To match an optional character or sequence, use the question mark quantifier (?). : RegExp : Regular Expressions Flash / Flex / ActionScript examples

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To match an optional character or sequence, use the question mark quantifier (?).


 


package{
  import flash.display.Sprite;
  
  public class Main extends Sprite{
    public function Main(){
        var betterPhoneNumber:RegExp = /(?d{3})?-?d{3}-?d{4}/;
        trace(betterPhoneNumber.test("(703)222-1234")); //true
        trace(betterPhoneNumber.test("310-222-1515")); //true
        trace(betterPhoneNumber.test("7242229090")); //true
    }
  }
}