Re: PATCH: Explicitly show how let works on global-variables

[Pedro Andres Aranda Gutierrez <paaguti@gmail.com>]

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Hi Eli,

may be. But in my case it didn't. I was misled by the term 'local variable'
coming from (and using) other programming languages.

As I understood the text (and to continue with the system-time-locale) I
understood as local variable a 'value that was stored in the function's
stack' to be used in the scope of the let. That implied (once again in my
understanding) that the global system-time-locale would not be affected and
hence format-time-string would not see the change in the value within the
let.

An example like this would have helped me (and possibly shaped the way I
use elisp)...

Just my .02 cents, /PA

On Tue, 4 Oct 2022 at 09:52, Eli Zaretskii <eliz@gnu.org> wrote:

> > 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?
>


-- 
Fragen sind nicht da um beantwortet zu werden,
Fragen sind da um gestellt zu werden
Georg Kreisler

Headaches with a Juju log:
unit-basic-16: 09:17:36 WARNING juju.worker.uniter.operation we should run
a leader-deposed hook here, but we can't yet

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