Re: Efficient validation of array contents

Pete, have you looked into using the %LookUp BIF?  The result of the
%LookUp returns 0 when it doesn't find that value in the Array, otherwise,
it returns the element it was found in.

Michael Schutte



                                                                           
             Pete Helgren                                                  
             <Pete@xxxxxxxxxx>                                             
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             05/05/2006 01:53                                      Subject 
             AM                        Efficient validation of array       
                                       contents                            
                                                                           
             Please respond to                                             
              RPG programming                                              
              on the AS400 /                                               
                  iSeries                                                  
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I have a set of five values that come in from a prompt screen that can
be from 1 to 5 and can only occur once.  That is, if a value is entered
(not 0) , it must be a value from 1 to 5 and there cannot be duplicate
values.

The fields are loaded into an array:

     DUDFS             DS
     D  FTSUDF1                       1S 0
     D  FTSUDF2                       1S 0
     D  FTSUDF3                       1S 0
     D  FTSUDF4                       1S 0
     D  FTSUDF5                       1S 0
     D  UDF                                Like(FTSUDF1) Dim(5)
     D                                     overlay(UDFS)

and then I loop through them:

          for LoopCount =  1 to 5;
            if UDF(LoopCount) <> 0;
             // Check to make sure the value is between 1 and 5
                if UDF(LoopCount) > 5;
                      //Error occurs
                endif;
             // Check to make sure the number only occurs once
                ??
            endif;
         endfor;

I can't think of an easy way to check the occurrence of the number in
the array.  The brain is just a wee bit stretched tonight.

A quick solution?

Thanks,

Pete Helgren

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