gistfile1.rb

class Queue
  @@jobs = []

  def self.enqueue(klass, *arguments)
    @@jobs << { :class => klass, :arguments => arguments }
  end

  def self.work
    while job = @@jobs.shift
      puts job[:class].perform(*job[:arguments])
    end
  end
end

class MyJob
  def self.perform(numbers)
    numbers.reduce(:+)
  end
end

Queue.enqueue(MyJob, [ 1, 2, 3, 4, 5 ])
Queue.enqueue(MyJob, [ 6, 7, 8, 9, 10 ])

Queue.work