[wtetzner]

The difference is that CoffeeScript was designed to compile to JavaScript, so it can adopt JavaScript semantics.

Ruby doesn't have the same semantics as JavaScript, so you can't have a 1-to-1 mapping of language constructs.

[jonny_eh]

Oh I get that. I'm sure they did as good as job as possible, but it still makes me nervous.

As nice a language as Ruby is, I don't think it's worth the trade-off. I'll stick with CoffeeScript since it's a nice compromise between Ruby and JavaScript.