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On 11/6/20 3:07 AM, Joep Beckeringh wrote:
I don't think I have used every feature of RPG, but I have used
primary and secondary files, matching records and look-ahead fields.
And no, I am not using them anymore.
I've never even figured out *how* to use a secondary file, and I'm not
entirely sure what "matching records" and "look-ahead fields" are, at
least in an RPG context (then again, a quarter century ago, when I was
interviewed for my present position, I had no idea what a "logical file"
was, at least in an IBM Midrange context; my best guess at the time
corresponded more to a "member").
But when I saw that I could, just by specifying it in a file
declaration, tell a program to "read every record of the file and
execute the main for it," I immediately realized that this was something
I could use a dozen different ways. And when I realized that modern
interactive programs (and some non-interactive ones) typically run in an
event-loop, and I could use The Cycle as an event-loop just by slaving
LR to whatever event(s) signaled that it was "time to quit," I realized
that it had at least one use that was largely untapped.
--
JHHL
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