Intersection of Two Arrays
<p>Given two integer arrays <code>nums1</code> and <code>nums2</code>, return <em>an array of their <span data-keyword="array-intersection">intersection</span></em>. Each element in the result must be <strong>unique</strong> and you may return the result in <strong>any order</strong>.</p>

<p>&nbsp;</p>
<p><strong class="example">Example 1:</strong></p>

<pre>
<strong>Input:</strong> nums1 = [1,2,2,1], nums2 = [2,2]
<strong>Output:</strong> [2]
</pre>

<p><strong class="example">Example 2:</strong></p>

<pre>
<strong>Input:</strong> nums1 = [4,9,5], nums2 = [9,4,9,8,4]
<strong>Output:</strong> [9,4]
<strong>Explanation:</strong> [4,9] is also accepted.
</pre>

<p>&nbsp;</p>
<p><strong>Constraints:</strong></p>

<ul>
	<li><code>1 &lt;= nums1.length, nums2.length &lt;= 1000</code></li>
	<li><code>0 &lt;= nums1[i], nums2[i] &lt;= 1000</code></li>
</ul>
Array; Hash Table; Two Pointers; Binary Search; Sorting
/**
 * @param {number[]} nums1
 * @param {number[]} nums2
 * @return {number[]}
 */
var intersection = function (nums1, nums2) {
    const s = new Set(nums1);
    return [...new Set(nums2.filter(x => s.has(x)))];
};
