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Start your free trialMitchell Richmond
5,401 PointsInitializer Method
Hi all, here is the problem I am working on:
In the editor, I’ve declared a struct named RGBColor that models a color object in the RGB space.
Your task is to write a custom initializer method for the object. Using the initializer assign values to the first four properties. Using the values assigned to those properties create a value for the description property that is a string representation of the color object.
For example, given the values 86.0 for red, 191.0 for green, 131.0 for blue and 1.0 for alpha, each of the stored properties should hold these values and the description property should look like this:
"red: 86.0, green: 191.0, blue: 131.0, alpha: 1.0"
I feel my initializer method gives the output the problem is asking for, but it is saying my answer is wrong. Any ideas?
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: String) {
self.red = red
self.green = green
self.blue = blue
self.alpha = alpha
self.description = ("\("red:") \(red), \("green:") \(green), \("blue:") \(blue) \("alpha:") \(alpha)")
}
}
2 Answers
Jeff McDivitt
23,970 PointsCouple things - You do not need description in your init argument. Also take a look at description inside the initialization, you have many extra parentheses that are not needed.
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) {
self.red = red
self.green = green
self.blue = blue
self.alpha = alpha
self.description = ("red: \(red), green: \(green), blue: \(blue), alpha: \(alpha)")
}
}
Mitchell Richmond
5,401 PointsThank you Jeff! I thought it had to be in the argument in order to be initialized, so I guess that's where I went wrong.
Jeff McDivitt
23,970 PointsYou had the meat of it correct! Happy Coding!