× The internal search function is temporarily non-functional. The current search engine is no longer viable and we are researching alternatives.
As a stop gap measure, we are using Google's custom search engine service.
If you know of an easy to use, open source, search engine ... please contact support@midrange.com.




Encapsulation is a good thing.

Indeed. As a general rule, return a pointer to the program to the structure
which is managed by the service program itself (i.e. allocated and destroyed).
The program only knows about the pointer, it knows nothing about the internal
structure. Then pass this pointer as the first argument to procedures
"GetNextCustomer", "GetParentCustomer". And if you put all the code like this
that belongs to the Customer entity into one well-named serviceprogram then
we even have a bit of OO here.


Subject: RE: link list returned from service program
Date: Wed, 12 Mar 2008 08:17:19 -0400
From: WiltC@xxxxxxxxxx
To: rpg400-l@xxxxxxxxxxxx

Actually, I take back what I said a minute ago about your idea being reasonable.

Is there any reason for actually passing back the linked list?

You could easily keep the link list implementation hidden, and just expose procedures like
GetNextCustomer(), GetParentCustomer() that would allow the callers of the service program access to
the data while hiding the fact you're using a linked list.

Encapsulation is a good thing.

Charles Wilt
Software Engineer
CINTAS Corporation - IT 92B
513.701.1307

wiltc@xxxxxxxxxx


-----Original Message-----
From: rpg400-l-bounces@xxxxxxxxxxxx [mailto:rpg400-l-bounces@xxxxxxxxxxxx]
On Behalf Of Lim Hock-Chai
Sent: Tuesday, March 11, 2008 6:00 PM
To: RPG programming on the AS400 / iSeries
Subject: RE: link list returned from service program

To create customer family tree. Our customer master file has customer
number field and parent customer number field. Every now and then, we
need to know all the descendants of a customer number. So..., I created
a export procedure that accept a customer number as a parameter. It
will return the caller a link list that represent the customer's family
tree.




-----Original Message-----
From: rpg400-l-bounces@xxxxxxxxxxxx
[mailto:rpg400-l-bounces@xxxxxxxxxxxx] On Behalf Of Alan Campin
Sent: Tuesday, March 11, 2008 4:48 PM
To: rpg400-l@xxxxxxxxxxxx
Subject: Re: link list returned from service program



Lim Hock-Chai wrote:
I'm just curious to know if I've an export procedure that returns a
link list to the caller, how safe is it to continue to use the link
list after the service program is destroyed from the activation group?



I have to ask. Why are you returning a linked list from a service
program?

--
This is the RPG programming on the AS400 / iSeries (RPG400-L) mailing
list To post a message email: RPG400-L@xxxxxxxxxxxx To subscribe,
unsubscribe, or change list options,
visit: http://lists.midrange.com/mailman/listinfo/rpg400-l
or email: RPG400-L-request@xxxxxxxxxxxx
Before posting, please take a moment to review the archives at
http://archive.midrange.com/rpg400-l.

--
This is the RPG programming on the AS400 / iSeries (RPG400-L) mailing list
To post a message email: RPG400-L@xxxxxxxxxxxx
To subscribe, unsubscribe, or change list options,
visit: http://lists.midrange.com/mailman/listinfo/rpg400-l
or email: RPG400-L-request@xxxxxxxxxxxx
Before posting, please take a moment to review the archives
at http://archive.midrange.com/rpg400-l.




This e-mail transmission contains information that is intended to be confidential and privileged. If you receive this e-mail and you are not a named addressee you are hereby notified that you are not authorized to read, print, retain, copy or disseminate this communication without the consent of the sender and that doing so is prohibited and may be unlawful. Please reply to the message immediately by informing the sender that the message was misdirected. After replying, please delete and otherwise erase it and any attachments from your computer system. Your assistance in correcting this error is appreciated.
--
This is the RPG programming on the AS400 / iSeries (RPG400-L) mailing list
To post a message email: RPG400-L@xxxxxxxxxxxx
To subscribe, unsubscribe, or change list options,
visit: http://lists.midrange.com/mailman/listinfo/rpg400-l
or email: RPG400-L-request@xxxxxxxxxxxx
Before posting, please take a moment to review the archives
at http://archive.midrange.com/rpg400-l.


_________________________________________________________________
Jouw nieuws en entertainment, vind je op MSN.nl!
http://nl.msn.com/

As an Amazon Associate we earn from qualifying purchases.

This thread ...

Follow-Ups:
Replies:

Follow On AppleNews
Return to Archive home page | Return to MIDRANGE.COM home page

This mailing list archive is Copyright 1997-2024 by midrange.com and David Gibbs as a compilation work. Use of the archive is restricted to research of a business or technical nature. Any other uses are prohibited. Full details are available on our policy page. If you have questions about this, please contact [javascript protected email address].

Operating expenses for this site are earned using the Amazon Associate program and Google Adsense.