learning javascript design patterns

with others, "Don't Talk to strangers." In this way, the fire of the city gate is not implicating. Scalability and maintainability to improveUnderstanding these principles, and then looking at design patterns, is just how to achieve these principles on specific issues. Zhang Mowgli Learn Taijiquan, forget all the moves, down the "Xuan Power Chou", the so-called "heart without Strokes."

Design pattern (Patterns) --the foundation of reusable object-oriented software Design patterns are a set of repeated use, most people know, through the classification of purpose, code design experience Summary. Design

) { return value!== self; } ); return This ; };This, of course, can also be a form of the above function (1) (2):var unsubscribe=function publisher.subscribers= Publisher.subscribers.filter (function(value) { returnself ; }

will inevitably be a global pollution problem;2) The following is a general approach to the implementation of a lazy single exampleDocument.addeventlistener ('domcontentloaded', function () {Getsingle is a common method of creating a single casevargetsingle=function (FN) {varret; returnfunction () {returnret| | (Ret=fn.apply ( This, arguments)); }; }; //The following is an example of creating a unique landing floating window varCreateloginlayer=function () {varD

//Setting Propertiesobject.defineproperties (newObject, {' Somekey ': {value:' I Love You ', writable:true, Enumerable:true, Configurable:true }, ' Anotherkey ': {value:' I Hate you ', writable:true, Enumerable:true, Configurable:true }} );(2) constructor with prototype (constructor)When the JavaScript constructor is called to create an object, the new object will have all the properties of the constructor prototype.For example://Create a con

The original address, will continue to update the Http://it.zuocheng.net/mvc-design-pattern-design-principle-summary process technology BlogThis article takes the mainstream MVC framework as an example, such as Java ssh, PHP symfony and Zend Framework, after simply analyzing their design principles, find the design

; } }; })(); varproxyimg=(function () {varimg=NewImage; Img.onload=function () {//myimage.setsrc (IMG.SRC);MYIMAGE.SETSRC ( This. SRC); } return{sersrc:function (src) {myimage.setsrc ("File://c:/users/Desktop/loading.gif"); IMG.SRC=src; } }; })(); //Invocation ModePROXYIMG.SETSRC ('http://imgcache.qq.com/00.jpg');Third, Cache proxyCaching proxies can provide temporary storage for some expensive computations, or, as Ajax paging, the same page of data theoretically

JavaScript Design Patterns1. IntroductionJavaScript is a weakly typed language, but classes can be simulated by functionsThe most common implementation methods are as follows:function Car (model){This.model = model;This.color = "Red";This.year = "2012";This.getinfo = function () {return This.model + "" + this.year;}}Next we can use the top definition car to construct an instantiated object, like this:var my

=function (file) { This. Files.push (file);}; Folder.prototype.scan=function () {Console.log ('To start scanning folders:'+ This. Name); for(varI=0, len= This. files.length;i){ This. Files[i].scan (); }};varfile=function (name) { This. name=name;}; File.prototype.add=function () {Throw NewError ('File cannot be added under file! ');}; File.prototype.scan=function () {Console.log ('To start scanning files:'+ This. name);};//Testvarfolder1=NewFolder ('Technical Books');varfile1=NewFile ('

The design pattern is a solution to one or more problems. I have always wanted to learn the design model. I have also read some materials. I have also read many people's analysis and descriptions of the design model in the garden. I forgot to read it. So this time, write some content in the learning process here as

used.Two main uses of design patterns in software development.A common platform for developersDesign patterns provide a standard terminology system and are specific to specific scenarios. For example, a singleton design pattern means using a single object so that all developers who are familiar with the singleton

One, iterator pattern definitionThe iterator pattern provides a way to sequentially access individual elements in an aggregated object without exposing the internal representation of the object.In most of the current languages, the iterator pattern is already built in. Iterators have internal iterators and external iterators, and most of the implementations in the existing language are mostly internal iterators.Ii. each implementation in jquery //Each iterator similar to jquery$.each=function

interface function Carbuilder () {this.car = null; THIS.STEP1 = function () {This.car = new car (); }; THIS.STEP2 = function () {this.car.addParts (); }; This.get = function () {return this.car; };} function Truckbuilder () {this.truck = null; THIS.STEP1 = function () {This.truck = new truck (); }; THIS.STEP2 = function () {this.truck.addParts (); }; This.get = function () {return this.truck; };} function Car () {this.doors = 0; This.addparts = function ()

Design Patterns 1. Design modeWhy do you say design mode first? Because design patterns are the most basic of these concepts, they are also relatively simple. So what is design mode? To

; Document.body.appendChild (DIV); },8); Renderfriendlist ();Vi. Lazy Load functionThe first time you go to a branch, you override the function, and the second is not branching. varAddevent=function(elem,type,handler) {if(Window.addeventlistener) {//Non-IEAddevent=function(Elem,type,handler) {Elem.addeventlistener (Type,handler,false); } } Else if(window.attachevent) {//non-standard, only support IEAddevent=function(Elem,type,handler) {elem.attachevent (' On ' +Type,handler);

function, This points to window at this point;2. The purpose of these two functions in some cases is not to point to this, but to borrow other objects, such as class arrays such as arguments add data can be borrowed [].prototype.push.call; conversion to a real array can take []. Prototype.slice.call; intercept elements can be borrowed [].prototype.shift.call; the key to borrowing is that the internal implementation principles of these functions also apply to objects of class arrays, as long as

Single-Case modeA class can have only one instantiated object. such as the PopOver layer on the page, one page only needs one.Implementation: Create a class that contains a method that creates a new instance object without the presence of an object. If the object exists, this object simply returns a reference to the object.varSingleton = (functionSingleton () {varInstance =NULL;//Store a reference to a singleton instanceCreate a single casefunctionInit () {Private methods and propertiesfunctionP

The examples in the book are relatively easy to understand, but because it is written by foreigners, the habit of example is not very Chinese characteristics, may occasionally look awkward, there are language habits are not Chinese wind. 　　Of course, after reading this book, you will be able to understand exactly what design patterns can solve for you, and what problems cannot be solved for you (such as not

Bookstore Management SystemThe bookstore management system can be said to be a more classic example of design patterns and design ideas.This series will be divided into several sections on this transmission management system.Bookstore management system will be divided into: Users, books, purchase, sales and inventory of five modules, in addition to public package

programming language, any skill level.Reference Learning Php.net is a resource for PHP developers. Wikipedia has excellent articles on design patterns. C2 Wiki finds another good place to find information about design patterns such as observers, cells, and