[AngularJS] ng repeat repeats more times than array length

[Erivan junior]

Hello everybody,

i have a problem and i need your help!

for example i have a object 
$scope.values= [
{group :'a',  value:1 },
{group :'a',  value:2 },
{group :'b',  value:3 },
{group :'a',  value:4 },
]

and i use the ng-if to verify if i show the group

<div> 
 ng-repeat=" val in values"
  <div ng-if="show(val.group)">  
     {{val.group}}
   </div>

   <div>  {{val.value}}</div>
 
</div>
and in controller i have function called show

var verifay = '';
$scope.show = function (val) {
  if(verify == val){
         return false;
  }else{
       verifay = val;
        return true;
  }
}

but this not work because de function show is called  more times than array 
length, anybody can help me?

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