¿int number does not repeat with random.range unity? - unity3d

Question

I have 2 numbers that are used with random.range what I need is that the combination of both is not repeated 2 times, that is to say the combination a1, b1 can never be repeated but now I can't get that to happen is for a card game that I have to develop where the same card cannot be repeated neither in the hand nor in the game.
class Meca
public List<carta> cardPlay2; //current card combination, each update resets the list
public List<carta> cartaJugada; // current combination of cards, these are saved so that in future
updates the combination is not repeated
public bool isChange;
if (isChange)
{
cardPlay2.Clear();
int num = 5;
for (int j = 0; j < num; j++)
{
cambioCarta();
}
isChange = false;
}
void cambioCarta()
{
GameObject temp = Instantiate(carta);
temp.transform.SetParent(parent);
GameObject tem2p = Instantiate(carta2);
tem2p.transform.SetParent(parent2);
}
script carta
public int Num_cartas, PaloCarta;
public Mecanic meca;
void Start()
{
meca = GameObject.FindObjectOfType<Mecanic>();
if(gameObject.tag == "carta1")
cartas();
if (gameObject.tag == "carta2")
carta2();
}
void cartas()
{
Num_cartas = UnityEngine.Random.Range(1, 11);
PaloCarta = UnityEngine.Random.Range(1, 5);
carta carta1 = new carta
{
numCarta = Num_cartas,
palo = PaloCarta
};
}
[Serializable]
public class carta
{
public int numCarta;
public int palo;
}
what I'm trying to do is this
private void controlCartaMano2()
{
Num_cartas = UnityEngine.Random.Range(1, 10);
PaloCarta = UnityEngine.Random.Range(1, 4);
for (int i = 0; i < meca.cardPlay2.Count; i++)
{
while (meca.cardPlay2[i].numCarta == Num_cartas && meca.cardPlay2[i].palo == PaloCarta)
{
Num_cartas = UnityEngine.Random.Range(1, 10);
PaloCarta = UnityEngine.Random.Range(1, 4);
}
}
}
private void controlCartaJugada()
{
for (int i = 0; i < meca.cartaJugada.Count; i++)
{
for(int j = 0; j < meca.cartaJugada.Count; j++)
{
if(meca.cartaJugada[i].numCarta == meca.cartaJugada[j].numCarta &&
meca.cartaJugada[i].palo == meca.cartaJugada[j].palo)
{
Num_cartas = UnityEngine.Random.Range(1, 10);
PaloCarta = UnityEngine.Random.Range(1, 4);
}
}
}
}
if you have any idea how to do it I would appreciate it

Answer 1

You can use a Fisher-Yates shuffle method. That will shuffle the array, in place. It's then a simple matter of passing over the array incrementally. Here's a generic method that will shuffle an array:
static void Shuffle<T> ( T [ ] array )
{
var _random = new System.Random ( );
for ( int i = 0, n = array.Length; i < ( n - 1 ); ++i )
{
var next = i + _random.Next ( n - i );
var item = array [ next ];
array [ next ] = array [ i ];
array [ i ] = item;
}
}
For more information, here's the Wiki page : https://en.wikipedia.org/wiki/Fisher%E2%80%93Yates_shuffle