From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Emanuel Berg via Users list for the GNU Emacs text editor Newsgroups: gmane.emacs.help Subject: same sound random sort everywhere (was: Re: avoid narrow-to-region (was: Re: replace-regexp)) Date: Fri, 21 May 2021 19:35:55 +0200 Message-ID: <87v97cdm6c.fsf_-_@zoho.eu> References: <87tunf1mz5.fsf@zoho.eu> <87v97v6mxg.fsf@gnu.org> <87wnsaz9df.fsf@zoho.eu> <877dkaytwu.fsf@zoho.eu> <87eeegx25w.fsf_-_@zoho.eu> <87fsywtp3f.fsf@zoho.eu> <87bl9ktms2.fsf@zoho.eu> <875yzsrxd9.fsf@zoho.eu> <878s4o2gnu.fsf@zoho.eu> <87zgx40zqx.fsf@zoho.eu> <87eeeg0wkn.fsf@zoho.eu> Reply-To: Emanuel Berg Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="37824"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) To: help-gnu-emacs@gnu.org Cancel-Lock: sha1:+mT/4vQtoyomk2aPKT82PukV+gU= Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Fri May 21 19:36:43 2021 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 1lk94k-0009cs-Du for geh-help-gnu-emacs@m.gmane-mx.org; Fri, 21 May 2021 19:36:42 +0200 Original-Received: from localhost ([::1]:56718 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lk94j-000735-G3 for geh-help-gnu-emacs@m.gmane-mx.org; Fri, 21 May 2021 13:36:41 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:44610) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lk94K-00072i-3T for help-gnu-emacs@gnu.org; Fri, 21 May 2021 13:36:16 -0400 Original-Received: from ciao.gmane.io ([116.202.254.214]:44266) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lk94E-0004J9-As for help-gnu-emacs@gnu.org; Fri, 21 May 2021 13:36:15 -0400 Original-Received: from list by ciao.gmane.io with local (Exim 4.92) (envelope-from ) id 1lk94C-0008mY-4a for help-gnu-emacs@gnu.org; Fri, 21 May 2021 19:36:08 +0200 X-Injected-Via-Gmane: http://gmane.org/ Mail-Followup-To: help-gnu-emacs@gnu.org Mail-Copies-To: never Received-SPF: pass client-ip=116.202.254.214; envelope-from=geh-help-gnu-emacs@m.gmane-mx.org; helo=ciao.gmane.io X-Spam_score_int: -15 X-Spam_score: -1.6 X-Spam_bar: - X-Spam_report: (-1.6 / 5.0 requ) BAYES_00=-1.9, HEADER_FROM_DIFFERENT_DOMAINS=0.25, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.23 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" Xref: news.gmane.io gmane.emacs.help:130001 Archived-At: Here we see it implemented for strings. If the nshuff algorithm is sound data type should - you guessed it - not influence anything in either way to make it more or less sound. See comments. ;;; -*- lexical-binding: t -*- ;;; ;;; this file: ;;; http://user.it.uu.se/~embe8573/emacs-init/random-generic.el ;;; https://dataswamp.org/~incal/emacs-init/random-generic.el (require 'cl-lib) ;; add more datatypes here... (for each type, one disassembler, ;; one call to nshuff, and one assembler is needed) (defun string-random (s) (let*((str-lst (string-to-list s)) (lst (nshuff str-lst)) (str-shuff (mapconcat (lambda (c) (char-to-string c)) lst "")) ) str-shuff) ) ;; (string-random "Elisp is my favorite E") ;; ... all use the same random-sort algorithm (defun nshuff (sq) (cl-loop for i from (length sq) downto 2 do (cl-rotatef (elt sq (cl-random i)) (elt sq (1- i)) )) sq) ;; (nshuff '(a b c)) ; (b c a) (a b c) (b c a) ... -- underground experts united https://dataswamp.org/~incal