khg0712

var objectEx = {
  prop1: 'k',
  prop2: 1,
  prop3: 'Hello'
};

console.log(objectEx.hasOwnProperty('prop1'));//true 출력
console.log(objectEx.hasOwnProperty('prop4'));//false 출력
console.dir(objectEx);

khg0712

function myAdd(){
  console.dir(arguments);
  Array.prototype.shift.apply(arguments);
  console.dir(arguments);
}
myAdd(1,2,3,4);

khg0712

function animal(name){
  this.name = name;
}
var dog = {};
animal.apply(dog,['James']);//animal.call(dog,'James'); 와 같다.
console.dir(dog);

khg0712

var a = 10;//전역 변수 a 생성
var object = {
  a: 1,
  func1: function() {
    var that = this;//that 변수에 this 저장
    this.a += 1;
    console.log('func1: ' + this.a);
    var func2 = function () {
      that.a += 1;
      console.log('func2: ' + that.a);

khg0712

var a = 10;//전역 변수 a 생성
var object = {
  a: 1,
  func1: function() {
    this.a += 1;
    console.log('func1: ' + this.a);
    var func2 = function () {
      this.a += 1;
      console.log('func2: ' + this.a);
      var func3 = function () {

khg0712

var my = {
  name: 'my',
  sayName() {
    console.log(this.name);
  }
};

var other = {
  name: 'other'
};

khg0712

function average() {
  var sum = 0;
  for(var i = 0; i<arguments.length; i++) {
      sum += arguments[i];
  }
  return sum/arguments.length;
}

average(1,2,3,4,5);//3 반환

khg0712

function average(arg1, arg2, arg3) {
  return (arg1 + arg2 + arg3)/3;
}

average(1);//NaN
average(1,2);//NaN
average(1,2,3);//2

khg0712

function person (name){
this.name = name;
}

console.dir(person.prototype);
console.dir(person.prototype.constructor);

khg0712

var add = function(a,b) {
  return a + b;
};

add.k = 0;
console.log(add.k);//0 출력