Re: [Haskell-cafe] advantages of using fix to define rcursive functions

harald.rotter:

Hi,

I read about the usage of "fix" to define recursive functions. Although I think that I understood how to use "fix", I still wonder what the advantages of "fix" are (as compared to the "conventional" approach to define recursive functions).

Any hints are appreciated.

There's no obvious advantage that I know of, other than being cute. An example from xmonad: allocaXEvent $ \p -> fix $ \again -> do more <- checkMaskEvent d enterWindowMask p when more again So actually, I suppose it is useful for small, anonymous recursive definitions. -- Don