init(upstream:initial:nextPartialResult:)
Creates a publisher that applies a closure to all received elements and produces an accumulated value when the upstream publisher finishes.
Declaration
init(upstream: Upstream, initial: Output, nextPartialResult: @escaping (Output, Upstream.Output) -> Output)Parameters
- upstream:
The publisher from which this publisher receives elements.
- initial:
The initial value provided on the first invocation of the closure.
- nextPartialResult:
A closure that takes the previously-accumulated value and the next element from the upstream publisher to produce a new value.