From: Simon Cozens <simon@...>
Date: 2003-01-24T23:08:39+09:00
Subject: Re: Definition: iterator

Paul Brannan <pbrannan@atdesk.com> writes:
> > 1) we can call block several times
> > 2) we can't return control from middle of block
> 
> I don't understand what you mean.  I believe that functions that take blocks
> meat both these criteria.

That would be true if you could essentially "yield" back to the calling
routine, so this would say:

> foo do
>   puts "this is a test"
>   next
>   puts "you should not see this message"
> end

 1
 this is a test
 2
 you should not see this message.

Co-routines can switch control both ways.

-- 
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