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iOS Swift Enums and Structs Enums and their Methods Methods or Member Functions

Posted by TAYLOR HENSLEY
TAYLOR HENSLEY
975 Points

Modifty the isGreater function

I am honestly just really confused in general and don't know where to start?

enum.swift 
enum Coin: Int {
    case Penny = 1, Nickel = 5, Dime = 10, Quarter = 25 

    func isGreater(currentValue: Coin, newValue: Coin) -> Bool {
        return currentValue.rawValue > newValue.rawValue
    }

}

1 Answer

Richard Lu
Richard Lu
20,185 Points
Richard Lu
Richard Lu
20,185 Points

Hey Taylor,

So currently you have a method that accepts two parameters named currentValue and newValue. They want you to get rid of currentValue and use the keyword self instead which results in only one parameter named newValue. 

enum Coin: Int {
    case Penny = 1, Nickel = 5, Dime = 10, Quarter = 25 

    func isGreater(newValue: Coin) -> Bool {
        return self.rawValue > newValue.rawValue
    }
}

when speaking of self. It's basically talking about the value that called this method.

i.e.

let x = Coin.Penny

// x is the value that calls the method
x.isGreater(Coin.Quarter)

Let me know how this works for you :)