From: Bertram Scharpf <lists@...>
Date: 2006-07-14T05:12:30+09:00
Subject: Re: Negative Numbers

Hi,

just another comment:

Am Freitag, 14. Jul 2006, 01:22:56 +0900 schrieb Justin Collins:
> Marston A. wrote:
> >I'm just getting started with Ruby and was wondering if there is a way 
> >to translate negative numbers into their positive equals.  i.e turning 
> >-7 into 7.  Thanks for any help.
> 
> irb(main):001:0> -7.abs
> => 7

Be careful. The minus sign is part of the constant. A minus
prepended to a variable takes precedence over the `abs'
function call:

  irb(main):001:0> -7.abs
  => 7
  irb(main):002:0> a=7 ; -a.abs
  => -7

Bertram


-- 
Bertram Scharpf
Stuttgart, Deutschland/Germany
http://www.bertram-scharpf.de