design patterns explained simply

in Gof's design patterns:elements of reusable object-oriented software, three classes (creation [abstraction of the instantiation process of a class], structural type [ Describes how to combine a class or object to form a larger structure], behavior [to divide responsibility between different objects and abstract the algorithm]) 23 design patterns, including: abs

Six principles of design patterns (6) -- six principles of open and closed Design Patterns Definition: The objects (classes, modules, functions, etc.) in the software should be open to extensions, but the modifications should be closed. Personal Understanding: In general, the open/closed principle refers to various com

PHP Design patterns, Design patterns A brief description of several modes: 1. Factory mode A factory pattern is a class that has some methods for creating objects for you. You can use the factory class to create objects without using new directly. This way, if you want to change the type of object you are creating, yo

" in 1989, So Google will simply search this article ~ Did not find the original, but found an article referencing the original: http://wiki.hsr.ch/Prog3/files/overload72-FINAL_DesigningHeaderFiles.pdf Cheshire Cat● A private “representation” class is written that embodies thesame functionality and interface as the naïve class – however,unlike the naïve version, this is defined and implementedentirely within the implementation file. The public inter

Http://topic.csdn.net/t/20040621/16/3110412.html Introduction: the online criticism of MFC is endless. It is not good to say that it is similar to MFC. Some netizens even use "bad" to describe MFC. I have been learning mf c for some time. I feel that my level of MFC is moderate, and there is still a gap between my skills in using it. I have a deep understanding of the "pain" of learning MFC, so I usually try to avoid using MFC at work. A few days ago, I saw a discussion about the

Design patterns can be divided into three types depending on the type of use:1. creation mode : Factory (Factory mode), Singleton (single State), Builder ((builder mode), Prototype (prototype mode), factory method mode.2. structure mode : Flyweight (Shared mode), Bridge (bridge mode), Decorator ((decorative mode), Composite ((combo mode), Adapter (adapter mode), Proxy (proxy mode), facade (appearance mode).

Six principles of design patterns (5)-the six principles of design patterns Definition: An object should have a minimum understanding of other objects. The dimit rule is also known as the minimum Knowledge rule. It is called the Least Knowledge Principle (LKP) in English. Personal Understanding: The primary objective

23 design patterns (21) java meta-mode and 23 Design Patterns Dr. Yan Hong's book "JAVA and patterns" describes the Flyweight mode as follows: In boxing, Flyweight refers to the most lightweight model, that is, "Fly magnitude" or "rainfall level". Here we use the free transl

Summary of design patterns in Objective-C, and objectivec Design Patterns This article summarizes the use of the design patterns listed in Gang of Four in Objective-C from five dimensions: name, definition, when to use, UML diagra

. Resulttextfield. Text= [NSString stringwithformat:@%f,[oper GetResult]];Through the refactoring of the simple Factory mode, we are idle the code structure of the low coupling degree, so that the external expansion open, the modification is closed. If you add any additional action methods, simply inherit the action method parent class, create a new action subclass, and add an else if to the simple factory class.AdvantagesThe simple factory method eli