report.rb

class Report
  class <<  self
  
    attr_accessor :current
    
    def store(string)
      @current ||= new
      @current.store(string)
    end
    
  end

  attr_accessor :strings

  def initialize
    @strings = []
  end

  def store(string)
    @strings << string
  end

  def deliver
    p ["Delivering ...", @strings]
    self.class.current = nil
    self
  end

end


Report.store("sdadasda")