JS Practice — Built-in Objects

Confirm New Array Reference

📖 Usage Example

const arr = [10, 20, 30]
const result = arr.with(1, 200)
result !== arr  // → true  (different reference)

with() returns a brand new array — the result and the source are distinct objects.

Array.prototype.with — New Reference

with() always returns a new array, even if the value is the same. The result is never the same reference as the original.

Implement withReturnsNew that returns true if arr.with(0, 99) !== arr.

💡 Hints (2)