Function indxvec::merge::diff_indexed

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

Sets difference: deleting elements of the second from the first. Two ascending index sorted generic vectors.