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Question by sysmaya · Aug 03, 2016 at 01:12 PM · arraysinitializedeclare

Error Initialize array two dimensions C#

First Class:

 using UnityEngine;
 using System.Collections;
 
 public class Slot : MonoBehaviour {
     public string State= "VACIO";
     public string Player;
 }

Second Class:

 using UnityEngine;
     using System.Collections;
     
     public class ControlGame : MonoBehaviour {
         public Slot[,] gridSlot = null; 
     
         void Start () {
             gridSlot = new Slot[3,3];
             gridSlot [0, 0].State = "FULL";
             gridSlot [0, 0].Player= "TOWER";
         }
     }

Compilig error: NullReferenceException: Object reference not set to an instance of an object ControlGame.Start () (at Assets/scripts/ControlGame.cs:8)

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avatar image sysmaya · Aug 03, 2016 at 10:29 AM 0
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$$anonymous$$e Answer 1 hour later ...

 using UnityEngine;
      using System.Collections;
      
      public class ControlGame : $$anonymous$$onoBehaviour {
          public Slot[,] gridSlot = null; 
      
          void Start () {
              gridSlot = new Slot[3,3];
              gridSlot [1, 1] = new Slot ();  /* Initialize AGAIN */
              gridSlot [0, 0].State = "FULL";
              gridSlot [0, 0].Player= "TOWER";
          }
      }
avatar image Owen-Reynolds · Aug 03, 2016 at 01:36 PM 0
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This is how standard NEWing really works -- where you wrote "Initialize Again" isn't really initializing again. It's doing the rest of the work. You can read about this in just regular places that explain C# (or Java) arrays and classes and NEW.

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