JavaScript Deep Object Comparison: Two Approaches Quiz

Implement diffKeys(a, b) that returns the keys whose VALUES differ between a and b, plus any key that exists in one object but not the other, using a JSON.stringify-per-key shortcut. Assume both inputs are JSON-safe (no Dates, Maps, or functions).

Examples

Example 1:

Input:
person1 = { name: "foo", age: 21, hobbies: 45 }
person2 = { name: "foo", age: 45, height: 175, hobbies: 45, likes: 45 }
Output: ["age", "height", "likes"]
Explanation: age has different values; height and likes exist only in person2.