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Ingo Ngoyama
4,882 Pointslet statement confusion
I am confused on the use of let descriptiion= I think we are suppose to write this one with out a function but I have not done so before. Where do we use the let description = String at
struct Paint
{
let red: Double
let green: Double
let blue: Double
let alpha: Double
// 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
}
func Palete( description: String) -> String
{
let description = "red: \(red), green: \(green), blue: \(blue), alpha: \(alpha)"
return description
}
}
let color = Paint(red: 11.0, green: 22.0, blue: 33.0, alpha: 44.0)
color.Palete(description: <#T##Paint#>)
2 Answers
Chris Stromberg
Courses Plus Student 13,389 PointsI would first add a stored property for the string description to your Struct.
let red: Double
let green: Double
let blue: Double
let alpha: Double
// You need this stored property in your struct.
let description: String
You want to initialize, or assign the description string a value, so you would do this in the init portion of the the struct.
init(red: Double, green: Double, blue: Double, alpha: Double)
{
self.red = red
self.green = green
self.blue = blue
self.alpha = alpha
// When we initialize a new object of type Paint, we give its description property this value.
self.description = "red: \(red), green: \(green), blue: \(blue), alpha: \(alpha)"
}
Last call the method on your instance of Paint. Which will return your string.
color.description()
Ingo Ngoyama
4,882 PointsThank you very much I see now to just treat the struct like a completely independent function. But the () on the description call is not needed.
Ingo Ngoyama
4,882 PointsIngo Ngoyama
4,882 PointsWhoops the editor on treehouse did not like it . It must want a string conversion of the color description.
Ingo Ngoyama
4,882 PointsIngo Ngoyama
4,882 PointsHello Chris. The editor for some reason says that the string for description doesn't match the example.