How do I create custom Combine operators?

Creating custom Combine operators in Swift can allow for more expressive and reusable code when dealing with asynchronous events. Custom operators can encapsulate specific logic or behavior that can be reused across different publishers in your Combine pipeline.

Example of Creating a Custom Combine Operator

Below is an example of how to create a simple custom operator that filters even numbers from a stream of integers.


    import Combine
    
    extension Publisher where Output == Int {
        func filterEven() -> Publishers.Filter {
            return self.filter { $0 % 2 == 0 }
        }
    }
    
    // Usage
    let numbers = [1, 2, 3, 4, 5, 6]
    let publisher = numbers.publisher
    
    let cancellable = publisher
        .filterEven()
        .sink(receiveValue: { print($0) }) // Output: 2, 4, 6

How do I create custom Combine operators?

Example of Creating a Custom Combine Operator

Popular Topics

Recent Languages

How do I create custom Combine operators?

Example of Creating a Custom Combine Operator

Related Questions

Popular Topics

Recent Languages