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Start your free trialMatt Conway
1,572 PointsInit
Not sure why this isn't working ...
Challenge Task 1 of 1
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"
Note: Init methods typically list parameters in the same order of property declaration. For this task, stick to the order red,green,blue,alpha.
/Users/mattconway/Desktop/Screen Shot 2016-01-23 at 2.38.28 PM.png
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 = 86.0
self.green = 191.0
self.blue = 131.0
self.alpha = 1.0
}
}
1 Answer
roohart
5,529 Pointsstruct 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)"
}
}
let color = RGBColor.init(red: 86.0, green: 191.0, blue: 131.0, alpha: 1.0)
You don't include the arguments with their values inside the initializer -> You include them when you're calling the initializer. The task was a bit tricky since it was giving you all those numbers but not really asking for you to include them anywhere.
More explaining about WHY the initializing is important then; Initializers