Simple IIFE promise chain

gistfile1.js

   $scope.loadParents = function () {
        spService.getParents().then(function (pResult) {
            for (var x = 0; x < pResult.data.d.results.length; x++) {
                var iter = pResult.data.d.results[x];

                var parent = {};
                parent.Title = iter.Title;
                parent.ChildColumnId = iter.ChildColumnsId;
                parent.Children = [];
                $scope.parents.push(parent);
            }

            for (var idx in $scope.parents) {
                (function (idx) {
                    var iter = $scope.parents[idx];
                    var childPromises = [];
                    childPromises.push(spService.getChildren(iter.ChildColumnId));

                    $q.all(childPromises).then(function (childResults) {
                        var child = {};
                        child.Title = childResults[0].data.d.Title;
                        iter.Children.push(child);
                    });
                })(idx);
            }
        })
    };