From: Christian Neukirchen <chneukirchen@...>
Date: 2007-02-20T03:41:31+09:00
Subject: Re: For loops don't count down

"Martin DeMello" <martindemello@gmail.com> writes:

> On 2/19/07, Harry <ruby.hardware@gmail.com> wrote:
>> >
>> I never use 'for' loops in Ruby. So I can't explain if or why not, etc.
>
> "for x in xs" translates internally to "xs.each do |x|", so the
> underlying problem is that Range#each only counts upwards.

That's not entirely true (there are differences in scope), but the
behavior of #each matters here, yes.

Ranges can't be reversed in general, because there is no backward
equivalent to #succ.

> martin
-- 
Christian Neukirchen  <chneukirchen@gmail.com>  http://chneukirchen.org