Question

让我们说我有日期格式为timeStarted和timeEnded的JSON数据数组。我正在努力将timeSept花费几个小时。例如，

[{timeStarted: '00:10:30', timeEnded: '00:14:02'}, 
{timeStarted: '00:48:08', timeEnded: '02:33:33'}, ...]

我正在尝试对它们进行分组，以便获得类似

的数组

[{hrs: '0', timeSpent: '16'}, 
{hrs: '1', timeSpent: '60'}, 
{hrs: '2', timeSpent: '34'}, ...]

我尝试将它们分组十亿次，但我不知道怎么做：我总是每小时获得95分钟之类的值。至少我需要一种正确的思考方式。谢谢。

Answer 1

根据timeSpent和第一个数组的值，听起来像您想获取一个表示每个时钟小时量的数组（例如，从9:00到10:00或从14:00到15:00）是“花费” 。

如果是这样，您可以通过获取每个时间间隔的小时和分钟（如果要细化，甚至可以是秒）来计算每个小时中增加了多少分钟。

对于间隔在一个时钟小时内的简单情况，可以通过从开始时间中减去结束时间来实现。在一个小时的时间间隔中，情况会稍微复杂一些。请参阅下面的代码，了解一种可以解决此问题的方法。可能有更好的方法，并且代码只持续到一分钟，但这只是一个开始。

下面的hours数组的键对应于每个时钟小时。

const timesElapsed = [
  {timeStarted: '00:10:30', timeEnded: '00:14:02'}, 
  {timeStarted: '00:48:08', timeEnded: '02:33:33'}
]

// Initialize hours array: each key of the array represents a specific clock hour
let hours = []
for (let interval of timesElapsed) {
  // Get the pertinent data as Numbers
  const startHour = (Number)(interval.timeStarted.split(':')[0])
  const startMinute = (Number)(interval.timeStarted.split(':')[1])
  const endHour = (Number)(interval.timeEnded.split(':')[0])
  const endMinute = (Number)(interval.timeEnded.split(':')[1])

  // Initialize elements in Hour array if need be
  if (hours[startHour] === undefined) hours[startHour] = 0
  if (hours[endHour] === undefined) hours[endHour] = 0

  // An interval within an hour
  if (startHour === endHour) {
    hours[startHour] += (endMinute - startMinute)
  } else {
    // The first hour of a multi-hour interval
    hours[startHour] += 60 - startMinute

    // The middle hours, if any
    for (let i = startHour + 1; i < endHour; i++)
      hours[i] = 60

    // The final hour
    hours[endHour] += endMinute
  }
}

// console.log(hours)
// [16, 60, 33]

Answer 2

如果您的时间始终是hh:mm:ss格式的字符串，则可以使用简单的字符串拆分并进行一些数学运算：

const times = [
  { timeStarted: '00:10:30', timeEnded: '00:14:02' }, 
  { timeStarted: '00:48:08', timeEnded: '02:33:33' },
];
const withHours = times.map(time => {
  // Split on colon to get the components of the timestamp
  var start = time.timeStarted.split(':');
  var end = time.timeEnded.split(':');

  // Convert to seconds by multiplying each component by how many seconds it's worth
  var startSeconds = (+start[0]) * 60 * 60 + (+start[1]) * 60 + (+start[2]);
  var endSeconds = (+end[0]) * 60 * 60 + (+end[1]) * 60 + (+end[2]);

  // Find the difference in seconds and convert back to hours
  // We'll also floor this cause it looks like you want ints rounded down
  var hrs = Math.floor((endSeconds - startSeconds) / (60 * 60));

  return {
    timeStarted: time.timeStarted,
    timeEnded: time.timeEnded,
    hrs,
  };
});

编辑

刚注意到您还有一个名为timeSpent的附加字段。不知道那应该是什么。

如何按小时分组时间表

2 个答案: