javascript - 当将 `track by $index` 与过滤器一起使用时，我收到错误。怎么解决这个问题？

Question

我有一个错误的字符串数组值。它里面有重复的值。我想从数组字符串中删除不需要的空格和数字。所以我用过滤器清洁所有东西。

问题是，当我单独使用过滤器时，我会收到重复错误，如果我删除它，我的过滤器将无法工作。

如何处理这种情况？

这是我的代码:

var myApp = angular.module('myApp',[]);

arr=[
  "1. Completion of Site mobilization \n2. Erection of Tower cranes 2, 4 & 5\n3. Facade dismantling  (Grey ACP between Gates 19, 23 & 24;  Steel Louvers between Gates 2 & 3)                                                                       \n4. Excavation for Foundation (AHU Corridor,  Foundation Area 1, 2  &3, External Buildings)\n5. Civil Works on East Expansion for foundation  (F50, F52, F55, F57, F94)\n6. West Stand Roof catwalks dismantling completed 100 %\n7. Assembly/Erection of temporary towers for Lighting Arch \n    dismantling\n8. Score Board dismantling\n9. Completion of Site mobilization 10. Erection of Tower cranes 2, 4 & 5\n11. Facade dismantling  (Grey ACP between Gates 19, 23 & 24;  Steel Louvers between Gates 2 & 3)                                                                       \n12. Excavation for Foundation (AHU Corridor,  Foundation Area 1, 2  &3, External Buildings)\n13. Civil Works on East Expansion for foundation  (F50, F52, F55, F57, F94)14. West Stand Roof catwalks dismantling completed 100 %\n15. Assembly/Erection of temporary towers for Lighting Arch \n    dismantling\n16. Score Board dismantling",
  "",
  ""
]


myApp.controller('main', function($scope){

    $scope.arrays = arr;

});

angular.module("myApp")
.filter("string2array", 

    function () {

        return function ( value ) {

            if(!value) return;

            return value.filter(Boolean).join('\n').replace(/^\d+\.\s+/gm, '').split('\n');

        }

});

这是我的js尝试:Js Demo

这里是 angularjs 集成，这给我带来了问题

angualrjs demo

Answer 1

过滤器应用于数组，因此您只需要做..

<li ng-repeat="array in arrays | string2array track by $index">

fiddle