How could i convert with an extension of NumberFormatter a String to a Float

Question

I have created an extension of NumberFormatter and binaryInteger, to convert Int to String with a space between thousands like thise: 11111 -> 11 111 Now, in another place, i need to reverse the convertion from a specific string to a Float , like this: 11 111 -> 11111.

Here is the first extensions of NumberFormatter and BinaryInteger:

extension Formatter {
    static let withSeparator: NumberFormatter = {
        let formatter = NumberFormatter()
        formatter.groupingSeparator = " "
        formatter.allowsFloats = true
        formatter.numberStyle = .decimal
        return formatter
    }()
}

extension BinaryInteger {
    var formattedWithSeparator: String {
        return Formatter.withSeparator.string(for: self) ?? ""
    }
}

So, how could i code an another extension, to make the reverse process? thank you.

Answer 1

Try this:

extension String {
    func backToFloat() -> Float {
      // Make a copy of original string
      var temp = self

      // Remove spaces
      temp.removeAll(where: { $0 == " " })

      return Float(temp) ?? 0.0
    }
}

print("1 234 567.2".backToFloat())
// log: 1234567.2

To enable Float -> String and Double -> String:

extension FloatingPoint {
    var formattedWithSeparator: String {
        return Formatter.withSeparator.string(for: self) ?? ""
    }
}

print(12345678.12.formattedWithSeparator)
// log: 12 345 678.12