From: Robert Dober <robert.dober@...>
Date: 2007-02-20T04:31:08+09:00
Subject: Re: For loops don't count down

On 2/19/07, dblack@wobblini.net <dblack@wobblini.net> wrote:
> Hi --
>
> On Tue, 20 Feb 2007, Robert Dober wrote:
>
> > 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.
>
> See the thread starting at ruby-talk 38910 for an earlier discussion
> of this.  It's not easy, and it's arbitrary and of questionable
> usefulness.  (I don't think ranges need to be any more array-like than
> they already are -- possibly less.)

I do not like the lack of symmetry it just feels not right.
I have mixed feelings about String#succ (can be convenient for sure
and very confusing too).
It is no good though to say String#pred will be the same mess, well
than let us remove String#succ too (unfortunately I guess that would
brake too much code.)
I'd like to have a look at the thread though (long time ago, or did I
miss it?) only that the N� is not really good enough for me to find
it.

Sorry if I am the nasty guy again :(

Cheers
Robert


>
>
> David
>
> --
> Q. What is THE Ruby book for Rails developers?
> A. RUBY FOR RAILS by David A. Black (http://www.manning.com/black)
>     (See what readers are saying!  http://www.rubypal.com/r4rrevs.pdf)
> Q. Where can I get Ruby/Rails on-site training, consulting, coaching?
> A. Ruby Power and Light, LLC (http://www.rubypal.com)
>
>


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In fact, in some ways, we are more confused than ever.
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