The next Delphi meetup for Singapore is scheduled to be held on 27 May. If you're interested, please provide your name, contact (email or phone).
The Delphi meetup provides an opportunity for Delphi developers to gather, and network with each other.
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