Ruby in a Nutshell

Conventions Used in This Book

The following conventions are used in this book:

Italic

Used for strings to be replaced for particular value.

Constant width

Indicates command-line options; environment variable names; fragments of Ruby code, i.e., names and reserved words, including method names, variable names, class names, etc.; examples; user input.

[ ]

Text in brackets is usually optional.

...

Text followed by an ellipsis can be any number of sequences of the text.

[...] or {...}

Ellipses between brackets or braces refers to omitted text.

Tip

This icon designates a note, which is an important aside to the nearby text.

Warning

This icon designates a warning relating to the nearby text.