Implementing the Equatable protocol
In this section, we will demonstrate how we can conform to the Equatable protocol using extensions. When a type conforms to the Equatable protocol, we can use the equal-to (==) operator to compare for equality and the not-equal-to (!=) operator to compare for inequality.
If you will be comparing instances of a custom type, then it is a good idea to have that type conform to the Equatable protocol because it makes comparing instances very easy.
Let's start off by creating the type that we will compare. We will name this type Place:
struct Place {
let id: String
let latitude: Double
let longitude: Double
}
In the Place type, we have three properties that represent the ID of the place and the latitude and longitude coordinates for its location. If there are two instances of the Place type that have the same ID and coordinates, then they will be considered the same place.
To implement the Equatable...