[Haskell-cafe] Function composition confusion

[Anuj Seth]

Hi,
Excuse the newbie'ness of my question.
Saw an example in Two Dozen Questions by Rexx Page.

blocks blockSize =
    takeWhile ( not . null ) . map fst .
              iterate (splitAt blockSize . snd) . splitAt blockSize

What is the meaning of the . operators outside the parentheses ?
Thsi does not look like function composition to me.

Thanks,
Anuj.

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