Book Image

Expert Delphi

By : Paweł Głowacki
Book Image

Expert Delphi

By: Paweł Głowacki

Overview of this book

Delphi is the most powerful Object Pascal IDE and component library for cross-platform native app development. It enables building natively compiled, blazingly fast apps for all major platforms including Android, iOS, Windows, Mac, and Linux. If you want to build server-side applications, create web services, and have clear GUIs for your project, then this book is for you. The book begins with a basic primer on Delphi helping you get accustomed to the IDE and the Object Pascal language and will then quickly move on to advanced-level concepts. Through this book, we’ll help you understand the architecture of applications and will teach you the important concepts of the FireMonkey library, show you how to build server-side services, and enable you to interact with the Internet of Things. Towards the end, you will learn to integrate your app with various web services and deploy them. By the end of the book, you will be able to build powerful, cross-platform, native apps for iOS and Android with a single code base.
Table of Contents (14 chapters)

JSON

A better format for storing favorite entries is JSON. This is currently the most popular data interchange format. Its strength is its simplicity. The JSON specification makes for an interesting read at http://json.org. With a very simple type system, JSON is able to represent complex data structures. One of the key design objectives of a JSON is to keep it simple. Most programming languages can process JSON and Object Pascal is not an exception.

There are two main ways to work with JSON in Delphi. One approach is to build an in-memory representation of JSON tree using objects from the System.JSON unit. The second approach is based on streaming and provides sequential access to JSON data. In reality, both ways have their advantages and disadvantages. Let's look at both.

JSON is a very popular format for sharing information. You have just locally downloaded a piece of...