JS Practice — Built-in Objects

Generics — last<T>

📖 Usage Example

function last<T>(arr: T[]): T | undefined { return arr[arr.length - 1] }
last([1, 2, 3])   // → 3
last([])          // → undefined

last<T> returns the final element, or undefined for an empty array.

Generics: last<T>

Challenge: Implement last<T>(arr: T[]): T | undefined returning the last element.

last([1, 2, 3])  // → 3
last([])         // → undefined

💡 Hints (1)