The SOLID principles The SOLID principles of Object Oriented Design include these five principles: SRP – Single Responsibility Principle OCP – Open/Closed Principle LSP – Liskov Substitution Principle ISP – Interface Segregation Principle DIP – Depen…

Intention: more understandable, easier to maintain and easier to extend.(通过良好的设计使得代码easy and simple,从而实现将复杂的事情简单化) S — Single responsibility principle every module or class should have responsibility over a single part of the functionality provided b…

SOLID 是面向对象设计5大重要原则的首字母缩写,当我们设计类和模块时,遵守 SOLID 原则可以让软件更加健壮和稳定.那么,什么是 SOLID 原则呢?本篇文章我将谈谈 SOLID 原则在软件开发中的具体使用. 单一职责原则(SRP) 单一职责原则(SRP)表明一个类有且只有一个职责.一个类就像容器一样,它能添加任意数量的属性.方法等.然而,如果你试图让一个类实现太多,很快这个类就会变得笨重.任意小的改变都将导致这个单一类的变化.当你改了这个类,你将需要重新测试一遍.如果你遵守 SRP,你的…

原文:SOLID Principles every Developer Should Know – Bits and Pieces SOLID Principles every devloper should know 面向对象为软件开发带来了新的设计方式,它使得开发者可以将具有相同目的或功能的数据结组合到一个类中来完成单一的目的,不需要考虑整个应用. 但是,面向对象编程没有减少混乱和不可维护的程序.正是这样,Robert C. Martin发展出了5条指南/准则,让开发者可以易于创建可读且易于…

OOP & SOLID Implementing DDD highly relies on the Object Oriented Programming (OOP) and SOLID principles. Actually, it implements and extends these principles. So, a good understanding of OOP & SOLID helps you a lot while truly implementing the DD…

在面向对象的设计中有很多流行的思想,比如说 "所有的成员变量都应该设置为私有(Private)","要避免使用全局变量(Global Variables)","使用运行时类型识别(RTTI:Run Time Type Identification,例如 dynamic_cast)是危险的" 等等.那么,这些思想的源泉是什么?为什么它们要这样定义?这些思想总是正确的吗?本篇文章将介绍这些思想的基础:开放封闭原则(Open Closed Princi…

接口分离原则(Interface Segregation Principle)用于处理胖接口(fat interface)所带来的问题.如果类的接口定义暴露了过多的行为,则说明这个类的接口定义内聚程度不够好.换句话说,类的接口可以被分解为多组功能函数的组合,每一组都服务于不同的客户类,而不同的客户类可以选择使用不同的功能分组. ISP 原则承认了对象设计中非内聚接口的存在.但它建议客户类不应该只通过一个单独的类来使用这些接口.取而代之的是,客户类应该通过不同的抽象基类来使用那些内聚的接口.在不同…

很多软件工程师都多少在处理 "Bad Design"时有一些痛苦的经历.如果发现这些 "Bad Design" 的始作俑者就是我们自己时,那感觉就更糟糕了.那么,到底是什么让我做出一个能称为 "Bad Design" 的设计呢? 绝大多数软件工程师不会在设计之初就打算设计一个 "Bad Design".许多软件也在不断地演化中逐渐地降级到了一个点,而从这个点开始,有人开始说这个设计已经腐烂到一定程度了.为什么会发生这些事情呢?…

开放封闭原则(Open Closed Principle)是构建可维护性和可重用性代码的基础.它强调设计良好的代码可以不通过修改而扩展,新的功能通过添加新的代码来实现,而不需要更改已有的可工作的代码.抽象(Abstraction)和多态(Polymorphism)是实现这一原则的主要机制,而继承(Inheritance)则是实现抽象和多态的主要方法. 那么是什么设计规则在保证对继承的使用呢?优秀的继承层级设计都有哪些特征呢?是什么在诱使我们构建了不符合开放封闭原则的层级结构呢?这些就是本篇文章将…

单一职责原则(SRP:The Single Responsibility Principle) 一个类应该有且只有一个变化的原因. There should never be more than one reason for a class to change. 为什么将不同的职责分离到单独的类中是如此的重要呢? 因为每一个职责都是一个变化的中心.当需求变化时,这个变化将通过更改职责相关的类来体现. 如果一个类拥有多于一个的职责,则这些职责就耦合到在了一起,那么就会有多于一个原因来导致这个类的变…

VS2013: upgrading a Windows Phone 7/8 and Windows 8 apps September 17, 2013Windows 8, Windows PhoneJeremy In this post I will showcase issues I had while upgrading a Visual Studio 2012 solution containing a Windows Phone app (with both 7.8 and 8.0 ve…

Web How to do distributed locking Writing Next Generation Reusable JavaScript Modules in ECMAScript 6 Essential Tools for Building SPAs with AngularJS Setting up a TypeScript + Visual Studio Code development environment The Basics of Web Application…

I stumbled upon the following two articles First and Second in which the author states in summary that ORM Entities and Domain Entities shouldn't be mixed up. I faced exactly this problem at the moment as I code with EF 6.0 following the Code First a…

参考:http://viralpatel.net/blogs/angularjs-service-factory-tutorial/ https://www.pluralsight.com/blog/tutorials/angularjs-step-by-step-services 想法:定义一个 angular module 之后呢, 在许多的 controller 中会有一些公共的函数,或者是说在很多controller 中都要使用到的共同的方法,类似的逻辑其实是可以提取出来,进行封装. 这…

You’ve probably heard of the acronym SOLID by now, which is an object oriented programming paradigm consisting of five basic (but interrelated principles) of object oriented development. And you’ve probably heard once or twice that the D in SOLID sta…

How I explained OOD to my wife Learning Object Oriented Design principles through interesting conversations. Introduction My wife Farhana wants to resume her career as a software developer (she started her career as a software developer, but couldn't…

Introduction 介绍Chapter 1 outlines how you can address some of the most common requirements in enterprise applications by adopting a loosely coupled design to minimize the dependencies between the different parts of your application. However, if a cla…

Before you learn about dependency injection and Unity, you need to understand why you should use them. And in order to understand why you should use them, you should understand what types of problems dependency injection and Unity are designed to hel…

具体见:https://github.com/thangchung/awesome-dotnet-core 半年前看到的,今天又看到了,记录下. 框架类: ZKWeb ABP General ASP.NET Core Documentation - The official ASP.NET Core documentation site. .NET Core Documentation - Home of the technical documentation for .NET Core, C#…

1. github https://githuber.cn/search?language=Objective-C https://www.jianshu.com/u/815d10a4bdce https://blog.csdn.net/hello_hwc https://blog.ibireme.com/2015/05/18/runloop/ https://www.jianshu.com/p/64e33f9bdc03 https://github.com/zhouhuanqiang/Lear…

SOLID Principles Reference 1. Single Responsibility http://en.wikipedia.org/wiki/Single_responsibility_principle (ToRead) 2. Open/Closed http://en.wikipedia.org/wiki/Open/closed_principle 3. Liskov Substitution http://en.wikipedia.org/wiki/Liskov_sub…

Considerations Source codes Contributors Contact ASP.NET Boilerplate is designed to help us to develop applications using best practices without repeating ourselves. DRY - Don't Repeat Yourself! is the key idea behind ASP.NET Boilerplate. ASP.NET样板的设…

Checklist1. Make sure that there shouldn't be any project warnings.2. It will be much better if Code Analysis is performed on a project (with all Microsoft Rules enabled)and then remove the warnings.3. All unused usings need to be removed. Code clean…

可以用composer的autoload来,导入自己写的类库.   composer dump-autoload -o  ----------------> 改成 composer update 也可以. 怎么使用co'mposer呢? 1.composer.json 2. index.php 3. 执行 php index.php ---------------------------------------------------------------------------------…

Introduction Me and my wife had some interesting conversations on Object Oriented Design principles. After publishing the conversation on CodeProject, I got some good responses from the community and that really inspired me. So, I am happy to share o…

Introduction My wife Farhana wants to resume her career as a software developer (she started her career as a software developer, but couldn't proceed much because of our first child's birth), and these days, I am trying to help her learn Object Orien…

By Steve Smith  June 23, 2015 ASP.NET 5 differs from previous versions of ASP.NET in many ways. Gone is the default ASP.NET event life cycle, and along with it, the global.asax file (which itself was an evolved version of global.asa from the ASP days…

北风设计模式课程---接口分离原则(Interface Segregation Principle) 一.总结 一句话总结: 接口分离原则描述为 "客户类不应被强迫依赖那些它们不需要的接口". 接口不是为特定的客户类服务,而服务了多个不同的客户类. 1.接口分离原则(Interface Segregation Principle)用来解决什么问题? 用于处理胖接口(fat interface)所带来的问题:如果类的接口定义暴露了过多的行为,则说明这个类的接口定义内聚程度不够好.换句话说…

北风设计模式课程---里氏替换原则(Liskov Substitution Principle) 一.总结 一句话总结: 当衍生类能够完全替代它们的基类时:(Liskov Substitution Principle)则是实现 OCP 原则的重要方式.只有当衍生类能够完全替代它们的基类时,使用基类的函数才能够被安全的重用,然后衍生类也可以被放心的修改了. 1.违背 LSP 原则的一个简单示例(这样设计的不好之处是什么)? |||-begin 一个非常明显地违背 LSP原则的示例就是使用 RTTI…

北风设计模式课程---依赖倒置原则(Dependency Inversion Principle) 一.总结 一句话总结: 面向对象技术的根基:依赖倒置原则(Dependency Inversion Principle)是很多面向对象技术的根基.它特别适合应用于构建可复用的软件框架,其对于构建弹性地易于变化的代码也特别重要.并且,因为抽象和细节已经彼此隔离,代码也变得更易维护. 1.软件设计中的"Bad Design" ? 1.影响多部分:难以修改,因为每次修改都影响系统中的多个部分.…