[Haskell-cafe] Re: Beginner: IORef constructor?

Bernie Pope wrote:

If you want a global variable then you can use something like:

import System.IO.Unsafe (unsafePerformIO)

global = unsafePerformIO (newIORef [])

But this is often regarded as bad programming style (depends who you talk to).

Besides, isn't this example /really/ unsafe? I thought, at least the IORef has to be monomorphic or else type safety is lost? Cheers Ben