Taken from Introduction to Node: Ryan Dahl

Super Simple Chat Server

// source: http://camp.nodejs.org/videos/session-01_introduction_to_node-ryan_dahl.html

// Handles TCP connections
net = require('net');

// define global variables
people = []

// create tcp server
s = net.createServer(function(socket) {
	
	// push socket connections into people array
	people.push(socket);
	
	// when socket receives data
	socket.on("data", function(data) {
		
		// loop through all open sockets
		for (var i=0; i < people.length; i++) {
			// write data to socket other than your own
			if (people[i] != socket) {
				people[i].write(data);				
			}
		}
	});
	
	// when socket closes
	socket.on("end", function() {
		// remove person from socket pool
		var i = people.indexOf(socket);
		people.splice(i, 1);
	});
	
});

// bind tcp server to port
s.listen(8000);