Merge nested Array with same key javascript

Question

I have to organise the array, Getting a response array like this

let data = [
    {
        date: "2022-07-01T07:26:22",
        tips: [
            { id: 1 }
        ]
    },
    {
        date: "2022-07-01T12:05:55",
        tips: [
            { id: 1 }
        ]
    },
    {
        date: "2022-07-05T13:09:16",
        tips: [
            { id: 1 }
        ]
    },
    {
        date: "2022-07-05T13:31:07",
        tips: [
            { id: 1 }
        ]
    },
    {
        date: "2022-06-29T09:21:26",
        tips: [
            { id: 1 }
        ]
    }
]

The desired output :

let data = [
    {
        '2022-07-01': [
            {
                tips: [
                    { id: 1 }
                ]
            },
            {
                tips: [
                    { id: 1 }
                ]
            },
        ]
    },
    {
        '2022-07-05': [
            {
                tips: [
                    { id: 1 }
                ]
            },
            {
                tips: [
                    { id: 1 }
                ]
            },
        ]
    },
    {
        '2022-06-29': [
            {
                tips: [
                    { id: 1 }
                ]
            },
        ]
    }
]

I need to get data with the same key in the above array format. I have tried different ways to achieve this but have not gotten the proper result Which is the best way to get the desired output.

Thanks in advance!!!

you can solve this using reduce. but that end structure is weird. unless its absolutely necessary to get the output this way, you can further improve the output structure — cmgchess, Jul 06 '22 at 06:33
https://stackoverflow.com/questions/46802448/how-do-i-group-items-in-an-array-by-date — cmgchess, Jul 06 '22 at 06:35

cmgchess · Accepted Answer · 2022-07-06T07:09:27.087

Here is a solution using reduce. Grouping first using reduce and after that getting the values of the object using Object.values

let data = [    {        date: "2022-07-01T07:26:22",        tips: [            { id: 1 }        ]    },    {        date: "2022-07-01T12:05:55",        tips: [            { id: 1 }        ]    },    {        date: "2022-07-05T13:09:16",        tips: [            { id: 1 }        ]    },    {        date: "2022-07-05T13:31:07",        tips: [            { id: 1 }        ]    },    {        date: "2022-06-29T09:21:26",        tips: [            { id: 1 }        ]    }]

let res = Object.values(data.reduce((acc,{date,tips})=>{
  let key = date.substring(0,10)
  acc[key] = acc[key] || {[key]:[]}
  acc[key][key].push({tips})
  return acc
},{}))

console.log(res)

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Merge nested Array with same key javascript

1 Answers1