Swift 5 to Swift 4.2. I can't understand what you are trying. What version of Xcode are you using?

I have a binary framework dependency compiled with swift 4.2.1. That means you cannot build a binary for App Store, are you OK with it?

So, what's your choice? Continue developing with Xcode 10.1? Or migrate your framework to Xcode 12?

If your main concern is keeping the old versions, I use git. For making backups just for backups, I use Time Machine.

Is there for playground some memory limits or etc? Not clearly documented, but there might have been. As far as I tried your code on Xcode Playground of 12.4, it showed non nil result. The issue may be fixed in 12.4, or some other things may be affecting.

macOS Catalina 10.15.7 (19H524) Thanks for clarifying. I tried on Mac mini 2018 with macOS Big Sur 11.1. Quite interesting difference.Not sure any of the settings may be affecting or not.

Thanks for revealing the fact you found. In fact, I was just changing height while trying (although you clearly described change width and height in your original post). Will try to help better if I have next chance.

You may register a notification with specifying the start date, no repeating. You can re-register the everyday notification when processing the date specified notification. Or you can register a next notification at each time you received a date specific notification.

Also, I'm not familiar with how to schedule a new notification when the existing one fires. What function is that? Please show your code currently registering notification and handling notification. You once wrote This works perfectly.

Please show your code currently registering notification and handling notification. Waiting for the code handling notification.

I guess I have chosen a bad term. Please show your code responding to notifications.

Firebase is not a framework of Apple's. You will get better responses sooner if you post such questions in a proper site, such as supporting site or community sites of Firebase.

Xcode needs to be installed on a startup drive of macOS. Better clean up your Mac's startup disk.

When will the loop finish? When arrayOfItems is finished? Or a longer Array finished? Or else you want an infinite loop? In case When arrayOfItems is finished: for i in arrayOfItems.indices { let elt1 = arrayOfItems[i] let elt2 = arrayOfFive[i % arrayOfFive.count] print(elt1) print(elt2) print() } (Assuming arrayOfFive is not empty.)

Please make a better formatting to your code, start with ``` only line and end with ``` only line. You declare the type of your first property id as ObjectIdentifier (which is rarely used), but passing an instance of UUID to it. Try changing the definition of DoseModel as follows: struct DoseModel: Identifiable { var id: UUID //- var date: String var medicine: String var units: Double //- You use `doubleValue` for `value` var value: String } By the way, what is JSON? I guess you are using an old third party framework which once was popular in ancient Swift developers. But currently, it is considered to be a ruins of old era. You should better move to Codable.