object oriented analysis and design ebook

modification of the situation to expand the system function To meet the requirements of open and closed principle. The dependency inversion principle is one of the basic principles behind the technologies and frameworks of COM, CORBA, EJB, and spring.4. Combination/Aggregation multiplexing principleThe combination/aggregation multiplexing principle, also known as the synthetic multiplexing principle, is to use some existing objects in a new object by

clause 32: Make sure your pubilc inherits the is-a relationship of plastic mold Make sure public inheritance models "Is-a" one of the most important rules for –c++ (OOP) object-oriented programming is that public inheritance (open inheritance) means "is-a" (a) relationship. – If you make class D ("derived") Inherit class B ("Base") as public, you tell the compiler that each

===================================== Another versionWhat are design principles? Design principles are basic tools. applying these rules can make your code more flexible, easier to maintain, and easier to expand.Basic Principles Encapsulation change Encapsulate what varies. It is intended for interface programming rather than implementing Code to an interface rather than to an implementation. Combinat

. The Notice package contains all command objects that process cache update notifications. The factory package contains the c‑factory class, this class generates the corresponding subclass object of the ccommand Class Based on the message header. The program code in the main package uses the ccommand class and the ccommandfactory class, so it inherits the creadcommand class according to the internal command package and internal factory; the class in

I entered school in September and graduated in July. It ended my pleasant and rich college life at the Software Institute. This series is a review of the four-year study of professional courses, see: http://blog.csdn.net/xiaowei_cqu/article/details/7747205 Object-Oriented Programming This is the first lesson in programming. I was also the first time in this course to get started with programming languages a

. During program design, we should always consider the best class design as much as possible, and do not modify it if it is well written. If there is a new demand, we add some classes to meet new requirements, and the original code will not move. It is absolutely impossible to disable the modification. No matter how closed the module is, there will be some changes that cannot be closed to it. Since it canno

Single Responsibility Principle for Object-Oriented Design Principles (SRP) This principle was once described in the books of Tom DeMaro and Meilir Page-Jones and called it cohesion ). They define cohesion as functional correlations between components of a module. Single Responsibility Principle (SRP) Single Responsibility Principle (SRP): For a class, ther

This paper analyzes the Object-oriented programming method of PHP. Share to everyone for your reference, specific as follows: During the development of super large projects, if the use of process-oriented development, the amount of code is very large, which will use a lot of judgment and loop nesting, and many very similar code, not only to make the project code

Chapter I. INTRODUCTION1. What is design mode?Design patterns are the core solutions that people use to solve similar problems and solve such problems. Design patterns are used to implement design reuse.2. Four elements of design patternName: Describes the problem, solution,

The synthetic multiplexing principle, also known as the combinatorial/aggregation multiplexing principle (composition/aggregate reuse Principle, CARP), is defined as follows: Synthetic multiplexing principles (Composite reuse Principle, CRP): Try to use object combinations instead of inheritance to achieve reuse. The principle of synthetic multiplexing is to use some existing objects in a new

Object-oriented callback functions The design method of process language C has corresponding implementation methods in object-oriented language C + +. The object-oriented

concerned about: Publicclass User { public bool IsValid () { if (username.length > 0 isemailvalid ()) { //.... } //... } BOOL Isemailvalid () { return email. Contains ("@") (email. EndsWith (". com") | | Email. EndsWith (". Biz")); } public string EmailAddress () { return string. Format ("\" {0}\ " } private String Convert () { if (email. IndexOf (' # ')! =-1) { return email. Replace (' # ', ' @ '); } } } I think maybe we're missing an email concept, so we can encapsulate these methods and

Copy the codeCode is as follows: /* PHP Object-Oriented Program Design * * PHP5 * * And an array of objects: all belong to the PHP compound type (a variable can store multiple Unit) * * Object than an array of more powerful, not only can store more data, can also be a function of

further analysis of the system, it was found that the process of sending mail was the same for both ordinary customers and VIP customers, meaning that the code in the two Send () methods was duplicated, and that new types of customers would be added to the system. To make the system more scalable, and to reduce code duplication, it is reconstructed using the Richter substitution principle. In this example, you can consider adding a new abs

I. An important experience in object-oriented design:Who owns the data, who provides a way to manipulate the data externally.Two. Several typical cases of object-oriented1. People draw round on the blackboard2. Train driver Emergency brake3. Sales clerk statistics of the amount of small votes harvestedThree. Object-

before we start the Android software app, we need to make a preliminary understanding of object-oriented design principles and design patterns. Talent in the future combat process, less detours. Make our software development career feel happy and relaxed. Okay, nonsense, let's talk about the software development

Simple and modular maintenance is a feature of object-oriented programming. Objects are represented as classes with the same functions in the same namespace. We can add a class in the namespace without affecting other members of the namespace.Extensibility object-oriented programming essentially supports extensibility.

define a large number of access methods in the public interface. A large number of access methods means that the relevant data and behavior are not centrally stored. (15) Be more careful with classes that contain too much communication behavior. P31 Another manifestation of this problem is the creation of many get and set functions in the public interface of the classes in your application. (16) In an application composed of an object-

First, we need to know what the mode is: In short: while people constantly discover problems and find solutions to problems in their own environments, discovering different problems actually involves a common nature. These essence is what we call models. Therefore, the model is representative. In the Object-Oriented field, the earliest modeling method research was published in 1995 by Gang of Four (gof, Eri

Object-oriented design is a very important part in php program development. if you want to become a senior php programmer, we must know the specific usage and maintenance of object-oriented design. simple modularization