Function qwt::perf_and_test_utils::gen_rank_queries

pub fn gen_rank_queries<T: Clone>(n_queries: usize, s: &[T]) -> Vec<(usize, T)>

Generates a random vector of n_queries for rank queries on a given sequence s. Each query is a pair: a random position in [0, s.len()) and the symbol s[pos], where pos is another random position in [0, s.len()).