javascript - 如何在 Angular JS 中使用数组？

Question

我已经在 Angular JS 中初始化了数组:

$scope.formData.universitySelected = [];

我尝试在循环中填充数组:

 angular.forEach($scope.formData.university, function (value, key) {
    if (typeof value === 'object') {
         $scope.formData.universitySelected[key].id = value.IdEducation;
    } else {
        $scope.formData.universitySelected[key].selected = value;
    }
});

但是我得到错误:

Cannot set property 'id' of undefined

Answer 1

您应该在使用之前创建一个对象。

angular.forEach($scope.formData.university, function (value, key) {
   $scope.formData.universitySelected[key] = $scope.formData.universitySelected[key] || {};
   if (typeof value === 'object') {
      $scope.formData.universitySelected[key].id = value.IdEducation;
   } else {
      $scope.formData.universitySelected[key].selected = value;
   }
});