Re: Using an Expression to control a FOR loop

[Tom Liotta <qsrvbas@xxxxxxxxxxxx>]

Arthur Marino wrote:

> Now that it's been pointed out to me that the entire FOR expression is
> evaluated at the 'endfor' (I thought it was evaluated once and just
> tested at 'endfor'), I see why it didn't work at first. I still like
> Terry's solution 'cause it's fewer instructions than mine and 123
> correctly becomes 00123.
>
> coldta = %subst( '000000000000000'  // "lots" of zeros
>                      : 1
>                      : cwdth( #col ) - %len( coldta )
>                      ) + coldta;

Arthur:

But don't forget the [if %len( coldta ) < cwdth( #col );/endif;] 
that Terry originally supplied. If the value in coldta is already 
'00123' and [cwdth( #col )=5], the "IF" will save you. Also, if 
coldta='12345', then you can't add leading zeroes. Further, be sure 
that the length of coldta matches the number of characters in its value.

It seems as if you're receiving external data and massaging it. Be 
sure that it's properly clean for your technique.

Tom Liotta