Como usar a destruição de objetos

// Noob [ not good ]
function getFullName(userObj) {
  const firstName = userObj.firstName;
  const lastName = userObj.lastName;

  return `${firstName} ${lastName}`;
}

// master [ yap little bit ]
function getFullName(userObj) {
  const { firstName, lastName } = userObj;
  return `${firstName} ${lastName}`;
}

// hacker [ i prefer this way ]
function getFullName({ firstName, lastName }) {
  return `${firstName} ${lastName}`;
}
// example func call
getFullName({
	firstName: 'John',
    lastName: 'Duo'
});
Easy Earthworm