[ARROW-13035] [C++] Create a compute function returning indices of non-zero values

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 7.0.0
• Component/s: C++
• Labels: good-first-issue kernel pull-request-available
• External issue URL: https://github.com/apache/arrow/issues/28746
• Assignee: Alessandro Molina
• Reporter: Antoine Pitrou
• Created: 10/Jun/21 14:42
• Updated: 11/Jan/23 08:30
• Resolved: 04/Jan/22 19:42

Description

This would be similar to Numpy's nonzero function:
https://numpy.org/doc/stable/reference/generated/numpy.nonzero.html

>>> arr = np.array([4,5,0,6,0,5])
>>> np.nonzero(arr)
(array([0, 1, 3, 5]),)

Issue Links

• is required by: ARROW-15218 [C++] Add Decimal support to indices_nonzero compute function
• links to: GitHub Pull Request #11886