JavaScript(03):대상 지향

function createCar() {
    var temp = new Object;
    temp.color = "red";
    temp.brand = "Benz";
    temp.drive = function() {
        alert(this.brand + " is running...");
    }
    return temp;
}

var car = createCar();
car.drive();

function Car(brand, color) {
	if(this instanceof Car) {
		this.brand = brand;
		this.color = color;
		this.drive = function() {
			alert(this.brand + " is running...");
		};
	}
}

var car = new Car("Benz", "black");
car.drive();

function Car() {
}

Car.prototype.brand = "Benz";
Car.prototype.color = "black";
Car.prototype.drive = function() {
	alert(this.brand + " is running...");
}

var car = new Car();
car.drive();

function Person(name) {
	this.name = name;
	this.eat = function(place) {
		alert(this.name + " is eating at " + place);
	};
}

function Student(name, id) {
	this.newMethod = Person;
	this.newMethod(name);
	delete this.newMethod;

	this.id = id;
	this.study = function() {
		alert(this.name + " is studying...");
	};
}

var p1 = new Person("LUO Hao");
var p2 = new Student("LIAO Qiang", 1234);
p1.eat("Jinjiang Hotel");
p2.eat("1st Dinning Hall");
p2.study();

function Person(name) {
	this.name = name;
	this.eat = function(place) {
		alert(this.name + " is eating at " + place);
	};
}

function Student(name, id) {
	Person.call(this, name);

	this.id = id;
	this.study = function() {
		alert(this.name + " is studying...");
	};
}

var p1 = new Person("LUO Hao");
var p2 = new Student("LIAO Qiang", 1234);
p1.eat("Jinjiang Hotel");
p2.eat("1st Dinning Hall");
p2.study();

function Person(name) {
	this.name = name;
	this.eat = function(place) {
		alert(this.name + " is eating at " + place);
	};
}

function Student(name, id) {
	Person.apply(this, arguments); // 2nd parameter is an array

	this.id = id;
	this.study = function() {
		alert(this.name + " is studying...");
	};
}

var p1 = new Person("LUO Hao");
var p2 = new Student("LIAO Qiang", 1234);
p1.eat("Jinjiang Hotel");
p2.eat("1st Dinning Hall");
p2.study();

function Person(name) {
	this.name = name;
	this.eat = function(place) {
		alert(this.name + " is eating at " + place);
	};
}

function Student() {
	this.name = name;
	this.id = id;
	this.study = function() {
		alert(this.name + " is studying...");
	};
}

Student.prototype = new Person(this.name);
Student.prototype.constructor = Student;

var p1 = new Person("LUO Hao");
var p2 = new Student("LIAO Qiang", 1234);
p1.eat("Jinjiang Hotel");
p2.eat("1st Dinning Hall");
p2.study();

function ParentClass() {
		this.foo = function() {
			alert("This is common");
		}

		this.method = function() {
			alert("parent-class method");
		}
	}

	// just the same as static method of a class
	SubClass1.goo = function() {
		alert("gogo1");
	}
	SubClass2.goo = function() {
		alert("gogo2");
	}

	function SubClass1() {
		this.method = function() {
			alert("sub-class1 method");
		}
	}

	function SubClass2() {
		this.method = function() {
			alert("sub-class2 method");
		}
	}

	SubClass1.prototype = new ParentClass();
	SubClass1.prototype.constructor = SubClass1;

	SubClass2.prototype = new ParentClass();
	SubClass2.prototype.constructor = SubClass2;
 
	var o1 = new SubClass1();
	var o2 = new SubClass2();
	var array = new Array(2);
	array.push(o1);
	array.push(o2);

	for(var y in array) {
		if(array[y] instanceof SubClass1) {
			SubClass1.goo();	// like static method
		}
		else if(array[y] instanceof SubClass2) {
			SubClass2.goo();
		}
		array[y].foo();
		array[y].method();	//polymorphism method
	}