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From: rm@fabula.de
Cc: "Guile \(Devel\)" <guile-devel@gnu.org>
Subject: Re: make an element last element of a list
Date: Tue, 21 Oct 2003 17:50:09 +0200	[thread overview]
Message-ID: <20031021155009.GC18423@www> (raw)
In-Reply-To: <1066748921.28107.220.camel@MARZULLO-MIS>

On Tue, Oct 21, 2003 at 05:08:42PM +0200, Laurent Marzullo wrote:
> Hello all,
> 
> I've got a scheme list 
> 
> SCM	scm_game_list;
> 
> and I want to add, with C API, an elements at the end of
> the list.

If you want to destrutively modify your list you can do the
following:
 
 (define my-lst (list 1 2 3 4))
 (define new-last (list 5))
 (set-cdr! (last my-lst) new-last)

using the c functions 
 

 SCM new_last =  scm_cons( new_elem , SCM_EOL );

 scm_set_cdr_x ( scm_last_pair (my_lst),  new_last );

HTH Ralf Mattes


> Is there any function to do this or must I go throw the entire
> list and adding a new scm_cons( new_elem , SCM_EOL ) at the end ?
> 
> Thanks
> -- 
> Laurent Marzullo <marzullo@la-defense.oilfield.slb.com>
> 
> 
> 
> _______________________________________________
> Guile-devel mailing list
> Guile-devel@gnu.org
> http://mail.gnu.org/mailman/listinfo/guile-devel


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  parent reply	other threads:[~2003-10-21 15:50 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 [this message]
2003-10-22 10:22   ` tomas
2003-10-22 10:40     ` rm

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