Youtube Channels for programmers

Best Youtube Channels for Self-taught developers Code Train: https://www.youtube.com/user/shiffman  Traversy Media: https://www.youtube.com/user/TechGuyWeb Derek Banas: https://www.youtube.com/user/derekbanas  LearnCode.academy: https://www.youtube.com/user/learncodeacademy  LevelUpTuts: https://www.youtube.com/user/LevelUpTuts  Academind: https://www.youtube.com/channel/UCSJbGtTlrDami-tDGPUV9-w/featured  

React.JS Introduction 01

React Js browser include // React Core library <script crossorigin src=”https://unpkg.com/react@16/umd/react.production.min.js”></script> // React dom library <script crossoriginsrc=”https://unpkg.com/react-dom@16/umd/react-dom.production.min.js”></script> // Convert ES6 to ES5 <script src=”https://unpkg.com/babel-standalone@6/babel.min.js”></script> JS…

Liferay 7 – javax.servlet.ServletException: java.lang.NoClassDefFoundError

If you run into this issue, how to solve it? 2018-07-09 21:44:54.986 ERROR [http-nio-8443-exec-2][status_jsp:911] com.liferay.portal.kernel.portlet.PortletContainerException: com.liferay.portal.kernel.portlet.PortletContainerException: javax.servlet.ServletException: java.lang.NoClassDefFoundError: com/liferay/docs/guestbook/model/Guestbook 2018-07-09 21:44:55.030 ERROR [liferay/monitoring-1][ParallelDestination:55] Unable to…