RE: DS Array

I'm not sure I'm understanding the concern. But I'll do my best to help out.

I don't use Occurs(), but I'm guessing that if you go beyond the defined occurrences, or go to 0, you'll get an error, correct? Same thing with an array (regardless if it's a DS array or a field array).

I never tried it, but if it's as you say, and you can eval array(0) and get a result in debug (likely default values?), understand that this will cause a runtime error in RPG. (Sorry, kind of repeated myself there).

I prefer arrays because every reference to an array element is explicit to which element you're referring to (thus easier to debug). Also, you can compare one element of the array to another element.

I hope this answered your question,
Kurt Anderson


-----Original Message-----
From: rpg400-l-bounces@xxxxxxxxxxxx [mailto:rpg400-l-bounces@xxxxxxxxxxxx] On Behalf Of David FOXWELL
Sent: Tuesday, November 04, 2008 8:44 AM
To: RPG programming on the AS400 / iSeries
Subject: DS Array

Hi,

I've been playing with a DS defined with DIM as opposed to OCCURS for the first time.

I noticed while debugging that if I type EVAL MyDS I see all the elements from 1 to the last. As it happens I have 10 elements. But I can type EVAL MyDS(0) or EVAL MyDS(100000) or any other number as the element number. I suppose thes elements are also available to the program, so whats the point of stating DIM(10) on my DS specs and controlling that I don't try and put more than 10 rows in it?

What's happening?

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