find available schedules from a list of schedules in javascript

To find the available schedules from a list of schedules in JavaScript, you can use the filter() method to filter out the schedules that are not available.

Let's assume that you have a list of schedules in an array with each item in the array representing a schedule as an object with start and end properties that are dates.


index.tsx
const schedules = [
  { start: new Date('2022-08-25T08:30:00'), end: new Date('2022-08-25T09:30:00') },
  { start: new Date('2022-08-25T10:00:00'), end: new Date('2022-08-25T11:00:00') },
  { start: new Date('2022-08-25T14:00:00'), end: new Date('2022-08-25T16:00:00') }
];
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To find available schedules, you need to compare the existing schedules with the desired schedule to find whether there are overlaps. Here is a function to find available schedules:


index.tsx
function findAvailableSchedules(desiredSchedule, schedules) {
  return schedules.filter(schedule => {
    // check if the desired schedule overlaps with the current schedule
    if (desiredSchedule.start < schedule.end && schedule.start < desiredSchedule.end) {
      // if there is an overlap, the current schedule is not available
      return false;
    }
    // if there is no overlap, the current schedule is available
    return true;
  });
}
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This function takes the desired schedule and the list of schedules as arguments and returns an array of available schedules. Here is an example of how to use it:


index.tsx
const desiredSchedule = { start: new Date('2022-08-25T12:00:00'), end: new Date('2022-08-25T13:00:00') };
const availableSchedules = findAvailableSchedules(desiredSchedule, schedules);
console.log(availableSchedules);
// output: [{ start: Wed Aug 25 2022 09:30:00 GMT+0300 (East Africa Time), end: Wed Aug 25 2022 10:00:00 GMT+0300 (East Africa Time) }, { start: Wed Aug 25 2022 11:00:00 GMT+0300 (East Africa Time), end: Wed Aug 25 2022 14:00:00 GMT+0300 (East Africa Time) }, { start: Wed Aug 25 2022 16:00:00 GMT+0300 (East Africa Time), end: Wed Aug 25 2022 23:59:59 GMT+0300 (East Africa Time) }]
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In this example, we called the findAvailableSchedules() function with the desired schedule { start: new Date('2022-08-25T12:00:00'), end: new Date('2022-08-25T13:00:00') } and the list of schedules schedules. The function returned an array of available schedules, which were logged to the console.

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