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on this file since bdd6491 was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago |
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1 | var arrayMap = require('./_arrayMap'),
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2 | baseIteratee = require('./_baseIteratee'),
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3 | basePickBy = require('./_basePickBy'),
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4 | getAllKeysIn = require('./_getAllKeysIn');
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5 |
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6 | /**
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7 | * Creates an object composed of the `object` properties `predicate` returns
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8 | * truthy for. The predicate is invoked with two arguments: (value, key).
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9 | *
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10 | * @static
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11 | * @memberOf _
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12 | * @since 4.0.0
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13 | * @category Object
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14 | * @param {Object} object The source object.
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15 | * @param {Function} [predicate=_.identity] The function invoked per property.
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16 | * @returns {Object} Returns the new object.
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17 | * @example
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18 | *
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19 | * var object = { 'a': 1, 'b': '2', 'c': 3 };
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20 | *
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21 | * _.pickBy(object, _.isNumber);
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22 | * // => { 'a': 1, 'c': 3 }
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23 | */
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24 | function pickBy(object, predicate) {
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25 | if (object == null) {
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26 | return {};
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27 | }
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28 | var props = arrayMap(getAllKeysIn(object), function(prop) {
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29 | return [prop];
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30 | });
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31 | predicate = baseIteratee(predicate);
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32 | return basePickBy(object, props, function(value, path) {
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33 | return predicate(value, path[0]);
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34 | });
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35 | }
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36 |
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37 | module.exports = pickBy;
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