[LRUG] Ruby Cluetrain

[Matthew Rudy Jacobs]

I rewrote it without all the crazy Module.new and Class.new stuff
and it still doesnt make any sense

http://gist.github.com/218649

2009/10/26 Anthony Green <Anthony.Green at bbc.co.uk>

>
> I hope James won't mind me posting this Gist he tweeted at the weekend. But
> it exemplifies the kind of gaps I have in my Ruby knowledge.
> Whilst I understand what individual segments of code are doing I don't
> understand what the code as a whole is attempting to do.
>
> Anyone willing to shed some light ?
>
> http://gist.github.com/217001
>
>
> # I'm creating some classes and modules on the fly, but things aren't
> hooking up quite the way I'd hoped.
> # Can anyone explain why when an instance of Mod::Sibling tries to call
>
> Child.cry, that it
>
> # doesn't call Mod::Child.cry, but instead looks for Behaviour::Child?
>
> class Base
>   def self.cry
>     "#{self.name}.cry called!"
>   end
> end
>
> module Behaviour
>   def blame
>     puts "I am #{self}, a #{self.class.name}, trying to call Child.cry"
>     Child.cry
>   end
> end
>
> child = Class.new(Base)
>
> Mod = Module.new
> Mod.const_set(:Child, child)
>
> child.cry # => "Mod::Child.cry called!"
> Mod::Child.cry # => "Mod::Child.cry called!"
> child.name # => "Mod::Child"
>
> sibling = Class.new(Base)
> sibling.class_eval do
>   include Behaviour
> end
> Mod.const_set(:Sibling, sibling)
> sibling.name # => "Mod::Sibling"
>
> Mod.constants # => ["Child", "Sibling"]
>
> sibling = Mod::Sibling.new
> sibling.blame # =>
> # ~> -:10:in `blame': uninitialized constant Behaviour::Child (NameError)
> # ~>  from -:32
> # >> I am #<Mod::Sibling:0x1973078>, a Mod::Sibling, trying to call
> Child.cry
>
>
>
>
>
> --
> Anthony Green
> Client Side Developer
> Future Media & Technology for BBC Audio & Music Interactive
>
>
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