Function rstats::vecvec::memsearch_indexed

pub fn memsearch_indexed<T>(s: &[T], i: &[usize], val: T) -> Option<usize> where
    T: PartialOrd<T>, 

Binary search of an indexed list (in ascending order). Returns Some(index) of any item that is neither smaller nor greater than val. When none are found, returns None. Example use: membership of an indexed ordered set.