A supplement to the talk for introduction to Haskell at Open Source Conference 2007

1. ikegami@madscientist.jp
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10. a = 10 a = 10 a = 10
b = 20 b = 20 b = 20
c = 30 c = 30 c = 30
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12. a=b+c a=b+c
where where
b=2 { b = 2;
c=3 c = 3; }
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30. main :: IO ()
main = mapM_ (putStrLn . fizzBuzz) [1..]
fizzBuzz :: Integer -> String
fizzBuzz x
| x `mod` 15 == 0 = quot;FizzBuzzquot;
| x `mod` 3 == 0 = quot;Fizzquot;
| x `mod` 5 == 0 = quot;Buzzquot;
| otherwise = show x
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32. unsafePerformIO
import System.IO.Unsafe
unsafePerformIO :: IO a -> a
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33. unsafePerformIO
import Data.Generics
cast :: (Typeable a, Typeable b)
=> a -> Maybe b
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34. Haskell FFI
FFI = Foreign Function Interface
import Foreign
data CChar
data CInt
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35. Windows API
import System.Win32
hKEY_CURRENT_USER :: HKEY
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36. Dons’ eval
http://www.cse.unsw.edu.au/~dons/hs-plugins/
eval :: Typeable a => String ->
[Import] -> IO (Maybe a)
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