<pre class="shiki github-dark shaku"><code>/** * @param {any[]} arr1 * @param {any[]} arr2 * @returns {any[]} */function getIntersection(a, b) { const counts = {}; const result = []; for (const x of a) { counts[x] = (counts[x] || 0) + 1; } for (const x of b) { if (counts[x]) { result.push(x); counts[x]--; } } return result;}</code></pre>

This is my 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 …