37 lines
1.2 KiB
JavaScript
37 lines
1.2 KiB
JavaScript
var baseFlatten = require('./_baseFlatten'),
|
|
baseRest = require('./_baseRest'),
|
|
baseUniq = require('./_baseUniq'),
|
|
isArrayLikeObject = require('./isArrayLikeObject'),
|
|
last = require('./last');
|
|
|
|
/**
|
|
* This method is like `_.union` except that it accepts `comparator` which
|
|
* is invoked to compare elements of `arrays`. Result values are chosen from
|
|
* the first array in which the value occurs. The comparator is invoked
|
|
* with two arguments: (arrVal, othVal).
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @since 4.0.0
|
|
* @category Array
|
|
* @param {...Array} [arrays] The arrays to inspect.
|
|
* @param {Function} [comparator] The comparator invoked per element.
|
|
* @returns {Array} Returns the new array of combined values.
|
|
* @example
|
|
*
|
|
* var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }];
|
|
* var others = [{ 'x': 1, 'y': 1 }, { 'x': 1, 'y': 2 }];
|
|
*
|
|
* _.unionWith(objects, others, _.isEqual);
|
|
* // => [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }, { 'x': 1, 'y': 1 }]
|
|
*/
|
|
var unionWith = baseRest(function(arrays) {
|
|
var comparator = last(arrays);
|
|
if (isArrayLikeObject(comparator)) {
|
|
comparator = undefined;
|
|
}
|
|
return baseUniq(baseFlatten(arrays, 1, isArrayLikeObject, true), undefined, comparator);
|
|
});
|
|
|
|
module.exports = unionWith;
|