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    Practical Ruby 3 Programming: Simpler than Python, offering concise syntax, reusable code, and maximum developer productivity
    Practical Ruby 3 Programming: Simpler than Python, offering concise syntax, reusable code, and maximum developer productivity
    Practical Ruby 3 Programming: Simpler than Python, offering concise syntax, reusable code, and maximum developer productivity
    Ebook195 pages1 hour

    Practical Ruby 3 Programming: Simpler than Python, offering concise syntax, reusable code, and maximum developer productivity

    By Zorin Fylix

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    About this ebook

    This book gives Ruby fans the skills they need to become well-versed in Ruby and build solid applications. It starts with the basics and moves on to exploring the power of blocks, procs, and lambdas. You'll learn how these constructs make your code more flexible and reusable. As you go through it, you'll learn about enumerators, which

    LanguageEnglish
    PublisherGitforGits
    Release dateDec 20, 2024
    ISBN9788198431677
    Practical Ruby 3 Programming: Simpler than Python, offering concise syntax, reusable code, and maximum developer productivity

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      Book preview

      Practical Ruby 3 Programming - Zorin Fylix

      Practical Ruby 3 Programming

      Simpler than Python, offering concise syntax, reusable code, and maximum developer productivity

      Zorin Fylix

      Preface

      This book gives Ruby fans the skills they need to become well-versed in Ruby and build solid applications. It starts with the basics and moves on to exploring the power of blocks, procs, and lambdas. You'll learn how these constructs make your code more flexible and reusable. As you go through it, you'll learn about enumerators, which help you streamline iteration and handle complex data transformations with ease. Then, you'll dive into the exciting world of RubyGems, where you'll learn to find, install, and manage gems like a pro. You'll get hands-on with popular gems like Nokogiri and Faker, showing how to take Ruby to the next level for tasks like parsing HTML and generating realistic test data. And you'll even learn how to create and distribute your own custom gems, so you can share your innovations with the entire Ruby community.

      Performance is a big focus too, with techniques for measuring how well Ruby programs run and finding the things that slow them down. It also covers packaging Ruby applications in detail, showing how to create executables and prepare programs for seamless distribution to your users. It's all about keeping track of changes with Git, working with others, and keeping your project history neat and tidy. By the time you're done with this book, you'll have a firm grasp on Ruby and the know-how to create, optimize, and deploy cutting-edge Ruby applications. This book will take all you Ruby fanatics and transform you into proficient developers. You'll be ready to take on real-world challenges and contribute to the whole Ruby ecosystem.

      In this book you will learn to:

      Get a handle on Ruby's blocks, procs, and lambdas so you can create flexible, reusable code.

      Package your Ruby applications into ready-to-go executables and gems for easy distribution.

      Use enumerators to quickly handle complex data transformations and iteration processes.

      Find and manage RubyGems to add more features to your apps with libraries made by the community.

      Measure performance and identify code bottlenecks with benchmarking techniques.

      Use Git for version control to track changes, collaborate, and keep a clean project history.

      Use popular gems like Nokogiri and Faker to improve how you parse data and generate realistic test data.

      Follow best practices for debugging, performance optimization, and dependency management for apps.

      Prologue

      Why Ruby?

      Well, for one thing, it's got a sleek and simple vibe that not many languages can match. When I first came across Ruby, I was hooked. The syntax is easy to read, and it makes writing clean, expressive code a breeze. It’s not just a tool; it feels like an extension of your thoughts, making it super easy to bring your ideas to life. It's this perfect mix of power and simplicity that makes Ruby a favorite among developers who value both productivity and creativity. In Practical Ruby 3 Programming, we'll start by exploring the basics of Ruby, like blocks, procs, and lambdas. These powerful tools help you write flexible and reusable code, making your programs efficient and easy to maintain. As we go along, you'll learn how to handle complex data changes with ease. Ruby’s ecosystem is huge and active, and knowing RubyGems is key to getting the most out of it. We'll walk through finding, installing, and managing gems, so you can easily extend your apps with community-supported libraries. You’ll also get hands-on experience with popular gems like Nokogiri and Faker, which'll boost your data parsing and creating realistic test scenarios.

      Performance is a huge deal for any app, and I'll show you how to benchmark your Ruby programs to identify and eliminate bottlenecks. You'll learn practical techniques to measure execution speed and optimize your code, ensuring your applications run smoothly even under heavy loads. We'll also talk about packaging your Ruby apps for distribution. You'll learn how to create executable scripts and bundle your program into gems so you can share your creations with the world, no problem. We'll also dive into version control with Git, a tool that'll totally change the way you manage and work on your projects.

      You'll engage with real-world examples and practical exercises that reinforce each concept throughout this book. My goal is to give you practical knowledge that you can apply right away, turning theoretical understanding into real skills. By the time we're done, you'll be super proficient in Ruby and totally confident in your skills to build, optimize, and deploy some seriously sophisticated Ruby applications. Ruby's got a special charm that makes you feel like you're accomplishing something every time you write a line of code. Practical Ruby 3 Programming isn't just a bunch of lessons—it's an invitation to embrace a language that makes programming enjoyable and rewarding.

      Let's go on this journey together, unlocking the full potential of Ruby and transforming the way you create web applications and programs.

      Copyright © 2024 by GitforGits

      All rights reserved. This book is protected under copyright laws and no part of it may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying, recording, or by any information storage and retrieval system, without the prior written permission of the publisher. Any unauthorized reproduction, distribution, or transmission of this work may result in civil and criminal penalties and will be dealt with in the respective jurisdiction at anywhere in India, in accordance with the applicable copyright laws.

      Published by: GitforGits

      Publisher: Sonal Dhandre

      www.gitforgits.com

      [email protected]

      First Printing in India: December 2024

      Cover Design by: Kitten Publishing

      For permission to use material from this book, please contact GitforGits at [email protected].

      Content

      Preface

      GitforGits

      Acknowledgement

      Chapter 1: Getting Started with Ruby 3

      Chapter Overview

      Installing Ruby on Linux

      Installing Ruby on Linux

      Step-by-Step Installation with Package Managers

      Using RVM or ‘rbenv’

      Verifying Installation

      Using Interactive Ruby (IRB) Shell

      Introduction to IRB

      Launching IRB

      Practical Demonstrations and Experimentation

      Basic Program Execution

      Creating Sample Program

      Executing Ruby Scripts

      Passing Command-Line Arguments

      Summary

      Chapter 2: Up and Running with Ruby Syntax

      Chapter Overview

      Working with Literals

      Overview of Numeric Literals

      Strings

      Symbols

      Boolean Values

      Sample Program: Numeric, String, Symbol, and Boolean Literals all together

      Variables and Constants

      Differentiating Variables and Naming Conventions

      Understanding Constants

      Integrating Variables and Constants

      Keyword Arguments and Default Values

      Introducing Keyword Arguments

      Using Default Values in Methods

      Summary

      Chapter 3: Exploring Control Flow and Blocks

      Chapter Overview

      Conditionals and Loops

      ‘if’ Statements

      ‘case’ Structure

      ‘while’ Loops

      Implementing ‘for’ Loops

      Sample Program: Integrating Conditionals and Loops

      Blocks and Iterators

      ‘each’ Method

      Transforming Data with ‘map’

      Additional Iterator Methods

      Sample Program: Integrating Iterators

      Numbered Parameters in Blocks

      Introducing Numbered Parameters

      Basic Usage with Arrays and Hashes

      Sample Program

      Integrating Numbered Parameters with Existing Methods

      Summary

      Chapter 4: Handling Errors Gracefully

      Chapter Overview

      Raising and Rescuing Exceptions

      Using ‘raise’ and ‘rescue’

      Customizing Exception Classes

      Sample Program: Resilient Error Handling

      Ensure and Retry Blocks

      Ensure for Cleanup

      Implementing Retry Mechanism

      Catch and Throw for Non-Local Exits

      Understanding ‘Catch’ and ‘Throw’

      Using Non-Local Exits

      Sample Program

      Summary

      Chapter 5: Object-Oriented Programming Basics

      Chapter Overview

      Defining and Using Classes

      Defining a Class and Initializing Objects

      Sample Program: Incorporating Classes

      Access Control for Methods

      Public, Private, and Protected Methods

      Sample Program: Implementing Access Control

      Improvising Program with Access Control

      Inheritance and Polymorphism

      Leveraging Inheritance

      Utilizing Polymorphism for Flexible Code

      Sample Program: Integrating Inheritance and Polymorphism

      Summary

      Chapter 6: Modules and Refinements

      Chapter Overview

      Including and Extending Modules

      Need for Sharing Functionalities

      Defining Modules for Reusable Functionality

      Including Modules in Classes

      Extending Modules for Class Methods

      Using Module#prepend

      ‘Module#prepend’ Overview

      Differences Between ‘include’ and ‘prepend’

      Sample Program: ‘Module#prepend’ Implementation

      Implementing Refinements

      Exploring Refinements

      Defining a Refinement Module

      Activating Refinements

      Summary

      Chapter 7: Advanced Methods and Metaprogramming

      Chapter Overview

      Using ‘eval’ and ‘define_method’

      Exploring ‘eval’

      Using ‘define_method’

      Sample Program: Integrating ‘eval’

      Sample Program: Demonstrating ‘define_method’

      Accessing Object State Dynamically

      Introspection Overview

      Sample Program: Implementing ‘instance_variable_get’

      Building DSLs with Metaprogramming

      Domain-Specific Languages (DSLs) Overview

      Designing a Basic DSL

      Sample Program: Implementing a DSL

      Summary

      Chapter 8: Built-in Classes and Modules

      Chapter Overview

      Object, Module, and Kernel

      Exploring ‘Object’ Class

      Kernel’s Omnipresent Methods

      Enumerable and Comparable Modules

      Enumerable Module

      Sample Program: Enumerable in Practice

      Comparable for Custom Comparisons

      Combination of Enumerable and Comparable

      Sample Program: Leveraging Enumerable and Comparable

      Using Regular Expressions

      Introduction to Regular Expressions

      Using Regex for Pattern Matching and Text Manipulation

      Sample Program: Integrating Regex

      Summary

      Chapter 9: Working with Procs, Lambdas, and Enumerators

      Chapter Overview

      Creating Procs and Lambdas

      Introduction to Lambdas

      Exploring Procs

      Sample Program: Putting Blocks, Lambdas and Procs into Action

      Chaining Operations with Enumerators

      Setting up Chained Calls

      Sample Program: Applying Enumerators in Complex Case

      Lazy Enumeration

      Sample Program: Extending Enumerators

      Debugging Chained Code

      Leveraging Proc Objects

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