Not the question you asked, but...
sort_stem = 'index.'
call sort 6, ??? (see comments after code)
/* Sort sort_stem using combsort */
sort: procedure,
expose (sort_stem)
arg key_start, key_length
size = value(sort_stem'0')
gap = size
do until switches = 0 & gap = 1
gap = gap % 1.3
select
when gap = 0 then gap = 1
when gap = 9 then gap = 11
when gap = 10 then gap = 11
otherwise
end
switches = 0
do i = 1 to (size - gap)
j = i + gap
if substr(value(sort_stem'i'), key_start, key_length) >,
substr(value(sort_stem'j'), key_start, key_length) then do
/* swap the entries */
hold = value(sort_stem'i') /* hold = stem.i */
x = value(sort_stem'i', value(sort_stem'j')) /* stem.i = stem.j */
x = value(sort_stem'j', hold) /* stem.j = hold */
switches = switches + 1
end
end
end
return
The problem is that as written, the code expects the key_length to be the same
across all elements of the stem. If yours are variable length then the code
will need to be adjusted. Maybe in your case it would need to be comparing
subwords instead of substr.
-----Original Message-----
From: IBM Mainframe Discussion List <[email protected]> On Behalf Of
Charles Mills
Sent: Wednesday, March 6, 2024 6:10 PM
To: [email protected]
Subject: What am I doing wrong with BPXWUNIX sort?
I am trying to sort a Rexx "array" starting with the second "word" of the
variables. My "array" is in Index.n and contains records of the form <nnnn some
descriptive string> where nnnn is 0001, 0002, 0003, etc. and string is 2 to 5
Rexx "words."
Here's my Rexx code:
Say "Before sort" Index.0 Index.1 Index.2 Index.3
stdout.0 = 0
stderr.0 = 0
Call BPXWUNIX "/bin/sort -k2",Index.,Index.,stderr.
Do i = 1 to stderr.0
Say "Sort error:" stderr.i
End i
Say "After sort" Index.0 Index.1 Index.2 Index.3
And here is the output:
Before sort 8 0001 Main Check 0002 OMVS (FTP Session) 0003 C Validation
After sort 8 0001 Main Check 0002 OMVS (FTP Session) 0003 C Validation
My expectation is that -k2 would have caused sort to sort on the "descriptive
strings" (ignoring the nnnn) but obviously that is not what has happened. What
am I doing wrong? (I have tried both -k2 and -k 2, and also -k1 and +1 -- all
with the same results.)
Thanks,
Charles
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