各种语言基础知识的汇总 新手教程 百科全书(Summary of the basic knowledge of various languages)

w3cschool菜鸟教程，可以用于方便查找代码和方法，非常好用，希望收藏(W3cschool rookie tutorials, can be used to find codes and methods conveniently, and is very easy to use, hoping to collect.)