Combine: zip issue, 05

code.swift

import Combine

let events = PassthroughSubject<String, Never>()

let numbers = (0...).publisher
    .print("numbers")

let subscriber = events
    .print("events")
    .zip(numbers)
    .map { ($1, $0) }  // swap
    .customSink(
        initialDemand: .max(5),
        receiveValue: { value in
            print(value)
    })

events.send("foo")
events.send("bar")