섹션 2 Javascript Fundamentals part 2 - Object Methods

///////////////////////////////////////
// Object Methods

const jonas = {
  firstName: 'Jonas',
  lastName: 'Schmedtmann',
  birthYeah: 1991,
  job: 'teacher',
  friends: ['Michael', 'Peter', 'Steven'],
  hasDriversLicense: true,

  // calcAge: function (birthYeah) {
  //   return 2037 - birthYeah;
  // }

  // calcAge: function () {
  //   // console.log(this);
  //   return 2037 - this.birthYeah;
  // }

  calcAge: function () {
    this.age = 2037 - this.birthYeah;
    return this.age;
  },

  getSummary: function () {
    return `${this.firstName} is a ${this.calcAge()}-year old ${jonas.job}, and he has ${this.hasDriversLicense ? 'a' : 'no'} driver's license.`
  }
};

console.log(jonas.calcAge());

console.log(jonas.age);
console.log(jonas.age);

 

object 이름 대신 this를 쓴다. function도 이용 가능