99 questions/Solutions/1

From HaskellWiki
< 99 questions‎ | Solutions
Revision as of 00:21, 26 July 2012 by Helq (talk | contribs)
Jump to navigation Jump to search

(*) Find the last element of a list.

myLast :: [a] -> a
myLast [x] = x
myLast (_:xs) = myLast xs

myLast' = foldr1 (const id)

-- Prelude> const 1 2
-- 1
-- Prelude> (flip const) 1 2
-- 2
myLast'' = foldr1 (flip const)

myLast''' = head . reverse

myLast'''' = foldl1 (curry snd)

The Prelude also provides the function last.