mapIndexed

// indexedMap :: Functor f => ((a, c, [a]) -> b) -> f a -> f b
export const indexedMap = addIndex(map);

[char0n]

And to be consistent with ramda I’d rename to mapIndexed

[char0n]

I guess ramda made a unfortunate decision when naming mapObjIndexed. I’d name it mapObjKeyed too. This error/inconsistency should not deter us from naming our functions property. In https://github.com/char0n/ramda-adjunct/issues/66 we want to define predicate called isIndexed. In javascript indexed are Arrays and Strings (Set, Map don’t apply, and objects converts their keys to strings). So in this context and in my mind naming the function mapIndexed is be most correct thing we can do.