使用 StreamReader 计算重复项? [英] Using StreamReader to count duplicates?

问题描述

我现在正在使用 streamreader 读取人名文件，它是一个文本文件，人名，所以显然有重复，我希望能够显示有多少人现在有相同的名字例如:

I'm using streamreader now to read a file of people names, it is a text file, of people first names, so there are obviously duplicates, and i want to be able to display how many people have the same now so for example:

josh
alex
josh
john
alex

我想说，

josh 2
alex 2
john 1

但我似乎找不到一种简单的方法来做到这一点，最简单的方法是什么，

but I can't seem to find an easy way of doing this, what would be the easiest way about doing this,

推荐答案

我想说使用 Dictionary.

Dictionary<string, int> firstNames = new Dictionary<string, int>();

foreach (string name in YourListWithNames)
{
   if (!firstNames.ContainsKey(name))
      firstNames.Add(name, 1);
   else
      firstNames[name] += 1; 
}

当然有很多不同的解决方法，但这就是我要解决的方法.我还没有运行这段代码，但我认为这会对你有所帮助.

Of course there are many different paths to a solution, but this is how I would tackle it. I haven't run this code yet, but this will help you I think.

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