On Sun, 16 Sep 2007 09:12:56 -0700, Paul Rubin wrote: > Steven D'Aprano <[EMAIL PROTECTED]> writes: >> > What do you mean by Haskell is a dynamic language? It is statically >> > and strict typed and the compiler usually knows all the functions. >> > No "surprises", no side effects, no duck typing. >> >> Haskell's IO monad (and possibly the do monad?) allows side effects. It >> would be a pretty poor programming language that didn't allow input or >> output! > > In a certain theoretical sense, input and output in the IO monad are not > side effects.
Nevertheless, the authors of the paper listed below say they use the IO monad to get mutable objects and therefore side effects. >> See also http://homepages.cwi.nl/~ralf/OOHaskell/ showing that Haskell >> can do object-oriented programming, complete with mutable objects and >> side-effects. Although "duck typing" is listed as a keyword, I couldn't >> see any reference to it in the paper. > > That describes an OO extension to Haskell, which I suppose is > interesting, but it's not Haskell. Built entirely from standard Haskell98. Saying that it isn't Haskell is a little like saying that Python plus the Sets module isn't Python anymore. -- Steven. -- http://mail.python.org/mailman/listinfo/python-list
