$scope.reportComparisons
                        .sort((a, b) => {
                            let result;

                            if (!a.isValid) {
                                result = isAscending ? 1 : -1;
                            } else if (!b.isValid) {
                                result = isAscending ? -1 : 1;
                            } else {
                                const aAppName = a.appName.toLowerCase();
                                const bAppName = b.appName.toLowerCase();

                                result = aAppName < bAppName ? 1 : -1;

                                if (isAscending) {
                                    result *= -1;
                                }
                            }

                            return result;
                        });