Create a list of Connected Clients using socket.io

Question

Here are 2 related questions. Posting them together makes more sense.

Question 1

I have a node.js app which emits an event out to all client

Answer 1

Socket.io provides you with a public api for that, so instead of hacking something up like Bryan suggest you can use:

io.sockets.clients()

That will returns an array of all connected clients.

If you want all clients connected to a certain namespace:

io.of('/namespace').clients()

But you can even filter it even more.. if you want to have all sockets in a room:

io.sockets.clients('room name here as first argument')

Will return a array of connected sockets for the room room name here as first argument