From: Alexandre Mutel <alexandre_mutel@...>
Date: 2009-12-01T07:47:31+09:00
Subject: Re: Problem trying to get a constant with correct scope

Currently, i'm using something like

class Module
  def dyn_const_get(sym)
    list = name.split('::').inject([Object]) {|hierarchy,name| hierarchy 
<< hierarchy.last.const_get(name)}
    result = nil
    while !list.empty? && result.nil?
      begin
        lookup_in = list.pop
        result = lookup_in.const_get sym
      rescue
      end
    end
    result
  end
end

And performing : A::C.dyn_const_get(:B) returns
A::B

But that's a very bad option in terms of performance... I'm wondering if 
there are any other options?
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