10. Map, Set & Fast Lookup Tables

Problem Objective

Write a function uniqueUsers(ids) using Set to deduplicate user IDs.

Expected Terminal OutputStandard Out

Unique users: 3

[✓] Set deduplication verified (Time: 0.035s, Memory: 24.1 MB)

Execution Constraints

Implementation Checklist

Construct SetConvert to arrayLog unique array

index.jsnode 20.x (V8 Engine)

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Medium