The following conventions are used in this book:
Used for file and folder names, URLs, and new terms when they are defined.
Used for code examples and the names of variables, handlers, and commands.
Used for placeholders in code, where the programmer would supply the actual name of something.
Used in code examples, for user input from the command line; often seen in conjunction with %, which symbolizes the shell prompt.
-- code comment in italic
Used in code examples, for my comments to the reader about the code or its effect.
-- code comment in bold
code comment in bold
Used in code examples, to represent the result (output) of executing the line.
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Used in syntax templates to indicate alternatives.
Used in syntax templates to indicate that something is optional.
Used to indicate a line of code that continues; these lines will be unbroken in your code but were too long to fit on the printed pages of this book.
This icon represents a tip relating to the nearby text.
This icon represents a warning relating to the nearby text.