Conventions used

There are a number of text conventions used throughout this book.

CodeInText: Indicates code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles. Here is an example: "In the bin folder, create a file called dynamic_json.rs."

A block of code is set as follows:

let s = "Hello".to_string();
println!("s: {}", s);
let s = String::from("Hello");
println!("s: {}", s);

When we wish to draw your attention to a particular part of a code block, the relevant lines or items are set in bold:

let alphabet: Vec<_> = (b'A' .. b'z' + 1) // Start as u8
.map(|c| c as char)            // Convert all to chars
.filter(|c| c.is_alphabetic()) // Filter only alphabetic chars
.collect(); // Collect as Vec<char>

Any command-line input or output is written as follows:

name abraham
age 49
fav_colour red
hello world
(press 'Ctrl Z' on Windows or 'Ctrl D' on Unix)

Bold: Indicates a new term, an important word, or words that you see onscreen. For example, words in menus or dialog boxes appear in the text like this.

Warnings or important notes appear like this.

Tips and tricks appear like this.