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From: Eli Zaretskii <eliz@gnu.org>
To: Pedro Andres Aranda Gutierrez <paaguti@gmail.com>
Cc: emacs-devel@gnu.org
Subject: Re: PATCH: Explicitly show how let works on global-variables
Date: Tue, 04 Oct 2022 10:52:35 +0300	[thread overview]
Message-ID: <83czb8vxdo.fsf@gnu.org> (raw)
In-Reply-To: <CAO48Bk_9Wksepn2PQV-DPxGYAi4KXN6gfUQkZaFp1DV6HQrNAg@mail.gmail.com> (message from Pedro Andres Aranda Gutierrez on Tue, 4 Oct 2022 08:46:02 +0200)

> From: Pedro Andres Aranda Gutierrez <paaguti@gmail.com>
> Date: Tue, 4 Oct 2022 08:46:02 +0200
> 
> this is a small patch for the 'Introduction to Emacs LISP programming' guide to show how let works on
> system-wide variables. 
> Understanding this would have made my life easier the past +20 years ;-) and an example is sometimes
> worth 100 lines of explanation (more so if you are in a hurry and you do diagonal reading)

This manual already says, in the previous subsection:

     Local variables created by a ‘let’ expression retain their value
  _only_ within the ‘let’ expression itself (and within expressions called
  within the ‘let’ expression); the local variables have no effect outside
  the ‘let’ expression.

Doesn't this cover the issue?



  reply	other threads:[~2022-10-04  7:52 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-10-04  6:46 PATCH: Explicitly show how let works on global-variables Pedro Andres Aranda Gutierrez
2022-10-04  7:52 ` Eli Zaretskii [this message]
2022-10-04  8:09   ` Pedro Andres Aranda Gutierrez
2022-10-04 11:36     ` Phil Sainty
2022-10-04 13:43       ` Stefan Monnier
2022-10-04 22:22       ` Tim Cross
2022-10-05  5:28         ` Pedro Andres Aranda Gutierrez
2022-10-06  9:00           ` Pedro Andres Aranda Gutierrez
2022-10-06 19:34             ` Emanuel Berg
2022-10-04 17:39   ` Richard Stallman
2022-10-04  7:59 ` tomas
2022-10-04 11:56   ` Phil Sainty
2022-10-04 13:48     ` Stefan Monnier
2022-10-05 21:31     ` Richard Stallman
2022-10-04 15:00 ` [External] : " Drew Adams

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