RE: How to reconcile conflicting array documentation

[<Rick.Chevalier@xxxxxxxxxxxxxxx>]

Booth,

I thought of doing something like this but how do you handle lookup?
 

-----Original Message-----
From: rpg400-l-bounces@xxxxxxxxxxxx
[mailto:rpg400-l-bounces@xxxxxxxxxxxx] On Behalf Of Booth Martin
Sent: Monday, October 15, 2007 3:04 PM
To: RPG programming on the AS400 / iSeries
Subject: Re: How to reconcile conflicting array documentation

Here's some code I use to avoid using the ALT keyword:
D                 ds                                               
D aArray                              dim(1200)                    
D aName                               like( NAME ) overlay(aArray) 
D aCity                               like( CITY )                 
D                                     overlay( aArray: *next)      
D aAge                                like( AGE )                  
D                                     overlay( aArray: *next) inz  
D aPhone                              like( PHONE )                
D                                     overlay( aArray: *next) inz  

Rick.Chevalier@xxxxxxxxxxxxxxx wrote:
> I'm trying to add a prerun-time array to a program for the first time 
> in many years.  After looking up the the nuances for a prerun-time 
> array I added the appropriate F and D specs.  That's where the trouble

> began.  I need to add an alternating array which it sounds like I can 
> do from the documentation on coding a prerun-time array shown below 
> from the RPG Reference manual.  However, the ALT keyword doesn't play 
> nice with the other keywords I need, specifically FROMFILE.  The ALT 
> keyword documentation specifically says it cannot be used with
FROMFILE.
>  
> Am I missing something? 
>  
> Coding a Prerun-Time Array In addition to the essential array 
> specifications, you can also code the following specifications or 
> keywords for prerun-time arrays. On the definition specifications, you

> can specify v The name of the file with the array input data, using 
> the FROMFILE keyword. v The name of a file to which the array is 
> written at the end of the program, using the TOFILE keyword. v The 
> number of elements per input record, using the PERRCD keyword. v The 
> external format of numeric array data using the EXTFMT keyword. v An 
> alternating format using the ALT keyword.
>
> ALT(array_name) The ALT keyword is used to indicate that the 
> compile-time or pre-runtime array or table is in alternating format. 
> The array defined with the ALT keyword is the alternating array and 
> the array name specified as the parameter is the main array. The 
> alternate array definition may precede or follow the main array 
> definition. The keywords on the main array define the loading for both

> arrays. The initialization data is in alternating order, beginning 
> with the main array, as follows: main/alt/main/alt/... In the 
> alternate array definition, the PERRCD, FROMFILE, TOFILE, and CTDATA 
> keywords are not valid.
>
>  
>
> Rick Chevalier
>
> AmeriCredit ITS
>
> 817-525-7178
>
>  
>
>
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