searchK

searchK(X, k)

X is a vector.

k is an integer indicating the k-th smallest item.

Return the k-th smallest item ignoring NULL values.

searchK(1 7 3 5 3 9 6 1 NULL, 1);
// output
1

searchK(1 7 3 5 3 9 6 1 NULL, 2);
// output
1

searchK(1 7 3 5 3 9 6 1 NULL, 3);
// output
3