The document discusses Windows 8 app development and asynchronous programming patterns in different languages and frameworks. It provides code snippets for implementing controls like FlipView and SemanticZoom in Windows apps. It also includes contact information for a developer community and blogs for Windows app development resources.
14. var data = DownloadData(...);
ProcessData(data);
var
15. Windows Runtime: IAsyncOperation<T>
.NET Framework: Task<T>
Javascript: Promises
All are objects representing ¡°ongoing operations¡±
All use callbacks to signal completion of operation
Callbacks turn your code inside out