From: prj@po.cwru.edu (Paul Jarc)
Subject: Re: srfi-1 circular-list
Date: Fri, 19 Mar 2004 17:24:07 -0500 [thread overview]
Message-ID: <m3brms1nmq.fsf@multivac.cwru.edu> (raw)
In-Reply-To: <87fzc4h4hc.fsf@zip.com.au> (Kevin Ryde's message of "Sat, 20 Mar 2004 08:11:27 +1000")
Kevin Ryde <user42@zip.com.au> wrote:
> +(define (circular-list . lst)
> + (if (not (null? lst))
> + (set-cdr! (last-pair lst) lst))
> + lst)
Or, if we want to preserve the error when no elements are given:
(define (circular-list elt1 . rest)
(define lst (cons elt1 rest))
(set-cdr! (last-pair lst) lst)
lst)
paul
_______________________________________________
Guile-devel mailing list
Guile-devel@gnu.org
http://mail.gnu.org/mailman/listinfo/guile-devel
next prev parent reply other threads:[~2004-03-19 22:24 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-03-19 22:11 srfi-1 circular-list Kevin Ryde
2004-03-19 22:24 ` Paul Jarc [this message]
2004-03-19 22:32 ` Kevin Ryde
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
List information: https://www.gnu.org/software/guile/
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=m3brms1nmq.fsf@multivac.cwru.edu \
--to=prj@po.cwru.edu \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).