From: "Drew Adams" <drew.adams@oracle.com>
To: "'Allan Gottlieb'" <gottlieb@nyu.edu>, <help-gnu-emacs@gnu.org>
Subject: RE: Wanted: Adding list-elements into an existing list
Date: Thu, 16 Oct 2008 09:12:03 -0700 [thread overview]
Message-ID: <004601c92fa9$ed7ed2e0$c2b22382@us.oracle.com> (raw)
In-Reply-To: <yu9vdvsfrzu.fsf@nyu.edu>
> >> (append) does not modify its first argument which is what I want.
> >> I can solve it through (setq x (append x y))
> >
> > Depends what you want. You mentioned `add-to-list', which
> adds an element only
> > if it is not already there. Neither `append' nor `nconc'
> does that for combining
> > lists.
> >
> > Sounds more like you want something like set intersection:
> > see functions `intersection' or `nintersection' in library `cl-seq.el'.
>
> Sounds more like set union to me.
Oooooops! (another espresso, please)
Yes - `union' or `nunion'.
next prev parent reply other threads:[~2008-10-16 16:12 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-10-16 13:13 Wanted: Adding list-elements into an existing list Nordlöw
2008-10-16 13:16 ` Joost Diepenmaat
2008-10-16 13:36 ` Nordlöw
2008-10-16 15:43 ` Drew Adams
2008-10-16 16:02 ` Allan Gottlieb
2008-10-16 16:12 ` Drew Adams [this message]
2008-10-17 0:28 ` Barry Margolin
2008-10-16 22:32 ` Pascal J. Bourguignon
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