Guillaume Chérel questions

• Getting value with a Lens s t a b
• What are the differences between `evaluate`, `rwhnf` and `seq` and their "deep" counterparts?
• Complete minimal example for using quickCheckAll
• hierarchical data types
• extern functions in haskell?
• multiple use of ++: more efficient if I force the evaluation from right to left?
• Why isn't the state monad traversable?
• Is there a "there exists" quantifier in QuickCheck?
• Is there a total alternative to the `read` function?

Guillaume Chérel answers