Js change object inside array in for each loop

Question

I want to change the current object in for each loop and it does not work, Why it is not working and how can i do this?

var arr = [{num: 1}, {num: 2}];

arr.         


        

Answer 1

You are changing the local reference item in the callback function.

To change array contents, you need to use the array index and assign new reference to it, as shown in below

arr.forEach(function(item, i) {
  arr[i] = {somethingElse: 1} //using index, change the reference in array
});