From: Kristof Bastiaensen <kristof@...>
Date: 2004-10-02T20:05:08+09:00
Subject: Re: [JOIN] Range syntax & Solitare cypher

On Sat, 02 Oct 2004 07:51:03 +0900, markus wrote:

> On Sat, 2 Oct 2004, Zach Dennis wrote:
> 
>> Markus wrote:
>> 
>> >Here's a simple example of where ... is very nice to have.  You want to
>> >cut a deck and card x, so that x is on the top after the cut:
>> >
>> >deck = deck.values(x..-1,0...x)
>> >
>> >*grin*  Try doing that as concisely without "..."
>> >
>> >-- MarkusQ
>> >  
>> >  
>> deck = deck.values(x..-1,0..x-1)
>> 
>> 
>      Nope.  Sorry.  Try it with:
> 
>         deck = (1..52).to_a
>         x = deck.index(1)
> 
> (or just a deck from 1..10 if you prefer) and then try again.
> 
> -- MarkusQ
> 
> P.S. I repeat, a...b is NOT a synonym for a..b-1

Exactly. 

(3..5-1).include? 4.4  #=> false
(3...5).include? 4.4  #=> true

KB