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  1. using static System.Console;
  2. using System.Collections.Generic;
  3.  
  4. public static class Sorteio {
  5.     public static void Main() {
  6.         var lista = new List<string>() { "Alaor", "Joseval", "Salustiano", "Gomide", "Castro" };
  7.         lista.Shuffle();
  8.         foreach (var valor in lista) {
  9.             WriteLine(valor);
  10.         }
  11.         WriteLine("//////////");
  12.         string[] array = { "Alaor", "Joseval", "Salustiano", "Gomide", "Castro" };
  13.         array.Shuffle(2);
  14.         foreach (var valor in array) {
  15.             WriteLine(valor);
  16.         }
  17.         WriteLine("//////////");
  18.         int[] array2 = { 1, 2, 3, 4, 5 };
  19.         array2.Shuffle(1,4);
  20.         foreach (var valor in array2) {
  21.             WriteLine(valor);
  22.         }
  23.     }
  24. }
  25.  
  26. namespace System.Collections.Generic {
  27.     public static class IListExt {
  28.         static Random r = new Random(DateTime.Now.Millisecond);
  29.  
  30.         public static void Shuffle<T>(this IList<T> list, int lowerItem, int upperItem) {
  31.             upperItem = upperItem > list.Count ? list.Count : upperItem;
  32.             lowerItem = lowerItem < 0 ? 0 : lowerItem;
  33.             for (int i = lowerItem; i < upperItem; i++) {
  34.                 int j = r.Next(i, upperItem);
  35.                 T tmp = list[j];
  36.                 list[j] = list[i];
  37.                 list[i] = tmp;
  38.             }
  39.         }
  40.  
  41.         public static void Shuffle<T>(this IList<T> list, int upperItem) {
  42.             list.Shuffle(0, upperItem);
  43.         }
  44.  
  45.         public static void Shuffle<T>(this IList<T> list) {
  46.             list.Shuffle(0, list.Count);
  47.         }
  48.     }
  49. }
  50.  
  51. //https://pt.stackoverflow.com/q/17783/101
Success #stdin #stdout 0.07s 26124KB
comments ()
stdin
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Standard input is empty
stdout
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Gomide
Alaor
Joseval
Castro
Salustiano
//////////
Joseval
Alaor
Salustiano
Gomide
Castro
//////////
1
3
2
4
5
https://ideone.com/VcSOSj
language:
C# (gmcs 5.20.1)
created:
3 years ago
visibility:
public

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