javascript - Angular js/javascript 计算一次迭代的次数

Question

下面是我的代码，我想知道如何计算所有等于失败的 $scope.rm 的数量或 $scope.percentage < 50 的数量。

angular.forEach(result1, function (value, key) {

    $scope.percentage = (value.score * 100 / value.total).toFixed(2);

    if ($scope.percentage < 50) {
        $scope.rm = "Failed"
        $rootScope.sendmail = 0

    }else {
        $scope.rm = "Passed"
        $rootScope.sendmail = 1
    }

});

Answer 1

在 forEach 之外取一个变量并将其赋值为零

之后当你得到 $scope.rm = "Failed"时增加它

那你就不会了。该条件的循环执行

例如:

var Failedcount=0,Passedcount=0;
angular.forEach(result1, function (value, key) {

       $scope.percentage = (value.score * 100 / value.total).toFixed(2);

                    if ($scope.percentage < 50) {
                        $scope.rm = "Failed"
                        $rootScope.sendmail = 0
                        Failedcount++;

                    }else {
                        $scope.rm = "Passed"
                        $rootScope.sendmail = 1
                        Passedcount++;
                    }

                });
console.log("failed counter",Failedcount)
console.log("passed counter",Passedcount)