After the io.sockets.clients() method has been depreciated from the later versions of Socket.io, and after my research couldn\'t find any documentation on the socket.io offi
In Socket.IO 1.4
To get the array of All connected Users :
// io.sockets.connected returns an Object with socketId as its key
var allConnectedClients = Object.keys(io.sockets.connected);// This will return the array of SockeId of all the connected clients
To get the Count of all clients :
var clientsCount = io.engine.clientsCount ; // This will return the count of connected clients