Following is the code on front end, where storeSelUserId
contains user_id to send the message-
FYI - Node Version 1.1.0
//
According to what i understand, you need private notification send to only some users. For that, save your users name to whom you want to send and their corresponding socket in different hashes.
username [socket.name] = username to be added;
usersocket [ socket.name ] =socket;
Then to emit the messages to that user only, use
usersocket[ socket.name ].emit('event for send message', ' what you want to send ');