53 lines
1.1 KiB
JavaScript
53 lines
1.1 KiB
JavaScript
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import _cloneRegExp from "./_cloneRegExp.js";
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import type from "../type.js";
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/**
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* Copies an object.
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*
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* @private
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* @param {*} value The value to be copied
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* @param {Array} refFrom Array containing the source references
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* @param {Array} refTo Array containing the copied source references
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* @param {Boolean} deep Whether or not to perform deep cloning.
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* @return {*} The copied value.
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*/
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export default function _clone(value, refFrom, refTo, deep) {
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var copy = function copy(copiedValue) {
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var len = refFrom.length;
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var idx = 0;
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while (idx < len) {
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if (value === refFrom[idx]) {
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return refTo[idx];
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}
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idx += 1;
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}
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refFrom[idx + 1] = value;
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refTo[idx + 1] = copiedValue;
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for (var key in value) {
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copiedValue[key] = deep ? _clone(value[key], refFrom, refTo, true) : value[key];
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}
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return copiedValue;
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};
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switch (type(value)) {
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case 'Object':
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return copy({});
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case 'Array':
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return copy([]);
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case 'Date':
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return new Date(value.valueOf());
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case 'RegExp':
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return _cloneRegExp(value);
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default:
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return value;
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}
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}
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