| The following is a list of the typographical conventions used in this book: Italics -
Used to indicate URLs, filenames, filename extensions, and directory/folder names. For example, a path in the filesystem will appear as /Developer/Applications,. Constant width -
Used to show code examples, the contents of files, and console output, as well as the names of variables, commands, and other code excerpts. Constant width bold -
Used to highlight portions of code, typically new additions to old code. Constant width italic -
Used in code examples and tables to show sample text to be replaced with your own values. Gray type -
Used to indicate a cross-reference within the text. You should pay special attention to notes set apart from the text with the following icons: | This is a tip, suggestion, or general note. It contains useful supplementary information about the topic at hand. |
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| This is a warning or note of caution, often indicating that your money or your privacy might be at risk. |
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The thermometer icons, found next to each hack, indicate the relative complexity of the hack: beginner moderate expert |