class Array
  def dmap(&block)
    sender = Sender.instance
    lambda = sender.prepare_lambda(&block)
    result=[]; threads =[]
    self.each_with_index{|value,index|
      threads << Thread.new() { 
        result[index] = sender.call(lambda, value)
      }
    }
    threads.each{|t| t.join}
    result
  end
  
  def aeach(&block)
    sender = Sender.instance
    lambda = sender.prepare_lambda(&block)
    threads =[]
    self.each{|value|
      threads << Thread.new() { 
        sender.call(lambda, value)
      }
    }
    threads.each{|t| t.join}
    self
  end
end