SwiftDiDi
Init and observer rules
Which of these statements about class initialization, deinitialization, and property observers in Swift are correct? Pick all that apply.
Pick all that apply
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SwiftShort answerAdvanced
Why doesn't this code compile? Can you explain it using the two-phase initialization rule…
#required
SwiftMultiple choiceIntro
You have tens of thousands of user IDs and need to check repeatedly whether a given ID is…
#set
SwiftMultiple choiceBasics
Which of these statements about Swift language rules are correct? Pick all that apply.
#deinit
SwiftShort answerBasics
When you chain several optional accesses like this and hit nil partway through, what happ…
#optional-chaining