Book Image

The Go Workshop

By : Delio D'Anna, Andrew Hayes, Sam Hennessy, Jeremy Leasor, Gobin Sougrakpam, Dániel Szabó
5 (2)
Book Image

The Go Workshop

5 (2)
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
1. Variables and Operators
2
2. Logic and Loops

Interface

An interface is a set of methods that describe the behavior of the data type. Interfaces define the behavior(s) of the type that must be satisfied to implement that interface. A behavior describes what that type can do. Almost everything exhibits certain behavior. For example, a cat can meow, walk, jump, and purr. All of those are behaviors of a cat. A car can start, stop, turn, and speed up. All of those are behaviors of a car. Similarly, behaviors for types are called methods.

Note

The definition that the https://packt.live/2qOtKrd provides is "Interfaces in Go provide a way to specify the behavior of an object."

There are several ways to describe an interface:

  • A collection of method signatures is methods with only the name of the method, its arguments, types and a return type. This is an example of a collection of method signatures for the Speaker{} interface:
    type Speaker interface{
    Speak(message string) string
    Greet() string
    }
  • Blueprints...