Given how easy it is to implement this type functionality in pure
ruby, do you really want the added dependency? Especially on a gem
that's still in beat, hasn't been touched since 2005, and requires a
compiler (sure, no big deal, but character types are not worth all
that ceremony). I stumbled across this gem when I was searching for
ctype functionality (
http://www.ruby-forum.com/topic/329485) and
decided that it wasn't worth it.
If you need the methods to be callable on Strings, it's easy to do so.
Also, if you want the functionality to handle Unicode characters,
doing it in pure ruby, using regular expressions, is much easier.
Regards,
Ammar