class Object

  unless method_defined?("blank?")
    def blank?
      respond_to?(:empty?) ? !!empty? : !self
    end
  end

  unless method_defined?("present?")
    def present?
      !blank?
    end
  end

  unless method_defined?("try")
    def try(method)
      send method if respond_to? method
    end
  end

  def numeric?
    !self.to_s.match(/\A[+-]?\d+?(\.\d+)?\Z/).nil?
  end

  def palindrome?
    self.to_s.reverse == self.to_s
  end

end