javascript ngRepeat 对象上的高级 AngularJS 自定义过滤

Advanced AngularJS custom filtering on ngRepeat objects

提问by acconrad

I want to achieve the following theoretical code:

我想实现以下理论代码：

VIEW.html

查看.html

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

CONTROLLER.js

控制器.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;
}

So I want all of my players to be loaded into an Angular model, but I only want to render players into the DOM whose names start with the letter 'A'. When I try and do something like this, my console informs me that playeris undefined. Do I need to write a custom filter in order to achieve this (via angular.module().filter())?

所以我希望我的所有玩家都被加载到一个 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，我的控制台通知我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()）？

回答by orlenko

Here's a working fiddle: http://jsfiddle.net/orlenko/jV6DK/

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

Html code (exactly as Karl Zilles suggested):

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>

Javascript:

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;
    }
}

Result

结果

回答by Karen Zilles

You don't need to pass player to the filter

您不需要将播放器传递给过滤器

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

Should work

应该管用

回答by Amir Mog

The answers given are only partially correct, if you need to pass more arguments to the function you would need to create a closure and pass those arguments to the closure as follow:

给出的答案只是部分正确，如果您需要向函数传递更多参数，则需要创建一个闭包并将这些参数传递给闭包，如下所示：

The 'A'is passed to the closure and playeris passed as a part of the context.

将'A'被传递到闭合和player作为上下文的一部分被传递。

HTML:

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:

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;
    }
  } 

}

Checkout a working jsfiddle

签出一个有效的 jsfiddle