function(head, req) { var row, results; results = []; categories = (req.query.categories !== undefined ? JSON.parse(req.query.categories) : []); while (row = getRow()) { if (categories.length == 0 || categories.some(function(c) { return row.key.indexOf(c) !== -1; })) { results.push([row.key, row.value]); } } return JSON.stringify({q : req.query.categories, results : results}); }