Comparing objects in an Array extension causing error in Swift

Question

I\'m trying to build an extension that adds some of the convenience functionality of NSArray/NSMutableArray to the Swift Array class, and I\'m trying to add this function:

Answer 1

You were close. Here's a working extension:

extension Array {
    func indexOfObject(object:T) -> Int? {
        if self.count > 0 {
            for (idx, objectToCompare) in enumerate(self) {
                if object == objectToCompare as T {
                    return idx
                }
            }
        }
        return nil
    }
}

Swift had no way of knowing if object or objectToCompare were equatable. By adding generic information to the method, we're then in business.