head first object oriented analysis and design

"from the interview caused by the thinking: b/S and C/S is what"), so decisive in today spent an afternoon of time, side want to write, and finally finished, Also hope that we can benefit from the two articles themselves are not very deep and very new technology, but as a programmer, if you want to have technical attainments, must first learn the basic skills, I repeat my point of view:Technology is like martial arts, basic skills is very important, as long as the basic skills, and then to lear

"Design mode" This word almost become synonymous with software design, many people very naïve thought mastered the design model to master the software design , but in fact, if only to grasp the design mode, the software design doo

For the design of object-oriented software systems, improving system reusability while supporting maintainability is a crucial issue, how to Improve the maintainability and reusability of a software system at the same time is one of the core issues that need to be addressed in object-

In the previous article, we talked about the design patterns. Next, let's talk about some of the principles we often follow in object-oriented design. These principles are the result of numerous previous experiences. Only by following these principles can you involve excellent code. Today we will talk about seven princ

One1, the core of object-oriented thinking:　　Encapsulation, inheritance, polymorphism.2, the pursuit of object-oriented programming:Cohesion-poly low-coupling solution;Modular design of the code;3, what is the design mode:The clas

1. To learn the design mode, first understand what the design mode is: 1. What is the design model? The design pattern describes a general solution to a type of common problems in the software design process. 2. What is an object-

"; $ beverage3 = new HouseBlend (); $ beverage3 = new Soy ($ beverage3); $ beverage3 = new Mocha ($ beverage3 ); $ beverage3 = new Whip ($ beverage3); echo $ beverage3-> getDescription (). "$ ". $ beverage3-> cost (). "\ n";?> Status mode The code is as follows: count = $count; if ($count > 0) { $this->state = self::NO_QUARTER; } } public function insertQuarter() { if ($this->state == self::HAS_QUARTER) { echo "You can't insert another quarter!\n"; } else if ($this->state == self::NO_QUARTER)

Three basic elements of object-oriented architecture: encapsulation, inheritance, and Polymorphism Five basic object-oriented design principles: Single-Resposibility Principle) Its core idea is: A class. It is best to do only one thing and only one change that causes it. The

What is object-oriented design? What content does it contain? What are the benefits it brings? What do you need to pay for it? In today's time, it seems silly to ask these questions, because almost every software developer knows how to use a certain object-oriented Programm

rules of the class.Properties and Methods Casting from the Mold (object), there are a lot of parameters (length, width, height, etc.), can complete different operations (cooking, load-bearing, protection of internal parts, etc.). The argument here is the object's "property", and the complete operation is the object's "method". A property is a variable that represents the characteristics of an object, suc

reasons such as the need to modify the original code of the software, may introduce errors in the old code, or we will have to refactor the entire functionality, and the original code needs to be tested again. This has a special impact on our entire system, which also fully shows the coupling of the system if too high, will greatly increase the later expansion, maintenance. In order to solve this problem, people have summed up the principle of opening and closing. The fundamental solution to th

(string audiotype) { switch (audiotype.tolower ()) { case ("MP3"): PlayMp3 (); break; case ("wav"): playwav (); break; } } } Naturally, you will find this design very bad. Because it does not provide a minimum scale for future changes in requirements. If your design turns out to be the case, then when you're overwhelmed by the overwhelming demand change, you might want to get the

Object-oriented design patterns and principles 01. Introduction to Design Patterns:650) this.width=650; "title=" QQ picture 20150427231535.png "Src=" http://s3.51cto.com/wyfs02/M01/6C/0A/ Wkiol1u-wnmtuinbaacmezbs9jc247.jpg "alt=" Wkiol1u-wnmtuinbaacmezbs9jc247.jpg "/>Each pattern describes the problem of the stomach as

When we first came into contact with object-oriented thinking, I think the first concept we came into contact with should be" Class ", We have been discussing profound issues such as how to design classes and how to implement classes, but have we ever thought about what is called" classes "and what is the essence of classes ?. According to the introduction in mo

change should be closed for the module he designed. He must first guess the most likely types of changes, and then construct an abstraction to isolate those changes.Take action immediately when changes occur. When we first wrote the code, we assumed that the change would not happen. When a change occurs, we create an abstraction to isolate similar changes that occur later.In the face of requirements, changes to the program are made by adding new Code, rather than changing the existing code.We h

Recently in the "Head First design mode" is really a good book, in layman's terms, with specific scenes to the common design patterns are very thorough. Slightly sadly, the examples in this book are written in Java and written for us. NET seems to be a little bit uncomfortable. So I wrote the example of each pattern in the book in C #, and, by the way, made some

3 basic elements of object-oriented: encapsulation, inheritance, polymorphism Object-oriented 5 basic design principles: single Duty principle (Single-resposibility Principle) Its core idea is: A class, it is best to do only one thing, only a change that caused it. The princ

The term "Object-Oriented Software Design" and its related topics have become familiar to many developers and even get tired of hearing it. However, to attract attention and attract the attention of the "opposite sex", this topic is still a topic to choose this hot topic as the topic of this blog. Please forgive me. I also hope you can put down the shelf and skip

I have been doing program design for the object-oriented design model for a short time. I recently went to several companies for an interview and was asked about the object-oriented design