Carleton DiLeo

Clean Ruby

A Guide to Crafting Better Code for Rubyists

• Broschiertes Buch

Produktbeschreibung

Learn how to make better decisions and write cleaner Ruby code. This book shows you how to avoid messy code that is hard to test and which cripples productivity. Author Carleton DiLeo shares hard-learned lessons gained from years of experience across numerous codebases both large and small. Each chapter covers the topics you need to know to make better decisions and optimize your productivity. Many books will tell you how to do something; this book will tell you why you should do it. Start writing code you love.

What You Will Learn

Build better classes to help promote code reuse Improve your decision making and make better, smarter choicesIdentify bad code and fixed itCreate quality names for all of your variables, classes, and modules Write better, concise classesImprove the quality of your methodsProperly use modules Clarify your Boolean logic See when and how you refactorImprove your understanding of TDD and write better tests
Who This Book Is For
This book is written for Ruby developers. There is no need to learn a new language or translate concepts to Ruby.

Produktdetails

• Verlag: Apress / Springer, Berlin
• Artikelnr. des Verlages: 978-1-4842-5545-2
• 1st ed.
• Seitenzahl: 124
• Erscheinungstermin: 30. November 2019
• Englisch
• Abmessung: 235mm x 155mm x 8mm
• Gewicht: 201g
• ISBN-13: 9781484255452
• ISBN-10: 1484255453
• Artikelnr.: 57840967

Autorenporträt

Carleton DiLeo has been writing code ever since he built his first computer from parts in a dumpster. He has written code from high-traffic websites to back-end big data systems for video games. This wide base of knowledge provides Carleton with a unique perspective when writing Ruby code.

Inhaltsangabe

• The Qualities of Clean Code
  • Readability
  • Extensibility
  • Simplicity
• Naming Things
• Variables
  • Naming conventions
  • The data
  • Length
  • Avoid unnecessary information
  • Avoid conjunctions
  • Only alpha characters
• Methods
  • Use verbs
  • Return value
  • Bang methods
• Classes
• Purpose
• Role

Modules

Creating Quality Methods

• Parameters
  • Use fewer parameters
  • Parameter order
• Return Values
• Guard Clause
• Length
  • How to shorten a method
  • Too short
• Comments
  • Quality comments
  • Stale comments
  • Comments and refactoring
• Limit Nesting

Using Boolean Logic

Using a Variable

Using a Method

Unless

Ternary operator

Double negative

Truthy and Falsy

• Truthy Values
• Falsy Values

& vs &&

Classes

Initialize Method

• Keep it Simple
• Avoiding Errors
• Too many parameters

Class methods vs instance methods

Instance variables

Private methods

Method order

Moving methods to a module

Limiting Inheritance

Refactoring

• No change too small
• Tests
• Single Responsibility Principle

Test-Driven Development (TDD)

Start with tests

Implement our code

More Tests

Clean Tests

Wrapping up