Dernier élément de la liste Haskell
list = [1, 2, 3, 4]
last [a] -> a
last [x] = x
last (_:xs) = last xs
last list -- 4
Hippo_error
list = [1, 2, 3, 4]
last [a] -> a
last [x] = x
last (_:xs) = last xs
last list -- 4list = [1,2,3,4,5]
last list -- returns 5list = [1, 2, 3, 4]
tail :: [a] -> [a]
tail [] = []
tail (_:xs) = xs