regex - Javascript正则表达式匹配语句

Question

我有以下示例段落:

The following is my text. My introductory line of text is the this, that and the other. My second line is much the same as before but completely different. Don't even talk about my third line of text.

我想使用正则表达式捕获以下句子:

My introductory line of text is the this, that and the other.

我的代码是:

(\bMy\sintroductory\sline\sof\stext).*(\.)

但这会获取所有 文本。我将如何捕获直到第一个句号？

Answer 1

注意区别:

(\bMy\sintroductory\sline\sof\stext)[^\.]*\.

---

只是为了非常好奇，这里有一些针对我的方法和 Piskvor 的方法的基准测试代码。

字符类方法:通过 Firefox 在我的机器上大约 550 毫秒。

var start = (new Date()).getTime();
for(var i=0;i<100000;i++){
"The following is my text. My introductory line of text is the this, that and the other. My second line is much the same as before but completely different. Don't even talk about my third line of text.".match(/(\bMy\sintroductory\sline\sof\stext)[^\.]*\./);
}
var stop = (new Date()).getTime();
alert(stop - start);

非贪婪方法:在我的机器上通过 Firefox ~650ms。

var start = (new Date()).getTime();
for(var i=0;i<100000;i++){
"The following is my text. My introductory line of text is the this, that and the other. My second line is much the same as before but completely different. Don't even talk about my third line of text.".match(/(\bMy\sintroductory\sline\sof\stext).*?\./);
}
var stop = (new Date()).getTime();
alert(stop - start);

如果可以并且愿意，请对您的时间发表评论。谢谢!

请不要发表关于微优化的意见。我只是好奇 ;)。