LeetCode: Finding The Users Active Minutes Solution

1/**
2 * @param {number[][]} logs
3 * @param {number} k
4 * @return {number[]}
5 */
6var findingUsersActiveMinutes = function (logs, k) {
7  const res = Array(k).fill(0)
8
9  const map = logs.reduce((acc, [userId, min]) => {
10    if (!acc.has(userId)) {
11      acc.set(userId, new Set())
12    }
13    acc.set(userId, acc.get(userId).add(min))
14    return acc
15  }, new Map())
16
17  for (const userMinSet of map.values()) {
18    res[userMinSet.size - 1]++
19  }
20
21  return res
22}