From: Sarah Tanembaum <sarahtanembaum@...>
Date: 2004-12-01T23:37:53+09:00
Subject: List of ruby extensions/libraries

I was wondering if there is a command or a little script in Ruby to list 
all Ruby components(pure-ruby-library, dll library, functions,etc)  that 
are installed in the current Ruby environment. I'm interested in finding 
out its name, version number, etc. THanks