Re: Clear entire field vs substring

Clearing the substring does exactly that...clears the data from those
positions in the variable. IF there is data beyond that substring it WILL
not be cleared. So unless you are ok with potentially "left-over" data
clear the entire field and not just a substring. If you are only wanting
to clear the existing data, just clear the field and forget substring. Why
add overhead/complexity where it simply isn't needed?





From: Albert York <alfromme@xxxxxxxxx>
To: "RPG programming on the IBM i / System i" <rpg400-l@xxxxxxxxxxxx>,

Date: 05/21/2012 02:57 PM
Subject: Re: Clear entire field vs substring
Sent by: rpg400-l-bounces@xxxxxxxxxxxx



I guess I didn't make myself clear.

Forgetting the details, is it better to clear an entire field or to
clear a subscripted portion of the field. Which incurs more overhead?

Thanks,

Albert

On Mon, May 21, 2012 at 12:16 PM, Vern Hamberg <vhamberg@xxxxxxxxxxx>
wrote:

I thought simply assigning the value to the variable did the blanking
out first - this isn't a MOVE or MOVEL, which are different.

Is workfield a varying-length field? Then all you need to do is this -

workfield = %trimr(Newdata);

HTH - and that I'm right, cuz I hardly ever initialize, then assign

anymore!

Vern

On 5/21/2012 2:09 PM, Albert York wrote:

I have a work field that is 2000 bytes (to allow for the longest

possible string value). The length of the data being moved to it varies
and can be quite short. I have to clear the work field before I move the
data.

Which is better:

workfield = *blanks


len = %len(%trimr(Newdata));
%substr(workfield:1:len) = *blanks;

Thanks,

Albert

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