node.js concepts asychrounous

no-continuation.js

app.post('/session/new',function(request, response){
  var session = request.body;
  save_session(session)
  response.render('session_form')
});

save-with-continuation.js

app.post('/session/new',function(request, response){
  var session = request.body;
  save_session(session, function(){
    response.render('session_form');
  });
});

webserver.js

var http = require('http');
http.createServer(function (req, res) {
  res.writeHead(200, {'Content-Type': 'text/plain'});
  res.end('Hello World\n');
}).listen(1337, '127.0.0.1');
console.log('Server running at http://127.0.0.1:1337/');