How to reverse array in Swift without using “.reverse()”?

Question

I have array and need to reverse it without Array.reverse method, only with a for loop.

var names:[String] = [\"Apple\", \"Microsof         


        

Answer 1

There's also stride to generate a reversed index:

let names = ["Apple", "Microsoft", "Sony", "Lenovo", "Asus"]

var reversed = [String]()

for index in (names.count - 1).stride(to: -1, by: -1) {
    reversed.append(names[index])
}

It also works well with map:

let reversed = (names.count - 1).stride(to: -1, by: -1).map { names[$0] }

Note: stride starts its index at 1, not at 0, contrary to other Swift sequences.

However, to anyone reading this in the future: use .reverse() instead to actually reverse an array, it's the intended way.