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iOS Object-Oriented Swift Class Inheritance Overriding Methods

Thomas Dobson
Thomas Dobson
7,511 Points
Posted by Thomas Dobson
Thomas Dobson
7,511 Points

Inheritance Code Challenge

Hello,

I managed to complete this Code Challenge but I couldn't help but feel like I cheated to some extent. I feel that I should have incorporated some sort of 

override func {}

as it was the topic of the last lesson. I pushed a new constant doctorPreFix to the instance in place of first name, which in turn overrode the inherited interpolation function.

Did I go about this challenge correctly? Obviously there is more than one way to solve a problem but I am curious to know if my methodology differs from the intended solution. If it does; are there any drawbacks to my method of solving the challenge?

objects.swift 
//Final Inheritance Code Challenge

class Person {
    var firstName: String
    let lastName: String

    init(firstName: String, lastName: String)
    {
        self.firstName = firstName
        self.lastName = lastName
    }

    func fullName() -> String {
        return "\(firstName) \(lastName)"
    }
}

// Enter your code below

class Doctor: Person
{
    let doctorPreFix = "Dr."

    override init(firstName: String, lastName: String) {
        super.init(firstName: doctorPreFix, lastName: lastName)
    }
}


let someDoctor = Doctor(firstName: "Jim", lastName: "Bean")

1 Answer

Jeff McDivitt
Jeff McDivitt
23,970 Points
Jeff McDivitt
Jeff McDivitt
23,970 Points

Hi Thomas - You are completely correct as you did not override the function, but you override the initialization which is ok but the code challenge could be completed much easier by just overriding the function. Also you do not need to create the prefix Dr. just write that into the return statement when you override the function.

class Person {
    let firstName: String
    let lastName: String

    init(firstName: String, lastName: String) {
        self.firstName = firstName
        self.lastName = lastName
    }

    func fullName() -> String {
        return "\(firstName) \(lastName)"
    }
}

class Doctor: Person {

    override func fullName() -> String {
        return "Dr. \(lastName)"
    }
}

let someDoctor = Doctor(firstName: "Jeff", lastName: "McDivitt")
let IamDoctor = someDoctor.fullName()
Thomas Dobson
Thomas Dobson
7,511 Points
Thomas Dobson
Thomas Dobson
7,511 Points

Great thank you! I don't know why I I reinitialized in the subclass. Sill don't quite have my head around this yet.