SOLVED: Unwrap app; Lesson: Structs - Access control – 100 Days of SwiftUI

SOLVED: Unwrap app; Lesson: Structs - Access control

@bkeys818

Apr '20

I'm using the Unwrap app for the first few day of 100's of SwiftUI, and I can't figure out why one of the quiz questions is what it is.

Lesson: Structs - Access control

Quiz Quesiton: This is valid Swift - true or false?

sturct Person {
private var socialSecurityNumber: String
  init(ssn: String) {
    socialSecurityNumber = ssn
  }
}
let sarah = Person(ssn: "555-55-555")

Answer: True

I thought line four need to be self.socialSecurityNumber = ssn

Why isn't self used? Can someone explain?

@roosterboy HWS+

Apr '20

You don't need to use self in an init method unless the variable you are assigning to has the same name as one of the method's parameters or when referring to another initializer of the struct.

So if it had been like this:

init(socialSecurityNumber: String) {
    self.socialSecurityNumber = socialSecurityNumber
}

then you would have to use self so the compiler would know which socialSecurityNumber you were referring to.

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