From: Phlip <phlip2005@...>
Date: 2008-08-25T07:30:51+09:00
Subject: Re: Why 'if 0' succeeds in Ruby

>> I agree with you. I am also used to this. nil should never == true, and
>> neither be == false. Every comparison with nil should just fail.
> 
> Every *comparison* with nil (except with itself) does fail.
> 
> "unless foo" is not a comparison of foo with false, it is exactly
> equivalent to "if not foo".
> 
> You seem to be recommending an SQL-style 3-value logic which is

For the second time so far: His statement is jargon, and is not to be taken 
literally. His code sample showed what he meant!