Book Image

Delphi Cookbook, - Third Edition

By : Daniele Spinetti, Daniele Teti
Book Image

Delphi Cookbook, - Third Edition

By: Daniele Spinetti, Daniele Teti

Overview of this book

Delphi is a cross-platform integrated development environment (IDE) that supports rapid application development on different platforms, saving you the pain of wandering amid GUI widget details or having to tackle inter-platform incompatibilities. Delphi Cookbook begins with the basics of Delphi and gets you acquainted with JSON format strings, XSLT transformations, Unicode encodings, and various types of streams. You’ll then move on to more advanced topics such as developing higher-order functions and using enumerators and run-time type information (RTTI). As you make your way through the chapters, you’ll understand Delphi RTL functions, use FireMonkey in a VCL application, and cover topics such as multithreading, using aparallel programming library and deploying Delphi on a server. You’ll take a look at the new feature of WebBroker Apache modules, join the mobile revolution with FireMonkey, and learn to build data-driven mobile user interfaces using the FireDAC database access framework. This book will also show you how to integrate your apps with Internet of Things (IoT). By the end of the book, you will have become proficient in Delphi by exploring its different aspects such as building cross-platforms and mobile applications, designing server-side programs, and integrating these programs with IoT.
Table of Contents (12 chapters)

Saving space using System.Zip

Historically, Delphi contains TZCompressionStream and TZDecompressionStream to respectively compress and decompress streams of bytes using the zlib format. These classes are quite useful but are quite low-level, since it is simply a stream compressor. In this recipe, we'll use a high-level class to compress and decompress folders and files. It is quite limited in terms of possibilities (you can compress and decompress files and folders, nothing more), but it's very simple to use. Just keep in mind that this class is very specialized, so if you need a compression library to work with network protocols or on the fly with compression/decompression, don't use this. But if you need a no-brain solution to compress something, this is the way to do it.

The ZIP file format doesn't need presentation. However, a recap could be useful:

ZIP...