Merge Swift Array with same superclass

Question

I\'m trying to find the best way to merge Swift arrays, that are not of same type, but they have same superclass. I\'ve already read all the tutorials so I know I can use:

Answer 1

If C inherits from A then you can "upcast" an array of type [C] to an array of type [A]

array += anotherArray as [A]

Alternatively, use (tested with Swift 4)

array.append(contentsOf: anotherArray)