Hello, I have an array of dates and I'm trying to filter it to get, in three different array today dates - future dates - past dates.

// Appointment is a CoreData entity with a property date: Date
@Published var scheduledAppointments: [Appointment] = [] // this array should contain future appointments from 00:00 of tomorrow and later.
@Published var pastAppointments: [Appointment] = [] // this array should contain past appointments from 23:59 of yesterday and before.
@Published var todayAppointments: [Appointment] = [] // this array should contain today appointments from 00:00 to 23:59.

I've tried a lot of solutions (many of which didn't work) and I end up with this solution but i think is weird.

    func getTodayAppointments() {
        let allAppointments = pet.appointments?.allObjects as? [Appointment] ?? []
        let today = allAppointments.filter { appointment in
            let appointmentComponents = Calendar.current.dateComponents([.day, .year, .month], from: appointment.appointmentDate)
            let todayComponents = Calendar.current.dateComponents([.day, .year, .month], from: Date())
            return appointmentComponents == todayComponents
        }
        todayAppointments = today.sorted {
            $0.appointmentDate > $1.appointmentDate
        }
    }

    func getScheduledAppointments() {
        let allAppointments = pet.appointments?.allObjects as? [Appointment] ?? []
        let scheduled = allAppointments.filter { appointment in
            let todaySeconds = getTodaySeconds()
            return appointment.appointmentDate >= Date.now.addingTimeInterval(Double(86400 - todaySeconds - 1))
        }
        scheduledAppointments = scheduled.sorted {
            $0.appointmentDate > $1.appointmentDate
        }
    }

    func getPastAppointments() {
        let allAppointments = pet.appointments?.allObjects as? [Appointment] ?? []
        let past = allAppointments.filter { appointment in
            let todaySeconds = getTodaySeconds()
            return appointment.appointmentDate <= Date.now.addingTimeInterval(Double(-todaySeconds - 1))
        }

        pastAppointments = past.sorted {
            $0.appointmentDate > $1.appointmentDate
        }
    }

    // With this function I get the seconds passed today and then subtract or add this value to .addingTimeInterval otherwise some appointments were not displayed or displayed in more than 1 array.
    func getTodaySeconds() -> Int {
        let today = Calendar.current.dateComponents([.hour, .minute, .second], from: Date())
        let minuteInSeconds = (today.minute ?? 0) * 60
        let hourInSeconds = (today.hour ?? 0) * 3600
        let seconds = today.second ?? 0
        return minuteInSeconds + hourInSeconds + seconds
    }

Here the result on a list

Can you suggest improvements to this code? Thank you! ( English is not my main language, I hope you understand )

Thank you, your code works fine and it's cleaner than mine.