Re: [Haskell-cafe] Reader monad, implicit parameters, or something else altogether?

On Fri, 22 Aug 2008, Alexander Dunlap wrote:

You can always change how you unsafePerformIO the data, though. If you want to set Planck's constant to 42 (or whatever), just change the unsafePerformIO $ <whatever> to unsafePerformIO $ return 42.

you can't change it at runtime