Print the bytes of a Data in hexadecimal

printData.swift

private func printData(_ data: Data) {
    let hexBytes = data.map { byte in
        String(format: "%02x", byte)
    }

    for (offset, hexByte) in hexBytes.enumerated() {
        let terminator: String
        switch offset % 8 {
        case 7:
            terminator = "\n"
        case 3:
            terminator = "  "
        default:
            terminator = " "
        }
        print(hexByte, terminator: terminator)
    }
    print()
}