The document discusses the author's experience with making JavaScript enjoyable through functional programming, focusing on concepts like function composition and the use of libraries like Ramda and Sanctuary. It highlights examples such as a multiplayer Pacman game and emphasizes writing safe code without null checks. The author invites readers to join a local meetup in Jakarta.

1. Makes JavaScript Fun Again
(at least for me)
by Asep Bagja Priandana
http://asep.co

2. Functional Programming?
Imperative Programming?
what’s that?

3. Case Study: Pacman style multiplayer game

4. Technology Stack

5. Let’s write declarative JavaScript

6. Why am I using Ramda?
● I would like to use Clojure, but I could not
● I’m a lazy programmer
● Easy to do functional composition

7. Basic concept: Everything is a curry!

8. Function Composition
It’s expressed as higher-order function

9. Sample 1: The Leaderboard

10. Sample 2: Room Creation

11. Sanctuary
Write safe JavaScript code without null checks.
npm install sanctuary

12. Maybe Type
Inspired from Haskell’s Data.Maybe
data Maybe a = Just a | Nothing

13. Thank you and meet me at
Lambda Jakarta Meetup
https://www.meetup.com/Lambda-Jakarta/
Froyo Framework
Ruko Barcelona, Blok E9RK, No. 1
BSD City, Tangerang Selatan