Ruby Wizardry by Weinstein, Eric -- Read -- Imperial Library of Trantor

Index

Ruby Wizardry: An Introduction to Programming for Kids

Eric Weinstein

About the Author About the Technical Reviewers Foreword Acknowledgments Chapter 1. What This Book’s About Why Learn Programming (and Why Ruby)? All Adults on Deck: Installing Ruby

Installing on Mac or Linux Installing on Windows

Using RubyInstaller

Achievement Unlocked: Ruby Installed! Putting on the Ruby Slippers Getting to Know IRB Using a Text Editor and the ruby Command

Note Mac Linux Windows Creating Your First Script

When to Use IRB and When to Use a Text Editor The Prompts Used in This Book Into the Shiny Red Yonder Chapter 2. The King and His String A Short Yarn A Bit More About Variables Ruby Operators A Smallish Project for You

Note

You Know This! Chapter 3. Pipe Dreams The Apprentice Plumber’s Dilemma Writing and Running Ruby Scripts His Majesty’s Flow Control Improving flow_rate.rb with Fancier Logical Operators A Biggerish Project for You You Know This! Chapter 4. Staying in the Loop Ruby on Monorails while Loops

Note

Arrays Putting Arrays and Loops into Action Your Project, Should You Choose to Accept It You Know This! Chapter 5. Array of Sunshine and Hash on the Range Big Hank’s Hashery Arrays Within Arrays Even More Array Methods! Shift! Pop! Insert! Iterating with Arrays Hash in the Hashery Rollicking Ranges Order Up! You Know This! Chapter 6. The (Chunky) Bacon to Ruby’s Hash Symbols! The Skinny on Symbols Symbols and Hashes, Together at Last The Mid-morning Rush What Else Can You Do with Symbols? You Know This! Chapter 7. The Magic of Methods and Blocks A Method to the Madness Defining Your Own Methods

return Versus puts Understanding Method Arguments

What Is nil? Splat Parameters Block Methods Into the Dagron’s Lair You Know This! Chapter 8. Everything Is an Object (Almost) The Subject of Our Story Is an Object Classes and Objects Creating Our First Class, Minstrel

Note Note

Variable Scope

These Variable Errors Will Shock and Surprise You! Global Variables Class Variables Instance Variables Local Variables

Objects and self Methods and Instance Variables Dial-a-Ballad, or the Minstrel’s Delivery Service You Know This!

Objects and Classes Variables and Scope Object-Oriented Programming

Chapter 9. Inheriting the Magic of Ruby Her Majesty’s Menagerie A Brush-up on Classes

A Couple of Classes Inheritance and DRY Code

Subclass and Superclass

Overriding Methods: Pirates are People, Too Using super

Protecting the Kingdom with GuardDogs and FlyingMonkeys

Every GuardDog Has His Day Once More, with Feeling!

The Queen’s Machine You Know This! Chapter 10. A Horse of a Different Color Utter Panda-monium Creating Modules Constants Extending Your Knowledge Mixins and Inheritance Requiring Another File

Note

Looking Up Constants

Note

A Horse of a Different Color You Know This! Chapter 11. Second Time’s the Charm Refactoring at the Refactory Variable Assignment Tricks Crystal-Clear Conditionals When You Need a case Statement Simplifying Methods De-duplicating Code Re-refactoring You Know This! Chapter 12. Reading, Writing, and Ruby Magic File Input and Output Opening a File with Ruby Writing and Adding to Files Avoiding Errors While Working with Files All Loading Docks, Report for Duty! You Know This! Chapter 13. Follow the WEBrick Road Ruby and the Internet Using the open-uri Ruby Gem

Note Note

Investigating the Kingdom’s Web Server Beyond the Kingdom Walls You Know This! Chapter 14. Where to Go Next The Big Picture: What You Know Additional Resources and Further Reading

Beginner Books Intermediate Books Advanced Books

Online and Multimedia

Railscasts

(http://railscasts.com/)

Ruby5 podcast

(http://ruby5.envylabs.com/)

Ruby Rogues

(http://rubyrogues.com/)

Ruby Tapas

(http://www.rubytapas.com/)

Ruby Weekly

(http://rubyweekly.com/)

Interactive Resources

Codecademy

(http://www.codecademy.com/tracks/ruby/)

Code School

(https://www.codeschool.com/paths/ruby/)

Ruby Koans

(http://rubykoans.com/)

Ruby Monk

(https://rubymonk.com/)

Additional Topics

The Enumerable module Regular expressions Procs and lambdas Information hiding Handling exceptions Reflection/metaprogramming Debugging Threads and processes Creating websites

Appendix A. Installing Ruby on Mac and Linux Installing on Mac Installing on Linux Appendix B. Troubleshooting Errors Running Ruby Scripts

Command Not Found No Such File or Directory

Errors Using IRB

Undefined Local Variable or Method Syntax Error Can’t Convert nil into String You Were Saying . . . ? Clear the Screen Go Back to a Previous Command Look It Up!

Updates More Smart Books for Curious Kids! Index

A note on the digital index Symbols A B C D E F G H I J K L M N O P Q R S T U V W Y Z

Ruby Wizardry: An Introduction to Programming for Kids

Eric Weinstein

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