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bug#34852: 26.1; seq-intersection ignores nil as element
From: |
Michael Heerdegen |
Subject: |
bug#34852: 26.1; seq-intersection ignores nil as element |
Date: |
Fri, 15 Mar 2019 00:42:39 +0100 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (gnu/linux) |
Stefan Monnier <monnier@IRO.UMontreal.CA> writes:
> > (seq-contains nil '(nil t foo) (lambda (x) t)) -> nil
> > It returns *nil* if testfn fails, or *nil* (ELT) if it succeds.
>
> Just because it sometimes does doesn't mean it always does:
>
> (seq-contains '(0 3 4) 1 #'<)
>
> returns 3
Maybe it's too late here, but why is that a counterexample for
> If ELT=nil, seq-contains currently returns nil anyway;"
The first element is returned for that the test succeeds, what's special
about it? < is not symmetrical, though, so it's a weird kind of
equality test.
Michael.
- bug#34852: 26.1; seq-intersection ignores nil as element, (continued)
- bug#34852: 26.1; seq-intersection ignores nil as element, Miguel V. S. Frasson, 2019/03/14
- bug#34852: 26.1; seq-intersection ignores nil as element, Stefan Monnier, 2019/03/14
- bug#34852: 26.1; seq-intersection ignores nil as element, Miguel V. S. Frasson, 2019/03/14
- bug#34852: 26.1; seq-intersection ignores nil as element, Stefan Monnier, 2019/03/14
- bug#34852: 26.1; seq-intersection ignores nil as element, Miguel V. S. Frasson, 2019/03/14
- bug#34852: 26.1; seq-intersection ignores nil as element,
Michael Heerdegen <=
- bug#34852: 26.1; seq-intersection ignores nil as element, Stefan Monnier, 2019/03/14
- bug#34852: 26.1; seq-intersection ignores nil as element, Michael Heerdegen, 2019/03/15
- bug#34852: 26.1; seq-intersection ignores nil as element, Stefan Monnier, 2019/03/15
- bug#34852: 26.1; seq-intersection ignores nil as element, Miguel V. S. Frasson, 2019/03/14
- bug#34852: 26.1; seq-intersection ignores nil as element, Michael Heerdegen, 2019/03/14
- bug#34852: 26.1; seq-intersection ignores nil as element, Basil L. Contovounesios, 2019/03/15
- bug#34852: 26.1; seq-intersection ignores nil as element, Miguel V. S. Frasson, 2019/03/15
- bug#34852: 26.1; seq-intersection ignores nil as element, Miguel V. S. Frasson, 2019/03/16
- bug#34852: 26.1; seq-intersection ignores nil as element, Basil L. Contovounesios, 2019/03/16
- bug#34852: 26.1; seq-intersection ignores nil as element, Miguel V. S. Frasson, 2019/03/16