請教正規表示式寫法

Question

各位前輩們好
                                                                               
小弟想利用正規表示式來抓取想要的字串                                                                               
但是怎麼TRY都不成功                                                                             
可以麻煩大大們幫我看看哪裡錯誤嗎?
                                                                               
問題如下:
 position = 0 type = 1 token = c
 position = 1 type = 2 token = +
 position = 2 type = 2 token = +
 position = 3 type = 4 token = 程式
 position = 7 type = 4 token = 語言
^           ^  ^  ^     ^  ^  ^        ^ ^     ^
|            |  |   |     |   |  |         | |      |
tab        |  |  tab  |   | tab       | |      ewline
            |  |         |   |            | |
         space    space        space
                                                                               
小弟想抓 [+] [+] [程式] [語言] 這六個字串                                                                               
自己霧裡看花  亂寫了一通  

 

\tposition\s=\s[0-9]+\ttype\s=\s[0-9]+\ttoken\s=\s

 

拜託各位了 感激不盡!!!

 

Answer 1

string [] s = {"\tposition = 7\ttype = 4\ttoken = 語言\r\n",

               "\tposition = 1\ttype = 2\ttoken = +\r\n",

               "\tposition = 2\ttype = 2\ttoken = +\r\n",

               "\tposition = 3\ttype = 4\ttoken = 程式\r\n",

               "\tposition = 7\ttype = 4\ttoken = 語言\r\n"

              };

foreach (string ss in s)

{

    foreach( Match m in Regex.Matches(ss, @"(\S+) = (\S+)"))

    {

        Console.Write("{0} = {1},", m.Groups[1], m.Groups[2]);

    }

    Console.WriteLine();

}

Answer 2

若如你描述的情況, 沒有比使用 Regex 搭配字串陣列更適合的了。

 

Code Snippet

 

string input = @" position = 0 type = 1 token = c
 position = 1 type = 2 token = +
 position = 2 type = 2 token = +
 position = 3 type = 4 token = 程式
 position = 7 type = 4 token = 語言";
string regFormat = @"^(\sposition\s=\s(\d)+\stype\s=\s(\d)+\stoken\s=)";
string[] seperated = Regex.Replace(input, regFormat, ",", RegexOptions.Multiline).Split(',');
foreach (string retrieved in seperated)

{

  if (!String.IsNullOrEmpty(retrieved))

    Response.Write(retrieved + ", ");

}

 

 

我把你的 pattern 稍為改了一下; 如果你對 Regex 不是很熟的話, 可以看看「[Regex] Regular Expression 初論」。

Answer 3

非常感謝兩位前輩的指導

正規表示式果然是非常實用的東西

等下來試試看