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David LiYibo Cai
e7e3784d8aa
David Li authored and Yibo Cai committed 618b2863235
ARROW-2665: [C++][Python] Add index() kernel

Add a simple index() kernel.

Note that the Python start/end options are handled entirely in Python, not in the kernel itself.

Short-circuiting is somewhat implemented: the kernel executor will still loop through all batches but the kernel will stop looking at data once it finds an item.

Closes #10358 from lidavidm/arrow-2665

Lead-authored-by: David Li <li.davidm96@gmail.com>
Co-authored-by: Yibo Cai <yibo.cai@arm.com>
Signed-off-by: Yibo Cai <yibo.cai@arm.com>