Question

Closed. This question needs details or clarity. It is not currently accepting answers.

想要改进这个问题吗? 添加细节,并通过

我收到一条像这样的绳子:

"????log L 05/27/2012 - 08:02:57: "Acid<1><STEAM_ID_PENDING><CT>" say "password somepass"
"

如何从此字符串获取 somemas pass ?

Answer 1

string test = "????log L 05/27/2012 - 08:02:57: "Acid<1><STEAM_ID_PENDING><CT>" say "password somepass"
";
string[] array = test.Split( " ); ;
Console.WriteLine(array[3].Split(   ).Last());  //somepass

或者:

string password = string.Empty;

for (int i = 0; i < test.Length - 8; i++)
     if (test.Substring(i, 8) == "password")
          for (int j = i + 8; test[j] !=  " ; j++)
               if (test[j] !=    )
                   password += test[j];

Console.WriteLine(password); //somepass

我对 bkuckley 给出的答案很感兴趣, 所以我用这三种方法做了一个基准来获取 “omepass” , 使用这个代码:

string test = "????log L 05/27/2012 - 08:02:57: "Acid<1><STEAM_ID_PENDING><CT>" say "password somepass"
";

Stopwatch timer = new Stopwatch();
timer.Start();

for (int n = 0; n < 10000000; n++)
{
     string[] array = test.Split( " );
     string password = array[3].Split(   ).Last(); //somepass
}

timer.Stop();
TimeSpan time = timer.Elapsed;
Console.WriteLine(String.Format("{0:00}:{1:00}:{2:00}", time.Minutes, time.Seconds, time.Milliseconds / 10));

timer.Reset();
timer.Start();

for (int n = 0; n < 10000000; n++)
{
    string password = string.Empty;
    for (int i = 0; i < test.Length - 8; i++)
         if (test.Substring(i, 8) == "password")
             for (int j = i + 8; test[j] !=  " ; j++)
                 if (test[j] !=    )
                      password += test[j]; 
} //somepass

timer.Stop();
time = timer.Elapsed;
Console.WriteLine(String.Format("{0:00}:{1:00}:{2:00}", time.Minutes, time.Seconds, time.Milliseconds / 10));

timer.Reset();
timer.Start();

for (int n = 0; n < 10000000; n++)
{
    string resultString = null;
    Regex regexObj = new Regex(@"""password (.*?)\""\n\0""");
    resultString = regexObj.Match(test).Groups[1].Value; //somepass
}

timer.Stop();
time = timer.Elapsed;
Console.WriteLine(String.Format("{0:00}:{1:00}:{2:00}", time.Minutes, time.Seconds, time.Milliseconds / 10));

结果为 ( snapshot) :

""https://i.sstatic.net/5VazR.png" alt="此处输入图像描述"/"

我可以得出这样的结论,在这种情况下,使用 Split () 方法(是 <%%475_/strong>)比使用 Regex 方法快。

Answer 2

您想要的匹配是第一组

"password (.*?)\"\n\0"

在C##中,这变成

string resultString = null;

Regex regexObj = new Regex(@"""password (.*?)\""\n\0""");

resultString = regexObj.Match(subjectString).Groups[1].Value;

友情链接