Task Group

taskgroup.swift

// Source: https://www.avanderlee.com/concurrency/task-groups-in-swift/

let images = try await withThrowingTaskGroup(of: UIImage.self, returning: [UIImage].self) { taskGroup in
    let photoURLs = try await listPhotoURLs(inGallery: "Amsterdam Holiday")
    for photoURL in photoURLs {
        taskGroup.addTask { try await downloadPhoto(url: photoURL) }
    }

    var images = [UIImage]()

    /// Note the use of `next()`:
    while let downloadImage = try await taskGroup.next() {
        images.append(downloadImage)
    }
    return images
}