From: Renald Buter <buter@...>
Date: 2005-06-17T17:48:10+09:00
Subject: Re: Unless unless

On 17:44 Fri 17 Jun     , G?bor SEBESTY?N wrote:
> I have this very simple example:
> 
> a = 1
> b = nil
> puts a.nil?
> puts b.nil?
> puts "ok" unless a.nil? and b.nil?
> 
> Running it results these:
> 
> false
> true
> ok
> 
> Why the third answer is ok? Unless false and true => false ..

Just look carefully and mind that 'unless' is equivalent to 'if not'
 a.nil? => false
 b.nil? => true
 false and true => false
 if not false => if true
 
Regards,

Renald