@Adnan Ah nice, indeed works great. Unfortunately I cannot use it how I wanted to use it, since it also transforms invalid Roman numbers to decimals, but that's ok.
Hmm, I think quite a few commands are missing from the docs right now though. ;)
@Mr.Xcoder @Adnan @Emigna What does .k do? It works the same as k right now it seems. Wasn't .k supposed to return a list of all indices that matches, instead of only the first?
@KevinCruijssen Doesn't seem to different than k from what I can see. By its description I would have assumed it would return the index of an element in a nested structure. So [[1,2][3,4]] 3.k -> 2 or something along those lines