prototype practice.js

function Health(name,lastname){
    this.name = name;
    this.lastname = lastname;
}

var a = Health("chanwoo","park"); //return값이 없기때문에 a는 언디파인드, 윈도우에 네임 변수를 생성했기때문에 'chanwoo'출력
console.log(name);


var allFuntions = {
    addtask:function(task){
        this.todolist.push(task);
    },
    completedTask:function(task){
        var index = this.todolist.indexOf(task);

        this.completed.push(task);
        this.todolist.splice(index,1);
    },
    showList:function(){
        console.log(this.todolist);
    }
};
function Mytask(){
    this.todolist = [];
    this.completed = [];
}

Mytask.prototype = allFuntions;

var firstTodolist = new Mytask();
firstTodolist.addtask("공부하기");
firstTodolist.addtask("idkidk")l

 firstTodolist.completedTask("공부하기");
 firstTodolist.showList();

 var secondTodolist = new Mytask();
 secondTodolist.addtask("크롱한테 사탕받기");
 secondTodolist.showList();