const hours = [5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24];

    const data = [
        {
            _id: '6239f41e0a9e6ba82ebc9774',
            title: 'X',
            capacity: 60,
            inParkings: [
                {
                    hour: 7,
                    count: 5,
                },
                {
                    hour: 19,
                    count: 4,
                },
                {
                    hour: 16,
                    count: 1,
                },
                {
                    hour: 8,
                    count: 11,
                },
                {
                    hour: 5,
                    count: 4,
                },
                {
                    hour: 9,
                    count: 3,
                },
                {
                    hour: 13,
                    count: 12,
                },
                {
                    hour: 14,
                    count: 6,
                },
                {
                    hour: 10,
                    count: 9,
                },
                {
                    hour: 23,
                    count: 1,
                },
                {
                    hour: 6,
                    count: 1,
                },
                {
                    hour: 12,
                    count: 8,
                },
                {
                    hour: 11,
                    count: 3,
                },
            ],
        },
        {
            _id: '62725362d9575e262f51ed84',
            title: 'Y',
            capacity: 75,
            inParkings: [
                {
                    hour: 13,
                    count: 6,
                },
                {
                    hour: 5,
                    count: 1,
                },
                {
                    hour: 14,
                    count: 2,
                },
                {
                    hour: 1,
                    count: 1,
                },
                {
                    hour: 6,
                    count: 1,
                },
            ],
        },
    ];

If the hour values ​​in the parkings data are missing from the data in the hours array, I want to add extra for the values ​​that are not

so for example, count 0 needs to be entered for hours that are not as follows

the code i wrote

data.map((m) => {
            return {
                name: m.title,
                data: m.inParkings.slice().sort((a, b) => {
                    return a.hour - b.hour;
                }),
            };
        })

I want to get a similar output

[{
  data: [{
  count: 4,
  hour: 5
}, {
  count: 1,
  hour: 6
}, {
  count: 5,
  hour: 7
}, {
  count: 11,
  hour: 8
}, {
  count: 3,
  hour: 9
}, {
  count: 9,
  hour: 10
}, {
  count: 3,
  hour: 11
}, {
  count: 8,
  hour: 12
}, {
  count: 12,
  hour: 13
}, {
  count: 6,
  hour: 14
}, {
  count: 1,
  hour: 16
}, {
  count: 4,
  hour: 19
}, {
  count: 1,
  hour: 23
}],
  name: "X"
}, {
  data: [{
  count: 1,
  hour: 1
}, {
  count: 1,
  hour: 5
}, {
  count: 1,
  hour: 6
}, {
  count: 6,
  hour: 13
}, {
  count: 2,
  hour: 14
}, {
  count: 0,
  hour: 18,
}],
  name: "Y"
}]

For example, since there is no 18 value in the hours array in parkings, I need to enter the value of the relevant hour as 0 in the array I just created.

I may have explained it a bit confused, but briefly, if there is no clock in the hours array in the parking data, I need to add the relevant time to the data and return count 0.

CodePudding user response：

You could collect the counts in an object and map hours with count or zero.

const
    hours = [5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24],
    data = [{ _id: '6239f41e0a9e6ba82ebc9774', title: 'X', capacity: 60, inParkings: [{ hour: 7, count: 5 }, { hour: 19, count: 4 }, { hour: 16, count: 1 }, { hour: 8, count: 11 }, { hour: 5, count: 4 }, { hour: 9, count: 3 }, { hour: 13, count: 12 }, { hour: 14, count: 6 }, { hour: 10, count: 9 }, { hour: 23, count: 1 }, { hour: 6, count: 1 }, { hour: 12, count: 8 }, { hour: 11, count: 3 }], }, { _id: '62725362d9575e262f51ed84', title: 'Y', capacity: 75, inParkings: [{ hour: 13, count: 6 }, { hour: 5, count: 1 }, { hour: 14, count: 2 }, { hour: 1, count: 1 }, { hour: 6, count: 1 }] }],
    getData = parkings => {
        const
            counts = Object
                .fromEntries(parkings.map(({ hour, count }) => [hour, count]));

        return hours.map(hour => ({ hour, count: counts[hour] || 0 }));
    },
    result = data.map(({ title: name, inParkings }) => ({ data: getData(inParkings), name }));

console.log(result);

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