Combining operator: merge(with:)

MergeWith.Swift

let strings1 = PassthroughSubject<String, Never>()
let strings2 = PassthroughSubject<String, Never>()

strings1
    .merge(with: strings2)
    .sink { print($0) }

strings2.send("A")
strings1.send("B")

// Output:
//      A
//      B