Howdy, currently working on a card minigame, and for some reason im getting an IndexoutofRangeException error.
“IndexOutOfRangeException: Index was outside the bounds of the array.
SceneControllerHard.Start () (at Assets/Scripts/Hard/SceneControllerHard.cs:39)”
What’s confusing is that this is a copy and paste of another script that works perfectly and exists in another scene where you have a harder game difficulty. below i have attached both the working and error variations of the script. The line being called in the error is in bold 
Broken Version:
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.SceneManagement;
public class SceneControllerHard : MonoBehaviour
{
public const int gridRows = 3;
public const int gridCols = 9;
public const float offsetX = 2f;
public const float offsetY = 3.4f;
[SerializeField] private MainCardHard originalCard;
[SerializeField] private Sprite[] images;
private void Start()
{
Vector3 startPos = originalCard.transform.position; //The position of the first card. All other cards are offset from here.
int[] numbers = { 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12, 12 };
numbers = ShuffleArray(numbers);
for (int i = 0; i < gridCols; i++)
{
for (int j = 0; j < gridRows; j++)
{
MainCardHard card;
if (i == 0 && j == 0)
{
card = originalCard;
}
else
{
card = Instantiate(originalCard) as MainCardHard;
}
int index = j * gridCols + i;
int id = numbers[index];
card.ChangeSprite(id, images[id]);
float posX = (offsetX * i) + startPos.x;
float posY = (offsetY * j) + startPos.y;
card.transform.position = new Vector3(posX, posY, startPos.z);
}
}
}
private int[] ShuffleArray(int[] numbers)
{
int[] newArray = numbers.Clone() as int[];
for (int i = 0; i < newArray.Length; i++)
{
int tmp = newArray[i];
int r = Random.Range(i, newArray.Length);
newArray[i] = newArray[r];
newArray[r] = tmp;
}
return newArray;
}
//-------------------------------------------------------------------------------------------------------------------------------------------
private MainCardHard _firstRevealed;
private MainCardHard _secondRevealed;
public bool canReveal
{
get { return _secondRevealed == null; }
}
public void CardRevealed(MainCardHard card)
{
if (_firstRevealed == null)
{
_firstRevealed = card;
}
else
{
_secondRevealed = card;
StartCoroutine(CheckMatch());
}
}
private IEnumerator CheckMatch()
{
if (_firstRevealed.id == _secondRevealed.id)
{
}
else
{
yield return new WaitForSeconds(0.5f);
_firstRevealed.Unreveal();
_secondRevealed.Unreveal();
}
_firstRevealed = null;
_secondRevealed = null;
}
public void Restart()
{
SceneManager.LoadScene("Scene_001");
}
}
Working Version:
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.SceneManagement;
public class SceneControllerNormal : MonoBehaviour
{
public const int gridRows = 2;
public const int gridCols = 9;
public const float offsetX = 2f;
public const float offsetY = 3.4f;
[SerializeField] private MainCardNormal originalCard;
[SerializeField] private Sprite[] images;
private void Start()
{
Vector3 startPos = originalCard.transform.position; //The position of the first card. All other cards are offset from here.
int[] numbers = { 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8 };
numbers = ShuffleArray(numbers);
for (int i = 0; i < gridCols; i++)
{
for (int j = 0; j < gridRows; j++)
{
MainCardNormal card;
if (i == 0 && j == 0)
{
card = originalCard;
}
else
{
card = Instantiate(originalCard) as MainCardNormal;
}
int index = j * gridCols + i;
[B] int id = numbers[index];[/B]
card.ChangeSprite(id, images[id]);
float posX = (offsetX * i) + startPos.x;
float posY = (offsetY * j) + startPos.y;
card.transform.position = new Vector3(posX, posY, startPos.z);
}
}
}
private int[] ShuffleArray(int[] numbers)
{
int[] newArray = numbers.Clone() as int[];
for (int i = 0; i < newArray.Length; i++)
{
int tmp = newArray[i];
int r = Random.Range(i, newArray.Length);
newArray[i] = newArray[r];
newArray[r] = tmp;
}
return newArray;
}
//-------------------------------------------------------------------------------------------------------------------------------------------
private MainCardNormal _firstRevealed;
private MainCardNormal _secondRevealed;
public bool canReveal
{
get { return _secondRevealed == null; }
}
public void CardRevealed(MainCardNormal card)
{
if (_firstRevealed == null)
{
_firstRevealed = card;
}
else
{
_secondRevealed = card;
StartCoroutine(CheckMatch());
}
}
private IEnumerator CheckMatch()
{
if (_firstRevealed.id == _secondRevealed.id)
{
}
else
{
yield return new WaitForSeconds(0.5f);
_firstRevealed.Unreveal();
_secondRevealed.Unreveal();
}
_firstRevealed = null;
_secondRevealed = null;
}
public void Restart()
{
SceneManager.LoadScene("Scene_001");
}
}
This is my first array error, and Im honestly out of my depth on this one. Especially since that portion of code is identical in each file.