What does T equals T mean in Generics

Question

I\'m studying apple\'s new language swift, and i looked at the Swift module,
and saw some generic classes have below statements:

extension ContiguousAr         


        

Answer 1

T is a reference to any type. This allows you to dynamically set a type for something... like an Array. T == T is like saying typeof(Int) == typeof(Int) in obj c