Advanced Code Review & Refactoring Assistant

JavaScript function with nested loops

## Code Quality: 6/10 **Issues Found:** 1. O(n²) time complexity — nested loops can be optimized 2. Magic numbers (use named constants) 3. Missing error handling on line 12 **Refactored Version:** ```javascript const processData = (items) => { const lookup = new Map(items.map(i => [i.id, i])); return items.map(item => lookup.get(item.relatedId)); }; ``` Complexity reduced from O(n²) to O(n).