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Ruby Variables

Ruby variables are the building blocks of just about every Ruby program. In this chapter, you will learn how to work with variables in Ruby to store data and use the data throughout a program. This is a pretty easy chapter and if you're already familiar with Ruby development you can skip this one. After completing this chapter you will be able to do the following:

Use variables to store data
Demonstrate how to change variable values

Key benefits

• Provides the core skills required to become a Ruby programmer

• Covers how to use the most popular Ruby Gem libraries

• Includes details on regular expressions

Description

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.

What you will learn

• Learn how to use Ruby code effectively, picking the right tool for the job and not duplicating built-in functionality

• Gain best software development practices, and how to identify and fix common errors

• Absorb core programming skills, such as variables, strings, loops, conditionals, and much more

• Explore object-oriented programming and learn to create modular, reusable code that you can use across projects

• Build 10 practical Ruby programs as you work through the book on topics such as big data analysis and solving Euler equations

What do you get with Print?

Instant access to your digital eBook copy whilst your Print order is Shipped

Paperback book shipped to your preferred address

Download this book in EPUB and PDF formats

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Total $ 136.97 Stars icon

Jerry P. Brook Jan 07, 2020

I am not new to computer programming; I enjoy learning new languages (new to me that is).That said, I find it infuriating when I come across a poorly written instruction manual. And I find that the vast majority of manuals are poorly written. Just because you can do, does not mean that you can teach.The fact that this book is authored by a person who claims to be a teacher is actually disturbing.I did not make it past the first thirty (30) pages of this book before putting it down in disgust.Let me explain; the author claims that this book is for beginners and yet at every step he uses terms that would be utterly unknown and confusing to the beginner.I am not a beginner and so I am familiar with the terms, however, such a poor writing style and confusing organization of the information and concepts indicates a true lack of knowledge of the educational process, and will lead the reader to frustration not education.In the second chapter entitled “Ruby Variables” he actually begins with output.There is nothing more than a single paragraph on what exactly variables are, why and how you would use them, he won’t tell you.In his second example of printing out to the console, again not an explanation of variables, he discusses arrays. Arrays is a topic supposedly not covered until chapter seven (7) of the book. Going into detail about a topic not yet covered, and so clearly not known to the reader shows a true lack of educational ability.For some unknown reason he focuses on the “puts” versus the “p” commands, why I do not know, because at this point the beginner still doesn’t even know what variables are.He then proceeds to the function of getting input from the user, again why? You haven’t learned about any of the basics at this point. He explains the “chomp” command with a few lines discussing the removal of the carriage return. We still haven’t even discussed variables, there use, there context, and he is off discussing items that no beginner will know anything about at this stage.His next code example uses the “if” statement, which won’t be covered until chapter 8. So, there is no way that the beginner will understand, or be able to truly follow, along – and I don’t know, learn something!But wait it gets worse, he then discusses scope (finally something relating to variables), except that he hasn’t explained program structure yet. So, scope is much to early, and of course he discusses; methods – not to be learned until chapter 5, loops – not to be learned until chapter 6, collections – not to be learned until chapter 7, and classes – not to be learned until chapter 9.Clearly, he is one of those people who does a brain dump, and simply regurgitates everything that he knows, or can say, all at once. With no context, and no iterative knowledge building. He doesn’t build a house from the ground up, in steps, each piece relying on the last in order to create a sound structure, a foundation.He has no concept that these principles themselves grew up and did not all appear at once. In other words, the very people who created these programming concepts had to slowly; add, modify, and improve them. Which means that they had to learn; why, how, when, and where, to use them. They didn't just happen all at once.It is safe to say that I do not recommend this book, and I would not recommend hiring this person to teach anyone, anything. If I could have given zero stars I would have.

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Ryan Oct 08, 2017

The code examples are too brief and lack explanation.. In some parts the code samples do not run at all, and what is worse is when I feel I simply mistyping something and need to reference the books code from githut, half the chapters are missing. If you can muddle your way through it, perhaps you can learn some ruby code.

Gregory V. Pastorelli Aug 06, 2017

Great book, having come from Python, it's an excellent way to add Ruby to my skill set. Unlike some technology books it's not dry and is an easy read

Comprehensive Ruby Programming: From beginner to confident programmer

What do you get with Print?

Comprehensive Ruby Programming

Ruby Variables

Using variables in Ruby

Variable code implementation

Printing to the Ruby console

Using puts

Using p

Getting input from the Ruby console using gets and chomp

Code implementation

Variable scope and variable types

Local variables

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Comprehensive Ruby Programming: From beginner to confident programmer

What do you get with Print?

Key benefits

Description

Who is this book for?

What you will learn

Product Details

What do you get with Print?

Product Details

Packt Subscriptions

Frequently bought together

Table of Contents

Recommendations for you

Customer reviews

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About the author

FAQs