1 | var arrayMap = require('./_arrayMap'),
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2 | baseIntersection = require('./_baseIntersection'),
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3 | baseRest = require('./_baseRest'),
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4 | castArrayLikeObject = require('./_castArrayLikeObject'),
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5 | last = require('./last');
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6 |
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7 | /**
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8 | * This method is like `_.intersection` except that it accepts `comparator`
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9 | * which is invoked to compare elements of `arrays`. The order and references
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10 | * of result values are determined by the first array. The comparator is
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11 | * invoked with two arguments: (arrVal, othVal).
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12 | *
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13 | * @static
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14 | * @memberOf _
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15 | * @since 4.0.0
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16 | * @category Array
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17 | * @param {...Array} [arrays] The arrays to inspect.
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18 | * @param {Function} [comparator] The comparator invoked per element.
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19 | * @returns {Array} Returns the new array of intersecting values.
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20 | * @example
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21 | *
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22 | * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }];
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23 | * var others = [{ 'x': 1, 'y': 1 }, { 'x': 1, 'y': 2 }];
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24 | *
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25 | * _.intersectionWith(objects, others, _.isEqual);
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26 | * // => [{ 'x': 1, 'y': 2 }]
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27 | */
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28 | var intersectionWith = baseRest(function(arrays) {
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29 | var comparator = last(arrays),
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30 | mapped = arrayMap(arrays, castArrayLikeObject);
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31 |
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32 | comparator = typeof comparator == 'function' ? comparator : undefined;
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33 | if (comparator) {
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34 | mapped.pop();
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35 | }
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36 | return (mapped.length && mapped[0] === arrays[0])
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37 | ? baseIntersection(mapped, undefined, comparator)
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38 | : [];
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39 | });
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40 |
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41 | module.exports = intersectionWith;
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