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40 lines
829 B
40 lines
829 B
module.exports = clone;
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// via http://stackoverflow.com/a/728694/22617
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function clone(obj) {
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// Handle the 3 simple types, and null or undefined
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if (null === obj || 'object' !== typeof obj) {
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return obj;
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}
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var copy;
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// Handle Date
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if (obj instanceof Date) {
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copy = new Date();
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copy.setTime(obj.getTime());
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return copy;
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}
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// Handle Array
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if (obj instanceof Array) {
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copy = [];
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for (var i = 0, len = obj.length; i < len; i++) {
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copy[i] = clone(obj[i]);
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}
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return copy;
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}
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// Handle Object
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if (obj instanceof Object) {
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copy = {};
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for (var attr in obj) {
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if (obj.hasOwnProperty && obj.hasOwnProperty(attr)) {
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copy[attr] = clone(obj[attr]);
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}
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}
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return copy;
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}
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throw new Error('Unable to copy obj! Its type isn\'t supported.');
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} |