Rust Programming Cookbook

How to do it...

We can read files from disk in just a few steps:

1. Since the Rust standard library comes with all of the basics we need, let's dive directly into src/main.rs to add the imports there:

use std::fs::{self, File};use std::io::{self, BufRead, BufReader, BufWriter, Read, Seek, Write};use std::path::Path;const TEST_FILE_NAME: &str = "lorem.txt";

2. First, let's take care of reading from files. For that, we create a function called read() that reads and extracts the contents from the prepared file, lorem.txt, underneath the imports:

fn read() -> io::Result<()> {    let path = Path::new(TEST_FILE_NAME);    let input = File::open(path)?;    let buffered = BufReader::new(input);    let words: Vec<usize> = buffered        .lines() .map(|line| line.unwrap().split_ascii_whitespace().count()) ...