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- /**
- * lodash 3.2.0 (Custom Build) <https://lodash.com/>
- * Build: `lodash modern modularize exports="npm" -o ./`
- * Copyright 2012-2015 The Dojo Foundation <http://dojofoundation.org/>
- * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
- * Copyright 2009-2015 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
- * Available under MIT license <https://lodash.com/license>
- */
- var baseAssign = require('lodash._baseassign'),
- createAssigner = require('lodash._createassigner'),
- keys = require('lodash.keys');
-
- /**
- * A specialized version of `_.assign` for customizing assigned values without
- * support for argument juggling, multiple sources, and `this` binding `customizer`
- * functions.
- *
- * @private
- * @param {Object} object The destination object.
- * @param {Object} source The source object.
- * @param {Function} customizer The function to customize assigned values.
- * @returns {Object} Returns `object`.
- */
- function assignWith(object, source, customizer) {
- var index = -1,
- props = keys(source),
- length = props.length;
-
- while (++index < length) {
- var key = props[index],
- value = object[key],
- result = customizer(value, source[key], key, object, source);
-
- if ((result === result ? (result !== value) : (value === value)) ||
- (value === undefined && !(key in object))) {
- object[key] = result;
- }
- }
- return object;
- }
-
- /**
- * 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).
- *
- * **Note:** This method mutates `object` and is based on
- * [`Object.assign`](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-object.assign).
- *
- * @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 assigned values.
- * @param {*} [thisArg] The `this` binding of `customizer`.
- * @returns {Object} Returns `object`.
- * @example
- *
- * _.assign({ 'user': 'barney' }, { 'age': 40 }, { 'user': 'fred' });
- * // => { 'user': 'fred', 'age': 40 }
- *
- * // using a customizer callback
- * var defaults = _.partialRight(_.assign, function(value, other) {
- * return _.isUndefined(value) ? other : value;
- * });
- *
- * defaults({ 'user': 'barney' }, { 'age': 36 }, { 'user': 'fred' });
- * // => { 'user': 'barney', 'age': 36 }
- */
- var assign = createAssigner(function(object, source, customizer) {
- return customizer
- ? assignWith(object, source, customizer)
- : baseAssign(object, source);
- });
-
- module.exports = assign;
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