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8 | 'use strict';
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10 | module.exports = function diff(arr/*, arrays*/) {
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11 | var len = arguments.length;
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12 | var idx = 0;
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13 | while (++idx < len) {
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14 | arr = diffArray(arr, arguments[idx]);
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15 | }
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16 | return arr;
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17 | };
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18 |
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19 | function diffArray(one, two) {
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20 | if (!Array.isArray(two)) {
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21 | return one.slice();
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22 | }
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23 |
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24 | var tlen = two.length
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25 | var olen = one.length;
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26 | var idx = -1;
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27 | var arr = [];
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28 |
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29 | while (++idx < olen) {
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30 | var ele = one[idx];
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31 |
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32 | var hasEle = false;
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33 | for (var i = 0; i < tlen; i++) {
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34 | var val = two[i];
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35 |
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36 | if (ele === val) {
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37 | hasEle = true;
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38 | break;
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39 | }
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40 | }
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41 |
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42 | if (hasEle === false) {
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43 | arr.push(ele);
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44 | }
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45 | }
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46 | return arr;
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47 | }
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