使用LINQ计算集合中的单词

我有一个StringCollection对象，其中包含5个单词。 其中3个是重复的单词。 我正在尝试创建一个LINQ查询，该查询将计算集合中有多少个唯一单词并将它们输出到控制台。 所以，例如，如果我的StringCollection有’House’，’Car’，’House’，’Dog’，’Cat’，那么它应该输出如下：

房子 - > 2
车 - > 1
狗 - > 1
猫 - > 1

有关如何创建LINQ查询的任何想法吗？

Answer 1

请尝试以下方法

var res = from word in col.Cast() group word by word into g select new { Word = g.Key, Count = g.Count() }; 

Answer 2

 var xs = new StringCollection { "House", "Car", "House", "Dog", "Cat" }; foreach (var g in xs.Cast() .GroupBy(x => x, StringComparer.CurrentCultureIgnoreCase)) { Console.WriteLine("{0}: {1}", g.Key, g.Count()); } 

Answer 3

鉴于您正在使用StringCollection并想要忽略大小写，您需要将Enumerable.GroupBy与Enumerable.Cast一起使用：

 var results = collection.Cast.GroupBy( i => i, (word, words) => new { Word = word, Count = words.Count() }, StringComparer.CurrentCultureIgnoreCase ); foreach(var wordPair in results) Console.WriteLine("Word: \"{0}\" - Count: {1}", wordPair.Word, wordPair.Count); 

Answer 4

要构建单个字符串值结果…

 var stringCollection = new[] { "House", "Car", "house", "Dog", "Cat" }; var result = stringCollection.Cast().GroupBy( k => k, StringComparer.InvariantCultureIgnoreCase) .Select(v => v.Key + " -->" + v.Count()) .Aggregate((l,r)=>l+" " + r); //result = "House -->2 Car -->1 Dog -->1 Cat -->1" 

将每个值放在不同的行上……

 var stringCollection = new[] { "House", "Car", "house", "Dog", "Cat" }; var result = stringCollection.Cast().GroupBy( k => k, StringComparer.InvariantCultureIgnoreCase); foreach (var value in result) Console.WriteLine("{0} --> {1}", value.Key, value.Count()); 

Answer 5

 foreach(var g in input.GroupBy(i => i.ToLower()).Select(i => new {Word = i.Key, Count = i.Count()}) { Console.WriteLine(string.Format("{0} -> {1}", g.Word, g.Count)); } 

Answer 6

应该如此简单：

 Console.WriteLine(stringCollection.Distinct().Count()); 

Answer 7

 var query = from s in Collection group s by s.Description into g select new {word = g.Key, num = g.Count()};