javascript - 如何检查当前时间是否在数组中存储的两个给定时间之间

Question

我正在尝试使用 moment 的“isBetween”函数检查当前时间是否介于两个时间之间，但它不起作用。我需要找到这个时间所属的类次。
任何建议或任何其他方法。

var Time = [{
    "shiftName": "Shift A",
    "shiftCode": "shiftA",
    "startTime": "07:00",
    "endTime": "15:00",
  },
  {
    "shiftName": "Shift B",
    "shiftCode": "shiftB",
    "startTime": "15:00",
    "endTime": "23:00",
  },
  {
    "shiftName": "Shift C",
    "shiftCode": "shiftC",
    "startTime": "23:00",
    "endTime": "07:00",
  }

]

Time.forEach(element => {
  var st = moment(element.startTime, 'HH:mm');
  var et = moment(element.endTime, 'HH:mm');

  if (moment().isBetween(st, et)) {
    console.log(element.shiftName)
  }
});

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Answer 1

以下函数为您提供当前类次的名称，但您也可以传递一个 moment.js 对象来获取特定时间的类次。
对于属于多个类次的边缘情况(如“7:00”、“15:00”等)，我的脚本返回第一个找到的类次。

function getShiftName(time = moment()) {
    const isBetween = (a, b, c) => ((a <= b && b <= c) || a > c && (a <= b || b <= c));
    for (shift of Time) {
        if (isBetween(shift.startTime, time.format("HH:mm"), shift.endTime)) {
            return shift.shiftName;
        }
    }
    return "none";
}

// your sample data, minified for a shorter code-block
var Time = [{"shiftName": "Shift A", "shiftCode": "shiftA", "startTime": "07:00", "endTime": "15:00"},{ "shiftName": "Shift B", "shiftCode": "shiftB", "startTime": "15:00", "endTime": "23:00", }, { "shiftName": "Shift C", "shiftCode": "shiftC", "startTime": "23:00", "endTime": "07:00", }];

// demo
console.log("now", getShiftName()); // the current shift name
console.log(" 12", getShiftName(moment(12,"HH"))); // shift A
console.log(" 18", getShiftName(moment(18,"HH"))); // shift B
console.log(" 23", getShiftName(moment(23,"HH"))); // shift B
console.log(" 24", getShiftName(moment(24,"HH"))); // shift C
console.log("  4", getShiftName(moment( 4,"HH"))); // shift C

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