AngularJS - Remove duplicate objects from object array

noDuplicates.js

function(arr){ 
	var newArr = [];
	angular.forEach(arr, function(value, key) {
		var exists = false;
		angular.forEach(newArr, function(val2, key) {
			if(angular.equals(value.id, val2.id)){ exists = true }; 
		});
		if(exists == false && value.id != "") { newArr.push(value); }
	});
  return newArr;
}

var objArr = [
	{ "id" : "1", "first_name" : "George", "last_name" : "Washington" }, 
	{ "id" : "2", "first_name" : "John", "last_name" : "Adams" }, 
	{ "id" : "3", "first_name" : "George", "last_name" : "Harrison" }, 
	{ "id" : "4", "first_name" : "John", "last_name" : "Mellancamp" }, 
	{ "id" : "5", "first_name" : "George", "last_name" : "Jetson" },
	{ "id" : "3", "first_name" : "John", "last_name" : "Bravo" }
];

Very useful solution. Thank you!