From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Yuri Khan Newsgroups: gmane.emacs.help Subject: Re: Appending lists Date: Wed, 16 Jun 2021 18:16:47 +0700 Message-ID: References: <4tl1yvylvg1fxx5eefjs9mnk.1623688568572@email.android.com> <87o8c8l32h.fsf@posteo.net> <87zgvs2bup.fsf@zoho.eu> <87y2bby1kr.fsf@zoho.eu> <20210615091834.GB24886@tuxteam.de> <87im2ewr3k.fsf@zoho.eu> <20210616072819.GB17919@tuxteam.de> 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="29091"; mail-complaints-to="usenet@ciao.gmane.io" To: tomas@tuxteam.de, help-gnu-emacs Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane-mx.org@gnu.org Wed Jun 16 13:18:10 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 1ltTYf-0007Qe-LG for geh-help-gnu-emacs@m.gmane-mx.org; Wed, 16 Jun 2021 13:18:09 +0200 Original-Received: from localhost ([::1]:46396 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1ltTYe-0007HD-CV for geh-help-gnu-emacs@m.gmane-mx.org; Wed, 16 Jun 2021 07:18:08 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:41986) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1ltTXZ-0007H0-Ob for help-gnu-emacs@gnu.org; Wed, 16 Jun 2021 07:17:01 -0400 Original-Received: from mail-ua1-x929.google.com ([2607:f8b0:4864:20::929]:33324) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1ltTXX-0006mI-Tf for help-gnu-emacs@gnu.org; Wed, 16 Jun 2021 07:17:01 -0400 Original-Received: by mail-ua1-x929.google.com with SMTP id x22so649090uap.0 for ; Wed, 16 Jun 2021 04:16:58 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :content-transfer-encoding; bh=QJF5p+90wtCHxaY+QGGK7cpbt4Ji9nYIVoEnRY3g3W4=; b=U4sYbKu45OnzeYOfulHScoQsAPuabnBiea8i43S252OB+3+KWF+uAuZ2/sjQelWt4p cwN/nUT24awugqLvwVuy8Kp0CbkQhmKseX/yPMjB8q+O5V9v1fHpk1E2gYTIPWV/IUTS 3wh43k0hRFQ9nxJiArj9VlSgJs4HMuEwXLMHQDyt4+mCIQJtz9oUH4ohNVahEFi93xnq v27OMhxr1b/EwpuqCKyYgo+sVPA4BFT99rcPHgdvEfkoedB7RRHdzbqqmuxNrPCEj652 mOcOJX48akLZhkYPFsCbHBokmBT/Peqio+76iIXIGyhIOMtdrPTvIm9Vv/pGGZnfYyGB KmMA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:content-transfer-encoding; bh=QJF5p+90wtCHxaY+QGGK7cpbt4Ji9nYIVoEnRY3g3W4=; b=KB48FO9xUuERRpByQ5tOhwv0n+XP0nVvAxq89zRbMGIItEIe6Jc+28ujzqMj01JnI6 bTTfSq3e8PLeEzsLm4u19DqmqkCxXNTdXs7Z7i37P3nmyAWq/FRv9znvryt1zTEp7Naj x/IGxbvVGBhUTD3ddsMTOJJ8bgJxHr3NZjY9OsAtKUn40w7P87OQ3fh5S/sxasrlcJLj ZiH1TQU+PpTkhxLVXEjcyU7m2PljE/n1f9GoGnFnpPmQIt4+tn/ha3fm2B/413PWZb+W Xt5IlaKKtMquA2EZs/nAQvZ9xEubu85fFPHR8jBuLAnFvyUlTrBg1pk+BjnHpw3Q07l+ wTuQ== X-Gm-Message-State: AOAM532A+kvxAF99GnmeSIOOOvZO8zcew8c0i8BrHva5FJbOR/MoGbVs CoUBIax0nlPPvvoM0wi0ovyttnQMkvSVwvmpqo6ioIzq+K4= X-Google-Smtp-Source: ABdhPJw+pY5ufq7Td6/7Q5ETCLJ1iANpbEe2GFLwv2fBKOe0DAx83M3nngUfbN9rcHN55Gh6Oeut20c5CBvjL7EsvUA= X-Received: by 2002:ab0:211a:: with SMTP id d26mr4022051ual.41.1623842218222; Wed, 16 Jun 2021 04:16:58 -0700 (PDT) In-Reply-To: Received-SPF: pass client-ip=2607:f8b0:4864:20::929; envelope-from=yurivkhan@gmail.com; helo=mail-ua1-x929.google.com 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_DNSWL_NONE=-0.0001, SPF_HELO_NONE=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:130899 Archived-At: On Wed, 16 Jun 2021 at 16:35, Jean Louis wrote: > What is it doing in background, or underground, does not really matter > for user, what matters is that `x' in following example is changed: See, that=E2=80=99s your problem: You think there *is* an underground. Lisp starts with symbols and cons cells and that=E2=80=99s the ground level= . It then builds up from that to lists and trees and associative lists. And when you have an associative list binding a symbol to a value, that=E2=80=99s when you get variables, some three floors above the ground. And then, when you invoke =E2=80=98nreverse=E2=80=99 on a list pointed to b= y a variable, you, from high up above, can see it scurrying down there and re-routing the =E2=80=98cdr=E2=80=99s of the cons cells comprising the list= , but not touching the one link from the variable to whatever cons cell had been the first in the list.