LeetCode: Maximum Population Year Solution

1/**
2 * @param {number[][]} logs
3 * @return {number}
4 */
5var maximumPopulation = function (logs) {
6  let yearPop = new Map()
7  logs.forEach(([birth]) => yearPop.set(birth, 0))
8
9  for (const [year] of yearPop) {
10    for (const [birth, death] of logs) {
11      if (birth <= year && year < death) {
12        yearPop.set(year, yearPop.get(year) + 1)
13      }
14    }
15  }
16
17  const maxPop = Math.max.apply(null, [...yearPop.values()])
18  const yearsWithMaxPop = [...yearPop.entries()]
19    .filter(([_, pop]) => pop === maxPop)
20    .map(([year, _]) => year)
21
22  return Math.min.apply(null, yearsWithMaxPop)
23}