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kotlinlang

In the Arrow docs all there is in Traversals is a section on  Every... what if I have a map and I want to focus on one element at a position in the map and change the value in the hierarch of that element?

I guess the docs are really missing `Index` (and perhaps `At`...)? It would be great to have them there... it's a bit hard for newcomers to know what's possible...

Agreed, Index and At were really the missing pieces for us to understand how to work effectively with optics.

To this day, I would have been very happy to have a reference to remind me the difference between At and Index... I'm hoping I'm using Index right and at worst, I'll have to search in this channel to find some explanation... :man-shrugging::skin-tone-3: