Issues with premature execution of Angular JS code have been observed at times

Currently facing an issue with my code where the updateProduct() function call is happening before the forEach loop begins running on about 1 out of every 10 page loads. Not sure why this is occurring or how to solve it. Any insights on what might be causing this and how to prevent it from happening again?

I attempted using a promise, which successfully resolved the issue on around 7 out of 10 page loads. Currently, it is successful about 9 out of 10 times. It's puzzling how it manages to complete a loop before even starting.

$http.get('file.json').success(function(data) {
        $scope.products = data;
        $scope.product_map = {};
        var itemsProcessed = 0;
        $scope.products.forEach(function(item) {
            $scope.product_map[item.sku] = item;
            itemsProcessed++;
            if(itemsProcessed === $scope.products.length) {                    
                $scope.seriesId = $scope.series_map[$scope.hashTag].seriesID;
                updateProduct($scope.series_map[$scope.hashTag].products[0].sku, $scope.series_map[$scope.hashTag].products[0].image);
            }
        });
    });

Answer №1

Alright,

I recently had a situation where someone left a comment on my post but then deleted it. Surprisingly, their comment actually helped me figure out how to solve an issue I was facing. The problem I encountered involved two http.get functions that needed to complete before a for-loop could end. What happened was that the first http.get call was getting stuck and causing errors because I hadn't considered ensuring it finished before proceeding with the second one.

To resolve this issue, I implemented the following solution:

$http.get('file1.json').success(function(data) {
    $scope.series = data;
    $scope.series_map = {};    
 }).then(function successCallback(){
    $http.get('file2.json').success(function(data) {
        $scope.products = data;
        $scope.products_map = {};
        $scope.products.forEach(function(item) {
            $scope.product_map[item.sku] = item;
            itemsProcessed++;
            if(itemsProcessed === $scope.products.length) {                    
                $scope.seriesId = $scope.series_map[$scope.hashTag].seriesID;
                updateProduct($scope.series_map[$scope.hashTag].products[0].sku, $scope.series_map[$scope.hashTag].products[0].image);
            }
        });
 });

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