对ngRepeat对象进行高级AngularJS自定义过滤

Question

我想实现以下理论代码：

VIEW.html

<li ng-repeat="player in players | filter:myCustomFilter(player)">{{player.name}}

CONTROLLER.js

// some theoretical conditional statement that return a boolean
$scope.otherCondition = true;


$scope.myCustomFilter = function(player) {
    return player.name.substring(0,1).match(/A/gi) && $scope.otherCondition;
}

所以我希望所有玩家都加载到Angular模型中，但我只想将玩家渲染到名称以字母“A”开头的DOM中。 当我尝试做这样的事情时，我的控制台告诉我player未定义。 我是否需要编写自定义过滤器才能实现此目的（通过angular.module().filter() ）？

Answer 1

这是一个工作小提琴： http ： //jsfiddle.net/orlenko/jV6DK/

Html代码（正如Karl Zilles建议的那样）：

<div ng-app>
    <div ng-controller="MyController">
        <h2>Names starting with "A":</h2>
        <ul>
            <li ng-repeat="player in players | filter:myCustomFilter">{{player.name}}</li>
        </ul>
        <h2>All Names:</h2>
        <ul>
            <li ng-repeat="player in players">{{player.name}}</li>
        </ul>
    </div>
</div>

使用Javascript：

function MyController($scope) {
    $scope.players = [{
        name: 'Arthur'        
    }, {
        name: 'William'
    }, {
        name: 'Bertha'
    }, {
        name: 'Alice'
    }];

    $scope.otherCondition = true;

    $scope.myCustomFilter = function(player) {
        return player.name.substring(0,1).match(/A/gi) && $scope.otherCondition;
    }
}

结果

Answer 2

您无需将播放器传递给过滤器

<li ng-repeat="player in players | filter:myCustomFilter">{{player.name}}

应该管用

Answer 3

给出的答案只是部分正确，如果你需要传递更多的参数来创建一个闭包并将这些参数传递给闭包，如下所示：

'A'传递给闭包， player作为上下文的一部分传递。

HTML：

<div ng-app>
    <div ng-controller="MyController">
        <h2>Names starting with "A":</h2>
        <ul>
            <li ng-repeat="player in players | filter:myCustomFilter('A')">{{player.name}}</li>
        </ul>
        <h2>All Names:</h2>
        <ul>
            <li ng-repeat="player in players">{{player.name}}</li>
        </ul>
    </div>
</div>

JS：

function MyController($scope) {
  $scope.players = [{
    name: 'Arthur'
  }, {
    name: 'William'
  }, {
    name: 'Bertha'
  }, {
    name: 'Alice'
  }];

  $scope.otherCondition = true;

  $scope.myCustomFilter = function(letter) {
    return function(player) {
      var rgxp = new RegExp(letter, "g");
      return player.name.substring(0, 1).match(rgxp) && $scope.otherCondition;
    }
  } 

}

结帐工作的jsfiddle