dropFirstValueOnChange.swift

let subject = PassthroughSubject<Int, Never>()

let cancellable = subject
    .scan((nil, nil)) { previous, current in
        (previous.1, current)
    }
    .drop(while: {
// Why does the `drop(while:)` never return true here when Optional(1) == Optional(1)? Is this a bug?
        if $0.0 == $0.1 {
            return true
        } else {
            return false
        }
    })
    .sink {
        if $0.0 == $0.1 {
            print("Received value eq:", $0)
        } else {
            print("Received value:", $0)
        }
    }

subject.send(0)
subject.send(1)
subject.send(1)
subject.send(2)
subject.send(3)

code is wrong, I was looking for filter not drop(while:): https://twitter.com/mhuletdev/status/1660516277750845443?s=61&t=SNyDtIC1NNwqU3KSV1B9OQ