It's function composition.

(.) :: (b -> c) -> (a -> b) -> (a -> c)

E.G. putStrLn . show $ 42

-R. Kyle Murphy
Sent from my phone.

On Feb 18, 2012 2:34 PM, "bahadýr altan" <doaltan@yahoo.co.uk> wrote:
Hello. I saw the dot "." operator in some Haskell codes, but I couldn't figure out what it does. I didn't see it in some books and tutorials and couldn't find an explanation on the Internet. Could you tell me what it does?

Thanks:)

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