Implement mapValues(obj, fn)
Write mapValues(obj, fn), like Array.prototype.map, but for an object's values, keeping the same keys. fn receives (value, key).
mapValues({ a: 1, b: 2 }, (v) => v * 10); // { a: 10, b: 20 }core8 min read
Implement mapValues(obj, fn)
Created byeLearn Core Team
Implement
Run your code to see results.
DeepFrontend Pro Challenge
Unlock All 130+ Coding Challenges
This interactive challenge requires a DeepFrontend Pro membership. Get instant access to write, execute, test, and view verified solution code directly in your browser.
✓130+ auto-graded coding challenges
✓Verified solution code & complexity
✓Unrestricted access to all 280+ topics
✓Senior/Staff interview questions & AI tutor
Regional pricing available • Instant access
Stuck? This challenge exercises: