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 use the d3.text function and parse the dataset on our own."

A block of code is set as follows:

var lines = data.split(/\n/g)
  .map(function(line){
    return line.split(/[-"]/g);
  });

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

// Parsing strings to numbers
var i = parseInt("5.0", 10);
var f = parseFloat("3.8");

// Short notation
var s = "932.2";
var j = +s;

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

bower install d3

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: "As we can see in the following figure, the test passes and Karma shows a green SUCCESS status."

Note

Warnings or important notes appear in a box like this.

Tip

Tips and tricks appear like this.