Incipit.List

Variants of the uncons and unsnoc combinators for lists that return Maybe.

Documentation

head :: [a] -> Maybe a

Return Just the head of a list.

last :: [a] -> Maybe a

Return Just the last element of a list.

init :: [a] -> Maybe [a]

Return Just the non-last elements of a list.

tail :: [a] -> Maybe [a]

Return Just the non-head elements of a list.