gistfile1.js

var net = require('net');

var chatroom = [];

var server = net.createServer(function(user) {
  user.on('connect', function() {
    console.log('user connected');
    chatroom.push(user);
  });

  user.on('data', function(data) {
    for (var i = 0; i < chatroom.length; i++) {
      chatroom[i].write(data);
    }
  });

  user.on('end', function() {
    console.log('user disconnected');
  });

});

server.listen(3000);