Convert array to object using values like keys - arrays

Question

I have a project in Typescript in which I am trying to create a function that converts an array into an object using the first values as keys of the object.
This is my array:
let testArr = ["id", "ser", "add", "1", "asd", "82.255", "2", "ert", "82.119", "3", "pol", "82.250"];
This is what I need:
let newArr = [
{
"id": "1",
"ser": "asd",
"add": "82.255"
},
{
"id": "2",
"ser": "ert",
"add": "82.119"
},
{
"id": "3",
"ser": "pol",
"add": "82.250"
}
]
In result I store the data of the array that I want to use as keys of the object:
let chunk = 3;
let result = testArr.reduce((resultArray, item, index) => {
const chunkIndex = Math.floor(index/chunk)
if(!resultArray[chunkIndex]) {
resultArray[chunkIndex] = [] // start a new chunk
}
resultArray[chunkIndex].push(item)
return resultArray
}, [])
My problem is that I don't know how to use that data as keys of the object and I would like to know how to convert the result variable into a generic function for any array and any number.

Answer 1

You can iterate over the testArr array using forEach and check the index. if it's a multiple of 3 you can assign an object with the values and push that object to the new array.
For your case, i've modified the answer to a generic case where you can pass the starting index of the values in the original array
let testArr = ["id", "ser", "add", "1", "asd", "82.255", "2", "ert", "82.119", "3", "pol", "82.250"];
const arr = [];
function genericArrayFormatter(checkIdx){
testArr.forEach((val, idx) => {
if (idx > checkIdx - 1 && idx % checkIdx === 0){
const obj = {};
let i = 0;
let index = idx;
while (checkIdx > i){
obj[testArr[i++]] = testArr[index++];
}
arr.push(obj);
}
});
}
genericArrayFormatter(3);
console.log(arr);