Other Example of class to select random option with percentages

Hi, I end using this class I modified for generic types and Unity from https://stackoverflow.com/a/48267598, in case you need something like this

Code (CSharp):

1. public class ProportionalRandomSelector<T> {
2.  
3.         private readonly Dictionary<T, int> percentageItemsDict;
4.  
5.         public ProportionalRandomSelector() => percentageItemsDict = new();
6.  
7.         public void AddPercentageItem(T item, int percentage) => percentageItemsDict.Add(item, percentage);
8.  
9.         public T SelectItem() {
10.          
11.             // Calculate the summa of all portions.
12.             int poolSize = 0;
13.             foreach (int i in percentageItemsDict.Values) {
14.                 poolSize += i;
15.             }
16.  
17.             // Get a random integer from 1 to PoolSize.
18.             int randomNumber = Random.Range(1, poolSize);
19.  
20.             // Detect the item, which corresponds to current random number.
21.             int accumulatedProbability = 0;
22.             foreach (KeyValuePair<T, int> pair in percentageItemsDict) {
23.                 accumulatedProbability += pair.Value;
24.                 if (randomNumber <= accumulatedProbability)
25.                     return pair.Key;
26.             }
27.          
28.             return default;  // this code will never come while you use this programm right :)
29.      
30.         }
31.  
32.     }
33.  
34. //Example of use. You can use any type for the item too, and don't need an internal struct for the use.
35. public class Behaviour : MonoBehaviour {
36.  
37.    ProportionalRandomSelector<string> randomSelector = new();
38.    randomSelector.AddPercentageItem("Option1", 20);
39.    randomSelector.AddPercentageItem("Option2", 30);
40.    randomSelector.AddPercentageItem("Option3", 30);
41.    randomSelector.AddPercentageItem("Option4", 15);
42.    randomSelector.AddPercentageItem("Option5", 5);
43.    string result = randomSelector.SelectItem();
44.  
45. }