16.1 TimeAs another example of a user-defined type, we’ll define a class called Time that records the time of day. The class definition looks like this: class Time(object): """Represents the time of day. attributes: hour, minute, second &qu…

As another example of a user-defined type, we’ll define a class called Time that records the time of day. The class definition looks like this: Write a function print_time that takes a Time object and prints it in the form hour:minute:second. Write a…

前言:这篇继续来看看开闭原则.废话少说,直接入正题. 软件设计原则系列文章索引 C#软件设计——小话设计模式原则之:依赖倒置原则DIP C#软件设计——小话设计模式原则之:单一职责原则SRP C#软件设计——小话设计模式原则之:接口隔离原则ISP C#软件设计——小话设计模式原则之:开闭原则OCP 一.原理介绍 1.官方定义 开闭原则,英文缩写OCP,全称Open Closed Principle. 原始定义:Software entities (classes, modules, functi…

参考: 1. The Clean Architecture in Python (Brandon Rhodes) 2. Python Best Practice Patterns (Vladimir Keleshev) 3. Transforming Code into Beautiful, Idiomatic Python (Raymond Hettinger) 4. How to Write Resuable Code (Greg Ward) 5. How to write actually…

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…

Background C++ is one of the main development languages used by many of Google's open-source projects. As every C++ programmer knows, the language has many powerful features, but this power brings with it complexity, which in turn can make code more…

预备知识: 开放封闭原则(Open-Closed Principle OCP) Software entities(classes,modules,functions etc) should open for extension ,but close for modification. 所谓开放封闭原则就是软件实体应该对扩展开放,而对修改封闭.开放封闭原则是所有面向对象原则的核心. 软件设计本身所追求的目标就是封装变化,降低耦合,而开放封闭原则正是对这一目标的最直接体现. 对扩展开放,意味着有新…

简介 ReactJs由于有FB的支持,得到了社区的极大关注,同时由于ReactJs只希望专一的做好View层次上的工作,所以本身并没有涉及很多周边工具. 今天要介绍一款工具,同时包含一个构建项目模板的工具,对于初学者来说,就有了一个可以学习.开发.测试的平台. Yeoman 官方的介绍是这样形容的:“Web App的脚手架工具” --- Yeoman的目的是帮助用户更好的启动项目,提供最好的实践和工具使用户保持高生产率. Yeoman提供了一个生成器的生态系统,并提供了一个“Yeoman的工作流…

我们的动机(Our motivation) There are many PHP frameworks nowadays, but none of them is like Phalcon (Really, trust us on this one). Almost all programmers prefer to use a framework. This is primarily because it provides a lot of functionality that is alre…

Open Source Project for iOS 所有和iOS相关的Open Source Project的汇总. 功能点 开源项目   iOS Gallery RMGallery https://github.com/robotmedia/RMGallery FGallery https://github.com/gdavis/FGallery-iPhone KYElegantPhotoGallery https://github.com/KittenYang/KYElegantPhot…