Transforms all elements from an upstream publisher into a new or existing publisher.
- iOS 13.0+
- macOS 10.15+
- Mac Catalyst 13.0+
- tvOS 13.0+
- watchOS 6.0+
- Xcode 11.0+
The maximum number of publishers produced by this method.
A closure that takes an element as a parameter and returns a publisher that produces elements of that type.
A publisher that transforms elements from an upstream publisher into a publisher of that element’s type.
flat merges the output from all returned publishers into a single stream of output.