function forEachSorted(obj, iterator, context) {
  var keys = sortedKeys(obj);
  for ( var i = 0; i < keys.length; i++) {
    iterator.call(context, obj[keys[i]], keys[i]);
  }
  return keys;
}
@ngdoc function
@name angular.forEach
@module ng
@kind function

@description
Invokes the `iterator` function once for each item in `obj` collection, which can be either an
object or an array. The `iterator` function is invoked with `iterator(value, key, obj)`, where `value`
is the value of an object property or an array element, `key` is the object property key or
array element index and obj is the `obj` itself. Specifying a `context` for the function is optional.

It is worth noting that `.forEach` does not iterate over inherited properties because it filters
using the `hasOwnProperty` method.

   ```js
     var values = {name: 'misko', gender: 'male'};
     var log = [];
     angular.forEach(values, function(value, key) {
       this.push(key + ': ' + value);
     }, log);
     expect(log).toEqual(['name: misko', 'gender: male']);
   ```

@param {Object|Array} obj Object to iterate over.
@param {Function} iterator Iterator function.
@param {Object=} context Object to become context (`this`) for the iterator function.
@returns {Object|Array} Reference to `obj`.