Question

我＆＃39;试图删除特定列出的值：

var List = new List<string> { "sun", "open", "look", "night", "cat"};

来自字符串：

string str = "hello, sunday, opening, look, midnight, cat"

像这样：

string[] inputs = str.Split(' ');
StringBuilder sbResult = new StringBuilder();
foreach (var input in inputs)
{
    if (!List.Contains(input))
    {
        sbResult.AppendFormat("{0} ", input);
    }
}
string result = sbResult.ToString().Trim();

但这种方式只适用于相同的单词，但如果列出的单词与其他单词合并则不会删除：

"hello, sunday, opening, midnight"

并且所需的输出必须是：

"hello, day, ing, mid"

我必须在这里注意两件事，我想在List中使用它来获取大约90000的值，输入字符串长约100字甚至更多

Answer 1

用一行解决方案给你的教授留下深刻印象！

string str = "hello, sunday, opening, look, midnight, cat";
var list = new List<string> { "sun", "open", "look", "night", "cat" };
list.ForEach(a => str = str.Replace(a, ""));
Console.WriteLine(str);

Answer 2

var keywordList = new List<string> { "sun", "open", "look", "night", "cat"};
string str = "hello, sunday, opening, look, midnight, cat";

var strList = str.Split(',').Select(i => i.Trim()).ToList();

foreach (var keyword in keywordList)
{
    for (int i = 0; i < strList.Count; i++)
    {
        strList[i] = strList[i].Replace(keyword, String.Empty);
    }
}

str = strList.Where(i => i != String.Empty).Aggregate((a, b) => a + ", " + b);

从字符串中删除列出的值，包括与其他人合并

2 个答案: