How do I check if an object is a collection? (Swift)

Question

I\'m extensively using KVC to build unified interface for the needs of an app. For instance, one of my functions gets an object, which undergoes several checks based solely

Answer 1

You could create another protocol

protocol CountableCollection {
    var count: Int { get }
}

extension Array: CountableCollection where Element: Any {
}

extension Dictionary: CountableCollection where Key == String, Value == Any {
}

Add all the methods that you need from Collection to the new protocol that has been created (I have added just count getter for demonstration).

---

After this you could simply do

if someVar is CountableCollection {
    print(someVar.count)
}

someVar would be true if it is an Array or Dictionary. You can also make it conform to Set if required.