From: Trans <transfire@...>
Date: 2007-11-27T23:17:10+09:00
Subject: Re: Strange code or Zerotons instead of Singletons



On Nov 27, 4:48 am, "Robert Dober" <robert.do...@gmail.com> wrote:
> Hi list
>
> I am kind of attached to strange code in that moment, it somehow shows
> up on it's own, I needed a singleton class and of course I had to
> reinvent the wheel.
> Actually, singletons do not always make sense, sometimes zerotons will
> do the trick, so I created my zeroton
>
> class << MyZero = Class::new( Whatever ) {
>    def a; 42 end
>    def new *args, &blk
>       self # or raise YourEyeBrows
>    end
>
> }
>
> and why not
>
> module Kernel
>     def zeroton superclass = Object, &blk
>        returning( Class::new( superclass ) ) { |klass|
>             class << klass; self end.module_eval &blk
>             class << klass
>                 def new *args, &blk
>                     self
>                 end
>             end
>        }
>     end
> end
>
> MyZero = zeroton( Whatever ) {
>    def a; 42 end
>
> }
>
> Any thoughts, insults (moderated though;) ?

Why are you using a class as if it were an instance?

What's wrong with:

  MyZero = Whatever.new
  def what.a; 42; end

T.