First off let me say that I've done a search and have come up with a lot of posts that almost what I'm looking for. I also have no previous Rexx knowledge but I'm trying to learn as I go along.
In our shop, we have a batch job that uses an assembler routine (written many years ago) that changes the dates (gregorian format) in control cards based on the current system date. Based on the date, it can update the control cards for current date, next business date, first business day of the month, last business day of the month and a weekly range. The library of control cards is huge around 2,000 + members.
The assembler looks for certain symobls/formats within the control cards to determine what to change it to.
If it encounters:
?M?D?Y it knows to replace with current date 030209.
>M>D>Y<M<D<Y it knows to replace the 1st >M>D>Y with that week's Monday date and <M<D<Y with that weeks Friday date.
+M+D+Y it knows to replace to next business date.
@M@D@Y¢M¢D¢Y it know to replace
@M@D@Y with the last business day of the month ex. 022709
¢M¢D¢Y with the 1st business day of the month ex. 020209
I am looking to see how we can do this in REXX. I've seen various rexx date routines but since my familiarity with rexx is minimal I would like to see if anyone thinks this is possible and the best way to go about it.
Joined: 26 Apr 2004 Posts: 4650 Location: Raleigh, NC, USA
Seems pretty straight-forward. If you convert the dates to the Base date format DATE(B) you can easily move forward and backward through dates mathematically. Once you've determined the proper date, you can convert it from the base date format back into the gregorian format.