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Re: large info structure? [message #56124 is a reply to message #56120]

Tue, 02 October 2007 08:42

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

markb77@gmail.com writes:

> I'm writing a widget application which will serve as a data analysis
> platform for scientific image data. The idea is that after loading
> the image, there are many different types of analysis that the user
> may wish to run on it, and this application will support them all.
> There will be an 'Analysis' dropdown menu, for instance, with several
> options. I also want to make it easy to add new analysis methods to
> the program.
>
> I've finished writing the front end and now I'm in the process of
> adding some analysis. What I'm noticing is that the info structure
> that gets passed around between event handlers is getting to be very
> large. Mine is up to 130 variables, at the moment.
>
> Does anyone have a strategy to suggest for dealing with this type of
> situation?

Ahhmumm, may I suggest writing your widget program as an object? :-)

It doesn't solve the "lots of info" problem, but it
does mean you don't have to pass anything around anymore.
It is ALL built right into the fabric of the program.

And the "lots of info" problem eventually gets sorted out
into a "several objects" solution, which tends to compartmentalize
the functionality and keep things from breaking when adding new
functionality.

There is a danger to this kind of programming, however. It is
easy (WAY too easy!) to make your objects "clever". Which is
good, don't get me wrong. But clever objects make it almost
impossible to follow the programming flow. (Have you ever tried
to figure out how something works in the iTool system?) So I would
resist the clever solution whenever possible and write really, really
simple solutions. Six months from now, you will be VERY glad you
did! :-)

Cheers,

David

--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.dfanning.com/
Sepore ma de ni thui. ("Perhaps thou speakest truth.")

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[Message index]

		Re: large info structure? By: Wox on Wed, 03 October 2007 01:06
		Re: large info structure? By: David Fanning on Tue, 02 October 2007 14:35
		Re: large info structure? By: markb77 on Tue, 02 October 2007 14:16
		Re: large info structure? By: Paul Van Delst[1] on Tue, 02 October 2007 14:08
		Re: large info structure? By: David Fanning on Tue, 02 October 2007 13:48
		Re: large info structure? By: markb77 on Tue, 02 October 2007 13:25
		Re: large info structure? By: Michael Galloy on Tue, 02 October 2007 10:52
		Re: large info structure? By: Paul Van Delst[1] on Tue, 02 October 2007 09:56
		Re: large info structure? By: David Fanning on Tue, 02 October 2007 08:42
		Re: large info structure? By: Mike[2] on Fri, 05 October 2007 08:01
		Re: large info structure? By: JD Smith on Thu, 04 October 2007 15:40

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