Book Image

Agile Technical Practices Distilled

By : Pedro M. Santos, Marco Consolaro, Alessandro Di Gioia
Book Image

Agile Technical Practices Distilled

By: Pedro M. Santos, Marco Consolaro, Alessandro Di Gioia

Overview of this book

The number of popular technical practices has grown exponentially in the last few years. Learning the common fundamental software development practices can help you become a better programmer. This book uses the term Agile as a wide umbrella and covers Agile principles and practices, as well as most methodologies associated with it. You’ll begin by discovering how driver-navigator, chess clock, and other techniques used in the pair programming approach introduce discipline while writing code. You’ll then learn to safely change the design of your code using refactoring. While learning these techniques, you’ll also explore various best practices to write efficient tests. The concluding chapters of the book delve deep into the SOLID principles - the five design principles that you can use to make your software more understandable, flexible and maintainable. By the end of the book, you will have discovered new ideas for improving your software design skills, the relationship within your team, and the way your business works.
Table of Contents (31 chapters)
Free Chapter
Section 1
Section 2
Section 3
Section 4
Chapter 21
License: CyberDojo

The 3 Cs of Design: From Cohesion and Coupling to Connascence

Just as the forces are deeply connected, so are the concepts of coupling, cohesion, and connascence. Let's look at this example to better understand this point:

public class OrderFlow
    public void Execute(int customerId, int categoryId, int[] itemIds)
        var orderId = GenerateOrderId();
        orderProcessor.ProcessOrder(orderId, customerId, categoryId, itemIds);
        invoiceProcessor.ProcessInvoice(orderId, customerId, categoryId, itemIds);

Look at this code from the point of view of coupling and cohesion. How does it look? Not really good, right? We have a long list of parameters that clearly make the method coupling score pretty high for the Execute method...