Reactive errors, or Retry dialog in one line of code

In this talk, we will:

• examine a typical task with a Retry dialog;
• discuss the classical solutions and their drawbacks;
• find a pragmatic solution (and, while we're at it, find out what reactive programming is — it's not RxJava, by the way);
• look at the output and turn it into a general solution to handle any errors in an app;
• discuss the final results.