gistfile1.rb

class Deferrable < SimpleDelegator

  # Public: Create a side thread that wraps whatever you need to have available in the future.
  def initialize(&blk)
    super(Thread.new(&blk))
  end

  # Internal: We need the result of the computation of this thread NOW, so block on it and return
  # the value.
  def __getobj__
    super.value
  end

end