真的让我很惊讶Ruby的排序方法是否结束复制对象的地方,而不仅仅是引用？他使用的是Ruby 1.8.6 / 7.

def self.sort_events(events)
  event_sorters = Array.new(events.length) {|i| EventSorter.new(i,events[i])}
  event_sorters.sort!
  event_sorters.collect {|es| events[es.index]} 
end
 
private
 
# Class used by sort_events
class EventSorter
  attr_reader :sqn
  attr_reader :time
  attr_reader :index
 
  def initialize(index,event)
    @index = index  
    @sqn   = event.sqn
    @time  = event.time  
  end
 
  def <=>(b)
    @time != b.time ? @time <=> b.time : @sqn <=> b.sqn
  end
end