Retrieve the array element that contains a date range matching the current time using JavaScript

Question

Retrieve the array element that contains a date range matching the current time using JavaScript

I've been searching on Stack for an answer to my question, but I haven't found a solution yet. My issue is that I need to display only the object in my array where the current time falls within the specified date range defined by timeStart and timeEnd. For example, if the current time is 2020-10-22T16:35:45+01:00, the function should display Steve's appointment. How can I find the object with the current time within the given date ranges?

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

Here is the array I'm dealing 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"
    }
]

javascript arrays date

Answer 1

Answer №1

Examine the start, end, and current dates within a loop utilizing the find method.
If the comparison yields true, 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 2

Examine the start, end, and current dates within a loop utilizing the find method.
If the comparison yields true, 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 3

Answer №2

Do you find this effective? It scans through each date to ensure that the current date falls within the specified range.

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 only one result is needed, use find instead of filter
const validDates = dates.filter((obj) => {
  // Convert strings to Dates
  let startDate = new Date(obj.timeStart);
  let endDate = new Date(obj.timeEnd);
  // Ensure current time is after start date and before end date
  return currentTime >= startDate && currentTime <= endDate;
});

console.log(validDates);

// To retrieve the name, use validDates[0].name (for filter, refer above) or validDates.name (for find)

Answer 4

Do you find this effective? It scans through each date to ensure that the current date falls within the specified range.

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 only one result is needed, use find instead of filter
const validDates = dates.filter((obj) => {
  // Convert strings to Dates
  let startDate = new Date(obj.timeStart);
  let endDate = new Date(obj.timeEnd);
  // Ensure current time is after start date and before end date
  return currentTime >= startDate && currentTime <= endDate;
});

console.log(validDates);

// To retrieve the name, use validDates[0].name (for filter, refer above) or validDates.name (for find)

Answer 5

Answer №3

Here is a suggestion you can try out: filter yourArray based on the condition that currentTime falls within the range of item.timeStart and timeEnd

Answer 6

Here is a suggestion you can try out: filter yourArray based on the condition that currentTime falls within the range of item.timeStart and timeEnd

Answer 7

Answer №4

This is an example of how it could look:

let currentTimestamp = Date.now();

const filteredArray = yourArray.filter(element => {
      // Make sure to convert timestamps for accurate comparison
      return element.startTime < currentTimestamp && element.endTime > currentTimestamp;
      });

Answer 8

This is an example of how it could look:

let currentTimestamp = Date.now();

const filteredArray = yourArray.filter(element => {
      // Make sure to convert timestamps for accurate comparison
      return element.startTime < currentTimestamp && element.endTime > currentTimestamp;
      });

Retrieve the array element that contains a date range matching the current time using JavaScript

Answer №1

Answer №2

Answer №3

Answer №4

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