45 lines
1.1 KiB
C#
45 lines
1.1 KiB
C#
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using System;
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using System.Collections.Generic;
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using System.Security.Cryptography;
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using System.Text;
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namespace BotSharp.Algorithm.Extensions
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{
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public static partial class IListExtensions
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{
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public static void Shuffle2<T>(this IList<T> list)
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{
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var provider = new RNGCryptoServiceProvider();
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int count = list.Count;
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while (count > 1)
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{
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var box = new byte[1];
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do provider.GetBytes(box);
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while (!(box[0] < count * (Byte.MaxValue / count)));
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var k = (box[0] % count);
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count--;
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var value = list[k];
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list[k] = list[count];
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list[count] = value;
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}
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}
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public static void Shuffle<T>(this IList<T> list)
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{
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var rng = new Random();
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var count = list.Count;
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while (count > 1)
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{
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count--;
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var k = rng.Next(count + 1);
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var value = list[k];
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list[k] = list[count];
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list[count] = value;
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}
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}
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}
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}
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