Mastering JavaScript Functional Programming - Third Edition

Table of Contents

Preface

1

Becoming Functional – Several Questions

What is functional programming?

Theory versus practice

A different way of thinking

FP and other programming paradigms

What FP is not

Why use FP?

What we need

What we get

Not all is gold

Is JavaScript functional?

JavaScript as a tool

Going functional with JavaScript

Key features of JavaScript

How do we work with JavaScript?

Using transpilers

Working online

A step further – TypeScript

Testing

Summary

Questions

2

Thinking Functionally – A First Example

Our problem – doing something only once

Solution 1 – hoping for the best!

Solution 2 – using a global flag

Solution 3 – removing the handler

Solution 4 – changing the handler

Solution 5 – disabling the button

Solution 6 – redefining ...