Re: [Haskell-cafe] Re: Is "take" behaving correctly?

* Neil Mitchell wrote:

There are 4 variants of tail:

tail :: [a] -> [a] -- normal tailDef :: [a] -> [a] -> [a] -- returns the first argument on [] tailMay :: [a] -> Maybe [a] -- returns a Nothing tailNote :: String -> [a] -> [a] -- crashes, but with a helpful message tailSafe :: [a] -> [a] -- returns [] on []

From the logical point of view tailMay is the right one. It pushes the error handling to the caller programm.

tail = fromJust . tailMay