Add flipped fmap

[Edward Kmett]

On Thu, Apr 8, 2010 at 3:38 PM, Isaac Dupree <ml at isaac.cedarswampstudios.org
> wrote:

> This parallelism also suggests to me that <$$> should be placed (only) in
> Control.Applicative, which is where <*>, <$>, and <**> reside.  Yeah, I know
> that's annoying...


<$> is defined or re-exported by both Data.Functor and Control.Applicative.
This parallel would probably suggest exporting it from both Data.Functor and
Control.Applicative, however.

-Edward Kmett
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