call parent class method without super()
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class A; def a() 42 end end
class B < A; def a() 24 end end
class B
def b # call A#a => 42, instead of 24 from B#a
self.class.superclass.instance_method(:a).bind(self).call
# self.class => B
# B.superclass => C
# C.instance_method(:a) => unbound_method(:a), can not `call'
# unbound_method(:a).bind(self) => method(:a), can be `call' now
end
end
p B.new.b
Ruby
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