[Scala] learning summary

This article is a summary of top learning Scala article, only to find personal convenience

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 Various symbols mean　　https://blog.csdn.net/datadev_sh/article/details/79854273

 

Exception handling　　https://www.cnblogs.com/guangluwutu/p/10966604.html

 

Some keywords and no statement　　https://www.cnblogs.com/guangluwutu/p/10966738.html