Function indxvec::merge::minmax_indexed

pub fn minmax_indexed<T>(
    v: &[T], 
    idx: &[usize], 
    i: usize, 
    n: usize
) -> MinMax<T> where
    T: PartialOrd + Copy, 

Using only a subset of v, defined by its idx subslice between i,i+n. Returns min of v, its index’s index, max of v, its index’s index.