AS3正则表达式不包含？

Question

我在AS3有一个正则表达式。到现在为止它一直在工作，但现在我想从一开始就排除一个短语。具体来说，原来是：

var pattern:RegExp = new RegExp(keyword,'/gi'); 

我试图做的线沿线的东西：

var pattern:RegExp = new RegExp(!'<a href=\"event:' + keyword,'/gi'); 

凡

baaah 

会的工作，但

<ahref="event:baaah 

不起作用。

请帮忙！在我的代码中实现的正确语法是什么？

Answer 1

看看下面的内容。

var myPattern:RegExp = /(?<=<a href='event:).+/; 
var str:String = "<a href='event:baaah"; 
var result:Array = myPattern.exec(str); 
trace(result[0]); //baaah 

---

我强烈建议：Regular_expression

Assertions

- foo(?=bar) Lookahead assertion. The pattern foo will only match if 
    followed by a match of pattern bar. 

- foo(?!bar) Negative lookahead assertion. The pattern foo will only 
    match if not followed by a match of pattern bar. 

- (?<=foo)bar Lookbehind assertion. The pattern bar will only match if 
    preceeded by a match of pattern foo. 

- (?<!foo)bar Negative lookbehind assertion. The pattern bar will only 
    match if not preceeded by a match of pattern foo.