From: Matthew Berg <galt@...>
Date: 2003-11-12T07:04:54+09:00
Subject: Re: Array#slice oddity...

On Tue, 2003-11-11 at 16:45, Joel VanderWerf wrote:
> Matthew Berg wrote:
> > It appears that if you use slice or slice! with a length argument, it
> > returns an array even if the index is out of range:
> > 
> >   irb(main):001:0> a = []
> >   => []
> >   irb(main):002:0> b = a.slice(0)
> >   => nil
> >   irb(main):003:0> b = a.slice(0,1)
> >   => []
> 
> Shouldn't a[0] and a[0,1][0] return the same value?

That they do... 

  irb(main):002:0> a[0]
  => nil
  irb(main):003:0> a[0,1][0]
  => nil

Another thing I noticed is that this behaviour is only exhibited if the
start index is 0:

  irb(main):004:0> a[0,1]
  => []
  irb(main):005:0> a[1,2]
  => nil

The same thing happens with ranges:

  irb(main):006:0> a[0..1]
  => []
  irb(main):007:0> a[1..2]
  => nil

-- 
Matthew Berg <galt@gothpoodle.com>