比较路由中有无switch的区别: 代码一: <Router history={history}> <Route exact path="/" component={Login}/> <Route path="/home" component={Home}/> </Router> 如果URL是"/", 那么<Home>将都被渲染,因为它们的path全都被匹配到 代码二: <Rout…

在使用 Vue 或者 Angular 的时候,框架提供了路由守卫功能,用来在进入某个路有前进行一些校验工作,如果校验失败,就跳转到 404 或者登陆页面,比如 Vue 中的 beforeEnter 函数: ... router.beforeEach(async(to, from, next) => { const toPath = to.path; const fromPath = from.path; }) ... 在之前的版本中,React Router 也提供了类似的 onEnter 钩子…

前言:以下内容基于React全家桶+AntD实战课程的学习实践过程记录.最终成果github地址:https://github.com/66Web/react-antd-manager,欢迎star. 一.React Router 4.0核心概念 4.0版本中已不需要路由配置,一切皆组件 react-router:基础路由包 提供了一些router的核心api,包括Router,Route,Switch等 react-router-dom:基于浏览器的路由(包含react-router) 提供了…

Routes are some times better served as a modal. If you have a modal (like a login modal) that needs to be routeable and appear on all pages you may need to use query params. Will explore how to render a route all the time and use query params to cont…

[it-ebooks]电子书列表   [2014]: Learning Objective-C by Developing iPhone Games || Leverage Xcode and Objective-C to develop iPhone games http://it-ebooks.info/book/3544/Learning Web App Development || Build Quickly with Proven JavaScript Techniques http:…

What is OpenFlow? OpenFlow is an open standard that enables researchers to run experimental protocols in the campus networks we use every day. OpenFlow is added as a feature to commercial Ethernet switches, routers and wireless access points – and pr…

http://www.onjava.com/pub/a/onjava/2001/05/30/optimization.htmlComparing the performance of LinkedLists and ArrayLists (and Vectors) (Page last updated May 2001, Added 2001-06-18, Author Jack Shirazi, Publisher OnJava). Tips: ArrayList is faster than…

Network Connectivity 1. Important terminologies 1) Link 设备连接的连线.Link本身既可以是有线的,也可以是无线的. 2) Node 设备.电脑,笔记本电脑,手机都可以是Node. 3) Point-to-point 连接的设备只有两个. 4) Multiple access 连接的设备两个以上.多个设备同时去存取的这样一个Link. 5) Switched Network -> Circuit Switched 通讯之前线路必须建立起来.…

Learning Puppet — Resources and the RAL Welcome to Learning Puppet! This series covers the basics of writing Puppet code Begin Log into the Learning Puppet VM as root, and run puppet resource service. This command will return something like the follo…

思科IOS有2种主要命令行模式:用户模式与特权模式 1.用户模式(user mode),当用“>”表示实在用户模式下 2.特权模式(exec mode),当用"#"表示是在特权模式下 3.在不同模式下切换的相关命令 用户模式 与 特权模式相互间的切换(注意提示符的变化) Router>enable (在命令行模式下默认是用户模式,用enable切换至特权模式) Router# (注意提示符的变化) Router#disable (从特权模式退出到用户模式) Router&g…