From: Robert Dober <robert.dober@...>
Date: 2007-02-20T04:08:21+09:00
Subject: Re: For loops don't count down

On 2/19/07, Yukihiro Matsumoto <matz@ruby-lang.org> wrote:
> Hi,
>
> In message "Re: For loops don't count down"
>     on Tue, 20 Feb 2007 02:45:27 +0900, Daniel Schierbeck <daniel.schierbeck@gmail.com> writes:
>
> |Is there a necessity for a range such as 5..0 to be empty?
>
> 5..1 is the easiest case,
No it is not, how could we distinguish between a "reversed" range and
an "empty" range.
 but what if "abz".."abc" where we couldn't
> define reasonable String#pred.  Just raise error?
With all due respect if we have a reasonable String#succ we can define
a reasonable String#pred.
>
> I'd rather swap start and end for each operation, if empty iteration
> is not wanted, until we have reverse iteration for generic case.
>
>                                                         matz.
>
>
Cheers
Robert

-- 
We have not succeeded in answering all of our questions.
In fact, in some ways, we are more confused than ever.
But we feel we are confused on a higher level and about more important things.
-Anonymous