From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Emanuel Berg Newsgroups: gmane.emacs.help Subject: cl-dolist, dolist, cl-return, Date: Wed, 08 Jul 2015 02:14:51 +0200 Message-ID: <87fv4za4jo.fsf@nl106-137-147.student.uu.se> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: ger.gmane.org 1436314619 5001 80.91.229.3 (8 Jul 2015 00:16:59 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Wed, 8 Jul 2015 00:16:59 +0000 (UTC) To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Wed Jul 08 02:16:46 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 1ZCd2a-0004yS-TZ for geh-help-gnu-emacs@m.gmane.org; Wed, 08 Jul 2015 02:16:45 +0200 Original-Received: from localhost ([::1]:60854 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZCd2a-0006SI-48 for geh-help-gnu-emacs@m.gmane.org; Tue, 07 Jul 2015 20:16:44 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:58499) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZCd2O-0006SD-Ri for help-gnu-emacs@gnu.org; Tue, 07 Jul 2015 20:16:33 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ZCd2L-0000eS-U7 for help-gnu-emacs@gnu.org; Tue, 07 Jul 2015 20:16:32 -0400 Original-Received: from plane.gmane.org ([80.91.229.3]:33528) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZCd2L-0000eE-Mr for help-gnu-emacs@gnu.org; Tue, 07 Jul 2015 20:16:29 -0400 Original-Received: from list by plane.gmane.org with local (Exim 4.69) (envelope-from ) id 1ZCd2D-0004oD-Sc for help-gnu-emacs@gnu.org; Wed, 08 Jul 2015 02:16:21 +0200 Original-Received: from nl106-137-246.student.uu.se ([130.243.137.246]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Wed, 08 Jul 2015 02:16:21 +0200 Original-Received: from embe8573 by nl106-137-246.student.uu.se with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Wed, 08 Jul 2015 02:16:21 +0200 X-Injected-Via-Gmane: http://gmane.org/ Mail-Followup-To: help-gnu-emacs@gnu.org Original-Lines: 44 Original-X-Complaints-To: usenet@ger.gmane.org X-Gmane-NNTP-Posting-Host: nl106-137-246.student.uu.se Mail-Copies-To: never User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.4 (gnu/linux) Cancel-Lock: sha1:NTMOra2QoaMfie/DJ1ukEh2WhaI= X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 80.91.229.3 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:105508 Archived-At: I just wrote the below code. `cl-return' works for `cl-dolist', but not for `dolist' because it hasn't an "implicit nil block ... established around the loop". And there is no `return'! I think this "cl-" stuff is confusing. Anyone cares to explain? By the way, I know there are one zillion loops in Lisp. What is the conventional way to 1. iterate a list 2. until some condition is met for some element 3. then break, to speak in C ? And: With [cl-]dolist, if the list is an expression and not an atom, does that get evaluated once, or does it happen every iteration like, say, a string length test would, again in C? Also: why isn't there a "neq"? Keep it up! ;; whole file: http://user.it.uu.se/~embe8573/conf/emacs-init/erc-my.el (defun neq (a b) (not (eq a b) )) (defun erc-kill-buffer-stay () "Close the current ERC buffer (e.g., to leave a channel) but stay in ERC if possible." (interactive) (cl-dolist (b (erc-buffer-list)) (when (neq (current-buffer) b) (erc-cmd-LEAVE "") (switch-to-buffer b) (cl-return) ))) -- underground experts united http://user.it.uu.se/~embe8573