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From: Emanuel Berg via Users list for the GNU Emacs text editor <help-gnu-emacs@gnu.org>
To: help-gnu-emacs@gnu.org
Subject: Re: problems with Emacs 28
Date: Sat, 31 Oct 2020 19:26:19 +0100	[thread overview]
Message-ID: <87v9eqntf8.fsf@zoho.eu> (raw)
In-Reply-To: jwv5z6ufexe.fsf-monnier+emacs@gnu.org

Stefan Monnier wrote:

>>> side-effect free - the function doesn't do any changes to
>>> anything, this implies non-destructiveness
>>
>> Which is also known as a 'pure' function.
>
> Are `gensym` and `current-time` side-effect-free? In my book,
> they're definitely not pure.

Again, why keep track of this? The things mentioned so far, increased
modularity and ease of debug, aren't anything really substantial, is
it? Besides those depend on so much more anyway.

Also, it isn't as simple as side-effect vs. pure. Because some
side-effects are what you want, and some are harmless.

To me, this seems like yet another theoretical model that is
interesting in its own right, it helps us think and reason, like we
are doing right now, but applied as a rulebook what to do as
a practically working engineer, it'll limit you rather than
enhance you.

-- 
underground experts united
http://user.it.uu.se/~embe8573
https://dataswamp.org/~incal




  reply	other threads:[~2020-10-31 18:26 UTC|newest]

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-23 16:50 problems with Emacs 28 Emanuel Berg via Users list for the GNU Emacs text editor
2020-10-23 17:33 ` Jean Louis
2020-10-23 18:02   ` Emanuel Berg via Users list for the GNU Emacs text editor
2020-10-23 18:00 ` Emanuel Berg via Users list for the GNU Emacs text editor
2020-10-24  1:55   ` Emanuel Berg via Users list for the GNU Emacs text editor
2020-10-24 12:56     ` Stefan Monnier
2020-10-24 12:57     ` Stefan Monnier
2020-10-24  9:46   ` Michael Heerdegen
2020-10-24 17:00     ` Drew Adams
2020-10-24 19:26       ` Michael Heerdegen
2020-10-24 22:11         ` Emanuel Berg via Users list for the GNU Emacs text editor
2020-10-24 22:08       ` Emanuel Berg via Users list for the GNU Emacs text editor
2020-10-25 12:13       ` Michael Heerdegen
2020-10-25 14:15         ` Drew Adams
2020-10-27  0:29           ` Emanuel Berg via Users list for the GNU Emacs text editor
2020-10-27 10:22             ` Michael Heerdegen
2020-10-28 16:21             ` Jens C. Jensen
2020-10-28 17:07               ` Emanuel Berg via Users list for the GNU Emacs text editor
2020-10-28 17:18               ` Stefan Monnier
2020-10-31 18:26                 ` Emanuel Berg via Users list for the GNU Emacs text editor [this message]
2020-11-01 13:51                   ` Emanuel Berg via Users list for the GNU Emacs text editor
2020-10-23 18:16 ` Eli Zaretskii
2020-10-23 18:22   ` Emanuel Berg via Users list for the GNU Emacs text editor
2020-10-23 18:44 ` Stefan Monnier
2020-10-24  0:13   ` Emanuel Berg via Users list for the GNU Emacs text editor
2020-10-23 19:09 ` Gregory Heytings via Users list for the GNU Emacs text editor
2020-10-24  0:14   ` Emanuel Berg via Users list for the GNU Emacs text editor

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