An extension that won't create reference-cycles when using assign(to:on:) or sink(receiveValue:)

PublisherExtension.swift

extension Publisher where Failure == Never {
    func weakAssign<T: AnyObject>(
        to keyPath: ReferenceWritableKeyPath<T, Output>,
        on object: T
    ) -> AnyCancellable {
        sink { [weak object] value in
            object?[keyPath: keyPath] = value
        }
    }

    func weakSink<T: AnyObject>(
        _ weaklyCaptured: T,
        receiveValue: @escaping (T, Self.Output) -> Void
    ) -> AnyCancellable {
        sink { [weak weaklyCaptured] output in
            guard let strongRef = weaklyCaptured else { return }
            receiveValue(strongRef, output)
        }
    }
}

Original source: https://www.fadel.io/blog/posts/30-tips-to-make-you-a-better-ios-developer/?utm_source=swiftlee&utm_medium=swiftlee_weekly&utm_campaign=issue_94