From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Kevin Rodgers Newsgroups: gmane.emacs.help Subject: Re: best way to get the list of unique keys from 2 alists Date: Mon, 19 Dec 2005 11:50:18 -0700 Message-ID: References: <87vexmo2kf.fsf-monnier+gnu.emacs.help@gnu.org> NNTP-Posting-Host: main.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Trace: sea.gmane.org 1135018821 30577 80.91.229.2 (19 Dec 2005 19:00:21 GMT) X-Complaints-To: usenet@sea.gmane.org NNTP-Posting-Date: Mon, 19 Dec 2005 19:00:21 +0000 (UTC) Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Mon Dec 19 20:00:19 2005 Return-path: Original-Received: from lists.gnu.org ([199.232.76.165]) by ciao.gmane.org with esmtp (Exim 4.43) id 1EoQEq-0004G7-Rz for geh-help-gnu-emacs@m.gmane.org; Mon, 19 Dec 2005 20:00:01 +0100 Original-Received: from localhost ([127.0.0.1] helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1EoQFh-0007wO-KD for geh-help-gnu-emacs@m.gmane.org; Mon, 19 Dec 2005 14:00:53 -0500 Original-Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1EoQDT-0007Re-V4 for help-gnu-emacs@gnu.org; Mon, 19 Dec 2005 13:58:36 -0500 Original-Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1EoQDS-0007Qo-47 for help-gnu-emacs@gnu.org; Mon, 19 Dec 2005 13:58:34 -0500 Original-Received: from [199.232.76.173] (helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1EoQDR-0007Qh-3b for help-gnu-emacs@gnu.org; Mon, 19 Dec 2005 13:58:33 -0500 Original-Received: from [80.91.229.2] (helo=ciao.gmane.org) by monty-python.gnu.org with esmtp (TLS-1.0:RSA_AES_128_CBC_SHA:16) (Exim 4.34) id 1EoQGQ-0002b4-H0 for help-gnu-emacs@gnu.org; Mon, 19 Dec 2005 14:01:38 -0500 Original-Received: from list by ciao.gmane.org with local (Exim 4.43) id 1EoQ8N-0001XU-0r for help-gnu-emacs@gnu.org; Mon, 19 Dec 2005 19:53:19 +0100 Original-Received: from 207.167.42.60 ([207.167.42.60]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Mon, 19 Dec 2005 19:53:19 +0100 Original-Received: from ihs_4664 by 207.167.42.60 with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Mon, 19 Dec 2005 19:53:19 +0100 X-Injected-Via-Gmane: http://gmane.org/ Original-To: help-gnu-emacs@gnu.org Original-Lines: 18 Original-X-Complaints-To: usenet@sea.gmane.org X-Gmane-NNTP-Posting-Host: 207.167.42.60 User-Agent: Mozilla Thunderbird 0.9 (X11/20041105) X-Accept-Language: en-us, en In-Reply-To: <87vexmo2kf.fsf-monnier+gnu.emacs.help@gnu.org> X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Users list for the GNU Emacs text editor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Original-Sender: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Errors-To: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.help:32070 Archived-At: Stefan Monnier wrote: >>I've got 2 alists of (SYMBOL . "STRING") pairs, and I need to get the >>list of unique symbol names to pass to completing-read as its TABLE >>argument: (("SYMBOL-NAME") ...) > > > I'd just do: > > (completing-read "foo" (mapcar (lambda (x) (symbol-name (car x))) > (append list1 list2))) > > You don't need to remove duplicates. In 21.4 the TABLE elements must be lists, and duplicates are displayed in the *Completions* buffer. -- Kevin Rodgers