The class of the singleton object nil
.
nil
& anObject → false
false
. As anObject is an
argument to a method call, it is always evaluated; there is no
short-circuit evaluation in this case.
nil && puts("logical and")
nil & puts("and")
produces:
and
nil
^ anObject → true
or false
false
if anObject is nil
or
false
,
true
otherwise.
nil
| anObject → true
or false
false
if anObject is
nil
or false
, true
otherwise.
nil
.nil? → true
true
.
nil
.to_a → []nil
.to_i → 0nil
.to_s → ""Extracted from the book "Programming Ruby - The Pragmatic Programmer's Guide"
Copyright © 2001 by Addison Wesley Longman, Inc. This material may be distributed only subject to the terms and conditions set forth in the Open Publication License, v1.0 or later (the latest version is presently available at http://www.opencontent.org/openpub/).
Distribution of substantively modified versions of this document is prohibited without the explicit permission of the copyright holder.
Distribution of the work or derivative of the work in any standard (paper) book form is prohibited unless prior permission is obtained from the copyright holder.