On Tue, 2009-03-24 at 23:15 +0100, Manlio Perillo wrote:
Dan Piponi ha scritto:
Miguel Mitrofanov wrote:
takeList = evalState . mapM (State . splitAt)
However, ironically, I stopped using them for pretty much the same reason that Manlio is saying.
Are you saying there's a problem with this implementation? It's the only one I could just read immediately.
Yes, you understand it immediately once you know what a state monad is. But how well is introduced, explained and emphasized the state monad in current textbooks?
When I started learning Haskell, the first thing I learned was recursion and pattern matching.
You know, this might actually need to be looked into. You need to know recursion and pattern-matching to *write* re-usable higher-order functions, but how appropriate is that as the first thing taught? jcc