This PR is attempting to simplify the logic and harmonize the internals of overlap and closest at all three layers (internal array function, internal intidx function, and public function):
Change the low-level representation of the join output from a single (n, 2) array of indices to two (n,) arrays. This turns out to involve less intermediate manipulation and leads to more readable code.
Streamline join type handling (left, right, outer) and better align overlap and closest implementation details.
This PR is attempting to simplify the logic and harmonize the internals of
overlapandclosestat all three layers (internal array function, internal intidx function, and public function):