How to use

ceil

function

in

LoDashStatic

router.get('/ui/nmap/history', function(req, res){
 var page = req.query.page;
 var limit = req.query.limit;
 var results = manager.getResults();
 var itemCounts = results.length;
 var paginate = res.locals.paginate;

 pageCount = _.ceil(itemCounts / limit);

 var i = 1;
 // add index number to each result
 _.forEach(results, function(item) {
  item.index = i;
  i++;
 });
 //注意：page是从1开始计数的, paginate模块自动算好skip
 results = _.slice(results, req.offset, page*limit );
 var pages = paginate.getArrayPages(10, pageCount, page);
 logger.debug("page: %d pageCount: %d pages: %s",
       page, pageCount, util.inspect(pages, { depth: null }));
 var historyOptions = {
             title:"端口扫描历史",
             results: results,
             pages: pages,
             pageCount: pageCount,
             paginate: paginate
            };
 res.render('nmap_history', historyOptions);
});