How do I use current List Object [i] as the string name?

Question

Hi Guys,

I would like to do use the current selected List object[value] as my string name.

How do I convert it? I tried to get ToString but it's returning error message. (This line where has "// ERROR!!! THIS PART")

Error message: `BCE0023: No appropriate version of 'UnityEngine.Object.ToString' for the argument list '(String)' was found.`

Thanks!

Below is my code:

 #pragma strict
 import System.Collections.Generic;
  
 class TimerClass 
 {
     var TimerName : String;
     var TimerTotal : float = 30 ;
     var TimerActive : boolean = false;
     var TimerRemain : float;
     
     function CountDown ()
     {
         TimerActive = true;
         TimerRemain -= 1 * Time.deltaTime ;
     }
  }
  
 var PlayerTimer : TimerClass =  new TimerClass ();
 var PlayerTimerList : List.<TimerClass>  = new List.<TimerClass >();
 
 
 function Start () {
 }
 
 function Update () {
 }
 
 
 function AddTimer ()
 {
     PlayerTimer = new TimerClass ();
     
    PlayerTimer.TimerRemain = PlayerTimer.TimerTotal;
    PlayerTimerList.Add(PlayerTimer);
    PlayerTimer.TimerName = ToString("PlayerTimerList[]"); // ERROR!!!
    //How do I use the current PlayerTimerlist[i] as e timer's name?
 }
 
 function OnGUI ()
 {
        if ( GUI.Button(Rect(50, 150, 100,30), "NEW TIMER"))
       {
          AddTimer();
       }
 }

Answer 1

Try like this:

 var tempNum  = PlayerTimerList.Count;
 PlayerTimer.TimerName = tempNum.ToString();

that's all you meant I believe

EDIT:

lucky for you, I got a bit carried away:

 #pragma strict
 import System.Collections.Generic;
 
 class TimerClass 
 {
     var TimerName : String;
     var TimerTotal : float = 5.0 ;
     var TimerActive : boolean = false;
     var TimerRemain : float;
     var TimerBox : Rect;
     var TimerIndex : int; 
  }
 
 var buttonRect : Rect = new Rect(50, 150, 100,30);
 var PlayerTimer : TimerClass;
 var PlayerTimerList : List.<TimerClass>  = new List.<TimerClass >();
 var snapToGrid : boolean;
 var gridWidth : int = 50;
 var gridHeight : int = 50;
 
 function Start () {
 buttonRect= new Rect(50, 150, 100,30);
 PlayerTimer = null;
 }
 
 function Update () {
 
       var inverseMousePosition = Input.mousePosition;
       inverseMousePosition.y = Screen.height-inverseMousePosition.y; 
       for(timer in PlayerTimerList){
       if(Input.GetMouseButtonDown(0) && timer.TimerBox.Contains(inverseMousePosition))
       {
          PlayerTimer = timer;
           }     
        }
       if(Input.GetMouseButtonDown(0) && buttonRect.Contains(inverseMousePosition))
       {
 
        if(PlayerTimer && PlayerTimer.TimerBox.Contains(inverseMousePosition))
          Debug.Log("Override Button");
        else
          AddTimer();
       }
 
 if(Input.GetMouseButtonDown(1) && PlayerTimerList){
 for(var i = 0; i < PlayerTimerList.Count;i++){
 if(PlayerTimerList[i].TimerBox.Contains(inverseMousePosition)){
 PlayerTimerList[i].TimerActive = !PlayerTimerList[i].TimerActive;
 }
 }
   }
   if(Input.GetMouseButton(0) && PlayerTimer){
   if(!snapToGrid){
   PlayerTimer.TimerBox.x = Input.mousePosition.x;
   PlayerTimer.TimerBox.y = Screen.height-Input.mousePosition.y;
   }
   else
   {
   PlayerTimer.TimerBox.x = Input.mousePosition.x - (Input.mousePosition.x % gridWidth) ;
   PlayerTimer.TimerBox.y = (Screen.height-Input.mousePosition.y) - ((Screen.height-Input.mousePosition.y) % gridHeight);
   }
 }
  if(Input.GetMouseButtonUp(0))
  PlayerTimer = null;
  
    for(i = 0; i < PlayerTimerList.Count;i++){
      if(PlayerTimerList[i].TimerActive){
         if(PlayerTimerList[i].TimerRemain >= 0)
           PlayerTimerList[i].TimerRemain -= Time.deltaTime;
        else{
           PlayerTimerList.RemoveAt(i);  // This remove the timer
           ReName();
          }
       }
    }
 }
 function AddTimer ()
 {
     PlayerTimer = new TimerClass ();
 
    PlayerTimer.TimerRemain = PlayerTimer.TimerTotal;
    PlayerTimerList.Add(PlayerTimer);
    var tempNum  = PlayerTimerList.Count;
    PlayerTimer.TimerName = tempNum.ToString();
    PlayerTimer.TimerBox = new Rect(Input.mousePosition.x,Screen.height-Input.mousePosition.y,30,30);
 }
 
 function OnGUI ()
 {
       GUI.Box(Rect(buttonRect), "NEW TIMER");
 
       for (timer in PlayerTimerList){
       GUI.Box(timer.TimerBox,timer.TimerName);
       if (timer.TimerActive){
       GUI.Label(timer.TimerBox,"!" + timer.TimerRemain);
       }
    }      
 }
 
 function ReName(){
 for(var i = 0; i < PlayerTimerList.Count;i++)   // loop through each element of PlayerTimerList
 {
 PlayerTimerList[i].TimerName = (i+1).ToString();  // Set name equal to current position in list  (name is i+1)
 PlayerTimerList[i].TimerIndex = i;   //index is i
     }
 }

This should give you a decent head start... it allows you to drag and place your timers! For now you can right click on one to start it... Enjoy :)

NOTE: Updated... fixed a few bugs, got rid of the needless coroutine..

Answer 2

Answer by fafase · Nov 16, 2012 at 11:18 AM

ToString() is an instance method. Meaning it is used with an instance of the object class. Simply said you use it as:

 string str = obj.ToString();

In your case that would go:

 string name= PlayerTimerList[index].ToString();

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moonLite · Nov 16, 2012 at 11:34 AM 0

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Hi @fafase ,

Thanks for the suggestion, but it's returning to me 2 errors. How do I access to the index?

 $$anonymous$$ identifier: 'index'.
 
 The best overload for the method 'System.Collections.Generic.List.<TimerClass>.get_Item(int)' is not compatible with the argument list '(error)'.

fafase · Nov 16, 2012 at 11:47 AM 0

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What are you trying to convert? index is the index of the list. You know that your list is a collection of whatever you store in. They are stored as 0,1,2,3,4, and so on. You access one of them with an index or a value or anything that is an integer.

fafase · Nov 16, 2012 at 12:06 PM 1

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Let's sum it up, you want to create a new object, add it to the list and then gets its name:

 function AddTimer (){
     PlayerTimer = new TimerClass ();
     PlayerTimer.TimerRemain = PlayerTimer.TimerTotal;
     PlayerTimerList.Add(PlayerTimer);
     var count = PlayerTimer.Count-1;
     PlayerTimer.TimerName =count.ToString();
 }

Note that Count returns how many items there are in the list but the indexing starts from 0 so I subtract 1. This is not going to store "two" but the string "2". If you were to get a string of a number, you might have to do it by hand with a hell of a lot of if-else if.

One side note, it is easier to read code when conventions are respected. Class name are upper case but instance objects are lower case. It is not compulsory but just a common use.

fafase · Nov 16, 2012 at 12:28 PM 1

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OOOpsy, it is not the object you are counting but the list....

  var count = PlayerTimerList.Count-1;

" the 1st name of the timer is 0"Yes a list/array or whatever collection in C# and many languages starts at 0. If you want it to start from 1 remove the -1.

fafase · Nov 16, 2012 at 01:59 PM 1

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You can use any value you want for the index as long as it is an integer:

 var num:int = 10;
 list[num] = 20;

I just place 20 in the 11th index (starts from 0).

It also works for data that represent an integer:

 enum Day{$$anonymous$$onday,Tuesday, Wednesday, Thursday, Friday};

 Hours[$$anonymous$$onday] =  8;
 Hours[Tuesday] = 7;

This is because $$anonymous$$onday is equal to 0 and Tuesday to 1 and so on...See about enum.

What about this?:

 var num:int = 10;
 list[num].value = 20;
 list[list[num].value].value = 30;

I put 20 in the 11th index and then placed 30 in the 21th index.

 var currentIndex:int = -1;

 function AddObject(){
    //Creating object
    list.Add(newObject);
    currentIndex++;
 }
 function GetLastObject(){
    return list[currentIndex].variableName;
 }

This way, each time you create a new object, you increase the index. You use that index to retrieve the last one. Now if you need to reach one in particular you would either need to know where it is or use a function that iterates through the list and returns that object but that is another issue. I suggest you look for List on the msdn documentation.

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Answer 3

Answer by FakeBerenger · Nov 16, 2012 at 11:18 AM

You need an index to access an object of that list (PlayerTimerList[2], for instance). Of course, you must fil it with instances of TimerClass first.

About ToString, I'm not sure how it works in uscript, but if the syntaxe is correct it will always returns 'TimerClass'. Override the ToString function, or affect use TimerClass.name

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moonLite · Nov 16, 2012 at 11:35 AM 0

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Hi @FakeBerenger,

Could you give examples of it?

How do I use current List Object [i] as the string name?

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