From: Xavier Noria <fxn@...>
Date: 2008-01-19T09:30:15+09:00
Subject: Re: external Module.nesting

On Jan 19, 2008, at 1:07 AM, Xavier Noria wrote:

> On Jan 19, 2008, at 12:29 AM, Daniel Brumbaugh Keeney wrote:
>
>> Is there an obvious method for a module like
>> A::B::C
>> that would result in A::B?
>
> What do you mean?

Oh, perhaps you just want something like Module#parent provided by  
Active Support. There the parent is computed by hand from the module  
name:

    def parent
      parent_name = name.split('::')[0..-2] * '::'
      parent_name.empty? ? Object : parent_name.constantize
    end

where String#constantize is

    def constantize(camel_cased_word)
      unless /\A(?:::)?([A-Z]\w*(?:::[A-Z]\w*)*)\z/ =~ camel_cased_word
        raise NameError, "#{camel_cased_word.inspect} is not a valid  
constant name!"
      end

      Object.module_eval("::#{$1}", __FILE__, __LINE__)
    end

-- fxn