GNU bug report logs - #34852
26.1; seq-intersection ignores nil as element

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From: "Miguel V. S. Frasson" <mvsfrasson <at> gmail.com>
To: Stefan Monnier <monnier <at> iro.umontreal.ca>
Cc: Michael Heerdegen <michael_heerdegen <at> web.de>, "Basil L. Contovounesios" <contovob <at> tcd.ie>, Nicolas Petton <nicolas <at> petton.fr>, 34852 <at> debbugs.gnu.org
Subject: bug#34852: 26.1; seq-intersection ignores nil as element
Date: Thu, 14 Mar 2019 20:08:57 -0300

Hi

Em qui, 14 de mar de 2019 18:43, Stefan Monnier
<monnier <at> iro.umontreal.ca> escreveu:
>
> > If ELT=nil, seq-contains currently returns nil anyway;
>
> That's true when `testfn` is nil, but not if you provide
> your own `testfn`.

Not really.

(seq-contains nil '(nil t foo) (lambda (x) t))  ->  nil

It returns *nil* if testfn fails, or *nil* (ELT) if it succeds.

Miguel

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