AngularJS - Get object index in custom filter

Question

I have made a custom filter in controller but can't get index or size of iterated json. Calling program.length gets me undefined. Any ideas?

$scope.filterFn = function(program){
    if(case){
        return true;
    }
    console.log(program.length);//undefined
    return false;       
};

1) case is a reserved keyword, you cannot use it as a variable name. 2) how are you calling the filter? — Maria Ines Parnisari, Jun 09 '16 at 13:03
"Case" is just a placeholder. Filter is working as it should. I just need json object length. — Axon, Jun 09 '16 at 13:05
Yes it is. I got length in http.get and then passed it to filter, it is the only way i got it to work. — Axon, Jun 09 '16 at 13:14

score 2 · Answer 1 · answered Jun 09 '16 at 13:13

2

try to use this code to get object length.

Object.keys(program).length;

answered Jun 09 '16 at 13:13

Nikdyvice

101
4

score 0 · Answer 2 · edited May 23 '17 at 10:34

0

try : How to display length of filtered ng-repeat data, so you can access size by $scope.filtered.length like the example.

edited May 23 '17 at 10:34

Community

1
1

answered Jun 09 '16 at 13:15

Itsik Mauyhas

3,824
14
69
114

score 0 · Answer 3 · answered Jun 09 '16 at 13:22

0

Are there any more filters before this? Coz previous filters decide input for next filter?

answered Jun 09 '16 at 13:22

Viral Shah

47
5

score 0 · Answer 4 · answered Jun 09 '16 at 13:24

The length() method is only available on an array [].

In this case you are trying to get the size of a json object {}, please note this does not have a length. If you need to see how many items exist in this object, you can try to first convert all the keys into an array by using Object.keys(program) which will give you an array.

If program originally looked like this: { foo: 'some value', bar: 'another value' }

using Object.keys(program) will give you ['foo', 'bar'] On this array you can now call the length method, so that you have Object.keys(program).length, which in this case would give you 2.

AngularJS - Get object index in custom filter

4 Answers4