Rubyinstaller devel - Aug 2009 - release: a "which" command written in ruby--very useful for windows users at least

Announcing the release of "ruby which"[1]

README:
Ruby-which is the linux "which" command re-written in ruby [and
windows-friendly].

-- An executable locator (which command) for windows that actually works!

There seems to be a lack of a "which" command for windows that
actually work--they sometimes skip batch files entirely [batch file?
what''s that?] or don''t list extensions, leaving you in doubt. 
Despite
running "which yyy" you never know what you''re really running
when you
next run yyy in the command line--is it yyy.exe or some other yyy.bat
that wasn''t reported by "which"?

Try it--you might really like it.

To install:

   C:\>gem install rogerdpack-whichr

   C:\>whichr executable_name_here [extension can be included, but is
optional]

   usage:

   C:\>whichr ruby
   higher in the list will be executed first
   ./ruby.bat
   C:/Ruby/bin/ruby.exe
   c:/cygwin/bin/ruby.exe

Feedback welcome rogerdpack on github/gmail
[1] not to be confused with this
witch...http://www.youtube.com/watch?v=vGm7DLMhQxo


Also Related: http://github.com/Pistos/ruby-which -- this library
discovers the location of installed ruby libraries, i.e. which gem
folder they''re in
"C:\>rwhich ruby-which
c:/ruby/lib/ruby/gems/1.9.1/gems/Pistos-ruby-which-0.5.3/lib/ruby-which.rb"

Enjoy.
-r