rotten news relay - comp.lang.scheme - Re: Multivalue tail recursion?

Subject: Re: Multivalue tail recursion?
From: B. Pym
Newsgroups: comp.lang.lisp, comp.lang.scheme
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Date: Tue, 27 Aug 2024 22:19 UTC

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From: Nobody447095@here-nor-there.org (B. Pym)
Newsgroups: comp.lang.lisp,comp.lang.scheme
Subject: Re: Multivalue tail recursion?
Date: Tue, 27 Aug 2024 22:19:41 -0000 (UTC)
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Kent M. Pitman wrote:

>
> (loop for x in '(3 5 7)
> for y in '(2 5 8)
> when (= x y)
> collect (cons x y))

What if there were more than two lists?
This will handle any number of lists:

Scheme:

(filter-map
(lambda xs (and (apply = xs) xs))
'(0 3 5 7 9)
'(0 2 5.0 8 9.0)
'(2 4 5 8 9))

((5 5.0 5) (9 9.0 9))

Subject	Author
Re: Multivalue tail recursion?	B. Pym

BOFH excuse #347: The rubber band broke

comp / comp.lang.scheme / Re: Multivalue tail recursion?