Book Image

Comprehensive Ruby Programming

By : Jordan Hudgens
Book Image

Comprehensive Ruby Programming

By: Jordan Hudgens

Overview of this book

Ruby is a powerful, general-purpose programming language that can be applied to any task. Whether you are an experienced developer who wants to learn a new language or you are new to programming, this book is your comprehensive Ruby coding guide. Starting with the foundational principles, such as syntax, and scaling up to advanced topics such as big data analysis, this book will give you all of the tools you need to be a professional Ruby developer. A few of the key topics are: object-oriented programming, built-in Ruby methods, core programming skills, and an introduction to the Ruby on Rails and Sinatra web frameworks. You will also build 10 practical Ruby programs. Created by an experienced Ruby developer, this book has been written to ensure it focuses on the skills you will need to be a professional Ruby developer. After you have read this book, you will be ready to start building real-world Ruby projects.
Table of Contents (20 chapters)

Ruby proc tutorial

In this section, we are going to examine the Proc module in Ruby. At a high level, procs are methods that can be stored inside variables.

Proc code example

Let's begin by creating a simple proc:

full_name = Proc.new{ |first, last| first + " " + last} 

Now, I can call this in two ways:

  • The first is to use the bracket syntax followed by the arguments I want to pass to it:
        p full_name["Jordan", "Hudgens"] 

  • I can also use the call method to run the proc and pass in the arguments inside of parentheses:
        p full_name.call("Jordan", "Hudgens") 

Let's go back and retrace the proc process. In this code, I'm creating a new instance...