在字符串中單詞的每一側獲取x個唯一單詞？

Question

我正在嘗試在C＃字符串中的單詞的每一側獲取x個唯一單詞。 例如方法

GetUniqueWords("she sells seashells, by the seashore. the shells she sells, are surely seashells.", "seashore", 3) 

（第一個參數是句子字符串。第二個參數是用於獲取其兩側單詞的單詞。第三個參數是要檢查的單詞數）

將返回帶有值的字符串列表：

貝殼
通過
該
炮彈
她

提前致謝。

Answer 1

不漂亮，但是為您的示例工作:-)

    private static IEnumerable<string> GetUniqueWords(string phrase, string word, int amount)
    {
        //Clean up the string and get the words
        string[] words = Regex.Split(phrase.Replace(".","").Replace(",",""),@"\s+");

        //Find the first occurrence of the desired word (spec allows)
        int index = Array.IndexOf(words,word);

        //We don't wrap around the edges if the word is the first, 
        //we won't look before if last, we won't look after, again, spec allows
        int min = (index - amount < 0) ? 0 : index - amount;
        int max = (index + amount > words.Count() - 1) ? words.Count() - 1 : index + amount;

        //Add all the words to a list except the supplied one
        List<string> rv = new List<string>();
        for (int i = min; i <= max; i++)
        {
            if (i == index) continue;
            rv.Add(words[i]);
        }

        //Unique-ify the resulting list
        return rv.Distinct();
    }
}