ruby -r debug your_script
ext/tcltk/ and loaded with
require "tcltk". The syntax is almost written as in
Tcl, which is passed to Tcl interpreter.
Unfortunately, the description for this library is written in
Japanese.
ext/tk/ and loaded with require "tk".
Its syntax is more like Ruby, which is transformed to Tcl script
and passed to Tcl.
gtk+ or xforms interface in Ruby?
contrib/ in ftp sites, there are ruby-gtk-x.xx.tar.gz
and ruby-forms-x.x.tar.gz.
require "date" or
require "date2". date.rb is fixed to use English
calendar, while date2.rb is for general purpose. Please
also refer sample/cal.rb.