Book Image

Go Design Patterns

By : Mario Castro Contreras
Book Image

Go Design Patterns

By: Mario Castro Contreras

Overview of this book

Go is a multi-paradigm programming language that has built-in facilities to create concurrent applications. Design patterns allow developers to efficiently address common problems faced during developing applications. Go Design Patterns will provide readers with a reference point to software design patterns and CSP concurrency design patterns to help them build applications in a more idiomatic, robust, and convenient way in Go. The book starts with a brief introduction to Go programming essentials and quickly moves on to explain the idea behind the creation of design patterns and how they appeared in the 90’s as a common "language" between developers to solve common tasks in object-oriented programming languages. You will then learn how to apply the 23 Gang of Four (GoF) design patterns in Go and also learn about CSP concurrency patterns, the "killer feature" in Go that has helped Google develop software to maintain thousands of servers. With all of this the book will enable you to understand and apply design patterns in an idiomatic way that will produce concise, readable, and maintainable software.
Table of Contents (17 chapters)
Go Design Patterns
About the Author
About the Reviewer
Customer Feedback

Strategy design pattern

The Strategy pattern is probably the easiest to understand of the Behavioral patterns. We have used it a few times while developing the previous patterns but without stopping to talk about it. Now we will.


The Strategy pattern uses different algorithms to achieve some specific functionality. These algorithms are hidden behind an interface and, of course, they must be interchangeable. All algorithms achieve the same functionality in a different way. For example, we could have a Sort interface and few sorting algorithms. The result is the same, some list is sorted, but we could have used quick sort, merge sort, and so on.

Can you guess when we used a Strategy pattern in the previous chapters? Three, two, one... Well, we heavily used the strategy pattern when we used the io.Writer interface. The io.Writer interface defines a strategy to write, and the functionality is always the same--to write something. We could write it to the standard out, to some file or...