RE: Date compare Best Practices

They never move to RPGIV because they can't get 

EVAL USRDT = DBDATE * 10000.0001 

to work right! <gdr>

Eric DeLong
Sally Beauty Company
MIS-Project Manager (BSG)
940-898-7863 or ext. 1863



-----Original Message-----
From: Bob Cozzi [mailto:cozzi@xxxxxxxxx]
Sent: Thursday, February 26, 2004 4:59 PM
To: 'RPG programming on the AS400 / iSeries'
Subject: RE: Date compare Best Practices


The bigger question is why the hell are people not MOVING to RPG IV?
I just don't get it, I know about legacy code and not wanting to break it,
but if we're doing maintenance... why not convert it? 
The only reasoning I can think of is that there is an issue with skills.
-Bob


-----Original Message-----
From: rpg400-l-bounces@xxxxxxxxxxxx [mailto:rpg400-l-bounces@xxxxxxxxxxxx]
On Behalf Of DeLong, Eric
Sent: Thursday, February 26, 2004 4:50 PM
To: 'RPG programming on the AS400 / iSeries'
Subject: RE: Date compare Best Practices

Hmm?  The 10000.01 trick only works because RPG compilers before ILE don't
care if you truncate numeric digits.  I'd also question whether the RPGIII
community REALLY understands why this works.

Eric DeLong
Sally Beauty Company
MIS-Project Manager (BSG)
940-898-7863 or ext. 1863



-----Original Message-----
From: Booth Martin [mailto:Booth@xxxxxxxxxxxx]
Sent: Thursday, February 26, 2004 4:33 PM
To: rpg400-l@xxxxxxxxxxxx
Subject: Re: Date compare Best Practices


I am beginning to get a tad paranoid here.



What is wrong with the mult 10000.01 trick?  Obviously the entire RPG III
community already understands it.  Also, it works.  Documentation is is no
big deal because it is pretty much self-documenting.   



Just because the other lesser languages cannot rely on the values of their
numeric fields is no reason for us to back down and use inferior methods
like the hard-to-understand data structure tricks.  ;p

 

 

 

---------------------------------------------------------

Booth Martin   http://www.MartinVT.com

Booth@xxxxxxxxxxxx

---------------------------------------------------------

 

-------Original Message-------

 

From: RPG programming on the AS400 / iSeries

Date: 02/26/04 14:53:12

To: rpg400-l@xxxxxxxxxxxx

Subject: Re: Date compare Best Practices

 

Bob Cozzi wrote:

> There is nothing wrong with using the "MULT 10000.01" technique in RPGIII.
I

> do it every time I need to convert a date in that old language.

> If you use it in RPG IV, then you are right it is a questionable choice.

> The only other technique in RPG III is to use a data structure, but that
can

> be a bit more complex that the MULT. If you haven't seen it before then it

> doesn't matter which one you use because the person maintaining the code

> after you will have to deal with it, so just be sure to document it

> properly.

> -Bob

 

Well, once you factor in the necessary comments, moving DS subfields

still ends up as fewer source records. Not to mention 100-150 times

faster. But why use a clear and efficient programming technique when

there are some really cool ways (like that MULT trick) to show off your

programming prowess? ;-)

 

Cheers! Hans
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