<pre class="shiki github-dark shaku"><code>/** * @param {any[]} arr1 * @param {any[]} arr2 * @returns {any[]} */function getIntersection(arr1, arr2) { const result = new Set(); for (let el1 of arr1) { for (let el2 of arr2) { if (el1 === el2) { result.add(el1); } } } return Array.from(result);}console.log(getIntersection([1, 2, 3, 4, 5, 6], [3, 5, 7, 9]));</code></pre>

5 min

Given two arrays, find the intersection(items occur in both arrays) 1. arrays are not sorted, and might have duplicates. 2. you can modify the arrays …