Following on my CoffeeScript talk at the Ithaca Web Group and my company, GORGES, I downloaded the new Pragmatic Programmers book on CoffeeScript. I have completed the language reference part, and wrote down the tips and tricks I learned along the way. I’ve published my notes on CoffeeScript to a Gist on GitHub. Anything missing?

Casey Dreier gave an excellent summary of Rack, rackup, and middleware. Now that we know what it is, what do we use it for? Anything that manipulates environment variables or abstracts away aspects of the program that aren’t related to the MVC layer of your application.