BFE.dev Q23: How to Create sum() with Chained Calls in JavaScript | Smart Interview Pattern

🚀 In this video, we dive into BFE.dev Question 23: Create sum() in JavaScript — a clever interview challenge that requires understanding of closures, currying, and valueOf() overriding.

You’ll learn:

How to chain function calls like sum(1)(2)(3)

How to override valueOf() or toString() for implicit type coercion

The role of closures in preserving state between calls

Pro tips on recognizing similar interview questions

▶️ Watch now and level up your problem-solving skills.

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