Difference between revisions of "99 questions/Solutions/1"
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myLast' = foldr1 (const id) |
myLast' = foldr1 (const id) |
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| + | -- Prelude> const 1 2 |
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| ⚫ | |||
| + | -- 1 |
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| + | -- Prelude> (flip const) 1 2 |
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| + | -- 2 |
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| + | myLast'' = foldr1 (flip const) |
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| + | |||
| ⚫ | |||
</haskell> |
</haskell> |
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Revision as of 06:54, 8 October 2011
(*) 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
The Prelude also provides the function last.