Re: RPG Error or ?

Good explanation. So, if you want to look at '' then it's best to replace
if string > '';
with
if %len(string)>0;
or
if string > *allX'00';


Rob Berendt
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From: Luis Rodriguez <luisro58@xxxxxxxxx>
To: "RPG programming on the IBM i / System i" <rpg400-l@xxxxxxxxxxxx>
Date: 10/11/2011 10:33 AM
Subject: Re: RPG Error or ?
Sent by: rpg400-l-bounces@xxxxxxxxxxxx



Henrik,

As I see it, it's working as designed. As per my V5R3 RPGLE Reference
manual:

If character, graphic, or UCS-2 fields are compared, fields of unequal
length are aligned to their leftmost character. The shorter field is
filled
with blanks to equal the length of the longer field so that the field
lengths are equal for comparison.

So your '' gets converted to, say, 5 chars (X'40) and, if the first
characters in "string" are x'0515' or x'4015' the are, of course, less in
"weigth" than the X'4040' it would find in the string at the right of the
'>'

Hope it makes sense :-)

Regards,


Luis Rodriguez
IBM Certified Systems Expert — eServer i5 iSeries
--



On Tue, Oct 11, 2011 at 9:20 AM, Henrik Rützou <hr@xxxxxxxxxxxx> wrote:

Is it me that has misunderstood something or what would you expect
displayed from this code:

d string s 52a varying

string = x'0515' + 'abc';
or
string = x'4015' + 'abc';

// dosn't work (but works if x'4040' + 'abc')
if string > '';
dsply 'hello 1';
endif;

// works
if string <> '';
dsply 'hello 1';
endif;

// works
if %len(string) > 0;
dsply 'hello 2';
endif;


--
Regards,
Henrik Rützou

http://powerEXT.com <http://powerext.com/> <http://powerext.com/> <

http://powerext.com/>
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