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Progress19 of 45
JavaScriptLow-Medium
Combine Multiple Array Iterations
Multiple `.filter()` or `.map()` calls iterate the array multiple times. Combine into one loop.
javascriptarraysloopsperformance
Code Comparison
•Incorrect (3 iterations):typescript
•Correct (1 iteration):typescript
Why This Matters
Impact: reduces iterations. This optimization is classified as LOW-MEDIUM priority for production applications.