node.js - Socket.io rooms difference between broadcast.to and sockets.in

Question

Socket.io's readme contains the following example:

    var io = require('socket.io').listen(80);

    io.sockets.on('connection', function (socket) {
      socket.join('justin bieber fans');
      socket.broadcast.to('justin bieber fans').emit('new fan');
      io.sockets.in('rammstein fans').emit('new non-fan');
    });

What's the difference between socket.broadcast.to() and io.sockets.in()?

Answer 1

socket.broadcast.to broadcasts to all sockets in the given room, except to the socket on which it was called while io.sockets.in broadcasts to all sockets in the given room.