given the other replies I now feel comfortable posting this :)

I vaguely remember what you're talking about , something similar prompted some searching from me (while reading H.O.P), but I can't find my notes, or remember the pertinents ...

Now I did find http://www.robertsosinski.com/2008/12/21/understanding-ruby-blocks-procs-and-lambdas/
http://weblog.raganwald.com/2007/01/closures-and-higher-order-functions.html
http://web.archive.org/web/20070626171316/http://blog.grayproductions.net/articles/category/higher-order-ruby/

Basically, aside from syntax and strict/warnings (perl win), it seems to be the same ball of wompus