Make Swift Assume Degrees for Trigonometry Calculations

Question

Is it possible to change a setting, property, etc in Swift for iOS so that it assumes degrees for trigonometry calculations rather than radians?

For example si

Answer 1

I'm not entirely sure why you'd want to overload the default global method, but if you must, you can provide an alternate method signature:

func sin(#degrees: Double) -> Double { // Require a parameter name for method call
    let radians: Double = degrees * (M_PI / 180) // Convert to rad
    return sin(radians) // Return result of default method call with automatic conversion
}

sin(degrees: 90) // 1.0
sin(degrees: 180) // 0.0

However, this is really an odd way of doing it, and it would make more sense to explicitly define your own method (that's what they're for), in a similar way:

func sinFromDegrees(degrees: Double) -> Double {
    let radians: Double = degrees * (M_PI / 180)
    return sin(radians)
}

sinFromDegrees(90) // 1.0
sinFromDegrees(180) // 0.0