2016-09-17 22:24:52 -07:00
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define(['./_assignValue', './_baseAssignValue'], function(assignValue, baseAssignValue) {
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2015-01-08 00:37:01 -08:00
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2016-07-24 09:52:04 -07:00
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/** Used as a safe reference for `undefined` in pre-ES5 environments. */
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var undefined;
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2015-01-08 00:37:01 -08:00
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/**
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2015-12-16 17:49:35 -08:00
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* Copies properties of `source` to `object`.
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2015-01-08 00:37:01 -08:00
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*
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* @private
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* @param {Object} source The object to copy properties from.
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2016-03-26 00:00:01 -07:00
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* @param {Array} props The property identifiers to copy.
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2015-12-16 17:49:35 -08:00
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* @param {Object} [object={}] The object to copy properties to.
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2016-04-12 22:18:39 -07:00
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* @param {Function} [customizer] The function to customize copied values.
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2015-01-08 00:37:01 -08:00
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* @returns {Object} Returns `object`.
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*/
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2016-04-12 22:18:39 -07:00
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function copyObject(source, props, object, customizer) {
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2016-09-17 22:24:52 -07:00
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var isNew = !object;
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2016-04-12 22:18:39 -07:00
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object || (object = {});
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var index = -1,
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length = props.length;
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while (++index < length) {
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var key = props[index];
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var newValue = customizer
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? customizer(object[key], source[key], key, object, source)
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2016-07-24 09:52:04 -07:00
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: undefined;
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2016-04-12 22:18:39 -07:00
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2016-09-17 22:24:52 -07:00
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if (newValue === undefined) {
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newValue = source[key];
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}
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if (isNew) {
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baseAssignValue(object, key, newValue);
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} else {
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assignValue(object, key, newValue);
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}
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2016-04-12 22:18:39 -07:00
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}
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return object;
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2015-01-08 00:37:01 -08:00
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}
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2015-12-16 17:53:20 -08:00
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return copyObject;
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2015-01-08 00:37:01 -08:00
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});
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