64 lines
2 KiB
JavaScript
64 lines
2 KiB
JavaScript
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/**
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* lodash 3.1.2 (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 assign = require('lodash.assign'),
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restParam = require('lodash.restparam');
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/**
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* Used by `_.defaults` to customize its `_.assign` use.
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*
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* @private
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* @param {*} objectValue The destination object property value.
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* @param {*} sourceValue The source object property value.
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* @returns {*} Returns the value to assign to the destination object.
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*/
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function assignDefaults(objectValue, sourceValue) {
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return objectValue === undefined ? sourceValue : objectValue;
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}
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/**
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* Creates a `_.defaults` or `_.defaultsDeep` function.
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*
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* @private
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* @param {Function} assigner The function to assign values.
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* @param {Function} customizer The function to customize assigned values.
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* @returns {Function} Returns the new defaults function.
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*/
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function createDefaults(assigner, customizer) {
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return restParam(function(args) {
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var object = args[0];
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if (object == null) {
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return object;
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}
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args.push(customizer);
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return assigner.apply(undefined, args);
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});
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}
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/**
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* Assigns own enumerable properties of source object(s) to the destination
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* object for all destination properties that resolve to `undefined`. Once a
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* property is set, additional values of the same property are ignored.
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*
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* **Note:** This method mutates `object`.
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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 destination object.
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* @param {...Object} [sources] The source objects.
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* @returns {Object} Returns `object`.
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* @example
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*
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* _.defaults({ 'user': 'barney' }, { 'age': 36 }, { 'user': 'fred' });
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* // => { 'user': 'barney', 'age': 36 }
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*/
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var defaults = createDefaults(assign, assignDefaults);
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module.exports = defaults;
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