[英]How to iterate only through defined indexes in array?
我试图仅通过我在angularjs数组中定义的索引进行迭代,如下所示:
控制器:
$scope.days = new Array();
$scope.days[4] = true;
$scope.days[7] = true;
模板:
<!-- Had to add 'track by $index' to suppress 'Duplicate in a repeater' error-->
<div ng-repeat="(day, value) in days track by $index">
{{day}}: {{value}}
</div>
输出:
0:
1:
2:
3:
4: true
5:
6:
7: true
为什么ng-repeat会“填补空白”索引? 如何使它仅显示我已明确定义的索引? 如果我console.log注销我的数组,它只打印我定义的索引。
将代码替换为对象文字:
$scope.days = { 4: true, 7: true }
或更改您的逻辑并将值放在数组中:
$scope.days = [4,7]
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