Problem when changing a value in the list

Questions & Answers
1

Hi Guys,

I’m having a problem with my list and what happen is that when I change a single value on the list, all the values int the list changes.

Down Below is my code to setup my list.

void PreLoadBattleData()
{
    //Preparing the needed List
    List<int> tempList = new List<int>(2);
    // 0 - 111 SquareNumber
    for (int i = 0; i < 112; i++)
    {
        tempList.Add(0); //Add 0 for occupant
        tempList.Add(mapData*); //Add terrain data*

battleData.Add(tempList); //Then integrate it to BattleData
}
}
Then after running some functions I will arrive with this method.
void DeployUnit()
{
int unitSelected = battleManager.GetComponent().popUpPage;
battleManager.GetComponent().battleData[int.Parse(gameObject.transform.parent.name)][0] = (unitSelected + 1);
}
The last line should only change a single value in the list.
In example battleData[50][0] the value from 0 will be changed to 1 but when I print them on the console.
All battleData[(from 0-111)][0] will print the value of 1 even though I only changed 1 part of it.
Please help, this seems basic but I could not find out where did I go wrong.
I’ve tried debugging all the codes that will leave up to that method but only that method can change the values in my List.

2

Able to fixed it on my own.
I use the same code when I change variables from a different script and figured that that script can’t be incorrect.
So I experimented with how I build the list.
Below is what fixed the issue;

void PreLoadBattleData()
{
    for(int i = 0; i < 112; i++)
    {
        List<int> tempList = new List<int>(2);
        for (int x = 0; x < 2; x++)
        {
            tempList.Add(0);
        }
        battleData.Add(tempList);
    }
    
    for(int i = 0; i < 112; i++)
    {
        battleData_[1] = mapData*;*_

}
}
Although I am not sure how I am able to fix it because I don’t see any difference aside from making the code more complicated.
So I would appreciate it if someone can point it out for me.