Use ranges with the dash character (-), and you can have multiple ranges in one character class, as well as combine ranges with single characters

 

package{
  import flash.display.Sprite;
  
  public class Main extends Sprite{
    public function Main(){
        trace("abcdefghijklmnopqrstuvwxyz".match(/[a-cmx-z]/g)); //a,b,c,m,x,y,z


    }
  }
}

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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.	invert a character class by using a caret (^) immediately after the open bracket ([).
12.	Quantifiers
13.	To match an optional character or sequence, use the question mark quantifier (?).
14.	(*) quantifier matches zero or more times:

Use ranges with the dash character (-), and you can have multiple ranges in one character class, as well as combine ranges with single characters : RegExp « Regular Expressions « Flash / Flex / ActionScript

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