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

Functional programming

Functional programming is a way of programming that is not well-known in the Delphi community. It is nevertheless an interesting concept which, although it cannot be directly transplanted into Delphi code, offers insightful ideas that we can use in our programs. Before I start talking about patterns in functional programming, though, we have to answer a seemingly simple question – what is functional programming, anyway?

Functional programming is one of the programming paradigms, a way of coding that treats computing as an evaluation of mathematical functions. It is part of a bigger family called declarative programming. Declarative languages focus less on defining the flow of the program and more on describing the program logic. Think about how SQL works (indeed, SQL is a declarative language). When writing a SQL program, you tell the database what needs to be done but not how it should do it.


Some functional programming languages include F#, Scheme, Erlang, and...