A Guide To Functional Programming

on YouTube ↗37m

" summary

Covers how writing pure functions and using immutable values in JavaScript makes code predictable, easier to test and reuse; shows concrete fixes: replace mutating for‑loops with map/reduce, use the spread operator to avoid array mutation, and drop class components for React hooks to eliminate this binding. Demonstrates handling async work with Promise.all and observables/epics (and mentions redux‑saga) using a Google Timezone API example and a working Black Friday countdown, and explains middleware for side effects.

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" chapters (15)

1. 0:00Start
2. 1:14Basics of Functional Programming
3. 5:13Arrow Functions FTW
4. 5:43Class Components
5. 6:56Basic Structure
6. 7:31IMPURE FUNCTIONS
7. 10:21PURE FUNCTION?
8. 12:32IMMUTABLE VALUES
9. 14:03BASIC FUNCTIONS AND LOOPS
10. 14:48HIGHER ORDER FUNCTIONS
11. 16:47React Functional Component
12. 17:25Redux Reducers
13. 19:27Necessary Side Effects
14. 21:00Extracting Non-Functional Code
15. 21:56Using Middleware Functions

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