To get a Solidity contract's ABI, paste the contract into the Remix online Solidity compiler, click Compile, and click on Details. The ABI is then under the Interface panel.
This can then be directly assigned to a variable in Javascript, without any string quoting, as it is a Javascript array.
var ContractABI = [......];var ContractInstance = web3.eth.contract(ContractABI);var ContractAddr = "0x.....";contract = ContractInstance.at(ContractAddr);
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