From: Rob Biedenharn <Rob@...>
Date: 2007-12-16T09:26:19+09:00
Subject: Re: Automatic Range?

On Dec 15, 2007, at 7:15 PM, Jari Williamsson wrote:
> Problem is simple:
> I want to know if an integer is within the range of x and y.  
> However, I don't automatically know which of x & y is the largest.
>
> Ruby accepts ranges like (5..2), although there seems to be no real  
> use for them.
>
> Anyway, is it possible to automatically create a "valid range", or  
> is this kind of solution the best one?
>
> range = x < y ? (x..y) : (y..x)
>
> Best regards,
>
> Jari Williamsson


That's probably as good as it gets.  However, Ranges with #end <  
#begin are common as arguments to String#[] such as "abcdefg"[2..-2]  
=> "cdef".

-Rob

Rob Biedenharn		http://agileconsultingllc.com
Rob@AgileConsultingLLC.com