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

Object Calisthenics – 10 Steps to Better Software Design

Object calisthenics is a simple ruleset that, if applied correctly, should have a big effect on your designs. For the time being, follow these rules; we will discuss the principles behind them later on:

  • Only one level of indentation per method
  • Don't use the ELSE keyword
  • Wrap all primitives and strings (wrap primitive types in classes)
  • First-class collections (wrap collections in classes)
  • One dot per line
  • Don't abbreviate
  • Keep all entities small
  • No classes with more than two instance variables
  • No getters/setters/properties
  • All classes must have state

Object calisthenics does not give you anything new; on the contrary, it takes stuff away. Expect these rules/constraints to be challenging/frustrating if you have never used them before. Be strict for now – no exceptions! The time to bend the rules has not yet come.


Pay extra attention to not...