From: Emanuel Berg <incal@dataswamp.org>
To: help-gnu-emacs@gnu.org
Subject: Re: Another question about lambdas
Date: Wed, 18 Jan 2023 12:47:00 +0100 [thread overview]
Message-ID: <877cxkysi3.fsf@dataswamp.org> (raw)
In-Reply-To: Y5a7HFFFtEPcjALt@tuxteam.de
tomas wrote:
> When I try to explain that, one of the devices I use is the
> idea of "space" (static) vs. "time" (dynamic). It sticks
> with some people.
What about just explaining the the dynamic `let' and the lexical
(static) let? Theory doesn't help IME.
With the lexical `let', those variables stay _here_ ...
Unless they are already dynamic/special.
Don't see any other use case of dynamic/special variables than
options, but then isn't it that they are _global_ and now set
temporarily to whatever value for the duration of the scope
defined by the opening and closing parenthesis?
So one should drop the talk of dynamic/special vs
lexical/static and instead have one `locals' (with the same
syntax and as let, but always lexical/static, even for
dynamic/special ones) and then one `options', also with the
same syntax, to set globals for a limited scope.
That covers the global variables and the local ones so what's
more to cover?
--
underground experts united
https://dataswamp.org/~incal
next prev parent reply other threads:[~2023-01-18 11:47 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-12-10 17:23 Another question about lambdas Michael Heerdegen
2022-12-10 19:33 ` tomas
2022-12-10 20:29 ` Michael Heerdegen
2022-12-10 20:03 ` Emanuel Berg
2022-12-12 1:50 ` Michael Heerdegen
2023-01-18 11:52 ` Emanuel Berg
2023-01-19 13:23 ` Michael Heerdegen
2022-12-10 21:58 ` Arash Esbati
2022-12-11 0:00 ` Michael Heerdegen
2022-12-11 0:09 ` Michael Heerdegen
2022-12-11 7:02 ` tomas
2022-12-12 1:56 ` Michael Heerdegen
2022-12-12 5:24 ` tomas
2022-12-12 6:22 ` Michael Heerdegen
2023-01-18 11:51 ` Emanuel Berg
2023-01-19 13:24 ` Michael Heerdegen
2023-01-19 13:38 ` Michael Heerdegen
2023-01-30 17:44 ` Emanuel Berg
2023-02-03 0:20 ` Michael Heerdegen
2023-02-25 7:31 ` Emanuel Berg
2023-02-27 8:28 ` tomas
2023-01-18 11:47 ` Emanuel Berg [this message]
2023-01-18 11:33 ` Emanuel Berg
2023-01-19 13:32 ` Michael Heerdegen
2022-12-13 11:26 ` Arash Esbati
2022-12-14 2:22 ` Michael Heerdegen
2022-12-11 0:13 ` Gregory Heytings
2022-12-11 0:38 ` Michael Heerdegen
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