AngularJS sorting paged table using UI-bootstrap

AngularJS sorting a paged table (using controller as vm, ui-bootstrap)

vm.sortTable = sortTable;
vm.reverseSort = false;

vm.currentPage = 1;
vm.numPerPage = 5;
vm.maxPageSize = 5;

var defaultNumberPerPage = 5;

function sortTable(header) {

            // used by the sort order 'caret'
            vm.orderByField = header; 
            
            // show all (unpaged) items. 
            vm.numPerPage = vm.filteredQuotes.length; // the total count of the array
            
            // sort by the selected header, reverse when descending
            vm.reverseSort = !vm.reverseSort;
            vm.filteredQuotes = _.sortBy(vm.filteredQuotes, header);
            if (vm.reverseSort) {
                vm.filteredQuotes.reverse();
            }
            
            // reset the paging to default
            vm.numPerPage = defaultNumberPerPage; 
      }

template

 <table class="table table-bordered table-condensed">
                                    <tr>
                                        <th>
                                        <a data-ng-click="vm.sortTable('QuoteNumber')">Quote # 
                                        <span data-ng-show="vm.orderByField == 'QuoteNumber'">
                                        <span data-ng-show="!vm.reverseSort">^</span><span data-ng-show="vm.reverseSort">v</span>
                                        </span>
                                            </a>
                                        </th>
                                    </tr>
                                    <tbody>
                                        <tr data-ng-repeat="w in vm.filteredQuotes | filter : paginate">  
                                            <td>{{w.QuoteNumber}} 
                                            </td>
                                        </tr>
                                    </tbody>
                                </table>
                                <pagination total-items="vm.filteredQuotes.length" page="vm.currentPage"
                                    max-size="vm.maxPageSize" boundary-links="true"
                                    items-per-page="vm.numPerPage" class="pagination-sm">
                                </pagination>