Javascript：在数组中获取与当前时间匹配的日期范围的对象

Question

Please correct me if this question has already been asked on Stack, but I haven't found any answer which would solve my problem. I want to display only the object of my array, where the date range, consisting of timeStart and timeEnd , matches to the current time. Let's say the current time would be 2020-10-22T16:35:45+01:00 , the function should display Steve (see the example given below) it's appointment. How can I search for the object where the current time is in between the given date ranges?

const currentTime = Date.now(); // 2020-10-22T16:35:45+01:00

This is the array I'm working with:

[
    {
        name: "Thomas",
        timeStart: "2020-10-22T16:00:00+0100",
        timeEnd: "2020-10-22T16:15:00+01:00"
    },
    {
        name: "Marc",
        timeStart: "2020-10-22T16:15:00+0100",
        timeEnd: "2020-10-22T16:30:00+01:00"
    },
    {
        name: "Steve",
        timeStart: "2020-10-22T16:30:00+0100",
        timeEnd: "2020-10-22T16:45:00+01:00"
    }
]

Answer 1

Does this work for you? It searches every date and makes sure that the current date is between the start and end.

 const currentTime = Date.now(); // 2020-10-22T16:35:45+01:00 const dates = [{ name: "Thomas", timeStart: "2020-10-22T16:00:00+0100", timeEnd: "2020-10-22T16:15:00+01:00" }, { name: "Marc", timeStart: "2020-10-22T16:15:00+0100", timeEnd: "2020-10-22T16:30:00+01:00" }, { name: "Steve", timeStart: "2020-10-22T16:30:00+0100", timeEnd: "2020-10-22T16:45:00+01:00" } ]; // If you want only one result, use find instead of filter const validDates = dates.filter((obj) => { // Converts strings to Dates let startDate = new Date(obj.timeStart); let endDate = new Date(obj.timeEnd); // Makes sure the current time is after the start date and before the end date return currentTime >= startDate && currentTime <= endDate; }); console.log(validDates); // To get name, use validDates[0].name (for filter, see above) or validDates.name (for find)

Answer 2

It will be something like this:

const currentTime = Date.now();

const resultArray=yourArray.filter(item=>{
      // you have to format dates to be able to compare them
      return item.timeStart < currentTime && item.timeEnd > currentTime
      });

Answer 3

Compare the start, end and current dates inside a find loop.
If the comparison returns true then the current object will be returned, otherwise undefined .

 const now = new Date("2020-10-22T16:17:00+01:00"); // 16:17. Should be Marc. const dates = [ { name: "Thomas", timeStart: "2020-10-22T16:00:00+0100", timeEnd: "2020-10-22T16:15:00+01:00" }, { name: "Marc", timeStart: "2020-10-22T16:15:00+0100", timeEnd: "2020-10-22T16:30:00+01:00" }, { name: "Steve", timeStart: "2020-10-22T16:30:00+0100", timeEnd: "2020-10-22T16:45:00+01:00" } ]; const result = dates.find(({ timeStart, timeEnd }) => { const start = new Date(timeStart); const end = new Date(timeEnd); return start <= now && end > now; }); console.log(result);

Answer 4

试试这样 yourArray.filter(item => currentTime >= item.timeStart && currenttime <= timeEnd)