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多级阿雷米斯开采
原标题:Multi Level ArrayList extraction
  • 时间:2009-12-01 22:29:49
  •  标签:
  • c#
  • arraylist

我有一架载有“强硬”的ArrayList,并载有其他可能含有“强硬”或甚至更多的ArrayList。

从这个多层次的阿雷拉派分子中抽取所有力量是否简单?

我假定会再次入侵,但我没有能够工作。

最佳回答
public static ArrayList FlattenList(ArrayList list) {
   ArrayList l = new ArrayList(); 
   FillList(list, l);
   return l;
}
private static void FillList(ArrayList source, ArrayList listToFill) {
   foreach (object o in source) {
      ArrayList l = o as ArrayList;
      if (l != null)
          FillList(l, listToFill);
      else
          listToFill.Add(o);
   }
}
问题回答

作为一种替代办法,如果你能够使用通用和代用集团,就有可能采用单一方法:

    public static IEnumerable<string> GetStrings(ArrayList list)
    {
        foreach(var item in list)
        {
            var @string = item as string;
            if (@string != null)
                yield return @string;

            var nestedList = item as ArrayList;
            if(nestedList == null) 
                continue;

            foreach (var childString in GetStrings(nestedList))
                yield return childString;
        }
    }




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