intersection.js #1

define(['./unique', './filter', './every', './contains', './slice'], function (unique, filter, every, contains, slice) {


    /**
     * Return a new Array with elements common to all Arrays.
     * - based on underscore.js implementation
     */
    function intersection(arr) {
        var arrs = slice(arguments, 1),
            result = filter(unique(arr), function(needle){
                return every(arrs, function(haystack){
                    return contains(haystack, needle);
                });
            });
        return result;
    }

    return intersection;

});