From: Trans <transfire@...>
Date: 2007-06-05T14:30:03+09:00
Subject: Re: Reverse-range alternatives?



On Jun 4, 4:51 pm, Kenneth McDonald <kenneth.m.mcdon...@sbcglobal.net>
wrote:
> Since a reverse range (eg. 4...1) is functionally almost the same as an
> empty range, is there an alternative in the standard library, where
> .each would actually iterate over the elements from first to last, in
> this case 4, 3, 2?

Would be nice if Range supported this. It would mean working off a
#pred, not just #succ. It's been a while since I've messed with it,
but I'm pretty sure Facets' Interval class does this.

For a lite solution however you might consider:

  (-4..-1).each { |i| i.abs }

T.