Longest Word in Haskell

Welcome to the Longest Word in Haskell page! Here, you'll find the source code for this program as well as a description of how the program works.

Current Solution

module Main where

import System.Environment
import Data.Function ((&))

usage :: String
usage = "Usage: please provide a string"

headMaybe :: [a] -> Maybe a
headMaybe []     = Nothing
headMaybe (x:xs) = Just x

verifyStringNotEmpty :: String -> Maybe String
verifyStringNotEmpty "" = Nothing
verifyStringNotEmpty xs = Just xs

main :: IO ()
main = do 
  args <- getArgs
  let inputStr = headMaybe args >>= verifyStringNotEmpty
  case inputStr of
    Just str -> str & words & map length & maximum & print
    Nothing  -> putStrLn "Usage: please provide a string"

Longest Word in Haskell was written by:

• Ricardo Mapurunga Junior

If you see anything you'd like to change or update, please consider contributing.

How to Implement the Solution

No 'How to Implement the Solution' section available. Please consider contributing.

How to Run the Solution

No 'How to Run the Solution' section available. Please consider contributing.