1var assert = require('assert');
2
3function intersection(nums1, nums2) {
4  const set = new Set(nums1);
5  const fileredSet = new Set(nums2.filter((n) => set.has(n)));
6  return [...fileredSet];
7}
8
9try {
10  assert.deepEqual(intersection([6, 0, 12, 10, 16], [3, 15, 18, 20, 15]), []);
11
12  console.log(
13    'PASSED: `intersection([6,0,12,10,16],[3,15,18,20,15])` should return `[]`'
14  );
15} catch (err) {
16  console.log(err);
17}
18
19try {
20  assert.deepEqual(intersection([1, 5, 2, 12, 6], [13, 10, 9, 5, 8]), [5]);
21
22  console.log(
23    'PASSED: `intersection([1,5,2,12,6],[13,10,9,5,8])` should return `[5]`'
24  );
25} catch (err) {
26  console.log(err);
27}
28
29try {
30  assertSameMembers(
31    intersection(
32      [4, 17, 4, 4, 15, 16, 17, 6, 7],
33      [15, 2, 6, 20, 17, 17, 8, 4, 5]
34    ),
35    [15, 6, 17, 4]
36  );
37
38  console.log(
39    'PASSED: `intersection([4,17,4,4,15,16,17,6,7],[15,2,6,20,17,17,8,4,5])` should return `[15,6,17,4]`'
40  );
41} catch (err) {
42  console.log(err);
43}
44
45try {
46  assert.deepEqual(intersection([3], [15]), []);
47
48  console.log('PASSED: ' + '`intersection([3],[15])` should return `[]`');
49} catch (err) {
50  console.log(err);
51}
52
53try {
54  assert.deepEqual(intersection([2, 16, 8, 9], [14, 15, 2, 20]), [2]);
55
56  console.log(
57    'PASSED: ' + '`intersection([2,16,8,9],[14,15,2,20])` should return `[2]`'
58  );
59} catch (err) {
60  console.log(err);
61}
62
63function assertSameMembers(a, b) {
64  return JSON.stringify(a.sort()) === JSON.stringify(b.sort());
65}