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/node_modules/lodash/intersectionWith.js

https://bitbucket.org/coleman333/smartsite
JavaScript | 41 lines | 17 code | 3 blank | 21 comment | 3 complexity | 23a59eeb0de2f544f927c484439631ec MD5 | raw file
 1var arrayMap = require('./_arrayMap'),
 2    baseIntersection = require('./_baseIntersection'),
 3    baseRest = require('./_baseRest'),
 4    castArrayLikeObject = require('./_castArrayLikeObject'),
 5    last = require('./last');
 6
 7/**
 8 * This method is like `_.intersection` except that it accepts `comparator`
 9 * which is invoked to compare elements of `arrays`. The order and references
10 * of result values are determined by the first array. The comparator is
11 * invoked with two arguments: (arrVal, othVal).
12 *
13 * @static
14 * @memberOf _
15 * @since 4.0.0
16 * @category Array
17 * @param {...Array} [arrays] The arrays to inspect.
18 * @param {Function} [comparator] The comparator invoked per element.
19 * @returns {Array} Returns the new array of intersecting values.
20 * @example
21 *
22 * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }];
23 * var others = [{ 'x': 1, 'y': 1 }, { 'x': 1, 'y': 2 }];
24 *
25 * _.intersectionWith(objects, others, _.isEqual);
26 * // => [{ 'x': 1, 'y': 2 }]
27 */
28var intersectionWith = baseRest(function(arrays) {
29  var comparator = last(arrays),
30      mapped = arrayMap(arrays, castArrayLikeObject);
31
32  comparator = typeof comparator == 'function' ? comparator : undefined;
33  if (comparator) {
34    mapped.pop();
35  }
36  return (mapped.length && mapped[0] === arrays[0])
37    ? baseIntersection(mapped, undefined, comparator)
38    : [];
39});
40
41module.exports = intersectionWith;