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instance method

Object#kind_of?

obj.kind_of?(class) → true or false

VALUE
rb_obj_is_kind_of(VALUE obj, VALUE c)
{
    VALUE cl = CLASS_OF(obj);

    c = class_or_module_required(c);
    return class_search_ancestor(cl, RCLASS_ORIGIN(c)) ? Qtrue : Qfalse;
}

Returns true if class is the class of obj, or if class is one of the superclasses of obj or modules included in obj.

Example

module M;    end
class A
  include M
end
class B < A; end
class C < B; end

b = B.new
b.is_a? A          #=> true
b.is_a? B          #=> true
b.is_a? C          #=> false
b.is_a? M          #=> true

b.kind_of? A       #=> true
b.kind_of? B       #=> true
b.kind_of? C       #=> false
b.kind_of? M       #=> true

See also #itself #method #is_a? #methods also in 4.1 · 4.0 · 3.4 · 3.3 · 3.2 · 3.1

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