Re: Multi-field dynamic array (Booth Martin)

On 1/11/06, Grizzly M <grizzlym@xxxxxxxxxxxxxxxxxxxxx> wrote:
>
> 2) I don't know what's going to be enough elements, but being able to
> change the dimension as needed allows me to answer that question with "I
> don't care how many elements will be needed".
> More than anything else I just want to know how to do it.


Basically, with RPG arrays, you bump your head on the 64k limit.

To create an "array" that is dynamic, with no other limits excepting system
resources, you would have to use a pointer, and the ALLOC() API to allocate
memory to that pointer.  You would have to create a BASED DS, based on a
pointer, that you would walk through the allocated memory, to add new
elements, track the number of elements, and use the qsort() and bsearch()
APIs to simulate a %LOOKUP operation.  You would have to create the program
using STGMDL(*TERASPACE) option, and I believe you could expand your DS
"array" to own the entire system.

I have learned about this technique, and seen examples in the sorcerer's
guide, but I have never written one in production.  Maybe somebody has an
actual example they can share.

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