1 | module.exports = clone;
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2 |
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3 |
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4 | function clone(obj) {
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5 |
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6 | if (null === obj || 'object' !== typeof obj) {
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7 | return obj;
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8 | }
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9 |
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10 | var copy;
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11 |
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12 |
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13 | if (obj instanceof Date) {
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14 | copy = new Date();
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15 | copy.setTime(obj.getTime());
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16 | return copy;
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17 | }
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18 |
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19 |
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20 | if (obj instanceof Array) {
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21 | copy = [];
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22 | for (var i = 0, len = obj.length; i < len; i++) {
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23 | copy[i] = clone(obj[i]);
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24 | }
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25 | return copy;
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26 | }
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27 |
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28 |
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29 | if (obj instanceof Object) {
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30 | copy = {};
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31 | for (var attr in obj) {
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32 | if (obj.hasOwnProperty && obj.hasOwnProperty(attr)) {
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33 | copy[attr] = clone(obj[attr]);
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34 | }
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35 | }
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36 | return copy;
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37 | }
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38 |
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39 | throw new Error('Unable to copy obj! Its type isn\'t supported.');
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40 | } |
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