Question

可以使用C＃Linq完成吗？

例如：

彼得·派珀挑了一包腌制的辣椒，辣椒是甜蜜的，撒种为彼得，彼得思想

结果：

peter 3
peppers 2
picked 1
...

我可以使用嵌套的for循环来实现它，但我认为使用Linq有一种更简洁，资源更轻的方式。

Answer 1

您可以使用GroupBy：

string original = "peter piper picked a pack of pickled peppers, the peppers were sweet and sower for peter, peter thought";

var words = original.Split(new[] {' ',','}, StringSplitOptions.RemoveEmptyEntries);
var groups = words.GroupBy(w => w);

foreach(var item in groups)
    Console.WriteLine("Word {0}: {1}", item.Key, item.Count());

Answer 2

这应该可以解决问题：

var str = "peter piper picked a pack of pickled peppers, the peppers were sweet and sower for peter, peter thought";
var counts = str
    .Split(' ', ',')
    .GroupBy(s => s)
    .ToDictionary(g => g.Key, g => g.Count());

现在字典counts包含您句子中的字数对。例如，counts["peter"]为3。

Answer 3

"peter piper picked a pack of pickled peppers,the peppers 
were sweet and sower for peter, peter thought"
.Split(' ', ',').Count(x=>x == "peter");

是“彼得”，对其他人来说也是如此。

Answer 4

我不确定它是否更有效或“资源轻”，但你可以这样做：

string[] words = "peter piper picked a pack of pickled peppers, the peppers were sweet and sower for peter, peter thought".Split(" ");
int peter = words.Count(x=>x == "peter");
int peppers = words.Count(x=>x == "peppers");
// etc

Answer 5

const string s = "peter piper picked a pack of pickled peppers, the peppers were sweet and sower for peter, peter thought";

var wordFrequency = 
        from word in s.Split(' ')
        group word by word
        into wordGrouping
        select new {wordGrouping.Key, Count = wordGrouping.Count()};

获取文本中出现的单词数

5 个答案: