A Basic Hello World NodeJS script in CoffeeScript. This can be a two or three line script. but i've done it this way to explain the components.

hello.coffee

http = require 'http'               # Require the HTTP Core NodeJS Module (notice the lack of brackets)
port = process.env.PORT or 4000     # The TCP port you want to "listen" on (see line #6)  allows the system (e.g. Heroku to set it or uses 4000 on local machine)
http.createServer (req, res) ->     # Creates a basic Web Server and gives you the REQuest and RESponse objects to the function
  res.writeHead 200                 # Write the HTTP Status Code "200" ("All OK") in the RESponse to the client (browser)
  res.end 'Hello World!'            # End the RESponse with the message 'Hello World'
.listen port                        # the dot before the word listen means "Chain" to the createServer and listen on the port
console.log "Visit: http://localhost:#{port}"  # console.log allows you to write a "Note-to-self" on the command line.

### if any of the above is unclear, Google it! (or msg me for a personal Tutorial: https://twitter.com/nelsonic) ###