design patterns reusable object oriented

About object-oriented design patterns

Abstract Factory Model VDefinition: Provides an interface that creates a series of related or interdependent objects without specifying their specific classes. (There are constraints between the created objects)The essence of Abstract factory model: The realization of selecting product clustersAdvantages: Separation of interfaces and product families makes it easy to switch product clustersCons: Not easy to expand new products, easy to create class hierarchy complexFactory method

Object-oriented design principles: seven Principles1, single duty principle SRPDefinition: Every class in a system should have only one responsibilityBenefits: cohesion, low coupling2, open and closed principle OCPDefinition: Open for extension, close for modificationBenefits: Adaptability and flexibility, stability and continuity, reusability and maintainability

First, the three main characteristics of object-oriented reply: encapsulation: Masking internal details, calling external interface to implement corresponding function (function call) Inheritance: Subclass inherits attributes and methods in parent class polymorphism (no polymorphic concept in JS) Ii. inheritance suggestion reply: Inherit: Subclass inherits properties and methods from parent class, these pro

the initialization of the variables. Private Singleton () {} public static Singleton getinstance () { return instance; } }Like static initialization, it instantiates itself when it is loaded, which is called: a hungry man Singleton class . And like the previous singleton pattern, to be quoted for the first time, it is called a lazy Singleton class .A hungry man is an object that is instantiated as a class is

PHP object-oriented programming and design patterns (4 ). PHP advanced programming study notes exceptions are often used to handle various types of errors encountered during normal program execution. For example, when you do database links, you need to process several PHP advanced programming learning notes for 2014.06

PHP object-oriented programming and design patterns (2 ). PHP advanced programming study notes this article discusses static keywords, which can be used in variables, classes, and methods. 1. static variables are variable PHP advanced programming study notes that only exist in the function scope This article discusses

that it is a solution to the problem and a simple solution to the complicated problem. This is just a macro description of him. Specifically, the design model is a reusable solution for software design issues in a certain environment. The purpose is to make full use of existing software development experience to solve different problems. During software developm

Original Author: Robert C. Martin Original article: http://www.objectmentor.com/resources/articles/Principles_and_Patterns.pdf Reference page: http://www.objectmentor.com/resources/publishedArticles.html Ii. Object-oriented Design Principles 1 The Open-Close principle (open and closed principle) A module shoshould be open for extension but closed for

I recently read the design model. I like this book very much, and the content is also very understandable. I am a little addicted to reading it. Haha, I first looked at the object-oriented basics. I have been familiar with object-oriented basics before, I have a further unde

PHP Advanced Programming Learning Note 2014.06.12 Namespaces Overview PHP supports namespaces at the beginning of the 5.3.0 version. What is a namespace? In a broad sense, namespaces are a way of encapsulating things. This abstract concept can be seen in many places. In PHP, namespaces are used to solve two types of problems encountered when writing a class library or application to create reusable code such as classes or functions: The PHP namespace

1. Conventional object creation methods: // Create a road objectRoad = new road ();New problem:-Implementation dependencies cannot cope with changes to the "Specific instantiation type. 2. Origin of the factory Model • The change point is "Object creation", so the "Object creation" is encapsulated" • Interface-oriente