chi questions

chi answers

• Replace keys in Data.Map
• How to avoid writing trivial data type check functions
• Functional object-oriented programming in Haskell
• Is there a way in haskell to compactly and efficiently compare by multiple parameters and in different orders
• Can I discharge a constraint, if I know the class is solvable for all types of a kind?
• Does indexing a mapped/filtered infinite list apply the map/filter function to all the elements before the index?
• Can a polymorphic constant be mapped over a list of *types*?
• Foldl vs Foldr memory usage
• Phantom Types in Haskell
• Why there is no output for wrapped IO in Haskell?