Observing an array for changes and calling a function when it does:
$scope.$watch(
$scope.aQuestions,
function checkQuestionCount(newValue, oldValue) {
debugger;
if (newValue === oldValue) {
return;
}
else getQuestions();
});
In this piece of code, $scope.aQuestions represents an array.
However, when I execute this code, newValue and oldValue are showing as undefined.
It is important to
$scope.$watch("aQuestions",
Alternatively, you can use
$scope.$watch(function (){
return $scope.aQuestions;
},
Angular requires this method to continuously monitor the value.
In the original implementation, only the array value (undefined) is passed in. As a result, when the value changes, Angular is unaware due to lack of reference to the array.
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