From: Bryan Richardson <btrichardson@...>
Date: 2009-03-18T23:25:26+09:00
Subject: Derived-class initialization

Hello all,

I'm having some trouble with extending an existing Ruby class in order
to add functionality.  Here's some example code:

class Graph
  ....
  ....
  def subgraph(*args)
    graph = self.new
    ....
    ....
    return graph
  end
end

class AwesomeGraph < Graph
  ....
  ....
  def do_something
    ....
    ....
  end
end

g = AwesomeGraph.new
a = g.subgraph(g.nodes)
a.do_something // ERROR! No Graph#do_something exists!

I was hoping 'self.new' would take into account the derived class used
upon creation, but it doesn't.

Any suggestions?

--
Thanks!
Bryan
-- 
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