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var arrayMap = require('./_arrayMap'),
baseIntersection = require('./_baseIntersection'),
castArrayLikeObject = require('./_castArrayLikeObject'),
last = require('./last'),
rest = require('./rest');
/**
* This method is like `_.intersection` except that it accepts `comparator`
* which is invoked to compare elements of `arrays`. Result values are chosen
* from the first array. 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 intersecting values.
* @example
*
* var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }];
* var others = [{ 'x': 1, 'y': 1 }, { 'x': 1, 'y': 2 }];
*
* _.intersectionWith(objects, others, _.isEqual);
* // => [{ 'x': 1, 'y': 2 }]
*/
var intersectionWith = rest(function(arrays) {
var comparator = last(arrays),
mapped = arrayMap(arrays, castArrayLikeObject);
if (comparator === last(mapped)) {
comparator = undefined;
} else {
mapped.pop();
}
return (mapped.length && mapped[0] === arrays[0])
? baseIntersection(mapped, undefined, comparator)
: [];
});
module.exports = intersectionWith;
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