Your team's code review rules include "no force unwrapping (!)." Why have a rule like that?
A force unwrap crashes at runtime the instant the value is nil, and it bypasses the nil check the compiler asks for, so it's banned. Instead you bind with if let or guard let, give a default with ??, or step over with ?., so nil is handled as one branch of normal flow.
SwiftMultiple choiceIntro
Which of these three lines compile? Pick all that apply. …
#optional #iuo
SwiftMultiple choiceIntro
Which of these unwrap an optional safely? Pick all that apply.
#optional
SwiftMultiple choiceIntro
Given let view: UIView = UILabel(), which of these casts can crash at runtime?
#optional
SwiftShort answerIntro
Why does Swift have optionals?
#optional