ujos.rb

class OxMama
  def path
  end
end

class WyrwiGlaz < OxMama
  def parent_path
    'junk'
  end
  
  def node_id
    'koshmar'
  end
  
  # Returns the result of the super call, or if it is nil
  # the parent path, and also if the node_id is not nil as
  # well as the parent path will return the parent path suffixed
  # with the predicate in square brackets (maybe), because I already
  # had too much acid anyway. who cares we do have tests.
  # TODO: next coder after me please rewrite this junk.
  def path
    super||(p=parent_path)+(node_id&&p!=''?"[#{node_id}]":'')
  end
end