将动态分类汇总添加到闪亮的DataTable

$(document).ready(function() {
    var table = $('#example').DataTable({
        "processing": true,
        "serverSide": true,
        "ajax": "server_processing.php",
        "columns": [
            { "data": "name" },
            { "data": "position" },
            { "data": "office" },
            { "data": "age" },
            { "data": "start_date" },
            { "data": "salary" }
        ],
        "drawCallback": function(settings) {
            var api = this.api();
            var rows = api.rows({ page: 'current' }).nodes();
            var last = null;

            api.column(2, { page: 'current' }).data().each(function(group, i) {
                if (last !== group) {
                    $(rows).eq(i).before(
                        '<tr class="group"><td colspan="6">' + group + '</td></tr>'
                    );
                    last = group;
                }
            });
        }
    });
});