Question

对于我的计算机科学入门课程，我必须创建一个应用程序来选择具有各种功能的餐馆，但我无法弄清楚如何随机化数组。以下是我的代码。

string[] myRestaurants = new string[9];

myRestaurants[0] = "Wendy's";
myRestaurants[1] = "Arby's";
myRestaurants[2] = "Olive Garden";
myRestaurants[3] = "The Pie";
myRestaurants[4] = "The Cheesecake Factory";
myRestaurants[5] = "Beto's";
myRestaurants[6] = "Dillinger's Saloon";
myRestaurants[7] = "Dayz Alpher";
myRestaurants[8] = "Firehouse subs";

var nextArray = myRestaurants.ToList();
Random rng = new Random();  
int n = nextArray.Count;
while (n > 1)
{
    n--;
    int k = rng.Next(n + 1);
    T value = nextArray[k];
    nextArray[k] = nextArray[n];
    nextArray[n] = value;
    //bang
}

Answer 1

您可以使用LINQ和OrderBy方法将其随机化..再加上您的Random类：

myRestaurants = myRestaurants
                    .OrderBy(x => myRandom.Next(myRestaurants.Length))
                    .ToArray();

Answer 2

以下示例随机拍摄照片。

Random rand=new Random();
string[] RandomArray = myRestaurants.OrderBy(r => rand.Next()).ToArray();

Answer 3

这是使用Fisher-Yates机制的通用实现：

public static class Extensions
{
    public static void Shuffle<T>(this IList<T> list)
    {
        var rnd = new Random();

        for (int i = list.Count - 1; i >= 0; i--)
        {
            var r = rnd.Next(i + 1);
            T value = list[r];
            list[r] = list[i];
            list[i] = value;
        }
    }
}

用法：

myRestaurants.Shuffle();

示例输出：

The Pie
Dillinger's Saloon
Beto's
橄榄园
芝士蛋糕工厂
Dayz Alpher
Firehouse subs
Arby的
温迪的

随机化一系列餐馆

3 个答案: