Function intersection 

pub fn intersection<T: Clone + Eq + Hash>(a: &[T], b: &[T]) -> Vec<T>

Returns elements that are in both a and b.

Example

use d3rs::array::intersection;

let a = vec![1, 2, 3, 4, 5];
let b = vec![3, 4, 5, 6, 7];
assert_eq!(intersection(&a, &b), vec![3, 4, 5]);