chat.js

var net = require('net');

var chatServer = net.createServer(),
	clientList = [];

chatServer.on('connection', function(client){
	client.name = client.remoteAddress + ':' + client.remotePort;
	client.write('Hi ' + client.name + '\n');

	clientList.push(client);

	client.on('data', function (data){
		broadcast(data, client);
	});

	client.on('end', function () {
		// коли клієт відключився видаляємо його з масиву clientList
		clientList.splice(clientList.indexOf(client), 1);
	});

	client.on('error', function(e) {
		console.log(e);
	});

	function broadcast(message, client){
		var cleanup = [];
		for (var i = 0; i < clientList.length; i++) {
			if (client !== clientList[i]) {
				if (clientList[i].writable) {
					clientList[i].write(client.name + ' says: ' + message);	
				}
				else {
					cleanup.push(clientList[i]);
					clientList[i].destroy();
				}
			}
		}
		for (var i = 0; i < cleanup.length; i++) {
			clientList.splice(clientList.indexOf(cleanup[i]), 1);
		}
	}
})

chatServer.listen(9000);