Finding index of element in a list in Haskell?

Question

I have a function in Haskell which finds the maximum value of an exponentiation from a list:

prob99 = maximum $ map (\\xs -> (head xs)^(head (tail xs))) n         


        

Answer 1

This probably doesn't deserve to be in an answer of his own, but I can't comment yet. Anyway, here is how I would have written this:

import Data.List
import Data.Ord

maxIndex ::  Ord a => [a] -> Int
maxIndex = fst . maximumBy (comparing snd) . zip [0..]