List<string[]> 如何去重

深度拷贝 List<string[]> 到一个新的List<string[]> 中（tempList），

遍历tempList，移除原list中重复的string[],代码如下:

static void Main(string[] args)
        {
            List<string[]> list = new List<string[]>();

            list.Add(new string[]{"1","2","3"});
            list.Add(new string[] { "1","2" ,"3"});
            list.Add(new string[] { "1" });
            list.Add(new string[] { "1" });
            list.Add(new string[] { "1" });

            var tempList = new List<string[]>(list);
            if (list.Count >= 2)  //确保下标i不越界
            {
                for (int i = 1; i < tempList.Count; i++)
                {
                    if (string.Join(",", tempList[i]) == string.Join(",", tempList[i - 1]))
                    {
                        list.Remove(tempList[i]);
                    }
                }
            }

            foreach (var item in list)
            {
                string s = string.Join(",", item);
                Console.WriteLine(s);
            }
            Console.ReadKey();
        }

运行截图如下：

那么问题又来了，挖掘机技术……呸！ 如果是List<List<string[]>>的集合又该如何去重呢？

原理是一样的把List<string[]>变成字符串，装到List<string>中，根据List<sting>重复的元素的下标索引，删除原集合中重复的元素，

代码如下:

 static void Main(string[] args)
        {
            List<string[]> list = new List<string[]>();

            list.Add(new string[]{"1","2","3"});
            list.Add(new string[] { "1","2" ,"3"});
            list.Add(new string[] { "1" });
            list.Add(new string[] { "1" });
            list.Add(new string[] { "1" });

            List<string[]> list2 = new List<string[]>();
            list2.Add(new string[] { "1", "2", "3" });
            list2.Add(new string[] { "1", "2", "3" });
            list2.Add(new string[] { "1" });
            list2.Add(new string[] { "1" });
            list2.Add(new string[] { "1" });

            List<string[]> list3 = new List<string[]>();

            list3.Add(new string[] { "1", "2", "3" ,"4","5"});
            list3.Add(new string[] { "1", "2", "3" });
            list3.Add(new string[] { "1" });
            list3.Add(new string[] { "1" });
            list3.Add(new string[] { "1" });

            List<List<string[]>> superList = new List<List<string[]>>();
            //集合list和集合list2是相同的
            superList.Add(list);
            superList.Add(list2);

            superList.Add(list3);

            List<string> strList = new List<string>();
            foreach (var d in superList)
            {
                StringBuilder sb = new StringBuilder();
                foreach (var dd in d)
                {
                    string s = string.Join(",", dd);
                    sb.Append(s);
                }
                string str = sb.ToString();
                strList.Add(str); //把superList中每个子元素拼接成一条字符串放到strList中
            }

            if (strList.Count >= 2)
            {
                for (int i = 1; i < strList.Count; i++)
                {
                    if (strList[i] == strList[i - 1])
                    {
                        superList.RemoveAt(i);//根据strList中重复的字符串的下标索引，删除superList中的元素
                    }
                }
            }

            Console.WriteLine(superList.Count());
            Console.ReadKey();
        }

运行截图如下: