A. Coady created ARROW-15736:
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Summary: [C++] Aggregate functions for min and max index.
Key: ARROW-15736
URL: https://issues.apache.org/jira/browse/ARROW-15736
Project: Apache Arrow
Issue Type: New Feature
Components: C++
Reporter: A. Coady
Numpy and Pandas both have `argmin` and `argmax`, for the common use case of
finding values in parallel arrays which correspond to min or max values.
Proposals:
* `min_max_index` for arrays
* `hash_min_max_index` for aggregations
* some ability to break ties:
** `min_max_index` for tables with multiple sort keys, similar to
`sort_indices`
** `min_max_indices` for arrays to match all equal values
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