I'm trying to do choices based on their weight/probability
this is what I had in python:
import random
myChoiceList = ["Attack", "Heal", "Amplify", "Defense"]
myWeights = [70, 0, 15, 15] // % probability = 100% Ex. Attack has 70% of selection
print(random.choices(myChoicelist , weights = myWeights, k = 1))
I want to do the same thing in c#, how does one do that? does C# have any methods similar to random.choices() all I know is random.Next()
*this python code works fine randome.choice takes in (sequence, weights, k) sequence: values, weights: A list were you can weigh the possibility for each value, k: the length of the returned list,
I'm looking to do the same for C#, choose values based on there probability
There is nothing built into C# like this, however, it's not that hard to add an extension method to recreate the same basic behavior:
static class RandomUtils
{
public static string Choice(this Random rnd, IEnumerable<string> choices, IEnumerable<int> weights)
{
var cumulativeWeight = new List<int>();
int last = 0;
foreach (var cur in weights)
{
last += cur;
cumulativeWeight.Add(last);
}
int choice = rnd.Next(last);
int i = 0;
foreach (var cur in choices)
{
if (choice < cumulativeWeight[i])
{
return cur;
}
i++;
}
return null;
}
}
Then you can call it in a similar way as the Python version:
string[] choices = { "Attack", "Heal", "Amplify", "Defense" };
int[] weights = { 70, 0, 15, 15 };
Random rnd = new Random();
Console.WriteLine(rnd.Choice(choices, weights));
you can get random.next(0,100), then choose the relevant item with a simple switch case or something. your domains will be like this , [0-70 , 70-85, 85-100]. let me know if you need full code.
Random ran = new Random();
int probability = ran.Next(0, 100);
string s;
if (probability == 0)
s = "Heal";
else if (probability <= 70)
s = "Attack";
else if (probability <= 85)
s = "Amplify";
else if (probability <= 100)
s = "Defense";