Hi, 

In message "[ruby-talk:00633] Continuations???"
    on 99/08/11, clemens.hintze / alcatel.de <clemens.hintze / alcatel.de> writes:

>I seem to have to use the commands `callcc' and `call'. Could somebody
>please explain me, how to use these commands? ;-)

How about [ruby-talk:00328]?
http://blade.nagaokaut.ac.jp/cgi-bin/scat.rb/ruby/ruby-talk/328

HTH ;-)

-- gotoken