Ruby closure shootout

Ok, so I too have been bitten by the arity differences between Proc.new and lambda so a few months ago I tried to find the Ruby spec to get a better understand. It was then I came to realize that the only true Ruby spec is defined by the C implementation. While such a spec may allow for rapid improvements to the language it comes at the cost of warts--and Ruby is not without it's fair share. I stumbled across this site today that is possibly the best 'research' compiled on Ruby's closures that I have seen to date. It does a great job of exposing Ruby's warts while at the same time demonstrating the power of closures in Ruby.

The article (it's really just a script you can feed the interpreter!) was encouraging in that it showed me I really should spend a little time in the MRI perusing the source for these sorts of tidbits. I can really appreciate all the work that the groups heading up the various Ruby implementations are doing to formalize a Ruby spec.