Re: [Haskell-cafe] What is the meaning of tilde ("~") symbol

On 14 February 2010 22:11, Evan Laforge wrote:

There's still no consensus on typeclasses for collections, so these are all separate functions.  Has anyone taken a shot at a set of AT-using classes for the standard collections?

The standard collections have different shapes depending on what they represent (maps, trees, lists, sequences) so considering Functor, Traversable, Foldable perhaps the common operations are largely already covered. A unifying 'collection' class might be as problematic as good old Num is for numbers... Best wishes Stephen