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iOS Object-Oriented Swift 2.0 Complex Data Structures Adding Instance Methods

2,039 Points

give me some clue so that i can try... question is given in snippet...

give me some hint.....

struct Person {
    let firstName: String
    let lastName: String

//Given the struct below in the editor, we want to add a method that returns 
//the person’s full name. Declare a method named getFullName() that returns a 
//string containing the person’s full name. Note: Make sure to allow for a space between the first and last name.

1 Answer

First, you need to create a function, inside the struct. Functions start with the keyword func.

Since this function is inside the struct it has access to any values stored in the member variables. So it doesn't need any parameters. If you are used to the terminology, this will be a getter function -- it will allow clients to get the values of those variables.

Second, you need to return a String, so you need to add this to the function itself: -> String, and then you need to add a return statement. The challenge asks you to do that using String interpolation. So the String you return will look like this:

      return "\(firstName) \(lastName)"
2,039 Points

thanks sir. it helped me and i have solved both tasks. kindly help me to solve this one:

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.

Snippet is given like this:

struct RGBColor{ let red: Double let green: Double let blue: Double let alpha: Double

Let description: String }