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Learn functional programming concepts using JavaScript ES6. You will learn concepts such as currying, partial functions, higher-order functions, and monads.

Programming languages have evolved from focusing on procedures to objects and now on function. JavaScript supports functional programming and allows developers to write well-crafted code.

What You Will Learn:

Master functional programming concepts
Identify how functions are treated in JavaScript
Understand real-world functional libraries and create a functional library that mimics underscore.js
Perform pure-error handling techniques such as functors and monads
Discover ES6 functional features such as spread operators and generators
Who This Book Is For:

JavaScript developers (or beginners) who want to understand functional programming concepts and the functional nature of the language.

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Chapter 1: Functional Programming In Simple Terms
Chapter Goal: Introduce to the reader the functional programming concepts in simple English terms. The chapter is supposed to consist of theory and few executable Javascript code both in imperative terms and functional terms, thus showcasing the advantages of functional programming over imperative.

No of pages : 25

Sub -Topics

1. What is functional programming? Why it matters?

2. Functional programming thought process and its advantages.

1. Talking about side effects

2. Functions in Math and in programming

3. Immutability leads to parallel code

4. Testable

5. Easy to reason about your code.

3. Lets understand functions in Javascript

4. What we are going to build in this book?
Chapter 2: Fundamentals of Javascript functions
Chapter Goal: This chapter is sort of refresher on Javascript functions. What they are and how they can be written in es6 world etc.

No of pages : 20

Sub - Topics

1. Javascript Functions

2. Functions vs Methods in Javascript

3. Functions old way and ES6 way

4. Anonymous functions or arrow functions

5. Deep Dive. Functions Prototype.
Chapter 3: Functions === Data.
Chapter Goal: In this chapter we are going give a different thought process on how functions are treated as data in Javascript world. We will be covering what is data and how function as data allows several things possible in Javascript.

No of pages : 20

Sub - Topics:

1. Datas in Javascript

2. Functions as Data in Javascript

3. Higher order functions

3. Our first functional approach to "loop" problem
Chapter 4: Arrays
Chapter Goal: This chapter is going to create lot of functional libraries for the Arrays. The chapter explains the importance of Arrays as collections in Javascript,

No of pages : 30

Sub - Topics:

1. Arrays in Javascript

2. How to access arrays, delete, loop them etc

3. Create functional libraries using the above approaches learned.

4. Example problem and using the libraries that we created to show how functional programming helps them.

Chapter 5: Closures and Currying
Chapter Goal: This chapter introduces yet another important concepts in Javascript called closures.

No of pages: 20

Sub - Topics:

1. What all functions can see?

2. Remembering where you born.

3. Introducing Closures.

4. Using closures create a in built bind function

5. Introduce Currrying with that created function

6. Use closures create functions and add it to our functional lib

7. Show examples of the above created functions.

8. Are closures impure?
Chapter 6: Composition and Pipelines
Chapter Goal: In this chapter we are going to see how and what is compostion.

No of pages : 20

Sub - Topics:

1. What is compostion?

2. Unix philoshophy - build small things well and good

3. Creating composing function

4. Currying leads to Composition.
5. Pipelines

6. Showing examples of how to use composition

7. Category theory

Chapter 7: Functors Chapter Goal: In this chapter we are going to discuss on what Functors are and how they will be useful to us.

No of pages : 20

Sub - Topics:
1. A bit of algebra

2. Container Theory

3. First Functor

4. Adding Container functor code to our library

5. Showing examples of how to use the functors

Chapter 8: MayBe And Either Functors
Chapter Goal: In this chapter we are going to talk about these two functors in depth and create them in our functional library.

No of pages : 20

Sub - Topics:

1. Handling error handling in functional world

2. Introducing MayBe functors

3. Adding functors to our library

4. Showing examples

5. Introducing Either Functors

6. Adding Either functors to our library

7. Showing examples
8. Real world functors.

9. Other functors I/O , Promise and giving exercises.

Chapter 9: Applicative Functors
Chapter Goal: In this chapter we are going to talk about applica

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