AngularJS自定义过滤器功能

问题描述：

在我的控制器中，我想过滤一个对象数组。每个这些对象是一个可以包含字符串以及列表的映射

Inside my controller, I would like to filter an array of objects. Each of these objects is a map which can contain strings as well as lists

我尝试使用 $ filter（'filter'））格式，但我不知道如何访问我的函数内的数组的单个元素。这是一个代码片段来显示我想要的。

I tried using $filter('filter')(array, function) format but I do not know how to access the individual elements of the array inside my function. Here is a snippet to show what I want.

$filter('filter')(array, function() {
  return criteriaMatch(item, criteria);
});

然后在 criteriaMatch（）我会检查每个个体属性是否匹配

And then in the criteriaMatch(), I will check if each of the individual property matches

var criteriaMatch = function(item, criteria) {
  // go thro each individual property in the item and criteria
  // and check if they are equal
}

b $ b

我必须在控制器中做所有这些，并编译列表的列表，并将其设置在范围内。所以我需要以这种方式访问 $ filter（'filter'）。我在网络中找到的所有示例在函数中都有静态条件搜索，它们不通过一个标准对象，并对数组中的每个项目进行测试。

I have to do all these in the controller and compile a list of lists and set them in the scope. So I do need to access the $filter('filter') this way only. All the examples I found in the net so far have static criteria searches inside the function, they don't pass an criteria object and test against each item in the array.

答

您可以这样使用它：
http://plnkr.co / edit / vtNjEgmpItqxX5fdwtPi？p = preview

像你发现的， filter 接受谓词函数， item
从数组中的项。
所以，你只需要根据给定的条件$ c>创建一个谓词函数。

Like you found, filter accepts predicate function which accepts item by item from the array. So, you just have to create an predicate function based on the given criteria.

例如， criteriaMatch 是返回与给定的条件匹配的谓词
函数的函数。

In this example, criteriaMatch is a function which returns a predicate function which matches the given criteria.

模板：

<div ng-repeat="item in items | filter:criteriaMatch(criteria)">
  {{ item }}
</div>

范围：

$scope.criteriaMatch = function( criteria ) {
  return function( item ) {
    return item.name === criteria.name;
  };
};

AngularJS自定义过滤器功能

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