RE: Naming Global Variables

 <snip>
What I'm referring to is some
articles I've read about making the main nothing but calls to
procedures, which I personally don't generally do.
</snip>

I don't like this just the same as I don't like the "main" procedure
using nothing but subroutines (just a personal pet peeve of mine).  Even
if it works as designed, it makes maintenance more difficult than it has
to be (especially using SEU).


Thanks,
Tommy Holden


-----Original Message-----
From: rpg400-l-bounces@xxxxxxxxxxxx
[mailto:rpg400-l-bounces@xxxxxxxxxxxx] On Behalf Of Kurt Anderson
Sent: Tuesday, December 12, 2006 10:02 AM
To: RPG programming on the AS400 / iSeries
Subject: RE: Naming Global Variables

We use the F-spec prefix on display and printer files so those fields
are easily distinguishable.  I think it works pretty well for our shop.
Also, since I'm not a fan of having field names in a dspf or prtf that
is the exact same name as a file field name, I never run into that
situation. 

How would you structure a main() without any logic?  
What if one of the procedures you call in your main has an error?  
Maybe I'm misunderstanding. 

Yeah, error checks *whistles innocently*... While I do monitor for
errors (invalid date into a date field, converting an alpha to numeric,
etc), I usually deal with them from within procedures.  I don't know
what exactly you're really referring to.  What I'm referring to is some
articles I've read about making the main nothing but calls to
procedures, which I personally don't generally do.

Kurt Anderson
Application Developer
Highsmith Inc

-----Original Message-----
From: rpg400-l-bounces@xxxxxxxxxxxx
[mailto:rpg400-l-bounces@xxxxxxxxxxxx] On Behalf Of
AGlauser@xxxxxxxxxxxx
Sent: Tuesday, December 12, 2006 8:24 AM
To: RPG programming on the AS400 / iSeries
Subject: RE: Naming Global Variables

Kurt Anderson wrote on 12/12/2006 08:44:28 AM:

Right now when I have a constant I try to either make it all caps and 
use an underscore between words, or I do something like LBL_OrderNum 
(which could contain a screen label).  The idea of prefixing with a 
lower case c is appealing to me.  Possibly the g as well for globals.

I also use your current method of all caps for constants.
 

I know the use of global variables should be limited, and normally 
they are.  If it's a good day my only globals are logic control of the

main (which could arguably have no logic control) and RRNs.

How would you structure a main() without any logic?  What if one of the
procedures you call in your main has an error?  Maybe I'm
misunderstanding.

If your only globals are logic control and RRNs, does that mean you
don't do many programs involving screen or printer files?  I've been
trying to figure out a good way of passing all of the screen variables
around between procedures so that, while they are technically global
variables, they can look less like globals.  Does anyone have any good
ways of doing this?

Thanks for starting an interesting discussion, Adam

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