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Bump to v3.0.0.
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lodash.map/index.js
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93
lodash.map/index.js
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/**
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* lodash 3.0.0 (Custom Build) <https://lodash.com/>
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* Build: `lodash modern modularize exports="npm" -o ./`
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* Copyright 2012-2015 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 2009-2015 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
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* Available under MIT license <https://lodash.com/license>
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*/
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var arrayMap = require('lodash._arraymap'),
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baseCallback = require('lodash._basecallback'),
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baseEach = require('lodash._baseeach'),
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isArray = require('lodash.isarray');
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/**
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* The base implementation of `_.map` without support for callback shorthands
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* and `this` binding.
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*
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* @private
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* @param {Array|Object|string} collection The collection 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 baseMap(collection, iteratee) {
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var result = [];
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baseEach(collection, function(value, key, collection) {
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result.push(iteratee(value, key, collection));
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});
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return result;
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}
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/**
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* Creates an array of values by running each element in `collection` through
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* `iteratee`. The `iteratee` is bound to `thisArg` and invoked with three
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* arguments: (value, index|key, collection).
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*
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* If a property name is provided for `iteratee` the created `_.property`
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* style callback returns the property value of the given element.
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*
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* If a value is also provided for `thisArg` the created `_.matchesProperty`
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* style callback returns `true` for elements that have a matching property
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* value, else `false`.
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*
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* If an object is provided for `iteratee` the created `_.matches` style
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* callback returns `true` for elements that have the properties of the given
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* object, else `false`.
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*
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* Many lodash methods are guarded to work as interatees for methods like
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* `_.every`, `_.filter`, `_.map`, `_.mapValues`, `_.reject`, and `_.some`.
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*
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* The guarded methods are:
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* `ary`, `callback`, `chunk`, `clone`, `create`, `curry`, `curryRight`, `drop`,
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* `dropRight`, `every`, `fill`, `flatten`, `invert`, `max`, `min`, `parseInt`,
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* `slice`, `sortBy`, `take`, `takeRight`, `template`, `trim`, `trimLeft`,
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* `trimRight`, `trunc`, `random`, `range`, `sample`, `some`, `uniq`, and `words`
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*
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* @static
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* @memberOf _
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* @alias collect
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* @category Collection
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* @param {Array|Object|string} collection The collection to iterate over.
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* @param {Function|Object|string} [iteratee=_.identity] The function invoked
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* per iteration.
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* create a `_.property` or `_.matches` style callback respectively.
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* @param {*} [thisArg] The `this` binding of `iteratee`.
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* @returns {Array} Returns the new mapped array.
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* @example
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*
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* function timesThree(n) {
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* return n * 3;
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* }
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*
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* _.map([1, 2], timesThree);
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* // => [3, 6]
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*
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* _.map({ 'a': 1, 'b': 2 }, timesThree);
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* // => [3, 6] (iteration order is not guaranteed)
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*
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* var users = [
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* { 'user': 'barney' },
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* { 'user': 'fred' }
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* ];
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*
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* // using the `_.property` callback shorthand
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* _.map(users, 'user');
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* // => ['barney', 'fred']
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*/
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function map(collection, iteratee, thisArg) {
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var func = isArray(collection) ? arrayMap : baseMap;
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iteratee = baseCallback(iteratee, thisArg, 3);
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return func(collection, iteratee);
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}
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module.exports = map;
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