The so-called No recruit wins a recruit, practice a kung fu divides into internal strength and drilling. Drilling is like the moves, is the so-called 23 kinds of design patterns. But the internal strength, is the heart, that is the 6 kinds of laws. The light will drilling that is the huaquanxiutui, the internal strength is the realm. So many design patterns, after learning 2 times, 3 times may also forget t
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 façade pattern is intended to provide a consistent interface for a set of interfaces in a su
. Resulttextfield. Text= [NSString stringwithformat:@%f,[oper GetResult]];Through the refactoring of the simple Factory mode, we are idle the code structure of the low coupling degree, so that the external expansion open, the modification is closed. If you add any additional action methods, simply inherit the action method parent class, create a new action subclass, and add an else if to the simple factory class.AdvantagesThe simple factory method eliminates the coupling of the application-speci
Six principles of design patterns (5)-the six principles of design patterns
Definition:
An object should have a minimum understanding of other objects. The dimit rule is also known as the minimum Knowledge rule. It is called the Least Knowledge Principle (LKP) in English.
Personal Understanding:
The primary objective of the dimit rule is inter-class decoupling and weak coupling. Only when the class is wea
parametric construct, generates an object A through the new keyword, and then produces a new object T by A.clone (), then the constructor is not used when the object is copied. Be executed. That is, only one construction method is executed during the copy process.Clone vs final two pair of enemies. The object's clone is caused by a conflict with the final property within the object. In the programmer class above, modify to private final address address; Remove Get,set method, proto.address= (Ad
(); Ocar.excet (); }}Template method Pattern Applicable scenario
One-time implementation of an invariant part of the algorithm, and the variable behavior is left to subclass to achieve.
The public behavior in each subclass should be extracted and centralized into a common parent class to avoid code duplication. This is a good example of what Opdyke and Johnson described as "re-factoring to generalize." First identify the differences in the existing code and separate the differen
Introduction to design patterns, design patternsI. Introduction to design patterns
Design pattern is a set of summary of code Design experiences that are repeatedly used, known to most people, classified and catalogued. 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 design pattern is win-win for others and t
[Breadth traversal and depth traversal] talking about algorithms, design patterns, and breadth design patterns
In the evening, I was bored with writing a binary tree (graph)'s breadth and depth traversal algorithm. The algorithm itself is very simple, but how can it be universal? The code below is my design, please help me to see if there are any problems. I feel that there is a problem, that is, I don't kn
Simple factory with design patterns and factory with Design Patterns
I. DefinitionA simple factory is not a design pattern, but rather a programming habit.
Ii. Category chart
Iii. Example
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initialize, with the syntax of the Object.defineproperties or Object.defineproperty method type. It allows you to set properties such as enumerable, writable, or configurable.If you want to implement prototype mode yourself, instead of using object.create directly. You can use code like the following to achieve the above example:varVehicleprototype = {init:function(Carmodel) { This. model = Carmodel; }, Getmodel:function() {console.log (' vehicle mould is: ' + This. model); }};functionVehicle (
Php design patterns-Abstract factory patterns
Provides an interface for creating a set of related or interdependent objects without specifying their specific classes.
Features
Abstract Factory is a common software design model that provides a unified creation interface for a product family. When you need a series of product families, you can create a specific factory class for these product families
//because you want to use façade mode, instantiate the façade class142Facade * M_facade =Newfacade ();143 //let customers, unified use of the façade, to unify to dispatch those devices, decoupling144M_facade->Activate ();145cout "On the Live!"Endl;146M_facade->Deactivate ();147 148 return 0;149}activating the device to start live !Camera Open !Rotate the camera by 90degrees!Lights Open !Display Open !in Live !turn off the device !Camera off !Rotate the camera by 0degrees!Light o
Public voidVISITELEMENTB (CONCRETEELEMENTB b) - { - + } - } + A Abstract classElement at { - Abstract Public voidAccept (Visitor v); - } - - classconcreteelementa:element - { in PublicVisitor Myvisitor; - Override Public voidAccept (Visitor v) to { +Myvisitor =v; - } the * Public voidOperationa () $ {Panax Notoginseng - } the + Public voiddosomewor
) {objectstructure o=new objectstructure (); Attach (New Concreteelementa ()); O. Attach (New Concreteelementb ()); ConcreteVisitor1 v1=new ConcreteVisitor1 (); ConcreteVisitor2 v2=new ConcreteVisitor2 (); O.accept (v1); O. Accept (v2);//If the newly added operation is//concretevisitor3 v3=new ConcreteVisitor3 () as the following code; O.accept (v3);}Okay, now think about what time we use this model? In general, when the data structure is relatively stable, we use this pattern to encode, t
Design Patterns factory models, design patterns Factory
If you have a lot of money, your lifestyle is like this before you use the factory model:
If you want to go out, you must first find your own t-shirt, pants, and shoes. This is definitely troublesome, And everything needs to be done by yourself.
If you use the simple factory model, you will find a manager. However, the manager is rigid and has limit
. println ("\ n \ N "); 17 18 // Liu Bei is happy, remove the second 19 system. out. println ("-------- Liu Bei is happy, remove the second --------"); 20 context = new context (New givengreenlight (); 21 context. operate (); // executes the second tip 22 system. out. println ("\ n"); 23 24 // What should I do if Sun Quan's sub-troops have followed suit? Remove the third 25 system. out. println ("-------- Sun Quan's small army chased, what should we do, split the third --------"); 26 context = n
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