From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: "Pascal J. Bourguignon" Newsgroups: gmane.emacs.help Subject: Re: plists, alists, and hashtables Date: Fri, 07 Aug 2015 09:34:04 +0200 Organization: Informatimago Message-ID: <874mkbmu1f.fsf@kuiper.lan.informatimago.com> References: <876150vwaa.fsf@mbork.pl> <873803x5q4.fsf@kuiper.lan.informatimago.com> <87a8u7we9s.fsf_-_@lifelogs.com> <877fp8t9ru.fsf@lifelogs.com> <87lhdnsw2n.fsf@lifelogs.com> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Trace: ger.gmane.org 1438932929 19980 80.91.229.3 (7 Aug 2015 07:35:29 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Fri, 7 Aug 2015 07:35:29 +0000 (UTC) To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Fri Aug 07 09:35:24 2015 Return-path: Envelope-to: geh-help-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1ZNcBY-0000mN-2t for geh-help-gnu-emacs@m.gmane.org; Fri, 07 Aug 2015 09:35:24 +0200 Original-Received: from localhost ([::1]:48258 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZNcBX-00068H-6t for geh-help-gnu-emacs@m.gmane.org; Fri, 07 Aug 2015 03:35:23 -0400 Original-Path: usenet.stanford.edu!fu-berlin.de!uni-berlin.de!individual.net!not-for-mail Original-Newsgroups: gnu.emacs.help Original-Lines: 19 Original-X-Trace: individual.net /oooJ//GxLK3vnKA9/K8FAlfni/+huTjcvVYiY4ziJamruqlMf Cancel-Lock: sha1:Nzg5ZjVmOWI2NDdmYmM4ZTcxZTI3NTBkNmNjOTliYmJjNDRmNTJhNw== sha1:H+i4EE8qLwvJsAajXOXifxKhk/Q= Face: iVBORw0KGgoAAAANSUhEUgAAADAAAAAwAQMAAABtzGvEAAAABlBMVEUAAAD///+l2Z/dAAAA oElEQVR4nK3OsRHCMAwF0O8YQufUNIQRGIAja9CxSA55AxZgFO4coMgYrEDDQZWPIlNAjwq9 033pbOBPtbXuB6PKNBn5gZkhGa86Z4x2wE67O+06WxGD/HCOGR0deY3f9Ijwwt7rNGNf6Oac l/GuZTF1wFGKiYYHKSFAkjIo1b6sCYS1sVmFhhhahKQssRjRT90ITWUk6vvK3RsPGs+M1RuR mV+hO/VvFAAAAABJRU5ErkJggg== X-Accept-Language: fr, es, en User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.3 (gnu/linux) Original-Xref: usenet.stanford.edu gnu.emacs.help:214027 X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Users list for the GNU Emacs text editor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Original-Sender: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.help:106312 Archived-At: Ted Zlatanov writes: > Right. I agree. My point was different: there is no "keys" function for > alists and plists. Keys in those two formats are a convention. Also, there's rassoc! (let ((alist '((:one . 1) (:two . 2) (:three . 3)))) (list (cdr (assoc :two alist)) (car (rassoc 1 alist)))) --> (2 :one) Do that with a hash-table!!! -- __Pascal Bourguignon__ http://www.informatimago.com/ “The factory of the future will have only two employees, a man and a dog. The man will be there to feed the dog. The dog will be there to keep the man from touching the equipment.” -- Carl Bass CEO Autodesk