Introduction

We could say that structures are something similar to classes. They store values with attributes, and they have initializers and methods. But their usage is a bit different. The idea of structs in Swift came from Objective-C, which by itself was using the C struct.

We will also use generics, so we can create generic containers. The idea of generics is not new; other languages such as C++ and Java already had it. However, this feature didn't exist in Objective-C, so the programmer was responsible for casting the retrieved data and as a consequence of this, the code was unsafe.