mirror of
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40 lines
1 KiB
JavaScript
40 lines
1 KiB
JavaScript
var assignValue = require('./_assignValue'),
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baseAssignValue = require('./_baseAssignValue');
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/**
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* Copies properties of `source` to `object`.
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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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* @param {Array} props The property identifiers to copy.
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* @param {Object} [object={}] The object to copy properties to.
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* @param {Function} [customizer] The function to customize copied values.
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* @returns {Object} Returns `object`.
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*/
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function copyObject(source, props, object, customizer) {
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var isNew = !object;
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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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: undefined;
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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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}
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return object;
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}
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module.exports = copyObject;
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