From: Will Drewry <drewry@...>
Date: 2004-10-06T15:13:31+09:00
Subject: Re: A ruby course

On Wed, 6 Oct 2004 10:36:43 +0900, Gavin Sinclair
<gsinclair@soyabean.com.au> wrote:
> On Wednesday, October 6, 2004, 3:24:12 AM, Brian wrote:
> 
> > Hello Group,
> 
> > I need more help.
> 
> > Gavin Sinclair wrote:
> >>
> >> p51. Good exercise.  How about another?
> >>
> 
> > Anybody has an idea for an exercise on extending existing classes. So
> > far the only thing I have come up with is:
> 
> > \exercise{Fibonacci II}{
> >    Extend \codetype{Integer} with a function fib that calculates the
> >    corresponding fibonacci number.}
> 
> > And my creativity is at an all time low.
> 
> There are plenty of examples at http://extensions.rubyforge.org.  I
> was thinking of something like String#indent as an exercise, but you
> haven't taught regexen at this point, so that's out.  But something
> else might do.
> 
>>>SNIP<<<

A question someone asked earlier on ruby-talk might be an easy, but
appropriate extension to go with #indent and others:
-- String#pack:

class String
 def pack(arg)
    self.split(//).pack(arg)
  end
end


Good luck!
/wad