converting Binary, hexadecimal, decimal in swift

Question

What i really want to know is what is the quickest way of converting this in swift

• Binary to Hexadecimal
• Hexadecimal to Binary
• Binary to Decimal
• Decimal to Binary

These are the conversation i am trying to do in swift

Answer 1

Using native String and Int initializers:

extension String {
    func convertBase(from: Int, to: Int) -> String? {
        return Int(self, radix: from)
            .map { String($0, radix: to) }
    }
}

let binary = "000010001"
let decadic = binary.convertBase(from: 2, to: 10)
print(decadic)
let hexadecimal = binary.convertBase(from: 2, to: 16)
print(hexadecimal)