bauhaus design principles

"/"; return NewChu ($a,$b); Break; Case"%"; return NewQuyu ($a,$b); Break; } } } $j= Gongchang::d uixiang (3,2, "%");//Test Echo $j->js ();//OutputOutput resultsSecond, the design of six major principles1. The open-close principle is that the design should have good support for the extension, and the modification should be strictly limited.2. On the Richter scale also, the subclass mu

Seven major design principles:1. Single Duty principle: one class is responsible for a duty.2, the Richter replacement principle: Subclasses can extend the function of the parent class, but cannot change the original function of the parent class.3, dependency inversion principle: The high-level module should not rely on the lower layer module, both should rely on its abstraction; abstraction should not depe

Ryan Boudreaux, primarily for the hospitality industry and the federal government, wrote a series of articles on four design principles, the first Effective design principles for Web Designers:contrast , as follows: If you have received a formal course in design, you may ha

create the right abstraction.The open-close principle is the core of object-oriented design. Following this principle can lead to significant benefits to the technology that are maintainable, extensible, reusable, and flexible. Developers should abstract only those parts of the program that are showing frequent changes, but it is also not a good idea to deliberately abstract each part of the application. Rejecting immature abstractions is as importan

base classDo not let classes derive from specific classesA variable cannot hold a reference to a specific class6: Abstract Factory Method mode provides an interface for creating a family of related or dependent objects without having to specify a specific class.The factory method pattern uses inheritance: Delegate the creation of objects to subclasses, subclasses implement factory methods to create objects, and abstract factory method patterns use a combination: object creation is implemented i

1. Design Principles (1) User principles. Human-Machine Interface Design must first be establishedUser type. The classification type can be determined from different angles according to the actual situation. Determine the type and predict their response to different interfaces based on its characteristics. This require

coupling. ----- The concrete coupling relationship. The two classes are dependent on each other, This is the specific coupling relationship. If a specific class directly references another specific class This relationship is generated. ----- Abstract coupling relationship, which occurs in a specific class and a smoke In this way, the maximum flexibility is maintained between classes that must have a relationship. Why is dependency inversion?The dependency between object-oriented prog

) When using the data-oriented SQL language for programming, the optimization algorithm should be taken as far as possible.In conclusion, in order to improve the efficiency of database operation, it must be optimized from database system level, database design level, program implementation level, and the threeAt the same time on a level.The above 14 skills, is a lot of people in a large number of database analysis and

example, the coding logic of a program, the actual SQL statement used, is divided within the scope of the application design. Factors that affect the performance of DB2 systems include, for example, installation options, buffer pool size, allocation priority for the DB2-related address space, and so on. The focus of this paper is the design of DB2 database. But there are times when the boundaries between t

As we all know, design principles are the cornerstone of design patterns. When the design principles are followed, the written code becomes very flexible and can cope with changes and be easier to maintain. Of course, it is not so absolute. Next, we will briefly introduce so

designers say web pages should be loaded in 15 seconds. 05 Website Upgrades Always pay attention to the operation of the website. Well-performing hosts may run slowly as the number of visitors increases. However, if you don't want to lose your visitors, be sure to plan your upgrade plan carefully. 06 adherence to basic principles Even if you don't understand HTML, you can create a Web site that looks reasonable by simply buying a copyrighted, WYS

system sideAfter the processing of the C + + language is completed, the final storage is appended to the table. This is the experience of telecom billing system design. (3) If a table is found to have too many records, such as more than 10 million, the table is split horizontally. The horizontal split is done with the table primary key A value of PK is a line dividing the table's records horizontally into two tables. If you find that there are too ma

Com.raylee.designpattern.strategy.ch04;public class Client {//The user, Department, and course are subject to additional deletions public static void main (string[] args) {Courseserviceimpl Courseserviceimpl = new Courseserviceimpl (); Courseserviceimpl.importcourse (); Courseserviceimpl.exportcourse (); Userserviceimpl Userserviceimpl = new Userserviceimpl (); Userserviceimpl.importuser (); Userserviceimpl.exportuser () ;D Eptserviceimpl Deptserviceimpl = new Deptserviceimpl ();d eptserviceimp

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

sideAfter the processing of the C + + language is completed, the final storage is appended to the table. This is the experience of telecom billing system design.(3) If a table is found to have too many records, such as more than 10 million, the table is split horizontally. The horizontal split is done with the table primary keyA value of PK is a line dividing the table's records horizontally into two tables. If you find that there are too many fields

system sideAfter the processing of the C + + language is completed, the final storage is appended to the table. This is the experience of telecom billing system design.(3) If a table is found to have too many records, such as more than 10 million, the table is split horizontally. The horizontal split is done with the table primary keyA value of PK is a line dividing the table's records horizontally into two tables. If you find that there are too many

sideAfter the processing of the C + + language is completed, the final storage is appended to the table. This is the experience of telecom billing system design.(3) If a table is found to have too many records, such as more than 10 million, the table is split horizontally. The horizontal split is done with the table primary keyA value of PK is a line dividing the table's records horizontally into two tables. If you find that there are too many fields

Original link: API Design principles–qt WikiBased on Gary's influence on Gary Gao's translation: API design guidance for C + + QT's design level is well-known in the industry, consistent, easy to master and powerful API is one of QT's most famous advantages. This article is the QT official web API

perspective. Although we have a single responsibility for an interface subdivided from a single responsibility, we sometimes find that even if we have applied a single responsibility principle, there are still many methods in the interface, at this time, our interface isolation principle is required. 2. Connection Between the interface isolation principle and the single Responsibility Principle The single responsibility principle is to abstract and segment interfaces from the business perspecti

Code that complies with the following six principles is generally considered to be extensible, maintainable, and highly reusable code: 1. Principle of single responsibility Don't meddle. 2. The principle of open closure Open to extension, closed for modification 3. Richter substitution principle Subclasses can implement abstract methods of the parent class, but they cannot override non-abstract methods of the parent class. Subclasses can add their ow