Python Learning Paths Python Expert Python in Action Syntax Python objects Scalar types Operators String I/O Functions Python modules Collections Python best practices Compare Python implementations Differentiate between computations using operators…

''' 在程序运行的过程中,如果发生了错误,可以事先约定返回一个错误代码,这样,就可以知道是否有错,以及出错的原因.在操作系统提供的调用中,返回错误码非常常见.比如打开文件的函数open(),成功时返回文件描述符(就是一个整数),出错时返回-1. 用错误码来表示是否出错十分不便,因为函数本身应该返回的正常结果和错误码混在一起,造成调用者必须用大量的代码来判断是否出错 ''' # Exception # 高级语言通常都内置了一套try...except...finally...的错误处理机制,Py…

TypeScript Learning Paths TypeScript Expert refs xgqfrms 2012-2020 www.cnblogs.com 发布文章使用:只允许注册用户才可以访问!…

Angular Learning Paths Angular Expert refs https://app.pluralsight.com/search/?q=angular xgqfrms 2012-2020 www.cnblogs.com 发布文章使用:只允许注册用户才可以访问!…

Vue Learning Paths Vue Expert refs https://vueschool.io/articles/vuejs-tutorials/exciting-new-features-in-vue-3/ https://vuejsdevelopers.com/2020/03/16/vue-js-tutorial/ https://www.vuemastery.com/blog/top-ways-to-learn-Vue-3/ xgqfrms 2012-2020 www.cn…

CSS Learning Paths CSS Expert refs https://developer.mozilla.org/en-US/docs/Web/CSS https://css-tricks.com/ xgqfrms 2012-2020 www.cnblogs.com 发布文章使用:只允许注册用户才可以访问!…

HTML5 Learning Paths HTML5 Expert refs https://developer.mozilla.org/en-US/docs/Web/HTML xgqfrms 2012-2020 www.cnblogs.com 发布文章使用:只允许注册用户才可以访问!…

JavaScript Learning Paths(ES5/ES6/ES-Next) JavaScript Expert refs https://developer.mozilla.org/en-US/docs/Web/JavaScript xgqfrms 2012-2020 www.cnblogs.com 发布文章使用:只允许注册用户才可以访问!…

React Learning Paths React Expert React in Action The assessment may cover: Components Events and Binding Forms JSX Lifecycle Performance Props State Styling Testing refs official docs https://reactjs.org/docs/react-component.html https://www.plurals…

Node.js Learning Paths Node.js in Action Node.js Expert situations / scenario Restful API OAuth 2.0 & SSO IM & WebSocket CURD MongoDB / CURD MySQL MEAN stack SSR server tools image upload / gzip pdf export share screen shortcuts GraphQL server CLI…