This is a premium problem. We're working on making it available for free soon.
Explore Free ProblemsSolutions for this premium problem will be available for free soon.
Watch expert explanations and walkthroughs
Jot down your thoughts, approach, and key learnings
Yes, variations of deep merge and recursive object traversal appear in frontend and JavaScript-focused interviews. They test understanding of recursion, object handling, and edge cases with nested data.
Recursion works well because nested objects can have arbitrary depth. By calling the merge function on inner objects, the algorithm naturally processes each level without complex iterative logic.
The optimal approach uses recursion to traverse both objects and merge keys. When both values are objects, recursively merge them; otherwise the value from the second object overrides the first. This ensures nested structures are combined correctly.
JavaScript objects or hash maps are the natural data structure for this problem. They allow efficient key lookups and easy iteration over properties while merging nested values.