Combines elements from this publisher with those from another publisher, delivering an interleaved sequence of elements.
- iOS 13.0+
- macOS 10.15+
- Mac Catalyst 13.0+
- tvOS 13.0+
- watchOS 6.0+
- Xcode 11.0+
A publisher that emits an event when either upstream publisher emits an event.
The merged publisher continues to emit elements until all upstream publishers finish. If an upstream publisher produces an error, the merged publisher fails with that error.