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yangsu/haskell-maybe-ex.hs

Created April 23, 2013 20:39
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Haskell Maybe Example
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haskell-maybe-ex.hs
Prelude> return "WHAT" :: Maybe String
Just "WHAT"
Prelude> Just 9 >>= \x -> return (x*10)
Just 90
Prelude> Nothing >>= \x -> return (x*10)
Nothing
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