How to form This JSON from this Javascript array of arrays?

I’m asking this question again since I got downvotes due to unclear explanation in previous question:

I have this java script array of arrays

   arr1= [ 
       ['a', 'b'],
       ['1', '2']
       ]
           

And I need to form this JSON object

[
    {
        "label":"a",
        "value":"1"
    },
    {
        "label":"b",
        "value":"2"
    },
]
  

How do i do it?

>Solution :

Using Array#map:

const arr = [ ['a', 'b'], ['1', '2'] ];

const [labels, values] = arr;
const res = labels.map((label, index) => ({ label, value: values[index] }));

console.log(res);