Book Image

The Go Workshop

By : Delio D'Anna, Andrew Hayes, Sam Hennessy, Jeremy Leasor, Gobin Sougrakpam, Dániel Szabó
Book Image

The Go Workshop

By: Delio D'Anna, Andrew Hayes, Sam Hennessy, Jeremy Leasor, Gobin Sougrakpam, Dániel Szabó

Overview of this book

The Go Workshop will take the pain out of learning the Go programming language (also known as Golang). It is designed to teach you to be productive in building real-world software. Presented in an engaging, hands-on way, this book focuses on the features of Go that are used by professionals in their everyday work. Each concept is broken down, clearly explained, and followed up with activities to test your knowledge and build your practical skills. Your first steps will involve mastering Go syntax, working with variables and operators, and using core and complex types to hold data. Moving ahead, you will build your understanding of programming logic and implement Go algorithms to construct useful functions. As you progress, you'll discover how to handle errors, debug code to troubleshoot your applications, and implement polymorphism using interfaces. The later chapters will then teach you how to manage files, connect to a database, work with HTTP servers and REST APIs, and make use of concurrent programming. Throughout this Workshop, you'll work on a series of mini projects, including a shopping cart, a loan calculator, a working hours tracker, a web page counter, a code checker, and a user authentication system. By the end of this book, you'll have the knowledge and confidence to tackle your own ambitious projects with Go.
Table of Contents (21 chapters)
Free Chapter
1. Variables and Operators
2. Logic and Loops

Concurrency Patterns

The way we organize our concurrent work is pretty much the same in every application. We will look at one common pattern that is called a pipeline, where we have a source, and then messages are sent from one routine to another until the end of the line, until all the routines in the pipeline have been utilized. Another pattern is the fan out/ fan in pattern where, as in the previous exercise, the work is sent to several routines reading from the same channel. All these patterns, however, are generally made of a source stage, which is the first stage of the pipeline and the one that gathers, or sources, the data, then some internal steps, and at the end a sink, which is the final stage where the results of the process from all the other routines get merged. It is known as a sink because all the data sinks into it.

Activity 16.02: Source Files

In this activity, you will create a program that will read two files at the same time containing some numbers. You...