Functional Programming with C# by Alex Yagur

Author:Alex Yagur
Language: eng
Format: epub
Publisher: Packt Publishing Pvt Ltd
Published: 2024-07-11T00:00:00+00:00

These constructs collectively can enhance our programming, enabling code reuse, higher abstraction, and a flexible, functional style.

Let’s continue with even more exciting constructs next.

Callbacks, events, and anonymous methods

Callbacks are a pivotal concept in asynchronous and event-driven programming. They are essentially delegates that point to a method, allowing it to be called at a later time. This facilitates non-blocking code execution, crucial for responsive applications.

Imagine a book publishing system where we need to perform actions such as sending notifications after a book is published. Here, a callback can notify other parts of the system once the publishing process is completed:

public delegate void BookPublishedCallback(string bookTitle); public class BookPublishingManager { public void PublishBook(string bookTitle, BookPublishedCallback callback) { // Book publishing logic here... callback(bookTitle); } } // Usage BookPublishingManager manager = new BookPublishingManager(); manager.PublishBook("C# in Depth", title => Console.WriteLine($"{title} has been published!"));

In this scenario, the callback is invoked after a book is published, providing a flexible and decoupled way of handling post-publishing processes.

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