mirror of
https://github.com/whoisclebs/lodash.git
synced 2026-01-31 15:27:50 +00:00
6129 lines
191 KiB
JavaScript
6129 lines
191 KiB
JavaScript
/**
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* @license
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* Lo-Dash 3.0.0-pre (Custom Build) <http://lodash.com/>
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* Build: `lodash underscore -o ./dist/lodash.underscore.js`
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* Copyright 2012-2014 The Dojo Foundation <http://dojofoundation.org/>
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* Based on Underscore.js 1.7.0 <http://underscorejs.org/LICENSE>
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* Copyright 2009-2014 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
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* Available under MIT license <http://lodash.com/license>
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*/
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;(function() {
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/** Used as a safe reference for `undefined` in pre ES5 environments */
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var undefined;
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/** Used as the semantic version number */
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var VERSION = '3.0.0-pre';
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/** Used by methods to exit iteration */
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var BREAK_INDICATOR = '__lodash_breaker__';
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/** Used to compose bitmasks for wrapper metadata */
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var BIND_FLAG = 1,
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BIND_KEY_FLAG = 2,
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CURRY_FLAG = 4,
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CURRY_RIGHT_FLAG = 8,
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CURRY_BOUND_FLAG = 16,
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PARTIAL_FLAG = 32;
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/** Used as the TypeError message for "Functions" methods */
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var FUNC_ERROR_TEXT = 'Expected a function';
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/** Used as references for the max length and index of an array */
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var MAX_ARRAY_LENGTH = Math.pow(2, 32) - 1,
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MAX_ARRAY_INDEX = MAX_ARRAY_LENGTH - 1;
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/**
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* Used as the maximum length of an array-like value.
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* See the [ES6 spec](http://people.mozilla.org/~jorendorff/es6-draft.html#sec-tolength)
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* for more details.
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*/
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var MAX_SAFE_INTEGER = Math.pow(2, 53) - 1;
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/** Used as the internal argument placeholder */
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var PLACEHOLDER = '__lodash_placeholder__';
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/** Used to generate unique IDs */
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var idCounter = 0;
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/** Used to match HTML entities and HTML characters */
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var reEscapedHtml = /&(?:amp|lt|gt|quot|#x27|#96);/g,
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reUnescapedHtml = /[&<>"'`]/g;
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/** Used to match template delimiters */
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var reEscape = /<%-([\s\S]+?)%>/g,
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reEvaluate = /<%([\s\S]+?)%>/g,
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reInterpolate = /<%=([\s\S]+?)%>/g;
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/** Used to detect host constructors (Safari > 5) */
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var reHostCtor = /^\[object .+?Constructor\]$/;
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/** Used to ensure capturing order of template delimiters */
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var reNoMatch = /($^)/;
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/**
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* Used to match `RegExp` special characters.
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* See this [article on `RegExp` characters](http://www.regular-expressions.info/characters.html#special)
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* for more details.
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*/
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var reRegExpChars = /[.*+?^${}()|[\]\/\\]/g;
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/** Used to match unescaped characters in compiled string literals */
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var reUnescapedString = /['\n\r\u2028\u2029\\]/g;
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/** `Object#toString` result references */
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var argsClass = '[object Arguments]',
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arrayClass = '[object Array]',
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boolClass = '[object Boolean]',
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dateClass = '[object Date]',
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errorClass = '[object Error]',
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funcClass = '[object Function]',
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mapClass = '[object Map]',
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numberClass = '[object Number]',
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objectClass = '[object Object]',
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regexpClass = '[object RegExp]',
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setClass = '[object Set]',
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stringClass = '[object String]',
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weakMapClass = '[object WeakMap]';
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var arrayBufferClass = '[object ArrayBuffer]',
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float32Class = '[object Float32Array]',
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float64Class = '[object Float64Array]',
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int8Class = '[object Int8Array]',
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int16Class = '[object Int16Array]',
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int32Class = '[object Int32Array]',
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uint8Class = '[object Uint8Array]',
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uint8ClampedClass = '[object Uint8ClampedArray]',
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uint16Class = '[object Uint16Array]',
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uint32Class = '[object Uint32Array]';
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/** Used to identify object classifications that are treated like arrays */
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var arrayLikeClasses = {};
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arrayLikeClasses[argsClass] =
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arrayLikeClasses[arrayClass] = arrayLikeClasses[float32Class] =
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arrayLikeClasses[float64Class] = arrayLikeClasses[int8Class] =
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arrayLikeClasses[int16Class] = arrayLikeClasses[int32Class] =
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arrayLikeClasses[uint8Class] = arrayLikeClasses[uint8ClampedClass] =
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arrayLikeClasses[uint16Class] = arrayLikeClasses[uint32Class] = true;
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arrayLikeClasses[arrayBufferClass] = arrayLikeClasses[boolClass] =
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arrayLikeClasses[dateClass] = arrayLikeClasses[errorClass] =
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arrayLikeClasses[funcClass] = arrayLikeClasses[mapClass] =
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arrayLikeClasses[numberClass] = arrayLikeClasses[objectClass] =
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arrayLikeClasses[regexpClass] = arrayLikeClasses[setClass] =
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arrayLikeClasses[stringClass] = arrayLikeClasses[weakMapClass] = false;
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/**
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* Used to map characters to HTML entities.
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*
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* **Note:** Though the ">" character is escaped for symmetry, characters like
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* ">" and "/" don't require escaping in HTML and have no special meaning
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* unless they're part of a tag or unquoted attribute value.
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* See [Mathias Bynens's article](http://mathiasbynens.be/notes/ambiguous-ampersands)
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* (under "semi-related fun fact") for more details.
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*
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* Backticks are escaped because in Internet Explorer < 9, they can break out
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* of attribute values or HTML comments. See [#102](http://html5sec.org/#102),
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* [#108](http://html5sec.org/#108), and [#133](http://html5sec.org/#133) of
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* the [HTML5 Security Cheatsheet](http://html5sec.org/) for more details.
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*/
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var htmlEscapes = {
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'&': '&',
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'<': '<',
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'>': '>',
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'"': '"',
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"'": ''',
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'`': '`'
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};
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/** Used to map HTML entities to characters */
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var htmlUnescapes = {
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'&': '&',
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'<': '<',
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'>': '>',
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'"': '"',
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''': "'",
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'`': '`'
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};
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/** Used to determine if values are of the language type `Object` */
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var objectTypes = {
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'function': true,
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'object': true
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};
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/** Used to escape characters for inclusion in compiled string literals */
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var stringEscapes = {
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'\\': '\\',
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"'": "'",
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'\n': 'n',
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'\r': 'r',
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'\u2028': 'u2028',
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'\u2029': 'u2029'
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};
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/** Used as a reference to the global object */
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var root = (objectTypes[typeof window] && window) || this;
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/** Detect free variable `exports` */
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var freeExports = objectTypes[typeof exports] && exports && !exports.nodeType && exports;
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/** Detect free variable `module` */
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var freeModule = objectTypes[typeof module] && module && !module.nodeType && module;
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/** Detect free variable `global` from Node.js or Browserified code and use it as `root` */
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var freeGlobal = freeExports && freeModule && typeof global == 'object' && global;
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if (freeGlobal && (freeGlobal.global === freeGlobal || freeGlobal.window === freeGlobal || freeGlobal.self === freeGlobal)) {
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root = freeGlobal;
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}
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/** Detect the popular CommonJS extension `module.exports` */
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var moduleExports = freeModule && freeModule.exports === freeExports && freeExports;
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/*--------------------------------------------------------------------------*/
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/**
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* A specialized version of `_.forEach` for arrays without support for
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* callback shorthands or `this` binding.
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*
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* @private
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* @param {Array} array The array to iterate over.
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* @param {Function} iteratee The function invoked per iteration.
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* @returns {Array} Returns `array`.
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*/
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function arrayEach(array, iteratee) {
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var index = -1,
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length = array.length;
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while (++index < length) {
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if (iteratee(array[index], index, array) === BREAK_INDICATOR) {
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break;
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}
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}
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return array;
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}
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/**
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* A specialized version of `_.every` for arrays without support for callback
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* shorthands or `this` binding.
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*
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* @private
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* @param {Array} array The array to iterate over.
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* @param {Function} predicate The function invoked per iteration.
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* @returns {Array} Returns `true` if all elements pass the predicate check,
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* else `false`
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*/
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function arrayEvery(array, predicate) {
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var index = -1,
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length = array.length;
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while (++index < length) {
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if (!predicate(array[index], index, array)) {
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return false;
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}
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}
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return true;
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}
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/**
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* A specialized version of `_.map` for arrays without support for callback
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* shorthands or `this` binding.
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*
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* @private
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* @param {Array} array The array to iterate over.
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* @param {Function} iteratee The function invoked per iteration.
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* @returns {Array} Returns the new mapped array.
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*/
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function arrayMap(array, iteratee) {
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var index = -1,
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length = array.length,
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result = Array(length);
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while (++index < length) {
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result[index] = iteratee(array[index], index, array);
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}
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return result;
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}
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/**
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* A specialized version of `_.filter` for arrays without support for callback
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* shorthands or `this` binding.
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*
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* @private
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* @param {Array} array The array to iterate over.
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* @param {Function} predicate The function invoked per iteration.
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* @returns {Array} Returns the new filtered array.
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*/
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function arrayFilter(array, predicate) {
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var index = -1,
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length = array.length,
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resIndex = -1,
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result = [];
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while (++index < length) {
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var value = array[index];
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if (predicate(value, index, array)) {
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result[++resIndex] = value;
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}
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}
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return result;
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}
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/**
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* A specialized version of `_.reduce` for arrays without support for callback
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* shorthands or `this` binding.
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*
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* @private
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* @param {Array} array The array to iterate over.
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* @param {Function} iteratee The function invoked per iteration.
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* @param {*} [accumulator] The initial value.
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* @param {boolean} [initFromArray=false] Specify using the first element of
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* `array` as the initial value.
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* @returns {*} Returns the accumulated value.
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*/
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function arrayReduce(array, iteratee, accumulator, initFromArray) {
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var index = -1,
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length = array.length;
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if (initFromArray && length) {
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accumulator = array[++index];
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}
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while (++index < length) {
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accumulator = iteratee(accumulator, array[index], index, array);
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}
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return accumulator;
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}
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/**
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* A specialized version of `_.reduceRight` for arrays without support for
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* callback shorthands or `this` binding.
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*
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* @private
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* @param {Array} array The array to iterate over.
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* @param {Function} iteratee The function invoked per iteration.
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* @param {*} [accumulator] The initial value.
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* @param {boolean} [initFromArray=false] Specify using the last element of
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* `array` as the initial value.
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* @returns {*} Returns the accumulated value.
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*/
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function arrayReduceRight(array, iteratee, accumulator, initFromArray) {
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var length = array.length;
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if (initFromArray && length) {
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accumulator = array[--length];
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}
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while (length--) {
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accumulator = iteratee(accumulator, array[length], length, array);
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}
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return accumulator;
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}
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/**
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* A specialized version of `_.some` for arrays without support for callback
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* shorthands or `this` binding.
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*
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* @private
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* @param {Array} array The array to iterate over.
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* @param {Function} predicate The function invoked per iteration.
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* @returns {boolean} Returns `true` if any element passes the predicate check,
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* else `false`.
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*/
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function arraySome(array, predicate) {
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var index = -1,
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length = array.length;
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while (++index < length) {
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if (predicate(array[index], index, array)) {
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return true;
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}
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}
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return false;
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}
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/**
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* The base implementation of `compareAscending` which compares values and
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* sorts them in ascending order without guaranteeing a stable sort.
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*
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* @private
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* @param {*} value The value to compare to `other`.
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* @param {*} other The value to compare to `value`.
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* @returns {number} Returns the sort order indicator for `value`.
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*/
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function baseCompareAscending(value, other) {
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if (value !== other) {
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var valIsReflexive = value === value,
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othIsReflexive = other === other;
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if (value > other || !valIsReflexive || (typeof value == 'undefined' && othIsReflexive)) {
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return 1;
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}
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if (value < other || !othIsReflexive || (typeof other == 'undefined' && valIsReflexive)) {
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return -1;
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}
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}
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return 0;
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}
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/**
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* The base implementation of `_.indexOf` without support for `fromIndex`
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* bounds checks and binary searches.
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*
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* @private
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* @param {Array} array The array to search.
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* @param {*} value The value to search for.
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* @param {number} [fromIndex=0] The index to search from.
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* @returns {number} Returns the index of the matched value, else `-1`.
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*/
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function baseIndexOf(array, value, fromIndex) {
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if (value !== value) {
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return indexOfNaN(array, fromIndex);
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}
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var index = (fromIndex || 0) - 1,
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length = array.length;
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while (++index < length) {
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if (array[index] === value) {
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return index;
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}
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}
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return -1;
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}
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/**
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* The base implementation of `_.slice` without support for `start` and `end`
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* arguments.
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*
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* @private
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* @param {Array} array The array to slice.
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* @returns {Array} Returns the slice of `array`.
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*/
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function baseSlice(array) {
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var index = -1,
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length = array ? array.length : 0,
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result = Array(length);
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while (++index < length) {
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result[index] = array[index];
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}
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return result;
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}
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/**
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* Used by `_.sortBy` to compare transformed elements of `collection` and stable
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* sort them in ascending order.
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*
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* @private
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* @param {Object} object The object to compare to `other`.
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* @param {Object} other The object to compare to `object`.
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* @returns {number} Returns the sort order indicator for `object`.
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*/
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function compareAscending(object, other) {
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return baseCompareAscending(object.criteria, other.criteria) || (object.index - other.index);
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}
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/**
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* Used by `_.escape` to convert characters to HTML entities.
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*
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* @private
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* @param {string} chr The matched character to escape.
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* @returns {string} Returns the escaped character.
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*/
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function escapeHtmlChar(chr) {
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return htmlEscapes[chr];
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}
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/**
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* Used by `_.template` to escape characters for inclusion in compiled
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* string literals.
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*
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* @private
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* @param {string} chr The matched character to escape.
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* @returns {string} Returns the escaped character.
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*/
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function escapeStringChar(chr) {
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return '\\' + stringEscapes[chr];
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}
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/**
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* Gets the index at which the first occurrence of `NaN` is found in `array`.
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* If `fromRight` is provided elements of `array` are iterated from right to left.
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*
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* @private
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* @param {Array} array The array to search.
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* @param {number} [fromIndex] The index to search from.
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* @param {boolean} [fromRight=false] Specify iterating from right to left.
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* @returns {number} Returns the index of the matched `NaN`, else `-1`.
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*/
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function indexOfNaN(array, fromIndex, fromRight) {
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var length = array.length,
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index = fromRight ? (fromIndex || length) : ((fromIndex || 0) - 1);
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while ((fromRight ? index-- : ++index < length)) {
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var other = array[index];
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if (other !== other) {
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return index;
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}
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}
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return -1;
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}
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/**
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* Checks if the provided arguments are from an iteratee call.
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*
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* @private
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* @param {*} value The potential iteratee value argument.
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* @param {*} index The potential iteratee index or key argument.
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* @param {*} object The potential iteratee object argument.
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* @returns {boolean} Returns `true` if the arguments are from an iteratee call, else `false`.
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*/
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function isIterateeCall(value, index, object) {
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var indexType = typeof index,
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objectType = typeof object;
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return (object && (indexType == 'number' || indexType == 'string') &&
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(objectType == 'function' || objectType == 'object') && object[index] === value) || false;
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}
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/**
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* Replaces all `placeholder` elements in `array` with an internal placeholder
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* and returns an array of their indexes.
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*
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* @private
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* @param {Array} array The array to modify.
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* @param {*} placeholder The placeholder to replace.
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* @returns {Array} Returns the new array of placeholder indexes.
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*/
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function replaceHolders(array, placeholder) {
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var index = -1,
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length = array.length,
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resIndex = -1,
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result = [];
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while (++index < length) {
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if (array[index] === placeholder) {
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array[index] = PLACEHOLDER;
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result[++resIndex] = index;
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}
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}
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return result;
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}
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/**
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* An implementation of `_.uniq` optimized for sorted arrays without support
|
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* for callback shorthands and `this` binding.
|
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*
|
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* @private
|
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* @param {Array} array The array to inspect.
|
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* @param {Function} [iteratee] The function invoked per iteration.
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* @returns {Array} Returns the new duplicate-value-free array.
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*/
|
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function sortedUniq(array, iteratee) {
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var seen,
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index = -1,
|
|
length = array.length,
|
|
resIndex = -1,
|
|
result = [];
|
|
|
|
while (++index < length) {
|
|
var value = array[index],
|
|
computed = iteratee ? iteratee(value, index, array) : value;
|
|
|
|
if (!index || seen !== computed) {
|
|
seen = computed;
|
|
result[++resIndex] = value;
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* Used by `_.unescape` to convert HTML entities to characters.
|
|
*
|
|
* @private
|
|
* @param {string} chr The matched character to unescape.
|
|
* @returns {string} Returns the unescaped character.
|
|
*/
|
|
function unescapeHtmlChar(chr) {
|
|
return htmlUnescapes[chr];
|
|
}
|
|
|
|
/*--------------------------------------------------------------------------*/
|
|
|
|
/** Used for native method references */
|
|
var arrayProto = Array.prototype,
|
|
objectProto = Object.prototype;
|
|
|
|
/** Used to resolve the decompiled source of functions */
|
|
var fnToString = Function.prototype.toString;
|
|
|
|
/** Used to check objects for own properties */
|
|
var hasOwnProperty = objectProto.hasOwnProperty;
|
|
|
|
/** Used to restore the original `_` reference in `_.noConflict` */
|
|
var oldDash = root._;
|
|
|
|
/** Used to resolve the internal `[[Class]]` of values */
|
|
var toString = objectProto.toString;
|
|
|
|
/** Used to detect if a method is native */
|
|
var reNative = RegExp('^' +
|
|
escapeRegExp(toString)
|
|
.replace(/toString|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
|
|
);
|
|
|
|
/** Native method references */
|
|
var ceil = Math.ceil,
|
|
floor = Math.floor,
|
|
push = arrayProto.push,
|
|
propertyIsEnumerable = objectProto.propertyIsEnumerable,
|
|
splice = arrayProto.splice;
|
|
|
|
/* Native method references for those with the same name as other `lodash` methods */
|
|
var nativeCreate = isNative(nativeCreate = Object.create) && nativeCreate,
|
|
nativeIsArray = isNative(nativeIsArray = Array.isArray) && nativeIsArray,
|
|
nativeIsFinite = root.isFinite,
|
|
nativeKeys = isNative(nativeKeys = Object.keys) && nativeKeys,
|
|
nativeMax = Math.max,
|
|
nativeMin = Math.min,
|
|
nativeNow = isNative(nativeNow = Date.now) && nativeNow,
|
|
nativeRandom = Math.random;
|
|
|
|
/*------------------------------------------------------------------------*/
|
|
|
|
/**
|
|
* Creates a `lodash` object which wraps the given value to enable intuitive
|
|
* method chaining.
|
|
*
|
|
* In addition to Lo-Dash methods, wrappers also have the following `Array` methods:
|
|
* `concat`, `join`, `pop`, `push`, `reverse`, `shift`, `slice`, `sort`, `splice`,
|
|
* and `unshift`
|
|
*
|
|
* Chaining is supported in custom builds as long as the `value` method is
|
|
* implicitly or explicitly included in the build.
|
|
*
|
|
* The chainable wrapper functions are:
|
|
* `after`, `assign`, `at`, `before`, `bind`, `bindAll`, `bindKey`, `callback`,
|
|
* `chain`, `chunk`, `compact`, `concat`, `constant`, `countBy`, `create`,
|
|
* `curry`, `debounce`, `defaults`, `defer`, `delay`, `difference`, `drop`,
|
|
* `dropRight`, `dropRightWhile`, `dropWhile`, `filter`, `flatten`, `flattenDeep`,
|
|
* `flow`, `flowRight`, `forEach`, `forEachRight`, `forIn`, `forInRight`,
|
|
* `forOwn`, `forOwnRight`, `functions`, `groupBy`, `indexBy`, `initial`,
|
|
* `intersection`, `invert`, `invoke`, `keys`, `keysIn`, `map`, `mapValues`,
|
|
* `matches`, `memoize`, `merge`, `mixin`, `negate`, `noop`, `omit`, `once`,
|
|
* `pairs`, `partial`, `partialRight`, `partition`, `pick`, `pluck`, `property`,
|
|
* `pull`, `pullAt`, `push`, `range`, `reject`, `remove`, `rest`, `reverse`,
|
|
* `shuffle`, `slice`, `sort`, `sortBy`, `splice`, `take`, `takeRight`,
|
|
* `takeRightWhile`, `takeWhile`, `tap`, `throttle`, `thru`, `times`,
|
|
* `toArray`, `transform`, `union`, `uniq`, `unshift`, `unzip`, `values`,
|
|
* `valuesIn`, `where`, `without`, `wrap`, `xor`, `zip`, and `zipObject`
|
|
*
|
|
* The non-chainable wrapper functions are:
|
|
* `attempt`, `camelCase`, `capitalize`, `clone`, `cloneDeep`, `contains`,
|
|
* `deburr`, endsWith`, `escape`, `escapeRegExp`, `every`, `find`, `findIndex`,
|
|
* `findKey`, `findLast`, `findLastIndex`, `findLastKey`, `findWhere`, `first`,
|
|
* `has`, `identity`, `indexOf`, `isArguments`, `isArray`, `isBoolean`, isDate`,
|
|
* `isElement`, `isEmpty`, `isEqual`, `isError`, `isFinite`, `isFunction`,
|
|
* `isNative`, `isNaN`, `isNull`, `isNumber`, `isObject`, `isPlainObject`,
|
|
* `isRegExp`, `isString`, `isUndefined`, `join`, `kebabCase`, `last`,
|
|
* `lastIndexOf`, `max`, `min`, `noConflict`, `now`, `pad`, `padLeft`,
|
|
* `padRight`, `parseInt`, `pop`, `random`, `reduce`, `reduceRight`, `repeat`,
|
|
* `result`, `runInContext`, `shift`, `size`, `snakeCase`, `some`, `sortedIndex`,
|
|
* `sortedLastIndex`, `startsWith`, `template`, `trim`, `trimLeft`, `trimRight`,
|
|
* `trunc`, `unescape`, `uniqueId`, `value`, and `words`
|
|
*
|
|
* The wrapper function `sample` will return a wrapped value when `n` is
|
|
* provided, otherwise it will return an unwrapped value.
|
|
*
|
|
* Explicit chaining can be enabled by using the `_.chain` method.
|
|
*
|
|
* @name _
|
|
* @constructor
|
|
* @category Chain
|
|
* @param {*} value The value to wrap in a `lodash` instance.
|
|
* @returns {Object} Returns a `lodash` instance.
|
|
* @example
|
|
*
|
|
* var wrapped = _([1, 2, 3]);
|
|
*
|
|
* // returns an unwrapped value
|
|
* wrapped.reduce(function(sum, n) { return sum + n; });
|
|
* // => 6
|
|
*
|
|
* // returns a wrapped value
|
|
* var squares = wrapped.map(function(n) { return n * n; });
|
|
*
|
|
* _.isArray(squares);
|
|
* // => false
|
|
*
|
|
* _.isArray(squares.value());
|
|
* // => true
|
|
*/
|
|
function lodash(value) {
|
|
return (value instanceof lodash)
|
|
? value
|
|
: new lodashWrapper(value);
|
|
}
|
|
|
|
/**
|
|
* A fast path for creating `lodash` wrapper objects.
|
|
*
|
|
* @private
|
|
* @param {*} value The value to wrap in a `lodash` instance.
|
|
* @param {boolean} [chainAll=false] Enable chaining for all methods.
|
|
* @param {Array} [queue=[]] Actions to peform to resolve the unwrapped value.
|
|
* @returns {Object} Returns a `lodash` instance.
|
|
*/
|
|
function lodashWrapper(value, chainAll) {
|
|
this.__chain__ = !!chainAll;
|
|
this.__wrapped__ = value;
|
|
}
|
|
|
|
/**
|
|
* An object environment feature flags.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @type Object
|
|
*/
|
|
var support = {};
|
|
|
|
(function(x) {
|
|
var object = { '0': 1, 'length': 1 };
|
|
|
|
/**
|
|
* Detect if `Array#shift` and `Array#splice` augment array-like objects
|
|
* correctly.
|
|
*
|
|
* Firefox < 10, IE compatibility mode, and IE < 9 have buggy Array `shift()`
|
|
* and `splice()` functions that fail to remove the last element, `value[0]`,
|
|
* of array-like objects even though the `length` property is set to `0`.
|
|
* The `shift()` method is buggy in IE 8 compatibility mode, while `splice()`
|
|
* is buggy regardless of mode in IE < 9 and buggy in compatibility mode
|
|
* in IE 9.
|
|
*
|
|
* @memberOf _.support
|
|
* @type boolean
|
|
*/
|
|
support.spliceObjects = (splice.call(object, 0, 1), !object[0]);
|
|
}(0, 0));
|
|
|
|
/**
|
|
* By default, the template delimiters used by Lo-Dash are similar to those
|
|
* in embedded Ruby (ERB). Change the following template settings to use
|
|
* alternative delimiters.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @type Object
|
|
*/
|
|
lodash.templateSettings = {
|
|
|
|
/**
|
|
* Used to detect `data` property values to be HTML-escaped.
|
|
*
|
|
* @memberOf _.templateSettings
|
|
* @type RegExp
|
|
*/
|
|
'escape': reEscape,
|
|
|
|
/**
|
|
* Used to detect code to be evaluated.
|
|
*
|
|
* @memberOf _.templateSettings
|
|
* @type RegExp
|
|
*/
|
|
'evaluate': reEvaluate,
|
|
|
|
/**
|
|
* Used to detect `data` property values to inject.
|
|
*
|
|
* @memberOf _.templateSettings
|
|
* @type RegExp
|
|
*/
|
|
'interpolate': reInterpolate,
|
|
|
|
/**
|
|
* Used to reference the data object in the template text.
|
|
*
|
|
* @memberOf _.templateSettings
|
|
* @type string
|
|
*/
|
|
'variable': ''
|
|
};
|
|
|
|
/*------------------------------------------------------------------------*/
|
|
|
|
/**
|
|
* The base implementation of `_.assign` without support for argument juggling,
|
|
* multiple sources, and `this` binding.
|
|
*
|
|
* @private
|
|
* @param {Object} object The destination object.
|
|
* @param {Object} source The source object.
|
|
* @param {Function} [customizer] The function to customize assigning values.
|
|
* @returns {Object} Returns the destination object.
|
|
*/
|
|
function baseAssign(object, source, customizer) {
|
|
var index = -1,
|
|
props = keys(source),
|
|
length = props.length;
|
|
|
|
while (++index < length) {
|
|
var key = props[index];
|
|
object[key] = customizer
|
|
? customizer(object[key], source[key], key, object, source)
|
|
: source[key];
|
|
}
|
|
return object;
|
|
}
|
|
|
|
/**
|
|
* The base implementation of `_.bindAll` without support for individual
|
|
* method name arguments.
|
|
*
|
|
* @private
|
|
* @param {Object} object The object to bind and assign the bound methods to.
|
|
* @param {string[]} methodNames The object method names to bind.
|
|
* @returns {Object} Returns `object`.
|
|
*/
|
|
function baseBindAll(object, methodNames) {
|
|
var index = -1,
|
|
length = methodNames.length;
|
|
|
|
while (++index < length) {
|
|
var key = methodNames[index];
|
|
object[key] = createWrapper(object[key], BIND_FLAG, null, object);
|
|
}
|
|
return object;
|
|
}
|
|
|
|
/**
|
|
* The base implementation of `_.callback` without support for creating
|
|
* "_.pluck" and "_.where" style callbacks.
|
|
*
|
|
* @private
|
|
* @param {*} [func=identity] The value to convert to a callback.
|
|
* @param {*} [thisArg] The `this` binding of the created callback.
|
|
* @param {number} [argCount] The number of arguments the callback accepts.
|
|
* @returns {Function} Returns the new function.
|
|
*/
|
|
function baseCallback(func, thisArg, argCount) {
|
|
var type = typeof func;
|
|
|
|
if (type == 'function') {
|
|
if (typeof thisArg == 'undefined') {
|
|
return func;
|
|
}
|
|
switch (argCount) {
|
|
case 1: return function(value) {
|
|
return func.call(thisArg, value);
|
|
};
|
|
case 3: return function(value, index, collection) {
|
|
return func.call(thisArg, value, index, collection);
|
|
};
|
|
case 4: return function(accumulator, value, index, collection) {
|
|
return func.call(thisArg, accumulator, value, index, collection);
|
|
};
|
|
case 5: return function(value, other, key, object, source) {
|
|
return func.call(thisArg, value, other, key, object, source);
|
|
};
|
|
}
|
|
return function() {
|
|
return func.apply(thisArg, arguments);
|
|
};
|
|
}
|
|
if (func == null) {
|
|
return identity;
|
|
}
|
|
// handle "_.pluck" and "_.where" style callback shorthands
|
|
return type == 'object' ? matches(func) : property(func);
|
|
}
|
|
|
|
/**
|
|
* The base implementation of `_.create` without support for assigning
|
|
* properties to the created object.
|
|
*
|
|
* @private
|
|
* @param {Object} prototype The object to inherit from.
|
|
* @returns {Object} Returns the new object.
|
|
*/
|
|
function baseCreate(prototype) {
|
|
return isObject(prototype) ? nativeCreate(prototype) : {};
|
|
}
|
|
// fallback for environments without `Object.create`
|
|
if (!nativeCreate) {
|
|
baseCreate = (function() {
|
|
function Object() {}
|
|
return function(prototype) {
|
|
if (isObject(prototype)) {
|
|
Object.prototype = prototype;
|
|
var result = new Object;
|
|
Object.prototype = null;
|
|
}
|
|
return result || root.Object();
|
|
};
|
|
}());
|
|
}
|
|
|
|
/**
|
|
* The base implementation of `_.difference` which accepts a single array
|
|
* of values to exclude.
|
|
*
|
|
* @private
|
|
* @param {Array} array The array to inspect.
|
|
* @param {Array} values The values to exclude.
|
|
* @returns {Array} Returns the new array of filtered values.
|
|
*/
|
|
function baseDifference(array, values) {
|
|
var length = array ? array.length : 0;
|
|
if (!length) {
|
|
return [];
|
|
}
|
|
var index = -1,
|
|
indexOf = getIndexOf(),
|
|
result = [];
|
|
|
|
while (++index < length) {
|
|
var value = array[index];
|
|
if (indexOf(values, value) < 0) {
|
|
result.push(value);
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* The base implementation of `_.forEach` without support for callback
|
|
* shorthands and `this` binding.
|
|
*
|
|
* @private
|
|
* @param {Array|Object|string} collection The collection to iterate over.
|
|
* @param {Function} iteratee The function invoked per iteration.
|
|
* @returns {Array|Object|string} Returns `collection`.
|
|
*/
|
|
function baseEach(collection, iteratee) {
|
|
var length = collection ? collection.length : 0;
|
|
if (!(typeof length == 'number' && length > -1 && length <= MAX_SAFE_INTEGER)) {
|
|
return baseForOwn(collection, iteratee);
|
|
}
|
|
var index = -1,
|
|
iterable = toObject(collection);
|
|
|
|
while (++index < length) {
|
|
if (iteratee(iterable[index], index, iterable) === BREAK_INDICATOR) {
|
|
break;
|
|
}
|
|
}
|
|
return collection;
|
|
}
|
|
|
|
/**
|
|
* The base implementation of `_.forEachRight` without support for callback
|
|
* shorthands and `this` binding.
|
|
*
|
|
* @private
|
|
* @param {Array|Object|string} collection The collection to iterate over.
|
|
* @param {Function} iteratee The function invoked per iteration.
|
|
* @returns {Array|Object|string} Returns `collection`.
|
|
*/
|
|
function baseEachRight(collection, iteratee) {
|
|
var length = collection ? collection.length : 0;
|
|
if (!(typeof length == 'number' && length > -1 && length <= MAX_SAFE_INTEGER)) {
|
|
return baseForOwnRight(collection, iteratee);
|
|
}
|
|
var iterable = toObject(collection);
|
|
while (length--) {
|
|
if (iteratee(iterable[length], length, iterable) === BREAK_INDICATOR) {
|
|
break;
|
|
}
|
|
}
|
|
return collection;
|
|
}
|
|
|
|
/**
|
|
* The base implementation of `_.every` without support for callback
|
|
* shorthands or `this` binding.
|
|
*
|
|
* @private
|
|
* @param {Array|Object|string} collection The collection to iterate over.
|
|
* @param {Function} predicate The function invoked per iteration.
|
|
* @returns {Array} Returns `true` if all elements pass the predicate check,
|
|
* else `false`
|
|
*/
|
|
function baseEvery(collection, predicate) {
|
|
var result = true;
|
|
|
|
baseEach(collection, function(value, index, collection) {
|
|
result = !!predicate(value, index, collection);
|
|
return result || BREAK_INDICATOR;
|
|
});
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* The base implementation of `_.filter` without support for callback shorthands
|
|
* or `this` binding.
|
|
*
|
|
* @private
|
|
* @param {Array|Object|string} collection The collection to iterate over.
|
|
* @param {Function} predicate The function invoked per iteration.
|
|
* @returns {Array} Returns the new filtered array.
|
|
*/
|
|
function baseFilter(collection, predicate) {
|
|
var result = [];
|
|
|
|
baseEach(collection, function(value, index, collection) {
|
|
if (predicate(value, index, collection)) {
|
|
result.push(value);
|
|
}
|
|
});
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* The base implementation of `_.find`, `_.findLast`, `_.findKey`, and `_.findLastKey`,
|
|
* without support for callback shorthands and `this` binding, which iterates
|
|
* over `collection` using the provided `eachFunc`.
|
|
*
|
|
* @private
|
|
* @param {Array|Object|string} collection The collection to search.
|
|
* @param {Function} predicate The function invoked per iteration.
|
|
* @param {Function} eachFunc The function to iterate over `collection`.
|
|
* @param {boolean} [retKey=false] Specify returning the key of the found
|
|
* element instead of the element itself.
|
|
* @returns {*} Returns the found element or its key, else `undefined`.
|
|
*/
|
|
function baseFind(collection, predicate, eachFunc, retKey) {
|
|
var result;
|
|
|
|
eachFunc(collection, function(value, key, collection) {
|
|
if (predicate(value, key, collection)) {
|
|
result = retKey ? key : value;
|
|
return BREAK_INDICATOR;
|
|
}
|
|
});
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* The base implementation of `_.flatten` with added support for restricting
|
|
* flattening and specifying the start index.
|
|
*
|
|
* @private
|
|
* @param {Array} array The array to flatten.
|
|
* @param {boolean} [isDeep=false] Specify a deep flatten.
|
|
* @param {boolean} [isStrict=false] Restrict flattening to arrays and `arguments` objects.
|
|
* @param {number} [fromIndex=0] The index to start from.
|
|
* @returns {Array} Returns the new flattened array.
|
|
*/
|
|
function baseFlatten(array, isDeep, isStrict, fromIndex) {
|
|
var index = (fromIndex || 0) - 1,
|
|
length = array.length,
|
|
resIndex = -1,
|
|
result = [];
|
|
|
|
while (++index < length) {
|
|
var value = array[index];
|
|
|
|
if (value && typeof value == 'object' && typeof value.length == 'number'
|
|
&& (isArray(value) || isArguments(value))) {
|
|
// recursively flatten arrays (susceptible to call stack limits)
|
|
if (isDeep) {
|
|
value = baseFlatten(value, isDeep, isStrict);
|
|
}
|
|
var valIndex = -1,
|
|
valLength = value.length;
|
|
|
|
result.length += valLength;
|
|
while (++valIndex < valLength) {
|
|
result[++resIndex] = value[valIndex];
|
|
}
|
|
} else if (!isStrict) {
|
|
result[++resIndex] = value;
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* The base implementation of `baseForIn` and `baseForOwn` which iterates
|
|
* over `object` properties returned by `keysFunc` invoking `iteratee` for
|
|
* each property. Iterator functions may exit iteration early by explicitly
|
|
* returning `false`.
|
|
*
|
|
* @private
|
|
* @param {Object} object The object to iterate over.
|
|
* @param {Function} iteratee The function invoked per iteration.
|
|
* @param {Function} keysFunc The function to get the keys of `object`.
|
|
* @returns {Object} Returns `object`.
|
|
*/
|
|
function baseFor(object, iteratee, keysFunc) {
|
|
var index = -1,
|
|
iterable = toObject(object),
|
|
props = keysFunc(object),
|
|
length = props.length;
|
|
|
|
while (++index < length) {
|
|
var key = props[index];
|
|
if (iteratee(iterable[key], key, iterable) === BREAK_INDICATOR) {
|
|
break;
|
|
}
|
|
}
|
|
return object;
|
|
}
|
|
|
|
/**
|
|
* This function is like `baseFor` except that it iterates over properties
|
|
* in the opposite order.
|
|
*
|
|
* @private
|
|
* @param {Object} object The object to iterate over.
|
|
* @param {Function} iteratee The function invoked per iteration.
|
|
* @param {Function} keysFunc The function to get the keys of `object`.
|
|
* @returns {Object} Returns `object`.
|
|
*/
|
|
function baseForRight(object, iteratee, keysFunc) {
|
|
var iterable = toObject(object),
|
|
props = keysFunc(object),
|
|
length = props.length;
|
|
|
|
while (length--) {
|
|
var key = props[length];
|
|
if (iteratee(iterable[key], key, iterable) === BREAK_INDICATOR) {
|
|
break;
|
|
}
|
|
}
|
|
return object;
|
|
}
|
|
|
|
/**
|
|
* The base implementation of `_.forIn` without support for callback
|
|
* shorthands and `this` binding.
|
|
*
|
|
* @private
|
|
* @param {Object} object The object to iterate over.
|
|
* @param {Function} iteratee The function invoked per iteration.
|
|
* @returns {Object} Returns `object`.
|
|
*/
|
|
function baseForIn(object, iteratee) {
|
|
return baseFor(object, iteratee, keysIn);
|
|
}
|
|
|
|
/**
|
|
* The base implementation of `_.forOwn` without support for callback
|
|
* shorthands and `this` binding.
|
|
*
|
|
* @private
|
|
* @param {Object} object The object to iterate over.
|
|
* @param {Function} iteratee The function invoked per iteration.
|
|
* @returns {Object} Returns `object`.
|
|
*/
|
|
function baseForOwn(object, iteratee) {
|
|
return baseFor(object, iteratee, keys);
|
|
}
|
|
|
|
/**
|
|
* The base implementation of `_.forOwnRight` without support for callback
|
|
* shorthands and `this` binding.
|
|
*
|
|
* @private
|
|
* @param {Object} object The object to iterate over.
|
|
* @param {Function} iteratee The function invoked per iteration.
|
|
* @returns {Object} Returns `object`.
|
|
*/
|
|
function baseForOwnRight(object, iteratee) {
|
|
return baseForRight(object, iteratee, keys);
|
|
}
|
|
|
|
/**
|
|
* The base implementation of `_.functions` which creates an array of
|
|
* `object` function property names filtered from those provided.
|
|
*
|
|
* @private
|
|
* @param {Object} object The object to inspect.
|
|
* @param {Array} props The property names to filter.
|
|
* @returns {Array} Returns the new array of filtered property names.
|
|
*/
|
|
function baseFunctions(object, props) {
|
|
var index = -1,
|
|
length = props.length,
|
|
resIndex = -1,
|
|
result = [];
|
|
|
|
while (++index < length) {
|
|
var key = props[index];
|
|
if (isFunction(object[key])) {
|
|
result[++resIndex] = key;
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* The base implementation of `_.isEqual`, without support for `thisArg`
|
|
* binding, which allows partial "_.where" style comparisons.
|
|
*
|
|
* @private
|
|
* @param {*} value The value to compare to `other`.
|
|
* @param {*} other The value to compare to `value`.
|
|
* @param {Function} [customizer] The function to customize comparing values.
|
|
* @param {boolean} [isWhere=false] Specify performing partial comparisons.
|
|
* @param {Array} [stackA=[]] Tracks traversed `value` objects.
|
|
* @param {Array} [stackB=[]] Tracks traversed `other` objects.
|
|
* @returns {boolean} Returns `true` if the values are equivalent, else `false`.
|
|
*/
|
|
function baseIsEqual(value, other, stackA, stackB) {
|
|
if (value === other) {
|
|
return value !== 0 || (1 / value == 1 / other);
|
|
}
|
|
var valType = typeof value,
|
|
othType = typeof other;
|
|
|
|
if (value === value && (value == null || other == null ||
|
|
(valType != 'function' && valType != 'object' && othType != 'function' && othType != 'object'))) {
|
|
return false;
|
|
}
|
|
var valClass = toString.call(value),
|
|
othClass = toString.call(other);
|
|
|
|
if (valClass != othClass) {
|
|
return false;
|
|
}
|
|
switch (valClass) {
|
|
case boolClass:
|
|
case dateClass:
|
|
return +value == +other;
|
|
|
|
case numberClass:
|
|
return value != +value
|
|
? other != +other
|
|
: (value == 0 ? (1 / value == 1 / other) : value == +other);
|
|
|
|
case regexpClass:
|
|
case stringClass:
|
|
return value == String(other);
|
|
}
|
|
var isArr = arrayLikeClasses[valClass];
|
|
if (!isArr) {
|
|
if (valClass != objectClass) {
|
|
return false;
|
|
}
|
|
var valWrapped = value instanceof lodash,
|
|
othWrapped = other instanceof lodash;
|
|
|
|
if (valWrapped || othWrapped) {
|
|
return baseIsEqual(valWrapped ? value.__wrapped__ : value, othWrapped ? other.__wrapped__ : other, stackA, stackB);
|
|
}
|
|
var hasValCtor = hasOwnProperty.call(value, 'constructor'),
|
|
hasOthCtor = hasOwnProperty.call(other, 'constructor');
|
|
|
|
if (hasValCtor != hasOthCtor) {
|
|
return false;
|
|
}
|
|
if (!hasValCtor) {
|
|
var valCtor = value.constructor,
|
|
othCtor = other.constructor;
|
|
|
|
if (valCtor != othCtor && ('constructor' in value && 'constructor' in other) &&
|
|
!(typeof valCtor == 'function' && valCtor instanceof valCtor &&
|
|
typeof othCtor == 'function' && othCtor instanceof othCtor)) {
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
stackA || (stackA = []);
|
|
stackB || (stackB = []);
|
|
|
|
var length = stackA.length;
|
|
while (length--) {
|
|
if (stackA[length] == value) {
|
|
return stackB[length] == other;
|
|
}
|
|
}
|
|
stackA.push(value);
|
|
stackB.push(other);
|
|
|
|
if (isArr) {
|
|
length = value.length;
|
|
var result = length == other.length;
|
|
|
|
if (result) {
|
|
while (length--) {
|
|
result = baseIsEqual(value[length], other[length], stackA, stackB);
|
|
if (!result) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
var props = keys(value);
|
|
length = props.length;
|
|
result = length == keys(other).length;
|
|
|
|
if (result) {
|
|
while (length--) {
|
|
var key = props[length];
|
|
result = hasOwnProperty.call(other, key) && baseIsEqual(value[key], other[key], stackA, stackB);
|
|
if (!result) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
stackA.pop();
|
|
stackB.pop();
|
|
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* The base implementation of `_.invoke` which requires additional arguments
|
|
* be provided as an array of arguments rather than individually.
|
|
*
|
|
* @private
|
|
* @param {Array|Object|string} collection The collection to iterate over.
|
|
* @param {Function|string} methodName The name of the method to invoke or
|
|
* the function invoked per iteration.
|
|
* @param {Array} [args] The arguments to invoke the method with.
|
|
* @returns {Array} Returns the array of results.
|
|
*/
|
|
function baseInvoke(collection, methodName, args) {
|
|
var index = -1,
|
|
isFunc = typeof methodName == 'function',
|
|
length = collection ? collection.length : 0,
|
|
result = [];
|
|
|
|
if (typeof length == 'number' && length > -1 && length <= MAX_SAFE_INTEGER) {
|
|
result.length = length;
|
|
}
|
|
baseEach(collection, function(value) {
|
|
var func = isFunc ? methodName : (value != null && value[methodName]);
|
|
result[++index] = func ? func.apply(value, args) : undefined;
|
|
});
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* The base implementation of `_.map` without support for callback shorthands
|
|
* or `this` binding.
|
|
*
|
|
* @private
|
|
* @param {Array|Object|string} collection The collection to iterate over.
|
|
* @param {Function} iteratee The function invoked per iteration.
|
|
* @returns {Array} Returns the new mapped array.
|
|
*/
|
|
function baseMap(collection, iteratee) {
|
|
var result = [];
|
|
|
|
baseEach(collection, function(value, key, collection) {
|
|
result.push(iteratee(value, key, collection));
|
|
});
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* The base implementation of `_.partial` and `_.partialRight` which accepts
|
|
* an array of arguments to partially apply and handles resolving the arity
|
|
* of `func`.
|
|
*
|
|
* @private
|
|
* @param {Function} func The function to partially apply arguments to.
|
|
* @param {number} bitmask The bitmask of flags to compose.
|
|
* @param {Array} args The arguments to be partially applied.
|
|
* @param {*} [thisArg] The `this` binding of `func`.
|
|
* @returns {Function} Returns the new partially applied function.
|
|
*/
|
|
function basePartial(func, bitmask, args, holders, thisArg) {
|
|
if (func) {
|
|
var arity = func.length;
|
|
|
|
arity = nativeMax(arity - args.length, 0);
|
|
}
|
|
return (bitmask & PARTIAL_FLAG)
|
|
? createWrapper(func, bitmask, arity, thisArg, args, holders)
|
|
: createWrapper(func, bitmask, arity, thisArg, null, null, args, holders);
|
|
}
|
|
|
|
/**
|
|
* The base implementation of `_.random` without support for argument juggling
|
|
* and returning floating-point numbers.
|
|
*
|
|
* @private
|
|
* @param {number} min The minimum possible value.
|
|
* @param {number} max The maximum possible value.
|
|
* @returns {number} Returns the random number.
|
|
*/
|
|
function baseRandom(min, max) {
|
|
return min + floor(nativeRandom() * (max - min + 1));
|
|
}
|
|
|
|
/**
|
|
* The base implementation of `_.reduce` and `_.reduceRight` without support
|
|
* for callback shorthands or `this` binding, which iterates over `collection`
|
|
* usingthe provided `eachFunc`.
|
|
*
|
|
* @private
|
|
* @param {Array|Object|string} collection The collection to iterate over.
|
|
* @param {Function} iteratee The function invoked per iteration.
|
|
* @param {*} accumulator The initial value.
|
|
* @param {boolean} initFromCollection Specify using the first or last element
|
|
* of `collection` as the initial value.
|
|
* @param {Function} eachFunc The function to iterate over `collection`.
|
|
* @returns {*} Returns the accumulated value.
|
|
*/
|
|
function baseReduce(collection, iteratee, accumulator, initFromCollection, eachFunc) {
|
|
eachFunc(collection, function(value, index, collection) {
|
|
accumulator = initFromCollection
|
|
? (initFromCollection = false, value)
|
|
: iteratee(accumulator, value, index, collection)
|
|
});
|
|
return accumulator;
|
|
}
|
|
|
|
/**
|
|
* The base implementation of `_.some` without support for callback shorthands
|
|
* or `this` binding.
|
|
*
|
|
* @private
|
|
* @param {Array|Object|string} collection The collection to iterate over.
|
|
* @param {Function} predicate The function invoked per iteration.
|
|
* @returns {boolean} Returns `true` if any element passes the predicate check,
|
|
* else `false`.
|
|
*/
|
|
function baseSome(collection, predicate) {
|
|
var result;
|
|
|
|
baseEach(collection, function(value, index, collection) {
|
|
result = predicate(value, index, collection);
|
|
return result && BREAK_INDICATOR;
|
|
});
|
|
return !!result;
|
|
}
|
|
|
|
/**
|
|
* The base implementation of `_.sortedIndex` and `_.sortedLastIndex` without
|
|
* support for callback shorthands and `this` binding.
|
|
*
|
|
* @private
|
|
* @param {Array} array The array to inspect.
|
|
* @param {*} value The value to evaluate.
|
|
* @param {Function} iteratee The function invoked per iteration.
|
|
* @param {boolean} [retHighest=false] Specify returning the highest, instead
|
|
* of the lowest, index at which a value should be inserted into `array`.
|
|
* @returns {number} Returns the index at which `value` should be inserted
|
|
* into `array`.
|
|
*/
|
|
function baseSortedIndex(array, value, iteratee, retHighest) {
|
|
var low = 0,
|
|
high = array ? array.length : low;
|
|
|
|
value = iteratee(value);
|
|
|
|
var valIsNaN = value !== value,
|
|
valIsUndef = typeof value == 'undefined';
|
|
|
|
while (low < high) {
|
|
var mid = floor((low + high) / 2),
|
|
computed = iteratee(array[mid]),
|
|
isReflexive = computed === computed;
|
|
|
|
if (valIsNaN) {
|
|
var setLow = isReflexive || retHighest;
|
|
} else if (valIsUndef) {
|
|
setLow = isReflexive && (retHighest || typeof computed != 'undefined');
|
|
} else {
|
|
setLow = retHighest ? (computed <= value) : (computed < value);
|
|
}
|
|
if (setLow) {
|
|
low = mid + 1;
|
|
} else {
|
|
high = mid;
|
|
}
|
|
}
|
|
return nativeMin(high, MAX_ARRAY_INDEX);
|
|
}
|
|
|
|
/**
|
|
* The base implementation of `_.uniq` without support for callback shorthands
|
|
* and `this` binding.
|
|
*
|
|
* @private
|
|
* @param {Array} array The array to inspect.
|
|
* @param {Function} [iteratee] The function invoked per iteration.
|
|
* @returns {Array} Returns the new duplicate-value-free array.
|
|
*/
|
|
function baseUniq(array, iteratee) {
|
|
var index = -1,
|
|
indexOf = getIndexOf(),
|
|
length = array.length,
|
|
result = [],
|
|
seen = iteratee ? [] : result;
|
|
|
|
while (++index < length) {
|
|
var value = array[index],
|
|
computed = iteratee ? iteratee(value, index, array) : value;
|
|
|
|
if (indexOf(seen, computed) < 0) {
|
|
if (iteratee) {
|
|
seen.push(computed);
|
|
}
|
|
result.push(value);
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* The base implementation of `_.values` and `_.valuesIn` which creates an
|
|
* array of `object` property values corresponding to the property names
|
|
* returned by `keysFunc`.
|
|
*
|
|
* @private
|
|
* @param {Object} object The object to inspect.
|
|
* @param {Function} keysFunc The function to get the keys of `object`.
|
|
* @returns {Object} Returns the array of property values.
|
|
*/
|
|
function baseValues(object, keysFunc) {
|
|
var index = -1,
|
|
props = keysFunc(object),
|
|
length = props.length,
|
|
result = Array(length);
|
|
|
|
while (++index < length) {
|
|
result[index] = object[props[index]];
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* Creates an array that is the composition of partially applied arguments,
|
|
* placeholders, and provided arguments into a single array of arguments.
|
|
*
|
|
* @private
|
|
* @param {Array} partialArgs The arguments to prepend to those provided.
|
|
* @param {Array} partialHolders The `partialArgs` placeholder indexes.
|
|
* @param {Array|Object} args The provided arguments.
|
|
* @returns {Array} Returns the new array of composed arguments.
|
|
*/
|
|
function composeArgs(partialArgs, partialHolders, args) {
|
|
var holdersLength = partialHolders.length,
|
|
argsIndex = -1,
|
|
argsLength = nativeMax(args.length - holdersLength, 0),
|
|
leftIndex = -1,
|
|
leftLength = partialArgs.length,
|
|
result = Array(argsLength + leftLength);
|
|
|
|
while (++leftIndex < leftLength) {
|
|
result[leftIndex] = partialArgs[leftIndex];
|
|
}
|
|
while (++argsIndex < holdersLength) {
|
|
result[partialHolders[argsIndex]] = args[argsIndex];
|
|
}
|
|
while (argsLength--) {
|
|
result[leftIndex++] = args[argsIndex++];
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* Creates a function that aggregates a collection, creating an accumulator
|
|
* object composed from the results of running each element in the collection
|
|
* through `iteratee`. The given setter function sets the keys and values of
|
|
* the accumulator object. If `initializer` is provided it is used to initialize
|
|
* the accumulator object.
|
|
*
|
|
* @private
|
|
* @param {Function} setter The function to set keys and values of the accumulator object.
|
|
* @param {Function} [initializer] The function to initialize the accumulator object.
|
|
* @returns {Function} Returns the new aggregator function.
|
|
*/
|
|
function createAggregator(setter, initializer) {
|
|
return function(collection, iteratee, thisArg) {
|
|
iteratee = baseCallback(iteratee, thisArg, 3);
|
|
|
|
var result = initializer ? initializer() : {};
|
|
if (isArray(collection)) {
|
|
var index = -1,
|
|
length = collection.length;
|
|
|
|
while (++index < length) {
|
|
var value = collection[index];
|
|
setter(result, value, iteratee(value, index, collection), collection);
|
|
}
|
|
} else {
|
|
baseEach(collection, function(value, key, collection) {
|
|
setter(result, value, iteratee(value, key, collection), collection);
|
|
});
|
|
}
|
|
return result;
|
|
};
|
|
}
|
|
|
|
/**
|
|
* Creates a function that wraps `func` and invokes it with the `this`
|
|
* binding of `thisArg`.
|
|
*
|
|
* @private
|
|
* @param {Function} func The function to bind.
|
|
* @param {*} [thisArg] The `this` binding of `func`.
|
|
* @returns {Function} Returns the new wrapped function.
|
|
*/
|
|
function createBindWrapper(func, thisArg) {
|
|
var Ctor = createCtorWrapper(func);
|
|
|
|
function wrapper() {
|
|
return (this instanceof wrapper ? Ctor : func).apply(thisArg, arguments);
|
|
}
|
|
return wrapper;
|
|
}
|
|
|
|
/**
|
|
* Creates a function that produces an instance of `Ctor` regardless of
|
|
* whether it was invoked as part of a `new` expression or by `call` or `apply`.
|
|
*
|
|
* @private
|
|
* @param {Function} Ctor The constructor to wrap.
|
|
* @returns {Function} Returns the new function.
|
|
*/
|
|
function createCtorWrapper(Ctor) {
|
|
return function() {
|
|
var thisBinding = baseCreate(Ctor.prototype),
|
|
result = Ctor.apply(thisBinding, arguments);
|
|
|
|
// mimic the constructor's `return` behavior
|
|
// http://es5.github.io/#x13.2.2
|
|
return isObject(result) ? result : thisBinding;
|
|
};
|
|
}
|
|
|
|
/**
|
|
* Creates a function that wraps `func` and invokes it with optional `this`
|
|
* binding of, partial application, and currying.
|
|
*
|
|
* @private
|
|
* @param {Function|string} func The function or method name to reference.
|
|
* @param {number} bitmask The bitmask of flags. See `createWrapper` for more details.
|
|
* @param {number} arity The arity of `func`.
|
|
* @param {*} [thisArg] The `this` binding of `func`.
|
|
* @param {Array} [partialArgs] The arguments to prepend to those provided to the new function.
|
|
* @param {Array} [partialHolders] The `partialArgs` placeholder indexes.
|
|
* @param {Array} [partialRightArgs] The arguments to append to those provided to the new function.
|
|
* @param {Array} [partialRightHolders] The `partialRightArgs` placeholder indexes.
|
|
* @returns {Function} Returns the new function.
|
|
*/
|
|
function createHybridWrapper(func, bitmask, arity, thisArg, partialArgs, partialHolders, partialRightArgs, partialRightHolders) {
|
|
var isBind = bitmask & BIND_FLAG,
|
|
isBindKey = bitmask & BIND_KEY_FLAG,
|
|
isCurry = bitmask & CURRY_FLAG,
|
|
isCurryRight = bitmask & CURRY_RIGHT_FLAG,
|
|
isCurryBound = bitmask & CURRY_BOUND_FLAG;
|
|
|
|
var Ctor = !isBindKey && createCtorWrapper(func),
|
|
key = func;
|
|
|
|
function wrapper() {
|
|
var length = arguments.length,
|
|
index = length,
|
|
args = Array(length);
|
|
|
|
while (index--) {
|
|
args[index] = arguments[index];
|
|
}
|
|
if (partialArgs) {
|
|
args = composeArgs(partialArgs, partialHolders, args);
|
|
}
|
|
var thisBinding = isBind ? thisArg : this;
|
|
return (this instanceof wrapper ? (Ctor || createCtorWrapper(func)) : func).apply(thisBinding, args);
|
|
}
|
|
return wrapper;
|
|
}
|
|
|
|
/**
|
|
* Creates a function that wraps `func` and invokes it with the optional `this`
|
|
* binding of `thisArg` and the `partialArgs` prepended to those provided to
|
|
* the wrapper.
|
|
*
|
|
* @private
|
|
* @param {Function} func The function to partially apply arguments to.
|
|
* @param {number} bitmask The bitmask of flags. See `createWrapper` for more details.
|
|
* @param {Array} partialArgs The arguments to prepend to those provided to the new function.
|
|
* @param {*} [thisArg] The `this` binding of `func`.
|
|
* @returns {Function} Returns the new bound function.
|
|
*/
|
|
function createPartialWrapper(func, bitmask, partialArgs, thisArg) {
|
|
var isBind = bitmask & BIND_FLAG,
|
|
Ctor = createCtorWrapper(func);
|
|
|
|
function wrapper() {
|
|
// avoid `arguments` object use disqualifying optimizations by
|
|
// converting it to an array before passing it to `composeArgs`
|
|
var argsIndex = -1,
|
|
argsLength = arguments.length,
|
|
leftIndex = -1,
|
|
leftLength = partialArgs.length,
|
|
args = Array(argsLength + leftLength);
|
|
|
|
while (++leftIndex < leftLength) {
|
|
args[leftIndex] = partialArgs[leftIndex];
|
|
}
|
|
while (argsLength--) {
|
|
args[leftIndex++] = arguments[++argsIndex];
|
|
}
|
|
return (this instanceof wrapper ? Ctor : func).apply(isBind ? thisArg : this, args);
|
|
}
|
|
return wrapper;
|
|
}
|
|
|
|
/**
|
|
* Creates a function that either curries or invokes `func` with optional
|
|
* `this` binding and partially applied arguments.
|
|
*
|
|
* @private
|
|
* @param {Function|string} func The function or method name to reference.
|
|
* @param {number} bitmask The bitmask of flags.
|
|
* The bitmask may be composed of the following flags:
|
|
* 1 - `_.bind`
|
|
* 2 - `_.bindKey`
|
|
* 4 - `_.curry`
|
|
* 8 - `_.curryRight`
|
|
* 16 - `_.curry` or `_.curryRight` of a bound function
|
|
* 32 - `_.partial`
|
|
* 64 - `_.partialRight`
|
|
* @param {number} arity The arity of `func`.
|
|
* @param {*} [thisArg] The `this` binding of `func`.
|
|
* @param {Array} [partialArgs] The arguments to prepend to those provided to the new function.
|
|
* @param {Array} [partialHolders] The `partialArgs` placeholder indexes.
|
|
* @param {Array} [partialRightArgs] The arguments to append to those provided to the new function.
|
|
* @param {Array} [partialRightHolders] The `partialRightArgs` placeholder indexes.
|
|
* @returns {Function} Returns the new function.
|
|
*/
|
|
function createWrapper(func, bitmask, arity, thisArg, partialArgs, partialHolders, partialRightArgs, partialRightHolders) {
|
|
var isBindKey = bitmask & BIND_KEY_FLAG;
|
|
if (!isFunction(func)) {
|
|
throw new TypeError(FUNC_ERROR_TEXT);
|
|
}
|
|
var isPartial = bitmask & PARTIAL_FLAG;
|
|
if (isPartial && !partialArgs.length) {
|
|
bitmask &= ~PARTIAL_FLAG;
|
|
isPartial = false;
|
|
partialArgs = partialHolders = null;
|
|
}
|
|
if (arity == null) {
|
|
arity = func.length;
|
|
}
|
|
if (bitmask == BIND_FLAG) {
|
|
var result = createBindWrapper(func, thisArg);
|
|
} else if ((bitmask == PARTIAL_FLAG || bitmask == (BIND_FLAG | PARTIAL_FLAG)) && !partialHolders.length) {
|
|
result = createPartialWrapper(func, bitmask, partialArgs, thisArg);
|
|
} else {
|
|
result = createHybridWrapper(func, bitmask, arity, thisArg, partialArgs, partialHolders, partialRightArgs, partialRightHolders);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* Gets the appropriate "indexOf" function. If the `_.indexOf` method is
|
|
* customized this function returns the custom method, otherwise it returns
|
|
* the `baseIndexOf` function. If arguments are provided the chosen function
|
|
* is invoked with them and its result is returned.
|
|
*
|
|
* @private
|
|
* @returns {Function|number} Returns the chosen function or its result.
|
|
*/
|
|
function getIndexOf(collection, target, fromIndex) {
|
|
var result = lodash.indexOf || indexOf;
|
|
result = result === indexOf ? baseIndexOf : result;
|
|
return collection ? result(collection, target, fromIndex) : result;
|
|
}
|
|
|
|
/**
|
|
* A specialized version of `_.pick` that picks `object` properties
|
|
* specified by the `props` array.
|
|
*
|
|
* @private
|
|
* @param {Object} object The source object.
|
|
* @param {string[]} props The property names to pick.
|
|
* @returns {Object} Returns the new object.
|
|
*/
|
|
function pickByArray(object, props) {
|
|
object = toObject(object);
|
|
|
|
var index = -1,
|
|
length = props.length,
|
|
result = {};
|
|
|
|
while (++index < length) {
|
|
var key = props[index];
|
|
if (key in object) {
|
|
result[key] = object[key];
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* A specialized version of `_.pick` that picks `object` properties `predicate`
|
|
* returns truthy for.
|
|
*
|
|
* @private
|
|
* @param {Object} object The source object.
|
|
* @param {Function} predicate The function invoked per iteration.
|
|
* @returns {Object} Returns the new object.
|
|
*/
|
|
function pickByCallback(object, predicate) {
|
|
var result = {};
|
|
|
|
baseForIn(object, function(value, key, object) {
|
|
if (predicate(value, key, object)) {
|
|
result[key] = value;
|
|
}
|
|
});
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* A fallback implementation of `Object.keys` which creates an array of the
|
|
* own enumerable property names of `object`.
|
|
*
|
|
* @private
|
|
* @param {Object} object The object to inspect.
|
|
* @returns {Array} Returns the array of property names.
|
|
*/
|
|
function shimKeys(object) {
|
|
var index = -1,
|
|
props = keysIn(object),
|
|
length = props.length,
|
|
result = [];
|
|
|
|
while (++index < length) {
|
|
var key = props[index];
|
|
if (hasOwnProperty.call(object, key)) {
|
|
result.push(key);
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* Converts `value` to an array-like object if it is not one.
|
|
*
|
|
* @private
|
|
* @param {*} value The value to process.
|
|
* @returns {Array|Object} Returns the array-like object.
|
|
*/
|
|
function toIterable(value) {
|
|
if (value == null) {
|
|
return [];
|
|
}
|
|
var length = value.length;
|
|
if (!(typeof length == 'number' && length > -1 && length <= MAX_SAFE_INTEGER)) {
|
|
return values(value);
|
|
}
|
|
return isObject(value) ? value : Object(value);
|
|
}
|
|
|
|
/**
|
|
* Converts `value` to an object if it is not one.
|
|
*
|
|
* @private
|
|
* @param {*} value The value to process.
|
|
* @returns {Object} Returns the object.
|
|
*/
|
|
function toObject(value) {
|
|
return isObject(value) ? value : Object(value);
|
|
}
|
|
|
|
/*------------------------------------------------------------------------*/
|
|
|
|
/**
|
|
* Creates an array with all falsey values removed. The values `false`, `null`,
|
|
* `0`, `""`, `undefined`, and `NaN` are all falsey.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Array
|
|
* @param {Array} array The array to compact.
|
|
* @returns {Array} Returns the new array of filtered values.
|
|
* @example
|
|
*
|
|
* _.compact([0, 1, false, 2, '', 3]);
|
|
* // => [1, 2, 3]
|
|
*/
|
|
function compact(array) {
|
|
var index = -1,
|
|
length = array ? array.length : 0,
|
|
resIndex = -1,
|
|
result = [];
|
|
|
|
while (++index < length) {
|
|
var value = array[index];
|
|
if (value) {
|
|
result[++resIndex] = value;
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* Creates an array excluding all values of the provided arrays using
|
|
* `SameValueZero` for equality comparisons.
|
|
*
|
|
* **Note:** `SameValueZero` is like strict equality, e.g. `===`, except that
|
|
* `NaN` matches `NaN`. See the [ES6 spec](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-samevaluezero)
|
|
* for more details.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Array
|
|
* @param {Array} array The array to inspect.
|
|
* @param {...Array} [values] The arrays of values to exclude.
|
|
* @returns {Array} Returns the new array of filtered values.
|
|
* @example
|
|
*
|
|
* _.difference([1, 2, 3], [5, 2, 10]);
|
|
* // => [1, 3]
|
|
*/
|
|
function difference() {
|
|
var index = -1,
|
|
length = arguments.length;
|
|
|
|
while (++index < length) {
|
|
var value = arguments[index];
|
|
if (isArray(value) || isArguments(value)) {
|
|
break;
|
|
}
|
|
}
|
|
return baseDifference(arguments[index], baseFlatten(arguments, false, true, ++index));
|
|
}
|
|
|
|
/**
|
|
* Creates a slice of `array` with `n` elements dropped from the beginning.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @type Function
|
|
* @category Array
|
|
* @param {Array} array The array to query.
|
|
* @param {number} [n=1] The number of elements to drop.
|
|
* @param- {Object} [guard] Enables use as a callback for functions like `_.map`.
|
|
* @returns {Array} Returns the slice of `array`.
|
|
* @example
|
|
*
|
|
* _.drop([1, 2, 3], 1);
|
|
* // => [2, 3]
|
|
*
|
|
* _.drop([1, 2, 3], 2);
|
|
* // => [3]
|
|
*
|
|
* _.drop([1, 2, 3], 5);
|
|
* // => []
|
|
*
|
|
* _.drop([1, 2, 3], 0);
|
|
* // => [1, 2, 3]
|
|
*/
|
|
var drop = rest;
|
|
|
|
/**
|
|
* This method is like `_.find` except that it returns the index of the first
|
|
* element `predicate` returns truthy for, instead of the element itself.
|
|
*
|
|
* If a property name is provided for `predicate` the created "_.pluck" style
|
|
* callback returns the property value of the given element.
|
|
*
|
|
* If an object is provided for `predicate` the created "_.where" style callback
|
|
* returns `true` for elements that have the properties of the given object,
|
|
* else `false`.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Array
|
|
* @param {Array} array The array to search.
|
|
* @param {Function|Object|string} [predicate=identity] The function invoked
|
|
* per iteration. If a property name or object is provided it is used to
|
|
* create a "_.pluck" or "_.where" style callback respectively.
|
|
* @param {*} [thisArg] The `this` binding of `predicate`.
|
|
* @returns {number} Returns the index of the found element, else `-1`.
|
|
* @example
|
|
*
|
|
* var users = [
|
|
* { 'user': 'barney', 'age': 36 },
|
|
* { 'user': 'fred', 'age': 40, 'blocked': true },
|
|
* { 'user': 'pebbles', 'age': 1 }
|
|
* ];
|
|
*
|
|
* _.findIndex(users, function(chr) {
|
|
* return chr.age < 20;
|
|
* });
|
|
* // => 2
|
|
*
|
|
* // using "_.where" callback shorthand
|
|
* _.findIndex(users, { 'age': 36 });
|
|
* // => 0
|
|
*
|
|
* // using "_.pluck" callback shorthand
|
|
* _.findIndex(users, 'blocked');
|
|
* // => 1
|
|
*/
|
|
function findIndex(array, predicate, thisArg) {
|
|
var index = -1,
|
|
length = array ? array.length : 0;
|
|
|
|
predicate = baseCallback(predicate, thisArg, 3);
|
|
while (++index < length) {
|
|
if (predicate(array[index], index, array)) {
|
|
return index;
|
|
}
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
/**
|
|
* Gets the first element of `array`.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @alias head
|
|
* @category Array
|
|
* @param {Array} array The array to query.
|
|
* @returns {*} Returns the first element of `array`.
|
|
* @example
|
|
*
|
|
* _.first([1, 2, 3]);
|
|
* // => 1
|
|
*
|
|
* _.first([]);
|
|
* // => undefined
|
|
*/
|
|
function first(array, n, guard) {
|
|
if (n == null || guard) {
|
|
return array ? array[0] : undefined;
|
|
}
|
|
return slice(array, 0, n < 0 ? 0 : n);
|
|
}
|
|
|
|
/**
|
|
* Flattens a nested array. If `isDeep` is `true` the array is recursively
|
|
* flattened, otherwise it is only flattened a single level.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Array
|
|
* @param {Array} array The array to flatten.
|
|
* @param {boolean} [isDeep=false] Specify a deep flatten.
|
|
* @param- {Object} [guard] Enables use as a callback for functions like `_.map`.
|
|
* @returns {Array} Returns the new flattened array.
|
|
* @example
|
|
*
|
|
* _.flatten([1, [2], [3, [[4]]]]);
|
|
* // => [1, 2, 3, [[4]]];
|
|
*
|
|
* // using `isDeep`
|
|
* _.flatten([1, [2], [3, [[4]]]], true);
|
|
* // => [1, 2, 3, 4];
|
|
*/
|
|
function flatten(array, isDeep, guard) {
|
|
var length = array ? array.length : 0;
|
|
return length ? baseFlatten(array, guard ? true : !isDeep) : [];
|
|
}
|
|
|
|
/**
|
|
* Gets the index at which the first occurrence of `value` is found in `array`
|
|
* using `SameValueZero` for equality comparisons. If `fromIndex` is negative,
|
|
* it is used as the offset from the end of the collection. If `array` is
|
|
* sorted providing `true` for `fromIndex` performs a faster binary search.
|
|
*
|
|
* **Note:** `SameValueZero` is like strict equality, e.g. `===`, except that
|
|
* `NaN` matches `NaN`. See the [ES6 spec](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-samevaluezero)
|
|
* for more details.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Array
|
|
* @param {Array} array The array to search.
|
|
* @param {*} value The value to search for.
|
|
* @param {boolean|number} [fromIndex=0] The index to search from or `true`
|
|
* to perform a binary search on a sorted array.
|
|
* @returns {number} Returns the index of the matched value, else `-1`.
|
|
* @example
|
|
*
|
|
* _.indexOf([1, 2, 3, 1, 2, 3], 2);
|
|
* // => 1
|
|
*
|
|
* // using `fromIndex`
|
|
* _.indexOf([1, 2, 3, 1, 2, 3], 2, 3);
|
|
* // => 4
|
|
*
|
|
* // performing a binary search
|
|
* _.indexOf([4, 4, 5, 5, 6, 6], 5, true);
|
|
* // => 2
|
|
*/
|
|
function indexOf(array, value, fromIndex) {
|
|
var length = array ? array.length : 0;
|
|
if (!length) {
|
|
return -1;
|
|
}
|
|
if (typeof fromIndex == 'number') {
|
|
fromIndex = fromIndex < 0 ? nativeMax(length + fromIndex, 0) : (fromIndex || 0);
|
|
} else if (fromIndex) {
|
|
var index = sortedIndex(array, value);
|
|
return array[index] === value ? index : -1;
|
|
}
|
|
return baseIndexOf(array, value, fromIndex);
|
|
}
|
|
|
|
/**
|
|
* Gets all but the last element of `array`.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Array
|
|
* @param {Array} array The array to query.
|
|
* @returns {Array} Returns the slice of `array`.
|
|
* @example
|
|
*
|
|
* _.initial([1, 2, 3]);
|
|
* // => [1, 2]
|
|
*/
|
|
function initial(array, n, guard) {
|
|
var length = array ? array.length : 0;
|
|
if (n == null || guard) {
|
|
n = 1;
|
|
}
|
|
n = length - (n || 0);
|
|
return slice(array, 0, n < 0 ? 0 : n);
|
|
}
|
|
|
|
/**
|
|
* Creates an array of unique values present in all provided arrays using
|
|
* `SameValueZero` for equality comparisons.
|
|
*
|
|
* **Note:** `SameValueZero` is like strict equality, e.g. `===`, except that
|
|
* `NaN` matches `NaN`. See the [ES6 spec](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-samevaluezero)
|
|
* for more details.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Array
|
|
* @param {...Array} [arrays] The arrays to inspect.
|
|
* @returns {Array} Returns the new array of shared values.
|
|
* @example
|
|
*
|
|
* _.intersection([1, 2, 3], [5, 2, 1, 4], [2, 1]);
|
|
* // => [1, 2]
|
|
*/
|
|
function intersection() {
|
|
var args = [],
|
|
argsIndex = -1,
|
|
argsLength = arguments.length;
|
|
|
|
while (++argsIndex < argsLength) {
|
|
var value = arguments[argsIndex];
|
|
if (isArray(value) || isArguments(value)) {
|
|
args.push(value);
|
|
}
|
|
}
|
|
argsLength = args.length;
|
|
var array = args[0],
|
|
index = -1,
|
|
indexOf = getIndexOf(),
|
|
length = array ? array.length : 0,
|
|
result = [];
|
|
|
|
outer:
|
|
while (++index < length) {
|
|
value = array[index];
|
|
if (indexOf(result, value) < 0) {
|
|
var argsIndex = argsLength;
|
|
while (--argsIndex) {
|
|
if (indexOf(args[argsIndex], value) < 0) {
|
|
continue outer;
|
|
}
|
|
}
|
|
result.push(value);
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* Gets the last element of `array`.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Array
|
|
* @param {Array} array The array to query.
|
|
* @returns {*} Returns the last element of `array`.
|
|
* @example
|
|
*
|
|
* _.last([1, 2, 3]);
|
|
* // => 3
|
|
*/
|
|
function last(array, n, guard) {
|
|
var length = array ? array.length : 0;
|
|
if (n == null || guard) {
|
|
return array ? array[length - 1] : undefined;
|
|
}
|
|
n = length - (n || 0);
|
|
return slice(array, n < 0 ? 0 : n);
|
|
}
|
|
|
|
/**
|
|
* This method is like `_.indexOf` except that it iterates over elements of
|
|
* `array` from right to left.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Array
|
|
* @param {Array} array The array to search.
|
|
* @param {*} value The value to search for.
|
|
* @param {boolean|number} [fromIndex=array.length-1] The index to search from
|
|
* or `true` to perform a binary search on a sorted array.
|
|
* @returns {number} Returns the index of the matched value, else `-1`.
|
|
* @example
|
|
*
|
|
* _.lastIndexOf([1, 2, 3, 1, 2, 3], 2);
|
|
* // => 4
|
|
*
|
|
* // using `fromIndex`
|
|
* _.lastIndexOf([1, 2, 3, 1, 2, 3], 2, 3);
|
|
* // => 1
|
|
*
|
|
* // performing a binary search
|
|
* _.lastIndexOf([4, 4, 5, 5, 6, 6], 5, true);
|
|
* // => 3
|
|
*/
|
|
function lastIndexOf(array, value, fromIndex) {
|
|
var length = array ? array.length : 0;
|
|
if (!length) {
|
|
return -1;
|
|
}
|
|
var index = length;
|
|
if (typeof fromIndex == 'number') {
|
|
index = (fromIndex < 0 ? nativeMax(length + fromIndex, 0) : nativeMin(fromIndex || 0, length - 1)) + 1;
|
|
}
|
|
if (value !== value) {
|
|
return indexOfNaN(array, index, true);
|
|
}
|
|
while (index--) {
|
|
if (array[index] === value) {
|
|
return index;
|
|
}
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
/**
|
|
* Gets all but the first element of `array`.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @alias tail
|
|
* @category Array
|
|
* @param {Array} array The array to query.
|
|
* @returns {Array} Returns the slice of `array`.
|
|
* @example
|
|
*
|
|
* _.rest([1, 2, 3]);
|
|
* // => [2, 3]
|
|
*/
|
|
function rest(array, n, guard) {
|
|
if (n == null || guard) {
|
|
n = 1;
|
|
} else {
|
|
n = n < 0 ? 0 : n;
|
|
}
|
|
return slice(array, n);
|
|
}
|
|
|
|
/**
|
|
* Slices `array` from the `start` index up to, but not including, the `end` index.
|
|
*
|
|
* **Note:** This function is used instead of `Array#slice` to support node lists
|
|
* in IE < 9 and to ensure dense arrays are returned.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Array
|
|
* @param {Array} array The array to slice.
|
|
* @param {number} [start=0] The start index.
|
|
* @param {number} [end=array.length] The end index.
|
|
* @returns {Array} Returns the slice of `array`.
|
|
*/
|
|
function slice(array, start, end) {
|
|
var index = -1,
|
|
length = array ? array.length : 0,
|
|
endType = typeof end;
|
|
|
|
if (end && endType != 'number' && isIterateeCall(array, start, end)) {
|
|
start = 0;
|
|
end = length;
|
|
}
|
|
start = start == null ? 0 : (+start || 0);
|
|
if (start < 0) {
|
|
start = -start > length ? 0 : (length + start);
|
|
}
|
|
end = (endType == 'undefined' || end > length) ? length : (+end || 0);
|
|
if (end < 0) {
|
|
end += length;
|
|
}
|
|
if (end && end == length && !start) {
|
|
return baseSlice(array);
|
|
}
|
|
length = start > end ? 0 : (end - start);
|
|
|
|
var result = Array(length);
|
|
while (++index < length) {
|
|
result[index] = array[index + start];
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* Uses a binary search to determine the lowest index at which a value should
|
|
* be inserted into a given sorted array in order to maintain the sort order
|
|
* of the array. If an iteratee function is provided it is invoked for `value`
|
|
* and each element of `array` to compute their sort ranking. The iteratee
|
|
* is bound to `thisArg` and invoked with one argument; (value).
|
|
*
|
|
* If a property name is provided for `iteratee` the created "_.pluck" style
|
|
* callback returns the property value of the given element.
|
|
*
|
|
* If an object is provided for `iteratee` the created "_.where" style callback
|
|
* returns `true` for elements that have the properties of the given object,
|
|
* else `false`.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Array
|
|
* @param {Array} array The array to inspect.
|
|
* @param {*} value The value to evaluate.
|
|
* @param {Function|Object|string} [iteratee=identity] The function invoked
|
|
* per iteration. If a property name or object is provided it is used to
|
|
* create a "_.pluck" or "_.where" style callback respectively.
|
|
* @param {*} [thisArg] The `this` binding of `iteratee`.
|
|
* @returns {number} Returns the index at which `value` should be inserted
|
|
* into `array`.
|
|
* @example
|
|
*
|
|
* _.sortedIndex([30, 50], 40);
|
|
* // => 1
|
|
*
|
|
* _.sortedIndex([4, 4, 5, 5, 6, 6], 5);
|
|
* // => 2
|
|
*
|
|
* var dict = { 'data': { 'thirty': 30, 'forty': 40, 'fifty': 50 } };
|
|
*
|
|
* // using an iteratee function
|
|
* _.sortedIndex(['thirty', 'fifty'], 'forty', function(word) {
|
|
* return this.data[word];
|
|
* }, dict);
|
|
* // => 1
|
|
*
|
|
* // using "_.pluck" callback shorthand
|
|
* _.sortedIndex([{ 'x': 30 }, { 'x': 50 }], { 'x': 40 }, 'x');
|
|
* // => 1
|
|
*/
|
|
function sortedIndex(array, value, iteratee, thisArg) {
|
|
iteratee = iteratee == null ? identity : baseCallback(iteratee, thisArg, 1);
|
|
return baseSortedIndex(array, value, iteratee);
|
|
}
|
|
|
|
/**
|
|
* Creates a slice of `array` with `n` elements taken from the beginning.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @type Function
|
|
* @category Array
|
|
* @param {Array} array The array to query.
|
|
* @param {number} [n=1] The number of elements to take.
|
|
* @param- {Object} [guard] Enables use as a callback for functions like `_.map`.
|
|
* @returns {Array} Returns the slice of `array`.
|
|
* @example
|
|
*
|
|
* _.take([1, 2, 3], 1);
|
|
* // => [1]
|
|
*
|
|
* _.take([1, 2, 3], 2);
|
|
* // => [1, 2]
|
|
*
|
|
* _.take([1, 2, 3], 5);
|
|
* // => [1, 2, 3]
|
|
*
|
|
* _.take([1, 2, 3], 0);
|
|
* // => []
|
|
*/
|
|
var take = first;
|
|
|
|
/**
|
|
* Creates an array of unique values, in order, of the provided arrays using
|
|
* `SameValueZero` for equality comparisons.
|
|
*
|
|
* **Note:** `SameValueZero` is like strict equality, e.g. `===`, except that
|
|
* `NaN` matches `NaN`. See the [ES6 spec](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-samevaluezero)
|
|
* for more details.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Array
|
|
* @param {...Array} [arrays] The arrays to inspect.
|
|
* @returns {Array} Returns the new array of combined values.
|
|
* @example
|
|
*
|
|
* _.union([1, 2, 3], [5, 2, 1, 4], [2, 1]);
|
|
* // => [1, 2, 3, 5, 4]
|
|
*/
|
|
function union() {
|
|
return baseUniq(baseFlatten(arguments, false, true));
|
|
}
|
|
|
|
/**
|
|
* Creates a duplicate-value-free version of an array using `SameValueZero`
|
|
* for equality comparisons. Providing `true` for `isSorted` performs a faster
|
|
* search algorithm for sorted arrays. If an iteratee function is provided it
|
|
* is invoked for each value in the array to generate the criterion by which
|
|
* uniqueness is computed. The `iteratee` is bound to `thisArg` and invoked
|
|
* with three arguments; (value, index, array).
|
|
*
|
|
* If a property name is provided for `iteratee` the created "_.pluck" style
|
|
* callback returns the property value of the given element.
|
|
*
|
|
* If an object is provided for `iteratee` the created "_.where" style callback
|
|
* returns `true` for elements that have the properties of the given object,
|
|
* else `false`.
|
|
*
|
|
* **Note:** `SameValueZero` is like strict equality, e.g. `===`, except that
|
|
* `NaN` matches `NaN`. See the [ES6 spec](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-samevaluezero)
|
|
* for more details.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @alias unique
|
|
* @category Array
|
|
* @param {Array} array The array to inspect.
|
|
* @param {boolean} [isSorted=false] Specify the array is sorted.
|
|
* @param {Function|Object|string} [iteratee] The function invoked per iteration.
|
|
* If a property name or object is provided it is used to create a "_.pluck"
|
|
* or "_.where" style callback respectively.
|
|
* @param {*} [thisArg] The `this` binding of `iteratee`.
|
|
* @returns {Array} Returns the new duplicate-value-free array.
|
|
* @example
|
|
*
|
|
* _.uniq([1, 2, 1]);
|
|
* // => [1, 2]
|
|
*
|
|
* // using `isSorted`
|
|
* _.uniq([1, 1, 2], true);
|
|
* // => [1, 2]
|
|
*
|
|
* // using an iteratee function
|
|
* _.uniq([1, 2.5, 1.5, 2], function(n) { return this.floor(n); }, Math);
|
|
* // => [1, 2.5]
|
|
*
|
|
* // using "_.pluck" callback shorthand
|
|
* _.uniq([{ 'x': 1 }, { 'x': 2 }, { 'x': 1 }], 'x');
|
|
* // => [{ 'x': 1 }, { 'x': 2 }]
|
|
*/
|
|
function uniq(array, isSorted, iteratee, thisArg) {
|
|
var length = array ? array.length : 0;
|
|
if (!length) {
|
|
return [];
|
|
}
|
|
// juggle arguments
|
|
if (typeof isSorted != 'boolean' && isSorted != null) {
|
|
thisArg = iteratee;
|
|
iteratee = isIterateeCall(array, isSorted, thisArg) ? null : isSorted;
|
|
isSorted = false;
|
|
}
|
|
if (iteratee != null) {
|
|
iteratee = baseCallback(iteratee, thisArg, 3);
|
|
}
|
|
return (isSorted && getIndexOf() == baseIndexOf)
|
|
? sortedUniq(array, iteratee)
|
|
: baseUniq(array, iteratee);
|
|
}
|
|
|
|
/**
|
|
* This method is like `_.zip` except that it accepts an array of grouped
|
|
* elements and creates an array regrouping the elements to their pre `_.zip`
|
|
* configuration.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Array
|
|
* @param {Array} array The array of grouped elements to process.
|
|
* @returns {Array} Returns the new array of regrouped elements.
|
|
* @example
|
|
*
|
|
* var zipped = _.zip(['fred', 'barney'], [30, 40], [true, false]);
|
|
* // => [['fred', 30, true], ['barney', 40, false]]
|
|
*
|
|
* _.unzip(zipped);
|
|
* // => [['fred', 'barney'], [30, 40], [true, false]]
|
|
*/
|
|
function unzip(array) {
|
|
var index = -1,
|
|
length = isObject(length = max(array, 'length')) && length.length || 0,
|
|
result = Array(length);
|
|
|
|
while (++index < length) {
|
|
result[index] = pluck(array, index);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* Creates an array excluding all provided values using `SameValueZero` for
|
|
* equality comparisons.
|
|
*
|
|
* **Note:** `SameValueZero` is like strict equality, e.g. `===`, except that
|
|
* `NaN` matches `NaN`. See the [ES6 spec](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-samevaluezero)
|
|
* for more details.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Array
|
|
* @param {Array} array The array to filter.
|
|
* @param {...*} [values] The values to exclude.
|
|
* @returns {Array} Returns the new array of filtered values.
|
|
* @example
|
|
*
|
|
* _.without([1, 2, 1, 0, 3, 1, 4], 0, 1);
|
|
* // => [2, 3, 4]
|
|
*/
|
|
function without(array) {
|
|
return baseDifference(array, slice(arguments, 1));
|
|
}
|
|
|
|
/**
|
|
* Creates an array of grouped elements, the first of which contains the first
|
|
* elements of the given arrays, the second of which contains the second elements
|
|
* of the given arrays, and so on.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Array
|
|
* @param {...Array} [arrays] The arrays to process.
|
|
* @returns {Array} Returns the new array of grouped elements.
|
|
* @example
|
|
*
|
|
* _.zip(['fred', 'barney'], [30, 40], [true, false]);
|
|
* // => [['fred', 30, true], ['barney', 40, false]]
|
|
*/
|
|
function zip() {
|
|
var length = arguments.length,
|
|
array = Array(length);
|
|
|
|
while (length--) {
|
|
array[length] = arguments[length];
|
|
}
|
|
return unzip(array);
|
|
}
|
|
|
|
/**
|
|
* Creates an object composed from arrays of property names and values. Provide
|
|
* either a single two dimensional array, e.g. `[[key1, value1], [key2, value2]]`
|
|
* or two arrays, one of property names and one of corresponding values.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @alias object
|
|
* @category Array
|
|
* @param {Array} props The property names.
|
|
* @param {Array} [vals=[]] The property values.
|
|
* @returns {Object} Returns the new object.
|
|
* @example
|
|
*
|
|
* _.zipObject(['fred', 'barney'], [30, 40]);
|
|
* // => { 'fred': 30, 'barney': 40 }
|
|
*/
|
|
function zipObject(props, vals) {
|
|
var index = -1,
|
|
length = props ? props.length : 0,
|
|
result = {};
|
|
|
|
if (!vals && length && !isArray(props[0])) {
|
|
vals = [];
|
|
}
|
|
while (++index < length) {
|
|
var key = props[index];
|
|
if (vals) {
|
|
result[key] = vals[index];
|
|
} else if (key) {
|
|
result[key[0]] = key[1];
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/*------------------------------------------------------------------------*/
|
|
|
|
/**
|
|
* Creates a `lodash` object that wraps `value` with explicit method
|
|
* chaining enabled.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Chain
|
|
* @param {*} value The value to wrap.
|
|
* @returns {Object} Returns the new wrapper object.
|
|
* @example
|
|
*
|
|
* var users = [
|
|
* { 'user': 'barney', 'age': 36 },
|
|
* { 'user': 'fred', 'age': 40 },
|
|
* { 'user': 'pebbles', 'age': 1 }
|
|
* ];
|
|
*
|
|
* var youngest = _.chain(users)
|
|
* .sortBy('age')
|
|
* .map(function(chr) { return chr.user + ' is ' + chr.age; })
|
|
* .first()
|
|
* .value();
|
|
* // => 'pebbles is 1'
|
|
*/
|
|
function chain(value) {
|
|
var result = lodash(value);
|
|
result.__chain__ = true;
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* This method invokes `interceptor` and returns `value`. The interceptor is
|
|
* bound to `thisArg` and invoked with one argument; (value). The purpose of
|
|
* this method is to "tap into" a method chain in order to perform operations
|
|
* on intermediate results within the chain.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Chain
|
|
* @param {*} value The value to provide to `interceptor`.
|
|
* @param {Function} interceptor The function to invoke.
|
|
* @param {*} [thisArg] The `this` binding of `interceptor`.
|
|
* @returns {*} Returns `value`.
|
|
* @example
|
|
*
|
|
* _([1, 2, 3])
|
|
* .tap(function(array) { array.pop(); })
|
|
* .reverse()
|
|
* .value();
|
|
* // => [2, 1]
|
|
*/
|
|
function tap(value, interceptor) {
|
|
interceptor(value);
|
|
return value;
|
|
}
|
|
|
|
/**
|
|
* Enables explicit method chaining on the wrapper object.
|
|
*
|
|
* @name chain
|
|
* @memberOf _
|
|
* @category Chain
|
|
* @returns {*} Returns the wrapper object.
|
|
* @example
|
|
*
|
|
* var users = [
|
|
* { 'user': 'barney', 'age': 36 },
|
|
* { 'user': 'fred', 'age': 40 }
|
|
* ];
|
|
*
|
|
* // without explicit chaining
|
|
* _(users).first();
|
|
* // => { 'user': 'barney', 'age': 36 }
|
|
*
|
|
* // with explicit chaining
|
|
* _(users).chain()
|
|
* .first()
|
|
* .pick('age')
|
|
* .value();
|
|
* // => { 'age': 36 }
|
|
*/
|
|
function wrapperChain() {
|
|
return chain(this);
|
|
}
|
|
|
|
/**
|
|
* Extracts the unwrapped value from its wrapper.
|
|
*
|
|
* @name valueOf
|
|
* @memberOf _
|
|
* @alias toJSON, value
|
|
* @category Chain
|
|
* @returns {*} Returns the unwrapped value.
|
|
* @example
|
|
*
|
|
* _([1, 2, 3]).valueOf();
|
|
* // => [1, 2, 3]
|
|
*/
|
|
function wrapperValueOf() {
|
|
return this.__wrapped__;
|
|
}
|
|
|
|
/*------------------------------------------------------------------------*/
|
|
|
|
/**
|
|
* Checks if `value` is present in `collection` using `SameValueZero` for
|
|
* equality comparisons. If `fromIndex` is negative, it is used as the offset
|
|
* from the end of the collection.
|
|
*
|
|
* **Note:** `SameValueZero` is like strict equality, e.g. `===`, except that
|
|
* `NaN` matches `NaN`. See the [ES6 spec](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-samevaluezero)
|
|
* for more details.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @alias include
|
|
* @category Collection
|
|
* @param {Array|Object|string} collection The collection to search.
|
|
* @param {*} target The value to check for.
|
|
* @param {number} [fromIndex=0] The index to search from.
|
|
* @returns {boolean} Returns `true` if a matching element is found, else `false`.
|
|
* @example
|
|
*
|
|
* _.contains([1, 2, 3], 1);
|
|
* // => true
|
|
*
|
|
* _.contains([1, 2, 3], 1, 2);
|
|
* // => false
|
|
*
|
|
* _.contains({ 'user': 'fred', 'age': 40 }, 'fred');
|
|
* // => true
|
|
*
|
|
* _.contains('pebbles', 'eb');
|
|
* // => true
|
|
*/
|
|
function contains(collection, target) {
|
|
var length = collection ? collection.length : 0;
|
|
|
|
if (!(typeof length == 'number' && length > -1 && length <= MAX_SAFE_INTEGER)) {
|
|
collection = values(collection);
|
|
length = collection.length;
|
|
}
|
|
return length ? (getIndexOf(collection, target) > -1) : false;
|
|
}
|
|
|
|
/**
|
|
* Creates an object composed of keys generated from the results of running
|
|
* each element of `collection` through `iteratee`. The corresponding value
|
|
* of each key is the number of times the key was returned by `iteratee`.
|
|
* The `iteratee` is bound to `thisArg` and invoked with three arguments;
|
|
* (value, index|key, collection).
|
|
*
|
|
* If a property name is provided for `iteratee` the created "_.pluck" style
|
|
* callback returns the property value of the given element.
|
|
*
|
|
* If an object is provided for `iteratee` the created "_.where" style callback
|
|
* returns `true` for elements that have the properties of the given object,
|
|
* else `false`.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Collection
|
|
* @param {Array|Object|string} collection The collection to iterate over.
|
|
* @param {Function|Object|string} [iteratee=identity] The function invoked
|
|
* per iteration. If a property name or object is provided it is used to
|
|
* create a "_.pluck" or "_.where" style callback respectively.
|
|
* @param {*} [thisArg] The `this` binding of `iteratee`.
|
|
* @returns {Object} Returns the composed aggregate object.
|
|
* @example
|
|
*
|
|
* _.countBy([4.3, 6.1, 6.4], function(n) { return Math.floor(n); });
|
|
* // => { '4': 1, '6': 2 }
|
|
*
|
|
* _.countBy([4.3, 6.1, 6.4], function(n) { return this.floor(n); }, Math);
|
|
* // => { '4': 1, '6': 2 }
|
|
*
|
|
* _.countBy(['one', 'two', 'three'], 'length');
|
|
* // => { '3': 2, '5': 1 }
|
|
*/
|
|
var countBy = createAggregator(function(result, value, key) {
|
|
hasOwnProperty.call(result, key) ? ++result[key] : (result[key] = 1);
|
|
});
|
|
|
|
/**
|
|
* Checks if `predicate` returns truthy for **all** elements of `collection`.
|
|
* The predicate is bound to `thisArg` and invoked with three arguments;
|
|
* (value, index|key, collection).
|
|
*
|
|
* If a property name is provided for `predicate` the created "_.pluck" style
|
|
* callback returns the property value of the given element.
|
|
*
|
|
* If an object is provided for `predicate` the created "_.where" style callback
|
|
* returns `true` for elements that have the properties of the given object,
|
|
* else `false`.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @alias all
|
|
* @category Collection
|
|
* @param {Array|Object|string} collection The collection to iterate over.
|
|
* @param {Function|Object|string} [predicate=identity] The function invoked
|
|
* per iteration. If a property name or object is provided it is used to
|
|
* create a "_.pluck" or "_.where" style callback respectively.
|
|
* @param {*} [thisArg] The `this` binding of `predicate`.
|
|
* @returns {boolean} Returns `true` if all elements pass the predicate check,
|
|
* else `false`.
|
|
* @example
|
|
*
|
|
* _.every([true, 1, null, 'yes']);
|
|
* // => false
|
|
*
|
|
* var users = [
|
|
* { 'user': 'barney', 'age': 36 },
|
|
* { 'user': 'fred', 'age': 40 }
|
|
* ];
|
|
*
|
|
* // using "_.pluck" callback shorthand
|
|
* _.every(users, 'age');
|
|
* // => true
|
|
*
|
|
* // using "_.where" callback shorthand
|
|
* _.every(users, { 'age': 36 });
|
|
* // => false
|
|
*/
|
|
function every(collection, predicate, thisArg) {
|
|
var func = isArray(collection) ? arrayEvery : baseEvery;
|
|
if (typeof predicate != 'function' || typeof thisArg != 'undefined') {
|
|
predicate = baseCallback(predicate, thisArg, 3);
|
|
}
|
|
return func(collection, predicate);
|
|
}
|
|
|
|
/**
|
|
* Iterates over elements of `collection`, returning an array of all elements
|
|
* `predicate` returns truthy for. The predicate is bound to `thisArg` and
|
|
* invoked with three arguments; (value, index|key, collection).
|
|
*
|
|
* If a property name is provided for `predicate` the created "_.pluck" style
|
|
* callback returns the property value of the given element.
|
|
*
|
|
* If an object is provided for `predicate` the created "_.where" style callback
|
|
* returns `true` for elements that have the properties of the given object,
|
|
* else `false`.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @alias select
|
|
* @category Collection
|
|
* @param {Array|Object|string} collection The collection to iterate over.
|
|
* @param {Function|Object|string} [predicate=identity] The function invoked
|
|
* per iteration. If a property name or object is provided it is used to
|
|
* create a "_.pluck" or "_.where" style callback respectively.
|
|
* @param {*} [thisArg] The `this` binding of `predicate`.
|
|
* @returns {Array} Returns the new filtered array.
|
|
* @example
|
|
*
|
|
* var evens = _.filter([1, 2, 3, 4], function(n) { return n % 2 == 0; });
|
|
* // => [2, 4]
|
|
*
|
|
* var users = [
|
|
* { 'user': 'barney', 'age': 36 },
|
|
* { 'user': 'fred', 'age': 40, 'blocked': true }
|
|
* ];
|
|
*
|
|
* // using "_.pluck" callback shorthand
|
|
* _.filter(users, 'blocked');
|
|
* // => [{ 'user': 'fred', 'age': 40, 'blocked': true }]
|
|
*
|
|
* // using "_.where" callback shorthand
|
|
* _.filter(users, { 'age': 36 });
|
|
* // => [{ 'user': 'barney', 'age': 36 }]
|
|
*/
|
|
function filter(collection, predicate, thisArg) {
|
|
var func = isArray(collection) ? arrayFilter : baseFilter;
|
|
|
|
predicate = baseCallback(predicate, thisArg, 3);
|
|
return func(collection, predicate);
|
|
}
|
|
|
|
/**
|
|
* Iterates over elements of `collection`, returning the first element
|
|
* `predicate` returns truthy for. The predicate is bound to `thisArg` and
|
|
* invoked with three arguments; (value, index|key, collection).
|
|
*
|
|
* If a property name is provided for `predicate` the created "_.pluck" style
|
|
* callback returns the property value of the given element.
|
|
*
|
|
* If an object is provided for `predicate` the created "_.where" style callback
|
|
* returns `true` for elements that have the properties of the given object,
|
|
* else `false`.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @alias detect
|
|
* @category Collection
|
|
* @param {Array|Object|string} collection The collection to search.
|
|
* @param {Function|Object|string} [predicate=identity] The function invoked
|
|
* per iteration. If a property name or object is provided it is used to
|
|
* create a "_.pluck" or "_.where" style callback respectively.
|
|
* @param {*} [thisArg] The `this` binding of `predicate`.
|
|
* @returns {*} Returns the matched element, else `undefined`.
|
|
* @example
|
|
*
|
|
* var users = [
|
|
* { 'user': 'barney', 'age': 36 },
|
|
* { 'user': 'fred', 'age': 40, 'blocked': true },
|
|
* { 'user': 'pebbles', 'age': 1 }
|
|
* ];
|
|
*
|
|
* _.find(users, function(chr) {
|
|
* return chr.age < 40;
|
|
* });
|
|
* // => { 'user': 'barney', 'age': 36 }
|
|
*
|
|
* // using "_.where" callback shorthand
|
|
* _.find(users, { 'age': 1 });
|
|
* // => { 'user': 'pebbles', 'age': 1 }
|
|
*
|
|
* // using "_.pluck" callback shorthand
|
|
* _.find(users, 'blocked');
|
|
* // => { 'user': 'fred', 'age': 40, 'blocked': true }
|
|
*/
|
|
function find(collection, predicate, thisArg) {
|
|
if (isArray(collection)) {
|
|
var index = findIndex(collection, predicate, thisArg);
|
|
return index > -1 ? collection[index] : undefined;
|
|
}
|
|
predicate = baseCallback(predicate, thisArg, 3);
|
|
return baseFind(collection, predicate, baseEach);
|
|
}
|
|
|
|
/**
|
|
* Performs a deep comparison between each element in `collection` and the
|
|
* source object, returning the first element that has equivalent property
|
|
* values.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Collection
|
|
* @param {Array|Object|string} collection The collection to search.
|
|
* @param {Object} source The object of property values to match.
|
|
* @returns {*} Returns the matched element, else `undefined`.
|
|
* @example
|
|
*
|
|
* var users = [
|
|
* { 'user': 'barney', 'age': 36, 'employer': 'slate' },
|
|
* { 'user': 'fred', 'age': 40, 'employer': 'slate' }
|
|
* ];
|
|
*
|
|
* _.findWhere(users, { 'employer': 'slate' });
|
|
* // => { 'user': 'barney', 'age': 36, 'employer': 'slate' }
|
|
*
|
|
* _.findWhere(users, { 'age': 40 });
|
|
* // => { 'user': 'fred', 'age': 40, 'employer': 'slate' }
|
|
*/
|
|
function findWhere(collection, source) {
|
|
return find(collection, matches(source));
|
|
}
|
|
|
|
/**
|
|
* Iterates over elements of `collection` invoking `iteratee` for each element.
|
|
* The `iteratee` is bound to `thisArg` and invoked with three arguments;
|
|
* (value, index|key, collection). Iterator functions may exit iteration early
|
|
* by explicitly returning `false`.
|
|
*
|
|
* **Note:** As with other "Collections" methods, objects with a `length` property
|
|
* are iterated like arrays. To avoid this behavior `_.forIn` or `_.forOwn`
|
|
* may be used for object iteration.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @alias each
|
|
* @category Collection
|
|
* @param {Array|Object|string} collection The collection to iterate over.
|
|
* @param {Function} [iteratee=identity] The function invoked per iteration.
|
|
* @param {*} [thisArg] The `this` binding of `iteratee`.
|
|
* @returns {Array|Object|string} Returns `collection`.
|
|
* @example
|
|
*
|
|
* _([1, 2, 3]).forEach(function(n) { console.log(n); });
|
|
* // => logs each value from left to right and returns the array
|
|
*
|
|
* _.forEach({ 'one': 1, 'two': 2, 'three': 3 }, function(n, key) { console.log(n, key); });
|
|
* // => logs each value-key pair and returns the object (iteration order is not guaranteed)
|
|
*/
|
|
function forEach(collection, iteratee, thisArg) {
|
|
return (typeof iteratee == 'function' && typeof thisArg == 'undefined' && isArray(collection))
|
|
? arrayEach(collection, iteratee)
|
|
: baseEach(collection, baseCallback(iteratee, thisArg, 3));
|
|
}
|
|
|
|
/**
|
|
* Creates an object composed of keys generated from the results of running
|
|
* each element of `collection` through `iteratee`. The corresponding
|
|
* value of each key is an array of the elements responsible for generating
|
|
* the key. The `iteratee` is bound to `thisArg` and invoked with three
|
|
* arguments; (value, index|key, collection).
|
|
*
|
|
* If a property name is provided for `iteratee` the created "_.pluck" style
|
|
* callback returns the property value of the given element.
|
|
*
|
|
* If an object is provided for `iteratee` the created "_.where" style callback
|
|
* returns `true` for elements that have the properties of the given object,
|
|
* else `false`.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Collection
|
|
* @param {Array|Object|string} collection The collection to iterate over.
|
|
* @param {Function|Object|string} [iteratee=identity] The function invoked
|
|
* per iteration. If a property name or object is provided it is used to
|
|
* create a "_.pluck" or "_.where" style callback respectively.
|
|
* @param {*} [thisArg] The `this` binding of `iteratee`.
|
|
* @returns {Object} Returns the composed aggregate object.
|
|
* @example
|
|
*
|
|
* _.groupBy([4.2, 6.1, 6.4], function(n) { return Math.floor(n); });
|
|
* // => { '4': [4.2], '6': [6.1, 6.4] }
|
|
*
|
|
* _.groupBy([4.2, 6.1, 6.4], function(n) { return this.floor(n); }, Math);
|
|
* // => { '4': [4.2], '6': [6.1, 6.4] }
|
|
*
|
|
* // using "_.pluck" callback shorthand
|
|
* _.groupBy(['one', 'two', 'three'], 'length');
|
|
* // => { '3': ['one', 'two'], '5': ['three'] }
|
|
*/
|
|
var groupBy = createAggregator(function(result, value, key) {
|
|
if (hasOwnProperty.call(result, key)) {
|
|
result[key].push(value);
|
|
} else {
|
|
result[key] = [value];
|
|
}
|
|
});
|
|
|
|
/**
|
|
* Creates an object composed of keys generated from the results of running
|
|
* each element of the collection through `iteratee`. The corresponding value
|
|
* of each key is the last element responsible for generating the key. The
|
|
* iteratee function is bound to `thisArg` and invoked with three arguments;
|
|
* (value, index|key, collection).
|
|
*
|
|
* If a property name is provided for `iteratee` the created "_.pluck" style
|
|
* callback returns the property value of the given element.
|
|
*
|
|
* If an object is provided for `iteratee` the created "_.where" style callback
|
|
* returns `true` for elements that have the properties of the given object,
|
|
* else `false`.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Collection
|
|
* @param {Array|Object|string} collection The collection to iterate over.
|
|
* @param {Function|Object|string} [iteratee=identity] The function invoked
|
|
* per iteration. If a property name or object is provided it is used to
|
|
* create a "_.pluck" or "_.where" style callback respectively.
|
|
* @param {*} [thisArg] The `this` binding of `iteratee`.
|
|
* @returns {Object} Returns the composed aggregate object.
|
|
* @example
|
|
*
|
|
* var keyData = [
|
|
* { 'dir': 'left', 'code': 97 },
|
|
* { 'dir': 'right', 'code': 100 }
|
|
* ];
|
|
*
|
|
* _.indexBy(keyData, 'dir');
|
|
* // => { 'left': { 'dir': 'left', 'code': 97 }, 'right': { 'dir': 'right', 'code': 100 } }
|
|
*
|
|
* _.indexBy(keyData, function(object) { return String.fromCharCode(object.code); });
|
|
* // => { 'a': { 'dir': 'left', 'code': 97 }, 'd': { 'dir': 'right', 'code': 100 } }
|
|
*
|
|
* _.indexBy(keyData, function(object) { return this.fromCharCode(object.code); }, String);
|
|
* // => { 'a': { 'dir': 'left', 'code': 97 }, 'd': { 'dir': 'right', 'code': 100 } }
|
|
*/
|
|
var indexBy = createAggregator(function(result, value, key) {
|
|
result[key] = value;
|
|
});
|
|
|
|
/**
|
|
* Invokes the method named by `methodName` on each element in the collection,
|
|
* returning an array of the results of each invoked method. Any additional
|
|
* arguments are provided to each invoked method. If `methodName` is a function
|
|
* it is invoked for, and `this` bound to, each element in the collection.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Collection
|
|
* @param {Array|Object|string} collection The collection to iterate over.
|
|
* @param {Function|string} methodName The name of the method to invoke or
|
|
* the function invoked per iteration.
|
|
* @param {...*} [args] The arguments to invoke the method with.
|
|
* @returns {Array} Returns the array of results.
|
|
* @example
|
|
*
|
|
* _.invoke([[5, 1, 7], [3, 2, 1]], 'sort');
|
|
* // => [[1, 5, 7], [1, 2, 3]]
|
|
*
|
|
* _.invoke([123, 456], String.prototype.split, '');
|
|
* // => [['1', '2', '3'], ['4', '5', '6']]
|
|
*/
|
|
function invoke(collection, methodName) {
|
|
return baseInvoke(collection, methodName, slice(arguments, 2));
|
|
}
|
|
|
|
/**
|
|
* Creates an array of values by running each element in the collection through
|
|
* `iteratee`. The `iteratee` is bound to `thisArg` and invoked with three
|
|
* arguments; (value, index|key, collection).
|
|
*
|
|
* If a property name is provided for `iteratee` the created "_.pluck" style
|
|
* callback returns the property value of the given element.
|
|
*
|
|
* If an object is provided for `iteratee` the created "_.where" style callback
|
|
* returns `true` for elements that have the properties of the given object,
|
|
* else `false`.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @alias collect
|
|
* @category Collection
|
|
* @param {Array|Object|string} collection The collection to iterate over.
|
|
* @param {Function|Object|string} [iteratee=identity] The function invoked
|
|
* per iteration. If a property name or object is provided it is used to
|
|
* create a "_.pluck" or "_.where" style callback respectively.
|
|
* @param {*} [thisArg] The `this` binding of `iteratee`.
|
|
* @returns {Array} Returns the new mapped array.
|
|
* @example
|
|
*
|
|
* _.map([1, 2, 3], function(n) { return n * 3; });
|
|
* // => [3, 6, 9]
|
|
*
|
|
* _.map({ 'one': 1, 'two': 2, 'three': 3 }, function(n) { return n * 3; });
|
|
* // => [3, 6, 9] (iteration order is not guaranteed)
|
|
*
|
|
* var users = [
|
|
* { 'user': 'barney', 'age': 36 },
|
|
* { 'user': 'fred', 'age': 40 }
|
|
* ];
|
|
*
|
|
* // using "_.pluck" callback shorthand
|
|
* _.map(users, 'user');
|
|
* // => ['barney', 'fred']
|
|
*/
|
|
function map(collection, iteratee, thisArg) {
|
|
iteratee = baseCallback(iteratee, thisArg, 3);
|
|
|
|
var func = isArray(collection) ? arrayMap : baseMap;
|
|
return func(collection, iteratee);
|
|
}
|
|
|
|
/**
|
|
* Retrieves the maximum value of `collection`. If the collection is empty
|
|
* or falsey `-Infinity` is returned. If an iteratee function is provided it
|
|
* is invoked for each value in the collection to generate the criterion by
|
|
* which the value is ranked. The `iteratee` is bound to `thisArg` and invoked
|
|
* with three arguments; (value, index, collection).
|
|
*
|
|
* If a property name is provided for `iteratee` the created "_.pluck" style
|
|
* callback returns the property value of the given element.
|
|
*
|
|
* If an object is provided for `iteratee` the created "_.where" style callback
|
|
* returns `true` for elements that have the properties of the given object,
|
|
* else `false`.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Collection
|
|
* @param {Array|Object|string} collection The collection to iterate over.
|
|
* @param {Function|Object|string} [iteratee] The function invoked per iteration.
|
|
* If a property name or object is provided it is used to create a "_.pluck"
|
|
* or "_.where" style callback respectively.
|
|
* @param {*} [thisArg] The `this` binding of `iteratee`.
|
|
* @returns {*} Returns the maximum value.
|
|
* @example
|
|
*
|
|
* _.max([4, 2, 8, 6]);
|
|
* // => 8
|
|
*
|
|
* _.max([]);
|
|
* // => -Infinity
|
|
*
|
|
* var users = [
|
|
* { 'user': 'barney', 'age': 36 },
|
|
* { 'user': 'fred', 'age': 40 }
|
|
* ];
|
|
*
|
|
* _.max(users, function(chr) { return chr.age; });
|
|
* // => { 'user': 'fred', 'age': 40 };
|
|
*
|
|
* // using "_.pluck" callback shorthand
|
|
* _.max(users, 'age');
|
|
* // => { 'user': 'fred', 'age': 40 };
|
|
*/
|
|
function max(collection, iteratee, thisArg) {
|
|
iteratee = isIterateeCall(collection, iteratee, thisArg) ? null : iteratee;
|
|
|
|
var computed = -Infinity,
|
|
result = computed;
|
|
|
|
if (iteratee == null) {
|
|
var index = -1,
|
|
iterable = toIterable(collection),
|
|
length = iterable.length;
|
|
|
|
while (++index < length) {
|
|
var value = iterable[index];
|
|
if (value > result) {
|
|
result = value;
|
|
}
|
|
}
|
|
} else {
|
|
iteratee = baseCallback(iteratee, thisArg, 3);
|
|
|
|
baseEach(collection, function(value, index, collection) {
|
|
var current = iteratee(value, index, collection);
|
|
if (current > computed || (current === -Infinity && current === result)) {
|
|
computed = current;
|
|
result = value;
|
|
}
|
|
});
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* Retrieves the minimum value of `collection`. If the collection is empty
|
|
* or falsey `Infinity` is returned. If an iteratee function is provided it
|
|
* is invoked for each value in the collection to generate the criterion by
|
|
* which the value is ranked. The `iteratee` is bound to `thisArg` and invoked
|
|
* with three arguments; (value, index, collection).
|
|
*
|
|
* If a property name is provided for `iteratee` the created "_.pluck" style
|
|
* callback returns the property value of the given element.
|
|
*
|
|
* If an object is provided for `iteratee` the created "_.where" style callback
|
|
* returns `true` for elements that have the properties of the given object,
|
|
* else `false`.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Collection
|
|
* @param {Array|Object|string} collection The collection to iterate over.
|
|
* @param {Function|Object|string} [iteratee] The function invoked per iteration.
|
|
* If a property name or object is provided it is used to create a "_.pluck"
|
|
* or "_.where" style callback respectively.
|
|
* @param {*} [thisArg] The `this` binding of `iteratee`.
|
|
* @returns {*} Returns the minimum value.
|
|
* @example
|
|
*
|
|
* _.min([4, 2, 8, 6]);
|
|
* // => 2
|
|
*
|
|
* _.min([]);
|
|
* // => Infinity
|
|
*
|
|
* var users = [
|
|
* { 'user': 'barney', 'age': 36 },
|
|
* { 'user': 'fred', 'age': 40 }
|
|
* ];
|
|
*
|
|
* _.min(users, function(chr) { return chr.age; });
|
|
* // => { 'user': 'barney', 'age': 36 };
|
|
*
|
|
* // using "_.pluck" callback shorthand
|
|
* _.min(users, 'age');
|
|
* // => { 'user': 'barney', 'age': 36 };
|
|
*/
|
|
function min(collection, iteratee, thisArg) {
|
|
iteratee = isIterateeCall(collection, iteratee, thisArg) ? null : iteratee;
|
|
|
|
var computed = Infinity,
|
|
result = computed;
|
|
|
|
if (iteratee == null) {
|
|
var index = -1,
|
|
iterable = toIterable(collection),
|
|
length = iterable.length;
|
|
|
|
while (++index < length) {
|
|
var value = iterable[index];
|
|
if (value < result) {
|
|
result = value;
|
|
}
|
|
}
|
|
} else {
|
|
iteratee = baseCallback(iteratee, thisArg, 3);
|
|
|
|
baseEach(collection, function(value, index, collection) {
|
|
var current = iteratee(value, index, collection);
|
|
if (current < computed || (current === Infinity && current === result)) {
|
|
computed = current;
|
|
result = value;
|
|
}
|
|
});
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* Creates an array of elements split into two groups, the first of which
|
|
* contains elements `predicate` returns truthy for, while the second of which
|
|
* contains elements `predicate` returns falsey for. The predicate is bound
|
|
* to `thisArg` and invoked with three arguments; (value, index|key, collection).
|
|
*
|
|
* If a property name is provided for `predicate` the created "_.pluck" style
|
|
* callback returns the property value of the given element.
|
|
*
|
|
* If an object is provided for `predicate` the created "_.where" style callback
|
|
* returns `true` for elements that have the properties of the given object,
|
|
* else `false`.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Collection
|
|
* @param {Array|Object|string} collection The collection to iterate over.
|
|
* @param {Function|Object|string} [predicate=identity] The function invoked
|
|
* per iteration. If a property name or object is provided it is used to
|
|
* create a "_.pluck" or "_.where" style callback respectively.
|
|
* @param {*} [thisArg] The `this` binding of `predicate`.
|
|
* @returns {Array} Returns the array of grouped elements.
|
|
* @example
|
|
*
|
|
* _.partition([1, 2, 3], function(n) { return n % 2; });
|
|
* // => [[1, 3], [2]]
|
|
*
|
|
* _.partition([1.2, 2.3, 3.4], function(n) { return this.floor(n) % 2; }, Math);
|
|
* // => [[1, 3], [2]]
|
|
*
|
|
* var users = [
|
|
* { 'user': 'barney', 'age': 36 },
|
|
* { 'user': 'fred', 'age': 40, 'blocked': true },
|
|
* { 'user': 'pebbles', 'age': 1 }
|
|
* ];
|
|
*
|
|
* // using "_.where" callback shorthand
|
|
* _.map(_.partition(users, { 'age': 1 }), function(array) { return _.pluck(array, 'user'); });
|
|
* // => [['pebbles'], ['barney', 'fred']]
|
|
*
|
|
* // using "_.pluck" callback shorthand
|
|
* _.map(_.partition(users, 'blocked'), function(array) { return _.pluck(array, 'user'); });
|
|
* // => [['fred'], ['barney', 'pebbles']]
|
|
*/
|
|
var partition = createAggregator(function(result, value, key) {
|
|
result[key ? 0 : 1].push(value);
|
|
}, function() { return [[], []]; });
|
|
|
|
/**
|
|
* Retrieves the value of a specified property from all elements in the collection.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Collection
|
|
* @param {Array|Object|string} collection The collection to iterate over.
|
|
* @param {string} key The name of the property to pluck.
|
|
* @returns {Array} Returns the property values.
|
|
* @example
|
|
*
|
|
* var users = [
|
|
* { 'user': 'barney', 'age': 36 },
|
|
* { 'user': 'fred', 'age': 40 }
|
|
* ];
|
|
*
|
|
* _.pluck(users, 'user');
|
|
* // => ['barney', 'fred']
|
|
*
|
|
* var userIndex = _.indexBy(users, 'user');
|
|
* _.pluck(userIndex, 'age');
|
|
* // => [36, 40] (iteration order is not guaranteed)
|
|
*/
|
|
function pluck(collection, key) {
|
|
return map(collection, property(key));
|
|
}
|
|
|
|
/**
|
|
* Reduces a collection to a value which is the accumulated result of running
|
|
* each element in the collection through `iteratee`, where each successive
|
|
* invocation is supplied the return value of the previous. If `accumulator`
|
|
* is not provided the first element of the collection is used as the initial
|
|
* value. The `iteratee` is bound to `thisArg`and invoked with four arguments;
|
|
* (accumulator, value, index|key, collection).
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @alias foldl, inject
|
|
* @category Collection
|
|
* @param {Array|Object|string} collection The collection to iterate over.
|
|
* @param {Function} [iteratee=identity] The function invoked per iteration.
|
|
* @param {*} [accumulator] The initial value.
|
|
* @param {*} [thisArg] The `this` binding of `iteratee`.
|
|
* @returns {*} Returns the accumulated value.
|
|
* @example
|
|
*
|
|
* var sum = _.reduce([1, 2, 3], function(sum, n) { return sum + n; });
|
|
* // => 6
|
|
*
|
|
* var mapped = _.reduce({ 'a': 1, 'b': 2, 'c': 3 }, function(result, n, key) {
|
|
* result[key] = n * 3;
|
|
* return result;
|
|
* }, {});
|
|
* // => { 'a': 3, 'b': 6, 'c': 9 } (iteration order is not guaranteed)
|
|
*/
|
|
function reduce(collection, iteratee, accumulator, thisArg) {
|
|
var func = isArray(collection) ? arrayReduce : baseReduce;
|
|
return func(collection, baseCallback(iteratee, thisArg, 4), accumulator, arguments.length < 3, baseEach);
|
|
}
|
|
|
|
/**
|
|
* This method is like `_.reduce` except that it iterates over elements of
|
|
* `collection` from right to left.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @alias foldr
|
|
* @category Collection
|
|
* @param {Array|Object|string} collection The collection to iterate over.
|
|
* @param {Function} [iteratee=identity] The function invoked per iteration.
|
|
* @param {*} [accumulator] The initial value.
|
|
* @param {*} [thisArg] The `this` binding of `iteratee`.
|
|
* @returns {*} Returns the accumulated value.
|
|
* @example
|
|
*
|
|
* var array = [[0, 1], [2, 3], [4, 5]];
|
|
* _.reduceRight(array, function(flattened, other) { return flattened.concat(other); }, []);
|
|
* // => [4, 5, 2, 3, 0, 1]
|
|
*/
|
|
function reduceRight(collection, iteratee, accumulator, thisArg) {
|
|
var func = isArray(collection) ? arrayReduceRight : baseReduce;
|
|
return func(collection, baseCallback(iteratee, thisArg, 4), accumulator, arguments.length < 3, baseEachRight);
|
|
}
|
|
|
|
/**
|
|
* The opposite of `_.filter`; this method returns the elements of `collection`
|
|
* that `predicate` does **not** return truthy for.
|
|
*
|
|
* If a property name is provided for `predicate` the created "_.pluck" style
|
|
* callback returns the property value of the given element.
|
|
*
|
|
* If an object is provided for `predicate` the created "_.where" style callback
|
|
* returns `true` for elements that have the properties of the given object,
|
|
* else `false`.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Collection
|
|
* @param {Array|Object|string} collection The collection to iterate over.
|
|
* @param {Function|Object|string} [predicate=identity] The function invoked
|
|
* per iteration. If a property name or object is provided it is used to
|
|
* create a "_.pluck" or "_.where" style callback respectively.
|
|
* @param {*} [thisArg] The `this` binding of `predicate`.
|
|
* @returns {Array} Returns the new filtered array.
|
|
* @example
|
|
*
|
|
* var odds = _.reject([1, 2, 3, 4], function(n) { return n % 2 == 0; });
|
|
* // => [1, 3]
|
|
*
|
|
* var users = [
|
|
* { 'user': 'barney', 'age': 36 },
|
|
* { 'user': 'fred', 'age': 40, 'blocked': true }
|
|
* ];
|
|
*
|
|
* // using "_.pluck" callback shorthand
|
|
* _.reject(users, 'blocked');
|
|
* // => [{ 'user': 'barney', 'age': 36 }]
|
|
*
|
|
* // using "_.where" callback shorthand
|
|
* _.reject(users, { 'age': 36 });
|
|
* // => [{ 'user': 'fred', 'age': 40, 'blocked': true }]
|
|
*/
|
|
function reject(collection, predicate, thisArg) {
|
|
var func = isArray(collection) ? arrayFilter : baseFilter;
|
|
|
|
predicate = baseCallback(predicate, thisArg, 3);
|
|
return func(collection, function(value, index, collection) {
|
|
return !predicate(value, index, collection);
|
|
});
|
|
}
|
|
|
|
/**
|
|
* Retrieves a random element or `n` random elements from a collection.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Collection
|
|
* @param {Array|Object|string} collection The collection to sample.
|
|
* @param {number} [n] The number of elements to sample.
|
|
* @param- {Object} [guard] Enables use as a callback for functions like `_.map`.
|
|
* @returns {*} Returns the random sample(s).
|
|
* @example
|
|
*
|
|
* _.sample([1, 2, 3, 4]);
|
|
* // => 2
|
|
*
|
|
* _.sample([1, 2, 3, 4], 2);
|
|
* // => [3, 1]
|
|
*/
|
|
function sample(collection, n, guard) {
|
|
if (guard || n == null) {
|
|
collection = toIterable(collection);
|
|
var length = collection.length;
|
|
return length > 0 ? collection[baseRandom(0, length - 1)] : undefined;
|
|
}
|
|
var result = shuffle(collection);
|
|
result.length = nativeMin(n < 0 ? 0 : (+n || 0), result.length);
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* Creates an array of shuffled values, using a version of the Fisher-Yates
|
|
* shuffle. See [Wikipedia](http://en.wikipedia.org/wiki/Fisher-Yates_shuffle)
|
|
* for more details.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Collection
|
|
* @param {Array|Object|string} collection The collection to shuffle.
|
|
* @returns {Array} Returns the new shuffled array.
|
|
* @example
|
|
*
|
|
* _.shuffle([1, 2, 3, 4]);
|
|
* // => [4, 1, 3, 2]
|
|
*/
|
|
function shuffle(collection) {
|
|
collection = toIterable(collection);
|
|
|
|
var index = -1,
|
|
length = collection.length,
|
|
result = Array(length);
|
|
|
|
while (++index < length) {
|
|
var rand = baseRandom(0, index);
|
|
if (index != rand) {
|
|
result[index] = result[rand];
|
|
}
|
|
result[rand] = collection[index];
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* Gets the size of the collection by returning `collection.length` for
|
|
* array-like values or the number of own enumerable properties for objects.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Collection
|
|
* @param {Array|Object|string} collection The collection to inspect.
|
|
* @returns {number} Returns `collection.length` or number of own enumerable properties.
|
|
* @example
|
|
*
|
|
* _.size([1, 2]);
|
|
* // => 2
|
|
*
|
|
* _.size({ 'one': 1, 'two': 2, 'three': 3 });
|
|
* // => 3
|
|
*
|
|
* _.size('pebbles');
|
|
* // => 7
|
|
*/
|
|
function size(collection) {
|
|
var length = collection ? collection.length : 0;
|
|
return (typeof length == 'number' && length > -1 && length <= MAX_SAFE_INTEGER)
|
|
? length
|
|
: keys(collection).length;
|
|
}
|
|
|
|
/**
|
|
* Checks if `predicate` returns truthy for **any** element of `collection`.
|
|
* The function returns as soon as it finds a passing value and does not iterate
|
|
* over the entire collection. The predicate is bound to `thisArg` and invoked
|
|
* with three arguments; (value, index|key, collection).
|
|
*
|
|
* If a property name is provided for `predicate` the created "_.pluck" style
|
|
* callback returns the property value of the given element.
|
|
*
|
|
* If an object is provided for `predicate` the created "_.where" style callback
|
|
* returns `true` for elements that have the properties of the given object,
|
|
* else `false`.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @alias any
|
|
* @category Collection
|
|
* @param {Array|Object|string} collection The collection to iterate over.
|
|
* @param {Function|Object|string} [predicate=identity] The function invoked
|
|
* per iteration. If a property name or object is provided it is used to
|
|
* create a "_.pluck" or "_.where" style callback respectively.
|
|
* @param {*} [thisArg] The `this` binding of `predicate`.
|
|
* @returns {boolean} Returns `true` if any element passes the predicate check,
|
|
* else `false`.
|
|
* @example
|
|
*
|
|
* _.some([null, 0, 'yes', false], Boolean);
|
|
* // => true
|
|
*
|
|
* var users = [
|
|
* { 'user': 'barney', 'age': 36 },
|
|
* { 'user': 'fred', 'age': 40, 'blocked': true }
|
|
* ];
|
|
*
|
|
* // using "_.pluck" callback shorthand
|
|
* _.some(users, 'blocked');
|
|
* // => true
|
|
*
|
|
* // using "_.where" callback shorthand
|
|
* _.some(users, { 'age': 1 });
|
|
* // => false
|
|
*/
|
|
function some(collection, predicate, thisArg) {
|
|
var func = isArray(collection) ? arraySome : baseSome;
|
|
if (typeof predicate != 'function' || typeof thisArg != 'undefined') {
|
|
predicate = baseCallback(predicate, thisArg, 3);
|
|
}
|
|
return func(collection, predicate);
|
|
}
|
|
|
|
/**
|
|
* Creates an array of elements, sorted in ascending order by the results of
|
|
* running each element in a collection through `iteratee`. This method performs
|
|
* a stable sort, that is, it preserves the original sort order of equal elements.
|
|
* The `iteratee` is bound to `thisArg` and invoked with three arguments;
|
|
* (value, index|key, collection).
|
|
*
|
|
* If a property name is provided for `iteratee` the created "_.pluck" style
|
|
* callback returns the property value of the given element.
|
|
*
|
|
* If an array of property names is provided for `iteratee` the collection
|
|
* is sorted by each property value.
|
|
*
|
|
* If an object is provided for `iteratee` the created "_.where" style callback
|
|
* returns `true` for elements that have the properties of the given object,
|
|
* else `false`.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Collection
|
|
* @param {Array|Object|string} collection The collection to iterate over.
|
|
* @param {Array|Function|Object|string} [iteratee=identity] The function
|
|
* invoked per iteration. If property name(s) or an object is provided it
|
|
* is used to create a "_.pluck" or "_.where" style callback respectively.
|
|
* @param {*} [thisArg] The `this` binding of `iteratee`.
|
|
* @returns {Array} Returns the new sorted array.
|
|
* @example
|
|
*
|
|
* _.sortBy([1, 2, 3], function(n) { return Math.sin(n); });
|
|
* // => [3, 1, 2]
|
|
*
|
|
* _.sortBy([1, 2, 3], function(n) { return this.sin(n); }, Math);
|
|
* // => [3, 1, 2]
|
|
*
|
|
* var users = [
|
|
* { 'user': 'barney', 'age': 36 },
|
|
* { 'user': 'fred', 'age': 40 },
|
|
* { 'user': 'barney', 'age': 26 },
|
|
* { 'user': 'fred', 'age': 30 }
|
|
* ];
|
|
*
|
|
* // using "_.pluck" callback shorthand
|
|
* _.map(_.sortBy(users, 'age'), _.values);
|
|
* // => [['barney', 26], ['fred', 30], ['barney', 36], ['fred', 40]]
|
|
*
|
|
* // sorting by multiple properties
|
|
* _.map(_.sortBy(users, ['user', 'age']), _.values);
|
|
* // = > [['barney', 26], ['barney', 36], ['fred', 30], ['fred', 40]]
|
|
*/
|
|
function sortBy(collection, iteratee, thisArg) {
|
|
iteratee = isIterateeCall(collection, iteratee, thisArg) ? null : iteratee;
|
|
|
|
var index = -1,
|
|
length = collection ? collection.length : 0,
|
|
result = [];
|
|
|
|
if (typeof length == 'number' && length > -1 && length <= MAX_SAFE_INTEGER) {
|
|
result.length = length;
|
|
}
|
|
iteratee = baseCallback(iteratee, thisArg, 3);
|
|
baseEach(collection, function(value, key, collection) {
|
|
result[++index] = {
|
|
'criteria': iteratee(value, key, collection),
|
|
'index': index,
|
|
'value': value
|
|
};
|
|
});
|
|
|
|
length = result.length;
|
|
result.sort(compareAscending);
|
|
while (length--) {
|
|
result[length] = result[length].value;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* Converts `collection` to an array.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Collection
|
|
* @param {Array|Object|string} collection The collection to convert.
|
|
* @returns {Array} Returns the new converted array.
|
|
* @example
|
|
*
|
|
* (function() { return _.toArray(arguments).slice(1); })(1, 2, 3, 4);
|
|
* // => [2, 3, 4]
|
|
*/
|
|
function toArray(collection) {
|
|
var length = collection ? collection.length : 0;
|
|
if (typeof length == 'number' && length > -1 && length <= MAX_SAFE_INTEGER) {
|
|
return baseSlice(collection);
|
|
}
|
|
return values(collection);
|
|
}
|
|
|
|
/**
|
|
* Performs a deep comparison between each element in `collection` and the
|
|
* source object, returning an array of all elements that have equivalent
|
|
* property values.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Collection
|
|
* @param {Array|Object|string} collection The collection to search.
|
|
* @param {Object} source The object of property values to match.
|
|
* @returns {Array} Returns the new filtered array.
|
|
* @example
|
|
*
|
|
* var users = [
|
|
* { 'user': 'barney', 'age': 36, 'employer': 'slate', 'pets': ['hoppy'] },
|
|
* { 'user': 'fred', 'age': 40, 'employer': 'slate', 'pets': ['baby puss', 'dino'] }
|
|
* ];
|
|
*
|
|
* _.pluck(_.where(users, { 'age': 36 }), 'user');
|
|
* // => ['barney']
|
|
*
|
|
* _.pluck(_.where(users, { 'pets': ['dino'] }), 'user');
|
|
* // => ['fred']
|
|
*
|
|
* _.pluck(_.where(users, { 'employer': 'slate' }), 'user');
|
|
* // => ['barney', 'fred']
|
|
*/
|
|
function where(collection, source) {
|
|
return filter(collection, matches(source));
|
|
}
|
|
|
|
/*------------------------------------------------------------------------*/
|
|
|
|
/**
|
|
* The opposite of `_.before`; this method creates a function that invokes
|
|
* `func` only after it is called `n` times.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Function
|
|
* @param {number} n The number of calls before `func` is invoked.
|
|
* @param {Function} func The function to restrict.
|
|
* @returns {Function} Returns the new restricted function.
|
|
* @example
|
|
*
|
|
* var saves = ['profile', 'settings'];
|
|
*
|
|
* var done = _.after(saves.length, function() {
|
|
* console.log('done saving!');
|
|
* });
|
|
*
|
|
* _.forEach(saves, function(type) {
|
|
* asyncSave({ 'type': type, 'complete': done });
|
|
* });
|
|
* // => logs 'done saving!' after the two async saves have completed
|
|
*/
|
|
function after(n, func) {
|
|
if (!isFunction(func)) {
|
|
if (isFunction(n)) {
|
|
var temp = n;
|
|
n = func;
|
|
func = temp;
|
|
} else {
|
|
throw new TypeError(FUNC_ERROR_TEXT);
|
|
}
|
|
}
|
|
n = nativeIsFinite(n = +n) ? n : 0;
|
|
return function() {
|
|
if (--n < 1) {
|
|
return func.apply(this, arguments);
|
|
}
|
|
};
|
|
}
|
|
|
|
/**
|
|
* Creates a function that invokes `func`, with the `this` binding and arguments
|
|
* of the created function, while it is called less than `n` times. Subsequent
|
|
* calls to the created function return the result of the last `func` invocation.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Function
|
|
* @param {number} n The number of calls at which `func` is no longer invoked.
|
|
* @param {Function} func The function to restrict.
|
|
* @returns {Function} Returns the new restricted function.
|
|
* @example
|
|
*
|
|
* jQuery('#add').on('click', _.before(5, addContactToList));
|
|
* // => allows adding up to 4 contacts to the list
|
|
*/
|
|
function before(n, func) {
|
|
var result;
|
|
if (!isFunction(func)) {
|
|
if (isFunction(n)) {
|
|
var temp = n;
|
|
n = func;
|
|
func = temp;
|
|
} else {
|
|
throw new TypeError(FUNC_ERROR_TEXT);
|
|
}
|
|
}
|
|
return function() {
|
|
if (--n > 0) {
|
|
result = func.apply(this, arguments);
|
|
} else {
|
|
func = null;
|
|
}
|
|
return result;
|
|
};
|
|
}
|
|
|
|
/**
|
|
* Creates a function that invokes `func` with the `this` binding of `thisArg`
|
|
* and prepends any additional `bind` arguments to those provided to the bound
|
|
* function.
|
|
*
|
|
* **Note:** Unlike native `Function#bind` this method does not set the `length`
|
|
* property of bound functions.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Function
|
|
* @param {Function} func The function to bind.
|
|
* @param {*} [thisArg] The `this` binding of `func`.
|
|
* @param {...*} [args] The arguments to be partially applied.
|
|
* @returns {Function} Returns the new bound function.
|
|
* @example
|
|
*
|
|
* var func = function(greeting) {
|
|
* return greeting + ' ' + this.user;
|
|
* };
|
|
*
|
|
* func = _.bind(func, { 'user': 'fred' }, 'hi');
|
|
* func();
|
|
* // => 'hi fred'
|
|
*/
|
|
function bind(func, thisArg) {
|
|
return arguments.length < 3
|
|
? createWrapper(func, BIND_FLAG, null, thisArg)
|
|
: basePartial(func, BIND_FLAG | PARTIAL_FLAG, slice(arguments, 2), [], thisArg);
|
|
}
|
|
|
|
/**
|
|
* Binds methods of an object to the object itself, overwriting the existing
|
|
* method. Method names may be specified as individual arguments or as arrays
|
|
* of method names. If no method names are provided all enumerable function
|
|
* properties, own and inherited, of `object` are bound.
|
|
*
|
|
* **Note:** This method does not set the `length` property of bound functions.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Function
|
|
* @param {Object} object The object to bind and assign the bound methods to.
|
|
* @param {...(string|string[])} [methodNames] The object method names to bind,
|
|
* specified as individual method names or arrays of method names.
|
|
* @returns {Object} Returns `object`.
|
|
* @example
|
|
*
|
|
* var view = {
|
|
* 'label': 'docs',
|
|
* 'onClick': function() { console.log('clicked ' + this.label); }
|
|
* };
|
|
*
|
|
* _.bindAll(view);
|
|
* jQuery('#docs').on('click', view.onClick);
|
|
* // => logs 'clicked docs' when the element is clicked
|
|
*/
|
|
function bindAll(object) {
|
|
return baseBindAll(object,
|
|
arguments.length > 1
|
|
? baseFlatten(arguments, false, false, 1)
|
|
: functions(object)
|
|
);
|
|
}
|
|
|
|
/**
|
|
* Creates a function that delays invoking `func` until after `wait` milliseconds
|
|
* have elapsed since the last time it was invoked. The created function comes
|
|
* with a `cancel` method to cancel delayed invocations. Provide an options
|
|
* object to indicate that `func` should be invoked on the leading and/or
|
|
* trailing edge of the `wait` timeout. Subsequent calls to the debounced
|
|
* function return the result of the last `func` invocation.
|
|
*
|
|
* **Note:** If `leading` and `trailing` options are `true`, `func` is invoked
|
|
* on the trailing edge of the timeout only if the the debounced function is
|
|
* invoked more than once during the `wait` timeout.
|
|
*
|
|
* See [David Corbacho's article](http://drupalmotion.com/article/debounce-and-throttle-visual-explanation)
|
|
* for details over the differences between `_.debounce` and `_.throttle`.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Function
|
|
* @param {Function} func The function to debounce.
|
|
* @param {number} wait The number of milliseconds to delay.
|
|
* @param {Object} [options] The options object.
|
|
* @param {boolean} [options.leading=false] Specify invoking on the leading
|
|
* edge of the timeout.
|
|
* @param {number} [options.maxWait] The maximum time `func` is allowed to be
|
|
* delayed before it is invoked.
|
|
* @param {boolean} [options.trailing=true] Specify invoking on the trailing
|
|
* edge of the timeout.
|
|
* @returns {Function} Returns the new debounced function.
|
|
* @example
|
|
*
|
|
* // avoid costly calculations while the window size is in flux
|
|
* jQuery(window).on('resize', _.debounce(calculateLayout, 150));
|
|
*
|
|
* // invoke `sendMail` when the click event is fired, debouncing subsequent calls
|
|
* jQuery('#postbox').on('click', _.debounce(sendMail, 300, {
|
|
* 'leading': true,
|
|
* 'trailing': false
|
|
* });
|
|
*
|
|
* // ensure `batchLog` is invoked once after 1 second of debounced calls
|
|
* var source = new EventSource('/stream');
|
|
* jQuery(source).on('message', _.debounce(batchLog, 250, {
|
|
* 'maxWait': 1000
|
|
* }, false);
|
|
*
|
|
* // cancel a debounced call
|
|
* var todoChanges = _.debounce(batchLog, 1000);
|
|
* Object.observe(models.todo, todoChanges);
|
|
*
|
|
* Object.observe(models, function(changes) {
|
|
* if (_.find(changes, { 'user': 'todo', 'type': 'delete'})) {
|
|
* todoChanges.cancel();
|
|
* }
|
|
* }, ['delete']);
|
|
*
|
|
* // ...at some point `models.todo` is changed
|
|
* models.todo.completed = true;
|
|
*
|
|
* // ...before 1 second has passed `models.todo` is deleted
|
|
* // which cancels the debounced `todoChanges` call
|
|
* delete models.todo;
|
|
*/
|
|
function debounce(func, wait, options) {
|
|
var args,
|
|
maxTimeoutId,
|
|
result,
|
|
stamp,
|
|
thisArg,
|
|
timeoutId,
|
|
trailingCall,
|
|
lastCalled = 0,
|
|
maxWait = false,
|
|
trailing = true;
|
|
|
|
if (!isFunction(func)) {
|
|
throw new TypeError(FUNC_ERROR_TEXT);
|
|
}
|
|
wait = wait < 0 ? 0 : wait;
|
|
if (options === true) {
|
|
var leading = true;
|
|
trailing = false;
|
|
} else if (isObject(options)) {
|
|
leading = options.leading;
|
|
maxWait = 'maxWait' in options && nativeMax(+options.maxWait || 0, wait);
|
|
trailing = 'trailing' in options ? options.trailing : trailing;
|
|
}
|
|
|
|
function cancel() {
|
|
if (timeoutId) {
|
|
clearTimeout(timeoutId);
|
|
}
|
|
if (maxTimeoutId) {
|
|
clearTimeout(maxTimeoutId);
|
|
}
|
|
maxTimeoutId = timeoutId = trailingCall = undefined;
|
|
}
|
|
|
|
function delayed() {
|
|
var remaining = wait - (now() - stamp);
|
|
if (remaining <= 0 || remaining > wait) {
|
|
if (maxTimeoutId) {
|
|
clearTimeout(maxTimeoutId);
|
|
}
|
|
var isCalled = trailingCall;
|
|
maxTimeoutId = timeoutId = trailingCall = undefined;
|
|
if (isCalled) {
|
|
lastCalled = now();
|
|
result = func.apply(thisArg, args);
|
|
if (!timeoutId && !maxTimeoutId) {
|
|
args = thisArg = null;
|
|
}
|
|
}
|
|
} else {
|
|
timeoutId = setTimeout(delayed, remaining);
|
|
}
|
|
}
|
|
|
|
function maxDelayed() {
|
|
if (timeoutId) {
|
|
clearTimeout(timeoutId);
|
|
}
|
|
maxTimeoutId = timeoutId = trailingCall = undefined;
|
|
if (trailing || (maxWait !== wait)) {
|
|
lastCalled = now();
|
|
result = func.apply(thisArg, args);
|
|
if (!timeoutId && !maxTimeoutId) {
|
|
args = thisArg = null;
|
|
}
|
|
}
|
|
}
|
|
|
|
function debounced() {
|
|
args = arguments;
|
|
stamp = now();
|
|
thisArg = this;
|
|
trailingCall = trailing && (timeoutId || !leading);
|
|
|
|
if (maxWait === false) {
|
|
var leadingCall = leading && !timeoutId;
|
|
} else {
|
|
if (!maxTimeoutId && !leading) {
|
|
lastCalled = stamp;
|
|
}
|
|
var remaining = maxWait - (stamp - lastCalled),
|
|
isCalled = remaining <= 0 || remaining > maxWait;
|
|
|
|
if (isCalled) {
|
|
if (maxTimeoutId) {
|
|
maxTimeoutId = clearTimeout(maxTimeoutId);
|
|
}
|
|
lastCalled = stamp;
|
|
result = func.apply(thisArg, args);
|
|
}
|
|
else if (!maxTimeoutId) {
|
|
maxTimeoutId = setTimeout(maxDelayed, remaining);
|
|
}
|
|
}
|
|
if (isCalled && timeoutId) {
|
|
timeoutId = clearTimeout(timeoutId);
|
|
}
|
|
else if (!timeoutId && wait !== maxWait) {
|
|
timeoutId = setTimeout(delayed, wait);
|
|
}
|
|
if (leadingCall) {
|
|
isCalled = true;
|
|
result = func.apply(thisArg, args);
|
|
}
|
|
if (isCalled && !timeoutId && !maxTimeoutId) {
|
|
args = thisArg = null;
|
|
}
|
|
return result;
|
|
}
|
|
debounced.cancel = cancel;
|
|
return debounced;
|
|
}
|
|
|
|
/**
|
|
* Defers invoking the `func` until the current call stack has cleared. Any
|
|
* additional arguments are provided to `func` when it is invoked.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Function
|
|
* @param {Function} func The function to defer.
|
|
* @param {...*} [args] The arguments to invoke the function with.
|
|
* @returns {number} Returns the timer id.
|
|
* @example
|
|
*
|
|
* _.defer(function(text) { console.log(text); }, 'deferred');
|
|
* // logs 'deferred' after one or more milliseconds
|
|
*/
|
|
function defer(func) {
|
|
if (!isFunction(func)) {
|
|
throw new TypeError(FUNC_ERROR_TEXT);
|
|
}
|
|
var args = slice(arguments, 1);
|
|
return setTimeout(function() { func.apply(undefined, args); }, 1);
|
|
}
|
|
|
|
/**
|
|
* Invokes `func` after `wait` milliseconds. Any additional arguments are
|
|
* provided to `func` when it is invoked.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Function
|
|
* @param {Function} func The function to delay.
|
|
* @param {number} wait The number of milliseconds to delay invocation.
|
|
* @param {...*} [args] The arguments to invoke the function with.
|
|
* @returns {number} Returns the timer id.
|
|
* @example
|
|
*
|
|
* _.delay(function(text) { console.log(text); }, 1000, 'later');
|
|
* // => logs 'later' after one second
|
|
*/
|
|
function delay(func, wait) {
|
|
if (!isFunction(func)) {
|
|
throw new TypeError(FUNC_ERROR_TEXT);
|
|
}
|
|
var args = slice(arguments, 2);
|
|
return setTimeout(function() { func.apply(undefined, args); }, wait);
|
|
}
|
|
|
|
/**
|
|
* This method is like `_.flow` except that it creates a function that
|
|
* invokes the provided functions from right to left.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @alias backflow, compose
|
|
* @category Function
|
|
* @param {...Function} [funcs] Functions to invoke.
|
|
* @returns {Function} Returns the new function.
|
|
* @example
|
|
*
|
|
* function add(x, y) {
|
|
* return x + y;
|
|
* }
|
|
*
|
|
* function square(n) {
|
|
* return n * n;
|
|
* }
|
|
*
|
|
* var addSquare = _.flowRight(square, add);
|
|
* addSquare(1, 2);
|
|
* // => 9
|
|
*/
|
|
function flowRight() {
|
|
var funcs = arguments,
|
|
fromIndex = funcs.length - 1;
|
|
|
|
if (fromIndex < 0) {
|
|
return function() {};
|
|
}
|
|
if (!arrayEvery(funcs, isFunction)) {
|
|
throw new TypeError(FUNC_ERROR_TEXT);
|
|
}
|
|
return function() {
|
|
var index = fromIndex,
|
|
result = funcs[index].apply(this, arguments);
|
|
|
|
while (index--) {
|
|
result = funcs[index].call(this, result);
|
|
}
|
|
return result;
|
|
};
|
|
}
|
|
|
|
/**
|
|
* Creates a function that memoizes the result of `func`. If `resolver` is
|
|
* provided it determines the cache key for storing the result based on the
|
|
* arguments provided to the memoized function. By default, the first argument
|
|
* provided to the memoized function is used as the cache key. The `func` is
|
|
* invoked with the `this` binding of the memoized function. The result cache
|
|
* is exposed as the `cache` property on the memoized function.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Function
|
|
* @param {Function} func The function to have its output memoized.
|
|
* @param {Function} [resolver] The function to resolve the cache key.
|
|
* @returns {Function} Returns the new memoizing function.
|
|
* @example
|
|
*
|
|
* var fibonacci = _.memoize(function(n) {
|
|
* return n < 2 ? n : fibonacci(n - 1) + fibonacci(n - 2);
|
|
* });
|
|
*
|
|
* fibonacci(9)
|
|
* // => 34
|
|
*
|
|
* // modifying the result cache
|
|
* var upperCase = _.memoize(function(string) {
|
|
* return string.toUpperCase();
|
|
* });
|
|
*
|
|
* upperCase('fred');
|
|
* // => 'FRED'
|
|
*
|
|
* upperCase.cache.fred = 'BARNEY'
|
|
* upperCase('fred');
|
|
* // => 'BARNEY'
|
|
*/
|
|
function memoize(func, resolver) {
|
|
if (!isFunction(func) || (resolver && !isFunction(resolver))) {
|
|
throw new TypeError(FUNC_ERROR_TEXT);
|
|
}
|
|
var memoized = function() {
|
|
var key = resolver ? resolver.apply(this, arguments) : arguments[0];
|
|
if (key == '__proto__') {
|
|
return func.apply(this, arguments);
|
|
}
|
|
var cache = memoized.cache;
|
|
return hasOwnProperty.call(cache, key)
|
|
? cache[key]
|
|
: (cache[key] = func.apply(this, arguments));
|
|
};
|
|
memoized.cache = {};
|
|
return memoized;
|
|
}
|
|
|
|
/**
|
|
* Creates a function that negates the result of the predicate `func`. The
|
|
* `func` predicate is invoked with the `this` binding and arguments of the
|
|
* created function.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Function
|
|
* @param {Function} predicate The predicate to negate.
|
|
* @returns {Function} Returns the new function.
|
|
* @example
|
|
*
|
|
* function isEven(n) {
|
|
* return n % 2 == 0;
|
|
* }
|
|
*
|
|
* _.filter([1, 2, 3, 4, 5, 6], _.negate(isEven));
|
|
* // => [1, 3, 5]
|
|
*/
|
|
function negate(predicate) {
|
|
if (!isFunction(predicate)) {
|
|
throw new TypeError(FUNC_ERROR_TEXT);
|
|
}
|
|
return function() {
|
|
return !predicate.apply(this, arguments);
|
|
};
|
|
}
|
|
|
|
/**
|
|
* Creates a function that is restricted to invoking `func` once. Repeat calls
|
|
* to the function return the value of the first call. The `func` is invoked
|
|
* with the `this` binding of the created function.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @type Function
|
|
* @category Function
|
|
* @param {Function} func The function to restrict.
|
|
* @returns {Function} Returns the new restricted function.
|
|
* @example
|
|
*
|
|
* var initialize = _.once(createApplication);
|
|
* initialize();
|
|
* initialize();
|
|
* // `initialize` invokes `createApplication` once
|
|
*/
|
|
var once = partial(before, 2);
|
|
|
|
/**
|
|
* Creates a function that invokes `func` with `partial` arguments prepended
|
|
* to those provided to the new function. This method is similar to `_.bind`
|
|
* except it does **not** alter the `this` binding.
|
|
*
|
|
* **Note:** This method does not set the `length` property of partially
|
|
* applied functions.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Function
|
|
* @param {Function} func The function to partially apply arguments to.
|
|
* @param {...*} [args] The arguments to be partially applied.
|
|
* @returns {Function} Returns the new partially applied function.
|
|
* @example
|
|
*
|
|
* var greet = function(greeting, name) { return greeting + ' ' + name; };
|
|
* var sayHelloTo = _.partial(greet, 'hello');
|
|
* sayHelloTo('fred');
|
|
* // => 'hello fred'
|
|
*/
|
|
function partial(func) {
|
|
var args = slice(arguments, 1),
|
|
holders = replaceHolders(args, partial.placeholder);
|
|
|
|
return basePartial(func, PARTIAL_FLAG, args, holders);
|
|
}
|
|
|
|
/**
|
|
* Creates a function that only invokes `func` at most once per every `wait`
|
|
* milliseconds. The created function comes with a `cancel` method to cancel
|
|
* delayed invocations. Provide an options object to indicate that `func`
|
|
* should be invoked on the leading and/or trailing edge of the `wait` timeout.
|
|
* Subsequent calls to the throttled function return the result of the last
|
|
* `func` call.
|
|
*
|
|
* **Note:** If `leading` and `trailing` options are `true`, `func` is invoked
|
|
* on the trailing edge of the timeout only if the the throttled function is
|
|
* invoked more than once during the `wait` timeout.
|
|
*
|
|
* See [David Corbacho's article](http://drupalmotion.com/article/debounce-and-throttle-visual-explanation)
|
|
* for details over the differences between `_.throttle` and `_.debounce`.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Function
|
|
* @param {Function} func The function to throttle.
|
|
* @param {number} wait The number of milliseconds to throttle invocations to.
|
|
* @param {Object} [options] The options object.
|
|
* @param {boolean} [options.leading=true] Specify invoking on the leading
|
|
* edge of the timeout.
|
|
* @param {boolean} [options.trailing=true] Specify invoking on the trailing
|
|
* edge of the timeout.
|
|
* @returns {Function} Returns the new throttled function.
|
|
* @example
|
|
*
|
|
* // avoid excessively updating the position while scrolling
|
|
* jQuery(window).on('scroll', _.throttle(updatePosition, 100));
|
|
*
|
|
* // invoke `renewToken` when the click event is fired, but not more than once every 5 minutes
|
|
* var throttled = _.throttle(renewToken, 300000, { 'trailing': false })
|
|
* jQuery('.interactive').on('click', throttled);
|
|
*
|
|
* // cancel a trailing throttled call
|
|
* jQuery(window).on('popstate', throttled.cancel);
|
|
*/
|
|
function throttle(func, wait, options) {
|
|
var leading = true,
|
|
trailing = true;
|
|
|
|
if (!isFunction(func)) {
|
|
throw new TypeError(funcErrorText);
|
|
}
|
|
if (options === false) {
|
|
leading = false;
|
|
} else if (isObject(options)) {
|
|
leading = 'leading' in options ? options.leading : leading;
|
|
trailing = 'trailing' in options ? options.trailing : trailing;
|
|
}
|
|
return debounce(func, wait, {
|
|
'leading': leading,
|
|
'maxWait': wait,
|
|
'trailing': trailing
|
|
});
|
|
}
|
|
|
|
/**
|
|
* Creates a function that provides `value` to the wrapper function as its
|
|
* first argument. Any additional arguments provided to the function are
|
|
* appended to those provided to the wrapper function. The wrapper is invoked
|
|
* with the `this` binding of the created function.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Function
|
|
* @param {*} value The value to wrap.
|
|
* @param {Function} wrapper The wrapper function.
|
|
* @returns {Function} Returns the new function.
|
|
* @example
|
|
*
|
|
* var p = _.wrap(_.escape, function(func, text) {
|
|
* return '<p>' + func(text) + '</p>';
|
|
* });
|
|
*
|
|
* p('fred, barney, & pebbles');
|
|
* // => '<p>fred, barney, & pebbles</p>'
|
|
*/
|
|
function wrap(value, wrapper) {
|
|
return basePartial(wrapper, PARTIAL_FLAG, [value], []);
|
|
}
|
|
|
|
/*------------------------------------------------------------------------*/
|
|
|
|
/**
|
|
* Creates a clone of `value`. If `isDeep` is `true` nested objects are cloned,
|
|
* otherwise they are assigned by reference. If `customizer` is provided it is
|
|
* invoked to produce the cloned values. If `customizer` returns `undefined`
|
|
* cloning is handled by the method instead. The `customizer` is bound to
|
|
* `thisArg` and invoked with two argument; (value, index|key).
|
|
*
|
|
* **Note:** This method is loosely based on the structured clone algorithm. Functions
|
|
* and DOM nodes are **not** cloned. The enumerable properties of `arguments` objects and
|
|
* objects created by constructors other than `Object` are cloned to plain `Object` objects.
|
|
* See the [HTML5 specification](http://www.w3.org/TR/html5/infrastructure.html#internal-structured-cloning-algorithm)
|
|
* for more details.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Lang
|
|
* @param {*} value The value to clone.
|
|
* @param {boolean} [isDeep=false] Specify a deep clone.
|
|
* @param {Function} [customizer] The function to customize cloning values.
|
|
* @param {*} [thisArg] The `this` binding of `customizer`.
|
|
* @returns {*} Returns the cloned value.
|
|
* @example
|
|
*
|
|
* var users = [
|
|
* { 'user': 'barney', 'age': 36 },
|
|
* { 'user': 'fred', 'age': 40 }
|
|
* ];
|
|
*
|
|
* var shallow = _.clone(users);
|
|
* shallow[0] === users[0];
|
|
* // => true
|
|
*
|
|
* var deep = _.clone(users, true);
|
|
* deep[0] === users[0];
|
|
* // => false
|
|
*
|
|
* _.mixin({
|
|
* 'clone': _.partialRight(_.clone, function(value) {
|
|
* return _.isElement(value) ? value.cloneNode(false) : undefined;
|
|
* })
|
|
* });
|
|
*
|
|
* var clone = _.clone(document.body);
|
|
* clone.childNodes.length;
|
|
* // => 0
|
|
*/
|
|
function clone(value) {
|
|
return isObject(value)
|
|
? (isArray(value) ? baseSlice(value) : assign({}, value))
|
|
: value;
|
|
}
|
|
|
|
/**
|
|
* Checks if `value` is classified as an `arguments` object.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Lang
|
|
* @param {*} value The value to check.
|
|
* @returns {boolean} Returns `true` if `value` is an `arguments` object, else `false`.
|
|
* @example
|
|
*
|
|
* (function() { return _.isArguments(arguments); })();
|
|
* // => true
|
|
*
|
|
* _.isArguments([1, 2, 3]);
|
|
* // => false
|
|
*/
|
|
function isArguments(value) {
|
|
var length = (value && typeof value == 'object') ? value.length : undefined;
|
|
return (typeof length == 'number' && length > -1 && length <= MAX_SAFE_INTEGER &&
|
|
toString.call(value) == argsClass) || false;
|
|
}
|
|
// fallback for environments without a `[[Class]]` for `arguments` objects
|
|
if (!isArguments(arguments)) {
|
|
isArguments = function(value) {
|
|
var length = (value && typeof value == 'object') ? value.length : undefined;
|
|
return (typeof length == 'number' && length > -1 && length <= MAX_SAFE_INTEGER &&
|
|
hasOwnProperty.call(value, 'callee') && !propertyIsEnumerable.call(value, 'callee')) || false;
|
|
};
|
|
}
|
|
|
|
/**
|
|
* Checks if `value` is classified as an `Array` object.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Lang
|
|
* @param {*} value The value to check.
|
|
* @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
|
|
* @example
|
|
*
|
|
* _.isArray([1, 2, 3]);
|
|
* // => true
|
|
*
|
|
* (function() { return _.isArray(arguments); })();
|
|
* // => false
|
|
*/
|
|
var isArray = nativeIsArray || function(value) {
|
|
return (value && typeof value == 'object' && typeof value.length == 'number' &&
|
|
toString.call(value) == arrayClass) || false;
|
|
};
|
|
|
|
/**
|
|
* Checks if `value` is classified as a boolean primitive or object.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Lang
|
|
* @param {*} value The value to check.
|
|
* @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
|
|
* @example
|
|
*
|
|
* _.isBoolean(false);
|
|
* // => true
|
|
*
|
|
* _.isBoolean(null);
|
|
* // => false
|
|
*/
|
|
function isBoolean(value) {
|
|
return (value === true || value === false || value && typeof value == 'object' &&
|
|
toString.call(value) == boolClass) || false;
|
|
}
|
|
|
|
/**
|
|
* Checks if `value` is classified as a `Date` object.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Lang
|
|
* @param {*} value The value to check.
|
|
* @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
|
|
* @example
|
|
*
|
|
* _.isDate(new Date);
|
|
* // => true
|
|
*
|
|
* _.isDate('Mon April 23 2012');
|
|
* // => false
|
|
*/
|
|
function isDate(value) {
|
|
return (value && typeof value == 'object' && toString.call(value) == dateClass) || false;
|
|
}
|
|
|
|
/**
|
|
* Checks if `value` is a DOM element.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Lang
|
|
* @param {*} value The value to check.
|
|
* @returns {boolean} Returns `true` if `value` is a DOM element, else `false`.
|
|
* @example
|
|
*
|
|
* _.isElement(document.body);
|
|
* // => true
|
|
*
|
|
* _.isElement('<body>');
|
|
* // => false
|
|
*/
|
|
function isElement(value) {
|
|
return (value && value.nodeType === 1) || false;
|
|
}
|
|
|
|
/**
|
|
* Checks if a collection is empty. A value is considered empty unless it is
|
|
* an array-like value with a length greater than `0` or an object with own
|
|
* enumerable properties.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Lang
|
|
* @param {Array|Object|string} value The value to inspect.
|
|
* @returns {boolean} Returns `true` if `value` is empty, else `false`.
|
|
* @example
|
|
*
|
|
* _.isEmpty(null);
|
|
* // => true
|
|
*
|
|
* _.isEmpty(true);
|
|
* // => true
|
|
*
|
|
* _.isEmpty(1);
|
|
* // => true
|
|
*
|
|
* _.isEmpty([1, 2, 3]);
|
|
* // => false
|
|
*
|
|
* _.isEmpty({ 'a': 1 });
|
|
* // => false
|
|
*/
|
|
function isEmpty(value) {
|
|
if (value == null) {
|
|
return true;
|
|
}
|
|
var length = value.length;
|
|
if ((typeof length == 'number' && length > -1 && length <= MAX_SAFE_INTEGER) &&
|
|
(isArray(value) || isString(value) || isArguments(value))) {
|
|
return !length;
|
|
}
|
|
return !keys(value).length;
|
|
}
|
|
|
|
/**
|
|
* Performs a deep comparison between two values to determine if they are
|
|
* equivalent. If `customizer` is provided it is invoked to compare values.
|
|
* If `customizer` returns `undefined` comparisons are handled by the method
|
|
* instead. The `customizer` is bound to `thisArg` and invoked with three
|
|
* arguments; (value, other, key).
|
|
*
|
|
* **Note:** This method supports comparing arrays, booleans, `Date` objects,
|
|
* numbers, `Object` objects, regexes, and strings. Functions and DOM nodes
|
|
* are **not** supported. Provide a customizer function to extend support
|
|
* for comparing other values.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Lang
|
|
* @param {*} value The value to compare to `other`.
|
|
* @param {*} other The value to compare to `value`.
|
|
* @param {Function} [customizer] The function to customize comparing values.
|
|
* @param {*} [thisArg] The `this` binding of `customizer`.
|
|
* @returns {boolean} Returns `true` if the values are equivalent, else `false`.
|
|
* @example
|
|
*
|
|
* var object = { 'user': 'fred' };
|
|
* var other = { 'user': 'fred' };
|
|
*
|
|
* object == other;
|
|
* // => false
|
|
*
|
|
* _.isEqual(object, other);
|
|
* // => true
|
|
*
|
|
* var words = ['hello', 'goodbye'];
|
|
* var otherWords = ['hi', 'goodbye'];
|
|
*
|
|
* _.isEqual(words, otherWords, function() {
|
|
* return _.every(arguments, _.bind(RegExp.prototype.test, /^h(?:i|ello)$/)) || undefined;
|
|
* });
|
|
* // => true
|
|
*/
|
|
function isEqual(value, other) {
|
|
return baseIsEqual(value, other);
|
|
}
|
|
|
|
/**
|
|
* Checks if `value` is an `Error`, `EvalError`, `RangeError`, `ReferenceError`,
|
|
* `SyntaxError`, `TypeError`, or `URIError` object.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Lang
|
|
* @param {*} value The value to check.
|
|
* @returns {boolean} Returns `true` if `value` is an error object, else `false`.
|
|
* @example
|
|
*
|
|
* _.isError(new Error);
|
|
* // => true
|
|
*
|
|
* _.isError(Error);
|
|
* // => false
|
|
*/
|
|
function isError(value) {
|
|
return (value && typeof value == 'object' && toString.call(value) == errorClass) || false;
|
|
}
|
|
|
|
/**
|
|
* Checks if `value` is a finite primitive number.
|
|
*
|
|
* **Note:** This method is based on ES6 `Number.isFinite`. See the
|
|
* [ES6 spec](http://people.mozilla.org/~jorendorff/es6-draft.html#sec-number.isfinite)
|
|
* for more details.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Lang
|
|
* @param {*} value The value to check.
|
|
* @returns {boolean} Returns `true` if `value` is a finite number, else `false`.
|
|
* @example
|
|
*
|
|
* _.isFinite(10);
|
|
* // => true
|
|
*
|
|
* _.isFinite('10');
|
|
* // => false
|
|
*
|
|
* _.isFinite(true);
|
|
* // => false
|
|
*
|
|
* _.isFinite(Object(10));
|
|
* // => false
|
|
*
|
|
* _.isFinite(Infinity);
|
|
* // => false
|
|
*/
|
|
function isFinite(value) {
|
|
value = parseFloat(nativeIsFinite(value) && value);
|
|
return value == value;
|
|
}
|
|
|
|
/**
|
|
* Checks if `value` is classified as a `Function` object.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Lang
|
|
* @param {*} value The value to check.
|
|
* @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
|
|
* @example
|
|
*
|
|
* _.isFunction(_);
|
|
* // => true
|
|
*
|
|
* _.isFunction(/abc/);
|
|
* // => false
|
|
*/
|
|
function isFunction(value) {
|
|
// avoid a Chakra bug in IE 11
|
|
// https://github.com/jashkenas/underscore/issues/1621
|
|
return typeof value == 'function' || false;
|
|
}
|
|
// fallback for older versions of Chrome and Safari
|
|
if (isFunction(/x/)) {
|
|
isFunction = function(value) {
|
|
return typeof value == 'function' && toString.call(value) == funcClass;
|
|
};
|
|
}
|
|
|
|
/**
|
|
* Checks if `value` is the language type of `Object`.
|
|
* (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
|
|
*
|
|
* **Note:** See the [ES5 spec](http://es5.github.io/#x8) for more details.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Lang
|
|
* @param {*} value The value to check.
|
|
* @returns {boolean} Returns `true` if `value` is an object, else `false`.
|
|
* @example
|
|
*
|
|
* _.isObject({});
|
|
* // => true
|
|
*
|
|
* _.isObject([1, 2, 3]);
|
|
* // => true
|
|
*
|
|
* _.isObject(1);
|
|
* // => false
|
|
*/
|
|
function isObject(value) {
|
|
// avoid a V8 bug in Chrome 19-20
|
|
// https://code.google.com/p/v8/issues/detail?id=2291
|
|
var type = typeof value;
|
|
return type == 'function' || (value && type == 'object') || false;
|
|
}
|
|
|
|
/**
|
|
* Checks if `value` is `NaN`.
|
|
*
|
|
* **Note:** This method is not the same as native `isNaN` which returns `true`
|
|
* for `undefined` and other non-numeric values. See the [ES5 spec](http://es5.github.io/#x15.1.2.4)
|
|
* for more details.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Lang
|
|
* @param {*} value The value to check.
|
|
* @returns {boolean} Returns `true` if `value` is `NaN`, else `false`.
|
|
* @example
|
|
*
|
|
* _.isNaN(NaN);
|
|
* // => true
|
|
*
|
|
* _.isNaN(new Number(NaN));
|
|
* // => true
|
|
*
|
|
* isNaN(undefined);
|
|
* // => true
|
|
*
|
|
* _.isNaN(undefined);
|
|
* // => false
|
|
*/
|
|
function isNaN(value) {
|
|
// `NaN` as a primitive is the only value that is not equal to itself
|
|
// (perform the `[[Class]]` check first to avoid errors with some host objects in IE)
|
|
return isNumber(value) && value != +value;
|
|
}
|
|
|
|
/**
|
|
* Checks if `value` is a native function.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Lang
|
|
* @param {*} value The value to check.
|
|
* @returns {boolean} Returns `true` if `value` is a native function, else `false`.
|
|
* @example
|
|
*
|
|
* _.isNative(Array.prototype.push);
|
|
* // => true
|
|
*
|
|
* _.isNative(_);
|
|
* // => false
|
|
*/
|
|
function isNative(value) {
|
|
if (isFunction(value)) {
|
|
return reNative.test(fnToString.call(value));
|
|
}
|
|
return (value && typeof value == 'object' && reHostCtor.test(value)) || false;
|
|
}
|
|
|
|
/**
|
|
* Checks if `value` is `null`.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Lang
|
|
* @param {*} value The value to check.
|
|
* @returns {boolean} Returns `true` if `value` is `null`, else `false`.
|
|
* @example
|
|
*
|
|
* _.isNull(null);
|
|
* // => true
|
|
*
|
|
* _.isNull(void 0);
|
|
* // => false
|
|
*/
|
|
function isNull(value) {
|
|
return value === null;
|
|
}
|
|
|
|
/**
|
|
* Checks if `value` is classified as a `Number` primitive or object.
|
|
*
|
|
* **Note:** To exclude `Infinity`, `-Infinity`, and `NaN`, which are classified
|
|
* as numbers, use the `_.isFinite` method.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Lang
|
|
* @param {*} value The value to check.
|
|
* @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
|
|
* @example
|
|
*
|
|
* _.isNumber(8.4);
|
|
* // => true
|
|
*
|
|
* _.isNumber(NaN);
|
|
* // => true
|
|
*
|
|
* _.isNumber('8.4');
|
|
* // => false
|
|
*/
|
|
function isNumber(value) {
|
|
var type = typeof value;
|
|
return type == 'number' || (value && type == 'object' && toString.call(value) == numberClass) || false;
|
|
}
|
|
|
|
/**
|
|
* Checks if `value` is classified as a `RegExp` object.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Lang
|
|
* @param {*} value The value to check.
|
|
* @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
|
|
* @example
|
|
*
|
|
* _.isRegExp(/abc/);
|
|
* // => true
|
|
*
|
|
* _.isRegExp('/abc/');
|
|
* // => false
|
|
*/
|
|
function isRegExp(value) {
|
|
return (isObject(value) && toString.call(value) == regexpClass) || false;
|
|
}
|
|
|
|
/**
|
|
* Checks if `value` is classified as a `String` primitive or object.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Lang
|
|
* @param {*} value The value to check.
|
|
* @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
|
|
* @example
|
|
*
|
|
* _.isString('abc');
|
|
* // => true
|
|
*
|
|
* _.isString(1);
|
|
* // => false
|
|
*/
|
|
function isString(value) {
|
|
return typeof value == 'string' || (value && typeof value == 'object' &&
|
|
toString.call(value) == stringClass) || false;
|
|
}
|
|
|
|
/**
|
|
* Checks if `value` is `undefined`.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Lang
|
|
* @param {*} value The value to check.
|
|
* @returns {boolean} Returns `true` if `value` is `undefined`, else `false`.
|
|
* @example
|
|
*
|
|
* _.isUndefined(void 0);
|
|
* // => true
|
|
*
|
|
* _.isUndefined(null);
|
|
* // => false
|
|
*/
|
|
function isUndefined(value) {
|
|
return typeof value == 'undefined';
|
|
}
|
|
|
|
/*------------------------------------------------------------------------*/
|
|
|
|
/**
|
|
* Assigns own enumerable properties of source object(s) to the destination
|
|
* object. Subsequent sources overwrite property assignments of previous sources.
|
|
* If `customizer` is provided it is invoked to produce the assigned values.
|
|
* The `customizer` is bound to `thisArg` and invoked with five arguments;
|
|
* (objectValue, sourceValue, key, object, source).
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @alias extend
|
|
* @category Object
|
|
* @param {Object} object The destination object.
|
|
* @param {...Object} [sources] The source objects.
|
|
* @param {Function} [customizer] The function to customize assigning values.
|
|
* @param {*} [thisArg] The `this` binding of `customizer`.
|
|
* @returns {Object} Returns the destination object.
|
|
* @example
|
|
*
|
|
* _.assign({ 'user': 'fred' }, { 'age': 40 }, { 'employer': 'slate' });
|
|
* // => { 'user': 'fred', 'age': 40, 'employer': 'slate' }
|
|
*
|
|
* var defaults = _.partialRight(_.assign, function(value, other) {
|
|
* return typeof value == 'undefined' ? other : value;
|
|
* });
|
|
*
|
|
* defaults({ 'user': 'barney' }, { 'age': 36 }, { 'user': 'fred', 'employer': 'slate' });
|
|
* // => { 'user': 'barney', 'age': 36, 'employer': 'slate' }
|
|
*/
|
|
function assign(object) {
|
|
if (object == null) {
|
|
return object;
|
|
}
|
|
var args = arguments,
|
|
index = 0,
|
|
length = args.length;
|
|
|
|
if (isIterateeCall(args[1], args[2], args[3])) {
|
|
length = 2;
|
|
}
|
|
while (++index < length) {
|
|
baseAssign(object, args[index]);
|
|
}
|
|
return object;
|
|
}
|
|
|
|
/**
|
|
* Assigns own enumerable properties of source object(s) to the destination
|
|
* object for all destination properties that resolve to `undefined`. Once a
|
|
* property is set, additional defaults of the same property are ignored.
|
|
*
|
|
* **Note:** See the [documentation example of `_.partialRight`](http://lodash.com/docs#partialRight)
|
|
* for a deep version of this method.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Object
|
|
* @param {Object} object The destination object.
|
|
* @param {...Object} [sources] The source objects.
|
|
* @returns {Object} Returns the destination object.
|
|
* @example
|
|
*
|
|
* _.defaults({ 'user': 'barney' }, { 'age': 36 }, { 'user': 'fred', 'employer': 'slate' });
|
|
* // => { 'user': 'barney', 'age': 36, 'employer': 'slate' }
|
|
*/
|
|
function defaults(object) {
|
|
if (object == null) {
|
|
return object;
|
|
}
|
|
var args = arguments,
|
|
index = 0,
|
|
length = args.length;
|
|
|
|
if (isIterateeCall(args[1], args[2], args[3])) {
|
|
length = 2;
|
|
}
|
|
while (++index < length) {
|
|
var source = args[index];
|
|
for (var key in source) {
|
|
if (typeof object[key] == 'undefined') {
|
|
object[key] = source[key];
|
|
}
|
|
}
|
|
}
|
|
return object;
|
|
}
|
|
|
|
/**
|
|
* Creates an array of function property names from all enumerable properties,
|
|
* own and inherited, of `object`.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @alias methods
|
|
* @category Object
|
|
* @param {Object} object The object to inspect.
|
|
* @returns {Array} Returns the new array of property names.
|
|
* @example
|
|
*
|
|
* _.functions(_);
|
|
* // => ['all', 'any', 'bind', ...]
|
|
*/
|
|
function functions(object) {
|
|
return baseFunctions(object, keysIn(object));
|
|
}
|
|
|
|
/**
|
|
* Checks if the specified property name exists as a direct property of `object`,
|
|
* instead of an inherited property.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Object
|
|
* @param {Object} object The object to inspect.
|
|
* @param {string} key The name of the property to check.
|
|
* @returns {boolean} Returns `true` if key is a direct property, else `false`.
|
|
* @example
|
|
*
|
|
* _.has({ 'a': 1, 'b': 2, 'c': 3 }, 'b');
|
|
* // => true
|
|
*/
|
|
function has(object, key) {
|
|
return object ? hasOwnProperty.call(object, key) : false;
|
|
}
|
|
|
|
/**
|
|
* Creates an object composed of the inverted keys and values of the given
|
|
* object. If the given object contains duplicate values, subsequent values
|
|
* overwrite property assignments of previous values unless `multiValue`
|
|
* is `true`.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Object
|
|
* @param {Object} object The object to invert.
|
|
* @param {boolean} [multiValue=false] Allow multiple values per key.
|
|
* @param- {Object} [guard] Enables use as a callback for functions like `_.map`.
|
|
* @returns {Object} Returns the new inverted object.
|
|
* @example
|
|
*
|
|
* _.invert({ 'first': 'fred', 'second': 'barney' });
|
|
* // => { 'fred': 'first', 'barney': 'second' }
|
|
*
|
|
* // without `multiValue`
|
|
* _.invert({ 'first': 'fred', 'second': 'barney', 'third': 'fred' });
|
|
* // => { 'fred': 'third', 'barney': 'second' }
|
|
*
|
|
* // with `multiValue`
|
|
* _.invert({ 'first': 'fred', 'second': 'barney', 'third': 'fred' }, true);
|
|
* // => { 'fred': ['first', 'third'], 'barney': ['second'] }
|
|
*/
|
|
function invert(object) {
|
|
var index = -1,
|
|
props = keys(object),
|
|
length = props.length,
|
|
result = {};
|
|
|
|
while (++index < length) {
|
|
var key = props[index];
|
|
result[object[key]] = key;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* Creates an array of the own enumerable property names of `object`.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Object
|
|
* @param {Object} object The object to inspect.
|
|
* @returns {Array} Returns the array of property names.
|
|
* @example
|
|
*
|
|
* function Shape() {
|
|
* this.x = 0;
|
|
* this.y = 0;
|
|
* }
|
|
*
|
|
* Shape.prototype.z = 0;
|
|
*
|
|
* _.keys(new Shape);
|
|
* // => ['x', 'y'] (iteration order is not guaranteed)
|
|
*/
|
|
var keys = !nativeKeys ? shimKeys : function(object) {
|
|
return isObject(object) ? nativeKeys(object) : [];
|
|
};
|
|
|
|
/**
|
|
* Creates an array of the own and inherited enumerable property names of `object`.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Object
|
|
* @param {Object} object The object to inspect.
|
|
* @returns {Array} Returns the array of property names.
|
|
* @example
|
|
*
|
|
* function Shape() {
|
|
* this.x = 0;
|
|
* this.y = 0;
|
|
* }
|
|
*
|
|
* Shape.prototype.z = 0;
|
|
*
|
|
* _.keysIn(new Shape);
|
|
* // => ['x', 'y', 'z'] (iteration order is not guaranteed)
|
|
*/
|
|
function keysIn(object) {
|
|
var result = [];
|
|
if (!isObject(object)) {
|
|
return result;
|
|
}
|
|
for (var key in object) {
|
|
result.push(key);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* Creates a shallow clone of `object` excluding the specified properties.
|
|
* Property names may be specified as individual arguments or as arrays of
|
|
* property names. If `predicate` is provided it is invoked for each property
|
|
* of `object` omitting the properties `predicate` returns truthy for. The
|
|
* predicate is bound to `thisArg` and invoked with three arguments;
|
|
* (value, key, object).
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Object
|
|
* @param {Object} object The source object.
|
|
* @param {Function|...(string|string[])} [predicate] The function invoked per
|
|
* iteration or property names to omit, specified as individual property
|
|
* names or arrays of property names.
|
|
* @param {*} [thisArg] The `this` binding of `predicate`.
|
|
* @returns {Object} Returns the new object.
|
|
* @example
|
|
*
|
|
* _.omit({ 'user': 'fred', 'age': 40 }, 'age');
|
|
* // => { 'user': 'fred' }
|
|
*
|
|
* _.omit({ 'user': 'fred', 'age': 40 }, function(value) {
|
|
* return typeof value == 'number';
|
|
* });
|
|
* // => { 'user': 'fred' }
|
|
*/
|
|
function omit(object, predicate, thisArg) {
|
|
if (object == null) {
|
|
return {};
|
|
}
|
|
if (typeof predicate != 'function') {
|
|
var props = arrayMap(baseFlatten(arguments, false, false, 1), String);
|
|
return pickByArray(object, baseDifference(keysIn(object), props));
|
|
}
|
|
predicate = baseCallback(predicate, thisArg, 3);
|
|
return pickByCallback(object, function(value, key, object) {
|
|
return !predicate(value, key, object);
|
|
});
|
|
}
|
|
|
|
/**
|
|
* Creates a two dimensional array of a given object's key-value pairs,
|
|
* e.g. `[[key1, value1], [key2, value2]]`.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Object
|
|
* @param {Object} object The object to inspect.
|
|
* @returns {Array} Returns the new array of key-value pairs.
|
|
* @example
|
|
*
|
|
* _.pairs({ 'barney': 36, 'fred': 40 });
|
|
* // => [['barney', 36], ['fred', 40]] (iteration order is not guaranteed)
|
|
*/
|
|
function pairs(object) {
|
|
var index = -1,
|
|
props = keys(object),
|
|
length = props.length,
|
|
result = Array(length);
|
|
|
|
while (++index < length) {
|
|
var key = props[index];
|
|
result[index] = [key, object[key]];
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* Creates a shallow clone of `object` composed of the specified properties.
|
|
* Property names may be specified as individual arguments or as arrays of
|
|
* property names. If `predicate` is provided it is invoked for each property
|
|
* of `object` picking the properties `predicate` returns truthy for. The
|
|
* predicate is bound to `thisArg` and invoked with three arguments;
|
|
* (value, key, object).
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Object
|
|
* @param {Object} object The source object.
|
|
* @param {Function|...(string|string[])} [predicate] The function invoked per
|
|
* iteration or property names to pick, specified as individual property
|
|
* names or arrays of property names.
|
|
* @param {*} [thisArg] The `this` binding of `predicate`.
|
|
* @returns {Object} Returns the new object.
|
|
* @example
|
|
*
|
|
* _.pick({ 'user': 'fred', '_userid': 'fred1' }, 'user');
|
|
* // => { 'user': 'fred' }
|
|
*
|
|
* _.pick({ 'user': 'fred', '_userid': 'fred1' }, function(value, key) {
|
|
* return key.charAt(0) != '_';
|
|
* });
|
|
* // => { 'user': 'fred' }
|
|
*/
|
|
function pick(object, predicate, thisArg) {
|
|
if (object == null) {
|
|
return {};
|
|
}
|
|
return typeof predicate == 'function'
|
|
? pickByCallback(object, baseCallback(predicate, thisArg, 3))
|
|
: pickByArray(object, baseFlatten(arguments, false, false, 1));
|
|
}
|
|
|
|
/**
|
|
* Creates an array of the own enumerable property values of `object`.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Object
|
|
* @param {Object} object The object to inspect.
|
|
* @returns {Array} Returns the array of property values.
|
|
* @example
|
|
*
|
|
* function Shape(x, y) {
|
|
* this.x = x;
|
|
* this.y = y;
|
|
* }
|
|
*
|
|
* Shape.prototype.z = 0;
|
|
*
|
|
* _.values(new Shape(2, 1));
|
|
* // => [2, 1] (iteration order is not guaranteed)
|
|
*/
|
|
function values(object) {
|
|
return baseValues(object, keys);
|
|
}
|
|
|
|
/*------------------------------------------------------------------------*/
|
|
|
|
/**
|
|
* Converts the characters "&", "<", ">", '"', "'", and '`', in `string` to
|
|
* their corresponding HTML entities.
|
|
*
|
|
* **Note:** No other characters are escaped. To escape additional characters
|
|
* use a third-party library like [_he_](http://mths.be/he).
|
|
*
|
|
* When working with HTML you should always quote attribute values to reduce
|
|
* XSS vectors. See [Ryan Grove's article](http://wonko.com/post/html-escaping)
|
|
* for more details.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category String
|
|
* @param {string} [string=''] The string to escape.
|
|
* @returns {string} Returns the escaped string.
|
|
* @example
|
|
*
|
|
* _.escape('fred, barney, & pebbles');
|
|
* // => 'fred, barney, & pebbles'
|
|
*/
|
|
function escape(string) {
|
|
// reset `lastIndex` because in IE < 9 `String#replace` does not
|
|
string = string == null ? '' : String(string);
|
|
return string && (reUnescapedHtml.lastIndex = 0, reUnescapedHtml.test(string))
|
|
? string.replace(reUnescapedHtml, escapeHtmlChar)
|
|
: string;
|
|
}
|
|
|
|
/**
|
|
* Escapes the `RegExp` special characters "\", "^", "$", ".", "|", "?", "*",
|
|
* "+", "(", ")", "[", "]", "{" and "}" in `string`.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category String
|
|
* @param {string} [string=''] The string to escape.
|
|
* @returns {string} Returns the escaped string.
|
|
* @example
|
|
*
|
|
* _.escapeRegExp('[lodash](http://lodash.com/)');
|
|
* // => '\[lodash\]\(http://lodash\.com/\)'
|
|
*/
|
|
function escapeRegExp(string) {
|
|
string = string == null ? '' : String(string);
|
|
return string && (reRegExpChars.lastIndex = 0, reRegExpChars.test(string))
|
|
? string.replace(reRegExpChars, '\\$&')
|
|
: string;
|
|
}
|
|
|
|
/**
|
|
* Creates a compiled template function that can interpolate data properties
|
|
* in "interpolate" delimiters, HTML-escape interpolated data properties in
|
|
* "escape" delimiters, and execute JavaScript in "evaluate" delimiters. Data
|
|
* properties may be accessed as free variables in the template. If a setting
|
|
* object is provided it overrides `_.templateSettings` for the template.
|
|
*
|
|
* **Note:** In the development build `_.template` utilizes sourceURLs for easier debugging.
|
|
* See the [HTML5 Rocks article on sourcemaps](http://www.html5rocks.com/en/tutorials/developertools/sourcemaps/#toc-sourceurl)
|
|
* for more details.
|
|
*
|
|
* For more information on precompiling templates see
|
|
* [Lo-Dash's custom builds documentation](http://lodash.com/custom-builds).
|
|
*
|
|
* For more information on Chrome extension sandboxes see
|
|
* [Chrome's extensions documentation](http://developer.chrome.com/stable/extensions/sandboxingEval.html).
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category String
|
|
* @param {string} [string=''] The template string.
|
|
* @param {Object} [options] The options object.
|
|
* @param {RegExp} [options.escape] The HTML "escape" delimiter.
|
|
* @param {RegExp} [options.evaluate] The "evaluate" delimiter.
|
|
* @param {Object} [options.imports] An object to import into the template as free variables.
|
|
* @param {RegExp} [options.interpolate] The "interpolate" delimiter.
|
|
* @param {string} [options.sourceURL] The sourceURL of the template's compiled source.
|
|
* @param {string} [options.variable] The data object variable name.
|
|
* @param- {Object} [otherOptions] Enables the legacy `options` param signature.
|
|
* @returns {Function} Returns the compiled template function.
|
|
* @example
|
|
*
|
|
* // using the "interpolate" delimiter to create a compiled template
|
|
* var compiled = _.template('hello <%= user %>!');
|
|
* compiled({ 'user': 'fred' });
|
|
* // => 'hello fred!'
|
|
*
|
|
* // using the HTML "escape" delimiter to escape data property values
|
|
* var compiled = _.template('<b><%- value %></b>');
|
|
* compiled({ 'value': '<script>' });
|
|
* // => '<b><script></b>'
|
|
*
|
|
* // using the "evaluate" delimiter to execute JavaScript and generate HTML
|
|
* var compiled = _.template('<% _.forEach(users, function(user) { %><li><%- user %></li><% }); %>');
|
|
* compiled({ 'users': ['fred', 'barney'] });
|
|
* // => '<li>fred</li><li>barney</li>'
|
|
*
|
|
* // using the internal `print` function in "evaluate" delimiters
|
|
* var compiled = _.template('<% print("hello " + user); %>!');
|
|
* compiled({ 'user': 'barney' });
|
|
* // => 'hello barney!'
|
|
*
|
|
* // using the ES6 delimiter as an alternative to the default "interpolate" delimiter
|
|
* var compiled = _.template('hello ${ user }!');
|
|
* compiled({ 'user': 'pebbles' });
|
|
* // => 'hello pebbles!'
|
|
*
|
|
* // using custom template delimiters
|
|
* _.templateSettings.interpolate = /{{([\s\S]+?)}}/g;
|
|
* var compiled = _.template('hello {{ user }}!');
|
|
* compiled({ 'user': 'mustache' });
|
|
* // => 'hello mustache!'
|
|
*
|
|
* // using backslashes to treat delimiters as plain text
|
|
* var compiled = _.template('<%= "\\<%- value %\\>" %>');
|
|
* compiled({ 'value': 'ignored' });
|
|
* // => '<%- value %>'
|
|
*
|
|
* // using the `imports` option to import `jQuery` as `jq`
|
|
* var text = '<% jq.each(users, function(user) { %><li><%- user %></li><% }); %>';
|
|
* var compiled = _.template(text, { 'imports': { 'jq': jQuery } });
|
|
* compiled({ 'users': ['fred', 'barney'] });
|
|
* // => '<li>fred</li><li>barney</li>'
|
|
*
|
|
* // using the `sourceURL` option to specify a custom sourceURL for the template
|
|
* var compiled = _.template('hello <%= user %>!', { 'sourceURL': '/basic/greeting.jst' });
|
|
* compiled(data);
|
|
* // => find the source of "greeting.jst" under the Sources tab or Resources panel of the web inspector
|
|
*
|
|
* // using the `variable` option to ensure a with-statement isn't used in the compiled template
|
|
* var compiled = _.template('hi <%= data.user %>!', { 'variable': 'data' });
|
|
* compiled.source;
|
|
* // => function(data) {
|
|
* var __t, __p = '';
|
|
* __p += 'hi ' + ((__t = ( data.user )) == null ? '' : __t) + '!';
|
|
* return __p;
|
|
* }
|
|
*
|
|
* // using the `source` property to inline compiled templates for meaningful
|
|
* // line numbers in error messages and a stack trace
|
|
* fs.writeFileSync(path.join(cwd, 'jst.js'), '\
|
|
* var JST = {\
|
|
* "main": ' + _.template(mainText).source + '\
|
|
* };\
|
|
* ');
|
|
*/
|
|
function template(string, options, otherOptions) {
|
|
var _ = lodash,
|
|
settings = _.templateSettings;
|
|
|
|
if (isIterateeCall(string, options, otherOptions)) {
|
|
options = otherOptions = null;
|
|
}
|
|
string = String(string == null ? '' : string);
|
|
options = defaults({}, otherOptions || options, settings);
|
|
|
|
var index = 0,
|
|
source = "__p += '",
|
|
variable = options.variable;
|
|
|
|
var reDelimiters = RegExp(
|
|
(options.escape || reNoMatch).source + '|' +
|
|
(options.interpolate || reNoMatch).source + '|' +
|
|
(options.evaluate || reNoMatch).source + '|$'
|
|
, 'g');
|
|
|
|
string.replace(reDelimiters, function(match, escapeValue, interpolateValue, evaluateValue, offset) {
|
|
source += string.slice(index, offset).replace(reUnescapedString, escapeStringChar);
|
|
if (escapeValue) {
|
|
source += "' +\n_.escape(" + escapeValue + ") +\n'";
|
|
}
|
|
if (evaluateValue) {
|
|
source += "';\n" + evaluateValue + ";\n__p += '";
|
|
}
|
|
if (interpolateValue) {
|
|
source += "' +\n((__t = (" + interpolateValue + ")) == null ? '' : __t) +\n'";
|
|
}
|
|
index = offset + match.length;
|
|
return match;
|
|
});
|
|
|
|
source += "';\n";
|
|
if (!variable) {
|
|
source = 'with (obj || {}) {\n' + source + '\n}\n';
|
|
}
|
|
source = 'function(' + (variable || 'obj') + ') {\n' +
|
|
"var __t, __p = '', __j = Array.prototype.join;\n" +
|
|
"function print() { __p += __j.call(arguments, '') }\n" +
|
|
source +
|
|
'return __p\n}';
|
|
|
|
var result = attempt(function() {
|
|
return Function('_', 'return ' + source)(_);
|
|
});
|
|
|
|
result.source = source;
|
|
if (isError(result)) {
|
|
throw result;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* The inverse of `_.escape`; this method converts the HTML entities
|
|
* `&`, `<`, `>`, `"`, `'`, and ``` in `string` to their
|
|
* corresponding characters.
|
|
*
|
|
* **Note:** No other HTML entities are unescaped. To unescape additional HTML
|
|
* entities use a third-party library like [_he_](http://mths.be/he).
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category String
|
|
* @param {string} [string=''] The string to unescape.
|
|
* @returns {string} Returns the unescaped string.
|
|
* @example
|
|
*
|
|
* _.unescape('fred, barney, & pebbles');
|
|
* // => 'fred, barney, & pebbles'
|
|
*/
|
|
function unescape(string) {
|
|
string = string == null ? '' : String(string);
|
|
return string && (reEscapedHtml.lastIndex = 0, reEscapedHtml.test(string))
|
|
? string.replace(reEscapedHtml, unescapeHtmlChar)
|
|
: string;
|
|
}
|
|
|
|
/*------------------------------------------------------------------------*/
|
|
|
|
/**
|
|
* Attempts to invoke `func`, returning either the result or the caught
|
|
* error object.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Utility
|
|
* @param {*} func The function to attempt.
|
|
* @returns {*} Returns the `func` result or error object.
|
|
* @example
|
|
*
|
|
* // avoid throwing errors for invalid selectors
|
|
* var elements = _.attempt(function() {
|
|
* return document.querySelectorAll(selector);
|
|
* });
|
|
*
|
|
* if (_.isError(elements)) {
|
|
* elements = [];
|
|
* }
|
|
*/
|
|
function attempt(func) {
|
|
try {
|
|
return func();
|
|
} catch(e) {
|
|
return isError(e) ? e : Error(e);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Creates a function bound to an optional `thisArg`. If `func` is a property
|
|
* name the created callback returns the property value for a given element.
|
|
* If `func` is an object the created callback returns `true` for elements
|
|
* that contain the equivalent object properties, otherwise it returns `false`.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @alias iteratee
|
|
* @category Utility
|
|
* @param {*} [func=identity] The value to convert to a callback.
|
|
* @param {*} [thisArg] The `this` binding of the created callback.
|
|
* @param- {Object} [guard] Enables use as a callback for functions like `_.map`.
|
|
* @returns {Function} Returns the new function.
|
|
* @example
|
|
*
|
|
* var users = [
|
|
* { 'user': 'barney', 'age': 36 },
|
|
* { 'user': 'fred', 'age': 40 }
|
|
* ];
|
|
*
|
|
* // wrap to create custom callback shorthands
|
|
* _.callback = _.wrap(_.callback, function(callback, func, thisArg) {
|
|
* var match = /^(.+?)__([gl]t)(.+)$/.exec(func);
|
|
* if (!match) {
|
|
* return callback(func, thisArg);
|
|
* }
|
|
* return function(object) {
|
|
* return match[2] == 'gt' ? object[match[1]] > match[3] : object[match[1]] < match[3];
|
|
* };
|
|
* });
|
|
*
|
|
* _.filter(users, 'age__gt38');
|
|
* // => [{ 'user': 'fred', 'age': 40 }]
|
|
*/
|
|
function callback(func, thisArg, guard) {
|
|
return baseCallback(func, guard ? undefined : thisArg);
|
|
}
|
|
|
|
/**
|
|
* Creates a function that returns `value`.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Utility
|
|
* @param {*} value The value to return from the new function.
|
|
* @returns {Function} Returns the new function.
|
|
* @example
|
|
*
|
|
* var object = { 'user': 'fred' };
|
|
* var getter = _.constant(object);
|
|
* getter() === object;
|
|
* // => true
|
|
*/
|
|
function constant(value) {
|
|
return function() {
|
|
return value;
|
|
};
|
|
}
|
|
|
|
/**
|
|
* This method returns the first argument provided to it.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Utility
|
|
* @param {*} value Any value.
|
|
* @returns {*} Returns `value`.
|
|
* @example
|
|
*
|
|
* var object = { 'user': 'fred' };
|
|
* _.identity(object) === object;
|
|
* // => true
|
|
*/
|
|
function identity(value) {
|
|
return value;
|
|
}
|
|
|
|
/**
|
|
* Creates a "_.where" style predicate function which performs a deep comparison
|
|
* between a given object and the `source` object, returning `true` if the given
|
|
* object has equivalent property values, else `false`.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Utility
|
|
* @param {Object} source The object of property values to match.
|
|
* @returns {Function} Returns the new function.
|
|
* @example
|
|
*
|
|
* var users = [
|
|
* { 'user': 'fred', 'age': 40 },
|
|
* { 'user': 'barney', 'age': 36 }
|
|
* ];
|
|
*
|
|
* var matchesAge = _.matches({ 'age': 36 });
|
|
*
|
|
* _.filter(users, matchesAge);
|
|
* // => [{ 'user': 'barney', 'age': 36 }]
|
|
*
|
|
* _.find(users, matchesAge);
|
|
* // => { 'user': 'barney', 'age': 36 }
|
|
*/
|
|
function matches(source) {
|
|
var keyVals = pairs(source),
|
|
length = keyVals.length;
|
|
|
|
return function(object) {
|
|
var index = length;
|
|
if (object == null) {
|
|
return !index;
|
|
}
|
|
while (index--) {
|
|
var keyVal = keyVals[index];
|
|
if (object[keyVal[0]] !== keyVal[1]) {
|
|
return false
|
|
}
|
|
}
|
|
index = length;
|
|
while (index--) {
|
|
if (!hasOwnProperty.call(object, keyVals[index][0])) {
|
|
return false
|
|
}
|
|
}
|
|
return true;
|
|
};
|
|
}
|
|
|
|
/**
|
|
* Adds all own enumerable function properties of a source object to the
|
|
* destination object. If `object` is a function then methods are added to
|
|
* its prototype as well.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Utility
|
|
* @param {Function|Object} [object=this] object The destination object.
|
|
* @param {Object} source The object of functions to add.
|
|
* @param {Object} [options] The options object.
|
|
* @param {boolean} [options.chain=true] Specify whether the functions added
|
|
* are chainable.
|
|
* @returns {Function|Object} Returns `object`.
|
|
* @example
|
|
*
|
|
* function vowels(string) {
|
|
* return _.filter(string, function(v) {
|
|
* return /[aeiou]/i.test(v);
|
|
* });
|
|
* }
|
|
*
|
|
* _.mixin({ 'vowels': vowels });
|
|
* _.vowels('fred');
|
|
* // => ['e']
|
|
*
|
|
* _('fred').vowels().value();
|
|
* // => ['e']
|
|
*
|
|
* _.mixin({ 'vowels': vowels }, { 'chain': false });
|
|
* _('fred').vowels();
|
|
* // => ['e']
|
|
*/
|
|
function mixin(source) {
|
|
var index = -1,
|
|
methodNames = functions(source),
|
|
length = methodNames.length;
|
|
|
|
while (++index < length) {
|
|
var methodName = methodNames[index];
|
|
lodash.prototype[methodName] = (function() {
|
|
var func = lodash[methodName] = source[methodName];
|
|
return function() {
|
|
var args = [this.__wrapped__];
|
|
push.apply(args, arguments);
|
|
|
|
var result = func.apply(lodash, args);
|
|
return this.__chain__ ? new lodashWrapper(result, true) : result;
|
|
};
|
|
}());
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Reverts the `_` variable to its previous value and returns a reference to
|
|
* the `lodash` function.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Utility
|
|
* @returns {Function} Returns the `lodash` function.
|
|
* @example
|
|
*
|
|
* var lodash = _.noConflict();
|
|
*/
|
|
function noConflict() {
|
|
root._ = oldDash;
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* A no-operation function.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Utility
|
|
* @example
|
|
*
|
|
* var object = { 'user': 'fred' };
|
|
* _.noop(object) === undefined;
|
|
* // => true
|
|
*/
|
|
function noop() {
|
|
// no operation performed
|
|
}
|
|
|
|
/**
|
|
* Gets the number of milliseconds that have elapsed since the Unix epoch
|
|
* (1 January 1970 00:00:00 UTC).
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Utility
|
|
* @example
|
|
*
|
|
* _.defer(function(stamp) { console.log(_.now() - stamp); }, _.now());
|
|
* // => logs the number of milliseconds it took for the deferred function to be invoked
|
|
*/
|
|
var now = nativeNow || function() {
|
|
return new Date().getTime();
|
|
};
|
|
|
|
/**
|
|
* Creates a "_.pluck" style function which returns the `key` value of a
|
|
* given object.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Utility
|
|
* @param {string} key The name of the property to retrieve.
|
|
* @returns {Function} Returns the new function.
|
|
* @example
|
|
*
|
|
* var users = [
|
|
* { 'user': 'fred', 'age': 40 },
|
|
* { 'user': 'barney', 'age': 36 }
|
|
* ];
|
|
*
|
|
* var getName = _.property('user');
|
|
*
|
|
* _.map(users, getName);
|
|
* // => ['barney', 'fred']
|
|
*
|
|
* _.sortBy(users, getName);
|
|
* // => [{ 'user': 'barney', 'age': 36 }, { 'user': 'fred', 'age': 40 }]
|
|
*/
|
|
function property(key) {
|
|
return function(object) {
|
|
return object == null ? undefined : object[key];
|
|
};
|
|
}
|
|
|
|
/**
|
|
* Produces a random number between `min` and `max` (inclusive). If only one
|
|
* argument is provided a number between `0` and the given number is returned.
|
|
* If `floating` is `true`, or either `min` or `max` are floats, a floating-point
|
|
* number is returned instead of an integer.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Utility
|
|
* @param {number} [min=0] The minimum possible value.
|
|
* @param {number} [max=1] The maximum possible value.
|
|
* @param {boolean} [floating=false] Specify returning a floating-point number.
|
|
* @returns {number} Returns the random number.
|
|
* @example
|
|
*
|
|
* _.random(0, 5);
|
|
* // => an integer between 0 and 5
|
|
*
|
|
* _.random(5);
|
|
* // => also an integer between 0 and 5
|
|
*
|
|
* _.random(5, true);
|
|
* // => a floating-point number between 0 and 5
|
|
*
|
|
* _.random(1.2, 5.2);
|
|
* // => a floating-point number between 1.2 and 5.2
|
|
*/
|
|
function random(min, max, guard) {
|
|
max = guard ? null : max;
|
|
if (min == null && max == null) {
|
|
max = 1;
|
|
}
|
|
min = +min || 0;
|
|
if (max == null) {
|
|
max = min;
|
|
min = 0;
|
|
} else {
|
|
max = +max || 0;
|
|
}
|
|
return min + floor(nativeRandom() * (max - min + 1));
|
|
}
|
|
|
|
/**
|
|
* Creates an array of numbers (positive and/or negative) progressing from
|
|
* `start` up to but not including `end`. If `start` is less than `stop` a
|
|
* zero-length range is created unless a negative `step` is specified.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Utility
|
|
* @param {number} [start=0] The start of the range.
|
|
* @param {number} end The end of the range.
|
|
* @param {number} [step=1] The value to increment or decrement by.
|
|
* @returns {Array} Returns the new array of numbers.
|
|
* @example
|
|
*
|
|
* _.range(4);
|
|
* // => [0, 1, 2, 3]
|
|
*
|
|
* _.range(1, 5);
|
|
* // => [1, 2, 3, 4]
|
|
*
|
|
* _.range(0, 20, 5);
|
|
* // => [0, 5, 10, 15]
|
|
*
|
|
* _.range(0, -4, -1);
|
|
* // => [0, -1, -2, -3]
|
|
*
|
|
* _.range(1, 4, 0);
|
|
* // => [1, 1, 1]
|
|
*
|
|
* _.range(0);
|
|
* // => []
|
|
*/
|
|
function range(start, end, step) {
|
|
if (step && isIterateeCall(start, end, step)) {
|
|
end = step = null;
|
|
}
|
|
start = +start || 0;
|
|
step = +step || 1;
|
|
|
|
if (end == null) {
|
|
end = start;
|
|
start = 0;
|
|
} else {
|
|
end = +end || 0;
|
|
}
|
|
// use `Array(length)` so engines like Chakra and V8 avoid slower modes
|
|
// http://youtu.be/XAqIpGU8ZZk#t=17m25s
|
|
var index = -1,
|
|
length = nativeMax(ceil((end - start) / (step || 1)), 0),
|
|
result = Array(length);
|
|
|
|
while (++index < length) {
|
|
result[index] = start;
|
|
start += step;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* Resolves the value of property `key` on `object`. If `key` is a function
|
|
* it is invoked with the `this` binding of `object` and its result returned,
|
|
* else the property value is returned. If `object` is `null` or `undefined`
|
|
* then `undefined` is returned. If a default value is provided it is returned
|
|
* if the property value resolves to `undefined`.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Utility
|
|
* @param {Object} object The object to inspect.
|
|
* @param {string} key The name of the property to resolve.
|
|
* @param {*} [defaultValue] The value returned if the property value
|
|
* resolves to `undefined`.
|
|
* @returns {*} Returns the resolved value.
|
|
* @example
|
|
*
|
|
* var object = {
|
|
* 'user': 'fred',
|
|
* 'age': function() {
|
|
* return 40;
|
|
* }
|
|
* };
|
|
*
|
|
* _.result(object, 'user');
|
|
* // => 'fred'
|
|
*
|
|
* _.result(object, 'age');
|
|
* // => 40
|
|
*
|
|
* _.result(object, 'employer', 'slate');
|
|
* // => 'slate'
|
|
*/
|
|
function result(object, key) {
|
|
if (object != null) {
|
|
var value = object[key];
|
|
return isFunction(value) ? object[key]() : value;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Invokes the iteratee function `n` times, returning an array of the results
|
|
* of each invocation. The `iteratee` is bound to `thisArg` and invoked with
|
|
* one argument; (index).
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Utility
|
|
* @param {number} n The number of times to invoke `iteratee`.
|
|
* @param {Function} [iteratee=identity] The function invoked per iteration.
|
|
* @param {*} [thisArg] The `this` binding of `iteratee`.
|
|
* @returns {Array} Returns the array of results.
|
|
* @example
|
|
*
|
|
* var diceRolls = _.times(3, _.partial(_.random, 1, 6, false));
|
|
* // => [3, 6, 4]
|
|
*
|
|
* _.times(3, function(n) { mage.castSpell(n); });
|
|
* // => invokes `mage.castSpell(n)` three times, passing `n` of `0`, `1`, and `2` respectively
|
|
*
|
|
* _.times(3, function(n) { this.cast(n); }, mage);
|
|
* // => also invokes `mage.castSpell(n)` three times
|
|
*/
|
|
function times(n, iteratee, thisArg) {
|
|
n = nativeIsFinite(n = +n) && n > -1 ? n : 0;
|
|
iteratee = baseCallback(iteratee, thisArg, 1);
|
|
|
|
var index = -1,
|
|
result = Array(nativeMin(n, MAX_ARRAY_LENGTH));
|
|
|
|
while (++index < n) {
|
|
if (index < MAX_ARRAY_LENGTH) {
|
|
result[index] = iteratee(index);
|
|
} else {
|
|
iteratee(index);
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* Generates a unique ID. If `prefix` is provided the ID is appended to it.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Utility
|
|
* @param {string} [prefix] The value to prefix the ID with.
|
|
* @returns {string} Returns the unique ID.
|
|
* @example
|
|
*
|
|
* _.uniqueId('contact_');
|
|
* // => 'contact_104'
|
|
*
|
|
* _.uniqueId();
|
|
* // => '105'
|
|
*/
|
|
function uniqueId(prefix) {
|
|
var id = ++idCounter + '';
|
|
return prefix ? prefix + id : id;
|
|
}
|
|
|
|
/*------------------------------------------------------------------------*/
|
|
|
|
// add functions that return wrapped values when chaining
|
|
lodash.after = after;
|
|
lodash.before = before;
|
|
lodash.bind = bind;
|
|
lodash.bindAll = bindAll;
|
|
lodash.chain = chain;
|
|
lodash.compact = compact;
|
|
lodash.constant = constant;
|
|
lodash.countBy = countBy;
|
|
lodash.debounce = debounce;
|
|
lodash.defaults = defaults;
|
|
lodash.defer = defer;
|
|
lodash.delay = delay;
|
|
lodash.difference = difference;
|
|
lodash.drop = drop;
|
|
lodash.filter = filter;
|
|
lodash.flatten = flatten;
|
|
lodash.forEach = forEach;
|
|
lodash.functions = functions;
|
|
lodash.groupBy = groupBy;
|
|
lodash.indexBy = indexBy;
|
|
lodash.initial = initial;
|
|
lodash.intersection = intersection;
|
|
lodash.invert = invert;
|
|
lodash.invoke = invoke;
|
|
lodash.keys = keys;
|
|
lodash.map = map;
|
|
lodash.matches = matches;
|
|
lodash.memoize = memoize;
|
|
lodash.mixin = mixin;
|
|
lodash.negate = negate;
|
|
lodash.omit = omit;
|
|
lodash.once = once;
|
|
lodash.pairs = pairs;
|
|
lodash.partial = partial;
|
|
lodash.partition = partition;
|
|
lodash.pick = pick;
|
|
lodash.pluck = pluck;
|
|
lodash.property = property;
|
|
lodash.range = range;
|
|
lodash.reject = reject;
|
|
lodash.rest = rest;
|
|
lodash.shuffle = shuffle;
|
|
lodash.sortBy = sortBy;
|
|
lodash.take = take;
|
|
lodash.tap = tap;
|
|
lodash.throttle = throttle;
|
|
lodash.times = times;
|
|
lodash.toArray = toArray;
|
|
lodash.union = union;
|
|
lodash.uniq = uniq;
|
|
lodash.values = values;
|
|
lodash.where = where;
|
|
lodash.without = without;
|
|
lodash.wrap = wrap;
|
|
lodash.zip = zip;
|
|
|
|
// add aliases
|
|
lodash.collect = map;
|
|
lodash.compose = flowRight;
|
|
lodash.each = forEach;
|
|
lodash.extend = assign;
|
|
lodash.iteratee = callback;
|
|
lodash.methods = functions;
|
|
lodash.object = zipObject;
|
|
lodash.select = filter;
|
|
lodash.tail = rest;
|
|
lodash.unique = uniq;
|
|
|
|
/*------------------------------------------------------------------------*/
|
|
|
|
// add functions that return unwrapped values when chaining
|
|
lodash.clone = clone;
|
|
lodash.contains = contains;
|
|
lodash.escape = escape;
|
|
lodash.every = every;
|
|
lodash.find = find;
|
|
lodash.findWhere = findWhere;
|
|
lodash.first = first;
|
|
lodash.has = has;
|
|
lodash.identity = identity;
|
|
lodash.indexOf = indexOf;
|
|
lodash.isArguments = isArguments;
|
|
lodash.isArray = isArray;
|
|
lodash.isBoolean = isBoolean;
|
|
lodash.isDate = isDate;
|
|
lodash.isElement = isElement;
|
|
lodash.isEmpty = isEmpty;
|
|
lodash.isEqual = isEqual;
|
|
lodash.isFinite = isFinite;
|
|
lodash.isFunction = isFunction;
|
|
lodash.isNaN = isNaN;
|
|
lodash.isNull = isNull;
|
|
lodash.isNumber = isNumber;
|
|
lodash.isObject = isObject;
|
|
lodash.isRegExp = isRegExp;
|
|
lodash.isString = isString;
|
|
lodash.isUndefined = isUndefined;
|
|
lodash.last = last;
|
|
lodash.lastIndexOf = lastIndexOf;
|
|
lodash.max = max;
|
|
lodash.min = min;
|
|
lodash.noConflict = noConflict;
|
|
lodash.noop = noop;
|
|
lodash.now = now;
|
|
lodash.random = random;
|
|
lodash.reduce = reduce;
|
|
lodash.reduceRight = reduceRight;
|
|
lodash.result = result;
|
|
lodash.size = size;
|
|
lodash.some = some;
|
|
lodash.sortedIndex = sortedIndex;
|
|
lodash.template = template;
|
|
lodash.unescape = unescape;
|
|
lodash.uniqueId = uniqueId;
|
|
|
|
// add aliases
|
|
lodash.all = every;
|
|
lodash.any = some;
|
|
lodash.detect = find;
|
|
lodash.foldl = reduce;
|
|
lodash.foldr = reduceRight;
|
|
lodash.head = first;
|
|
lodash.include = contains;
|
|
lodash.inject = reduce;
|
|
|
|
/*------------------------------------------------------------------------*/
|
|
|
|
// add functions capable of returning wrapped and unwrapped values when chaining
|
|
lodash.sample = sample;
|
|
|
|
/*------------------------------------------------------------------------*/
|
|
|
|
// add functions to `lodash.prototype`
|
|
mixin(assign({}, lodash));
|
|
|
|
/**
|
|
* The semantic version number.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @type string
|
|
*/
|
|
lodash.VERSION = VERSION;
|
|
|
|
// ensure `new lodashWrapper` is an instance of `lodash`
|
|
lodashWrapper.prototype = lodash.prototype;
|
|
|
|
// add "Chaining" functions to the wrapper
|
|
lodash.prototype.chain = wrapperChain;
|
|
lodash.prototype.value = wrapperValueOf;
|
|
|
|
// assign default placeholders
|
|
partial.placeholder = lodash;
|
|
|
|
// add `Array.prototype` functions
|
|
arrayEach(['concat', 'join', 'pop', 'push', 'reverse', 'shift', 'sort', 'splice', 'unshift'], function(methodName) {
|
|
var func = arrayProto[methodName],
|
|
retValue = !/^(?:concat|join|slice)$/.test(methodName),
|
|
fixObjects = !support.spliceObjects && /^(?:pop|shift|splice)$/.test(methodName);
|
|
|
|
lodash.prototype[methodName] = function() {
|
|
var value = this.__wrapped__,
|
|
result = func.apply(value, arguments);
|
|
|
|
// avoid array-like object bugs with `Array#shift` and `Array#splice` in
|
|
// IE < 9, Firefox < 10, and RingoJS
|
|
if (fixObjects && value.length === 0) {
|
|
delete value[0];
|
|
}
|
|
if (retValue) {
|
|
result = value;
|
|
}
|
|
return this.__chain__ ? new lodashWrapper(result, true) : result;
|
|
};
|
|
});
|
|
|
|
/*--------------------------------------------------------------------------*/
|
|
|
|
// some AMD build optimizers like r.js check for condition patterns like the following:
|
|
if (typeof define == 'function' && typeof define.amd == 'object' && define.amd) {
|
|
// Expose Lo-Dash to the global object when an AMD loader is present to avoid
|
|
// errors in cases where Lo-Dash is loaded by a script tag and not intended
|
|
// as an AMD module. See http://requirejs.org/docs/errors.html#mismatch
|
|
root._ = lodash;
|
|
|
|
// define as an anonymous module so, through path mapping, it can be
|
|
// referenced as the "underscore" module
|
|
define('underscore', function() {
|
|
return lodash;
|
|
});
|
|
}
|
|
// check for `exports` after `define` in case a build optimizer adds an `exports` object
|
|
else if (freeExports && freeModule) {
|
|
// in Node.js or RingoJS
|
|
if (moduleExports) {
|
|
(freeModule.exports = lodash)._ = lodash;
|
|
}
|
|
// in Narwhal or Rhino -require
|
|
else {
|
|
freeExports._ = lodash;
|
|
}
|
|
}
|
|
else {
|
|
// in a browser or Rhino
|
|
root._ = lodash;
|
|
}
|
|
}.call(this));
|