Re: No way to retrieve the base of a Set or Map in O(1)

Hello,

do you have any use-case where such function is useful?

I am trying to generalize some combinatorial functions to a class of types containing any sort of element. For many combinatorial functions it is useful to split the elements at some element and recombine them after a recursion over the parts. That's what I was thinking of. But others seem to be interested aswell (although it is a beginner asking, so there might be a better solution to his problem): http://osdir.com/ml/beginners@haskell.org/2015-03/msg00091.html Kind regards, André