AngularJS First in array after Filter

前端未结

关注

 3  1721

In my controller I can call:

$scope.games[0];

To access the first item in my games array. Is there a way to do this keeping Filters in mind

相关标签:

3条回答

谎友^

2021-01-07 23:57
This can be done by injecting the filter's dependency into a controller and calling it in code like
```
var filteredArray = filterDependency(arrayToFilter,args);
```
which returns a new, filtered array. Since you are using the "filter" filter (it's a filter whose name is filter), the dependency injection should be filterFilter. Your controller should look something like this:
```
var app = angular.module('myapp',[]);
app.controller('ctrlParent',function($scope,filterFilter){
    var filteredArray = [];
    $scope.list = ["abc","def","ghi","abcdefghi"];
    $scope.$watch('search',function(newValue){
       filteredArray = filterFilter($scope.list, newValue);
       // do something with the first result
       console.log(filteredArray[0]); // first result
    });    
});
```
What we're doing is setting a watch on the input model (search) so we can get the new value and re-filter the array any time the input is changed.

Also:

If you need to access the ng-repeat index from within the view, you can use the special property $index inside of the ng-repeat like:
```
<div ng-repeat="item in list | filter:search">
    {{$index}}
</div>
```
You can also use $first, $middle, and $last as shown in this Angular doc.

Demo: Here is a fiddle
0 讨论(0)
发布评论:

提交评论
- 加载中...
清酒与你

2021-01-08 00:06

Are you using "ng-repeat"? If so take a look at the properties $first, $index, $middle, and $last. This will allow you to get info on the specific item from the repeat.

For more info check here: http://docs.angularjs.org/api/ng.directive:ngRepeat

0 讨论(0)
发布评论:

提交评论
- 加载中...
余生分开走

2021-01-08 00:17
Not with bracket access. If you have an ng-repeat with a filter:
```
ng-repeat="thing in things | filter:search"
```
The filtered list here is kind of anonymous - it doesn't have a name that you can access.

That said, if you take a look at the docs for ngRepeat, you'll see that inside each repeater's scope, you have access to $index, $first, $middle, and $last.

So something like
```
<body ng-app="App" ng-controller="Main">
    <pre ng-repeat="n in nums | filter:isOdd">
        n={{n}}:index={{$index}}:first={{$first}}:middle{{$middle}}:last={{$last}}
    </pre>
</body>
```
Would yield:
```
    n=1:index=0:first=true:middlefalse:last=false

    n=3:index=1:first=false:middletrue:last=false

    n=5:index=2:first=false:middlefalse:last=true
```
Fiddle
0 讨论(0)
发布评论:

提交评论
- 加载中...