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 ### Haskell
 
 * [Real World Haskell 中文版](http://rwh.readthedocs.org/en/latest/)
-* [Haskell趣学指南](http://fleurer-lee.com/lyah/)
+* [Haskell趣学指南](https://learnyoua.haskell.sg/content/zh-cn/)
 
 ### iOS