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bug#34852: 26.1; seq-intersection ignores nil as element

From: Basil L. Contovounesios
Subject: bug#34852: 26.1; seq-intersection ignores nil as element
Date: Thu, 14 Mar 2019 17:08:55 +0000
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (gnu/linux)

Nicolas Petton <address@hidden> writes:

> Michael Heerdegen <address@hidden> writes:
> Hi Michael,
>> We also have `seq-some' which can be used as a contain predicate,
>> e.g. to fix this bug:
> Using seq-contains was wrong, and I think seq-some should have been used
> instead, so I like your patch better (it's IMO better to use seq-some
> used as a predicate than seq-position).
> Unless somebody disagrees, I'll install your patch.

If you go with the seq-some patch then please edit it to avoid using
apply-partially, which is quite inefficient.

The implementations of seq-set-equal-p, seq-uniq, and seq-difference
will also need to be updated, in addition to that of seq-intersection.


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