Book Image

Learning Go Programming

Book Image

Learning Go Programming

Overview of this book

The Go programming language has firmly established itself as a favorite for building complex and scalable system applications. Go offers a direct and practical approach to programming that let programmers write correct and predictable code using concurrency idioms and a full-featured standard library. This is a step-by-step, practical guide full of real world examples to help you get started with Go in no time at all. We start off by understanding the fundamentals of Go, followed by a detailed description of the Go data types, program structures and Maps. After this, you learn how to use Go concurrency idioms to avoid pitfalls and create programs that are exact in expected behavior. Next, you will be familiarized with the tools and libraries that are available in Go for writing and exercising tests, benchmarking, and code coverage. Finally, you will be able to utilize some of the most important features of GO such as, Network Programming and OS integration to build efficient applications. All the concepts are explained in a crisp and concise manner and by the end of this book; you would be able to create highly efficient programs that you can deploy over cloud.
Table of Contents (18 chapters)
Learning Go Programming
About the Author
About the Reviewers

The array type

As you would find in other languages, Go arrays are containers for storing sequenced values of the same type that are numerically indexed. The following code snippet shows samples of variables that are assigned array types:

var val [100]int 
var days [7]string 
var truth [256]bool 
var histogram [5]map[string]int

Notice the types that are assigned to each variable in the previous example are specified using the following type format:


The type definition of an array is composed of its length, enclosed within brackets, followed by the type of its stored elements. For instance, the days variable is assigned a type [7]string. This is an important distinction as Go's type system considers two arrays, storing the same type of elements but with different lengths, to be of different types. The following code illustrates this situation:

var days [7]string 
var weekdays [5]string 

Even though...