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34 lines
1.2 KiB
34 lines
1.2 KiB
var baseFlatten = require('./_baseFlatten'), |
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baseRest = require('./_baseRest'), |
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baseUniq = require('./_baseUniq'), |
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isArrayLikeObject = require('./isArrayLikeObject'), |
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last = require('./last'); |
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/** |
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* This method is like `_.union` except that it accepts `comparator` which |
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* is invoked to compare elements of `arrays`. Result values are chosen from |
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* the first array in which the value occurs. The comparator is invoked |
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* 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 combined 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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* _.unionWith(objects, others, _.isEqual); |
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* // => [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }, { 'x': 1, 'y': 1 }] |
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*/ |
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var unionWith = baseRest(function(arrays) { |
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var comparator = last(arrays); |
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comparator = typeof comparator == 'function' ? comparator : undefined; |
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return baseUniq(baseFlatten(arrays, 1, isArrayLikeObject, true), undefined, comparator); |
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}); |
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module.exports = unionWith;
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