1 | 'use strict';
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2 | var $ = require('../internals/export');
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3 | var uncurryThis = require('../internals/function-uncurry-this');
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4 | var toString = require('../internals/to-string');
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5 |
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6 | var fromCharCode = String.fromCharCode;
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7 | var charAt = uncurryThis(''.charAt);
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8 | var exec = uncurryThis(/./.exec);
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9 | var stringSlice = uncurryThis(''.slice);
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10 |
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11 | var hex2 = /^[\da-f]{2}$/i;
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12 | var hex4 = /^[\da-f]{4}$/i;
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13 |
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14 |
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15 |
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16 | $({ global: true }, {
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17 | unescape: function unescape(string) {
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18 | var str = toString(string);
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19 | var result = '';
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20 | var length = str.length;
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21 | var index = 0;
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22 | var chr, part;
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23 | while (index < length) {
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24 | chr = charAt(str, index++);
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25 | if (chr === '%') {
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26 | if (charAt(str, index) === 'u') {
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27 | part = stringSlice(str, index + 1, index + 5);
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28 | if (exec(hex4, part)) {
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29 | result += fromCharCode(parseInt(part, 16));
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30 | index += 5;
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31 | continue;
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32 | }
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33 | } else {
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34 | part = stringSlice(str, index, index + 2);
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35 | if (exec(hex2, part)) {
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36 | result += fromCharCode(parseInt(part, 16));
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37 | index += 2;
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38 | continue;
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39 | }
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40 | }
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41 | }
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42 | result += chr;
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43 | } return result;
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44 | }
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45 | });
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