Isn't that the exact same thing you would do in Haskell? How you read from a config file in Haskell seems irrelevant here, and troubles with it are more related

Isn't that the exact same thing you would do in Haskell? How you read from a config file in Haskell seems irrelevant here, and troubles with it are more related to purity than composition. dropNTakeM p n m = take m . filter p . drop n