ARROW-2665: [C++][Python] Add index() kernel #10358
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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 apache#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>
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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.