How to append an array inside another array?-CodePudding

I have an array of selectedWeekdays and I want to append the shifts array in the Weekday object.

For instance, I want to append the array of shifts for every instance in selectedWeekdays where name is equal to Monday

struct Weekday: Identifiable {
    var id: String = UUID().uuidString
    var name: String
    var index: Int
    var shifts: [Shift]
}

struct Shift: Identifiable, Encodable {
    var id: String = UUID().uuidString
    var startTime: Date
    var endTime: Date
}

@Published var selectedWeekdays: [Weekday] = []

I have tried the following but it does not work:

self.selectedWeekdays.contains(where: {$0.name == weekday}).shifts.append({Shift(startTime: startTime, endTime: endTime)})

It shows the following error: Value of type 'Bool' has no member 'shifts'

CodePudding user response：

the contains returns boolean, and you are trying to use as the array of the Weekday itself.

To filter the array and return the same structure, you must use the filter function and iterate with them using compactMap (which iterates to every not null element).

self.selectedWeekdays
    .filter { $0.name == weekday }
    .compactMap { $0.shifts.append(
            Shift(startTime: startTime, endTime: endTime)
        )
    }

CodePudding user response：

you can use to get the certain item, but it might require you to unwrap the optional first.

if var item = selectedWeekdays.first(where: {$0.name == weekday}) {
    item.shifts.append(your new element)
}