Applying a function to an arbitrarily long list of arguments

Posted by alphomega on Stack Overflow See other posts from Stack Overflow or by alphomega
Published on 2010-05-10T03:50:38Z Indexed on 2010/05/10 3:58 UTC
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I want to create a function apply that takes a function with an arbitrary amount of arguments as well as a list of integers, and returns the result of the function (Where each integer in the list is an argument in order.

I was thinking something like:

apply :: ([Int] -> Int) -> [Int] -> Int
apply f x:xs = apply (f x) xs
apply f [] = f

But I know this won't work because the type signature is wrong - the function doesn't take a list of ints, it just takes some amount of int arguments.

Additionally, when I get to the base case the f argument to apply should actually be an integer, violating the type signature anyway.

Does anyone know how to deal with this sort of problem?

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