ApplyFilter applies a filter to our UIDList.

IndexOf performs a binary search on the uids slice and returns the index at which it finds the uid, else returns -1.

IntersectWithBin is based on the paper "Fast Intersection Algorithms for Sorted Sequences" https://link.springer.com/chapter/10.1007/978-3-642-12476-1_3.

IntersectWith intersects u with v.

IntersectWithBin is based on the paper "Fast Intersection Algorithms for Sorted Sequences" https://link.springer.com/chapter/10.1007/978-3-642-12476-1_3.

MergeSorted merges sorted lists.

ToUintsListForTest converts to list of uints for testing purpose only.