JS Practice — Built-in Objects

Map entries() — empty Map

📖 Usage Example

const m = new Map([['a', 1], ['b', 2]])
for (const [key, val] of m.entries()) {
  console.log(key, val) // 'a' 1, then 'b' 2
}

Use Map.entries() to iterate over [key, value] pairs in insertion order.

Map.prototype.entries()

entries() on an empty Map produces an empty iterator.

Challenge: Verify that spreading entries() of an empty Map gives an empty array.

💡 Hints (1)