Angular.js filter for adding custom values in brackets

customValuesFilter.js

(function(angular) {
    var addCustomValuesFilter = function () {
        // string | addCustomValues : true : 1 : 2
        return function () {
            var input = arguments[0],
                shouldApplyFilter = arguments[1] !== false,
                i, len,
                values = [],
                result = input;
            if (shouldApplyFilter) {
                for (i = 2, len = arguments.length; i < len; i++) {
                    if (arguments[i] !== null) {
                        values.push(arguments[i]);
                    }
                }
                if (values.length) {
                    result = input + ' (' + values.join(', ') + ')';
                }
            }
            return result;
        };
    };
    angular.module('addCustomValuesFilter', [])
        .filter('addCustomValues', addCustomValuesFilter);
})(angular);