Question

我在AS3中有一个正则表达式。直到现在它一直在工作，但现在我想从头开始排除一个短语。具体来说，原文是：

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

我正在尝试做一些事情：

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

其中

baaah

可行，但

<ahref="event:baaah

无效。

请帮忙！在我的代码中实现的正确语法是什么。

Answer 1

请查看以下内容。

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

<强> 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.

AS3正则表达式不包含？

1 个答案: