JS Practice — Built-in Objects

Set entries() — [value, value] pairs

📖 Usage Example

const s = new Set(['a', 'b'])
for (const [key, val] of s.entries()) {
  console.log(key, val) // 'a' 'a', then 'b' 'b'
}

Use Set.entries() to iterate over [value, value] pairs; both elements are the same.

Set.prototype.entries()

For Set, entries() yields [value, value] pairs (both elements are the same value).

Challenge: Verify that each entry is [value, value].

💡 Hints (1)