Practical Systems Programming in Go

5

Working with File I/O

In this chapter, you are going to learn how to perform file I/O operations. These play a key role in many Go applications, from reading configuration files to processing large datasets. The os, io, and bufio packages of the Go standard library provide robust tools for creating, reading, writing, and manipulating files efficiently. Whether you are dealing with text, binary data, or structured formats such as JSON or CSV, the simplicity and performance of Go make file operations straightforward. So, we are going to explore common file operations, error-handling best practices, and techniques for working with files effectively in Go, including how to read plain text files line by line, word by word, and character by character. ...