[friggeri]

In my opinion, CoffeeScript is not a language, it's nothing more that an alternative syntax for JavaScript. The argument that one should know CS in order to use a CS library makes no sense, it's nothing more than JavaScript and I cannot stress that enough. Where it helps a lot though is that it does remove a lot of JS bad parts and incorporates common patterns. Extending Array in CS is nothing more than `class Foo extends Array` and it's perfectly compatible with plain JS.

Basically, I do have more of a problems with libraries which add layers of indirection (eg using _.each) at eval time when it could be done on CS at compile time.

So, once again, CS is JS, written a little differently and with some nice bonuses.