Swift·Practice drills 8

Drill 18: Invalid input — Concurrency

Describe what happens when the input is invalid.

Beginner 5 min read Lesson 187 of 300 Challenge included

What you will be able to do

Describe what happens when the input is invalid.

Practice task

Describe what happens when the input is invalid.

Concurrency.swiftSwift

struct LessonService {
    func load() async throws -> [Lesson] {
        try await Task.sleep(nanoseconds: 100_000_000)
        return []
    }
}

@MainActor
final class LessonsViewModel: ObservableObject {
    @Published var lessons: [Lesson] = []
    func load() async throws { lessons = try await LessonService().load() }
}

Your turn

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Easy

Describe what happens when the input is invalid.

TEXT · starter

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Next: Drill 18: Write a test — SwiftUI basics

Lesson 187 of 300 · 0% of course