/**
     * Returns a function that composes multiple functions, passing results to
     * each other.
     */
    function compose() {
        var fns = arguments;
        return function(arg){
            // only cares about the first argument since the chain can only
            // deal with a single return value anyway. It should start from
            // the last fn.
            var n = fns.length;
            while (n--) {
                arg = fns[n].call(this, arg);
            }
            return arg;
         };
     }

     module.exports = compose;