<pre class="shiki github-dark shaku"><code>function getIntersection(a, b) { const setB = new Set(b); const result = []; const seen = new Set(); for (const value of a) { if (setB.has(value) &amp;&amp; !seen.has(value)) { result.push(value); seen.add(value); } } return result;}</code></pre>

This is another solution !

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 …