eip patterns

Use php to output different heart-shaped patterns and php heart-shaped patterns First, we will share with youPhp output heart-shaped curveThe Code is as follows: The effect is as follows: Output Cartesian heart pattern using phpThe Code is as follows: Copy codeThe Code is as follows: $ width = 600; $ height = 650; header ("Content-type: image/gif"); $ img = imagecreate ($ width, $ height ); // create an i

Common iOS design patterns-simple factory design patternsDetailed description of simple factory design mode Simple factory design patterns basic concepts structure diagram classic sample code advantages and disadvantages usage conditionsBasic Concepts "A dedicated class is defined to create instances of other classes. The created instance usually has a common parent class ."In the world, a factory class dyn

Common iOS design patterns-Observer Design PatternsObserver Design Patterns Observer Design Pattern description basic concepts nsicationicationcenter use add listener receive message deletion monitoring KVO use basic concepts register observer object change callback method remove observer identity code implementationBasic Concepts The observer mode defines a one-to-many dependency, allowing multiple observe

Common iOS design patterns-singleton Design PatternsDetailed description of Singleton Design Mode Basic concepts of Singleton Design Patterns in IOS when Singleton mode is used, basic steps for creating Singleton mode in a non-ARC environment, detailed code for creating Singleton mode in an ARC environment procedureBasic Concepts The Singleton mode is a common software design mode. Its core structure only c

Common PHP factory design patterns, php Factory Design Patterns I. Factory ModelIs a type that has some methods for creating objects for you. You can use the factory class to create objects instead of using new directly. In this way, if you want to change the type of the created object, you only need to change the factory. All codes used in the factory are automatically changed. The following code shows an

Design Patterns learning notes -- Abstract Factory patterns After several days of struggle, I finally understood some differences between the abstract factory and the factory method model. Abstract Factory is similar to the factory method mode. They all follow the open-closed principle and use the factory interface to create a derived factory and then create the corresponding object. But the abstract fact

Design Patterns ---- adapter patterns Converts an interface of a class to another interface that the customer wants. The Adapter mode allows the classes that cannot work together due to incompatibility of interfaces to work together.Solved problems: That is, the Adapter mode makes those classes that cannot work together due to interface incompatibility work together. Class diagram: Role in the Mode

Design Patterns-singleton patterns The Singleton mode is an object creation mode. The Singleton mode ensures that only unique instance objects are generated for a class. That is to say, in the whole program space, the class only has one instance object. This ensures that only one instance exists for a class and provides a globally unique access point for this class. Singleton mode class diagram: In

Design Patterns-factory patterns 1. Abstract base class inheritance is used to construct the entire system based on the subordination between the abstract base class and the abstract base class to achieve a relatively clear class hierarchy. 2. Maintain scalability and minimum maintenance costs for the entire system. Have I made it clear? Above code, ^ _ ^. //////////////////////////////////////// //

Question link ~~> Question recognition:After doing this, I learned a lot. First, I learned about the state compression push formula. Solution: Constructor matrix:B [I] [J] (I, j is in the state, 0 Code: # Include Sgu 197 nice patterns strike back | zoj 2317 nice patterns strike back

Design Patterns-abstractfactory patterns 1. Replace the abstract base class in the factory mode with the interface class. The difference is that the abstract base class cannot be instantiated, while the interface class can. For example, replacing a car with a 4S shop, Class car 4s stores{Public:Automobile 4S stores ();Vitrual ~ Automobile 4S stores (); Virtual tire * tire () const {return new tire ;}Virtual

Create bean Factory all useFactory methodFor the production of fixed products in the same grade structure support to increase any productAbstract FactoryAll products for the production of different product familiesAbstract product family can be added to the inability of the productPrototype mode (copy, clone)You need to implement the Cloneable interface using the Clone () method to copy a close () method such as a file streamCreating an object with new requires very tedious data preparation or

implementation is packaged into a class, if there are many alternative strategies, then the number of these classes is very large.To recognize a policy pattern from a code perspective:(Zhao Yun with three tricks to solve the problem, there are three elements in this scene: Three ingenious tricks, one capsule, one Zhao Yun)1. First create a policy interface (contains an algorithm that can be executed by each of the tips)2. Then write three implementation classes, because there are three clever t

of the current object */ Bytearrayoutputstream BOS = new Bytearrayoutputstream (); ObjectOutputStream oos = new ObjectOutputStream (BOS); Oos.writeobject (this); /* read out the new object generated by the binary stream */ Bytearrayinputstream bis = new Bytearrayinputstream (Bos.tobytearray ()); ObjectInputStream ois = new ObjectInputStream (bis); return Ois.readobject (); } Public String getString () { return string; } public void SetString (string string) {

!OBSERVERLIST.CONTAINS (Observer)) {OBSERVERLIST.ADD (Observer);}}@Overridepublic void Delete (Observerinterface observer) {if (Observerlist.contains (Observer)) {OBSERVERLIST.REMOVE (Observer);}}@Overridepublic void Notifyobserver () {if (isnotify) {for (Observerinterface object:observerlist) {Object.update (mess);}}}@Overridepublic void givemess (String message) {if (mess.equals (message)) {Isnotify = false;} else {Mess = message;Isnotify = true;}}}Viewer interface:Package com.design2;Public

pcname) {if("Dell". Equalsignorecase (Pcname))return NewDellcomputer (); if("Lenovo". Equalsignorecase (Pcname))return NewLenovocomputer (); return NULL; }}5). Computer Operation class /** * Computer Operation class, Call factory to create PC * [emailprotected] * December 25, 2017 */ public class Computeroperator { /** * Create PC * @param pcname computer name * @param Span style= "COLOR: #008000" > description computer description */ public void Createcomputer ( Stri

, filterinputstream,filteroutputstream Concretedecorate Specific Decorative roles: responsible for adding new responsibilities to component objects, Bufferedinputstream,bufferedoutputstream, etc. Advantages Extended object functionality is more flexible than inheritance and does not result in a dramatic increase in the number of classes. You can decorate an object multiple times, creating a combination of different behaviors and getting more powerful objects. The concre

observer;/** * Specific observer classes, such as LV Zeng in the example, Zhang Wei is an example of the Observer * @author WL * */public class Concretewatcher implements watcher { String Watcheredname; String Name;public concretewatcher (String name,string watcheredname) {this.name=name;this.watcheredname= Watcheredname;} @Overridepublic void Updata (String str) {System.out.println (name+ "Heart secretly happy" Hey!!! The opportunity came, my "+watcheredname+" said she ' "+str+" ' "");}Package

);/** * update Price */ Food.setprice (1.5f);}}third, the application scenarioGUI frame, meteorological observation, etc.Iv. SummaryBe sure to call the Setchanged () method before notifying all observers to set the state of the observer to be changed so that notifyobservers () will not be updated with the Observer Update method. If there are different opinions or omissions in the above content, please give us some valuable suggestions or comments.Finally, you can try to use the following UML mod

(); } } } public class Mysubject extends Abstractsubject { @Override public void operation () { System.out.println ("Update self!"); Notifyobservers (); } } Test class: public class Observertest { public static void Main (string[] args) { Subject sub = new Mysubject (); Sub.add (New Observer1 ()); Sub.add (New Observer2 ()); Sub.operation (); } } Output:Update self!Observer1 has rece