JS Practice — Built-in Objects

Advanced — invertObject

📖 Usage Example

invertObject({ a: '1', b: '2' })   // → { '1': 'a', '2': 'b' }

invertObject swaps each key with its string value, creating the inverse mapping.

Advanced: Invert Object with Uniqueness Check

Challenge: Implement invertObject<T extends Record<string, string>>(obj: T): Record<string, keyof T> throwing if duplicate values exist.

invertObject({ a: '1', b: '2' })  // → { '1': 'a', '2': 'b' }
invertObject({ a: '1', b: '1' })  // throws

💡 Hints (1)