Error messages monad reader added

10 years ago · 7301c93803
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@ -70,6 +70,10 @@ You don't need this if you use the .app, but if it doesn't work for you, try thi

 http://www.seas.upenn.edu/~cis194/lectures.html Brent Yorgey's course is the best I've found so far and replaces both Yann Esposito's HF&H and the NICTA course. This course is particularly valuable as it will not only equip you to write Haskell but also help you understand parser combinators. 

+## Understanding basic Haskell error messages
+
+- http://ics.p.lodz.pl/~stolarek/_media/pl:research:stolarek_understanding_basic_haskell_error_messages.pdf
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 ## Supplementary course that provides more material on intermediate topics

 This is Bryan O'Sullivan's online course from the class he teaches at Stanford. If you don't know who he is, take a gander at half the libraries any Haskell application ends up needing and his name is on it. Of particular note if you've already done the Yorgey course are the modules on phantom types, information flow control, language extensions, concurrency, pipes, and lenses.