Count number of decimal places in a Float (or Decimal) in Swift

Question

I want to count the number of decimal places (ignoring trailing zeros) in a Float (or NSDecimalNumber) for example:

1.45000 => 2
5.98 => 2
1.00 => 0
0.8         


        

Answer 1

What about this approach? According to Here both Float and Double are BinaryFloatingPoint. So:

public extension Numeric where Self: BinaryFloatingPoint {

    /// Returns the number of decimals. It will be always greater than 0
    var numberOfDecimals: Int {
        let integerString = String(Int(self))
        //Avoid conversion issue
        let stringNumber: String
        if self is Double {
            stringNumber = String(Double(self))
        }
        else {
            stringNumber = String(Float(self))
        }
        let decimalCount = stringNumber.count - integerString.count - 1

        return decimalCount
    }
    
}