define(['../array/slice'], function(slice){

    /**
     * internal method used to create other collection modules.
     */
    function makeCollectionMethod(arrMethod, objMethod, defaultReturn) {
        return function(){
            var args = slice(arguments);
            if (args[0] == null) {
                return defaultReturn;
            }
            // array-like is treated as array
            return (typeof args[0].length === 'number')? arrMethod.apply(null, args) : objMethod.apply(null, args);
        };
    }

    return makeCollectionMethod;

});