John Cowan wrote:
I still wish I didn't want to reach for number-seq-pairwise?
instead of a more generic seq-pairwise? but Scheme lacks any
good way to write seq-pairwise?.   That seems like a hard,
interesting problem.

If seq-pairwise? takes a binary order predicate as an argument
as well as the sequence being tested, I think it's straightforward.

Unless you believe that  (seq-pairwise? <  #\a)
should produce an error (wrong type argument)
while (seq-pairwise? char<? #\a) should return #t.

-t


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