Angular 'orderBy' filter for objects with a nested property you want to order by.

orderBy.js

// Create angular app
var app = angular.module('myApp');

// Create custom filter for objects
app.filter('orderObjectByNestedProperties', function() {
    return function(items, field, innerField, reverse) {
        var filtered = [];
        angular.forEach(items, function(item) {
            filtered.push(item);
        });
        filtered.sort(function (a, b) {
            a = parseFloat(a[field][innerField]);
            b = parseFloat(b[field][innerField]);
            return a - b;
        });
        if(reverse) filtered.reverse();
        return filtered;
    };
});

// Use custom filter
var orderedArray =  $filter('orderObjectByNestedProperties')(unorderedObject, outerProperty, innerProperty, true);