Rumca questions

• How to reduce boilerplate dealing with Maybe and lists?
• Why does vim hide wrapped lines and prints multiple @s?
• How to avoid checking for empty value in Haskell?
• XMonad classic alt tab
• How to get simpler but equivalent version of a Haskell expression
• How to implement Haskell equivalent of invokeAll
• Why some functions are not visible in hoogle?
• Are there any Haskell specific tools that can show source code from imported modules?
• How to do complex IO processing and implicit cache in Haskell?
• Code instrumentation in haskell

Rumca answers