GNU bug report logs - #25929
25.2; map-delete doesn't delete permanently 1st alist elt

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From: Nicolas Petton <nicolas <at> petton.fr>
To: Lars Ingebrigtsen <larsi <at> gnus.org>, Michael Heerdegen <michael_heerdegen <at> web.de>
Cc: 25929 <at> debbugs.gnu.org, Stefan Monnier <monnier <at> iro.umontreal.ca>, Tino Calancha <tino.calancha <at> gmail.com>
Subject: bug#25929: 25.2; plists and map-*
Date: Wed, 29 Mar 2017 17:36:41 +0200

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Lars Ingebrigtsen <larsi <at> gnus.org> writes:

> A thing just occurred to me: Does the map-* functions work for plists,
> too?  plists are, like, the fourth major mapping structure we have in
> Lisp.

Not currently.

> Wouldn't it be easy to extend map-* to handle plists, too?  For
> instance, map-delete (of course) knows whether it's looking at a hash
> table or an array, but it can also easily distinguish between an alist
> and a plist by just looking at the first element, can't it?

Yes, it would, and was proposed a few weeks ago.

> It's a bit hacky, though.  But might be nice.

It would.  I didn't do it initially exactly because I thought it was a
bit hackish, but I agree that it would be nice to have.

Cheers,
Nico

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