Get object type from empty Swift Array

Question

Is there a way to get instance of Array element from the empty array? (I need `dynamic` properties because I use some KVC methods on `NSObject`) ``` import Foundation class BaseClass: NSObject { func myFunction() { doWork() } } class Car: BaseClass { dynamic var id: Int = 0 } class Bus: BaseClass { dynamic var seats: Int = 0 } var cars = Array() ``` What I need is a vay to get instance of empty Car object from this empty array, for example like this: ``` var carFromArray = cars.instanceObject() // will return empty Car object ``` I know that I can use: ``` var object = Array.Element() ``` but this doesn't work for me since I get array from function parameter and I don't know it's element class. I have tried to write my own type that will do this, and it works, but then I cannot mark it as `dynamic` since it cannot be represented in Objective C. I tried to write extension of Array ``` extension Array { func instanceObject() -> T? { return T() } } ``` but when I…

Accepted Answer

Swift 3: Get an empty array's element type:

```
let cars = [Car]()                    // []
let arrayType = type(of: cars)        // Array<Car>.Type
let carType = arrayType.Element.self  // Car.Type
String(describing: carType)           // "Car"
```

Get object type from empty Swift Array

Solution

Problem