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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

Intersection Types

Intersection Types allow you to combine types to form a new type with the properties of the combined types. This is useful in cases where you have an existing type that does not, by itself, address some data you need to define, but it can do so in combination with another existing type. This is similar to multi-class inheritance, as the child object can have more than one parent object that it derives its properties from.

Let's say you have a type A with a name and age property. You also have a type B with a height and weight property. In your application, you find that there is a need for a person type: you want to track the user's name, age, height, and weight. You can intersect type A and B to form a Person type. Why not just create a new type you ask? Well, this takes us back to wanting to be good coders and good coders stay DRY – Don't Repeat Yourself. Unless a type is truly unique in your application, you should reuse as much...

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