[Haskell-cafe] How the following works

Hello, I can hardly imagine how the following code works: cinits :: [a] -> [[a]] cinits [] = [[]] cinits (x:xs) = [] : map (x:) (cinits xs) can someone give me a good explaination? (I understand it a bit, but it's really hard for me to figure out how a map in a map function works.) Thank you for your time, Tsunkiet