Javascript面向对象

//Coder:Zhang Liang
var student1={
    "name":"zhang liang",
    "age":18,
    "course":["Math","English"]
    }
//show each property
document.writeln(student1.age);
document.write("<br/>");
//another display property
document.writeln(student1["age"]);
document.write("<br/>");
//add a new property
student1.classmate="Yu Gang";
document.writeln(student1.classmate);
document.write("<br/>");
//get the every propery in object
for(var property in student1)
{
    document.write(property+"==>"+student1[property]);
    document.write("<br/>");
}
//function is also object
var Teacher=function(name)
{
    document.writeln("this is my name: "+name);
    document.write("<br/>");
}
Teacher("Zhang Liang");
//add a property to function
Teacher.age=38;
document.writeln("my age is "+Teacher.age);
document.write("<br/>");
//function can be used as a parameter
var Write=function(str)
{
    document.writeln(str);
    document.write("<br/>");
}
var ShowName=function(name,func)
{
    func(name);
}
ShowName("Huang Hua Xian",Write);
//functions as return values
var Plus=function()
{
    return function(left,right)
    {
        return left+right;
    }
}
var GetSum=Plus();
Write(GetSum(7,8));
//functions stored as array elements
var array=[];
array[0]=Write;
array[1]="Huang Shu Fang";
array[0](array[1]);
//there isn't concept "Class" in javascript,only for Construtor
//when there is a this property in function,the function is a Construtor
var Dog=function(name)
{
    this.name=name;
    this.responseTo=Write("Hello,"+this.name);
}
//var Kitty=new Dog("Kitty");
//Kitty.responseTo();
//static property and function
var Employee=function(name)
{
    this.name=name;
}
Employee.Prompt=function()
{
    alert("Yes,you are ok!");
}
Employee.Count=0;//static property
Employee.Prompt();
alert(Employee.Count);
//private property
var Master=function(name)
{
    var _name=name;//_name is a private property
    this.Name=_name;
}
var Terry=new Master("Terry");
Write(Terry.Name);
//toString
var Pet=function(firstName,secondName)
{
    this.firstName=firstName;
    this.secondName=secondName;
}
Pet.prototype.toString = function()
{
    return this.firstName+" "+this.secondName;
}
var me=new Pet("Terry","Joen");
Write(me);
//inherit
//JavaScript 中的函数是对象。每个函数对象都有一个名为 call 的方法，它将函数作为第一个参数的方法进行调用。就是说，作为函数第一个参数传递给 call 的任何对象都将在函数调用中成为“this”的值。
var Cat=function(firstName,secondName,age)
{
    Pet.call(this,firstName,secondName);//think Dog : base(name)
    this.age=age;
}
Cat.prototype=new Pet();//this makes Cat.prototype inherits from Pet.prototype
// remember that Pet.prototype.constructor points to Pet. We want our Dog instances'constructor to point to Cat.
Cat.prototype.constructor=Cat;
//overide toString()
Cat.prototype.toString=function()
{
    return this.firstName+" "+this.secondName+"_"+this.age;
}
var cat=new Cat("MiMi",".T",18);
Write(cat);
//namespace
var System={};
System.IO={};
System.IO.Console=function(name){};
System.IO.Console.prototype.Write=function(str)
{
    document.write(str);
    document.write("<br/>");
}
var console=new System.IO.Console();
console.Write("Hello,Zhang Liang!");