Question

有没有办法使用IEnumerable For Each - 循环来解析SortedDictionary中的多个定义？我想基本上把它用作一个简单的数据库结构。例如，假设我的字典用于旋转文章，如下所示。对于句子中的每个单词（我的字符串），我将使用同义词（我的定义）创建该字符串的新版本。这甚至是最好的选择吗？这就是我到目前为止所做的：

string testSentence = "Take it or beat it.";

List<string> allSynonyms = SynonymUtility.AlternativesOf(testSentence).ToList();
variations.AddRange(allSynonyms);


public class SynonymUtility
{
    private static readonly SortedDictionary<char, string> synonymList = new SortedDictionary<char, string>
    {
        {'but', "however"},
        {'take', "abduct, abstract, accroach"},
        {'beat', "hit, lash, punch, shake"},
        {'end', " butt, confine, cusp"};
    }

    public static IEnumerable<string> AlternativesOf(string arg)
    {
        arg = arg.ToLower();
        string[] words = arg.Split(" "));
        //END HERE I AM STUCK...
    }

正如您所看到的，我正在寻找解决方案，但我无法弄清楚如何取出每个拆分词并将其替换为词典中的每个同义词。每次尝试只会替换一个项目...所以最后会有9个句子字符串的排列。

无论如何，任何帮助都将不胜感激。

Answer 1

这解决了您的问题：

我修改了同义词词典的结构，以便值为Lists：

    private static readonly SortedDictionary<string, List<string>> synonymList 
            = new SortedDictionary<string, List<string>>
            {
                {"but", new List<string> { "however" }},
                {"take", new List<string> { "abduct", "abstract", "accroach"}},
                {"beat", new List<string> {"hit", "lash", "punch", "shake"}},
                {"end",  new List<string> {"butt", "confine", "cusp"}}
            };

输出所有替代句子的功能：

    public static IEnumerable<string> AlternativesOf(string arg)
    {
        //First of all, build up a 2d array of all your options
        var words = arg.Split(' ').Select(w=> w.ToLower()).ToList();
        var options = new List<List<string>>();

        foreach (var word in words)
        {
            if (synonymList.ContainsKey(word))
            {
                //Add the original word to the list of synonyms
                options.Add(synonymList[word]
                               .Concat(new List<string> { word }).ToList());
            }
            else
            {
                //Just use the original word only
                options.Add(new List<string> { word });
            }
        }

        //Now return all permutations of the 2d options array
        return AllPermutationsOf("", options, 0);
    }

获取所有排列的功能：

    public static IEnumerable<string> AllPermutationsOf
           (string sentence, List<List<string>> options, int count)
    {
        if (count == options.Count)
        {
            yield return sentence;
        }
        else
        {
            foreach (string option in options[count])
            {
                foreach (var childOption in AllPermutationsOf
                             (sentence + " " + option, options, count + 1))
                {
                    yield return childOption;
                }
            }
        }
    }

使用示例：

 string testSentence = "Take it or beat it.";
 var alternatives = AlternativesOf(testSentence).ToList();

        /*  Output:

            abduct it or hit it.
            abduct it or lash it.
            abduct it or punch it.
            abduct it or shake it.
            abduct it or beat it.
            abstract it or hit it.
            abstract it or lash it.
            abstract it or punch it.
            abstract it or shake it.
            abstract it or beat it.
            accroach it or hit it.
            accroach it or lash it.
            accroach it or punch it.
            accroach it or shake it.
            accroach it or beat it.
            take it or hit it.
            take it or lash it.
            take it or punch it.
            take it or shake it.
            take it or beat it. */

使用C＃置换多个字典值

1 个答案: