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principle. loops are not allowed in the package dependency graph.◆ SDP, stable dependency principle, and dependency in a stable direction.◆ SAP: the principle of stable abstraction should be consistent with the degree of abstraction of the package.: 1. OOD, full name: Object Oriented Design, that is, object-
() {Alert"Hi! I am "+ This. name); }varPerson1 =NewCreateperson (' ZS ',' Boy ',' 2001-02-03 ');varPerson2 =NewCreateperson (' ls ',' Boy ',' 2001-02-04 '); Person1.sayhi ();//outputs "Hi! I am ZS "Person2.sayhi ();//outputs "Hi! I am LS "In general, an object or class is more than one method and requires multiple methods to work with it.CreatePerson.prototype={ sayHi:function() { alert("Hi ! I am "+this.name); }, walk:function() {
package, it will affect all classes in the package, but it will not affect other packages. Package coupling principle No-ring dependency principle (Acyclic Dependencies Principle, ADP) The package dependency does not allow loops. Stable-Dependencies Principle, SDP) Dependency in a stable direction Stable-abstractions principle (SAP) The abstraction level of the package should be consistent with its stability. Old ti
Recently changed a new job, there are some problems in the interview process did not give the answer, for their technical short board and promote the urgent.JavaScript is the object of Everything (key: A value of a data), for the moment not to discuss the right and wrong sentence, you can imagine the importance of the object in JavaScript, and object-
used to trust the customer's request and isolate the direct dependency between the customer and the interface? System overhead. 2. Multi-inheritance separation: it is better to implement Customer requirements through multi-inheritance through interfaces. The above five are the main object-oriented design principles. They are like the Golden laws in
These days re-read the "Big Talk design mode", found that there are different sentiment, but also on the internet to find the "Agile software Development-principles, patterns and practices," a book, the preface of the book there is a paragraph I think very reasonable: "Beautiful things than ugly to create cheaper and faster." "The design of a software is not abou
Before we learn the seven principles of object-oriented design, we should have a good understanding of basic encapsulation, inheritance and polymorphism, as well as the ability to encode abstract classes and interfaces, because design patterns are the integrated application
Seven major object-oriented design principles (Transition) and seven major design principles I. Single responsibility principle: Full name: "Single-Responsibility Principle" Object-Oriented De
Sharing (six principles of object-oriented design model) and six design models I recently read an article titled "Please call me your first brother" on the six principles of the design mode. It is simple, easy to understand and can't help but repost and share it with me !!
1. Change is the natural enemy of reuse!The biggest advantage of object-oriented design is that it resists change2. Re-understanding Object-orientedUnderstanding Isolation Changes:From the macro level, the object-oriented approach
Interface An interface is a group of methods that can be called by another object. An object can have multiple interfaces. Type is a special interface of an object Different objects can have the same type. An object can have multiple types. An object can
Just like the location of Newton's three major laws in classical mechanics, the Open-Closed Principle is the cornerstone of object-oriented reusable Design (Object Oriented Design or OO
Labels: OCP Java design mode Object-Oriented Design1. Single Responsibility Principle The core idea of a single responsibility principle is: every object in the system should have only one independent responsibility, and all objects are concerned with the completion of their own responsibilities. SRP single Responsibil
subclasses.Appearance mode: Provides a consistent interface for a set of interfaces in a subsystem. The appearance mode defines a high-level interface, which makes the system easier to use.Enjoy meta-mode: effectively supports a large number of fine-grained objects for the execution of shared technologies.Proxy mode: Provides a proxy for other objects to control access to this object.All right, all the doors are on the stage and the war is on. We wait and see:The first thing to do is adapter mo
5 Programming styles and the abstractions they use: Process-oriented algorithms Object-oriented classes and objects Oriented to logical goals, usually expressed in predicate calculus Rule-oriented if--then the rule A constraint-invariant
In object-oriented design, how to deal with changes in design requirements through small changes is a matter of great concern to designers. To this end, many oo pioneers have proposed many object-oriented
This article mainly introduces the detailed description of the object factory functions and constructor In the javascript design mode, using the object literal or dynamically adding new members to the empty object, is the most easy-to-use object creation method. In addition
that the structure of the program is starting to become loose. Any change to the input or output device will force you to re-organize the condition judgment of the while loop. But after all, your program can work normally. But now you have reached the bottom line. If a hateful customer breaks your design by changing the demand, you will leave immediately. You made up your mind. Your crash ...... Unfortunately, it didn't take two weeks. You did
NEW: string equality comparisons in JavaScript The application of the image object is quite extensive, it appears in the desktop programming very early, the application is more mature, like c++,java,c# etc. And in the Web programming this piece, appear much later, so that the current web development is difficult, of course, there are many technologies involved in web development reasons. In recent years, object
depend upon details, details should depend upon abstractions.Another expression is:to program for the interface, do not program for implementation. The English definition is:Program to a interface, not an implementation.analysis of dependency reversal principleThe dependency reversal principle was Robert C. Martin's third engineering notebook in 1996 for the C + + Reporter column, which he later joined in his 2002 classic, Agile software Development, principles,
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