The following conventions are used in this book:
Used for source code listings and reference of class, variable, parameter names, and such referring to code snippets.
Constant width in bold
Indicates source code that was modified to illustrate an improvement to a previously presented source code listing.
Used when referring to URLs, filenames, file extensions, and to put emphasis on technical terms the first time they are cited in a chapter.
This icon indicates a tip or a suggestion.
This icon represents a notice or warning.
This icon illustrates that a section of text can be skipped and is provided only to offer some depth to a topic but is not essential to its understanding.