From: "David A. Black" <dblack@...>
Date: 2005-11-23T03:42:00+09:00
Subject: Re: semenatics of if/unless/while statement modifiers

Hi --

On Wed, 23 Nov 2005, mathew wrote:

>
> On Nov 22, 2005, at 10:11 AM, ts wrote:
>
>>>>>>> "m" == mathew  <meta@pobox.com> writes:
>>>>>>> 
>> 
>> m> I'm guessing that's why Ruby doesn't have post-test loops either--to
>> m> discourage "German sentence" programming.
>> 
>> What is a post-test loop ? This
>> 
>> moulon% ruby -e 'i = 0; begin puts i; end while i > 0'
>> 0
>> moulon%
>
> <URL:http://www.rubycentral.com/faq/rubyfaq-6.html>
>
> That's a block and a single statement, rather than a loop construct.
>
> A real post-test loop would be something like
>
> repeat ... until x
>
> with no extra do ... end required.
>
> And I think that do ... end while x is ugly too. I tend to prefer doing 
> something to make the loop condition true initially, then doing a normal 
> while loop.

There's no "do" in the example; it's begin...end.  The "begin" isn't
"extra" (any more than "repeat" would be), since otherwise you'd have
no way to know where the body started.

I think it's plenty "real" as is :-)


David

-- 
David A. Black
dblack@wobblini.net