Javascript map function :add new key and value to object [duplicate]

Question

I have JSON array like this

var array= [{id:1,name:'foo'},{id:2,name:'bar'}]

I would like to add a new key (eg:isApproved) to each object in the existing array

expected output:

var array= [{id:1,name:'foo',isApproved:true},{id:2,name:'bar',isApproved:true}] 

I used the map function to achieve this

array.map(function(e,index){
     e.isApproved[index]= true
}

But this not worked for me

Answer 1

You were really close. You do not need the index here. The map passes through every element of the array, so 'e' will be each object in your array.

var array= [{id:1,name:'foo'},{id:2,name:'bar'}];

array.map(function(e){
     e.isApproved = true;
});
          
console.log(array);