Re: [Haskell-cafe] Symmetric Difference for Data.Set and Data.IntSet?

On Sun, Jul 5, 2015 at 6:33 PM, Ben Franksen wrote:

Zemyla wrote:

...

Could this be implemented as a primitive? I know it can be made from union and difference, or doing toList on both of them, taking the symmetric difference, and using fromDistinctAscList on the result, but it'd probably be much faster if it could be done natively, like can be done with Data.Map.mergeWithKey.

+1

I'm also very +1. -- Live well, ~wren