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…#35818)
### Rationale for this change
The documentation of "unique" and "value_counts" kernels indicate that nulls in the input are ignored, but this is not the case: they are considered as distinct values that are counted.
* Closes: #35817
Authored-by: Joris Van den Bossche <jorisvandenbossche@gmail.com>
Signed-off-by: Antoine Pitrou <antoine@python.org>
The "value_counts" kernel indicates that nulls in the input are skipped:
arrow/cpp/src/arrow/compute/kernels/vector_hash.cc
Lines 748 to 753 in 431785f
But that's not actually the case. Nulls are also counted and included in the output:
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