Example parsing js prototype and call()

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/*
原型也是一个对象
把共有的属性或者方法放在原型中
*/

//Person.prototype 原型
/*Person.prototype = { } 祖先*/
Person.prototype.name = "这是祖先的名称 ";
/*多个属性可以这样定义*/
Person.prototype = {
    age : 20,
    sex :"女",
    constructor : Car
}
/*构造函数*/
function Person(sex){
    this.sex =sex;
}

function Car() {
}

/*子孙类可以继承父类的属性和方法,但是子类对象不能修改父类的对象的属性，只能自己进行操作才可以实现
也就是说person.name= "这是祖先的名称 "
*/
 var person = new Person();
/*constructor是对象的构造函数*/
console.log(person.constructor)


Animal.prototype.name = "这是个动物的类";
function Animal() {

    /*这里可以理解为放对象没有这个属性的时候才会去原型中查找,其中也可以改变原型的指向*/
//    var this ={
//     _proto_ : Animal.prototype
// }
}

var animal = new Animal();

//其中注意一下两种写法
Animal.prototype.name = " 这是另外一个动物的类";   //打印Animal.prototype.name = " 这是另外一个动物的类";这个可以这样理解修改的是属性

Animal.prototype = {
    name : " 这是另外一个动物"
}
// Animal.prototype.name = " 这是个动物的类";

/*创建对象*/
var obj = Object.create(原型);


/*call 和apply的作用*/
function Person1(name, age) {
    /*其中这里的this == object*/
    this.name = name;
    this.age = age;
}

/*这里的Student调用Person1的函数*/
function Student (name, age ,grade) {
    /*Person1.apply(this , [name, age]);*/
    Person1.call(this ,name,age);
    this.grade =grade;
}

var student = new Student('JJJJJ',20,1);


var person1 = new Person1('ZK',100);
var object = {

}
/*call的作用是：改变this的指向*/
Person1.call(object ,'zhe',52);

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