Should I use

someMap.filterValues { it != null }.mapValues { it.value as Any }

or is there anything like

someList.filterNotNull()

for `Map`s?

Not yet: https://youtrack.jetbrains.com/issue/KT-4734

Is there no general solution coming for this? Ie. also for

.filter { it is String }

.

@karelpeeters

listOf<Any>().filterIsInstance<String>()

exists.

Hmm, okay. Still, I wonder if it is possible to get the typesystem to understand things like this?

@karelpeeters It was a use case for contracts to express the relation between

filter

predicate and the return type, however we haven't yet found the way to express that (@dsavvinov correct me if I'm wrong)

That's unfortunate. I'm looking forward to the contract stuff though!

You can make it yourself 😉