03. Javascript Object Lesson

// var john = {
//   firstName: "John",
//   lastName: "Doe",
//   birthYear: 1990,
//   family: ["Jane", "Mike", "Emily"],
//   job: "teacher",
//   isMarried: false,
//   calcAge: function(){
//     // return 2020 - birthYear;
//     // return 2020 - this.birthYear
//     // this.age = 2020 - this.birthYear
//   }
// };

//  console.log(john)
// console.log(john.family[0])
// console.log(john["lastName"])
// console.log(john.calcAge(1990))
// console.log(john.calcAge())
// john.calcAge()
// console.log(john.age)
// john.job = 'designer'
// console.log(john)

// var jane = new Object();
// jane.name = 'Jane'
// jane.birthYear = 1992
// console.log(jane)

var User = function(name, job, birthYear) {
    this.name = name;
    this.job = job;
    this.birthYear = birthYear;
    // this.calcAge = function() {
    //   console.log(2020 - this.birthYear);
    // };
  };

  User.prototype.calcAge = function(){
    return 2020 - this.birthYear
  }

  // User("John", "teacher", 1990)

  var john = new User("John", "teacher", 1990);
  john.role = 'admin'
  console.log(john);

  var jane = new User("Jane", "designer", 1990);
  console.log(jane)