Scheduler: update recurrenceRule code snippet (DevExpress#6825)

api-reference/10 UI Components/dxScheduler/7 Interfaces/dxSchedulerAppointment/recurrenceRule.md

@@ -16,14 +16,26 @@ The **recurrenceRule** value should contain an `RRULE` pattern as per the <a hre
 If you need to obtain individual dates from an appointment series, use a 3rd-party library. In the following example, the <a href="https://github.com/jakubroztocil/rrule#rrulejs" target="_blank">rrule</a> library is used:
 
     <!-- tab: JavaScript -->
-    const rule = new rrule.rrulestr(
-        "DTSTART:20210805T050000Z\n"
-        + "RRULE:FREQ=WEEKLY;UNTIL=20210905T045959Z;BYDAY=MO,TU,WE,TH,FR\n"
-        + "EXDATE:20210825T050000Z,20210819T050000Z"
-    );
+    import { formatDate } from "devextreme/localization";
 
-    const occurences = rule.all();
-    occurences.forEach(date => console.log(date));
+    const data = [{
+        text: 'Watercolor Landscape',
+        startDate: new Date('2020-11-01T17:30:00.000Z'),
+        endDate: new Date('2020-11-01T19:00:00.000Z'),
+        recurrenceRule: 'FREQ=WEEKLY;BYDAY=MO,TH;COUNT=6',
+        recurrenceException: '20201109T173000Z'
+    }];
+
+    function logAppointmentOccurrences(appointmentData) {
+        const startDateStr = formatDate(appointmentData.startDate, "yyyyMMddTHHmmssZ");
+        const rule = new rrule.rrulestr(
+            `DTSTART:${startDateStr}\n`
+            + `RRULE:${appointmentData.recurrenceRule}\n`
+            + `EXDATE:${appointmentData.recurrenceException}`
+        );
+        const occurrences = rule.all();
+        occurrences.forEach(date => console.log(date));
+    }
 
 #####See Also#####
 - [recurrenceRuleExpr](/api-reference/10%20UI%20Components/dxScheduler/1%20Configuration/recurrenceRuleExpr.md '/Documentation/ApiReference/UI_Components/dxScheduler/Configuration/#recurrenceRuleExpr')