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From: "B. Pym" <Nobody447095@here-nor-there.org>
Newsgroups: comp.lang.lisp,comp.lang.scheme
Subject: Re: A Long Piece Of Lisp Code
Date: Tue, 17 Sep 2024 11:11:51 -0000 (UTC)
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> (defun split-if (fn lst)
>   (let ((acc nil))
>     (do ((src lst (cdr src)))
>         ((or (null src) (funcall fn (car src)))
>          (values (nreverse acc) src))
>       (push (car src) acc))))

Scheme

(define (split-if fn lst)
  (do ((src lst (cdr src))
       (acc '() (cons (car src) acc)))
    ((or (null? src) (fn (car src)))
     (values (reverse acc) src))))

(split-if odd? '(0 2 4 5 7))
  ===>
(0 2 4)
(5 7)

(split-if odd? '(0 2 4 52 70))
  ===>
(0 2 4 52 70)
()

(split-if odd? '(3 0 2 4 52 70))
  ===>
()
(3 0 2 4 52 70)