[Java Script]オブジェクト

const superman = {
  name : 'clark', // name: key, 'clark': value
  age : 33,
}

const superman = {
  name : 'clark', // name: key, 'clark': value
  age : 33,
}

// Object 접근
superman.name // 'clark'
superman['age'] // 33

// Object 추가
superman.gender = 'male';
superman['hairColor'] = 'black';

// Object 삭제
delete superman.hairColor;

const name = 'clark';
const age = 33;

const superman = {
  name, // == name : name;
  age, // == age : age;
  gender : 'male';
}

const superman = {
  name : 'clark',
  age : 33,
}

superman.birthDay; // undefined
'birthDay' in superman; // false
'age' in superman; // true

const superman = {
  name : 'clark',
  age : 33,
}

for(let key in superman){
  console.log(key)
  console.log(superman[key])
}

function makeObject(name = 'name', age = 20){
  return {
    name, // == name : name
    age, // == age : age
    hobby : 'football'
  }
}

const Mike = makeObject('Mike', 26);