How to get the indexOf an object within an AngularJS response object collection?

Question

Use Case

I have a collection of objects returned from a REST request. Angular automatically populates each element with a $$hashKey. The problem is that when I search for an object in that array without the $$hashKey, it returns -1. This makes sense. Unfortunately, I don't have knowledge of the value of $$hashKey.

Question

Is there a more effective way to search for an object within an object collection returned from a REST request in AngularJS without stripping out the $$hashKey property?

Code

function arrayObjectIndexOf(arr, obj) {
var regex = /,?"\$\$hashKey":".*?",?/;
    var search = JSON.stringify(obj).replace(regex, '');
    console.log(search);
    for ( var i = 0, k = arr.length; i < k; i++ ){
        if (JSON.stringify(arr[i]).replace(regex, '') == search) {
            return i;
        }
    };
    return -1;
};

Answer 1

angular.equals() does a deep comparison of objects without the $ prefixed properties...

function arrayObjectIndexOf(arr, obj){
    for(var i = 0; i < arr.length; i++){
        if(angular.equals(arr[i], obj)){
            return i;
        }
    };
    return -1;
}