Androidでkotlin, DataBinding, RxJava, RxPropertyを利用してMVVMな感じでfizz buzz する - Qiita

init { val countStream = buttonTapStream .map({ event -> 1 }) .scan({ sum, n -> sum + n }) .publish() .refCount() countStream.subscribe({ n -> count = n.toString() }) val fizzStream = countStream.map({ n -> n % 3 == 0 }) fizzStream.subscribe({ isShown -> fizzVisibility = if (isShown) View.VISIBLE else View.INVISIBLE }) val buzzStream = countStream.map({ n -> n % 5 == 0 }) buzzStream.subscribe({ is