javascript - JS/ANGULAR 使用 var 的值作为另一个对象的键

Question

我正在尝试从对象获取变量，但变量键来自另一个变量的值。

这是我想要解释的内容:

vm.getQuestion = function(category) {
        switch (category) {
          case "personal":
            var query = vm.queryBank.personal[vm.currentQueryNum];
            break;
          case "taste":
            var query = vm.queryBank.taste[vm.currentQueryNum];
            break;
          case "skills":
            var query = vm.queryBank.skills[vm.currentQueryNum];
            break;
          case "habits":
            var query = vm.queryBank.habits[vm.currentQueryNum];
            break;
          case "feedback":
            var query = vm.queryBank.feedback[vm.currentQueryNum];
            break;
          case "usabilty":
            var query = vm.queryBank.usabilty[vm.currentQueryNum];
            break;
          case "hobbies":
            var query = vm.queryBank.hobbies[vm.currentQueryNum];
            break;
          case "custom":
            alert('Not yet baba!');
            break;
          default:
            console.log('category not valid: '+category);
        }
        vm.currentQuery = query;
    }

我只想做的不是这一切:

vm.currentQuery = vm.queryBank.category[vm.currentQueryNum];

当category实际上是一个带有category键的var时，例如category的值应该是“personal”，然后它将访问对象内的个人项目。

Answer 1

if ( typeof vm.queryBank[ category ] === 'undefined' ) {
  throw 'Unsupported category "' + category + '".';
}
vm.currentQuery = vm.queryBank[ category ][ vm.currentQueryNum ];