Get number of items in a ReplaySubject with Array Element

Question

I have to use ReplaySubject in my project like that:

let myVariable = ReplaySubject<[MyItems]>.create(bufferSize: myBufferSize)

How can I get the number of items in the array of "MyItems"?

Answer 1

只需将数组映射到其计数即可：

let countObservable = myVariable.map { $0.count }