Any programmer working with a dynamically typed language will tell you how hard it is to scale to more lines of code and more engineers. That’s why Facebook, Google, and Microsoft invented gradual static type layers for their dynamically typed JavaScript and Python code. This practical book shows you how one such type layer, TypeScript, is unique among them: it makes programming fun with its powerful static type system.

If you’re a programmer with intermediate JavaScript experience, author Boris Cherny will teach you how to master the TypeScript language. You’ll understand how TypeScript can help you eliminate bugs in your code and enable you to scale your code across more engineers than you could before.

“Ruby on Rails™ Tutorial by Michael Hartl has become a must-read for developers learning how to build Rails apps.”
—Peter Cooper, Editor of Ruby Inside
Used by sites as varied as Disney, GitHub, Shopify, and Airbnb, Ruby on Rails is one of the most popular frameworks for developing web applications, but it can be challenging to learn and use. Whether you’re new to web development or new only to Rails, Ruby on Rails™ Tutorial, Sixth Edition, is the solution.

Best-selling author and leading Rails developer Michael Hartl teaches Rails by guiding you through the development of three example applications of increasing sophistication. The tutorial’s examples focus on the general principles of web development needed for virtually any kind of website. The updates to this edition include full compatibility with Rails 6.

This indispensable guide provides integrated tutorials not only for Rails, but also for the essential Ruby, HTML, CSS, and SQL skills you need when developing web applications. Hartl explains how each new technique solves a real-world problem, and then he demonstrates it with bite-sized code that’s simple enough to understand while still being useful. Whatever your previous web development experience, this book will guide you to true Rails mastery.

This book will help you

• Install and set up your Rails development environment, including a pre-installed integrated development environment (IDE) in the cloud
• Go beyond generated code to truly understand how to build Rails applications from scratch
• Learn testing and test-driven development (TDD)
• Effectively use the Model-View-Controller (MVC) pattern
• Structure applications using the REST architecture
• Build static pages and transform them into dynamic ones
• Master the Ruby programming skills all Rails developers need
• Create high-quality site layouts and data models
• Implement registration and authentication systems, including validation and secure passwords
• Update, display, and delete users
• Upload images in production using a cloud storage service
• Implement account activation and password reset, including sending email with Rails
• Add social features and microblogging, including an introduction to Ajax
• Record version changes with Git and create a secure remote repository at GitHub
• Deploy your applications early and often with Heroku