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92 lines
3.0 KiB
JavaScript
92 lines
3.0 KiB
JavaScript
/**
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* lodash 3.0.1 (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 1.8.3 <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 baseCallback = require('lodash._basecallback'),
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baseFor = require('lodash._basefor'),
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keys = require('lodash.keys');
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/**
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* The base implementation of `_.forOwn` without support for callback
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* shorthands and `this` binding.
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*
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* @private
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* @param {Object} object The object to iterate over.
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* @param {Function} iteratee The function invoked per iteration.
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* @returns {Object} Returns `object`.
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*/
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function baseForOwn(object, iteratee) {
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return baseFor(object, iteratee, keys);
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}
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/**
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* Creates a function for `_.mapKeys` or `_.mapValues`.
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*
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* @private
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* @param {boolean} [isMapKeys] Specify mapping keys instead of values.
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* @returns {Function} Returns the new map function.
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*/
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function createObjectMapper(isMapKeys) {
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return function(object, iteratee, thisArg) {
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var result = {};
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iteratee = baseCallback(iteratee, thisArg, 3);
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baseForOwn(object, function(value, key, object) {
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var mapped = iteratee(value, key, object);
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key = isMapKeys ? mapped : key;
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value = isMapKeys ? value : mapped;
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result[key] = value;
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});
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return result;
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};
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}
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/**
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* Creates an object with the same keys as `object` and values generated by
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* running each own enumerable property of `object` through `iteratee`. The
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* iteratee function is bound to `thisArg` and invoked with three arguments:
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* (value, key, object).
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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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* @static
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* @memberOf _
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* @category Object
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* @param {Object} object The object 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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* @param {*} [thisArg] The `this` binding of `iteratee`.
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* @returns {Object} Returns the new mapped object.
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* @example
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*
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* _.mapValues({ 'a': 1, 'b': 2 }, function(n) {
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* return n * 3;
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* });
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* // => { 'a': 3, 'b': 6 }
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*
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* var users = {
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* 'fred': { 'user': 'fred', 'age': 40 },
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* 'pebbles': { 'user': 'pebbles', 'age': 1 }
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* };
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*
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* // using the `_.property` callback shorthand
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* _.mapValues(users, 'age');
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* // => { 'fred': 40, 'pebbles': 1 } (iteration order is not guaranteed)
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*/
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var mapValues = createObjectMapper();
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module.exports = mapValues;
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