haskellHQ questions

• Heterogenous sized vectors where the types "work elsewhere"
• How can Integer have an instance of Enum? toEnum and fromEnum only use Int, which is limited
• Why is guard based on Alternative?
• Will ghc-options of an executable override ghc-options of linked libraries?
• Are there better ways to do Map k [v] -> Maybe (Map k v)?
• What is AllowAmbiguousTypes and why is it needed in this "forall" example?
• Type mysteries. Why does this code compile?

haskellHQ answers