C#在字符串数组中查找最常见的字符串 [英] C# Find most common strings in string array

问题描述

我有这个问题.有一个字符串

I have this one problem. There is a string

string [5] names = { "John", "Sam", "Harry", "Sam", "John" }

我需要找到数组中最常见的元素.我尝试使用:

I need to find the most common elements in the array. I tried using :

string MostCommon = names.GroupBy(v => v)
    .OrderByDescending(g => g.Count())
    .First()
    .Key;

不幸的是，它只能找到一个元素，例如MostCommon = John，在这种情况下，我不仅需要John，而且还需要Sam.我该怎么办?在这种情况下也许不需要LINQ?

Unfortunately it only finds one element, f.e., MostCommon = John, and in this case I need not only John, but Sam too. How could I do that? Maybe LINQ is not necessary in this case?

推荐答案

这可以按以下步骤完成-

This could be done as follows -

 var nameGroup = names.GroupBy(x => x);
 var maxCount = nameGroup.Max(g => g.Count());
 var mostCommons = nameGroup.Where(x => x.Count() == maxCount).Select(x => x.Key).ToArray();

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