Swift 1.2 redeclares Objective-C method

Question

I just updated from swift 1.1 to swift 1.2 and get compiler Error:

Method \'setVacation\' redeclares Objective-C method \'setVacation:\'

Here

Answer 1

Cappy: For the Standford problem I used simply this, because it looks like the Xcode Beta simply says that the operation: (Double, Double) -> Double is the same as operation: Double -> Double, I don't know if it is a bug or not...

But the code below works, but is NOT clean :(

func performOperation(r:String? = "2", operation: (Double, Double) -> Double) {
    if operandStack.count >= 2 {
        displayValue = operation(operandStack.removeLast(), operandStack.removeLast())
        enter()
    }
}

func performOperation(operation: Double -> Double) {
    if operandStack.count >= 1 {
        displayValue = operation(operandStack.removeLast())
        enter()
    }
}