1 | 'use strict';
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2 |
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3 | Object.defineProperty(exports, "__esModule", {
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4 | value: true
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5 | });
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6 | exports.srandmember = srandmember;
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7 |
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8 | var _lodash = require('lodash');
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9 |
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10 | var _es6Set = require('es6-set');
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11 |
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12 | var _es6Set2 = _interopRequireDefault(_es6Set);
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13 |
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14 | var _arrayFrom = require('array-from');
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15 |
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16 | var _arrayFrom2 = _interopRequireDefault(_arrayFrom);
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17 |
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18 | function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
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19 |
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20 | function srandmember(key, count) {
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21 | if (this.data.has(key) && !(this.data.get(key) instanceof _es6Set2.default)) {
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22 | throw new Error('Key ' + key + ' does not contain a set');
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23 | }
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24 |
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25 | var set = this.data.get(key) || new _es6Set2.default();
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26 | var list = (0, _arrayFrom2.default)(set);
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27 | var total = list.length;
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28 |
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29 | if (total === 0) {
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30 | return null;
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31 | }
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32 |
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33 | var shouldReturnArray = count !== undefined;
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34 | var max = shouldReturnArray ? Math.abs(count) : 1;
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35 | var skipDuplicates = shouldReturnArray && count > -1;
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36 |
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37 | if (skipDuplicates) {
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38 | return (0, _lodash.shuffle)(list.splice(0, max));
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39 | }
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40 |
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41 | var items = [];
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42 | var results = 0;
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43 | while (results < max) {
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44 | var item = list[(0, _lodash.random)(0, total - 1)];
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45 | items.push(item);
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46 |
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47 | results += 1;
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48 | }
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49 |
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50 | return shouldReturnArray ? items : items[0];
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51 | } |
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