How can I reverse an array in JavaScript without modifying the original array?

Other Questions JavaScript
1

The method Array.prototype.reverse changes the original array by reversing its elements. I’m looking for an easy way to reverse an array while ensuring that the original array remains unchanged. Is there a straightforward approach to achieve this?

2

To reverse an array in JavaScript without changing the original, you can use the slice() method combined with reverse(). Here’s a quick solution:

const originalArray = [1, 2, 3, 4, 5];
// Use slice() to copy and then reverse()
const reversedArray = originalArray.slice().reverse();

console.log(reversedArray); // Output: [5, 4, 3, 2, 1]
console.log(originalArray); // Output: [1, 2, 3, 4, 5] remains unchanged

This technique ensures the original array isn’t altered while producing a reversed version efficiently.

3

To reverse an array in JavaScript without modifying the original array, you can use the slice() method to create a shallow copy of the array and then apply the reverse() method to it.

const originalArray = [1, 2, 3, 4, 5];
const reversedArray = originalArray.slice().reverse();

console.log(reversedArray); // Output: [5, 4, 3, 2, 1]
console.log(originalArray); // Output: [1, 2, 3, 4, 5]

This approach ensures that the original array remains unaltered, maintaining its data integrity. Remember, using slice() is important here as it helps to efficiently create a new array before reversing the order.

4

To reverse an array in JavaScript without modifying the original array, you can use the slice method in combination with reverse. The slice method creates a shallow copy of the array, allowing you to reverse the order without affecting the original array.

const originalArray = [1, 2, 3, 4, 5];

// Create a new reversed array
const reversedArray = originalArray.slice().reverse();

console.log('Original array:', originalArray);
console.log('Reversed array:', reversedArray);

In this example, the slice() method is used to make a shallow copy of originalArray. Then, the reverse() method is called on this copy to reverse its elements. By doing this, originalArray remains unchanged, and the reversed result is stored in reversedArray.

5

Use the slice() method to clone the array, then apply reverse():

const originalArray = [1, 2, 3, 4, 5];
const reversedArray = originalArray.slice().reverse();
6

You can reverse an array without modifying the original by using the spread operator and the reverse() method like this:

const reversedArray = […originalArray].reverse();

7

You can reverse an array without modifying the original using the spread operator and the reverse() method:

const originalArray = [1, 2, 3, 4, 5];

const reversedArray = […originalArray].reverse();

This keeps originalArray unchanged.

8

Use the slice() method to copy the array and then reverse() it:

const originalArray = [1, 2, 3, 4, 5];
const reversedArray = originalArray.slice().reverse();

This way, originalArray stays unmodified.