CombineLatest of Publishers

CombineLatest.swift

import Combine

// A set to store any active Combine subscriptions (cancellables).
// This ensures that subscriptions are kept alive and not deallocated prematurely.
var cancellables = Set<AnyCancellable>()

// Create a publisher from an array of even integers.
let evenIntegersPublisher = [2, 4, 6, 8].publisher

// Create a publisher from an array of odd integers.
let oddIntegersPublisher = [1, 3, 5, 7, 9].publisher

// Use the `CombineLatest` operator to combine the latest values
// from the even and odd integer publishers.
// This will emit a tuple of values every time one of the publishers emits a value,
// taking the latest value from each publisher.
Publishers.CombineLatest(
    evenIntegersPublisher,
    oddIntegersPublisher
)
.sink { even, odd in
    // For every combined pair of even and odd integers, print them out.
    print("Latest even is ", even, " and latest odd is ", odd)
}
// Store the subscription in the `cancellables` set.
// This ensures that the subscription remains active and won't be prematurely deallocated.
.store(in: &cancellables)


//Latest even is  10  and latest odd is  1
//Latest even is  10  and latest odd is  3
//Latest even is  10  and latest odd is  5
//Latest even is  10  and latest odd is  7
//Latest even is  10  and latest odd is  9