Random fact: Data.Map.insertWith' exists. Data.IntMap.insertWith' does *not*
exist.
The containers library is a mess.
I'm inclined to agree.
In particular, I get strange looks from people in the OOP community when
I say I'm using a language that doesn't have any abstractions at all for
dealing polymorphically with containers. In general, it's almost
impossible to write a Haskell function that will work with a list, an
(immutable) array, a hash table or a map, polymorphically.
I guess it's the case that containers has been there so long now that
changing it would break everything. Still, I find myself hungry for
something better.
Than again, the Prelude itself leaves several things to be desired...
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