In my array of appointment objects, each object includes the key: "RecurrenceRule". This key can either be empty (null) or contain something like this:
"RecurrenceRule": "FREQ=DAILY;INTERVAL=1;COUNT=5;"Here is an example of one element in the array:
{
appointmentId: 001239,
subject: "Something",
client: "Bob",
startTime: "2020-04-16T11:00:00.000Z",
endTime: "2020-04-16T11:30:00.000Z",
km: 90,
RecurrenceRule: null,
}
My goal is to iterate through these appointments using the .reduce() function. If an element has
"RecurrenceRule": "FREQ=DAILY;INTERVAL=1;COUNT=5;"count. If RecurrenceRule is null, then I want to assign 1 to count. Below is the method I am using:
export class AppointmentComponent implements OnInit {
appointments;
ngOnInit(){
this.getAppointments();
}
getAppointments(){
this.appointmentService.getAppointments().subscribe((data : any) => {
this.appointments= data.appointment;
this.groupByClient();
});
};
groupByClient(){
var result = [];
this.appointments.reduce(function (res, value) {
let diff = dayjs(value.endTime).diff(dayjs(value.startTime), "hour",true) % 60;
if(res[value.RecurrenceRule] !== null) {
let count = parseInt(value.RecurrenceRule.split("COUNT=")[1])
} else {
let count = 1;
}
if (!res[value.client]) {
res[value.client] = {
km: value.km,
client: value.client,
count: this.count,
difference: diff * this.count
};
result.push(res[value.client]);
} else {
res[value.client].km += value.km;
res[value.client].difference += diff;
}
return res;
}, {});
}
}
However, I encounter the error message:
ERROR TypeError: Cannot read property 'count' of undefinedthis.count lines. What could be causing this issue? Could it be related to the nested this.?
If more information is needed, please do not hesitate to ask.