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: How to iterate over properties in a plist? Date: Sat, 01 Aug 2015 01:34:55 +0200 Organization: Informatimago Message-ID: <87y4hvvr34.fsf@kuiper.lan.informatimago.com> References: 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 1438385749 13085 80.91.229.3 (31 Jul 2015 23:35:49 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Fri, 31 Jul 2015 23:35:49 +0000 (UTC) To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Sat Aug 01 01:35:49 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 1ZLJq8-0006ln-8C for geh-help-gnu-emacs@m.gmane.org; Sat, 01 Aug 2015 01:35:48 +0200 Original-Received: from localhost ([::1]:46315 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZLJq7-0004vH-Cr for geh-help-gnu-emacs@m.gmane.org; Fri, 31 Jul 2015 19:35:47 -0400 Original-Path: usenet.stanford.edu!fu-berlin.de!uni-berlin.de!individual.net!not-for-mail Original-Newsgroups: gnu.emacs.help Original-Lines: 29 Original-X-Trace: individual.net PCMAvzyYIg7IpC6aVKL83wxoSwiICJQzEUXjN8CLhn442J1/0y Cancel-Lock: sha1:NDAyZjVmOWVmMDgyYjAyYjIzMjU5NWUxMzdiYzc0NzkyOTk0MmZjMg== sha1:JPYge3mCcRG7p1mGTv1aKvzj9ck= 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:213891 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:106176 Archived-At: Marcin Borkowski writes: > Hi all, > > I need to iterate over all properties in a plist. Obviously, mapcar (or > mapc, since I need side effects only) is of no use for me. I can easily > write a plist-mapc function: > > (defun plist-mapc (function plist) > "Iterate FUNCTION (a two-argument function) over PLIST. Error > checking is for weenies." > (when plist > (funcall function (car plist) (cadr plist)) > (plist-mapc function (cddr plist)))) > > but maybe it's there already? There's: (loop for (k v) on p-list by (function cddr) do (something-with :key k :value v)) But you might still want to abstrat it away in a map-plist function. -- __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