ideo principles of design

absolutely necessary for the documentation of SQL expressions; 5 Define the standard object naming conventions. 2, table and field design　　 1) Table Design principles (1) standardization and normalization; The standardization of data helps to eliminate data redundancy in the database. There are several forms of standardization, but third normal Form (3NF) is of

Design principles include: 1. Single responsibility principle, 2. Lee's replacement principle, 3. Dependency inversion principle, 4. Interface isolation principle, 5. The dimit law, 6. Open and Close principles. 1. Single Responsibility PrincipleSingle Responsibility Principle, SRP ): There shoshould never be more than one reason for a class to change. For a cl

In all the revolutions that have taken place in the software industry, two factions were once so widely rooted in the hearts of the people, structured programming and object-oriented programming. All mainstream modernProgramming LanguageBoth of them are under intense influence. In fact, if you don't want to write it like structured and object-oriented programmingProgramIt is a hard task. None of our mainstream programming languages are Goto, so they are subject to the most important prohibitions

User experience expert Mark Trammell, from Twitter, elaborated on Twitter's design principles, including the registration process, understanding of new users, loyal users, etc., worth seeing, recommending and watching how Facebook does design comparison reading Two data of concern Twitter's internal metrics for measuring products are registered users

submodule or business logic;Through the business logic compression interface in the public method, the interface often to review, as far as possible to get the interface to "flesh", rather than "fat doodle" a lot of methods;has been contaminated with the interface, as far as possible to modify, if the risk of a large change, the use of adapter mode for conversion processing;Understand the environment and refuse to follow blindly. Each project or product has specific environmental factors, don't

Opening part-Introduction to models and principles I have been in contact with the design model for nearly two years. I have been trying to write something to consolidate my learning, but I have never been able to do anything. I always want to write more time and knowledge, however, the longer it takes, the more time it feels that there will never be a proper time. Only continuous practice can be used for i

. Dependency inversion principle: high-level modules do not depend on low-layer modules, both of which are dependent on abstraction. Or just the example: Duck is a high-rise module, Fly is a low-level module. Duck does not depend on fly, the high-rise module changes slowly, while the lower-level modules change slowly.Abstractions should not be dependent on implementation details, and implementation details should be dependent on abstraction. Fly is an abstraction, it does not depend on how to fl

1. Overview Dr. Roy Fielding (see Personal homepage) is the main designer of the HTTP and URI protocol issued by the IETF. HTTP and Uri are the two most important web infrastructure protocols, so Dr. Fielding is one of the founders of the Web architecture. In addition to academic excellence, Dr. Fielding has been involved in the design and development of many Open-source software. He was the developer of Libwww-perl, one of the world's earliest HTTP

guarantee for the code to conform to the open and closed principles. At the same time LSP embodies: ◇ Class Inheritance principle: If an object of an inheriting class might run wrong where the base class appears, The subclass should not inherit from the base class, or it should redesign the relationship between them. ◇ Action Correctness Guarantee: From the other side, the extension of the class that accords with the LSP

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. Light will drilling that is huaquanxiutui, the internal strength is the situation.So many design patterns, learned 2 times. 3 times you'll probably forget just th

The typical object-oriented principles can be divided into two categories: class-oriented and package-oriented.Class-oriented includes: srp--single responsibility principle.ocp--Open closure principle.LSP--The principle of the Richter replacement.dip--dependency Inversion principle.isp--interface Isolation principle.Package-oriented include: The emphasis is on the cohesion of the package design requirements

Object-oriented design principles are at the heart of oops programming, but most of the Java programmers I've seen are enthusiastic about design patterns like Singleton (singleton), Decorator (adorner), OBSERVER (Observer), Instead of focusing enough attention on learning object-oriented analysis and design. It is impo

independent of the customers who use it.5. Advantages and DisadvantagesPros: Scalability is good. When we add a new module to the export, do not need to change the original code, only need to add a new import and export behavior class, and then the client side by setting the different behavior to determine the different import and export results.Cons: Increase in codeTherefore, judging the use of design patterns of standards, I think, is the function

(' Myctrl ', function () {});④ using the Controller:Ngcontroller directive: ng-controller= "Myctrl";⑤ in the controller's callback function, the $scope object is injected, specifying the model data: $scope. variable = value;⑥ Display:{{}}--ng directive:$scope scope control objects to connect model data to views;Initialize Data--nginit:$scope object;⑦ directive:Ng-click, Ng-dbclick, Ng-focus, Ng-blur;⑧ Note:Define model data, must inject $scope;In order to identify the variables and methods decl

Object-oriented design principles are at the heart of oops programming, but most of the Java programmers I've seen are enthusiastic about design patterns like Singleton (singleton), Decorator (adorner), OBSERVER (Observer), Instead of focusing enough attention on learning object-oriented analysis and design. It is impo

"/"; 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

. NET domain driven design-first taste (one: questions, patterns, principles, tools, processes, frameworks, practices)2013-04-07 17:35:27Tags:. NET DDD Driver Design original works, allow reprint, please be sure to use hyperlinks in the form of the original source of the article, author information and this statement. Otherwise, the legal liability will be invest

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