CoreData.swift

private func loadArticles() -> [Article] {
        guard let appDelegate = UIApplication.shared.delegate as? AppDelegate else {
            return []
        }

        let context = appDelegate.persistentContainer.viewContext

        // 1
        let request: NSFetchRequest<Article> = Article.fetchRequest()

        // 2
//        request.predicate = NSPredicate(format: "title = %@", "MEDIUM")

        do {
            // 3
            let articles = try context.fetch(request)

            // 4
            articles.forEach { article in
                guard
                    let title = article.title
                else {
                    fatalError("This was not supposed to happen")
                }

                print(title)
            }

            return articles
        }  catch {
            fatalError("This was not supposed to happen")
        }

        return []
    }