from singleton to instance method

copything.rb

class Class
  def method_to_instance(*names)
    names.each{|name|
      meth = method(name)
      self.send(:define_method, name, meth.to_proc)
    }
  end
end


class Bar
  def self.bar
    "barbi"
  end
  method_to_instance :bar
end

def_both.rb

class Class
  def def_both(meth, &block)
    [:define_method, :define_singleton_method].each{|d| self.send(d, meth, block)}
  end
end

class Foo
  def_both :bar do
    "foobar!"
  end
end