我有一个单词列表和一个句子列表。我想知道在which 中可以找到哪些句子。
下面是我的代码:
List<string> sentences = new List<string>();
List<string> words = new List<string>();
sentences.Add("Gallia est omnis divisa in partes tres, quarum unam incolunt Belgae, aliam Aquitani, tertiam qui ipsorum lingua Celtae, nostra Galli appellantur.");
sentences.Add("Alea iacta est.");
sentences.Add("Libenter homines id, quod volunt, credunt.");
words.Add("est");
words.Add("homines");
List<string> myResults = sentences
.Where(sentence => words
.Any(word => sentence.Contains(word)))
.ToList();
我需要的是一个元组列表。在句子中找到的句子和单词。
发布于 2019-06-03 19:48:32
你可以试试这种方式,
var result = from sentence in sentences
from word in words
where sentence.Contains(word)
select Tuple.Create(sentence, word);
发布于 2019-06-03 19:58:03
首先,我们必须定义什么是word。可以是字母和撇号的任意组合。
Regex regex = new Regex(@"[\p{L}']+");
其次,我们应该思考我们应该如何处理case。让我们实现不区分大小写的例程:
HashSet<string> wordsToFind = new HashSet<string>(StringComparer.OrdinalIgnoreCase) {
"est",
"homines"
};
然后我们可以使用Regex
来匹配句子中的单词,并使用Linq来查询句子:
代码:
var actualWords = sentences
.Select((text, index) => new {
text = text,
index = index,
words = regex
.Matches(text)
.Cast<Match>()
.Select(match => match.Value)
.ToArray()
})
.SelectMany(item => item.words
.Where(word => wordsToFind.Contains(word))
.Select(word => Tuple.Create(word, item.index + 1)));
string report = string.Join(Environment.NewLine, actualWords);
Console.Write(report);
结果:
(est, 1) // est appears in the 1st sentence
(est, 2) // est appears in the 2nd sentence as well
(homines, 3) // homines appears in the 3d sentence
如果你想在word、句子中使用Tuple<string, string>
,只需在最后一个Select
中将Tuple.Create(word, item.index + 1)
改为Tuple.Create(word, item.text)
发布于 2019-06-03 19:50:07
你的意思是:
IEnumerable<(string, string)> query =
from sentence in sentences
from word in words
where sentence.Contains(word)
select (sentence, word);
这给了我们:
https://stackoverflow.com/questions/56426412
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