Write a function `deepEqual(a, b)` that performs a deep comparison of two values (objects, arrays, primitives).

💡 Hint 1: Handle primitives first with strict equality. 💡 Hint 2: For objects/arrays, compare keys and recurse on values. 💡 Hint 3: Check same type, same number of keys, then recursively compare each key value pair. ✅ Solution: ```javascript function deepEqual(a, b) { if (a === b) return true; if (a == null || b == null) return false; if (typeof a !== typeof b) return false; if (typeof a !== "object") return false; const keysA = Object.keys(a); const keysB = Object.keys(b); if (keysA.length !== keysB.length) return false; return keysA.every(key => deepEqual(a[key], b[key])); } ```