JS Practice — Built-in Objects

Interface — Tuple Type

📖 Usage Example

type Pair = [string, number]
const entry: Pair = ['age', 30]
entry[0]   // → 'age'  (string)
entry[1]   // → 30     (number)

Tuple types enforce fixed-length arrays with specific types at each position.

Tuple Types

A tuple is a fixed-length array where each position has a specific type.

Challenge: Implement createPair<T, U>(first, second) returning a [T, U] tuple.

createPair(1, 'a')   // → [1, 'a']
createPair('x', true) // → ['x', true]

💡 Hints (1)