lylijincheng

/**
 * Example1: 
 *   var Person, man;
 *   Person = Klass.create();
 *   Person.implement(EventEmitter);
 *   man = Person.instance();
 *   man.on('say', function(what) { alert(what); });
 *   man.trigger('say', 'balabala...');
 * 
 * Example2: 

lylijincheng

var __hasProp, __extends;

__hasProp = {}.hasOwnProperty,
__extends = function (child, parent) {
    for (var key in parent) {
        if (__hasProp.call(parent, key)) child[key] = parent[key];
    }
    function ctor() {
        this.constructor = child;
    }

lylijincheng

#!/usr/bin/env ruby

class MegaGreeter
    attr_accessor :names

    # Create the object
    def initialize(names = "World")
        @names = names
    end

lylijincheng

// jqia
对象的本质是一个无序的 “名/值” 对应关系的集合，名称是字符串，值可以是任何Javascript对象。

// this
在基于面向对象的语言里，`this`参数通常引用类的实例（方法在类中声明）。在Javascript中函数也是对象，
`this`所引用的对象被称为函数上下文，它不是由如何声明函数，而是由如何调用函数决定的。意味着更具函数
如何被调用，同一函数可以有不同的上下文。在默认情况下，函数调用的上下文（this）是对象，其属性包含可
以调用该函数的引用。

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// Prototypal Inheritatance Definition:
// When accessing the propertyies of an object, Javascript will traverse the prototype chain 
// upwards until finds a property with the requested name.

// Most Javascript implementations use __proto__ property to represent the next object in the
// prototype chain.

// Note: __proto__ is non-standard and should not be used in your code. 

lylijincheng

// Create an object with "No Properties"
var person = Object.create(null);

Object.defineProperty(person, 'fisrtName', {
    value: "Jin Cheng",
    writable: true,
    enumerable: true,
    configurable: true
});

lylijincheng

// Safari on iOS viewport

// Executed at window onload.
this.viewport = function() {

    var width, height, screenWidth, screenHeight, innerWidth, innerHeight, isSafariOnIOS, orientation, userAgent;

    screenWidth  = window.screen.width;
    screenHeight = window.screen.height;
    innerWidth   = window.innerWidth;