Here's a script I'm using to look up DNS and extract the IP address on OpenWRT:
showdns.sh
#!/bin/shregistered_ip=$(nslookup $domain 2>/dev/null | sed -n 5p | awk '{print $3}')echo $registered_ip
Include in /usr/lib/ddns/dynamic_dns_updater.sh after installing ddns-scripts
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