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getValue($scope.selectedItem.key,$scope.trendValues);
is run before the callback inside TrendChartFactory
is run.
You need to put this instruction inside it.
TrendChartFactory.get( {
Item: $scope.selectedItem.key,
puItem: $scope.puName},function(data){
$scope.trendValues = data;
console.log($scope.trendValues);
getValue($scope.selectedItem.key,$scope.trendValues);
});
Source:stackexchange.com