ArrayLists giving wrong information? C#

Question

Hello there,

I am trying to make an Dialogue system(I dont want to use any plugins as this is a learning procces for me). But the ArrayLists are giving me other information then expected. This is my code:

 private ArrayList Questions = new ArrayList();
 private ArrayList Answers = new ArrayList();
 
   
     //public Texture CharacterTexture;
     void Start () {
       
         Answers.Add("Doorgaan?");
         Answers.Add("nee");
         Answers.Add("ja");
         Questions.Add(Answers);
         Answers.Clear();
         Answers.Add("En wat nu weer?");
         Answers.Add("aaaa");
         Answers.Add("bbbb");
         Questions.Add(Answers);
     }
     
     // Update is called once per frame
     void Update () {
         
     }
     void OnGUI()
     {
         
         if(GUI.Button(new Rect(Screen.width / 2 - 150,250,300,50),((ArrayList)Questions[0])[0].ToString())){
             Debug.Log("Je hebt nu op nr 0 geklikt");
         }
         if (GUI.Button(new Rect(Screen.width / 2 - 150, 300, 300, 50), ((ArrayList)Questions[0])[1].ToString()))
         {
             Debug.Log("Je hebt nu op nr 1 geklikt");
         }
         if (GUI.Button(new Rect(Screen.width / 2 - 150, 350, 300, 50), ((ArrayList)Questions[0])[2].ToString()))
         {
             Debug.Log("Je hebt nu op nr 2 geklikt");
         }

Now I expect 'Questions[0])[0]' to display "Doorgaan?", 'Questions[0])[1]' "Nee" etc. But instead it is showing me "en wat nu weer?", "aaaa" and "bbbb".. How can I fix it? What am I doing wrong in my code?

Thank you for your time :)

Answer 1

Best Answer

Answer by yatagarasu · Nov 26, 2013 at 05:39 PM

You should allocate new Array, not Clear the old one.

  void Start () {
  
 Answers.Add("Doorgaan?");
 Answers.Add("nee");
 Answers.Add("ja");
 Questions.Add(Answers);
 
 Answers = new ArrayList();
 Answers.Add("En wat nu weer?");
 Answers.Add("aaaa");
 Answers.Add("bbbb");
 Questions.Add(Answers);
 }

Add comment · Show 2 · Share

Lovrenc · Nov 26, 2013 at 05:42 PM 0

Share

Since he looses the reference to first set of answers, this is effectively the same.

Xitech_ · Nov 26, 2013 at 06:59 PM 0

Share

I see what I did wrong, you're right. It's a reference to the Answers array, and I clear it, and simply put new data in it, that's why it showed the last answers I added. Thanks!

Answer 2

Answer by Lovrenc · Nov 26, 2013 at 05:41 PM

Since this is a learning project i dont know how much of a "spoiler" answer you want.

However, your problem is in your data structure. You have one Answers list for all your questions. This wont work. You need a set of answers for every question.

So why do you get these results. You used

 Answers.Clear();

and cleared the list => you lost the answers for 1st question.

Add comment · Show 1 · Share

Xitech_ · Nov 26, 2013 at 07:00 PM 0

Share

I see, thanks, same as other answer :p

ArrayLists giving wrong information? C#

2 Replies

Your answer

Welcome to Unity Answers

Follow this Question

Related Questions