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@ -12,11 +12,3 @@ NoError :: Int -> MaybeInt
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> :t Error
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Error :: String -> MaybeInt
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\end{haskellcode}
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\pause
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And now we can do sanity checks:
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\begin{haskellcode}
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calcSomething :: Int -> MaybeInt
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calcSomething x
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| x < 100 = NoError (x * 5)
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| otherwise = Error "Int out of range!"
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\end{haskellcode}
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@ -1,3 +1,11 @@
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And now we can do sanity checks:
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\begin{haskellcode}
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calcSomething :: Int -> MaybeInt
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calcSomething x
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| x < 100 = NoError (x * 5)
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| otherwise = Error "Int out of range!"
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\end{haskellcode}
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\pause
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And pattern match on it as well:
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\begin{haskellcode}
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addIntToList :: MaybeInt -> [Int]
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