Difference between revisions of "99 questions/Solutions/1"

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m
Line 15: Line 15:
   
 
myLast''' = head . reverse
 
myLast''' = head . reverse
  +
  +
myLast'''' = foldl1 (curry snd)
 
</haskell>
 
</haskell>
   

Revision as of 00:21, 26 July 2012

(*) 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.