Filter multidimensional array of objects in Javascript

Question

I have a multidimensional array of objects that I want to filter as explained below:

let participants =
[
   {
      "participant_id": 2,
      "name": "Bond James",
      "allschedules": [
         {
            "schedule_id": 1,
            "name": "James_Bond_SIL_January_22 (AM) - 07:00 - 15:00",
            "schedule_type": "Individual Schedule",
            "number_of_shifts": 31,
            "start_date": "2022-01-01 07:00:00",
            "end_date": "2022-01-31 15:00:00",
            "shifts": [
               "2022-01-01 07:00:00",
               "2022-01-02 07:00:00",
               "2022-01-03 07:00:00",
               "2022-01-04 07:00:00"
            ]
         },
         {
            "schedule_id": 2,
            "name": "Bonds-1:2 Schedule",
            "schedule_type": "Individual Schedule",
            "number_of_shifts": 5,
            "start_date": "2022-01-12 07:00:00",
            "end_date": "2022-01-16 11:00:00",
            "shifts": [
               "2022-01-12 07:00:00",
               "2022-01-13 07:00:00",
               "2022-01-14 07:00:00",
               "2022-01-15 07:00:00",
               "2022-01-16 07:00:00"
            ]
         },
         {
            "schedule_id": 9,
            "name": "test april",
            "schedule_type": "Individual Schedule",
            "number_of_shifts": 4,
            "start_date": "2022-04-09 16:00:00",
            "end_date": "2022-04-12 20:00:00",
            "shifts": [
               "2022-04-09 16:00:00",
               "2022-04-10 16:00:00",
               "2022-04-11 16:00:00",
               "2022-04-12 16:00:00"
            ]
         },
         {
            "schedule_id": 10,
            "name": "CP - James Bond",
            "schedule_type": "Individual Schedule",
            "number_of_shifts": 10,
            "start_date": "2022-04-11 07:00:00",
            "end_date": "2022-05-11 09:00:00",
            "shifts": [
               "2022-04-11 07:00:00",
               "2022-04-13 07:00:00",
               "2022-04-18 07:00:00",
               "2022-04-20 07:00:00",
               "2022-04-25 07:00:00",
               "2022-04-27 07:00:00",
               "2022-05-02 07:00:00",
               "2022-05-04 07:00:00",
               "2022-05-09 07:00:00",
               "2022-05-11 07:00:00"
            ]
         },
         {
            "schedule_id": 11,
            "name": "James_Miller_App_Test",
            "schedule_type": "Individual Schedule",
            "number_of_shifts": 30,
            "start_date": "2022-04-21 07:00:00",
            "end_date": "2022-05-20 15:00:00",
            "shifts": [
               "2022-04-30 07:00:00",
               "2022-05-01 07:00:00",
               "2022-05-02 07:00:00",
               "2022-05-03 07:00:00",
               "2022-05-04 07:00:00",
               "2022-05-05 07:00:00",
               "2022-05-06 07:00:00",
               "2022-05-07 07:00:00",
               "2022-05-08 07:00:00",
               "2022-05-09 07:00:00",
               "2022-05-10 07:00:00",
               "2022-05-11 07:00:00",
               "2022-05-12 07:00:00",
               "2022-05-13 07:00:00",
               "2022-05-14 07:00:00",
               "2022-05-15 07:00:00",
               "2022-05-16 07:00:00",
               "2022-05-17 07:00:00",
               "2022-05-18 07:00:00",
               "2022-05-19 07:00:00",
               "2022-05-20 07:00:00"
            ]
         },
         {
            "schedule_id": 12,
            "name": "Grouped Schedule for April 2022",
            "schedule_type": "Shared/Grouped Schedule",
            "number_of_shifts": 3,
            "start_date": "2022-04-28 12:00:00",
            "end_date": "2022-04-30 18:00:00",
            "shifts": [
               "2022-04-28 12:00:00",
               "2022-04-29 12:00:00",
               "2022-04-30 12:00:00"
            ]
         }
      ]
   },
   {
      "participant_id": 3,
      "name": "Barkley Charles",
      "allschedules": [
         {
            "schedule_id": 12,
            "name": "Grouped Schedule for April 2022",
            "schedule_type": "Shared/Grouped Schedule",
            "number_of_shifts": 3,
            "start_date": "2022-04-28 12:00:00",
            "end_date": "2022-04-30 18:00:00",
            "shifts": [
               "2022-04-28 12:00:00",
               "2022-04-29 12:00:00",
               "2022-04-30 12:00:00"
            ]
         }
      ]
   }
]

From my array above, I have an object called: allschedules that has its own objects. The object of interest inside allschedules is: shifts which has an array of dates. The objective is to only return participants that fulfil the condition where the dates inside the shifts array is for the current month.

This is what I've done:

participants.filter((participant) => {
        return participant.allschedules.filter((schedule) => {
          schedule.shifts.find(
            (shift) => moment(shift).format("M") == moment().format("M")
          );
        });
      })

but this returns the exact same object from the defined participants variable. So nothing is filtered. What would be the correct way of approaching this?

let participants =
[
   {
      "participant_id": 2,
      "name": "Bond James",
      "allschedules": [
         {
            "schedule_id": 1,
            "name": "James_Bond_SIL_January_22 (AM) - 07:00 - 15:00",
            "schedule_type": "Individual Schedule",
            "number_of_shifts": 31,
            "start_date": "2022-01-01 07:00:00",
            "end_date": "2022-01-31 15:00:00",
            "shifts": [
               "2022-01-01 07:00:00",
               "2022-01-02 07:00:00",
               "2022-01-03 07:00:00",
               "2022-01-04 07:00:00"
            ]
         },
         {
            "schedule_id": 2,
            "name": "Bonds-1:2 Schedule",
            "schedule_type": "Individual Schedule",
            "number_of_shifts": 5,
            "start_date": "2022-01-12 07:00:00",
            "end_date": "2022-01-16 11:00:00",
            "shifts": [
               "2022-01-12 07:00:00",
               "2022-01-13 07:00:00",
               "2022-01-14 07:00:00",
               "2022-01-15 07:00:00",
               "2022-01-16 07:00:00"
            ]
         },
         {
            "schedule_id": 9,
            "name": "test april",
            "schedule_type": "Individual Schedule",
            "number_of_shifts": 4,
            "start_date": "2022-04-09 16:00:00",
            "end_date": "2022-04-12 20:00:00",
            "shifts": [
               "2022-04-09 16:00:00",
               "2022-04-10 16:00:00",
               "2022-04-11 16:00:00",
               "2022-04-12 16:00:00"
            ]
         },
         {
            "schedule_id": 10,
            "name": "CP - James Bond",
            "schedule_type": "Individual Schedule",
            "number_of_shifts": 10,
            "start_date": "2022-04-11 07:00:00",
            "end_date": "2022-05-11 09:00:00",
            "shifts": [
               "2022-04-11 07:00:00",
               "2022-04-13 07:00:00",
               "2022-04-18 07:00:00",
               "2022-04-20 07:00:00",
               "2022-04-25 07:00:00",
               "2022-04-27 07:00:00",
               "2022-05-02 07:00:00",
               "2022-05-04 07:00:00",
               "2022-05-09 07:00:00",
               "2022-05-11 07:00:00"
            ]
         },
         {
            "schedule_id": 11,
            "name": "James_Miller_App_Test",
            "schedule_type": "Individual Schedule",
            "number_of_shifts": 30,
            "start_date": "2022-04-21 07:00:00",
            "end_date": "2022-05-20 15:00:00",
            "shifts": [
               "2022-04-30 07:00:00",
               "2022-05-01 07:00:00",
               "2022-05-02 07:00:00",
               "2022-05-03 07:00:00",
               "2022-05-04 07:00:00",
               "2022-05-05 07:00:00",
               "2022-05-06 07:00:00",
               "2022-05-07 07:00:00",
               "2022-05-08 07:00:00",
               "2022-05-09 07:00:00",
               "2022-05-10 07:00:00",
               "2022-05-11 07:00:00",
               "2022-05-12 07:00:00",
               "2022-05-13 07:00:00",
               "2022-05-14 07:00:00",
               "2022-05-15 07:00:00",
               "2022-05-16 07:00:00",
               "2022-05-17 07:00:00",
               "2022-05-18 07:00:00",
               "2022-05-19 07:00:00",
               "2022-05-20 07:00:00"
            ]
         },
         {
            "schedule_id": 12,
            "name": "Grouped Schedule for April 2022",
            "schedule_type": "Shared/Grouped Schedule",
            "number_of_shifts": 3,
            "start_date": "2022-04-28 12:00:00",
            "end_date": "2022-04-30 18:00:00",
            "shifts": [
               "2022-04-28 12:00:00",
               "2022-04-29 12:00:00",
               "2022-04-30 12:00:00"
            ]
         }
      ]
   },
   {
      "participant_id": 3,
      "name": "Barkley Charles",
      "allschedules": [
         {
            "schedule_id": 12,
            "name": "Grouped Schedule for April 2022",
            "schedule_type": "Shared/Grouped Schedule",
            "number_of_shifts": 3,
            "start_date": "2022-04-28 12:00:00",
            "end_date": "2022-04-30 18:00:00",
            "shifts": [
               "2022-04-28 12:00:00",
               "2022-04-29 12:00:00",
               "2022-04-30 12:00:00"
            ]
         }
      ]
   }
]

console.log(
      participants.filter((participant) => {
        return participant.allschedules.filter((schedule) => {
          schedule.shifts.find(
            (shift) => moment(shift).format("M") == moment().format("M")
          );
        });
      })
    )

.as-console-wrapper { max-height: 100% !important; top: 0 }

<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.29.1/moment.min.js"></script>

My desired filtered array(filtered by current month), would be this:

[
   {
      "participant_id": 2,
      "name": "Bond James",
      "allschedules": [
         {
            "schedule_id": 10,
            "name": "CP - James Bond",
            "schedule_type": "Individual Schedule",
            "number_of_shifts": 10,
            "start_date": "2022-04-11 07:00:00",
            "end_date": "2022-05-11 09:00:00",
            "shifts": [
               "2022-04-11 07:00:00",
               "2022-04-13 07:00:00",
               "2022-04-18 07:00:00",
               "2022-04-20 07:00:00",
               "2022-04-25 07:00:00",
               "2022-04-27 07:00:00",
               "2022-05-02 07:00:00",
               "2022-05-04 07:00:00",
               "2022-05-09 07:00:00",
               "2022-05-11 07:00:00"
            ]
         },
         {
            "schedule_id": 11,
            "name": "James_Miller_App_Test",
            "schedule_type": "Individual Schedule",
            "number_of_shifts": 30,
            "start_date": "2022-04-21 07:00:00",
            "end_date": "2022-05-20 15:00:00",
            "shifts": [
               "2022-04-30 07:00:00",
               "2022-05-01 07:00:00",
               "2022-05-02 07:00:00",
               "2022-05-03 07:00:00",
               "2022-05-04 07:00:00",
               "2022-05-05 07:00:00",
               "2022-05-06 07:00:00",
               "2022-05-07 07:00:00",
               "2022-05-08 07:00:00",
               "2022-05-09 07:00:00",
               "2022-05-10 07:00:00",
               "2022-05-11 07:00:00",
               "2022-05-12 07:00:00",
               "2022-05-13 07:00:00",
               "2022-05-14 07:00:00",
               "2022-05-15 07:00:00",
               "2022-05-16 07:00:00",
               "2022-05-17 07:00:00",
               "2022-05-18 07:00:00",
               "2022-05-19 07:00:00",
               "2022-05-20 07:00:00"
            ]
         },
      ]
   }
]

This is my expected result after filtering. Note that only the participant that has shifts in the current month is returned AND the allschedules object only has items that have atleast one date that is in the current month.

"where the dates inside the shifts array is for the current month.": this is open for interpretation: do you want the participants for which all schedules have at least one date which is in the current month, or participants for which at least one schedule has all of its dates in the current month, or any other permutation of any versus all? Or do you want the shifts to be filtered for the current month, and if that results in at least one shift, then that schedule should remain, and if such schedules remain for a participant, that participant should be retained? — trincot
– trincot, Commented May 2, 2022 at 9:28
Hello @trincot. The objective is to have the array be filtered to return only participants that have a shift/shifts that is/are in the current month. Hope that makes sense — suo
– suo, Commented May 2, 2022 at 9:34
"...participants that have a shift/shifts that is/are in the current month": For all their schedules, or for at least one of their schedules? — trincot
– trincot, Commented May 2, 2022 at 9:37
So the result should be an empty array now (as we are in month 5). Can you confirm? — trincot
– trincot, Commented May 2, 2022 at 9:45

trincot · Accepted Answer · 2022-05-02 10:31:33Z

It appears that you not only want to filter the participants array, but also want for each retained participant that its allschedules array is filtered too.

So, then you would better return a new object structure to avoid that the input structure is mutated.

Also, checking only the month part of a date may not give good results when the schedules span more than one year. It will be better to check that also the year matches:

Here is how it could be done:

let participants = [{"participant_id": 2,"name": "Bond James","allschedules": [{"schedule_id": 1,"name": "James_Bond_SIL_January_22 (AM) - 07:00 - 15:00","schedule_type": "Individual Schedule","number_of_shifts": 31,"start_date": "2022-01-01 07:00:00","end_date": "2022-01-31 15:00:00","shifts": ["2022-01-01 07:00:00","2022-01-02 07:00:00","2022-01-03 07:00:00","2022-01-04 07:00:00"]},{"schedule_id": 2,"name": "Bonds-1:2 Schedule","schedule_type": "Individual Schedule","number_of_shifts": 5,"start_date": "2022-01-12 07:00:00","end_date": "2022-01-16 11:00:00","shifts": ["2022-01-12 07:00:00","2022-01-13 07:00:00","2022-01-14 07:00:00","2022-01-15 07:00:00","2022-01-16 07:00:00"]},{"schedule_id": 9,"name": "test april","schedule_type": "Individual Schedule","number_of_shifts": 4,"start_date": "2022-04-09 16:00:00","end_date": "2022-04-12 20:00:00","shifts": ["2022-04-09 16:00:00","2022-04-10 16:00:00","2022-04-11 16:00:00","2022-04-12 16:00:00"]},{"schedule_id": 10,"name": "CP - James Bond","schedule_type": "Individual Schedule","number_of_shifts": 10,"start_date": "2022-04-11 07:00:00","end_date": "2022-05-11 09:00:00","shifts": ["2022-04-11 07:00:00","2022-04-13 07:00:00","2022-04-18 07:00:00","2022-04-20 07:00:00","2022-04-25 07:00:00","2022-04-27 07:00:00","2022-05-02 07:00:00","2022-05-04 07:00:00","2022-05-09 07:00:00","2022-05-11 07:00:00"]},{"schedule_id": 11,"name": "James_Miller_App_Test","schedule_type": "Individual Schedule","number_of_shifts": 30,"start_date": "2022-04-21 07:00:00","end_date": "2022-05-20 15:00:00","shifts": ["2022-04-30 07:00:00","2022-05-01 07:00:00","2022-05-02 07:00:00","2022-05-03 07:00:00","2022-05-04 07:00:00","2022-05-05 07:00:00","2022-05-06 07:00:00","2022-05-07 07:00:00","2022-05-08 07:00:00","2022-05-09 07:00:00","2022-05-10 07:00:00","2022-05-11 07:00:00","2022-05-12 07:00:00","2022-05-13 07:00:00","2022-05-14 07:00:00","2022-05-15 07:00:00","2022-05-16 07:00:00","2022-05-17 07:00:00","2022-05-18 07:00:00","2022-05-19 07:00:00","2022-05-20 07:00:00"]},{"schedule_id": 12,"name": "Grouped Schedule for April 2022","schedule_type": "Shared/Grouped Schedule","number_of_shifts": 3,"start_date": "2022-04-28 12:00:00","end_date": "2022-04-30 18:00:00","shifts": ["2022-04-28 12:00:00","2022-04-29 12:00:00","2022-04-30 12:00:00"]}]},{"participant_id": 3,"name": "Barkley Charles","allschedules": [{"schedule_id": 12,"name": "Grouped Schedule for April 2022","schedule_type": "Shared/Grouped Schedule","number_of_shifts": 3,"start_date": "2022-04-28 12:00:00","end_date": "2022-04-30 18:00:00","shifts": ["2022-04-28 12:00:00","2022-04-29 12:00:00","2022-04-30 12:00:00"]}]}];

const currentMonth = new Date().toLocaleDateString("en-SE").slice(0, 7); // YYYY-MM format
const result = participants.map(participant => ({
    ...participant,
    allschedules: participant.allschedules.filter(({shifts}) => 
        shifts.some(shift => shift.startsWith(currentMonth))
    )
})).filter(({allschedules: {length}}) => length);

console.log(result);

NB: I didn't use momentjs as even the authors discourage its use in new projects. Moreover, it is very easy to make the month comparison with native JavaScript.

Nick Vu · Accepted Answer · 2022-05-02 10:25:39Z

shifts actually are the data pieces of start_date and end_date, so you just need to check start_date month is within the current month or not instead of checking all shifts. If it is, we just need to add it to the result

Moment.js version

//const currentMonth = moment().format("M") //get the actual today 
const currentMonth = moment("2022-05-01 12:00:00").format("M")

const result = participants.map((participant) => ({
  ...participant,
  allschedules: participant.allschedules.filter(schedule => moment(schedule.start_date).format("M") === currentMonth || moment(schedule.end_date).format("M") === currentMonth)
})).filter((participant) => participant.allschedules && participant.allschedules.length)

console.log(result)

let participants = [{
"participant_id": 2,
"name": "Bond James",
"allschedules": [{
    "schedule_id": 1,
    "name": "James_Bond_SIL_January_22 (AM) - 07:00 - 15:00",
    "schedule_type": "Individual Schedule",
    "number_of_shifts": 31,
    "start_date": "2022-01-01 07:00:00",
    "end_date": "2022-01-31 15:00:00",
    "shifts": [
      "2022-01-01 07:00:00",
      "2022-01-02 07:00:00",
      "2022-01-03 07:00:00",
      "2022-01-04 07:00:00"
    ]
  },
  {
    "schedule_id": 2,
    "name": "Bonds-1:2 Schedule",
    "schedule_type": "Individual Schedule",
    "number_of_shifts": 5,
    "start_date": "2022-01-12 07:00:00",
    "end_date": "2022-01-16 11:00:00",
    "shifts": [
      "2022-01-12 07:00:00",
      "2022-01-13 07:00:00",
      "2022-01-14 07:00:00",
      "2022-01-15 07:00:00",
      "2022-01-16 07:00:00"
    ]
  },
  {
    "schedule_id": 9,
    "name": "test april",
    "schedule_type": "Individual Schedule",
    "number_of_shifts": 4,
    "start_date": "2022-04-09 16:00:00",
    "end_date": "2022-04-12 20:00:00",
    "shifts": [
      "2022-04-09 16:00:00",
      "2022-04-10 16:00:00",
      "2022-04-11 16:00:00",
      "2022-04-12 16:00:00"
    ]
  },
  {
    "schedule_id": 10,
    "name": "CP - James Bond",
    "schedule_type": "Individual Schedule",
    "number_of_shifts": 10,
    "start_date": "2022-04-11 07:00:00",
    "end_date": "2022-05-11 09:00:00",
    "shifts": [
      "2022-04-11 07:00:00",
      "2022-04-13 07:00:00",
      "2022-04-18 07:00:00",
      "2022-04-20 07:00:00",
      "2022-04-25 07:00:00",
      "2022-04-27 07:00:00",
      "2022-05-02 07:00:00",
      "2022-05-04 07:00:00",
      "2022-05-09 07:00:00",
      "2022-05-11 07:00:00"
    ]
  },
  {
    "schedule_id": 11,
    "name": "James_Miller_App_Test",
    "schedule_type": "Individual Schedule",
    "number_of_shifts": 30,
    "start_date": "2022-04-21 07:00:00",
    "end_date": "2022-05-20 15:00:00",
    "shifts": [
      "2022-04-30 07:00:00",
      "2022-05-01 07:00:00",
      "2022-05-02 07:00:00",
      "2022-05-03 07:00:00",
      "2022-05-04 07:00:00",
      "2022-05-05 07:00:00",
      "2022-05-06 07:00:00",
      "2022-05-07 07:00:00",
      "2022-05-08 07:00:00",
      "2022-05-09 07:00:00",
      "2022-05-10 07:00:00",
      "2022-05-11 07:00:00",
      "2022-05-12 07:00:00",
      "2022-05-13 07:00:00",
      "2022-05-14 07:00:00",
      "2022-05-15 07:00:00",
      "2022-05-16 07:00:00",
      "2022-05-17 07:00:00",
      "2022-05-18 07:00:00",
      "2022-05-19 07:00:00",
      "2022-05-20 07:00:00"
    ]
  },
  {
    "schedule_id": 12,
    "name": "Grouped Schedule for April 2022",
    "schedule_type": "Shared/Grouped Schedule",
    "number_of_shifts": 3,
    "start_date": "2022-04-28 12:00:00",
    "end_date": "2022-04-30 18:00:00",
    "shifts": [
      "2022-04-28 12:00:00",
      "2022-04-29 12:00:00",
      "2022-04-30 12:00:00"
    ]
  }
]
  },
  {
"participant_id": 3,
"name": "Barkley Charles",
"allschedules": [{
  "schedule_id": 12,
  "name": "Grouped Schedule for April 2022",
  "schedule_type": "Shared/Grouped Schedule",
  "number_of_shifts": 3,
  "start_date": "2022-04-28 12:00:00",
  "end_date": "2022-04-30 18:00:00",
  "shifts": [
    "2022-04-28 12:00:00",
    "2022-04-29 12:00:00",
    "2022-04-30 12:00:00"
  ]
}]
  }
]

//simulate today is 1st May 2022
//const currentMonth = moment().format("M") //get the actual today 
const currentMonth = moment("2022-05-01 12:00:00").format("M")

const result = participants.map((participant) => ({
  ...participant,
  allschedules: participant.allschedules.filter(schedule => moment(schedule.start_date).format("M") === currentMonth || moment(schedule.end_date).format("M") === currentMonth)
})).filter((participant) => participant.allschedules && participant.allschedules.length)

console.log(result)

.as-console-wrapper { max-height: 100% !important; top: 0; }

<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.29.1/moment.min.js"></script>

Javascript version (it's more preferable because it's lighter than moment that would save user traffic to load your scripts)

//simulate today is May 1st 2022
//const currentMonth = new Date().format("M") //get the actual today 
const currentMonth = new Date("2022-05-01 12:00:00").getMonth()

const result = participants.map((participant) => ({
  ...participant,
  allschedules: participant.allschedules.filter(schedule => new Date(schedule.start_date).getMonth() === currentMonth || new Date(schedule.end_date).getMonth() === currentMonth)
})).filter((participant) => participant.allschedules && participant.allschedules.length)

console.log(result)

let participants = [{
    "participant_id": 2,
    "name": "Bond James",
    "allschedules": [{
        "schedule_id": 1,
        "name": "James_Bond_SIL_January_22 (AM) - 07:00 - 15:00",
        "schedule_type": "Individual Schedule",
        "number_of_shifts": 31,
        "start_date": "2022-01-01 07:00:00",
        "end_date": "2022-01-31 15:00:00",
        "shifts": [
          "2022-01-01 07:00:00",
          "2022-01-02 07:00:00",
          "2022-01-03 07:00:00",
          "2022-01-04 07:00:00"
        ]
      },
      {
        "schedule_id": 2,
        "name": "Bonds-1:2 Schedule",
        "schedule_type": "Individual Schedule",
        "number_of_shifts": 5,
        "start_date": "2022-01-12 07:00:00",
        "end_date": "2022-01-16 11:00:00",
        "shifts": [
          "2022-01-12 07:00:00",
          "2022-01-13 07:00:00",
          "2022-01-14 07:00:00",
          "2022-01-15 07:00:00",
          "2022-01-16 07:00:00"
        ]
      },
      {
        "schedule_id": 9,
        "name": "test april",
        "schedule_type": "Individual Schedule",
        "number_of_shifts": 4,
        "start_date": "2022-04-09 16:00:00",
        "end_date": "2022-04-12 20:00:00",
        "shifts": [
          "2022-04-09 16:00:00",
          "2022-04-10 16:00:00",
          "2022-04-11 16:00:00",
          "2022-04-12 16:00:00"
        ]
      },
      {
        "schedule_id": 10,
        "name": "CP - James Bond",
        "schedule_type": "Individual Schedule",
        "number_of_shifts": 10,
        "start_date": "2022-04-11 07:00:00",
        "end_date": "2022-05-11 09:00:00",
        "shifts": [
          "2022-04-11 07:00:00",
          "2022-04-13 07:00:00",
          "2022-04-18 07:00:00",
          "2022-04-20 07:00:00",
          "2022-04-25 07:00:00",
          "2022-04-27 07:00:00",
          "2022-05-02 07:00:00",
          "2022-05-04 07:00:00",
          "2022-05-09 07:00:00",
          "2022-05-11 07:00:00"
        ]
      },
      {
        "schedule_id": 11,
        "name": "James_Miller_App_Test",
        "schedule_type": "Individual Schedule",
        "number_of_shifts": 30,
        "start_date": "2022-04-21 07:00:00",
        "end_date": "2022-05-20 15:00:00",
        "shifts": [
          "2022-04-30 07:00:00",
          "2022-05-01 07:00:00",
          "2022-05-02 07:00:00",
          "2022-05-03 07:00:00",
          "2022-05-04 07:00:00",
          "2022-05-05 07:00:00",
          "2022-05-06 07:00:00",
          "2022-05-07 07:00:00",
          "2022-05-08 07:00:00",
          "2022-05-09 07:00:00",
          "2022-05-10 07:00:00",
          "2022-05-11 07:00:00",
          "2022-05-12 07:00:00",
          "2022-05-13 07:00:00",
          "2022-05-14 07:00:00",
          "2022-05-15 07:00:00",
          "2022-05-16 07:00:00",
          "2022-05-17 07:00:00",
          "2022-05-18 07:00:00",
          "2022-05-19 07:00:00",
          "2022-05-20 07:00:00"
        ]
      },
      {
        "schedule_id": 12,
        "name": "Grouped Schedule for April 2022",
        "schedule_type": "Shared/Grouped Schedule",
        "number_of_shifts": 3,
        "start_date": "2022-04-28 12:00:00",
        "end_date": "2022-04-30 18:00:00",
        "shifts": [
          "2022-04-28 12:00:00",
          "2022-04-29 12:00:00",
          "2022-04-30 12:00:00"
        ]
      }
    ]
  },
  {
    "participant_id": 3,
    "name": "Barkley Charles",
    "allschedules": [{
      "schedule_id": 12,
      "name": "Grouped Schedule for April 2022",
      "schedule_type": "Shared/Grouped Schedule",
      "number_of_shifts": 3,
      "start_date": "2022-04-28 12:00:00",
      "end_date": "2022-04-30 18:00:00",
      "shifts": [
        "2022-04-28 12:00:00",
        "2022-04-29 12:00:00",
        "2022-04-30 12:00:00"
      ]
    }]
  }
]

//simulate today is May 1st 2022
//const currentMonth = new Date().format("M") //get the actual today 
const currentMonth = new Date("2022-05-01 12:00:00").getMonth()

const result = participants.map((participant) => ({
  ...participant,
  allschedules: participant.allschedules.filter(schedule => new Date(schedule.start_date).getMonth() === currentMonth || new Date(schedule.end_date).getMonth() === currentMonth)
})).filter((participant) => participant.allschedules && participant.allschedules.length)

console.log(result)

.as-console-wrapper { max-height: 100% !important; top: 0; }

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