From: James Edward Gray II <james@...>
Date: 2006-04-12T01:54:38+09:00
Subject: Re: Smalltalk's favorite Boolean method

On Apr 11, 2006, at 10:24 AM, Christian Neukirchen wrote:

> James Edward Gray II <james@grayproductions.net> writes:
>
>>>> class Object
>>>>   def true?
>>>>     yield self if self
>>>>     self
>>>>   end
>>>>   def false?
>>>>     yield self unless self
>>>>     self
>>>>   end
>>>> end
>> => nil
>>>> (1 == 2).true? { puts "True!" }.false? { puts "False!" }
>> False!
>> => false
>>>> (1 != 2).true? { puts "True!" }.false? { puts "False!" }
>> True!
>> => true
>>
>> Hope that gives you some fresh ideas.
>
> *hears 1000 functional programmers whine about return values  
> getting lost*

I didn't say I *liked* it.  I just said it got rid of the need to  
call proc() twice.  A boring if statement is all I need.  ;)

James Edward Gray II