How to add value of second object to first object?

Question

I'm learning JavaScript on my own and am going through tutorials and cannot understand how to add the value of the second object to the first object. I tried to look at this How can I add a key/value pair to a JavaScript object? but I couldn't follow it. Below is the code I wrote:

 var person1 = {
      name: 'Joe',
  role: 'specialist'
};
var person2 = {
  name: 'Mr. Roberts',
  role: 'supervisor'
};

function addObjectProperty(obj1, key, obj2) {
  addObjectProperty(person1, 'manager', person2);

  return (person1.manager = (person2.name + person2.role));
}

console.log(person1.manager);

My result returns:

undefined

But it should return:

//  --> { name: 'Mr. Roberts', role: 'supervisor' }

Could someone kindly advise me further? Thank you! :)

The call to `addObjectProperty()` needs to be **outside** the function, not inside. — Pointy, Feb 23 '17 at 21:50
@Pointy When I do your suggestion I get: **Mr. Roberts, supervisor** and not **{ name: 'Mr. Roberts', role: 'supervisor' }** . How would I fix this? I tried adding **obj1[key] = obj2** but it didn't change anything. Or would the way Ibrahim wrote the code below be the best way to go? Thank you so much! — learninghowtocode, Feb 23 '17 at 22:28

score 1 · Accepted Answer · answered Feb 23 '17 at 21:53

var person1 = {
  name: 'Joe',
  role: 'specialist'
};
var person2 = {
  name: 'Mr. Roberts',
  role: 'supervisor'
};

function addObjectProperty(obj1, key, obj2) {
  obj1[key] = obj2; // using bracket notaion to add obj2 as a property of obj1 under the key key
}

// call the function outside its definition or it'll cause an infinite recursion
addObjectProperty(person1, 'manager', person2); // person1.manager = person2

console.log(person1);

How to add value of second object to first object?

1 Answers1