Conventions

In this book, you will find a number of text styles that distinguish between different kinds of information. Here are some examples of these styles, and an explanation of their meaning.

Code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles are shown as follows: "We can load a module into our app using Node's built-in require function."

A block of code is set as follows:

var http = require('http');
http.createServer(function (request, response) {
  response.writeHead(200, {'Content-Type': 'text/html'});
  response.end('Woohoo!');
}).listen(8080);

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

var http = require('http');
var path = require('path');
http.createServer(function (request, response) {
 var lookup=path.basename(decodeURI(request.url));

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

# cp /usr/src/asterisk-addons/configs/cdr_mysql.conf.sample/etc/asterisk/cdr_mysql.conf

New terms and important words are shown in bold. Words that you see on the screen, in menus or dialog boxes for example, appear in the text like this: "The console will say foo doesn't exist, because it doesn't."