From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Paul Eggert Newsgroups: gmane.emacs.devel Subject: Re: Predicate for true lists Date: Fri, 6 Jul 2018 10:20:29 -0700 Organization: UCLA Computer Science Department Message-ID: <52fedad5-2403-461b-9e4b-440f13086509@cs.ucla.edu> References: <87fu3vdjjk.fsf@tcd.ie> <87bmcqhhsf.fsf@tcd.ie> <87in6xgtpb.fsf@tcd.ie> <2af892df-26cb-60b2-4fd8-067fcb3d32e9@cs.ucla.edu> <87r2kh9uwx.fsf@tcd.ie> <515ce169-8e88-4075-8a92-e8c1a496fe7d@default> NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: quoted-printable X-Trace: blaine.gmane.org 1530897644 11096 195.159.176.226 (6 Jul 2018 17:20:44 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Fri, 6 Jul 2018 17:20:44 +0000 (UTC) User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.8.0 Cc: emacs-devel@gnu.org To: Drew Adams , "Basil L. Contovounesios" Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Fri Jul 06 19:20:40 2018 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1fbUPK-0002bX-BZ for ged-emacs-devel@m.gmane.org; Fri, 06 Jul 2018 19:20:34 +0200 Original-Received: from localhost ([::1]:59034 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fbURM-0006Il-Th for ged-emacs-devel@m.gmane.org; Fri, 06 Jul 2018 13:22:43 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:52141) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fbUPP-0005bc-Lx for emacs-devel@gnu.org; Fri, 06 Jul 2018 13:20:40 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fbUPJ-0004Mm-MB for emacs-devel@gnu.org; Fri, 06 Jul 2018 13:20:39 -0400 Original-Received: from zimbra.cs.ucla.edu ([131.179.128.68]:58942) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1fbUPJ-0004Ji-8r for emacs-devel@gnu.org; Fri, 06 Jul 2018 13:20:33 -0400 Original-Received: from localhost (localhost [127.0.0.1]) by zimbra.cs.ucla.edu (Postfix) with ESMTP id 682521610F1; Fri, 6 Jul 2018 10:20:31 -0700 (PDT) Original-Received: from zimbra.cs.ucla.edu ([127.0.0.1]) by localhost (zimbra.cs.ucla.edu [127.0.0.1]) (amavisd-new, port 10032) with ESMTP id 7yC_a0R9gTQF; Fri, 6 Jul 2018 10:20:30 -0700 (PDT) Original-Received: from localhost (localhost [127.0.0.1]) by zimbra.cs.ucla.edu (Postfix) with ESMTP id A4CC3161105; Fri, 6 Jul 2018 10:20:30 -0700 (PDT) X-Virus-Scanned: amavisd-new at zimbra.cs.ucla.edu Original-Received: from zimbra.cs.ucla.edu ([127.0.0.1]) by localhost (zimbra.cs.ucla.edu [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id bzx6gwFH1wUe; Fri, 6 Jul 2018 10:20:30 -0700 (PDT) Original-Received: from [192.168.1.9] (unknown [47.154.30.119]) by zimbra.cs.ucla.edu (Postfix) with ESMTPSA id 43E691610F1; Fri, 6 Jul 2018 10:20:30 -0700 (PDT) Openpgp: preference=signencrypt Autocrypt: addr=eggert@cs.ucla.edu; prefer-encrypt=mutual; keydata= xsFNBEyAcmQBEADAAyH2xoTu7ppG5D3a8FMZEon74dCvc4+q1XA2J2tBy2pwaTqfhpxxdGA9 Jj50UJ3PD4bSUEgN8tLZ0san47l5XTAFLi2456ciSl5m8sKaHlGdt9XmAAtmXqeZVIYX/UFS 96fDzf4xhEmm/y7LbYEPQdUdxu47xA5KhTYp5bltF3WYDz1Ygd7gx07Auwp7iw7eNvnoDTAl KAl8KYDZzbDNCQGEbpY3efZIvPdeI+FWQN4W+kghy+P6au6PrIIhYraeua7XDdb2LS1en3Ss mE3QjqfRqI/A2ue8JMwsvXe/WK38Ezs6x74iTaqI3AFH6ilAhDqpMnd/msSESNFt76DiO1ZK QMr9amVPknjfPmJISqdhgB1DlEdw34sROf6V8mZw0xfqT6PKE46LcFefzs0kbg4GORf8vjG2 Sf1tk5eU8MBiyN/bZ03bKNjNYMpODDQQwuP84kYLkX2wBxxMAhBxwbDVZudzxDZJ1C2VXujC OJVxq2kljBM9ETYuUGqd75AW2LXrLw6+MuIsHFAYAgRr7+KcwDgBAfwhPBYX34nSSiHlmLC+ KaHLeCLF5ZI2vKm3HEeCTtlOg7xZEONgwzL+fdKo+D6SoC8RRxJKs8a3sVfI4t6CnrQzvJbB n6gxdgCu5i29J1QCYrCYvql2UyFPAK+do99/1jOXT4m2836j1wARAQABzSBQYXVsIEVnZ2Vy dCA8ZWdnZXJ0QGNzLnVjbGEuZWR1PsLBfgQTAQIAKAUCTIByZAIbAwUJEswDAAYLCQgHAwIG FQgCCQoLBBYCAwECH In-Reply-To: <515ce169-8e88-4075-8a92-e8c1a496fe7d@default> Content-Language: en-US X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [fuzzy] X-Received-From: 131.179.128.68 X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.org gmane.emacs.devel:227010 Archived-At: Drew Adams wrote: > They both are rare, and there doesn't seem to be much > difference in their frequencies Just looking at n-grams is not sufficient. You need to look how the terms= are=20 actually used. I just now checked Google Books for books published in the 21st century.=20 Searching for "proper list" (with the quotes in the search) got a signifi= cant=20 number of relevant hits from Lispish books, with a smattering of Prolog. = There=20 were also quite a few irrelevant hits. Searching for "true list" (again, quoted) got zero relevant hits. The "tr= ue=20 list" hits from programming books were like this one, from page 94 of "Pr= actical=20 OCaml": # List.mem 50 example_list;; - : bool =3D true # List.mem 100 example_list;; - : bool =3D false That is, these hits did not represent usage "true list" to mean a=20 null-terminated list. From this survey, it appears that the unanimous preference in recent pub= lished=20 books is for "proper list" over "true list".