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Zumba Fitness Workout DVD Set - DVDRip Tutorial

 

 

 

 

 

This is where you'll learn some things about the Zumba fitness system that you may or may not be aware of. Of all the many great ways there are to keep fit and healthy, dance is one of the more enjoyable. You can dance away an awful lot of calories especially when the dancing is energetic and involves a lot of exciting body movements.

 

 

<RayNbow> hmm... I was wondering... [] is an instance of the Monad class... would it be useful to make other collection types (for example, Data.Set) also an instance of the Monad class?

<Cale> RayNbow: If it were possible, Set would be an instance of Monad

<Cale> RayNbow: The problem is that in order to implement bind and/or return, you need an instance of Ord for your element type, which isn't guaranteed by either of those.

<Cale> :t (>>=)

<lambdabot> forall (m :: * -> *) a b. (Monad m) => m a -> (a -> m b) -> m b

<RayNbow> why would you need Ord?

<Cale> (nothing here says that a or b will have an instance of Ord)

<Cale> Because in order to build a Data.Set, which is really a binary tree structure, you need to have an ordering on the elements. That's how it gets its efficiency.