From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Jean Louis Newsgroups: gmane.emacs.help Subject: Re: [External] : Re: Any faster way to find frequency of words? Date: Mon, 10 May 2021 19:26:18 +0300 Message-ID: References: <87h7jcq7li.fsf@ericabrahamsen.net> <87cztzqmxl.fsf@ericabrahamsen.net> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="7753"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Mutt/2.0.6 (2021-03-06) Cc: Eric Abrahamsen , Help GNU Emacs To: Drew Adams Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Mon May 10 18:27:56 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 1lg8l9-0001rz-C4 for geh-help-gnu-emacs@m.gmane-mx.org; Mon, 10 May 2021 18:27:55 +0200 Original-Received: from localhost ([::1]:56856 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lg8l8-0008PG-Ep for geh-help-gnu-emacs@m.gmane-mx.org; Mon, 10 May 2021 12:27:54 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:34556) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lg8k2-0008Oz-Rw for help-gnu-emacs@gnu.org; Mon, 10 May 2021 12:26:48 -0400 Original-Received: from stw1.rcdrun.com ([217.170.207.13]:46489) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lg8jz-0006Cf-TU for help-gnu-emacs@gnu.org; Mon, 10 May 2021 12:26:46 -0400 Original-Received: from localhost ([::ffff:154.228.89.241]) (AUTH: PLAIN securesender, TLS: TLS1.3,256bits,ECDHE_RSA_AES_256_GCM_SHA384) by stw1.rcdrun.com with ESMTPSA id 00000000000ABF26.0000000060995EC1.00005B19; Mon, 10 May 2021 09:26:40 -0700 Mail-Followup-To: Drew Adams , Eric Abrahamsen , Help GNU Emacs Content-Disposition: inline In-Reply-To: Received-SPF: pass client-ip=217.170.207.13; envelope-from=bugs@gnu.support; helo=stw1.rcdrun.com X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, 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: 2.1.23 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:129668 Archived-At: * Drew Adams [2021-05-10 17:03]: > I use this, FWIW: > > (defun hash-table-to-alist (hash-table) > "Create and return an alist created from HASH-TABLE. > The order of alist entries is undefined, but it seems to be the same > as the order of hash-table entries (which seems to be the order in > which the entries were added to the table)." > (let ((al ())) > (maphash (lambda (key val) (push (cons key val) al)) > hash-table) > (nreverse al))) That may be better, nicer. I wonder if nreverse is really needed as function just returns some data, is that data anyway destroyed thereafter? Then I was also using reverse, I will take it out, as I don't think there is any order in the hash, if I reverse it or not, it does not matter. (setq hash (make-hash-table)) (puthash 'Name "Jimmy" hash) (puthash "City" "New York" hash) (puthash "Brigade" "II" hash) hash ⇒ #s(hash-table size 65 test eql rehash-size 1.5 rehash-threshold 0.8125 data (Name "Jimmy" "City" "New York" "Brigade" "II")) (puthash 'Name "Jimmy2" hash) hash ⇒ #s(hash-table size 65 test eql rehash-size 1.5 rehash-threshold 0.8125 data (Name "Jimmy2" "City" "New York" "Brigade" "II")) I can see that hash keeps order of entries, but I don't believe that is guaranteed. Visually it gives us the same order: (hash-table-to-alist hash) ⇒ ((Name . "Jimmy2") ("City" . "New York") ("Brigade" . "II")) (setq alist (hash-table-to-alist hash)) ⇒ ((Name . "Jimmy2") ("City" . "New York") ("Brigade" . "II")) (assoc 'Name alist) ⇒ (Name . "Jimmy2") I just wonder if the order matters. It should not matter in hash, alist, plist I guess. -- Jean Take action in Free Software Foundation campaigns: https://www.fsf.org/campaigns Sign an open letter in support of Richard M. Stallman https://stallmansupport.org/ https://rms-support-letter.github.io/