Although you can read this book in bed or on the beach, you will need a computer and Delphi to play with the code examples. The code was written in Delphi 10.2 Tokyo, but it should also work without a problem in the older versions. All the code was also tested with the newest version of Delphi (at the time of publishing) – Delphi 10.3 Rio.

This book does not refer to any functionality specific to the Enterprise edition of Delphi. You'll be able to test all the code with the Professional edition, or even with the Community edition.

You can download the example code files for this book from your account at www.packt.com. If you purchased this book elsewhere, you can visit www.packt.com/support and register to have the files emailed directly to you.

You can download the code files by following these steps:

1. Log in or register at www.packt.com.
2. Select the SUPPORT tab.
3. Click on Code Downloads & Errata.
4. Enter the name of the book in the Search box and follow the onscreen instructions.

Once the file is downloaded, please make sure that you unzip or extract the folder using the latest version of:

• WinRAR/7-Zip for Windows
• Zipeg/iZip/UnRarX for Mac
• 7-Zip/PeaZip for Linux

The code bundle for the book is also hosted on GitHub at https://github.com/PacktPublishing/Hands-On-Design-Patterns-with-Delphi. In case there's an update to the code, it will be updated on the existing GitHub repository.

We also have other code bundles from our rich catalog of books and videos available at https://github.com/PacktPublishing/. Check them out!

There are a number of text conventions used throughout this book.

CodeInText: Indicates code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles. Here is an example: "The project resides in a folder named adapter in the Chapter05/ directory."

A block of code is set as follows:

type
  IProducer = interface ['{8E4001F9-11EC-4C9C-BAD9-97C9601699FF}']
    function NextData: TValue;
  end;

Bold: Indicates a new term, an important word, or words that you see onscreen. For example, words in menus or dialog boxes appear in the text like this. Here is an example: "Select System info from the Administration panel."