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 include other contexts through the use of the include directive."

A block of code is set as follows:

    async.each(users, function (user, next) {
        // do something on each user object
        return next();
    }, function (err) {
        // done!
    });

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

$ node --debug leaky.js
Debugger listening on port 5858
mem. nodes: 37293
mem. nodes: 37645
mem. nodes: 37951
mem. nodes: 37991
mem. nodes: 38004

New terms and important words are shown in bold. Words that you see on the screen, for example, in menus or dialog boxes, appear in the text like this: "Now, instead of choosing Take Snapshot, just click on the Load button and choose the snapshots from your disk."