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. NET, it is often possible to take advantage of the characteristics of events and delegates to implement the observer pattern, which is a more elegant scenario.Iii. examplesWe now use events to implement the Observer pattern. We design a simple example of a credit card consumption that requires a debit to the user's account while the user is being charged, as well as an SMS alert.The credit card class is defined first, and when the consumption amount
.run(); }}The operation requires interaction, first of all, the requirement to enter the H1 model of the Hummer if there is a sound, as follows:-------H1型号悍马-------- H1型号的悍马是否需要喇叭声响?0-不需要 1-需要输入“0”后的运行结果如下所示:-------H1型号悍马-------- H1型号的悍马是否需要喇叭声响?0-不需要 1-需要0悍马H1发动... 悍马H1引擎声音是这样的... 悍马H1停车...-------H2型号悍马-------- 悍马H2发动... 悍马H2引擎声音是这样的... 悍马H2停车...The results of the operation after entering "1" are as follows:-------H1型号悍马-------- H1型号的悍马是否需要喇叭声响?0-不需要 1-需要 1悍马H1发动...悍马H1引擎声音是这样的...悍马H1鸣笛..
change.Beverage.prototype.customerWantsCondiments =function(){ return true;//seasoning is required by default }; Beverage.prototype.init=function(){ this. Boilwater (); this. Brew (); this. Pourincup (); if( this. customerwantscondiments ()) {//If the hook returns true, the seasoning is required this. Addcondiments (); } };Do you really need to "inherit"?The template method pattern is one of the few inheritance-based desig
Category:
After learning about such a multi-mode model, many behavior patterns have also been designed during the learning process. What are the behavior patterns? One by one.
Iterator Mode
Http://blog.csdn.net/huo065000/article/details/24352437
Intermediary Mode
Http://blog.csdn.net/huo065000/article/details/22856883
Memorandum Mode
Http://blog.csdn.net/huo065000/articl
= 100.0f; Private floatdiameter = 10.0f; /*** Growth behavior, each call length and radius increase by one times*/ Public voidgrow () { This. diameter *= 2; This. Height *= 2; } /*** Reduce the behavior by half the length and radius of each call*/ Public voidshrink () { This. diameter/= 2; This. Height/= 2; }}View CodeClient class: Packageprototype;Importjava.util.Date; Public classClient {PrivateMonkey Monkey =NewMonkey (NewDate (),NewGoldringedstaff ()); Public voidChange () {//
developers, never care about these behaviors. The code is as follows:JavaScript var address = (function// address module function(obj) { Address.refresh (obj); }); return { function(avatar) { console.log (' Refresh receipt address List ');} } ;}) ();Advantages and Disadvantages
Supports simple broadcast communication and automatically notifies all subscribed objects;
After page loading publishers can easily have a dynamic association wi
. the difference between equals and = = Earlier we saw that both the Clone object and the equals and = = of the original object return false, whether it is a shallow copy or a deep copy. So what is the relationship between equals and = =? For basic data types, = = compares their values. For non-primitive types of objects, = = comparison is their address in memory, such as the previous oldobject and newobject the same address, while the Equals method, if it does not overwrite the quilt class, it
void Decrator (person component) {this.component = component; public override void Show () {if (component!=null) {component. Show (); }}}///base. Show ();}} class Jonson:finery {public override void Show () {Console.WriteLine ("Jeans"); Base. Show (); }} class Shose:finery {public override void Show () {Console.WriteLine ("Bull Shoes"); Base. Show (); } }}* Each functional layer is loaded together, then the inner function is called by the topmost instance
is the new Pegadapter, called Two-way adapter:1 Public classPegadapterImplementsiroundpeg,isquarepeg{2 3 Privateroundpeg roundpeg;4 Privatesquarepeg squarepeg;5 6 //Construction Method7 PublicPegadapter (Roundpeg peg) { This. roundpeg=peg;}8 //Construction Method9 PublicPegadapter (Squarepeg Peg) ( This. squarepeg=peg;)Ten One Public voidInsert (String str) {roundpeg.insertintohole (str);} A -} There is also a kind of called pluggable adapters, can dynamically
observers, that is, dependent objects, each time data changes, these 2 view will changeclassHexviewer (object):defUpdate (self, subject):Print 'hexviewer:subject%s has data 0x%x'%(Subject.name, Subject.data)classDecimalviewer (object):defUpdate (self, subject):Print 'decimalviewer:subject%s has data%d'%(Subject.name, Subject.data)if __name__=='__main__': Data1= Data ('Data 1') Data2= Data ('Data 2') View1=decimalviewer () view2=hexviewer () Data1.attach (view1) Data1.attach (view2) Data2.attach
Java classic 23 design patterns: behavioral patterns (4)
This article describes the policy mode, template method, and visitor mode in 11 behavioral design patterns.I. Policy Mode
Define a series of algorithms, encapsulate each of them, and make them replaceable. This mode allows algorithms to change independently of cu
Java implementation of structural design patterns-appearance patterns
I. Description
The appearance mode is also called the facade mode, which is to package a complex system. The external interfaces of the system are provided by the appearance class. When a complex system needs to provide external interfaces, it needs to encapsulate the interfaces provided extern
20170312: The reason for learning is that companies use Sprint.net, managed methods, prevent multiple instances of classes, waste space. NET Design Patterns:NET design Pattern Example Singleton pattern (Singleton pattern)One: Introduction to the Singleton mode: (Brief Introduction)Singleton mode (Singleton pattern), which guarantees that a class has only one instance, and provides a global access point to a
I. Introduction to the Model
Appearance patterns (façade pattern) can wrap a series of complex classes into a simple, closed interface. Also called the façade mode.
Second, the mode of intent
Each design pattern has its purpose, and we look at how the design patterns of the patriarch say it. According to Gof, the fa
This article references:: Geekband classroom content, Instructor: Li Jianzhong: Network information: http://blog.csdn.net/hguisu/article/details/7556625This article only as own study note, does not represent the authority, because is the beginner, has the mistake to please everybody correct, thanks.1, what is the Observer mode, where are the application sites?The Observer pattern (sometimes called the publish-subscribe subscribe> mode, model-view view> mode, source-listener listener> mode, or sl
flexibility and reusability of the program. On the other hand, it also helps to standardize the programming and improve the system development progress.There is also some advice: do not focus too much on the "design Patterns" of the program. Sometimes it's easier to write a simple algorithm than to introduce a pattern. In most cases, the code should be easy to understand and even cleaner to read. However,
Design pattern is a set of design pattern that is repeatedly used, known to most people, and classified,CodeSummary of design experience. The design pattern is used to make code reusable, make it easier for others to understand, and ensure code reliability.
There is no doubt that the
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