From: Sean DeNigris <sean@...>
Date: 2010-02-02T00:15:09+09:00
Subject: Re: Inheritance related problem

This is probably the same as what Rick was saying...

If you own Parent, then the method I showed is definitely not what you
want to do.  And, the solution does not require a special Ruby way,
just a refactor:
class Parent
  def printa arg
      puts "inside parent printa #{arg} "
>     task_b arg #<-- problem solved, Parent#printa will always use the same version of printb
  end

  def printb arg
>   task_b arg #<-- delegate work to an extracted method
  end

>private
> def task_b arg # Original implementation of Parent#printb is private helper method
>   puts "inside parent printb #{arg} "
>   puts "--> #{arg} "
> end
end

Output:
 parent calls with 5 and 6
inside parent printa 5
inside parent printb 5
--> 5
 === child calls with 7 ===
inside child printa 7 reduced 1
inside parent printa 6
inside parent printb 6
--> 6