chat.js

// if you have node installed on your computer you can run this server by doing
// node path/to/this/file.js
// figure out how to install node-js at http://nodejs.org

var tcp = require('tcp');
var cons = [];

var chat = function(cons, socket, message){
  for (var i=0; i < cons.length; i++) {
    if (cons[i] != socket) {
      cons[i].send(message + "\n");
    };
  }
};

var server = tcp.createServer(function (socket) {
  cons.push(socket);
  socket.setEncoding("utf8");
  socket.addListener("connect", function () {
    socket.send("Welcome to the ghetto chat, what is your username?:\n");
  });
  
  socket.addListener("receive", function (data) {
    var data = data.trim();
    if (!socket.username) {
      socket.username = data;
      socket.send("welcome " + socket.username + "\n");
      chat(cons, socket, socket.username + " has connected to the server.");
    }
    else if (data.trim() === "/quit") {
      socket.send("goodbye\r\n");
      socket.close();
      cons.splice(cons.indexOf(socket), 1);
      chat(cons, socket, socket.username + " has left the server.");
    }
    else {
      chat(cons, socket, socket.username + ": " + data);
    }
  });

});
server.listen(8002);

// # here is the ruby code that does the same thing 
// 
// 
// require 'socket'
// port = 7890
// server = TCPServer.new(port)
// 
// def chat(cons, conn, message)
//  cons.each do |c|
//    c.puts message unless c == conn
//  end
// end
// 
// cons = []
// while(connection = server.accept)
//  Thread.new(connection) do |conn|
//    cons << conn
//    conn.puts "Welcome to the ghetto chat, what is your username?:\n"
//    name = conn.gets.chomp
//    conn.puts "Welcome %s!" % name
//    
//    chat(cons, conn, "%s has connected to the server." % name)
//    while( message = conn.gets.chomp)
//      if message == "/quit"
//        cons.delete conn
//        conn.close
//        chat(cons, conn, "%s has left the server." % name)
//        break
//      end
//      chat(cons, conn, "%s: %s" % [name, message])
//    end
//  end
// end