You may have read "10 Scala One Liners to Impress Your Friends" at Marcus Kazmierczak's blog recently featured on HN. Although I don't know Scala (or Java), it all looks quite nice, so I decided to impress my friends too - folks go from Java to Scala, we go from Javascript to CoffeeScript. Assume node.js as the environment for all examples.

An introduction to programming in CoffeeScript with an emphasis on clarity and abstraction.