Class: TrueClass
Overview
*********************************************************************
The global value <code>true</code> is the only instance of class
TrueClass and represents a logically true value in
boolean expressions. The class provides operators allowing
<code>true</code> to be used in logical expressions.
Instance Method Summary collapse
-
#&(obj) ⇒ Boolean
And—Returns
false
if obj isnil
orfalse
,true
otherwise. -
#===(other) ⇒ Boolean
Case Equality – For class Object, effectively the same as calling
#==
, but typically overridden by descendants to provide meaningful semantics incase
statements. -
#^(obj) ⇒ Object
Exclusive Or—Returns
true
if obj isnil
orfalse
,false
otherwise. -
#to_s ⇒ Object
(also: #inspect)
The string representation of
true
is “true”. -
#|(obj) ⇒ true
Or—Returns
true
.
Instance Method Details
#&(obj) ⇒ Boolean
And—Returns false
if obj is nil
or false
, true
otherwise.
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# File 'object.c', line 1464 static VALUE true_and(VALUE obj, VALUE obj2) { return RTEST(obj2)?Qtrue:Qfalse; } |
#===(other) ⇒ Boolean
Case Equality – For class Object, effectively the same as calling #==
, but typically overridden by descendants to provide meaningful semantics in case
statements.
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# File 'object.c', line 131 VALUE rb_equal(VALUE obj1, VALUE obj2) { VALUE result; if (obj1 == obj2) return Qtrue; result = rb_equal_opt(obj1, obj2); if (result == Qundef) { result = rb_funcall(obj1, id_eq, 1, obj2); } if (RTEST(result)) return Qtrue; return Qfalse; } |
#^(obj) ⇒ Object
Exclusive Or—Returns true
if obj is nil
or false
, false
otherwise.
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# File 'object.c', line 1502 static VALUE true_xor(VALUE obj, VALUE obj2) { return RTEST(obj2)?Qfalse:Qtrue; } |
#to_s ⇒ Object Also known as: inspect
The string representation of true
is “true”.
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# File 'object.c', line 1449 static VALUE true_to_s(VALUE obj) { return rb_cTrueClass_to_s; } |
#|(obj) ⇒ true
Or—Returns true
. As obj 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
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# File 'object.c', line 1486 static VALUE true_or(VALUE obj, VALUE obj2) { return Qtrue; } |