From: Zach Dennis <zdennis@...>
Date: 2004-10-30T03:07:35+09:00
Subject: Re: Another scrach on head

Mohammad Khan wrote:

>if (expression)
>   block # 1
>end
>
>block # 1 would be executed if expression is true.
>
>Watch this,
>a = 5
>
># 2
>if (a)
>  block # 2
>end
>
># 3
>if (true)
>  block # 3
>end
>
># 4
>if (a == true)
>  block # 4
>end
>
># 5
>if (a.class == TrueClass)
>  block # 5
>end
>
># 6
>if (not a.nil?)
>  block # 6
>end
>
>Ofcource, block # 4 and #5 would not execute.
>Why would block # 2 ?
>  
>
Everything in ruby except for false and nil return true in a boolean 
expression.

>So, isn't #6 more logical than #2.
>  
>
#2 is more reader friendly at a quick glance and it is faster to type 
then #6.

>Didn't we wanted to mean #6 when we wrote #2
>  
>
#2 and #6 will always evaluate to the same result.

Zach