How to pick a property with the value in an array?

Question

Here I have an array with many objects. In that I have a field as "id". I want only the id which has a value as null. How to pick it?

$scope.hierarchyList = response.data;

So how to pluck the value?

Answer 1

it's quite complicate to answer if there's no way to know the structure of response.data. One way to do it (in case I understood) would be to:

var resultObj;
$scope.hierarchyList.forEach(function(hierarchy){
    if(hierarchy.id === undefined){
        resultObj = hierarchy; 
    }
})

please let me know if this is not the case or the question you're asking.