How to convert Data to hex string in swift

Question

I want the hexadecimal representation of a Data value in Swift.

Eventually I\'d want to use it like this:

let data = Data(base64Encoded: \"aGVsbG8gd2         


        

Answer 1

My version. It's about 10 times faster than the [original] accepted answer by Martin R.

public extension Data {
    private static let hexAlphabet = Array("0123456789abcdef".unicodeScalars)
    func hexStringEncoded() -> String {
        String(reduce(into: "".unicodeScalars) { result, value in
            result.append(Self.hexAlphabet[Int(value / 0x10)])
            result.append(Self.hexAlphabet[Int(value % 0x10)])
        })
    }
}