> Incredibly powerful stuff that would be a PITA to write in Javascript ...care to elaborate on that? Javascript is a pretty versatile and expressive language

> Incredibly powerful stuff that would be a PITA to write in Javascript ...care to elaborate on that? Javascript is a pretty versatile and expressive language imho and if you stay away from its dark corners and "anti-features" it's just as good as any other dynamic language (except languages with real metaprogramming facilities like lisps, but this is no the point), so I'd really like an example of a kind of problem/solution/pattern that is easy to express in Ruby code and hard in Javascript code.