javascript - 単純な Telnet チャット サーバー nodejs

Question

私は node.js と非同期プログラミングが初めてで、node.js と非同期プログラミングを学ぶ最初の小さなプロジェクトとして、小さな Telnet チャット サーバーを作成しました。プログラムは動作しますが、これが node.js (非同期プログラミング モデル) でプログラムを記述する正しい方法であるかどうかを知りたいです。

  var tcp = require('net');

    var Server = tcp.createServer();
    var pwd=[]; // keep tracks of connected clients 
    var ip=[];  // keeps tracks of connected clients IP address
    var Cpwd = "Rushabh"; // password that you require to login

      Server.on('connection'  ,function(conn){
        conn.setEncoding('utf-8');
        conn.write("Password:");// ask user for password on their terminal
        console.log("[" + conn.remoteAddress + "] has joined the chat");


      conn.on('data' , function(data){
        if(pwd.indexOf(conn)>-1){//check if it is an old client or a new client
          console.log("[" + conn.remoteAddress + "]:"  + data); 
          if(pwd.length > 0){ // check if atleast one client is connected

            sendMessage(conn , data);// broadcast message to all client connected 

          }
        }
        else{//if it is a new client then server should first check for password 
          data= data.toString('utf-8').trim();
          var message = " has joined the chat";
          if(Cpwd == data){ // if it is a new client than check for password
            pwd.push(conn); 
            ip.push(conn.remoteAddress);
            sendMessage(conn , message);
          }

          else {conn.write("Password rejected:" + data);conn.end();}// disconnect client 
        }

      }); 

      conn.on('end' , function() { // remove the client from reference array

       var i , client;
         for(i in pwd){
           client = pwd[i];
           if(!client.writable){
             pwd.splice(i,1);
             console.log(ip[i]+ " has left the chat");
             ip.splice(i,1);
           }
         }

     });

}); 

    function sendMessage(conn , message){ //function to send message to all connected client

      var i , client;
      for(i in pwd){
        client = pwd[i];
        if(client.writable){     
          if(conn === client){       
            client.write("[me]:" + message);         
          }      
          else
            client.write("[" + conn.remoteAddress +"]:" + message);
        }
        else{
          pwd.splice(i , 1);
          console.log(ip[i]+ " has left the chat");
          ip.splice(i,1);
        }   
      }
    }
    Server.listen(8000);