Question

I have a Regex in AS3. Until now it’s been working, but now I would like to disclude a phrase from the beginning. Specifically, the original was:

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

I’m trying to do something along the lines of:

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

Where

baaah

would work, but

<ahref="event:baaah

would NOT work.

Please help! What is the proper syntax to implement in my code.

Answer 1

check out this follows.

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

---

I strongly recommend : 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.