From: Mathieu Bouchard <matju@...>
Date: 2001-02-17T03:26:20+09:00
Subject: [ruby-talk:10989] Re: RubyChangeRequest #U002: new proper name for Hash#indexes, Array#indexes

On Fri, 16 Feb 2001, David Alan Black wrote:
> On Fri, 16 Feb 2001, Mathieu Bouchard wrote:
> > Sorry, not really...
> > a = [2,3,5,7]
> > a[2]          #=> 5, one element in single mode
> > a[2..2]	      #=> [5], one element in multiple mode
> irb(main):001:0> a = [1,2,3,4]
> [1, 2, 3, 4]
> irb(main):002:0> a[1].type
> Fixnum
> irb(main):003:0> a[1..1].type
> Array
> I thought the proposed extension to #at would behave like that too -- ?

What do you mean, would behave like that? The proposed extension would
make #at(*indices) return an array, but #at cannot distinguish a list of
one element from a single value -- it's still a parameter list. There is
no equivalent in the #[] realm, which can distinguish a one-element range
from a single element fetch anytime.

matju