Re: Proposal: more general unionWith for Data.Map

Hi Johan,

On Tue, Jan 24, 2012 at 11:42 AM, Christian Sattler wrote:

...

I don't care much about the naming, but note that the analogous property already fails for the generalized intersectionWithKey in the development version.

I suspected as much. I think the current intersectionWithKey is broken. We should have a single function, mergeWithKey, that allows people to do the things they currently do using Maybe return values in e.g. intersectionWithKey.

Funnily, I just also used mergeWithKey for the "ultimate combining function" in this thread :) FYI, the new intersectionWithKey is not released yet -- maybe we could leave intersectionWithKey as it is, and provide mergeWith[Key] instead. Opinions? Cheers, Milan