Checking if a double value is an integer - Swift

Question

I need to check if a double-defined variable is convertible to Int without losing its value. This doesn\'t work because they are of different types:

if self.         


        

Answer 1

Using @ColinE answer, I build an extension that handles when the Double cannot be converted to Int and another function that returns the Int:

extension Double {

    func isInt() -> Bool {
        guard Double(Int.min) <= self && self <= Double(Int.max) else {
            return false
        }

        return floor(self) == self
    }

    func toInt() -> Int? {
        guard Double(Int.min) <= self && self <= Double(Int.max) else {
            return nil
        }

        return Int(self)
    }
}

I hope this helps someone,

Xavi