From: tomas@tuxteam.de
To: help-gnu-emacs@gnu.org
Subject: Re: Replace element in list
Date: Mon, 2 Sep 2019 12:46:35 +0200 [thread overview]
Message-ID: <20190902104635.GE1466@tuxteam.de> (raw)
In-Reply-To: <20190902104107.GD1466@tuxteam.de>
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On Mon, Sep 02, 2019 at 12:41:08PM +0200, tomas@tuxteam.de wrote:
> On Mon, Sep 02, 2019 at 12:37:23PM +0200, tomas@tuxteam.de wrote:
> > On Mon, Sep 02, 2019 at 11:44:10AM +0200, Andreas Röhler wrote:
> > > Hi,
> > >
> > > is there a recommended way to replace element x at index i of
> > > somelist y by newelement?
> >
> > Like this?
> >
> > scheme@(guile-user)> (define lst (list-copy '(fire water air earth)))
> > scheme@(guile-user)> (list-set! lst 2 'mud)
> > $3 = mud
> > scheme@(guile-user)> lst
> > $4 = (fire water mud earth)
>
> Oops, sorry. Wrong language, wrong mailing list. Embarrasing.
In Emacs Lisp you could try:
(setcar (nthcdr 3 foo) 'mud)
...but remember, you are leaving the functional sector ;-)
Cheers
-- t
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next prev parent reply other threads:[~2019-09-02 10:46 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-02 9:44 Replace element in list Andreas Röhler
2019-09-02 10:37 ` tomas
2019-09-02 10:41 ` tomas
2019-09-02 10:46 ` tomas [this message]
2019-09-02 11:03 ` Michael Heerdegen
2019-09-02 11:05 ` tomas
2019-09-02 13:38 ` Andreas Röhler
2019-09-02 13:29 ` Stefan Monnier
2019-09-02 13:43 ` tomas
2019-09-02 14:00 ` Andreas Röhler
2019-09-02 14:57 ` Stefan Monnier
2019-09-02 20:29 ` Andreas Röhler
2019-09-02 21:32 ` Stefan Monnier
2019-09-03 5:37 ` Andreas Röhler
-- strict thread matches above, loose matches on Subject: below --
2018-11-22 4:42 replace " edgar
2018-11-22 5:18 ` Eric Abrahamsen
2018-11-22 5:39 ` Drew Adams
2018-11-22 6:04 ` Eric Abrahamsen
2018-11-22 13:19 ` Stefan Monnier
[not found] ` <mailman.4442.1542892802.1284.help-gnu-emacs@gnu.org>
2018-11-23 12:05 ` Robert Munyer
2018-11-24 3:01 ` edgar
2018-11-24 5:27 ` Drew Adams
2018-11-24 7:22 ` edgar
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