From: Gregory Brown <gregory.t.brown@...>
Date: 2007-05-11T13:11:02+09:00
Subject: Re: Defending Ruby's OOP

On 5/10/07, Pe�a, Botp <botp@delmonte-phil.com> wrote:
> From: Jason Roelofs [mailto:jameskilton@gmail.com] :
> # Or better yet, tell him to design a language that has "if"
> # "unless" etc as objects and see where that goes. What does having
> # if/unless as objects even mean?
>
> Maybe they mean a boolean class. I myself would like a boolean class in ruby. Sometimes, i feel if-else constructs too restrictive,.. maybe i hate grammar rules.. (maybe because i find english weird language??)
>
> anyway, can we chain booleans like this?
>
> (x<2).iftrue{"got it!"}.capitalize.each{|c| puts c}

to get each char, you don't do each, you do something like each_byte {
|c| c.chr }

But here's a naive implementation of what you're looking for:

class Null
  def self.method_missing(id,*args)
    self
  end
end

class Object
  def iftrue
    self ? yield : Null
  end
end

x = 1
(x<2).iftrue{"got it!"}.capitalize.each_byte {|c| puts c.chr}

x = 3
(x<2).iftrue{"got it!"}.capitalize.each_byte {|c| puts c.chr }