nodejs hello world

gistfile1.txt

var http = require('http');
var port = 8080;
var args = process.argv.splice(2);
if (args.length > 0) {
    port = args[0];
}
http.createServer(function (req, res) {
  res.writeHead(200, {'Content-Type': 'text/plain', 'Cache-Control': 'no-cache'});
  res.end('Hello, world.');
}).listen(port, "");
console.log('Server running at port: ' + port);