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71 lines
2.2 KiB
JavaScript
71 lines
2.2 KiB
JavaScript
/**
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* lodash 3.8.0 (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 1.8.3 <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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* The opposite of `_.mapValues`; this method creates an object with the
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* same values as `object` and keys generated by running each own enumerable
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* property of `object` through `iteratee`.
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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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* _.mapKeys({ 'a': 1, 'b': 2 }, function(value, key) {
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* return key + value;
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* });
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* // => { 'a1': 1, 'b2': 2 }
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*/
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var mapKeys = createObjectMapper(true);
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module.exports = mapKeys;
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