gistfile1.js

var players = {
  324234: {
    x: 100,
    y: 100
  }
};


socket.on('message', function (data) {
  if (data.type === 'move') {
    var player = players[socket.id];

    if (player) {
      player.x = data.x;
      player.y = data.y;
    }
  }
});


setInterval(function () {
   // Here you can loop over your player objects
}, 1000 / 100);