Re: Parameters vs. Data Structure?

["Rick Rayburn" <the400man@xxxxxxxxxxx>]

but is there any performance issue with 55 pointers at once? forget the
program and maintenance factors for a minute...will it jeopardize the
execution of the order entry program?

thanx much,

rick



> From: Dr Syd Nicholson <sydnic@ccs400.com>
> Reply-To: midrange-l@midrange.com
> To: midrange-l@midrange.com
> Subject: Re: Parameters vs. Data Structure?
> Date: Sat, 28 Sep 2002 02:52:09 +0100
>
> Programming is probably easier with a data structure and pass the data
> structure as a single parameter. Program maintenance would be difficult
> and messy if the PLIST or prototype contained a large number of
> parameter entries. This is also an area where bugs in the program could
> creep in if someone specified a wrong parameter.
>
> There are other posiblities/variations -
>
> create a service program that only contains your variables, specified
> with the keyword EXPORT. You can now access to all these variables from
> any program/procedure in the activation group without needing to pass
> them as parameters. This service program is a kind of 'blackboard' to
> which you read and write data. Perhaps this service program could also
> contain some procedures for manipulating this data - an object oriented
> approach to RPG?
>
> or - Make your data structure based on a pointer, and pass the pointer
> as a parameter.
>
> or - Use a fixed or variable length string and pass this a parameter.
> Use concatenation and %SUBST to construct and breakdown the information.
>
> or - Use a data area to share information between programs
>
> Syd
>
>
>
> Rick Rayburn wrote:
>
> > Hello there everybody -
> >
> > Got a program calling another program with 55 parameters being passed
> > between each...all really needed...some for input only, most for
> > returnage
> > of data. Can anyone lend some expertise to these queries?
> >
> > 1. any NOTICEABLE performance issues here...it is an order entry
> > application...program would be called maximum twice for each order.
> >
> > 2. would I be better served with 1 field being passed and then split
> > into a
> > 55 field data structure upon entry/re-entry?
> >
> > Thanks much people.
> >
> > Rick Rayburn
> > NYC
> >
> >
> >
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