Javascript / AngularJS - 在初始化期间访问对象的属性

Question

我想访问total属性并将名词属性更改为＆＃34; items＆＃34;如果总数大于1.并且还使用total和noun属性更新句子属性。

这是我的代码：

$scope.itemCounter = {
            total: 0,
            noun: $scope.itemCounter.total <= 1 ? "item" : "items",
            sentence: $scope.itemCounter.total+" "+$scope.itemCounter.noun+" remaining"
        };

但它给了我这个错误：

Cannot read property 'total' of undefined

预期输出应为：

$scope.itemCounter.sentence = "0 item remaining";

是不是因为$ scope.itemCounter尚未初始化？如果不可能的话，有人能为我提供更好的方法吗？

Answer 1

您无法在声明之前使用它

试试这个

   var total = 0

$scope.itemCounter = {
            total: 0,
            noun: total <= 1 ? "item" : "items",
            sentence: total+" "+$scope.itemCounter.noun+" remaining"
        };

Answer 2

你可以这样做：

$scope.itemCounter = {
            total: 0,
            noun: $scope.itemCounter.total <= 1 ? "item" : "items",
            get sentence(){ 
           return $scope.itemCounter.total+" "+$scope.itemCounter.noun+" remaining"
         }
  };