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Transform data from a nested array to an object in JavaScript
Suppose, we have the following array of arrays −
const arr = [ [ ['dog', 'Harry'], ['age', 2] ], [ ['dog', 'Roger'], ['age', 5] ] ];
We are required to write a JavaScript function that takes in one such nested array. The function should then prepare an object based on the array.
The object for the above array should look like −
const output = [
{dog: 'Harry', age: 2},
{dog: 'Roger', age: 5}
];Example
The code for this will be −
const arr = [
[
['dog', 'Harry'], ['age', 2]
],
[
['dog', 'Roger'], ['age', 5]
]
];
const prepareObjectArray = (arr = []) => {
const copy = arr.slice();
copy.forEach((el, ind, array) => {
el.forEach((element, index, subArray) => {
subArray[element[0]] = element[1];
});
el.length = 0;
array[ind] = Object.assign({}, array[ind]);
});
return copy;
};
console.log(prepareObjectArray(arr));Output
And the output in the console will be −
[ { dog: 'Harry', age: 2 }, { dog: 'Roger', age: 5 } ]
Updated on: 24-Nov-2020
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