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iOS Swift Collections and Control Flow Dictionaries in Swift Dealing With Non-Existent Data

Nathalie Dory
Nathalie Dory
2,912 Points
Posted by Nathalie Dory
Nathalie Dory
2,912 Points

How do you create an optional?

You mentioned the dictionary was composed of optional strings- how did it decide it was an optional in the first place?

1 Answer

Ryan Maneo
Ryan Maneo
4,342 Points
Ryan Maneo
Ryan Maneo
4,342 Points

The back-burner code that Apple put together determined that. (In the form of an Enumeration, actually) - don't worry if you don't know what that is yet.

You don't need to worry about how to programmatically creating a custom variable optional, because, it already exists. Put "?" immediately after a type, example: let car: String?

what this does is say that a specific example or value is not required for the code to be executable. If you have any further questions, feel free to ask :)