RE: Using an Expression to control a FOR loop -- RPG400-L

Hi Arthur, here's yet another attempt to prevent you from using the For loop! I have nothing against using the For loop, but it seemed like a challenge to come up with a way to do it w/o the loop.

ColDta = %Editc(%Dec(%Trim(ColDta):LEN_Max: DECPOS_Max):'X');
startPos = LEN_Max - cwdth(#col) + 1; // separated out for clarity
ColDta = %subst( ColDta: startPos );

-----Original Message-----
From: rpg400-l-bounces@xxxxxxxxxxxx [mailto:rpg400-l-bounces@xxxxxxxxxxxx] On Behalf Of Alan Campin
Sent: Wednesday, March 25, 2009 10:54 AM
To: RPG programming on the IBM i / System i
Subject: Re: Using an Expression to control a FOR loop

Would a %Trim fix that problem? The %Dec could be the largest value or a
%Int.The only thing you would have to protect against is a blank.

ColDta = %Editc(%Dec(%Trim(ColDta):5:0):'X');

On Wed, Mar 25, 2009 at 9:33 AM, Arthur Marino <amarino@xxxxxxxxxxxx> wrote:

Because, as I seem to remember, you can't specify a variable as either
of the last 2 parameters in the %dec BIF. And the length (actually max
width) of each of the columns is determined only after passing thru the
.csv file once to interpret the attributes (max width, #of decimals,
etc.) of each column.

Or am I wrong about the last 2 parms of %dec?

Arthur J. Marino
RockTenn Corporation
(631) 297-2276

-----Original Message-----
From: rpg400-l-bounces@xxxxxxxxxxxx
[mailto:rpg400-l-bounces@xxxxxxxxxxxx] On Behalf Of Alan Campin
Sent: Wednesday, March 25, 2009 11:23 AM
To: RPG programming on the IBM i / System i
Subject: Re: Using an Expression to control a FOR loop

Why not simply use a %EditC?

ColDta = %EditC(%Dec(COLDTA:5:0):'X');

On Wed, Mar 25, 2009 at 9:01 AM, Arthur Marino <amarino@xxxxxxxxxxxx>
wrote:

This FOR loop is supposed to prefix the 'varying' character field
"coldta" with zeros so as to right-justify the value in the column's
defined field length. "i" is defined as 5i 0.

for i = 1 to (cwdth(#col)-%len(coldta));
coldta = '0' + coldta;
endfor;

Debug tells me:
cwdth(#col) = 5 (the column's defined field length)
coldta = '134' (%len(coldta)=3, I inserted an explicit calc to be

sure)

"coldta" should wind up being '00134'.

I expect the loop to iterate twice (5 - 3). Yet, it does so only ONCE.
After the 'endfor' i = 2, not 3 as I'd expect, and coldta contains

0134

(only 4 bytes).

When I insert the calc "len = cwdth(#col)-%len(coldta);" and replace

the

expression with "for i = 1 to len", it iterates twice, i = 3 after the
'endfor', and coldta=00134 (5 bytes).

Is there something I'm not getting about the evaluation of the
expression in the FOR loop? It certainly appears that 5 - 3 results in
1, not 2.

Thanks.

Arthur Marino

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communication within the meaning of the Electronic Communications Privacy
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RockTenn, and disclosure is strictly limited to recipients intended by the
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constitute an offer, acceptance, or agreement of any kind. This message may
contain confidential attorney-client privileged information and attorney
work product. If you are not the intended recipient, or responsible for
delivering e-mail to the intended recipient, you are advised that use,
dissemination, forwarding, printing, or copying of this message is STRICTLY
PROHIBITED. If you receive this message in error, please notify the sender
immediately by return e-mail and delete the message entirely from your
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