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Aaron,


I wondered the same thing. Unlike RPG II and III, at least the subroutine names are descriptive.


I'm only guessing here that what Wes was alluding to is that these should have been subprocedures. Paul Tuohy gave an excellent presentation at the Minneapolis conference last month about externalizing the data access.

        * Jerry C. Adams
*IBM System i Programmer/Analyst
B&W Wholesale Distributors, Inc.* *
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albartell wrote:

<Wes> Interesting, some of the prominent presentors at COMMON, etc. still hand out
examples that say:

Exsr Read_record

Exsr Update_record

Huh? </Wes>

What's wrong with that?  Or rather, what is your definition of modular
programming?

Aaron Bartell




-----Original Message-----
From: rpg400-l-bounces@xxxxxxxxxxxx [mailto:rpg400-l-bounces@xxxxxxxxxxxx]
On Behalf Of Wes Reinhold
Sent: Tuesday, April 25, 2006 4:08 PM
To: RPG programming on the AS400 / iSeries
Subject: RE: Recommendations for Modular Coding HOWTO

Well, Top Down Structured Programming (or modular)  sure made sense in the
70's, when programs could produce a horrible tangle of code.  It makes sense
today, given the way RPG is evolving with /Free, etc.  I teach it to my
upcoming RPG programmers.
Interesting, some of the prominent presentors at COMMON, etc. still hand
out examples that say:

Exsr Read_record

Exsr Update_record

Huh?
-----Original Message-----
From: rpg400-l-bounces+wesr=scc-inc.com@xxxxxxxxxxxx
[mailto:rpg400-l-bounces+wesr=scc-inc.com@xxxxxxxxxxxx] On Behalf Of Alan
Shore
Sent: Tuesday, April 25, 2006 4:59 PM
To: RPG programming on the AS400 / iSeries
Subject: RE: Recommendations for Modular Coding HOWTO


"Actually, modular (or structured) programming was how they taught us to
write COBOL back in the 1970's.  Interesting to see it resurfacing."

That's the same for me. I learnt/was taught COBOL back in the 1970's, and
then introduced to modular (or structured) programming once I
(supposedly) understood COBOL. Another name given to modular programming was
GOTO-less programming.
The way modular programming was explained to me was to split the coding into
little blocks (sections or paragraphs etc. in COBOL, subroutines etc in
RPG). These little blocks of coding had one single purpose in life. For
example, that purpose was to:- 1. Print the headings on a new page OR 2.
Write a record to a file. (This may also include the increment of a counter,
as well as the initialization of fields in that record, prior to returning
back to the mainline code.
OR
3. Calculating the check digit to an account number A good way of
modularizing, was that each little block would correspond to a block in our
flow-chart. (I haven't seen one of those in decades).
There are no real hard and fast rules to this. Somebody is going to read
what I have written and proclaim, "What a load of !@#$%^&.
Modularization is such and such a thing", and from their perspective, they
would be correct.
A question you have to ask is, does this little block of code (Section,
paragraph, subroutine etc.) do one thing?
If need be, can this little block of code (Section, paragraph, subroutine
etc.) be used in multiple different places and obtain the same end-result,
with no change.


Alan Shore

NBTY, Inc
(631) 244-2000 ext. 5019
AShore@xxxxxxxx




            "Wilt, Charles"

            <CWilt@xxxxxxxxxx

            om>
To Sent by: "RPG programming on the AS400 /

            rpg400-l-bounces@         iSeries" <rpg400-l@xxxxxxxxxxxx>

            midrange.com
cc


Subject 04/25/2006 03:00 RE: Recommendations for Modular

            PM                        Coding HOWTO





            Please respond to

             RPG programming

             on the AS400 /

                 iSeries

            <rpg400-l@midrang

                 e.com>









Wes,

The "Who Knew..." Redbook is on my list.

It's useful, but limited in the amount of examples it provides with respect
to modular coding.


Thanks,

Charles Wilt
--
iSeries Systems Administrator / Developer Mitsubishi Electric Automotive
America
ph: 513-573-4343
fax: 513-398-1121


-----Original Message-----
From: rpg400-l-bounces@xxxxxxxxxxxx
[mailto:rpg400-l-bounces@xxxxxxxxxxxx] On Behalf Of Wes Reinhold
Sent: Tuesday, April 25, 2006 1:48 PM
To: RPG programming on the AS400 / iSeries
Subject: RE: Recommendations for Modular Coding HOWTO

The RedBook, "Who knew you do that with RPG IV, etc. etc.", at least the older version, has a good chapter on this. Actually, modular (or structured) programming was how they taught us to write COBOL back in the 1970's. Interesting to see it resurfacing.

-----Original Message-----
From: rpg400-l-bounces@xxxxxxxxxxxx
[mailto:rpg400-l-bounces@xxxxxxxxxxxx] On Behalf Of Wilt, Charles
Sent: Tuesday, April 25, 2006 1:18 PM
To: RPG programming on the AS400 / iSeries
Subject: Recommendations for Modular Coding HOWTO

All,

I'm trying to locate some reference materials to help my RPG III programmers get a better picture of how to code in a more modular fashion.

Materials with RPG IV examples would be great, but it seems most RPG IV reference material is geared toward syntax instead of application design.

Anybody have any favorites or know of training that focuses on the usage of RPG IV instead of the syntax.

Thanks,

Charles Wilt
--
iSeries Systems Administrator / Developer Mitsubishi Electric Automotive America
ph: 513-573-4343
fax: 513-398-1121


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