AngularJS First in array after Filter

javascript angularjs angularjs-scope angularjs-ng-repeat angularjs-filter

34,240

Solution 1

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

Solution 2

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

34,240

Author by

dab

Updated on May 20, 2020

Comments

dab almost 4 years
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.

For example I have:
```
filter:search
```
On my repeat, how can I call $scope.list[0]; to equal the first search result?

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