Swift Functional Programming - Second Edition

Conforming to the request protocol

Now, let's create a request model named TodoRequest:

struct TodoRequest: RequestProtocol {     let todoId: Int     let name: String     let description: String     let notes: String     let completed: Bool     let synced: Bool     subscript(key: String) -> (String?, String?) {         get {             switch key {             case "todoId": return (String(todoId), "todoId")             case "name": return (name, "name")             case "description": return (description, "description")             case "notes": return (notes, "notes")             case "completed": return (String(completed), "completed")             case "synced": return (String(synced), "synced")             default: return ("Cookie","test=123")             }         }     } } 

As shown in the preceding code, this struct conforms to RequestProtocol. You might wonder why ...