Reid Barton questions

Reid Barton answers

• Why are type instances (a->a) and (a->a->a) conflicting in GHC 7.8?
• Store and retrieve an object of some typeclass - is it possible? If yes, how?
• How do I create a Storable instance for this type?
• Trouble importing a C function into Haskell
• Use cases of 'signum' for ordered numeric types in Haskell
• GHC undefined reference to Paths in dependency
• Applicative instance for hypercuboid
• In Haskell how can I match a type class with an instance of that type class?
• catch violates the semantic approximation order?
• Getting value with a Lens s t a b