Binding ArrayCollection items to vars

hi there,

 

i have arraycollection populating chart. can bind array items vars can modify?

 

         private var ratingac:arraycollection = new arraycollection([          { rating: 10 }, // [0] positive          { rating: 20 }, // [1] neutral          { rating: 60 }  // [2] negative          ]);  

 

rating variables

 private var positive:int = 0;          private var neutral:int = 0;          private var negative:int = 0; 

 

loop update arraycollection

 

   private function buildchart():void{              for(var i:int; i<newsdb.length; i++){                   if(newsdb[i].rateitem == 0){                        ratingac.additemat(); // how can add 1 value @ index[0]?                   }                   if(newsdb[i].rateitem == 1){                        neutral += 1;                   }                   if(newsdb[i].rateitem == 2){                        negative += 1;                   }                                 }         } 

is flex?

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