This book talks about Delphi, so you need it. Not all the recipes are available in all the Delphi editions. Most of the projects, including the mobile, can be compiled with Delphi Community Edition or Professional (depending on license term) and higher, while for some server development parts, especially Linux, the Architect or Enterprise version is required. All the projects are compiled and tested with the latest Delphi version at the time of writing, but many recipes can also be compiled on older versions.

If you want to run the mobile app on a phone or a tablet, you can use the Android emulator or the iOS simulator, but we strongly suggest an actual device to see how the app really behaves. To deploy an iOS app on your device, you also need an Apple computer with MacOSX. For the development with Linux, a machine (also a Virtual Machine is okay) with the Linux OS is necessary to be installed, and for the IoT section, the reference boards are Arduino and Raspberry Pi.

You can download the example code files for this book from your account at www.packtpub.com. If you purchased this book elsewhere, you can visit www.packtpub.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.packtpub.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 latestversion 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/Delphi-Cookbook-Third-Edition. We also have other code bundles from our rich catalog of books and videos available at https://github.com/PacktPublishing/. Check them out!

We also provide a PDF file that has color images of the screenshots/diagrams used in this book. You can download it here: https://www.packtpub.com/sites/default/files/downloads/DelphiCookbookThirdEdition_ColorImages.pdf.

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: "When we selected the Iceberg Classico style as the default style, the Delphi IDE added a line just before the creation of the main form, setting the default style for all the applications using TStyleManager.TrySetStyle static methods."

A block of code is set as follows:

begin 
  Application.Initialize; 
  Application.MainFormOnTaskbar := True; 
  TStyleManager.TrySetStyle('Iceberg Classico'); 
  Application.CreateForm(TMainForm, MainForm); 
  Application.Run; 
end

Any command-line input or output is written as follows:

$ systemctl disable unit

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: "If you want to open a separate Terminal window for running and debugging your application, you have to enable the Use Launcher Application checkbox (you can find it in Project | Options | Debugger)."