| 1 | import arrayMap from './_arrayMap';
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| 2 | import baseCastArrayLikeObject from './_baseCastArrayLikeObject';
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| 3 | import baseIntersection from './_baseIntersection';
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| 4 | import last from './last';
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| 5 | import rest from './rest';
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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`. Result values are chosen
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| 10 | * from the first array. The comparator is invoked with two arguments:
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| 11 | * (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 = rest(function(arrays) {
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| 29 | var comparator = last(arrays),
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| 30 | mapped = arrayMap(arrays, baseCastArrayLikeObject);
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| 31 |
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| 32 | if (comparator === last(mapped)) {
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| 33 | comparator = undefined;
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| 34 | } else {
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| 35 | mapped.pop();
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| 36 | }
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| 37 | return (mapped.length && mapped[0] === arrays[0])
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| 38 | ? baseIntersection(mapped, undefined, comparator)
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| 39 | : [];
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| 40 | });
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| 41 |
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| 42 | export default intersectionWith;
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