Hackerrank: Time Conversion Solution

1function timeConversion(s) {
2  let [time, part] = [s.substring(0, s.length - 2), s.substring(s.length - 2)]
3  time = time.split(":").map(Number)
4  if (part === "PM" && time[0] === 12) time[0] = 12
5  if (part === "PM" && time[0] !== 12) time[0] = (time[0] + 12) % 24
6  if (part === "AM" && time[0] === 12) time[0] = 0
7  return time
8    .map(String)
9    .map(s => s.padStart(2, "0"))
10    .join(":")
11}