Question

我有两个清单。一个是玩家的字符串列表，另一个是int列表，表示每个玩家的提及次数。（对于玩家列表中的每个元素，提及列表中有一个元素）。在玩家列表中有重复的玩家，例如在NumofMentions列表中有3个玩家＆＃34;玩家1＆＃34;以及5,10,13个提及的数量。我想消除重复值但保留提及次数的总和。对于前面提到的例子，我想要一个＆＃34; player1＆＃34;提及的数量为28。

最简单的方法是什么？

Answer 1

不要使用List;使用字典

var mentions = new Dictionary<string, int>();
mentions["PlayerName"] = 5;

var currentCount = mentions["PlayerName"];
mentions["PlayerName"] = currentCount + amountToAdd;

您仍然可以从Dictionary的Keys属性中获取所有玩家

foreach(var player in mentions.Keys)
{
    //do some work
}

鉴于您有四个列表，请为每个列表执行以下操作：

foreach(var playerCounter in googleQueryList)
{
   if(mentions.ContainsKey(playerCounter.Name))
   {
        //Update the player here
        var currentCount = mentions[player.Name];
        mentions[player.Name] = currentCount + playerCounter.NumOfMentions;
   }
   else
   {
        //Add the player here
        mentions[player.Name] = playerCounter.NumOfMentions;
   }
}

Answer 2

听起来你的玩家名称和价值观是相辅相成的，也许他们不应该属于2个单独的列表，而是属于班级玩家的列表。您还没有向我们展示任何代码，因此我们必须使用我们自己对您的问题的解释，但这是我将如何处理它...

public class Player
{
    public string name { get; set; }
    public int value { get; set; }
}

public void MyTest()
{
    var myList = new List<Player>
    {
        new Player { name = "Player 1", value = 5 },
        new Player { name = "Player 1", value = 10 },
        new Player { name = "Player 1", value = 13 },
        new Player { name = "Player 2", value = 3 },
        new Player { name = "Player 2", value = 4 },
        new Player { name = "Player 2", value = 6 }
    };

    var mySummedList = myList.GroupBy(x => x.name).Select(x => new Player { name = x.Key, value = x.Sum(y => y.value)});

    foreach(var val in mySummedList)
    {
        Debug.WriteLine(String.Format("{0}: {1}", val.name, val.value));
    }
}

//Output:
//Player 1: 28
//Player 2: 13

从列表中删除重复值，同时跟踪已删除的项目＆＃39;索引

2 个答案: