JS Practice — Built-in Objects

toString Equals join with Comma

📖 Usage Example

const arr = [1, 2, 3]
arr.toString()  // → '1,2,3'
arr.join(',')   // → '1,2,3'  (equivalent)

toString() is equivalent to join(',') — use join() when you need a different separator.

Array.prototype.toString — Equivalence to join

arr.toString() produces the exact same result as arr.join(','). This is a useful equivalence to know when choosing between the two.

Implement verifyToString which returns true if arr.toString() strictly equals arr.join(',').

💡 Hints (2)