Contains Duplicate - LeetCode 217 - Blind 75 - JavaScript

🔍 What You'll Learn:

Problem Overview: Understand what the Contains Duplicate problem asks.
Brute-Force Solution: A simple approach using nested loops.
Optimized Solution: Efficiently detect duplicates with JavaScript’s Set.
Complexity Analysis: Compare time and space complexities of both methods.
💻 Code Walkthrough: Step-by-step explanation of the code with comments to help you grasp each part clearly.

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