JavaScript-Learning/Object.html at master · xiazhe/JavaScript-Learning · GitHub

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<!DOCTYPE html>

<html>

<head>

<title>Object</title>

</head>

<body>

//面对对象

var Person = new Object();

//console.log(Person);

//Object {}

var $error;

//var a, b, c;

//c = 1;

//a = b || c;

//console.log(a);

//1

//function Person() {

//}

//Person.prototype.name = "尼古拉斯.赵四";

//Person.prototype.age = 25;

//Person.prototype.sayName = function () {

// console.log(this.name);

//}

//var person = new Person();

//person.sayName();

//对象创建

var objA = new Object();

var objB = {};

//console.log(typeof objB); // "object"

//console.log(objA === objB); //false

// 克隆对象

function clone(obj) {

// Handle the 3 simple types, and null or undefined

if (null == obj || "object" != typeof obj) return obj;

// Handle Date

if (obj instanceof Date) {

var copy = new Date();

copy.setTime(obj.getTime());

return copy;

}

// Handle Array

if (obj instanceof Array) {

var copy = [];

var len = obj.length;

for (var i = 0; i < len; ++i) {

copy[i] = clone(obj[i]);

}

return copy;

}

// Handle Object

if (obj instanceof Object) {

var copy = {};

for (var attr in obj) {

if (obj.hasOwnProperty(attr)) copy[attr] = clone(obj[attr]);

}

return copy;

}

throw new Error("Unable to copy obj! Its type isn't supported.");

}

//通过原型继承创建一个新对象

function inherit(p) {

if (!p) {

throw TypeError("p is not an object or null");

}

if (Object.create) {

return Object.create(p);

}

var t = typeof p;

if (t !== "object" && t !== "function") {

throw TypeError("p is not an object or null");

}

function f() { };

f.prototype = p;

return new f();

}

</script>

</body>

</html>

JavaScript-Learning/Object.html at master · xiazhe/JavaScript-Learning · GitHub

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