From: Juston Davies <justondavies@...>
Date: 2009-07-21T00:50:48+09:00
Subject: Re: Issues with inheritance

You nailed it. I tip my hat to you. I also figured out why child2
looked like it invoking itself, that was a perception error on my
part. Thanks!

On Jul 20, 9:45 am, James Coglan <jcog...@googlemail.com> wrote:
> > The first problem I see is that when I call super.execute it seems to
> > want to ignore my argument and favor of the argument I gave at the
> > hight level of scope. (If I do str = "Robin" in Child2's execute but
> > still call super.execute("batman") it prints ">Robin" in subsequent
> > levels.) The second is that Child2 somehow calls execute on itself
> > once before digging into the next level of the tree, then at the last
> > level it tries to call it on an empty array which goes against the
> > program logic. I'm not new to programming, I've probably built this
> > exact same thing in Java, but I am new to Ruby. Whats wrong with what
> > I'm trying to do?
>
> In Ruby, you just call super() to call the parent method. There are three
> use cases for super:
>
> * Implicit args: `super` -- this calls the parent method with the same
> arguments as the current method call.
> * No args: `super()` -- the explicit empty parens mean call the parent
> method with no arguments, whatever the current method was called with.
> * Explicit args: `super(arg1, arg2 ...)` -- calls the parent method with the
> given arguments.
>
> Hope that helps.
>
> --
> James Coglanhttp://jcoglan.com