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
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6928N 400E
Kendallville, IN 46755
http://www.dekko.com


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