Chris Angelico <ros...@gmail.com>: > I think, it is patently false to claim that Haskell is purely > functional - but the I/O monads are a crucial feature in making the > language useful.
As soon as you accept that values can exist in "a superposition," that is, in a not-yet-fully-materialized form, you can see that functionality is not broken. Similarly you can imagine a function that returns the exact decimal representation of π; the function returns its value, which is printed on your screen by the REPL. Digits start whizzing by well before the function has completed its computation. No side effects needed, but digit ordering is, of course, crucial. Marko -- https://mail.python.org/mailman/listinfo/python-list