× 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.



Rob,
In a nutshell...
QSORT is much faster than the SORTA opcode--provided your compare routine
(call back) is efficient.
The QlgSort and QlgSRTIO APIs may be faster than QSORT but I'm not sure that
the extra complexity is what you want.


-Bob Cozzi
www.RPGxTools.com
RPG xTools - Enjoy programming again.


-----Original Message-----
From: rpg400-l-bounces@xxxxxxxxxxxx [mailto:rpg400-l-bounces@xxxxxxxxxxxx]
On Behalf Of Rick.Chevalier@xxxxxxxxxxxxxxx
Sent: Tuesday, September 13, 2005 1:49 PM
To: rpg400-l@xxxxxxxxxxxx
Subject: RE: Sorting a user space


Rob,

It may be a matter of preference but I would suggest using QSORT. 

I recently wrote an application with a subfile of customer payment history.
Some of the history runs into hundreds of records.  The subfile can be
sorted on any of about five different columns.  I'm not sure if I even
figured out how to solve it using an array and a user index would have to be
rebuilt for every sort.  The way I handled it is when the subfile is loaded
I also load each record into a user space.  When the user requests a sort a
procedure determines which column to sort on and calls QSORT.  There is an
additional procedure to handle the actual high, low, equal logic for QSORT.
The entries are then read from the user space back into the subfile.  Very
fast and simple.

If you are only sorting on one value the array approach would work just
fine.  I'm now a believer in using QSORT when there could be varying sort
criteria.

Rick

-----Original Message-----
From: rpg400-l-bounces@xxxxxxxxxxxx
[mailto:rpg400-l-bounces@xxxxxxxxxxxx]On Behalf Of rob@xxxxxxxxx
Sent: Tuesday, September 13, 2005 1:34 PM
To: RPG programming on the AS400 / iSeries
Subject: RE: Sorting a user space


I don't see how that would be any easier, or more effective.

Rob Berendt
--
Group Dekko Services, LLC
Dept 01.073
PO Box 2000
Dock 108
6928N 400E
Kendallville, IN 46755
http://www.dekko.com


Privileged and Confidential.  This e-mail, and any attachments there to, is
intended only for use by the addressee(s) named herein and may contain
privileged or confidential information.  If you have received this e-mail in
error, please notify me immediately by a return e-mail and delete this
e-mail.  You are hereby notified that any dissemination, distribution or
copying of this e-mail and/or any attachments thereto, is strictly
prohibited.


As an Amazon Associate we earn from qualifying purchases.

This thread ...

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 copyright@midrange.com.

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