<Can’t find a good answer in SO> What’s an idiomatic way to check if a list (or set) contains only one specific value? anything better than

checkedSet.contains(value) && checkedSet.size == 1

?

what about

.filter{it==value}.size == 1

?

checkedSet == setOf(value)

?

I see… So far I got

checkSet.singleOrNull { it == value } != null

but I’m not liking the null check lol

aa so in case of

listOf("A","B").containsOnlyOneSpecificValue("A")

you expect false?

yes

then:

checkedSet.singleOrNull()==value

Oh…. yeah…

null==value will give you false so you are safe

yeah, the value is an enum, can’t be null