maybe for Ruby. easier handling of nil. nil is most bothersome thing in Ruby, right?

maybe.rb

require 'singleton'

class Object
  def maybe
    if self.class == NilClass
      Maybe.instance
    else
      self
    end
  end
end

class NilClass
  def id
    nil
  end
end

class Maybe
  include Singleton

  def method_missing(m, *args, &block)
    self
  end
  def respond_to_missing?(*_)
    true
  end
  def inspect
    "maybe"
  end
  def ==(a)
    if a.class == NilClass
      true
    elsif a.class == Maybe
      true
    else
      false
    end
  end
  def id
    nil
  end
  def to_s
    ""
  end
  def to_i
    0
  end
  def to_f
    0.0
  end
  def to_a
    []
  end
  def blank?
    true
  end
end