From: Rudolf Schlatte <rudi@constantly.at>
To: help-gnu-emacs@gnu.org
Subject: Re: `apply-partially` and hash tables
Date: Sun, 20 Oct 2024 21:12:33 +0200 [thread overview]
Message-ID: <m1ed4a6126.fsf@constantly.at> (raw)
In-Reply-To: jwvv7xm671c.fsf-monnier+emacs@gnu.org
Stefan Monnier <monnier@iro.umontreal.ca> writes:
>> My question is the same, though: can it be relied upon?
>
> It's fundamental to the notion of what is a *value* (as in "call by
> value"), so yes, very much so.
The usual caveat for lists applies: prepending values to the front or
otherwise mutating the list will not work as expected in general, since
what you're holding is just a cons cell. (This is an instance of the
"delete bug" where you have to write `(setq x (delete 'foo x))' instead
of just `(delete 'foo x)'.)
next prev parent reply other threads:[~2024-10-20 19:12 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-10-20 9:43 `apply-partially` and hash tables Joost Kremers
2024-10-20 9:54 ` tomas
2024-10-20 14:46 ` Stefan Monnier via Users list for the GNU Emacs text editor
2024-10-20 15:19 ` Joost Kremers
2024-10-20 17:04 ` Stefan Monnier
2024-10-20 19:12 ` Rudolf Schlatte [this message]
2024-10-20 20:29 ` Stefan Monnier via Users list for the GNU Emacs text editor
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