如何使用Angular中的另一个数组中的值过滤ng-repeat？

时间：2022-01-03 19:42:51

Is there any way to use an Angular filter to compare value with every value from an array?

有没有办法使用Angular过滤器将值与数组中的每个值进行比较？

Categories: <span ng-repeat="c in i.categories | filter: '!'+'myArray' ">{{c}}</span>

I would like to display values from i.categories that are not in myArray:

我想显示i.categories中不在myArray中的值：

$scope.i = {
  categories: [
    "Europe & Eurasia",
    "Featured",
    "Headlines",
    "Middle East",
    "News",
    "NEWS BY TOPIC",
    "News Categories",
    "REGIONAL NEWS"
  ]
};

$scope.myArray = ['Featured', 'Headlines', 'News'];

I want to get everything from c which is not contained in the myArray.

我想从c中获取未包含在myArray中的所有内容。

I've tried with writing some functions, but I get my app really slow, because of a lot requests.

我尝试过编写一些函数，但由于请求很多，我的应用程序确实很慢。

So, can I just somehow pass my array, and let Angular goes through every single item in that array and compare it with the current value?

那么，我可以以某种方式传递我的数组，让Angular遍历该数组中的每一项并将其与当前值进行比较吗？

2 个解决方案

#1

3  

You can try to use a custom filter, like the following:

您可以尝试使用自定义过滤器，如下所示：

angular.module('myApp', []).filter('notInArray', function($filter) {
    return function(list, arrayFilter) {
        if(arrayFilter) {
            return $filter("filter")(list, function(listItem) {
                return arrayFilter.indexOf(listItem) == -1;
            });
        }
    };
});

Use it like this:

像这样用它：

<div ng-repeat='c in i.categories | notInArray:myArray'>{{c}}</div>

JSFiddle demo

angular.module('Test', []).filter('notInArray', function($filter) {
    return function(list, arrayFilter) {
        if(arrayFilter) {
            return $filter("filter")(list, function(listItem) {
                return arrayFilter.indexOf(listItem) == -1;
            });
        }
    };
});

function Ctrl($scope) {
  $scope.i = {categories: [
      "Europe & Eurasia",
      "Featured",
      "Headlines",
      "Middle East",
      "News",
      "NEWS BY TOPIC",
      "News Categories",
      "REGIONAL NEWS"
  ]};
  
  $scope.myArray = ['Featured', 'Headlines', 'News'];
}
<!DOCTYPE html>
<html ng-app='Test'>
<head>
  <script src="http://code.angularjs.org/1.1.1/angular.min.js"></script>
  <meta charset=utf-8 />
</head>
<body ng-controller='Ctrl'>
  <div ng-repeat='c in i.categories | notInArray:myArray'>{{c}}</div>
</body>
</html>

#2

1  

You can use like this also.

你也可以这样使用。

angular.module('App.filters', []).filter('companyFilter', [function () {
    return function (arr, selArr) {
      var retArr = [];
        angular.forEach(arr, function(v, k){
      var found =0;
            for(var i=0; i<selArr.length; i++){
            if(selArr[i] == v.name){
                    found = 1;
                break;
            }
          }
          if(found == 0){
            retArr.push(v);
          }
      })
      return retArr;
    };
}]);

<div ng-controller="MyCtrl">
  <div ng-repeat="c in categories|filter:customFilter">
{{c}}
  </div>
</div>

#1

3  

You can try to use a custom filter, like the following:

您可以尝试使用自定义过滤器，如下所示：

angular.module('myApp', []).filter('notInArray', function($filter) {
    return function(list, arrayFilter) {
        if(arrayFilter) {
            return $filter("filter")(list, function(listItem) {
                return arrayFilter.indexOf(listItem) == -1;
            });
        }
    };
});

Use it like this:

像这样用它：

<div ng-repeat='c in i.categories | notInArray:myArray'>{{c}}</div>

JSFiddle demo

angular.module('Test', []).filter('notInArray', function($filter) {
    return function(list, arrayFilter) {
        if(arrayFilter) {
            return $filter("filter")(list, function(listItem) {
                return arrayFilter.indexOf(listItem) == -1;
            });
        }
    };
});

function Ctrl($scope) {
  $scope.i = {categories: [
      "Europe & Eurasia",
      "Featured",
      "Headlines",
      "Middle East",
      "News",
      "NEWS BY TOPIC",
      "News Categories",
      "REGIONAL NEWS"
  ]};
  
  $scope.myArray = ['Featured', 'Headlines', 'News'];
}
<!DOCTYPE html>
<html ng-app='Test'>
<head>
  <script src="http://code.angularjs.org/1.1.1/angular.min.js"></script>
  <meta charset=utf-8 />
</head>
<body ng-controller='Ctrl'>
  <div ng-repeat='c in i.categories | notInArray:myArray'>{{c}}</div>
</body>
</html>

#2

1  

You can use like this also.

你也可以这样使用。

angular.module('App.filters', []).filter('companyFilter', [function () {
    return function (arr, selArr) {
      var retArr = [];
        angular.forEach(arr, function(v, k){
      var found =0;
            for(var i=0; i<selArr.length; i++){
            if(selArr[i] == v.name){
                    found = 1;
                break;
            }
          }
          if(found == 0){
            retArr.push(v);
          }
      })
      return retArr;
    };
}]);

<div ng-controller="MyCtrl">
  <div ng-repeat="c in categories|filter:customFilter">
{{c}}
  </div>
</div>
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