier) {
  26129. error("E030", state.tokens.next, state.tokens.next.value);
  26130. }
  26131. advance();
  26132. exportedTokens.push(state.tokens.curr);
  26133. if (state.tokens.next.value === "as") {
  26134. advance("as");
  26135. if (!state.tokens.next.identifier) {
  26136. error("E030", state.tokens.next, state.tokens.next.value);
  26137. }
  26138. advance();
  26139. }
  26140. if (!checkPunctuator(state.tokens.next, "}")) {
  26141. advance(",");
  26142. }
  26143. }
  26144. advance("}");
  26145. if (state.tokens.next.value === "from") {
  26146. // ExportDeclaration :: export ExportClause FromClause
  26147. advance("from");
  26148. moduleSpecifier = state.tokens.next;
  26149. advance("(string)");
  26150. } else if (ok) {
  26151. exportedTokens.forEach(function(token) {
  26152. state.funct["(scope)"].setExported(token.value, token);
  26153. });
  26154. }
  26155. if (exportedTokens.length === 0) {
  26156. if (moduleSpecifier) {
  26157. warning("W142", this, "export", moduleSpecifier.value);
  26158. } else {
  26159. warning("W141", this, "export");
  26160. }
  26161. }
  26162. return this;
  26163. }
  26164. if (state.tokens.next.id === "var") {
  26165. // ExportDeclaration :: export VariableStatement
  26166. advance("var");
  26167. state.tokens.curr.fud({ inexport:true });
  26168. } else if (state.tokens.next.id === "let") {
  26169. // ExportDeclaration :: export VariableStatement
  26170. advance("let");
  26171. state.tokens.curr.fud({ inexport:true });
  26172. } else if (state.tokens.next.id === "const") {
  26173. // ExportDeclaration :: export VariableStatement
  26174. advance("const");
  26175. state.tokens.curr.fud({ inexport:true });
  26176. } else if (state.tokens.next.id === "function") {
  26177. // ExportDeclaration :: export Declaration
  26178. this.block = true;
  26179. advance("function");
  26180. state.syntax["function"].fud({ inexport:true });
  26181. } else if (state.tokens.next.id === "class") {
  26182. // ExportDeclaration :: export Declaration
  26183. this.block = true;
  26184. advance("class");
  26185. var classNameToken = state.tokens.next;
  26186. state.syntax["class"].fud();
  26187. state.funct["(scope)"].setExported(classNameToken.value, classNameToken);
  26188. } else {
  26189. error("E024", state.tokens.next, state.tokens.next.value);
  26190. }
  26191. return this;
  26192. }).exps = true;
  26193. /**
  26194. * Determine if SuperCall or SuperProperty may be used in the current context
  26195. * (as described by the provided "functor" object).
  26196. *
  26197. * @param {string} type - one of "property" or "call"
  26198. * @param {object} funct - a "functor" object describing the current function
  26199. * context
  26200. *
  26201. * @returns {boolean}
  26202. */
  26203. function supportsSuper(type, funct) {
  26204. if (type === "property" && funct["(method)"]) {
  26205. return true;
  26206. }
  26207. if (type === "call" && funct["(statement)"] &&
  26208. funct["(statement)"].id === "class") {
  26209. return true;
  26210. }
  26211. if (funct["(arrow)"]) {
  26212. return supportsSuper(type, funct["(context)"]);
  26213. }
  26214. return false;
  26215. }
  26216. var superNud = function() {
  26217. var next = state.tokens.next;
  26218. if (checkPunctuators(next, ["[", "."])) {
  26219. if (!supportsSuper("property", state.funct)) {
  26220. error("E063", this);
  26221. }
  26222. } else if (checkPunctuator(next, "(")) {
  26223. if (!supportsSuper("call", state.funct)) {
  26224. error("E064", this);
  26225. }
  26226. } else {
  26227. error("E024", next, next.value || next.id);
  26228. }
  26229. return this;
  26230. };
  26231. // Future Reserved Words
  26232. FutureReservedWord("abstract");
  26233. FutureReservedWord("await", { es5: true, moduleOnly: true });
  26234. FutureReservedWord("boolean");
  26235. FutureReservedWord("byte");
  26236. FutureReservedWord("char");
  26237. FutureReservedWord("class", { es5: true, nud: classdef });
  26238. FutureReservedWord("double");
  26239. FutureReservedWord("enum", { es5: true });
  26240. FutureReservedWord("export", { es5: true });
  26241. FutureReservedWord("extends", { es5: true });
  26242. FutureReservedWord("final");
  26243. FutureReservedWord("float");
  26244. FutureReservedWord("goto");
  26245. FutureReservedWord("implements", { es5: true, strictOnly: true });
  26246. FutureReservedWord("import", { es5: true });
  26247. FutureReservedWord("int");
  26248. FutureReservedWord("interface", { es5: true, strictOnly: true });
  26249. FutureReservedWord("long");
  26250. FutureReservedWord("native");
  26251. FutureReservedWord("package", { es5: true, strictOnly: true });
  26252. FutureReservedWord("private", { es5: true, strictOnly: true });
  26253. FutureReservedWord("protected", { es5: true, strictOnly: true });
  26254. FutureReservedWord("public", { es5: true, strictOnly: true });
  26255. FutureReservedWord("short");
  26256. FutureReservedWord("static", { es5: true, strictOnly: true });
  26257. FutureReservedWord("super", { es5: true, nud: superNud });
  26258. FutureReservedWord("synchronized");
  26259. FutureReservedWord("transient");
  26260. FutureReservedWord("volatile");
  26261. // this function is used to determine whether a squarebracket or a curlybracket
  26262. // expression is a comprehension array, destructuring assignment or a json value.
  26263. var lookupBlockType = function() {
  26264. var pn, pn1, prev;
  26265. var i = -1;
  26266. var bracketStack = 0;
  26267. var ret = {};
  26268. if (checkPunctuators(state.tokens.curr, ["[", "{"])) {
  26269. bracketStack += 1;
  26270. }
  26271. do {
  26272. prev = i === -1 ? state.tokens.curr : pn;
  26273. pn = i === -1 ? state.tokens.next : peek(i);
  26274. pn1 = peek(i + 1);
  26275. i = i + 1;
  26276. if (checkPunctuators(pn, ["[", "{"])) {
  26277. bracketStack += 1;
  26278. } else if (checkPunctuators(pn, ["]", "}"])) {
  26279. bracketStack -= 1;
  26280. }
  26281. if (bracketStack === 1 && pn.identifier && pn.value === "for" &&
  26282. !checkPunctuator(prev, ".")) {
  26283. ret.isCompArray = true;
  26284. ret.notJson = true;
  26285. break;
  26286. }
  26287. if (bracketStack === 0 && checkPunctuators(pn, ["}", "]"])) {
  26288. if (pn1.value === "=") {
  26289. ret.isDestAssign = true;
  26290. ret.notJson = true;
  26291. break;
  26292. } else if (pn1.value === ".") {
  26293. ret.notJson = true;
  26294. break;
  26295. }
  26296. }
  26297. if (checkPunctuator(pn, ";")) {
  26298. ret.notJson = true;
  26299. }
  26300. } while (bracketStack > 0 && pn.id !== "(end)");
  26301. return ret;
  26302. };
  26303. function saveProperty(props, name, tkn, isClass, isStatic) {
  26304. var msg = ["key", "class method", "static class method"];
  26305. msg = msg[(isClass || false) + (isStatic || false)];
  26306. if (tkn.identifier) {
  26307. name = tkn.value;
  26308. }
  26309. if (props[name] && name !== "__proto__") {
  26310. warning("W075", state.tokens.next, msg, name);
  26311. } else {
  26312. props[name] = Object.create(null);
  26313. }
  26314. props[name].basic = true;
  26315. props[name].basictkn = tkn;
  26316. }
  26317. /**
  26318. * @param {string} accessorType - Either "get" or "set"
  26319. * @param {object} props - a collection of all properties of the object to
  26320. * which the current accessor is being assigned
  26321. * @param {object} tkn - the identifier token representing the accessor name
  26322. * @param {boolean} isClass - whether the accessor is part of an ES6 Class
  26323. * definition
  26324. * @param {boolean} isStatic - whether the accessor is a static method
  26325. */
  26326. function saveAccessor(accessorType, props, name, tkn, isClass, isStatic) {
  26327. var flagName = accessorType === "get" ? "getterToken" : "setterToken";
  26328. var msg = "";
  26329. if (isClass) {
  26330. if (isStatic) {
  26331. msg += "static ";
  26332. }
  26333. msg += accessorType + "ter method";
  26334. } else {
  26335. msg = "key";
  26336. }
  26337. state.tokens.curr.accessorType = accessorType;
  26338. state.nameStack.set(tkn);
  26339. if (props[name]) {
  26340. if ((props[name].basic || props[name][flagName]) && name !== "__proto__") {
  26341. warning("W075", state.tokens.next, msg, name);
  26342. }
  26343. } else {
  26344. props[name] = Object.create(null);
  26345. }
  26346. props[name][flagName] = tkn;
  26347. }
  26348. function computedPropertyName() {
  26349. advance("[");
  26350. if (!state.inES6()) {
  26351. warning("W119", state.tokens.curr, "computed property names", "6");
  26352. }
  26353. var value = expression(10);
  26354. advance("]");
  26355. return value;
  26356. }
  26357. /**
  26358. * Test whether a given token is a punctuator matching one of the specified values
  26359. * @param {Token} token
  26360. * @param {Array.<string>} values
  26361. * @returns {boolean}
  26362. */
  26363. function checkPunctuators(token, values) {
  26364. if (token.type === "(punctuator)") {
  26365. return _.includes(values, token.value);
  26366. }
  26367. return false;
  26368. }
  26369. /**
  26370. * Test whether a given token is a punctuator matching the specified value
  26371. * @param {Token} token
  26372. * @param {string} value
  26373. * @returns {boolean}
  26374. */
  26375. function checkPunctuator(token, value) {
  26376. return token.type === "(punctuator)" && token.value === value;
  26377. }
  26378. // Check whether this function has been reached for a destructuring assign with undeclared values
  26379. function destructuringAssignOrJsonValue() {
  26380. // lookup for the assignment (ECMAScript 6 only)
  26381. // if it has semicolons, it is a block, so go parse it as a block
  26382. // or it's not a block, but there are assignments, check for undeclared variables
  26383. var block = lookupBlockType();
  26384. if (block.notJson) {
  26385. if (!state.inES6() && block.isDestAssign) {
  26386. warning("W104", state.tokens.curr, "destructuring assignment", "6");
  26387. }
  26388. statements();
  26389. // otherwise parse json value
  26390. } else {
  26391. state.option.laxbreak = true;
  26392. state.jsonMode = true;
  26393. jsonValue();
  26394. }
  26395. }
  26396. // array comprehension parsing function
  26397. // parses and defines the three states of the list comprehension in order
  26398. // to avoid defining global variables, but keeping them to the list comprehension scope
  26399. // only. The order of the states are as follows:
  26400. // * "use" which will be the returned iterative part of the list comprehension
  26401. // * "define" which will define the variables local to the list comprehension
  26402. // * "filter" which will help filter out values
  26403. var arrayComprehension = function() {
  26404. var CompArray = function() {
  26405. this.mode = "use";
  26406. this.variables = [];
  26407. };
  26408. var _carrays = [];
  26409. var _current;
  26410. function declare(v) {
  26411. var l = _current.variables.filter(function(elt) {
  26412. // if it has, change its undef state
  26413. if (elt.value === v) {
  26414. elt.undef = false;
  26415. return v;
  26416. }
  26417. }).length;
  26418. return l !== 0;
  26419. }
  26420. function use(v) {
  26421. var l = _current.variables.filter(function(elt) {
  26422. // and if it has been defined
  26423. if (elt.value === v && !elt.undef) {
  26424. if (elt.unused === true) {
  26425. elt.unused = false;
  26426. }
  26427. return v;
  26428. }
  26429. }).length;
  26430. // otherwise we warn about it
  26431. return (l === 0);
  26432. }
  26433. return { stack: function() {
  26434. _current = new CompArray();
  26435. _carrays.push(_current);
  26436. },
  26437. unstack: function() {
  26438. _current.variables.filter(function(v) {
  26439. if (v.unused)
  26440. warning("W098", v.token, v.token.raw_text || v.value);
  26441. if (v.undef)
  26442. state.funct["(scope)"].block.use(v.value, v.token);
  26443. });
  26444. _carrays.splice(-1, 1);
  26445. _current = _carrays[_carrays.length - 1];
  26446. },
  26447. setState: function(s) {
  26448. if (_.includes(["use", "define", "generate", "filter"], s))
  26449. _current.mode = s;
  26450. },
  26451. check: function(v) {
  26452. if (!_current) {
  26453. return;
  26454. }
  26455. // When we are in "use" state of the list comp, we enqueue that var
  26456. if (_current && _current.mode === "use") {
  26457. if (use(v)) {
  26458. _current.variables.push({
  26459. token: state.tokens.curr,
  26460. value: v,
  26461. undef: true,
  26462. unused: false
  26463. });
  26464. }
  26465. return true;
  26466. // When we are in "define" state of the list comp,
  26467. } else if (_current && _current.mode === "define") {
  26468. // check if the variable has been used previously
  26469. if (!declare(v)) {
  26470. _current.variables.push({
  26471. token: state.tokens.curr,
  26472. value: v,
  26473. undef: false,
  26474. unused: true
  26475. });
  26476. }
  26477. return true;
  26478. // When we are in the "generate" state of the list comp,
  26479. } else if (_current && _current.mode === "generate") {
  26480. state.funct["(scope)"].block.use(v, state.tokens.curr);
  26481. return true;
  26482. // When we are in "filter" state,
  26483. } else if (_current && _current.mode === "filter") {
  26484. // we check whether current variable has been declared
  26485. if (use(v)) {
  26486. // if not we warn about it
  26487. state.funct["(scope)"].block.use(v, state.tokens.curr);
  26488. }
  26489. return true;
  26490. }
  26491. return false;
  26492. }
  26493. };
  26494. };
  26495. // Parse JSON
  26496. function jsonValue() {
  26497. function jsonObject() {
  26498. var o = {}, t = state.tokens.next;
  26499. advance("{");
  26500. if (state.tokens.next.id !== "}") {
  26501. for (;;) {
  26502. if (state.tokens.next.id === "(end)") {
  26503. error("E026", state.tokens.next, t.line);
  26504. } else if (state.tokens.next.id === "}") {
  26505. warning("W094", state.tokens.curr);
  26506. break;
  26507. } else if (state.tokens.next.id === ",") {
  26508. error("E028", state.tokens.next);
  26509. } else if (state.tokens.next.id !== "(string)") {
  26510. warning("W095", state.tokens.next, state.tokens.next.value);
  26511. }
  26512. if (o[state.tokens.next.value] === true) {
  26513. warning("W075", state.tokens.next, "key", state.tokens.next.value);
  26514. } else if ((state.tokens.next.value === "__proto__" &&
  26515. !state.option.proto) || (state.tokens.next.value === "__iterator__" &&
  26516. !state.option.iterator)) {
  26517. warning("W096", state.tokens.next, state.tokens.next.value);
  26518. } else {
  26519. o[state.tokens.next.value] = true;
  26520. }
  26521. advance();
  26522. advance(":");
  26523. jsonValue();
  26524. if (state.tokens.next.id !== ",") {
  26525. break;
  26526. }
  26527. advance(",");
  26528. }
  26529. }
  26530. advance("}");
  26531. }
  26532. function jsonArray() {
  26533. var t = state.tokens.next;
  26534. advance("[");
  26535. if (state.tokens.next.id !== "]") {
  26536. for (;;) {
  26537. if (state.tokens.next.id === "(end)") {
  26538. error("E027", state.tokens.next, t.line);
  26539. } else if (state.tokens.next.id === "]") {
  26540. warning("W094", state.tokens.curr);
  26541. break;
  26542. } else if (state.tokens.next.id === ",") {
  26543. error("E028", state.tokens.next);
  26544. }
  26545. jsonValue();
  26546. if (state.tokens.next.id !== ",") {
  26547. break;
  26548. }
  26549. advance(",");
  26550. }
  26551. }
  26552. advance("]");
  26553. }
  26554. switch (state.tokens.next.id) {
  26555. case "{":
  26556. jsonObject();
  26557. break;
  26558. case "[":
  26559. jsonArray();
  26560. break;
  26561. case "true":
  26562. case "false":
  26563. case "null":
  26564. case "(number)":
  26565. case "(string)":
  26566. advance();
  26567. break;
  26568. case "-":
  26569. advance("-");
  26570. advance("(number)");
  26571. break;
  26572. default:
  26573. error("E003", state.tokens.next);
  26574. }
  26575. }
  26576. /**
  26577. * Lint dynamically-evaluated code, appending any resulting errors/warnings
  26578. * into the global `errors` array.
  26579. *
  26580. * @param {array} internals - collection of "internals" objects describing
  26581. * string tokens that contain evaluated code
  26582. * @param {object} options - linting options to apply
  26583. * @param {object} globals - globally-defined bindings for the evaluated code
  26584. */
  26585. function lintEvalCode(internals, options, globals) {
  26586. var priorErrorCount, idx, jdx, internal;
  26587. for (idx = 0; idx < internals.length; idx += 1) {
  26588. internal = internals[idx];
  26589. options.scope = internal.elem;
  26590. priorErrorCount = JSHINT.errors.length;
  26591. itself(internal.code, options, globals);
  26592. for (jdx = priorErrorCount; jdx < JSHINT.errors.length; jdx += 1) {
  26593. JSHINT.errors[jdx].line += internal.token.line - 1;
  26594. }
  26595. }
  26596. }
  26597. var escapeRegex = function(str) {
  26598. return str.replace(/[-\/\\^$*+?.()|[\]{}]/g, "\\$&");
  26599. };
  26600. // The actual JSHINT function itself.
  26601. var itself = function(s, o, g) {
  26602. var x, reIgnoreStr, reIgnore;
  26603. var optionKeys;
  26604. var newOptionObj = {};
  26605. var newIgnoredObj = {};
  26606. o = _.clone(o);
  26607. state.reset();
  26608. if (o && o.scope) {
  26609. JSHINT.scope = o.scope;
  26610. } else {
  26611. JSHINT.errors = [];
  26612. JSHINT.internals = [];
  26613. JSHINT.blacklist = {};
  26614. JSHINT.scope = "(main)";
  26615. }
  26616. predefined = Object.create(null);
  26617. combine(predefined, vars.ecmaIdentifiers[3]);
  26618. combine(predefined, vars.reservedVars);
  26619. combine(predefined, g || {});
  26620. declared = Object.create(null);
  26621. var exported = Object.create(null); // Variables that live outside the current file
  26622. function each(obj, cb) {
  26623. if (!obj)
  26624. return;
  26625. if (!Array.isArray(obj) && typeof obj === "object")
  26626. obj = Object.keys(obj);
  26627. obj.forEach(cb);
  26628. }
  26629. if (o) {
  26630. each(o.predef || null, function(item) {
  26631. var slice, prop;
  26632. if (item[0] === "-") {
  26633. slice = item.slice(1);
  26634. JSHINT.blacklist[slice] = slice;
  26635. // remove from predefined if there
  26636. delete predefined[slice];
  26637. } else {
  26638. prop = Object.getOwnPropertyDescriptor(o.predef, item);
  26639. predefined[item] = prop ? prop.value : false;
  26640. }
  26641. });
  26642. each(o.exported || null, function(item) {
  26643. exported[item] = true;
  26644. });
  26645. delete o.predef;
  26646. delete o.exported;
  26647. optionKeys = Object.keys(o);
  26648. for (x = 0; x < optionKeys.length; x++) {
  26649. if (/^-W\d{3}$/g.test(optionKeys[x])) {
  26650. newIgnoredObj[optionKeys[x].slice(1)] = true;
  26651. } else {
  26652. var optionKey = optionKeys[x];
  26653. newOptionObj[optionKey] = o[optionKey];
  26654. }
  26655. }
  26656. }
  26657. state.option = newOptionObj;
  26658. state.ignored = newIgnoredObj;
  26659. state.option.indent = state.option.indent || 4;
  26660. state.option.maxerr = state.option.maxerr || 50;
  26661. indent = 1;
  26662. var scopeManagerInst = scopeManager(state, predefined, exported, declared);
  26663. scopeManagerInst.on("warning", function(ev) {
  26664. warning.apply(null, [ ev.code, ev.token].concat(ev.data));
  26665. });
  26666. scopeManagerInst.on("error", function(ev) {
  26667. error.apply(null, [ ev.code, ev.token ].concat(ev.data));
  26668. });
  26669. state.funct = functor("(global)", null, {
  26670. "(global)" : true,
  26671. "(scope)" : scopeManagerInst,
  26672. "(comparray)" : arrayComprehension(),
  26673. "(metrics)" : createMetrics(state.tokens.next)
  26674. });
  26675. functions = [state.funct];
  26676. urls = [];
  26677. member = {};
  26678. membersOnly = null;
  26679. inblock = false;
  26680. lookahead = [];
  26681. if (!isString(s) && !Array.isArray(s)) {
  26682. errorAt("E004", 0);
  26683. return false;
  26684. }
  26685. api = {
  26686. get isJSON() {
  26687. return state.jsonMode;
  26688. },
  26689. getOption: function(name) {
  26690. return state.option[name] || null;
  26691. },
  26692. getCache: function(name) {
  26693. return state.cache[name];
  26694. },
  26695. setCache: function(name, value) {
  26696. state.cache[name] = value;
  26697. },
  26698. warn: function(code, data) {
  26699. warningAt.apply(null, [ code, data.line, data.char ].concat(data.data));
  26700. },
  26701. on: function(names, listener) {
  26702. names.split(" ").forEach(function(name) {
  26703. emitter.on(name, listener);
  26704. }.bind(this));
  26705. }
  26706. };
  26707. emitter.removeAllListeners();
  26708. (extraModules || []).forEach(function(func) {
  26709. func(api);
  26710. });
  26711. state.tokens.prev = state.tokens.curr = state.tokens.next = state.syntax["(begin)"];
  26712. if (o && o.ignoreDelimiters) {
  26713. if (!Array.isArray(o.ignoreDelimiters)) {
  26714. o.ignoreDelimiters = [o.ignoreDelimiters];
  26715. }
  26716. o.ignoreDelimiters.forEach(function(delimiterPair) {
  26717. if (!delimiterPair.start || !delimiterPair.end)
  26718. return;
  26719. reIgnoreStr = escapeRegex(delimiterPair.start) +
  26720. "[\\s\\S]*?" +
  26721. escapeRegex(delimiterPair.end);
  26722. reIgnore = new RegExp(reIgnoreStr, "ig");
  26723. s = s.replace(reIgnore, function(match) {
  26724. return match.replace(/./g, " ");
  26725. });
  26726. });
  26727. }
  26728. lex = new Lexer(s);
  26729. lex.on("warning", function(ev) {
  26730. warningAt.apply(null, [ ev.code, ev.line, ev.character].concat(ev.data));
  26731. });
  26732. lex.on("error", function(ev) {
  26733. errorAt.apply(null, [ ev.code, ev.line, ev.character ].concat(ev.data));
  26734. });
  26735. lex.on("fatal", function(ev) {
  26736. quit("E041", ev);
  26737. });
  26738. lex.on("Identifier", function(ev) {
  26739. emitter.emit("Identifier", ev);
  26740. });
  26741. lex.on("String", function(ev) {
  26742. emitter.emit("String", ev);
  26743. });
  26744. lex.on("Number", function(ev) {
  26745. emitter.emit("Number", ev);
  26746. });
  26747. // Check options
  26748. for (var name in o) {
  26749. if (_.has(o, name)) {
  26750. checkOption(name, state.tokens.curr);
  26751. }
  26752. }
  26753. try {
  26754. applyOptions();
  26755. // combine the passed globals after we've assumed all our options
  26756. combine(predefined, g || {});
  26757. //reset values
  26758. parseComma.first = true;
  26759. advance();
  26760. switch (state.tokens.next.id) {
  26761. case "{":
  26762. case "[":
  26763. destructuringAssignOrJsonValue();
  26764. break;
  26765. default:
  26766. directives();
  26767. if (state.directive["use strict"]) {
  26768. if (!state.allowsGlobalUsd()) {
  26769. warning("W097", state.tokens.prev);
  26770. }
  26771. }
  26772. statements();
  26773. }
  26774. if (state.tokens.next.id !== "(end)") {
  26775. quit("E041", state.tokens.curr);
  26776. }
  26777. state.funct["(scope)"].unstack();
  26778. } catch (err) {
  26779. if (err && err.name === "JSHintError") {
  26780. var nt = state.tokens.next || {};
  26781. JSHINT.errors.push({
  26782. scope : "(main)",
  26783. raw : err.raw,
  26784. code : err.code,
  26785. reason : err.reason,
  26786. line : err.line || nt.line,
  26787. character : err.character || nt.from
  26788. });
  26789. } else {
  26790. throw err;
  26791. }
  26792. }
  26793. // Loop over the listed "internals", and check them as well.
  26794. if (JSHINT.scope === "(main)") {
  26795. lintEvalCode(JSHINT.internals, o || {}, g);
  26796. }
  26797. return JSHINT.errors.length === 0;
  26798. };
  26799. // Modules.
  26800. itself.addModule = function(func) {
  26801. extraModules.push(func);
  26802. };
  26803. itself.addModule(style.register);
  26804. // Data summary.
  26805. itself.data = function() {
  26806. var data = {
  26807. functions: [],
  26808. options: state.option
  26809. };
  26810. var fu, f, i, n, globals;
  26811. if (itself.errors.length) {
  26812. data.errors = itself.errors;
  26813. }
  26814. if (state.jsonMode) {
  26815. data.json = true;
  26816. }
  26817. var impliedGlobals = state.funct["(scope)"].getImpliedGlobals();
  26818. if (impliedGlobals.length > 0) {
  26819. data.implieds = impliedGlobals;
  26820. }
  26821. if (urls.length > 0) {
  26822. data.urls = urls;
  26823. }
  26824. globals = state.funct["(scope)"].getUsedOrDefinedGlobals();
  26825. if (globals.length > 0) {
  26826. data.globals = globals;
  26827. }
  26828. for (i = 1; i < functions.length; i += 1) {
  26829. f = functions[i];
  26830. fu = {};
  26831. fu.name = f["(name)"];
  26832. fu.param = f["(params)"];
  26833. fu.line = f["(line)"];
  26834. fu.character = f["(character)"];
  26835. fu.last = f["(last)"];
  26836. fu.lastcharacter = f["(lastcharacter)"];
  26837. fu.metrics = {
  26838. complexity: f["(metrics)"].ComplexityCount,
  26839. parameters: f["(metrics)"].arity,
  26840. statements: f["(metrics)"].statementCount
  26841. };
  26842. data.functions.push(fu);
  26843. }
  26844. var unuseds = state.funct["(scope)"].getUnuseds();
  26845. if (unuseds.length > 0) {
  26846. data.unused = unuseds;
  26847. }
  26848. for (n in member) {
  26849. if (typeof member[n] === "number") {
  26850. data.member = member;
  26851. break;
  26852. }
  26853. }
  26854. return data;
  26855. };
  26856. itself.jshint = itself;
  26857. return itself;
  26858. }());
  26859. // Make JSHINT a Node module, if possible.
  26860. if (typeof exports === "object" && exports) {
  26861. exports.JSHINT = JSHINT;
  26862. }
  26863. },{"./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}]},{},[]);
  26864. JSHINT = require('jshint').JSHINT;
  26865. if (typeof exports === 'object' && exports) exports.JSHINT = JSHINT;
  26866. }());