Time for action – ID the cards

Let's revisit our card-creation code and give each card an ID number. We'll use that number to detect matches.

1. In the BuildDeck function, add this line:

      function BuildDeck()
      {
         var totalRobots:int = 4; // we've got four robots to work with
         var card:Object; // this stores a reference to a card
         var id:int = 0;
   

2. Look a little further down the code. Pass the id value to the Card class with each robot and missing body part card, and then increment the ID number:

     card = new Card("robot" + (i+1) + "Missing" + theMissingPart,
       id);
      aCards.Add(card);
            
      card= new Card("robot" + (i+1) + theMissingPart, id);
      aCards.Add(card); 
      id++;

3. Add id as a property of the Card class. Accept id as an argument in the Card class constructor function, and set the card's id instance variable to that value:

      class Card extends System.Object
      {
          var isFaceUp:boolean = false;
          var isMatched:boolean = false;
          var img:String;
   ...