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BOFH excuse #398: Data for intranet got routed through the extranet and landed on the internet.

Subject: Two at a time
From: B. Pym
Newsgroups: comp.lang.lisp
Organization: A noiseless patient Spider
Date: Sun, 18 Aug 2024 21:17 UTC

Path: eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail
From: Nobody447095@here-nor-there.org (B. Pym)
Newsgroups: comp.lang.lisp
Subject: Two at a time
Date: Sun, 18 Aug 2024 21:17:56 -0000 (UTC)
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> From a list of item '(joe barney cathy kevin stephy ...) I
> want a formated output like this:
>
> joe barney
> cathy kevin
> stephy ...
> ...
>
> In other words, I want a formated output in two (or more)
> columns, each separated by a tabulation. I don't know if the
> number of items is odd or even. I can do it with a simple
> function but can I do it within a single format expression? I
> have read some doc about the ~[~] and ~{~} directives but, in
> despite of a lot of tentatives, I can't do anything.

newLISP

(set 'lst '("joe" "barney" "cathy" "kevin" "stephy" "thomas" "bob"))

(dolist (two (explode (append lst '("")) 2 true))
(println (format "%s\t%s" two)))

joe barney
cathy kevin
stephy thomas
bob

Subject	Author
Two at a time	B. Pym

BOFH excuse #398: Data for intranet got routed through the extranet and landed on the internet.

comp / comp.lang.lisp / Two at a time