competitive 2048 index js pt 2

index-pt2.js

const connections = [null, null];

// Handle a socket connection request from web client
io.on('connection', function (socket) {
  
  // Find an available player number
  let playerIndex = -1;
  for (var i in connections) {
    if (connections[i] === null) {
      playerIndex = i;
    }
  }
  
  // Tell the connecting client what player number they are
  socket.emit('player-number', playerIndex);
  
  // Ignore player 3
  if (playerIndex == -1) return;
  
  connections[playerIndex] = socket;
  
  // Tell everyone else what player number just connected
  socket.broadcast.emit('player-connect', playerIndex);
});