Before Delphi 8, the following code does not compile.
In Delphi 8, the following code compiles. Something to take note of if you're backporting Delphi 8 code to previous Delphi versions.
type TA = record F: Byte; end;
var O: TObject; A: TA;begin O := A;end.
Quiz
In 2017, with the release of Delphi 10.2 Tokyo, Embarcadero introduced a specialized implementation of the Observer pattern into the System.Classes unit. While it has been in the wild for 9 years, it remains a "hidden" architecture for many, primarily because it serves as the invisible engine behind LiveBindings. Other than live bindings, you can also use the Observer pattern as a way to update component settings to the Windows registry, an .ini file, or persist it elsewhere.
System.Classes