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From: "B. Pym" <Nobody447095@here-nor-there.org>
Newsgroups: comp.lang.lisp
Subject: Re: The LOOP macro
Date: Mon, 5 Aug 2024 04:53:00 -0000 (UTC)
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> > > Do you have a good example of LOOP's power / flexibility that doesn't
> > > need much surrounding context to understand?
> >
> > Here are a few:
> >
> >   (loop repeat 100 collect (random 10))


newLISP

(collect (rand 10) 100)



> >   (loop for x across array-of-numbers
> >         minimizing x into min
> >         maximizing x into max
> >         summing x into total
> >         counting t into count
> >         finally (return (list min max (/ total count))))


(define array-of-numbers (array 9 '(2 -2 0 9 7 8 3 4 3)))

(local (mx mn total cnt)
  (dolist (n array-of-numbers)
    (setq mx (max (or mx n) n))
    (setq mn (min (or mn n) n))
    (++ total n)
    (++ cnt))
  (list mn mx (div total cnt)))

(-2 9 3.777777777777778)

Another way:

(list (apply min array-of-numbers)
      (apply max array-of-numbers)
      (div (apply + array-of-numbers) (length array-of-numbers)))