From: Mohammad Khan <mkhan@...>
Date: 2004-10-30T03:53:05+09:00
Subject: Re: Another scrach on head

On Fri, 2004-10-29 at 14:38, Jamis Buck wrote:

> No, I mispoke for the sake of simplification. nil and false _evaluate to 
> false_ in a boolean context, and everything else evaluates to _true_ in 
> a boolean context.
> 
> Thus
> 
>    puts "here" if false
>    puts "there" if nil
> 
> would print nothing, whereas
> 
>    puts "here" if true
>    puts "there" if 5
>    puts "everywhere" if 1 && Object.new && :foobar
> 
> would print
> 
>    here
>    there
>    everywhere
> 
> Hope that is clearer.
> 
> - Jamis

In other words

a = Whatever.new

puts "a is nil"                    if a.nil?
puts "a is neither nil, nor false" if a
puts "a is true"                   if a == true
puts "a is false"                  if a == false
puts "a is nil again!"             if a == nil

Thanks for your explanation, Jamis.

--
Mohammad