From: James Coglan <jcoglan@...>
Date: 2009-07-21T00:45:48+09:00
Subject: Re: Issues with inheritance

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> 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 Coglan
http://jcoglan.com

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