How to convert an object with arrays as values to an array of objects

Question

I have an object that is in this form:

{
 Health_id: [1, 2, 3],
 Epoch_Time: [16012,16013,16014],
 Disk_Free: ['86.2', '86.2','86.2'],
 Memory_Free: ['1555', '1552','1565'],
 CPU_Usage_Percent: ['6.7', '3.0', '2.7'],
 CPU_Time: ['24744.89','24749.60','24753.81']
}

I need to covert this into an array of objects like this:

[
 {'Health_id':1,'Epoch_Time':'16012','Disk_Free':'86.2','Memory_Free':'1555','CPU_Usage_Percent':'6.7','CPU_Time':'24744.89'}, 
 {'Health_id':2,'Epoch_Time':'16013','Disk_Free':'86.2','Memory_Free':'1552','CPU_Usage_Percent''3.0','CPU_Time':'24749.60'}, 
 {'Health_id':3,'Epoch_Time':'16014','Disk_Free':'86.2','Memory_Free':'1565','CPU_Usage_Percent': '2.7','CPU_Time':'24753.81'},
]

Answer 1

I am hoping that all the inner arrays have the same number of elements. You can try this way-

const data = {
 Health_id: [1, 2, 3],
 Epoch_Time: [16012,16013,16014],
 Disk_Free: ['86.2', '86.2','86.2'],
 Memory_Free: ['1555', '1552','1565'],
 CPU_Usage_Percent: ['6.7', '3.0', '2.7'],
 CPU_Time: ['24744.89','24749.60','24753.81']
};
const res = [];
const keys = Object.keys(data);
for(let i = 0, l = data.Health_id.length; i < l; i++) {
 const obj = {};
 keys.forEach(key => obj[key] = data[key][i]);
 res.push(obj);
}
console.log(res);

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Answer 2

Simple naive solution for your reference

const convert = (old) => {
 const nRecords = old.Health_id.length;
 const nData = [];
 for (let index = 0; index < nRecords; index++) {
 nData.push({
 Health_id: old.Health_id[index],
 Epoch_Time: old.Epoch_Time[index],
 Disk_Free: old.Disk_Free[index],
 Memory_Free: old.Memory_Free[index],
 CPU_Usage_Percent: old.CPU_Usage_Percent[index],
 CPU_Time: old.CPU_Time[index],
 });
 }
 return nData;
};
let data = {
 Health_id: [1, 2, 3],
 Epoch_Time: [16012, 16013, 16014],
 Disk_Free: ["86.2", "86.2", "86.2"],
 Memory_Free: ["1555", "1552", "1565"],
 CPU_Usage_Percent: ["6.7", "3.0", "2.7"],
 CPU_Time: ["24744.89", "24749.60", "24753.81"],
};
data = convert(data);
console.log(data);

Answer 3

With a simple for loop and the array.reduce() method you can just create the new objects.

const data = {
 Health_id: [1, 2, 3],
 Epoch_Time: [16012,16013,16014],
 Disk_Free: ['86.2', '86.2','86.2'],
 Memory_Free: ['1555', '1552','1565'],
 CPU_Usage_Percent: ['6.7', '3.0', '2.7'],
 CPU_Time: ['24744.89','24749.60','24753.81']
};
const size = Object.values(data)[0].length;
const keys = Object.keys(data);
const result = [];
for(let i = 0; i < size; i++) {
 const options = keys.reduce((acc, key) => {
 acc[key] = data[key][i];
 return acc;
 }, {})
 
 result.push(options);
}
console.log(result);

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