JS Practice — Built-in Objects

Array.prototype.reverse() — in-place mutation

📖 Usage Example

const original = [1, 2, 3]
original.reverse()
console.log(original)  // → [3, 2, 1]  (mutated!)

reverse() mutates the original array — use toReversed() for an immutable alternative.

reverse() mutates the original array

reverse() reverses the array in place and returns a reference to the same array.

const arr = [1, 2, 3]
const result = arr.reverse()
result === arr // true — same reference

💡 Hints (2)