Ruby in a Nutshell

Get full access to Ruby in a Nutshell and 60K+ other titles, with a free 10-day trial of O'Reilly.

There are also live events, courses curated by job role, and more.

Name

Pseudo-Variables

Synopsis

In addition to the variables discussed, there are also a few pseudo-variables. Pseudo-variables have the appearance of local variables but behave like constants. Assignments may not be made to pseudo-variables.

self: The receiver object of the current method
true: Value representing true
false: Value representing false
nil: Value representing “undefined”; interpreted as false in conditionals
__FILE__: The name of the current source file
__LINE__: The current line number in the source file

Get Ruby in a Nutshell now with the O’Reilly learning platform.

O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.

Start your free trial

Don’t leave empty-handed

Get Mark Richards’s Software Architecture Patterns ebook to better understand how to design components—and how they should interact.

It’s yours, free.

Get it now

Check it out now on O’Reilly

Dive in for free with a 10-day trial of the O’Reilly learning platform—then explore all the other resources our members count on to build skills and solve problems every day.

Start your free trial Become a member now