if one bool in array is true then rest false

Unity Engine
1

Hi,

i want to have only one bool in the array to be true and the rest should be false.
The code works for me, but i have 100+ index numbers. Is there a better way?

public bool[] Btn;
int Index;

public void SendEvent()

{
if (Index== 0)
{
Btn[Index] = true;
}
else
{
Btn[Index] = false;
}

if (Index== 1)
{
Btn[Index] = true;
}
else
{
Btn[Index] = false;
}


}
2

Loop over the array.

for(int i = 0; i < Btn.Length; i++)
{
    if (Index == i)
    {
        Btn[i] = true;
    }
    else
    {
        Btn[i] = false;
    }
}

We can of course simplify that if statement. I only showed it so you can see the logical trajectory to the final solution from your solution.

for(int i = 0; i < Btn.Length; i++)
{
    Btn[i] = (Index == i);
}

When using arrays/collections, the loop should become very familiar with you.

…

I should also point out your original code is going to have a problem in its current state. If Index = 0, then it’s going to set both to false. Since when you get to the second if/else it sets it sets the slot 0 false. I assume you meant to be something like:

if(Index == 1)
{
    Btn[1] = true;
}
else
{
    Btn[1] = false;
}
1 Like