🔁 RingCentral – Round 2: Implement `JSON.stringify()` from scratch

Q: Recreate JSON.stringify() — convert JS values to JSON strings.

What to cover:

• Primitives: null, boolean, number, string.
• Objects & arrays (recursive traversal).
• Skip functions & undefined where appropriate.
• Circular references → throw TypeError.

💻 Try it + solutions:

🔗 https://replit.com/@318097/Ring-Central-R2-Implement-JSONstringify#index.js