In this video, we deep dive into the JavaScript Array reduce() method — one of the most powerful and advanced array methods.
🔹 What is reduce()?
🔹 How reduce() works internally
🔹 Why and when we use reduce()
🔹 Real world use cases (sum, flatten array, count occurrences, etc.)
🔹 Polyfill of reduce() — build your own reduce function!
reduce() takes an array and reduces it to a single value (number, object, array... anything!).
This method is unavoidable in functional programming and is very commonly asked in JavaScript interviews.
✅ After watching this video, you will:
- Understand how reduce() works step-by-step
- Know when to use reduce()
- Write your own polyfill for reduce()
- Use reduce() in real-world scenarios
Playlist - https://youtube.com/playlist?list=PLrJ-e9wsoQTHDIkqHrv1jtc_Uh_fB5Qbz&si=qWDvADFpkymid7xK
forEach - https://youtu.be/YXUkewmnue8?si=HXxP613uG_bBkvQh
map - https://youtu.be/hqQ6IrhcdN4?si=Z7C4Mwsohz2jkxBV
filter - https://youtu.be/B6W9TTT3A9g?si=CeDnmSj2Corr32ON
reduce - https://youtu.be/KpUwhSxglLk?si=qetz0MmsZMaN0ACO
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