Manipulating data from array of objects inside object to array of objects inside array

Question

I'm trying to manipulate data, and I'd need a solution for this

Tried mapping in different ways, but none of them worked.

This is the input data:

   data_input = {
    2000: [{
            _id: 0,
            name: "Jeff",
            value: 130,
            year: 2000
        },
        {
            _id: 1,
            name: "Bill",
            value: 30,
            year: 2000
        }
    ],
    2001: [{
            _id: 0,
            name: "Jeff",
            value: 20,
            year: 2001
        },
        {
            _id: 1,
            name: "Bill",
            value: 100,
            year: 2001
        }
    ]
 }

Here is the expected result:

   data_output = [{
        year: 2000,
        year_data: [{
                _id: 0,
                name: "Jeff",
                value: 130
            },
            {
                _id: 1,
                name: "Bill",
                value: 30
            }
        ]
    },
    {
        year: 2001,
        year_data: [{
                _id: 0,
                name: "Jeff",
                value: 20
            },
            {
                _id: 1,
                name: "Bill",
                value: 100
            }
        ]
    }
 ]

Code Maniac · Accepted Answer · 2019-05-14 11:40:16Z

4

You can use Object.entries and map

Here idea is :-

with object.entries get the key value from object and map on them to change it to needed format
Key is used as year property in desired structure and value is used as year_data

let data = {2000: [{ _id: 0, name: "Jeff", value:130, year: 2000 }, { _id: 1, name: "Bill", value:30, year: 2000 } ] , 2001 : [{ _id: 0, name: "Jeff", value: 20, year: 2001 }, {_id:1, name: "Bill", value: 100, year: 2001 } ]}

let final = Object.entries(data).map(([year, year_data]) => ({ year, year_data: year_data.map(({year,...rest})=>rest)}))

console.log(final)

edited May 14, 2019 at 11:40

answered May 14, 2019 at 11:31

Code Maniac

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Comments

Nina Scholz · Accepted Answer · 2019-05-14 11:33:24Z

0

You could map the values and destructure the year from the rest object.

var data_input = { 2000: [{ _id: 0, name: "Jeff", value: 130, year: 2000 }, { _id: 1, name: "Bill", value: 30, year: 2000 }], 2001: [{ _id: 0, name: "Jeff", value: 20, year: 2001 }, { _id: 1, name: "Bill", value: 100, year: 2001 }] },
    result = Object
        .values(data_input)
        .map(a => ({ year: a[0].year, year_data: a.map(({ year, ...rest }) => rest) }));

console.log(result);

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

answered May 14, 2019 at 11:33

Nina Scholz

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Comments

GansPotter · Accepted Answer · 2019-05-14 11:34:18Z

try this

 data_input = {
    2000: [{
            _id: 0,
            name: "Jeff",
            value: 130,
            year: 2000
        },
        {
            _id: 1,
            name: "Bill",
            value: 30,
            year: 2000
        }
    ],
    2001: [{
            _id: 0,
            name: "Jeff",
            value: 20,
            year: 2001
        },
        {
            _id: 1,
            name: "Bill",
            value: 100,
            year: 2001
        }
    ]
 }

var output = Object.keys(data_input).map(item => {
  let year_data = data_input[item].map(data => {
    delete data.year
    return data
  });
  return {
    year: item,
    year_data:year_data
  }
});

console.log(output);

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