On 8 May 2010, at 17:09, Ozgur Akgun wrote:

I might have misunderstood you, but what about using the existing interact function: http://haskell.org/ghc/docs/6.12.1/html/libraries/base-4.2.0.0/Prelude.html#v:interact

And for your interact, since it is not in the IO monad, you cannot write such a function. [ don't tell him about the unsafePerformIO :) ]

Uh, interact absolutely *is* in the IO monad, and is totally implementable without unsafePerformIO, like this:

interact f = putStr =<< f <$> getContents

Bob