I'm trying to write the below function so that I can use it with a variable number of arguments to Text.Printf.printf. I tried using typeclasses but I couldn't find any example which wasn't process...

So, I'm trying to implement a polyvariadic ZipWithN as described here. Unfortunately, Paczesiowa's code seems to have been compiled with outdated versions of both ghc and HList, so in the process o...

I need a function which takes an arbitrary number of arguments (All of the same type), does something with them and afterwards gives a result back. A list of arguments is impracticable in my specif...

This answer demonstrates a polyvariadic function that sums its arguments: class SumRes r where sumOf :: Integer -> r instance SumRes Integer where sumOf = id instance (Integral a, SumRes r)...

Today I played with using type classes to inductively construct functions of a predicate of any arity taking as inputs any combination of any types, that returned other predicates of the same type ...

Possible Duplicate: Why is such a function definition not allowed in haskell? I'm a newcomer to the world of Haskell, migrating over from Lisp. I'm trying to adjust to Haskell's funda...

If I would like to write a method that takes a variable number of "TDerived" where TDerived is any subclass of a class "Base", is there any way to do this? The following code only works with a sin...

Haskell's type safety is second to none only to dependently-typed languages. But there is some deep magic going on with Text.Printf that seems rather type-wonky. > printf "%d\n" 3 3 > printf...

Is it possible to have a function that takes a foreign function call where some of the foreign function's arguments are CString and return a function that accepts String instead? Here's an example...

My current approach to define a function of arbitrary arity is below, with A being an accumulator, E being the input argument type, and R being the result type. combine :: A -> E -> A class...

After reading this article on writing polyvariadic functions in Haskell, I tried to write some of my own. At first I thought I'd try to generalize it - so I could have a function that returned var...