Getting Unique Random Elements from a List in Unity Game Engine


PrintUniqueRandomElements.cs
?
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
 
public class PrintUniqueRandomElements : MonoBehaviour
{
    List<int> list = new List<int> { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };
 
    List<T> GetUniqueRandomElements<T>(List<T> inputList, int count)
    {
        List<T> inputListClone = new List<T>(inputList);
        Shuffle(inputListClone);
        return inputListClone.GetRange(0, count);
    }
 
    void Shuffle<T>(List<T> inputList)
    {
        for (int i = 0; i < inputList.Count - 1; i++)
        {
            T temp = inputList[i];
            int rand = Random.Range(i, inputList.Count);
            inputList[i] = inputList[rand];
            inputList[rand] = temp;
        }
    }
 
    void Update()
    {
        if(Input.GetMouseButtonDown(0))
        {
            var uniqueRandomList = GetUniqueRandomElements(list, 4);
 
            Debug.Log("All elements => " + string.Join(", ", list));
            Debug.Log("Unique random elements => " + string.Join(", ", uniqueRandomList));
            Debug.Log("*************************************************************");
        }
    }
}
Labels: