Day 12: Mastering JavaScript — Implement a Once-Call Function with LeetCode

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I’m on a mission to master JavaScript, and I’m bringing you along for the journey. Join me as I tackle daily LeetCode challenges and share my coding adventures with you.

Day 12 of JavaScript on LeetCode: Today, I solved a fascinating problem involving function behavior:

Problem: Given a function fn, return a new function that is identical to the original but ensures fn is called at most once. The first call returns the result of fn, while subsequent calls return undefined.

🔍 In This Video:

Breakdown of the problem and solution
Step-by-step implementation
Tips on managing function calls and side effects
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