Re: SCAN in RPG

Jim wrote:
>Just to add another solution with %scan here.
>I spent many hours reading/debugging this thread, and 2 diff rpg iv books,
>and ibm reference manual (none of the books had a
>decent example beyond scanning for a constant, like  'XYZ')
>Had my own scanning problem with data fields, but am
>using a tool that gens the rpg, and it will only gen %scan!
>
>the following line works  (at v4r4)
>C                   EVAL      Pos=%scan(%trim(lib): string:1)
>but the following will NOT work
>C                   EVAL      lib = %trim(lib)
>C                   EVAL      Pos=%scan(lib: string:1)

The two code fragments should work exactly the same
IF variable "lib" is declared as VARYING.

If "lib" is a fixed length string, then the statement
"lib=%trim(lib)" would only have the effect of removing
left-most blanks.  The %TRIM function removes blanks
from both ends, but the assignment pads the rest of the
variable with blanks.

The bottom line is this:  It is best to use varying
length character variables for general character string
manipulation (such as this).

Cheers!  Hans

Hans Boldt, ILE RPG Development, IBM Toronto Lab, boldt@ca.ibm.com

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