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Re: Design Question

To: REALbasic NUG <realbasic-nug@lists.realsoftware.com>
Subject: Re: Design Question
From: Andrew Keller <andrew@kellerfarm.com>
Date: Thu, 30 Oct 2008 11:11:30 -0400
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No. The only exception is subclassing, but you shouldn't subclass unless it is in fact your intention. If a Valve needs to contact an Engine, then the Valve needs a reference to the Engine. It doesn't really matter that there is an array of Valves in the Engine – that kind of referencing only goes in one direction.

HTH -
Andrew Keller

On Oct 30, 2008, at 10:53 AM, Sam Rowlands wrote:

Is there a way to create a class.parent without having a property on the class?

For instance say I have a class called Engine, then I have an array of Valve classes. The array is a property of Engine.

Engine.Valves()

However now I want the valve to communicate with the Engine, to notify the engine when it fails, do I create a property on the valve class called parent and set that to be my engine, or is there some fancy trick I can use to probe the valve and figure it out?

Have a Great Week :)

Sam Rowlands

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