99 questions/Solutions/1

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Revision as of 15:16, 18 September 2012 by Luc4sdreyer (talk | contribs) (Added another answer: myLast''''')
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(*) 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)

myLast''''' [] = error "No end for empty lists!"  
myLast''''' x = x !! (length x -1)

The Prelude also provides the function last.