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The TypeScript Workshop

The TypeScript Workshop

By : Ben Grynhaus , Jordan Hudgens , Rayon Hunte , Matt Morgan , Wekoslav Stefanovski
4.7 (19)
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The TypeScript Workshop

The TypeScript Workshop

4.7 (19)
By: Ben Grynhaus , Jordan Hudgens , Rayon Hunte , Matt Morgan , Wekoslav Stefanovski

Overview of this book

By learning TypeScript, you can start writing cleaner, more readable code that’s easier to understand and less likely to contain bugs. What’s not to like? It’s certainly an appealing prospect, but learning a new language can be challenging, and it’s not always easy to know where to begin. This book is the perfect place to start. It provides the ideal platform for JavaScript programmers to practice writing eloquent, productive TypeScript code. Unlike many theory-heavy books, The TypeScript Workshop balances clear explanations with opportunities for hands-on practice. You’ll quickly be up and running building functional websites, without having to wade through pages and pages of history and dull, dry fluff. Guided exercises clearly demonstrate how key concepts are used in the real world, and each chapter is rounded off with an activity that challenges you to apply your new knowledge in the context of a realistic scenario. Whether you’re a hobbyist eager to get cracking on your next project, or a professional developer looking to unlock your next promotion, pick up a copy and make a start! Whatever your motivation, by the end of this book, you’ll have the confidence and understanding to make it happen with TypeScript.
Table of Contents (16 chapters)
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Preface
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2
2. Declaration Files
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5. Interfaces and Inheritance
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6. Advanced Types
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8. Dependency Injection in TypeScript
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9. Generics and Conditional Types
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11. Higher-Order Functions and Callbacks
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3. Functions

Activity 3.01: Building a Flight Booking System with Functions

Solution:

  1. Start with the stubs provided in code samples. We have three files: index.ts, bookings.ts, and flights.ts. The index.ts file is a bit abstract and will just represent some of the transactions we push into our system. bookings.ts handles the user-facing activities of managing a booking, and flights.ts is the back office of filling up flights and making sure that everybody has a seat.
  2. The index.ts file won't change unless you feel like changing it and adding some new scenarios. Let's run it without adding any code:
    npx ts-node index.ts Not implemented!

    So we have work to do. Several functions are not yet implemented. Let's start by looking at flights.ts. There is a partial implementation there as we have an interface called Flights that describes the attributes of a flight, a list of available flights implementing that interface, and even a method to fetch the flights, called...

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