Writing NodeJS code w/o creating deep nesting.

node-with-out-nesting.js

var http = require('http');

http.createServer(function(req, res){sayHello(req,res)}).listen();

function sayHello(req,res) {
  res.writeHead(200, {'Content-Type': 'text/plain'});
  res.end('Hello World\n');
}

function sayGoodbye(req,res) {
  res.writeHead(200, {'Content-Type': 'text/plain'});
  res.end('Goodbye World\n');
}