khg0712

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

khg0712

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

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 Animal(name, age, species) {
  this.name = name;
  this.age = age;
  this.species = species;
}

var frog = new Animal('froll', 2, 'frog');
console.log(frog.hasOwnProperty('name'));//true 출력
console.log(frog.hasOwnProperty('fatherName'));//false 출력
console.dir(Animal.prototype);//Animal.prototype 객체

khg0712

"hello".toUpperCase();//new String(myWord).toUpperCase();

khg0712

var myWord = "hello";
myWord.someProperty = 111; // new String(myWord).someProperty = 111;

khg0712

1.toString();//error

khg0712

Number.prototype.prop = 1;
var a = 1;
console.log(a.prop);//1 출력

khg0712

function Animal (name) {
  this.word = function() {
      console.log("abcd");
  };
  this.name = name;
}

var dog = new Animal("James");
dog.word();//abcd 출력

khg0712

function Animal(species) {
  this.species = species;
}

var frog = new Animal('frog');
frog.getSpecies();//Error

Animal.prototype.getSpecies = function() {
  console.log(this.species);
};