From: Phrogz <gavin@...>
Date: 2006-10-26T13:00:11+09:00
Subject: Re: Calling functions in a child class

Phrogz wrote:
> Or do you want the exact same list of methods returned regardless of
> what level you call the method at?

Here's an example showing this end result. (Look ma! A real use for
class variables!)

class Alpha
  @@alpha_and_subs = [ self ]
  def self.inherited( subklass )
    @@alpha_and_subs << subklass
  end

  def self.all_methods
    @@alpha_and_subs.map{ |klass|
      klass.instance_methods( false )
    }.flatten
  end

  def alpha1; end
  def alpha2; end
end

class Bravo < Alpha
  def bravo1; end
end

class Charlie < Bravo
  def charlie1; end
end

class Bingo < Alpha
  def bingo1; end
end

p Alpha.all_methods
#=> ["alpha1", "alpha2", "bravo1", "charlie1", "bingo1"]

p Bravo.all_methods
#=> ["alpha1", "alpha2", "bravo1", "charlie1", "bingo1"]

p Charlie.all_methods
#=> ["alpha1", "alpha2", "bravo1", "charlie1", "bingo1"]