2009/10/21 michael rice <nowg...@yahoo.com> > > There's a thread on the plt-scheme list about creating a function of NO > arguments named NEXT that just returns the number of times it's been called, > a piece of cake in Scheme, but how would one do this in Haskell? Would the > best approach be to use a State monad?
If you really want no argument, not just syntactically in the do notation, you need ST or IO. Furthermore, you need ST or IO to allocate a mutable variable that is accessible only to the next function. Cheers, Thu _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
