From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Marcin Borkowski Newsgroups: gmane.emacs.help Subject: Re: How to flatten a one-level-deep list? Date: Wed, 18 May 2016 11:37:21 +0200 Message-ID: <87lh37vh9q.fsf@mbork.pl> References: <877fes54pz.fsf@mbork.pl> <20160518082123.GB4640@tuxteam.de> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: ger.gmane.org 1463564289 3953 80.91.229.3 (18 May 2016 09:38:09 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Wed, 18 May 2016 09:38:09 +0000 (UTC) Cc: help-gnu-emacs@gnu.org To: tomas@tuxteam.de Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Wed May 18 11:37:57 2016 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 1b2xvQ-0000TP-Ti for geh-help-gnu-emacs@m.gmane.org; Wed, 18 May 2016 11:37:57 +0200 Original-Received: from localhost ([::1]:43878 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1b2xvQ-0001Pe-1n for geh-help-gnu-emacs@m.gmane.org; Wed, 18 May 2016 05:37:56 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:55891) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1b2xv2-0001PK-NP for help-gnu-emacs@gnu.org; Wed, 18 May 2016 05:37:33 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1b2xuy-0000xL-5R for help-gnu-emacs@gnu.org; Wed, 18 May 2016 05:37:31 -0400 Original-Received: from mail.mojserwer.eu ([2a01:5e00:2:52::8]:34828) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1b2xux-0000wQ-Q1 for help-gnu-emacs@gnu.org; Wed, 18 May 2016 05:37:28 -0400 Original-Received: from localhost (localhost [127.0.0.1]) by mail.mojserwer.eu (Postfix) with ESMTP id 53E5AB85285; Wed, 18 May 2016 11:37:25 +0200 (CEST) X-Virus-Scanned: Debian amavisd-new at mail.mojserwer.eu Original-Received: from mail.mojserwer.eu ([127.0.0.1]) by localhost (mail.mojserwer.eu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id AJ+AnklVt9p7; Wed, 18 May 2016 11:37:22 +0200 (CEST) Original-Received: from localhost (efj237.neoplus.adsl.tpnet.pl [83.21.47.237]) by mail.mojserwer.eu (Postfix) with ESMTPSA id 4BC53B85284; Wed, 18 May 2016 11:37:22 +0200 (CEST) User-agent: mu4e 0.9.16; emacs 25.1.50.1 In-reply-to: <20160518082123.GB4640@tuxteam.de> X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6.x X-Received-From: 2a01:5e00:2:52::8 X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.21 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" Xref: news.gmane.org gmane.emacs.help:110044 Archived-At: On 2016-05-18, at 10:21, tomas@tuxteam.de wrote: > (setq l '((a b c) (d e f) (g h i))) > (apply 'append l) > => (a b c d e f g h i) > > No idea whether performance or edge cases match your requirements, > though :) Thanks, that looks fine. Meanwhile, I went with a mapconcat nested within a mapconcat (the atoms I have are strings, and what I really need is concatenation of all of them). > regards > - -- t Best, -- Marcin Borkowski http://octd.wmi.amu.edu.pl/en/Marcin_Borkowski Faculty of Mathematics and Computer Science Adam Mickiewicz University