gistfile1.js

module.exports = exports = {    
    create :  function(notCachedClient){
        var cachedClient = {};
        var cache = {};
        
        Object.keys(notCachedClient).forEach(function(method){
            cachedClient[method] = function(){
                
                var args = Array.prototype.slice.call(arguments),
                    cb = args.pop();
                if (cache[method]){
                    process.nextTick(function(){cb(false, cache[method]);});
                } else {
                    var cacheResultThenCb = function(err, data){
                        if (!err){ cache[method] = data; }
                        cb(err,data);
                    };
                    
                    var newArgs = args.concat(cacheResultThenCb);
                    notCachedClient[method].apply(notCachedClient, newArgs);
                }           
            };
        });
        
        return cachedClient;
    }
};