Object Path Lookup Recursion Challenge

Given an object and an array of keys representing a path, return the value found by following the keys through the object. If the path cannot be followed at any point, return undefined.

Function Signature

getByPath(object, path)

Parameters

• object — an object or value to traverse.
• path — an array of keys (strings or numbers) representing the lookup path.

Output

Return the value at the given path, or undefined if the path is invalid.

Constraints

• The function must use recursion.
• The input object and path must not be mutated.
• The function should accept exactly two arguments.

Examples

getByPath({user: {profile: {name: 'Ada'}}}, ['user', 'profile', 'name']) → 'Ada'
getByPath({active: true}, ['active'])                                    → true
getByPath({users: [{name: 'Ada'}]}, ['users', 0, 'name'])               → 'Ada'
getByPath({a: {b: 1}}, ['a', 'c'])                                      → undefined
getByPath({a: 1}, [])                                                    → {a: 1}

Edge Cases

• An empty path returns the input object itself.
• If the object at any point in the path is null or undefined, return undefined.