1 | import baseFlatten from './_baseFlatten.js';
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2 | import baseRest from './_baseRest.js';
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3 | import baseUniq from './_baseUniq.js';
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4 | import isArrayLikeObject from './isArrayLikeObject.js';
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5 | import last from './last.js';
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6 |
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7 | /**
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8 | * This method is like `_.union` except that it accepts `comparator` which
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9 | * is invoked to compare elements of `arrays`. Result values are chosen from
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10 | * the first array in which the value occurs. The comparator is invoked
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11 | * 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 combined 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 | * _.unionWith(objects, others, _.isEqual);
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26 | * // => [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }, { 'x': 1, 'y': 1 }]
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27 | */
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28 | var unionWith = baseRest(function(arrays) {
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29 | var comparator = last(arrays);
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30 | comparator = typeof comparator == 'function' ? comparator : undefined;
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31 | return baseUniq(baseFlatten(arrays, 1, isArrayLikeObject, true), undefined, comparator);
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32 | });
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33 |
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34 | export default unionWith;
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