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Denis Robitaille wrote: > I have seen a lot of discussion regarding the merit of dou and dow. I dont >want to start that discussion again but i want to share with you someting i >saw when i was in university. You just couldn't let it be, could you? <g> > > > In RPG, it could look like this > > C CLEAR x {loop init} > C Key SETLL File " " > > C DOL (new op code Do Loop) {loop begin} > > C READ File 55 {before loop test proc.} > > C DOTST *in55 = *off (new op code Loop test) {loop test} > > C EVAL x = x + 1 {after loop test proc.} > > C ENDDO {loop end} > How about: c SETOF 55 C KLST SETLL FILE C *IN55 DOWEQ *OFF (OR DOUEQ *ON) C READ FILE 55 C 55 LEAVE C (Other stuff) C ENDDO I too. learned the primed DOW loop method. Since LEAVE was introduced, this only has one read. In the real word, we don't mainline SETLL or READ operations, they are in a /COPY subroutine member. Our shop standard is to use indicator 90 for all failed CHAIN/READ operations and we have variables for "beyond next line" conditioning e.g. the two letter field name prefix for the customer master is "CM" so within the routine that performs the SETLL we also initialize fields CMANY, CMHIT and CMDONE to blanks. The READ routine uses all three, the CHAIN routine uses the CMHIT variable. (Originally we made all disk access into /COPY routines so they could be replaced with SQL if we wanted to) So in our case the above example would be: C EXSR CMSET C CMDONE DOWNE 'Y' C EXSR CMREAD C 90 LEAVE C (other stuff) C ENDDO We could get rid of the left hand indicator by doing a IF, but being the lazy type that we are we prey to the compiler gods for a X IFNE Y LEAVE construct some day <G> On bended knee, tossing my 2 cents in. +--- | This is the Midrange System Mailing List! | To submit a new message, send your mail to MIDRANGE-L@midrange.com. | To unsubscribe from this list send email to MIDRANGE-L-UNSUB@midrange.com. | Questions should be directed to the list owner/operator: david@midrange.com +---
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