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

Design Smells

These are high-level smells – the tip of the iceberg. We should treat these smells as flashing warning signs. They definitely alert us about big problems, though they provide little information on the real cause of those problems.

If we find a design smell, it's probably time to stop, reflect upon our past design decisions, and decide whether we need to revisit those decisions. The problem with design smells is that they tend to take time to manifest, and sometimes it's too late.

The following is a list of design smells:

  • Rigidity: The system is hard to change because every change forces many other changes to other parts of the system.
  • Fragility: Changes cause the system to break in places that have no conceptual relationship to the part that was changed.
  • Immobility: It is hard to disentangle the system into components that can be reused in the other systems.
  • Viscosity: Doing things right is harder than doing things wrong.
  • ...