Is there a common name for this function. I think of it as double map. fn :: (a -> b) -> [[a]] -> [[b]] fn f xs = map (map f) xs
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@owainlewis@ifesdjeen@sanityinc@dibblego It occurs to me you also may be looking at an entry to lenses, but I don't know much about them.
@JulianBirch @owainlewis @ifesdjeen @sanityinc (fmap . fmap) has the same type (specialised) as fmap. Take a look at that type.