From: rm@fabula.de
Cc: guile-devel@gnu.org
Subject: Re: make an element last element of a list
Date: Wed, 22 Oct 2003 12:40:31 +0200 [thread overview]
Message-ID: <20031022104031.GA22986@www> (raw)
In-Reply-To: <20031022102254.GA23380@www>
> > (define my-lst (list 1 2 3 4))
> > (define new-last (list 5))
> > (set-cdr! (last my-lst) new-last)
^^^^
Sorry, typo, should be (last-pair ....)
RalfD
> ...but you don't want to do this if the lists grow too large.
> Keeping track of the last cons cell resp. maintaining a
> reversed list (and reversing it once at the end, if ever
> necessary) as another poster suggested is more efficient.
> For short lists the solution is short and sweet, though.
>
> Don't hesitate to ask if you need examples.
>
> Cheers
> -- tomas
>
>
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> Guile-devel mailing list
> Guile-devel@gnu.org
> http://mail.gnu.org/mailman/listinfo/guile-devel
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prev parent reply other threads:[~2003-10-22 10:40 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-10-21 15:08 make an element last element of a list Laurent Marzullo
2003-10-21 15:42 ` Stephen Compall
2003-10-21 15:50 ` rm
2003-10-22 10:22 ` tomas
2003-10-22 10:40 ` rm [this message]
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