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41 lines
1.4 KiB
41 lines
1.4 KiB
var arrayMap = require('./_arrayMap'), |
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baseIntersection = require('./_baseIntersection'), |
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baseRest = require('./_baseRest'), |
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castArrayLikeObject = require('./_castArrayLikeObject'), |
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last = require('./last'); |
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/** |
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* This method is like `_.intersection` except that it accepts `comparator` |
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* which is invoked to compare elements of `arrays`. The order and references |
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* of result values are determined by the first array. The comparator is |
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* invoked with two arguments: (arrVal, othVal). |
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* |
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* @static |
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* @memberOf _ |
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* @since 4.0.0 |
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* @category Array |
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* @param {...Array} [arrays] The arrays to inspect. |
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* @param {Function} [comparator] The comparator invoked per element. |
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* @returns {Array} Returns the new array of intersecting values. |
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* @example |
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* |
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* var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }]; |
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* var others = [{ 'x': 1, 'y': 1 }, { 'x': 1, 'y': 2 }]; |
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* |
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* _.intersectionWith(objects, others, _.isEqual); |
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* // => [{ 'x': 1, 'y': 2 }] |
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*/ |
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var intersectionWith = baseRest(function(arrays) { |
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var comparator = last(arrays), |
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mapped = arrayMap(arrays, castArrayLikeObject); |
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comparator = typeof comparator == 'function' ? comparator : undefined; |
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if (comparator) { |
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mapped.pop(); |
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} |
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return (mapped.length && mapped[0] === arrays[0]) |
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? baseIntersection(mapped, undefined, comparator) |
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: []; |
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}); |
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module.exports = intersectionWith;
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