Learning Functional Programming with JavaScript ES6+

Get an introduction to the evolving functional paradigms at the heart of many JavaScript frameworks and programs.

Introduction

• A functional approach to transform code
• What you should know
• Installing Node.js and npm
• Setting up the project
• Setting up the project: Hello World

1. Introductory Functional Concepts

• The goal of functional programming
• Declarative vs. imperative programming
• Immutability
• Separation of data and functions
• Object oriented to functional approach
• First-class functions
• Ensuring immutability: ESLint
• Ensuring immutability: Install ESLint
• Ensuring immutability: Finalize ESLint

2. First-Class Functions

• Arrow functions in ES6
• Functions as data
• Functions as data, continued
• Passing functions as arguments
• Returning functions
• Closure
• Implement private variable
• Higher-order functions

3. JavaScript: The Functional Parts

• JavaScript: Functional parts
• The spread operator
• Mapping
• Filtering
• Every/some
• Slicing
• Sorting
• Reducing
• Combining functions
• Challenge: Recreate the map function
• Solution: Recreate the map function

4. Advanced Functional Concepts

• Advanced functional concepts
• Currying and partial application
• Recursion
• Functions as objects
• Challenge: Recursion
• Solution: Recursion

5. Code Conversion Challenges

• Challenge: Convert array
• Solution: Convert array
• Challenge: Anagrams
• Solution: Anagrams
• Challenge: Error messages
• Solution: Error messages

Conclusion

• Next steps