How can I ensure that the last line of code in the loop returns a value?
$scope.runActionwithObjects = function() {
for (var i = 0; i < $scope.Objects.length; i++) {
console.log($scope.Objects[i]); //$scope is being accessed
$http.get($scope.Objects[i]["Commit"]).success(function (data) {
console.log($scope.Objects[i]);//currently returning undefined
The issue arises from the asynchronous nature of ajax requests.
By the time the success callback is triggered, your loop has already completed and the i variable has reached $scope.Objects.length.
Consider using forEach instead. This method will generate distinct closures for each item in the array.
$scope.Objects.forEach(function(currentObject){
console.log(currentObject); //$scope accessible within closure
$http.get(currentObject["Commit"]).success(function (data) {
console.log(currentObject);
});
});
The reason why the value of $scope.Objects[i] is undefined is because the variable i is constantly set to $scope.Objects.length + 1. For instance, if there are 5 elements, the value of i will be 6 because by the time the callback is executed, it already has the final value.
One way to resolve this issue is by binding the required object to the method, enabling access through this (as it is not possible to refer directly to the ref variable via closure, as it still holds the last item). For example:
for (var i = 0; i < $scope.Objects.length; i++) {
var ref = $scope.Objects[i];
// console.log($scope.Objects[i]); //$scope is accessible
var successCallback = (function (data) {
console.log(this);//return the ref
}).bind(ref);
$http.get('').success(successCallback);
}
}
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