Tentando rowspan

server/services/eventos.js

@@ -18,21 +18,20 @@ _out.println('<div style="display: flex; justify-content: center; margin-top: 80
                 _out.println('<th>Preço</th>')
                 _out.println('<th>Categoria</th>')
             _out.println('</tr>')
-
+            
+            let copiaDbRecords = dbRecords.slice()
 
             for (const dbRecord of dbRecords) {
 
-                 const cat = dbRecords.filter(r => r.getString("categoria") === dbRecord.getString("categoria"))
-                 const categoria = cat.length > 1 ? `<td rowspan="${cat.length}">${dbRecord.getString("categoria")}</td>` : 
-                    `<td>${dbRecord.getString("categoria")}</td>`
-
-
+                 const length = copiaDbRecords.length
+                 copiaDbRecords = copiaDbRecords.filter(r => r.getString("categoria") != dbRecord.getString("categoria"))
+                    
                 _out.println('<tr style="height: 35px;">')
                     _out.println(`<td>${dbRecord.getString("titulo")}</td>`)
                     _out.println(`<td>${dbRecord.getString("data")}</td>`)
                     _out.println(`<td>${dbRecord.getInt("capacidade")}</td>`)
                     _out.println(`<td>${dbRecord.getDouble("preco")}</td>`)
-                    _out.println(categoria)
+                    {(length - copiaDbRecords.length) > 0 && _out.println(`<td rowspan="${cat.length}">${dbRecord.getString("categoria")}</td>`)
                 _out.println('</tr>')
             }