The global value true
is the only instance of class TrueClass
and represents a logically true value in boolean expressions. The class provides operators allowing true
to be used in logical expressions.
true
& anObject → anObjectfalse
if anObject is nil
or
false
, true
otherwise.
true
^ anObject → !anObjecttrue
if
anObject is nil
or false
,
false
otherwise.
true
| anObject → true
true
. As anObject is an
argument to a method call, it is always evaluated; there is no
short-circuit evaluation in this case.
true | puts("or")
true || puts("logical or")
produces:
or
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/).
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