How can I reverse an array in JavaScript without using libraries?

Question

I am saving some data in order using arrays, and I want to add a function that the user can reverse the list. I can\'t think of any possible method, so if anybo

Answer 1

It can also be achieved using map method.

[1, 2, 3].map((value, index, arr) => arr[arr.length - index - 1])); // [3, 2, 1]

Or using reduce (little longer approach)

[1, 2, 3].reduce((acc, curr, index, arr) => {
    acc[arr.length - index - 1] = curr;
    return acc;
}, []);