Merge a simple array of values into an array of json by adding a key

Good morning,
I’m struggling with a small problem, and I don’t find an answer for my case :

I have an array of value : let’s say

let tab = [1,2,3]

Then I have an array of json :

let values = [
  {key1 : "a", key2 : "b", key3: "c"}, 
  {key1 : "d", key2 : "e", key3: "f"},
  {key1 : "g", key2 : "h", key3: "i"}
]

I would like to map the value of the array in the json to have :

[{key1 : "a", key2 : "b", key3: "c", index: 1}, 
{key1 : "d", key2 : "e", key3: "f", index: 2},
{key1 : "g", key2 : "h", key3: "i", index: 3}]

Is there an easy to do that ?

>Solution :

Assuming you meant "array of objects" and not "array of json", you can indeed do it with map this way:

const tab = [1,2,3]

const myArray = [
{key1: 'a', key2: 'b', key3:'c'}, 
{key1:'d', key2 : 'e', key3:'f'},
{key1 : 'g', key2 : 'h', key3:'i'}];

console.log(myArray.map((element, index) => { return {...element, index:tab[index]}; }));