How to swap keys and values in a Map elegantly

Question

I already know how to do it the hard way and got it working - iterating over entries and swapping \"manually\". But i wonder if, like so many tasks, this one can be solved

Answer 1

Maps are not like lists, which can be reversed by swapping head with tail.

Objects in maps have a computed position, and using the value as key and the key as value would requiere to re-compute the storage place, essentialy building another map. There is no elegant way.

There are, however, bidirectional maps. Those may suit your needs. I'd reconsider using third-party libraries.