Function indxvec::merge::intersect_indexed

pub fn intersect_indexed<T>(
    v1: &[T], 
    ix1: &[usize], 
    v2: &[T], 
    ix2: &[usize]
) -> Vec<T> where
    T: PartialOrd + Copy, 

Intersects two ascending index-sorted generic vectors. Returns a single explicitly ordered set.