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copied!<p>Node.js was something I was really interested forawhile and I used it in one of my project to make a multiplayer game.</p> <p><code>io.sockets.in().emit()</code> and <code>socket.broadcast.to().emit()</code> are the main two emit methods we use in Socket.io's Rooms (<a href="https://github.com/LearnBoost/socket.io/wiki/Rooms">https://github.com/LearnBoost/socket.io/wiki/Rooms</a>) Rooms allow simple partitioning of the connected clients. This allows events to be emitted with to subsets of the connected client list, and gives a simple method of managing them.</p> <p>They allow us to manage the subsets of the connected client list(which we call rooms) and have the similiar functionalities like the main socket.io functions <code>io.sockets.emit()</code> and <code>socket.broadcast.emit()</code>. </p> <p>Anyway I'll try to give the example codes with the comments to explain. See if it helps;</p> <p><strong>Socket.io Rooms</strong></p> <p>i) io.sockets.in().emit();</p> <pre><code>/* Send message to the room1. It broadcasts the data to all the socket clients which are connected to the room1 */ io.sockets.in('room1').emit('function', {foo:bar}); </code></pre> <p>ii) socket.broadcast.to().emit();</p> <pre><code>io.sockets.on('connection', function (socket) { socket.on('function', function(data){ /* Broadcast to room1 except the sender. In other word, It broadcast all the socket clients which are connected to the room1 except the sender */ socket.broadcast.to('room1').emit('function', {foo:bar}); } } </code></pre> <p><strong>Socket.io</strong></p> <p>i) io.sockets.emit();</p> <pre><code>/* Send message to all. It broadcasts the data to all the socket clients which are connected to the server; */ io.sockets.emit('function', {foo:bar}); </code></pre> <p>ii) socket.broadcast.emit();</p> <pre><code>io.sockets.on('connection', function (socket) { socket.on('function', function(data){ // Broadcast to all the socket clients except the sender socket.broadcast.emit('function', {foo:bar}); } } </code></pre> <p>Cheers</p>

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