Function frequency_finder 

pub fn frequency_finder<T>(
    list: &[T],
) -> HashMap<T, u64, BuildHasherDefault<XxHash64>>
where
    T: Copy + Hash + Eq + Sync + Send + Debug,

Examples

use elements_frequency::interface::frequency_finder;

let myList = [1, 1, -6, 2, 6, 2, 7, 1];

let frequency_map = frequency_finder(&myList);