1 | 'use strict';
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2 | var bind = require('../internals/function-bind-context');
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3 | var uncurryThis = require('../internals/function-uncurry-this');
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4 | var IndexedObject = require('../internals/indexed-object');
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5 | var toObject = require('../internals/to-object');
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6 | var lengthOfArrayLike = require('../internals/length-of-array-like');
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7 | var MapHelpers = require('../internals/map-helpers');
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8 |
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9 | var Map = MapHelpers.Map;
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10 | var mapGet = MapHelpers.get;
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11 | var mapHas = MapHelpers.has;
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12 | var mapSet = MapHelpers.set;
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13 | var push = uncurryThis([].push);
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14 |
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15 |
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16 |
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17 | module.exports = function groupToMap(callbackfn /* , thisArg */) {
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18 | var O = toObject(this);
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19 | var self = IndexedObject(O);
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20 | var boundFunction = bind(callbackfn, arguments.length > 1 ? arguments[1] : undefined);
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21 | var map = new Map();
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22 | var length = lengthOfArrayLike(self);
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23 | var index = 0;
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24 | var key, value;
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25 | for (;length > index; index++) {
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26 | value = self[index];
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27 | key = boundFunction(value, index, O);
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28 | if (mapHas(map, key)) push(mapGet(map, key), value);
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29 | else mapSet(map, key, [value]);
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30 | } return map;
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31 | };
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