Proposal: add full complement of support for decreasing things in Data.Map

[Nickolay Kudasov]

Hi David,

Can't this be done simply by using Data.Ord.Down wrapper for the keys?

Kind regards,
Nick

On Thu, 19 May 2016 at 17:00 David Feuer <david.feuer at gmail.com> wrote:

> Data.Map offers functions to convert from ascending lists to maps, and
> also offers a function to map an increasing function over the keys of a
> map. Equivalents for descending lists and decreasing functions are missing.
> I think we should add them. Any objections?
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