From: Ralph Mason <ralph.mason@...>
Date: 2002-01-24T11:44:44+09:00
Subject: Re: a can be true and false

Both your tests evaluate to true

in test 1.  

a != true (because a == '' )

So this is true

in test 2

a != nil && a != false thus 'a' is true (not equal true )

so this is also true

Ralph

----- Original Message ----- 
From: "Sung Moon" <moontoeki@aol.com>
Newsgroups: comp.lang.ruby
To: "ruby-talk ML" <ruby-talk@ruby-lang.org>; <undisclosed-recipients:>
Sent: Thursday, January 24, 2002 3:35 PM
Subject: a can be true and false


> a can be true and false at the same time
> 
> a = ""
> if a != true; p "a is false" ; end
> if a; p "a is true" ; end
> 
> this produces:
> 
> a is false
> a is true
> 
> It means a can be true and false at the same time.
> Am I right?
> 
> 
> thanks.
> sung moon
>