Function rstats::vecvecf64::memsearchdesc_indexed

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

Binary search of an indexed list (in descending 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 descending set.