Book Image

Hands-On Design Patterns with Delphi

By : Primož Gabrijelčič
Book Image

Hands-On Design Patterns with Delphi

By: Primož Gabrijelčič

Overview of this book

Design patterns have proven to be the go-to solution for many common programming scenarios. This book focuses on design patterns applied to the Delphi language. The book will provide you with insights into the language and its capabilities of a runtime library. You'll start by exploring a variety of design patterns and understanding them through real-world examples. This will entail a short explanation of the concept of design patterns and the original set of the 'Gang of Four' patterns, which will help you in structuring your designs efficiently. Next, you'll cover the most important 'anti-patterns' (essentially bad software development practices) to aid you in steering clear of problems during programming. You'll then learn about the eight most important patterns for each creational, structural, and behavioral type. After this, you'll be introduced to the concept of 'concurrency' patterns, which are design patterns specifically related to multithreading and parallel computation. These will enable you to develop and improve an interface between items and harmonize shared memories within threads. Toward the concluding chapters, you'll explore design patterns specific to program design and other categories of patterns that do not fall under the 'design' umbrella. By the end of this book, you'll be able to address common design problems encountered while developing applications and feel confident while building scalable projects.
Table of Contents (18 chapters)
Title Page
Copyright and Credits
About Packt


In this chapter, we have looked into three concepts that are important to an everyday Delphi programmer but didn't find their place anywhere else in this book.

The first part of this chapter discussed the idea of programming with exceptions. We saw why exceptions were introduced to modern languages, how they should be used, and how they can be abused. We also saw how exceptions should be correctly handled in the code and what alternatives are available if we don't want to use them.

The second part discussed the debugging process. As this is a highly abstract topic, this book could only give some advice and hints that could improve that part of your programming.

The final part of this chapter focused on functional programming. This programming paradigm cannot be directly transplanted to the Delphi language, but we can still use some concepts from functional programming, such as data immutability and high-order functions, to create programs that are simple to write and to maintain.