
13 Sep
2007
13 Sep
'07
12:44 p.m.
Hello,
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 []
Is there a reason for not having tailM :: Monad m => [a] -> m [a] which, at least for me, is much more useful? -Jeff --- This e-mail may contain confidential and/or privileged information. If you are not the intended recipient (or have received this e-mail in error) please notify the sender immediately and destroy this e-mail. Any unauthorized copying, disclosure or distribution of the material in this e-mail is strictly forbidden.