From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Heime Newsgroups: gmane.emacs.help Subject: Re: Too many permutations computed Date: Fri, 04 Aug 2023 18:44:49 +0000 Message-ID: <29_RCsXxqgvFMr0fCC8_S37RlUHg1FC4k9YCKpfSQQaAIkYV6k6k4MNrKiwAYYS-dX3wEqJPszTWohnhFU8uJxWMgHCB6xeClsDBHEeD-o8=@protonmail.com> References: <87sf91eopn.fsf@dataswamp.org> <87wmybkc4m.fsf@dataswamp.org> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="38174"; mail-complaints-to="usenet@ciao.gmane.io" Cc: help-gnu-emacs@gnu.org To: Emanuel Berg Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Fri Aug 04 20:45:31 2023 Return-path: Envelope-to: geh-help-gnu-emacs@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1qRznm-0009ir-S1 for geh-help-gnu-emacs@m.gmane-mx.org; Fri, 04 Aug 2023 20:45:30 +0200 Original-Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qRznR-0003og-AH; Fri, 04 Aug 2023 14:45:09 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qRznM-0003mY-8V for help-gnu-emacs@gnu.org; Fri, 04 Aug 2023 14:45:05 -0400 Original-Received: from mail-40141.protonmail.ch ([185.70.40.141]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qRznI-0003o7-IV for help-gnu-emacs@gnu.org; Fri, 04 Aug 2023 14:45:02 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=protonmail.com; s=protonmail3; t=1691174697; x=1691433897; bh=8sQj4VeL423TrkV/yO9OhfaDLDbWKajiPgifS9gTJ9w=; h=Date:To:From:Cc:Subject:Message-ID:In-Reply-To:References: Feedback-ID:From:To:Cc:Date:Subject:Reply-To:Feedback-ID: Message-ID:BIMI-Selector; b=JdF4lHgHSjb4xO4TdIOT7GpjDWKQ0e3X4NiTVwfHsnGdDO4H9Hb/FwgQbrHXA8Y1m 06TiAjCYaDvJzfsr5GWfdtlxwl6Hn1T1xVnJyiV+oy85PuMIVLrzQkg7SIvxk+mvBE 3Iv8xTTdPDlYCpA37jlqTS61t2x15NiBR7sKF1uPYzAfJWASmeeFarPspbmTX5rls5 VLxoA4DpniUZaQHyYy/FBSNl0QSnWwxVHnE5iCuFRRInLpJehcwub/Whvp4nHW5aFl 65taqjMSR61crvPk1bY5UupGfUaeGCd3MEgJVNK63RRCp32cWF9NXqU58j/3Hrcbbl yySVYDBpCJt5w== In-Reply-To: <87wmybkc4m.fsf@dataswamp.org> Feedback-ID: 57735886:user:proton Received-SPF: pass client-ip=185.70.40.141; envelope-from=heimeborgia@protonmail.com; helo=mail-40141.protonmail.ch X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_MSPIKE_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.29 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-mx.org@gnu.org Original-Sender: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Xref: news.gmane.io gmane.emacs.help:144599 Archived-At: ------- Original Message ------- On Friday, August 4th, 2023 at 10:13 AM, Emanuel Berg = wrote: > uzibalqa wrote: >=20 > > > Again you can check out these two > > >=20 > > > https://dataswamp.org/~incal/emacs-init/perm.el > > > https://www.emacswiki.org/emacs/StringPermutations > > >=20 > > > but after spending so much time on your own solution I get it > > > you want to complete it ... > >=20 > > There are many algorithms out there. You should mention the > > kind of algorithm you are implementing. >=20 >=20 > Not sure it has one? But it is for permutation of list > elements in general, the rest is just using it for the string > use case.=20 It does use a published technique, but did not take time to determine=20 which one is it. If I can space some time, I can check things out.=20 > Maybe Emacs should have a built-in permutation > function BTW, and a ditto library with helpers, e.g. > for strings ... That would make sense because permutations is quite a standard thing today with a number of algorithms. The implementation to use depends on how much complication you are willing to accept programatically. The more complicated, the more benefits you get. =20 > > I am using the original algorithm bf Robert Heap (1964). > > It is not the common implementation you see because what > > I have seen is the implementation of a simpler algorithm > > (programatically), but which is not optimal in the way > > Robert constructed it. >=20 >=20 > Okay, well, see if you can get it to work then ... >=20 > -- > underground experts united > https://dataswamp.org/~incal