While working for an autocomplete funtionality in angularJS encountered a problem where instead of the JSON we need to iterate each element and have to make an Array of string.

For iterating the JSON data(from server side), we used:

$scope.complete = function(){
 
   WebService.getData($scope.search)
  .then(function(response){

   $scope.data = response.data.dataList;
   
            //we can use function(item) instead of function(item, index) if index number is not required
   angular.forEach($scope.data, function(item, index){
        $scope.values[index] = item.data1+","+item.data2;
      })
     
   $("#suggestion").autocomplete({ source: $scope.values });
   
  },function(error){
   console.log('error');
  });
  }

Here scope.values is array of string, where we have put all the data.