Re: Nested IF, OR and AND in /free

[Rory Hewitt <rory.hewitt@xxxxxxxxx>]

You could easily write separate IN procedures for character strings or
numeric values (although they obviously couldn't both be called 'IN'). Or,
with some 'trickery', write a single procedure that can cope with both (as
well as dates, times, timestamps etc.)...

On Wed, Nov 2, 2011 at 11:04 AM, John Yeung <gallium.arsenide@xxxxxxxxx>wrote:

> On Wed, Nov 2, 2011 at 11:53 AM, DeLong, Eric <EDeLong@xxxxxxxxxxxxxxx>
> wrote:
> > While not EXACTLY an "in list" function, for the example below, there is
> a hack...
> > If ( %scan(chk1 : '1|7|8|9') > 0 ) and chk6 <> '  '
>
> Nice!  The pipes serve both to make it clearer *and* to make it more
> flexible (compared to solutions based on %check, for example).  In
> this form, it even *looks* a bit like "if myvar in (val1, val2,
> val3)".
>
> I appreciate the concerns some may have that this is on the "clever"
> side, but I think it's just part of learning a language more fully.
> Once learned, a neat and compact idiom like this can be faster to read
> than a more verbose and cluttered one.  (Though nicer still would be
> for IBM to add direct support for an in-values construct.  Even if you
> like this %scan trick, it doesn't work for numeric values.)
>
> John
> --
> This is the RPG programming on the IBM i / System i (RPG400-L) mailing list
> To post a message email: RPG400-L@xxxxxxxxxxxx
> To subscribe, unsubscribe, or change list options,
> visit: http://lists.midrange.com/mailman/listinfo/rpg400-l
> or email: RPG400-L-request@xxxxxxxxxxxx
> Before posting, please take a moment to review the archives
> at http://archive.midrange.com/rpg400-l.