3rd example for Deploy 2010

Telephone.js

var net = require('net'),
    _ = require('./underscore-min')._;

var connections = {};

var selectReceiver = function(sender) {
  var eligibleReceivers = _.select(connections, function(conn) {
    return (conn !== sender && !conn.gameData);
  });
  return eligibleReceivers[Math.floor(Math.random() * eligibleReceivers.length)];
};

var judgeGame = function(player, word) {
  if (player.gameData == word.trim()) {
    player.write("BINGO! Your score is now " + ++player.score + "!\n> ");
  } else {
    player.score = 0;
    player.write("\nBUZZ! Your score is now zero.\n> ");
  }
  delete player.gameData;
  clearTimeout(player.timerId);
};

var server = net.createServer(function(sock) {
  sock.setTimeout(0);
  sock.setEncoding("utf8");
  sock.score = 0;

  connections[sock.remotePort] = sock;

  sock.on('data', function(data) {
    if (this.gameData) {
      judgeGame(this, data);
    } else if (_.size(connections) > 1 && data.length > 1) {
      var receiver = selectReceiver(sock);
      receiver.gameData = data.slice(0,15).trim();
      receiver.timerId = setTimeout(judgeGame, 5000, receiver, '');

      receiver.write("\nType \"" + receiver.gameData + "\" - you have 5 seconds!\n> ");
      this.write("Word sent!\n> ");
    } else {
      this.write("> ");
    }
  });

  sock.on('close', function() {
    delete connections[this.remotePort];
    if (this.timerId) { clearTimeout(this.timerId); }
  });

  sock.write("Welcome to telephone!  Send a player a word to type:\n> ");
});

server.listen(8124, "0.0.0.0");
console.log("Server started");