alias.rb

# Something you should probably know about alias...

class Parent
  def foo
    "bar"
  end

  alias :also_foo :foo
end

class Child < Parent
  def foo
    "baz"
  end
end

p = Parent.new
c = Child.new

p.foo # "bar"
p.also_foo # "bar"

c.foo # "baz"
c.also_foo # "bar" Otherwise known as "not what we were expecting"

# The docs make it pretty clear that it's copying the method,
# but the name alias makes me think that it's referencing the same method.