자바스크립트 array, 객체, 함수

• array
  • 선언  const numbers = [1,2,3,4,5] 
  • 삽입  numbers.push(6)
• 객체
  • 선언  const player = { name : "sowon", points : 10, power : false, };
  • 호출  
    • player.name
    • player["name"]
  • 추가  player.lastName = "choi"

const player = {
  name : "sowon",
  points : 10,
  power : false,
  sayHello: function(otherPersonName){
    console.log("hello "+otherPersonName);
  }
};

player.lastName = "choi"
player.sayHello("hong");

• 형변환 
  • parseInt
    • Nan : not a number
      • isNan 함수