1 | ;
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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.default = keyValMap;
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7 |
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8 | /**
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9 | * Creates a keyed JS object from an array, given a function to produce the keys
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10 | * and a function to produce the values from each item in the array.
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11 | *
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12 | * const phoneBook = [
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13 | * { name: 'Jon', num: '555-1234' },
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14 | * { name: 'Jenny', num: '867-5309' }
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15 | * ]
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16 | *
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17 | * // { Jon: '555-1234', Jenny: '867-5309' }
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18 | * const phonesByName = keyValMap(
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19 | * phoneBook,
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20 | * entry => entry.name,
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21 | * entry => entry.num
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22 | * )
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23 | *
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24 | */
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25 | function keyValMap(list, keyFn, valFn) {
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26 | return list.reduce(function (map, item) {
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27 | map[keyFn(item)] = valFn(item);
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28 | return map;
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29 | }, Object.create(null));
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30 | }
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