gistfile1.txt

function NamedOne(first, last) {
  this.firstName = first;
  this.lastName = last;
};

NamedOne.prototype = {

  constructor: NamedOne,
  
  get fullName () {
    return this.firstName + ' ' + this.lastName;
  },

  set fullName (value) {
    var splittedString = value.split(' ');

    if (splittedString.length === 2) {
      this.firstName = splittedString[0];
      this.lastName = splittedString[1];
    }
  }

};

x = new NamedOne('John', 'Cat');
x.firstName; //John
x.fullName; //Juan Cat

x.firstName = 'Micaela'; //Micaela
x.fullName; //Micaela Cat

x.fullName = 'Amanda Dog';
x.firstName; // Amanda
x.lastName; // Dog