From: MenTaLguY <mental@...>
Date: 2007-07-06T07:26:24+09:00
Subject: Re: Calling an arbitrary method as and when an array's contents change

On Fri, 6 Jul 2007 07:13:31 +0900, "Dan Stevens (IAmAI)" <dan.stevens.iamai@gmail.com> wrote:
> I have a collection class that extends the Array class and I wish to
> have a particular method to be called whenever the contents of an
> instance of the class change. Can anyone advise on how I can achieve
> this?

For this purpose, it's probably better to wrap/delegate to Array than extend it.

That way, you can have control of all the methods that change something, and
guarantee that they will perform the appropriate notification.  I'd also
recommend looking at Observer for the notification of the equation.

-mental