On Thu, Aug 01, 2002 at 02:02:35AM +0900, Daniel Bretoi wrote:
> I've been looking at the PP's Guide and I can't seem to see it in there.
> (http://www.rubycentral.com/book/builtins.html)
> 
> Are there any other sources for knowing builtin classes/modules?
> 
> still new,

There are a few.  One of my favorites is:

  ruby -rrbconfig -e 'puts Dir.entries(Config::CONFIG["rubylibdir"])'

though the sources could still use some docs :)

There are also some good books:

  http://www.rubygarden.org/ruby?RubyBookList

Paul