RE: Dynamic arrays

[Joel Fritz <JFritz@xxxxxxxxxxxxxxxx>]

I've never done this in RPG, but, if I remember correctly, you need to
dimension an array of arbitrary size based on a pointer and allocate storage
to the pointer.  When you need to change the size of the array, you need to
park the data and reallocate storage for it.  I've never done it because: 1.
I'm lazy, 2. I've haven't run across a situation that really cried for it,
although I'm sure one will come up.  I'll admit it, I waste memory.  

There's also the linked list option, or much scarier, some sort of tree
structure.  

-----Original Message-----
From: lgoodbar@watervalley.net [mailto:lgoodbar@watervalley.net]
Sent: Thursday, April 29, 1999 4:51 PM
To: midrange-l@midrange.com
Subject: Dynamic arrays


I have a work file (about 50 records) that is accessed very often by a RPG4
program. I was thinking about reading the file into an array to make lookups
faster. The problem is the file changes in size; sometimes it's 50 records,
sometimes 60, or 40, etc. I'd like to create a dynamically-sized array at
runtime. I briefly looked at the ALLOC/DEALLOC/REALLOC opcodes, but they
really didn't make much sense.

Is there a relatively easy way of creating dynamic arrays in RPG, or am I
forced to create an arbitrary upper limit?

Thanks,
Loyd

--  
"If we wanted more leisure, we'd invent machines
 that do things less efficiently." --Calvin & Hobbes
lgoodbar@watervalley.net  ICQ#504581
http://www.watervalley.net/users/lgoodbar/
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