[vet-mm] global and local variables

Wed Sep 5 09:16:58 EST 2007

I know this is an old topic but I thought my input might be useful.

I tend to declare all variables on the first frame in the _root
timeline, I don't use the _global option because it is bad programming
practice.  

Global variables can easily become confused with locals, especially in
bigger programs, it also makes your code less portable so you can't
reuse it as easily.

Anyway, this is a huge topic, and I'm sure people will debate this with
me, but in my opinion it's the best way to go.

I find the best practice is to create an object for each major part of
your code in the _root timeline.

var presentation:Object = new ObjectI(); 

var audience.Object = new Object();

and then declaring the variables relating to that part inside the
objects.

presentation.slides = 5;

presentation.boring = true;

audience.sleeping = true;

etc...

You can now reference these objects anywhere in your application using
_root.presentation.slides, _root.audience.sleeping etc...

Hope this helps.

Cheers,

Paul Sijpkes
VET Coordinator
THE KNOX SCHOOL
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________________________________

From: vet-mm-bounces at edulists.com.au
[mailto:vet-mm-bounces at edulists.com.au] On Behalf Of Stoney, Marian Sy
Sent: Wednesday, 22 August 2007 4:35 PM
To: VET Multimedia Teachers' Mailing List
Subject: RE: [vet-mm] global and local variables

Thanks, John. I haven't loaded Flash 8 yet but I'll have to now!  The
advice on declaring them on the main timeline is good,

Regards,

Marian

________________________________

From: vet-mm-bounces at edulists.com.au on behalf of Mr John Parlas
Sent: Tue 21/08/2007 3:26 PM
To: VET Multimedia Teachers' Mailing List
Subject: RE: [vet-mm] global and local variables

Hi Marian,

Not sure what you mean but I suspect it has something to do with how the
variables are declared. Hopefully the attached file can clear the water
a bit. Basically, when variables are declared properly, globals can be
used in other parts of the movie where as locals cannot. I tend to
always declare globals main timeline - not within a function and just
use them within the function.

Look in the frame script to see the code.

Hope this helps????? Flash 8 format.

Regards

John

________________________________

From: vet-mm-bounces at edulists.com.au
[mailto:vet-mm-bounces at edulists.com.au] On Behalf Of Stoney, Marian Sy
Sent: Tuesday, 21 August 2007 12:20 PM
To: vet-mm at edulists.com.au
Subject: [vet-mm] global and local variables

Hi there all you Actionscript types!

I'm wondering why, if I declare a global variable on the timeline, it's
available to a function on a movie clip, but if I declare a global
variable inside a function on a movie clip, it's not available to the
timeline, whilst still being available to other functions on other movie
clips. I thought global functions were supposed to be available
everywhere? I've attached my file, but it's a bit of a mess.

Grateful for any insights!

Thanks,

Marian

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