找到字符串C#中出现的最高单词

Question

我试图在字符串中找到最常见的单词.

例如

Hello World This is a great world, This World is simply great

从上面的字符串我试图计算结果如下:

• 世界,3
• 很棒,2
• 你好,1
• 这个,2

但忽略长度小于3个字符的任何单词,例如is两次出现的单词.

我试图调查Dictionary<key, value>对,我试图调查linq的GroupBy扩展.我知道解决方案介于两者之间,但我无法理解算法以及如何完成这项工作.

Answer 1

使用LINQ和Regex

Regex.Split("Hello World This is a great world, This World is simply great".ToLower(), @"\W+")
    .Where(s => s.Length > 3)
    .GroupBy(s => s)
    .OrderByDescending(g => g.Count())

Answer 2

因此,我会避免使用LINQ和Regex等,因为它听起来像是在试图找到一个算法,并且理解这不会使用某些函数来为您完成.

并非那些不是有效的解决方案.他们是.当然.

尝试这样的事情

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

string sInput = "Hello World, This is a great World. I love this great World";
sInput = sInput.Replace(",", ""); //Just cleaning up a bit
sInput = sInput.Replace(".", ""); //Just cleaning up a bit
string[] arr = sInput.Split(' '); //Create an array of words

foreach (string word in arr) //let's loop over the words
{
    if (word.Length >= 3) //if it meets our criteria of at least 3 letters
    {
        if (dictionary.ContainsKey(word)) //if it's in the dictionary
            dictionary[word] = dictionary[word] + 1; //Increment the count
        else
            dictionary[word] = 1; //put it in the dictionary with a count 1
     }
}

foreach (KeyValuePair<string, int> pair in dictionary) //loop through the dictionary
    Response.Write(string.Format("Key: {0}, Pair: {1}<br />",pair.Key,pair.Value));