max()
Publishes the maximum value received from the upstream publisher, after it finishes.
Declaration
func max() -> Publishers.Comparison<Self>Return Value
A publisher that publishes the maximum value received from the upstream publisher, after the upstream publisher finishes.
Discussion
Use max() to determine the maximum value in the stream of elements from an upstream publisher.
In the example below, the max() operator emits a value when the publisher finishes, that value is the maximum of the values received from upstream, which is 10.
let numbers = [0, 10, 5]
cancellable = numbers.publisher
.max()
.sink { print("\($0)") }
// Prints: "10"After this publisher receives a request for more than 0 items, it requests unlimited items from its upstream publisher.