Class: NilClass

Inherits:
Object show all
Defined in:
object.c,
object.c

Overview

The class of the singleton object nil.

Instance Method Summary collapse

Instance Method Details

#&(obj) ⇒ false #&(obj) ⇒ false

And—Returns false. obj is always evaluated as it is the argument to a method call—there is no short-circuit evaluation in this case.



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# File 'object.c', line 993

static VALUE
false_and(obj, obj2)
VALUE obj, obj2;

#^(obj) ⇒ Boolean #^(obj) ⇒ Boolean

Exclusive Or—If obj is nil or false, returns false; otherwise, returns true.



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# File 'object.c', line 1030

static VALUE
false_xor(obj, obj2)
VALUE obj, obj2;

#inspect ⇒ Object

Always returns the string “nil”.



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# File 'object.c', line 863

static VALUE
nil_inspect(obj)
VALUE obj;

#nil? ⇒ Boolean

call_seq:

nil.nil?               => true

Only the object nil responds true to nil?.



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# File 'object.c', line 1044

static VALUE
rb_true(obj)
VALUE obj;

#to_a ⇒ Array

Always returns an empty array.

nil.to_a   #=> []



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# File 'object.c', line 849

static VALUE
nil_to_a(obj)
VALUE obj;

#to_f ⇒ 0.0

Always returns zero.

nil.to_f   #=> 0.0



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# File 'object.c', line 817

static VALUE
nil_to_f(obj)
VALUE obj;

#to_i ⇒ 0

Always returns zero.

nil.to_i   #=> 0



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# File 'object.c', line 801

static VALUE
nil_to_i(obj)
VALUE obj;

#to_s ⇒ Object

Always returns the empty string.

nil.to_s   #=> ""



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# File 'object.c', line 833

static VALUE
nil_to_s(obj)
VALUE obj;

#|(obj) ⇒ Boolean #|(obj) ⇒ Boolean

Or—Returns false if obj is nil or false; true otherwise.



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# File 'object.c', line 1010

static VALUE
false_or(obj, obj2)
VALUE obj, obj2;