Bracket Notation with Object.keys()

const obj = {
  "1" : {
    name : "bobby",
    age: 22,
    job : "programmer",
    company: "Apple"
  },
  "2" : {
    name : "joah",
    age: 25,
    job : "chef",
    company: "Banana"
  },
  "3" : {
    name : "Pam",
    age: 11,
    job : "doctor",
    company: "Cherry"
  }
}

Object.keys(obj).map(key=>{
  console.log("This is a key", key);
  console.log("This is gonna be a value",obj[key])
})

객체를 maping 하면 key만 순회할 수 있다.