Module 2: Lesson 4 Challenge

App Development
1

Here goes the Solution of, 90 day challenge Module2: Lesson 4 Question,
I spend at least 3-4 hours to figure out this code, fully fascinated by the question,
I want to ask, is this speed good? are there any recommendation to be made in code?

//
//  ContentView.swift
//  Module2: Lesson4 Challenge
//
//  Created by Sam Grover on 19/05/22.
//

import SwiftUI

struct ContentView: View {
    var array = [1,2,3,4,5,6,7,8,9,10]
    @State var randomArray = [Int]()
    var body: some View {
        VStack
        {
            NavigationView{
                List(randomArray, id: \.self){
                    arrayElement in Text(String(arrayElement))
                }.navigationBarTitle(Text("My List"))
            }
            
            HStack{
                Spacer()
                Button("Generate") {
                    addElement()
                }
                Spacer()
                Button("Increase") {
                    var a = 0
                    while(a <= (randomArray.count-1))
                    {
                       randomArray[a] += 1
                        a += 1
                    }
                }
                Spacer()
                Button("Clear"){
                    randomArray.removeAll()
                }
                Spacer()
            }
        }
    }
    func addElement(){
        var ongoing = true
        while(ongoing == true)
        {
            let randomIndex = Int.random(in: 0...9)
            randomArray.append(array[randomIndex])
            if randomIndex == 6 {
                ongoing = false
            }
        }
        
    }

}


struct ContentView_Previews: PreviewProvider {
    static var previews: some View {
        ContentView()
    }
}
2

Hi Sam,

Well done but the question asks you to add numbers between 1 and 10. It also says if the number you added was not a 7 then to keep adding random numbers until you add a 7 to the list.

So your code that adds random numbers should ensure that the last number added is in fact a 7 and then stop adding numbers. Consider the following code for your func addElement()

    func addElement() {
        var randomNumber: Int
        repeat {
            randomNumber = Int.random(in: 1...10)
            randomArray.append(randomNumber)
        } while randomNumber != 7
    }

In your code that increments each array element value by 1, you might consider this method

 for arrayIndex in 0..<randomArray.count {
    randomArray[arrayIndex] += 1
}