invert a character class by using a caret (^) immediately after the open bracket ([).

 

package{
  import flash.display.Sprite;
  
  public class Main extends Sprite{
    public function Main(){
        trace("roger dodger".match(/[^oge\s]/g)); //r,r,d,d,r
    }
  }
}

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1.	Creating a Regular Expression Object
2.	Case-insensitive, you can add the i flag:
3.	To flag it to match globally and multiline, the following will work:
4.	Regular expression /\w/ is created in ActionScript
5.	Matching Using a Regular Expression Object
6.	To know whether at least one match exists.
7.	Use the exec() method.
8.	RegExp("(A\|BC)* (A);(B)* (C) (A\|B\|C)", "i")
9.	String Methods and Regular Expressions
10.	To escape a character, simply preface it with a backslash (\). This goes for the backslash character as well.
11.	Use ranges with the dash character (-), and you can have multiple ranges in one character class, as well as combine ranges with single characters
12.	Quantifiers
13.	To match an optional character or sequence, use the question mark quantifier (?).
14.	(*) quantifier matches zero or more times:

invert a character class by using a caret (^) immediately after the open bracket ([). : RegExp « Regular Expressions « Flash / Flex / ActionScript

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