RE: %Trim dilemma

["Wilt, Charles" <CWilt@xxxxxxxxxxxx>]

Here's a thought...

*ALL'9' means 9's for the length of the field.

If the field length is 0, how many 9's do you get?  Zero.

So the expression ends up comparing the null string to the null string
which is indeed equal.

HTH,


Charles Wilt
--
iSeries Systems Administrator / Developer
Mitsubishi Electric Automotive America
ph: 513-573-4343
fax: 513-398-1121
  

> -----Original Message-----
> From: rpg400-l-bounces@xxxxxxxxxxxx 
> [mailto:rpg400-l-bounces@xxxxxxxxxxxx] On Behalf Of Ellsberry, Steve
> Sent: Friday, January 27, 2006 1:45 PM
> To: 'RPG List'
> Subject: %Trim dilemma
> 
> Hey guys,
>  
> Maybe someone can explain this one to me.  
>  
> >From the statements below you can see that WSSIMN is defined 
> as 20 bytes
> alpha. When the program using this field runs and if WSSIMN 
> is blank the
> statement tests as true and all statements within the if 
> group are executed.
> The idea behind the statement is to allow a "dummy" serial number that
> equals '99999999999999999999' to be used for internal 
> testing.  Obviously
> the developer can get around it by testing for <> to blank 
> prior to the
> %Trim test but my concern is we may have other programs in 
> the field that
> are doing the same thing. 
>  
> Any ideas on why this would test true if Wssimn is blank? If 
> %TRIM removes
> leading and trailing blanks and if the entire field is blank, 
> what's being
> compared? 
>  
>  
> D  WSSIMN                        20A                          
>               
>  
> C          If      %Trim(Wssimn) = *All'9'
>  
>  
>  
>  
>  
>  
> -- 
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