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iOS Object-Oriented Swift Complex Data Structures Custom Initializers

Arius Eich
Arius Eich
2,769 Points

Assigning Double to the a string

I don't understand how to assign the doubles as as they ask to the string description?

structs.swift
struct RGBColor {
    let red: Double
    let green: Double
    let blue: Double
    let alpha: Double

    let description: String

    // Add your code below
    init(red: Double, green: Double, blue: Double, alpha: Double, description: Double) {
        self.red = red
        self.green = green
        self.blue = blue
        self.alpha = alpha

        self.description = "red:\(red), green:\(green), blue:\(blue), alpha:\(alpha)"
    }
}

2 Answers

Hi there,

Two little things wrong there - not much!

You don't need to pass in description into the init method; you construct it inside init.

Second, you want a space after each colon in your string to make it match the required output:

    init(red: Double, green: Double, blue: Double, alpha: Double) { // <- don't pass in 'description'
        self.red = red
        self.green = green
        self.blue = blue
        self.alpha = alpha
        // add space after each :
        self.description = "red: \(red), green: \(green), blue: \(blue), alpha: \(alpha)"
    }

I hope that helps,

Steve.

No problem! :+1: :smile: