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Mastering Delphi Programming: A Complete Reference Guide

You're reading from   Mastering Delphi Programming: A Complete Reference Guide Learn all about building fast, scalable, and high performing applications with Delphi

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Product type Course
Published in Nov 2019
Publisher Packt
ISBN-13 9781838989118
Length 674 pages
Edition 1st Edition
Languages
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Author (1):
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Primož Gabrijelčič Primož Gabrijelčič
Author Profile Icon Primož Gabrijelčič
Primož Gabrijelčič
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Toc

Table of Contents (19) Chapters Close

Preface 1. About Performance FREE CHAPTER 2. Fixing the Algorithm 3. Fine-Tuning the Code 4. Memory Management 5. Getting Started with the Parallel World 6. Working with Parallel Tools 7. Exploring Parallel Practices 8. Using External Libraries 9. Introduction to Patterns 10. Singleton, Dependency Injection, Lazy Initialization, and Object Pool 11. Factory Method, Abstract Factory, Prototype, and Builder 12. Composite, Flyweight, Marker Interface, and Bridge 13. Adapter, Proxy, Decorator, and Facade 14. Nullable Value, Template Method, Command, and State 15. Iterator, Visitor, Observer, and Memento 16. Locking Patterns 17. Thread pool, Messaging, Future and Pipeline 18. Other Books You May Enjoy

Summary

This chapter provided an overview of four behavioral patterns. All of the patterns in this group help you to organize complex systems into well-behaved maintainable structures.

We opened up with a null object pattern. This simple pattern allows us to remove if assigned(object) tests from the code and replace them with a special do-nothing null version of the object. Although the concept behind this pattern is simple, the pattern itself can be very useful.

Next, we looked at the template method pattern. This pattern explains how to use object-oriented programming to design extensible and adaptable algorithms. We also demonstrated how we can solve such problems by using the concepts that were developed after the Gang of Four times.

The command pattern helps with organizing action-based programming. It tells us how to systematically convert actions...

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