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

Working with the io package

The obvious place to start with IO is, well, the io package ( As we have already seen, the io package defines input and output primitives as the io.Reader and io.Writer interfaces. The following table summarizes additional functions and types, available in the io package, that facilitate streaming IO operations.




The io.Copy function (and its variants io.CopyBuffer and io.CopyN) make it easy to copy data from an arbitrary io.Reader source into an equally arbitrary io.Writer sink as shown in the following snippet:

data := strings.NewReader("Write   me down.")   
file, _ := os.Create("./")   
io.Copy(file, data)

PipeReader PipeWriter

The io package includes the PipeReader and PipeWriter types that model IO operations as an in-memory pipe. Data is written to the pipe's io.Writer and can independently be read at the pipe's io.Reader. The following...