我这样说:
arc boat arc ship arc ship ship arc boat arc
并且我需要找到第一个“船只”指数。
C#中满足这一条件的最有效方式是什么?
如果你在以下几个方面立即表示:
myString.IndexOf("boat arc") + 5;
str.IndexOf("arc", str.IndexOf("boat"));
尊敬的朋友
Regex reg = new Regex(@".*?boats*?(?=arc)");
Match match = reg.Match("arc boat arc ship arc ship ship arc boat arc");
int index = match.Length;
您可使用这一定期表达方式:
^(arcsboat)
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