From: Sean O'Halpin <sean.ohalpin@...>
Date: 2007-10-20T07:59:09+09:00
Subject: Re: block composition?

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On 10/19/07, aa <aastanti@hotmail.com> wrote:

> Nevertheless, I'm still interested to know if anybody has ever
> composed different blocks together within the same iteration (and
> how).
>
> Thanks a lot.
> AA
>
>
> Do you mean something like this?

 def search_from(start)
   search_all proc {|s| s.creation >= start }
 end
 def search_to(_end)
   search_all proc {|s| s.creation <= _end }
 end
 def search(start, _end)
   search_all proc {|s| s.creation >= start }, proc { |s| s.creation <= _end
}
 end
 def search_all(*blocks)
   @list.select {|s|
     blocks.all? { |blk| blk.call(s) }
   }
 end

Unfortunately, you can't pass more than one block at a time - you have to
convert them to procs.

Regards,
Sean

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