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Mastering JavaScript Functional Programming

You're reading from   Mastering JavaScript Functional Programming Write clean, robust, and maintainable web and server code using functional JavaScript

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Product type Paperback
Published in Jan 2020
Publisher Packt
ISBN-13 9781839213069
Length 470 pages
Edition 2nd Edition
Languages
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Author (1):
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Federico Kereki Federico Kereki
Author Profile Icon Federico Kereki
Federico Kereki
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Table of Contents (17) Chapters Close

Preface 1. Technical Requirements
2. Becoming Functional - Several Questions FREE CHAPTER 3. Thinking Functionally - A First Example 4. Starting Out with Functions - A Core Concept 5. Behaving Properly - Pure Functions 6. Programming Declaratively - A Better Style 7. Producing Functions - Higher-Order Functions 8. Transforming Functions - Currying and Partial Application 9. Connecting Functions - Pipelining and Composition 10. Designing Functions - Recursion 11. Ensuring Purity - Immutability 12. Implementing Design Patterns - The Functional Way 13. Building Better Containers - Functional Data Types 14. Bibliography
15. Answers to Questions 16. Other Books You May Enjoy

Transforming Functions - Currying and Partial Application

In Chapter 6, Producing Functions – Higher-Order Functions, we saw several ways of manipulating functions, to get new versions with some change in their functionality. In this chapter, we will go into a particular kind of transformation, a sort of factory method, that lets you produce new versions of any given function, with some fixed arguments.

We will be considering the following:

  • Currying: A classic FP theoretical function that transforms a function with many parameters into a sequence of unary functions.
  • Partial application: Another time-honored FP transformation, which produces new versions of functions by fixing some of their arguments.
  • Partial currying (a name of my own): Can be seen as a mixture of the two previous transformations.

To be fair, we'll also see that some of these techniques can...

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