node_server.js

    var app = require('express')();
    var http = require('http').Server(app);
    var io = require('socket.io')(http);
    var cardid = 1;
    var num_players = 0;
    var Cards;
    var NUM_DEAL = 5;
    var PlayersInfo = new Array();
    var Players = new Array();



    var PlayerInfo = function(id,name,numberOfStacks){
        var self = this;
        self.p_name =   name;
        self.p_id = id;
        self.numberOfStacks = numberOfStacks;
        return self;
    }

    var indexOf =function(rank)
    {
        if(1< rank && rank <=10)
                return rank;
        console.log("Rank is greater than 10 :"+rank);
        if(rank=="A")
            return 1;
        if(rank=="J")
            return 11;
        if(rank=="Q")
            return 12;
        if(rank=="K")
            return 13;
    }



    var Player = function(id,name,cards)
    {
        var self = this;
        self.p_id = id;
        self.p_name = name;
        self.p_cards = cards;
        self.stackCount = new Array(14);
        for(i=1;i<14;i++)
            self.stackCount[i] = 0;
        self.numberOfStacks = 0;
        self.turn = false;
        return self;
    }

    var Card = function(rank,suit)
    {
        var self = this;
        self.id = cardid++;
        self.rank = rank;
        self.suit = suit;
        self.name = self.rank + self.suit;
        return self;
    }
    var removePlayer=function(player)
    {
        for(i=0;i<Players.length;i++)   
        {
            if(Players[i].p_id == player.p_id)
            {
                Players.splice(i,1);
                i--;
                return;
            }
        }
    }
    function stackShuffle() {

        var i, j, k;
        var temp;
        // Shuffle the stack 'n' times.

        for (j = 0; j < Cards.length; j++) {
            k = Math.floor(Math.random() * Cards.length);
            temp = Cards[j];
            Cards[j] =Cards[k];
            Cards[k] = temp;
        }
    }

    function stackDeal() {
        if (Cards.length > 0)
            return Cards.shift();

        else
            return null;
    }

    var removeRank = function(p_cards,rank)
    {
        console.log("+++++++++++++++++++++++"+p_cards.length+"Rank:"+rank);
        for(i=0;i<p_cards.length;i++)
        {
            if(p_cards[i].rank == rank)
            {
                p_cards.splice(i,1);
                i--;
            }
        }
        console.log("-------------------------"+p_cards.length+"Rank:"+rank);
        return p_cards;
    }

    var pickRandom = function()
    {
        return stackDeal();
    }


    var removeCards = function(p_id,num){
       var askedPlayer;
        for (i = 0; i < Players.length; i++) {
            if (Players[i].p_id == p_id) {
                askedPlayer = Players[i];
                for (j = 0; j < askedPlayer.p_cards.length; j++) {
                    if (askedPlayer.p_cards[j].rank == num) {
                        askedPlayer.p_cards.splice(j,1);
                        j--;
                    }
                }
            }
        }
        return askedPlayer;
    }


    var displayStack = function(stack)
    {
        for(i=1;i<14;i++)
        {
            console.log(i+":"+stack[i]);
        }
    }


    var findCards = function (num, p_id) {
        var resultAsk = new Array();
        for (i = 0; i < Players.length; i++) {
            if (Players[i].p_id == p_id) {
                for (j = 0; j < Players[i].p_cards.length; j++) {
                    if (Players[i].p_cards[j].rank == num) {
                        resultAsk.push(Players[i].p_cards[j]);
                    }
                }
            }
        }
        return resultAsk;
    }

    var gameEnd = function(){
        var max =-1;
        var winner;
        for(i=0;i<Players.length;i++)
        {
            if(max < Players[i].numberOfStacks)
            {
                max = Players[i].numberOfStacks;
                winner = Players[i];
            }
        }
        console.log("Game end 1");
        io.sockets.emit('gameOver',winner);
         console.log("Game end 2");

    }
        var createDeck = function() {

            var n =1;
            var ranks = new Array("A", "2", "3", "4", "5", "6", "7", "8", "9",
                                  "10", "J", "Q", "K");
            var suits = new Array("C", "D", "H", "S");
            var i, j, k;
            var m;
            l =0;
            m = ranks.length * suits.length;

            // Set array of cards.

            Cards = new Array(m);

            // Fill the array with 'n' packs of cards.

            // for (i = 0; i < n; i++)
            for (j = 0; j < suits.length; j++)
                for (k = 0; k < ranks.length; k++)
                    Cards[l++] =
                      new Card(ranks[k], suits[j]);
        }

        app.get('/', function(req, res){
            res.sendFile('index.html', { root: __dirname });
        });

        io.on('connection', function(socket){

           var newPlayer;
            socket.on('requestCards',function(name){
                   num_players++;

            if(num_players==1)
            {
                createDeck();

            }

                stackShuffle();
                var player_cards =  new Array(NUM_DEAL);

                for(i = 0; i < NUM_DEAL; i++) {
                    var cardReturned = stackDeal();
                    console.log("Card Removed"+cardReturned.name);
                    player_cards[i] = cardReturned;
                }
                newPlayer = new Player(socket.id,name,player_cards);


                for(i =0;i< NUM_DEAL;i++)
                {
                    //console.log(indexOf(player_cards[i].rank));
                    newPlayer.stackCount[indexOf(player_cards[i].rank)]++;
                    if(newPlayer.stackCount[indexOf(player_cards[i].rank)] == 4)
                    {
                        newPlayer.p_cards = removeRank(newPlayer.p_cards,card.rank);
                        newPlayer.stackCount[indexOf(player_cards[i].rank)] = 0;
                        newPlayer.numberOfStacks++;
                        var playerInfo = new PlayerInfo(newPlayer.p_id,newPlayer.p_name,newPlayer.numberOfStacks);
                        io.sockets.emit('updatePlayerStackCount',playerInfo);
                    }
                    //console.log(newPlayer.stackCount[indexOf(player_cards[i].rank)]);
                } 


                displayStack(newPlayer.stackCount);
                Players.push(newPlayer);


                socket.emit('sendCards',newPlayer);
                 if(num_players == 1)
                 {
                     console.log("Emiting turn for 1st player");
                    socket.emit('turn',newPlayer.p_id);
                 }
            });




            socket.on('myName' , function(name){
                console.log('new player with name: ' + name);
                var newPlayerInfo = new PlayerInfo(socket.id,name,0);
                PlayersInfo.push(newPlayerInfo);
                io.sockets.emit('playersInfoObject',PlayersInfo);
            });


            socket.on('ask',function(number,p_id){
               console.log("Cards length"+Cards.length);
               var currPid = p_id;
                console.log("Number:"+number+"+Pid :"+p_id); 
                var askedCards = findCards(number,p_id);
                console.log("Asked Cards :"+askedCards.length);

                if(askedCards.length > 0)
                {
                     if(Cards.length!=0)
               {
                     newPlayer.stackCount[indexOf(askedCards[0].rank)]+=askedCards.length;

                for(var i=0;i<askedCards.length;i++)
                {
                    newPlayer.p_cards.push(askedCards[i]);
                }
                if(newPlayer.stackCount[indexOf(askedCards[0].rank)] == 4)
                {
                        newPlayer.p_cards = removeRank(newPlayer.p_cards,askedCards[0].rank);
                        newPlayer.stackCount[indexOf(askedCards[0].rank)] = 0;
                        newPlayer.numberOfStacks++;
                     var playerInfo = new PlayerInfo(newPlayer.p_id,newPlayer.p_name,newPlayer.numberOfStacks);
                        io.sockets.emit('updatePlayerStackCount',playerInfo);
                }



                    var askedPlayer = removeCards(p_id,askedCards[0].rank);

                    askedPlayer.stackCount[indexOf(askedCards[0].rank)]-=askedCards.length;
                    removePlayer(askedPlayer);
                    console.log("Asked Player Removed:"+askedPlayer.p_id);
                    Players.push(askedPlayer);
                    if (io.sockets.connected[p_id]) {
                    io.sockets.connected[p_id].emit('sendCards',askedPlayer);

                        //console.log(askedPlayer.p_cards.length);
                    }

                removePlayer(newPlayer);
            //    console.log("Player Removed:"+newPlayer.p_id);
                Players.push(newPlayer);
              //  console.log("Player Pushed:"+newPlayer.p_id);
                socket.emit("resultAsk",newPlayer,1);
                    console.log("Adding "+askedCards[0].rank);
                    displayStack(newPlayer.stackCount);
                    if(Cards.length==0)
                        gameEnd();
                }
               }
                else// Go fish case
                {
                    if(Cards.length != 0)
                    {
                    var card = pickRandom();
                    newPlayer.p_cards.push(card);
                    newPlayer.stackCount[indexOf(card.rank)]++;
                    if(newPlayer.stackCount[indexOf(card.rank)] == 4)
                    {
                        newPlayer.p_cards = removeRank(newPlayer.p_cards,card.rank);
                        newPlayer.stackCount[indexOf(card.rank)] = 0;
                        newPlayer.numberOfStacks++;
                        var playerInfo = new PlayerInfo(newPlayer.p_id,newPlayer.p_name,newPlayer.numberOfStacks);
                        io.sockets.emit('updatePlayerStackCount',playerInfo);
                    }
                    removePlayer(newPlayer);
                   // console.log("Player Removed:"+newPlayer.p_id);
                    Players.push(newPlayer);
                   // console.log("Player Pushed:"+newPlayer.p_id);
                    newPlayer.turn = false;

                    for(var i=0;i<Players.length;i++)
                    {
                        if(Players[i].p_id == newPlayer.p_id)
                        {
                            console.log("i previous::: " +i);
                            console.log("players length:::  "+ Players.length);
                            i = (i+1)%Players.length;
                            console.log("i later::: "+i);
                            io.sockets.emit('turn',Players[i].p_id);
                            break;
                        }

                    }

                    socket.emit("resultAsk",newPlayer,0);
                    console.log("Adding Go Fish "+card.rank);
                    displayStack(newPlayer.stackCount);

                    if(Cards.length==0)
                        gameEnd();
                    }
                }
            });



        });

        http.listen(3000, function(){
            console.log('listening on *:3000');
        });