Hello! Mutable state is common source of bugs, spe...

# mvikotlin

[Arkadii Ivanov]

Hello! Mutable state is common source of bugs, specially with declarative UI frameworks. I suggest to always use immutable structures, unless you are really optimizing the performance with a profiler.

So yes, copy data classes and it's lists and maps. You can add an entry to an immutable map as follows: map = map + (key to value)

[Nikola Milovic]

Cool trick for the map! Nice, thanks