Javascript 整数到时间字符串

Question

我做了这个测试:

Implement an function toReadableString(int) that takes an integer that represents number of seconds
from 00:00:00 and returns a printable string format with AM / PM notation.
For ex.
01:00:00 = 3600
07:00:00 = 25200
toReadableString(3600) should return "1:00AM"
toReadableString(25200) should return "7:00AM"

我的解决方案是:

function padZero(string){
  return ("00" + string).slice(-2);
}
function toReadableString(time) {
  var hrs = ~~(time / 3600 % 24),
      mins = ~~((time % 3600) / 60),
      timeType = (hrs>11?"PM":"AM");
  return hrs + ":" + padZero(mins) + timeType;
}

但是大多数测试用例都失败了。测试用例是隐藏的，所以我不知道为什么我测试失败了。我已经尝试了我能想到的大部分测试用例。你知道我的解决方案有什么问题吗？

Answer 1

您的工作时间在 0 到 24 之间(其中 0 到 24 实际上是 12:00AM)

function toReadableString(time) {
  if (time < 0)
    time = 0;
  var hrs = ~~(time / 3600 % 24),
    mins = ~~((time % 3600) / 60),
    timeType = (hrs > 11 ? "PM" : "AM");
  if (hrs > 12)
    hrs = hrs - 12;
  if (hrs == 0)
    hrs = 12;
  return hrs + ":" + padZero(mins) + timeType;
}