Distinguish origin of Ruby methods

methodizer.rb

# "local" methods are those defined directly on a constant, 
# as opposed to those inherited or mixed in
class Module
  
  def local_class_methods
    self.methods.select { |m| self.method(m).owner == self }
  end
  
  def local_instance_methods
    self.instance_methods.select { |m| self.instance_method(m).owner == self }
  end
  
end

# 1.8.7 has the owner method already, so just hack one up for 1.8.6
class UnboundMethod
  
  unless defined?(owner)
    def owner
      x = self.to_s.match( /: ([\w_:]+)(?:\(([\w_:]+)\))?/ )
      eval( x[2] || x[1] )
    end
  end
  
end

class Method
  
  unless defined?(owner)
    def owner
      x = self.to_s.match( /: ([\w_:]+)(?:\(([\w_:]+)\))?/ )
      eval( x[2] || x[1] )
    end
  end
  
end