> What do you mean?  Enumerable#grep using "wildcard pattern
> matching?"

Exactly, that would be useful to me, and I'm wondering whether it would be
useful to others.

I think that compared to Java, the ruby built-in classes and the standard
library are somewhat harder to extend. For instance IO is a bit big and
monolithic (imho, hence my RCR about it) - it is easy to use, but hard to
extend or partiallly reuse. I still prefer ruby, though ;-)

> # However Dir itself isn't Enumerable.

irb(main):009:0> Dir.included_modules
[Enumerable, Kernel]

on ruby 1.6.6 (2001-12-26) [i586-mswin32]

Thomas