From: Jason Mayer <slamboy@...>
Date: 2006-12-27T23:15:37+09:00
Subject: Nuby: VisualuRuby, menutest.rb example with check boxes in submenus

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I'm back to looking at visualuRuby, have two quick questions about this
program:
http://vruby.sourceforge.net/sample/menutest.rb
Basically, I don't understand this line: @checking.checked = ! @
checking.checked?

I added the following which gives me the desired results.

if @checking.checked?
      @label.caption="checked"
else
      @label.caption="unchecked"
end

First question:
what does '= ! @variable' do anyway?  I've never seen an example that did
that.
Second question:
How can what I added be turned into a one-liner?

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