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  1. using System;
  2. using System.Collections;
  3. using System.Collections.Generic;
  4. using System.Text;
  5.  
  6.     class Program
  7.     {
  8.         static void Main(string[] args)
  9.         {
  10.             //Test with classes
  11.             string[] classesList1 = new[] {"a", "b", "c"};
  12.             string[] classesList2 = new[] { "1", "2", "3" };
  13.             List<string[]> classesListCombined = new List<string[]> { classesList1, classesList2 };
  14.  
  15.             Console.WriteLine("classesList1: {0}", classesList1.Join());
  16.             Console.WriteLine("classesListCombined: {0}", classesList1.Join());
  17.  
  18.             //Test with structs
  19.             int[] structList1 = new[] { 1, 2, 3 };
  20.             int[] structList2 = new[] { 4, 5, 6 };
  21.             List<int[]> structListCombined = new List<int[]> { structList1, structList2 };
  22.  
  23.  
  24.             Console.WriteLine("structList1: {0}", structList1.Join());
  25.             Console.WriteLine("structListCombined: {0}", structListCombined.Join());
  26.  
  27.             //Test tripple nesting
  28.  
  29.             var nest1 = new[] {1, 2, 3};
  30.             var nest2 = new[] { 4, 5, 6 };
  31.             var nest3 = new[] { 7, 8, 9 };
  32.             var nest4 = new[] {10, 11, 12};
  33.  
  34.             var layer1 = new[] {nest1, nest2};
  35.             var layer2 = new[] {nest3, nest4};
  36.             var top = new[] {layer1, layer2};
  37.  
  38.  
  39.             Console.WriteLine("top: {0}", top.Join());
  40.  
  41.             Console.ReadLine();
  42.  
  43.         }
  44.     }
  45.  
  46.     internal static class ExtensionMethods
  47.     {
  48.         public static String Join<T>(this IEnumerable<T> enumerable)
  49.         {
  50.             StringBuilder sb = new StringBuilder();
  51.             JoinInternal(enumerable, sb, true);
  52.             return sb.ToString();
  53.         }
  54.  
  55.         private static bool JoinInternal(IEnumerable enumerable, StringBuilder sb, bool first)
  56.         {
  57.             foreach (var item in enumerable)
  58.             {
  59.                 var castItem = item as IEnumerable;
  60.                 if (castItem != null)
  61.                 {
  62.                     first = JoinInternal(castItem, sb, first);
  63.                 }
  64.                 else
  65.                 {
  66.                     if (!first)
  67.                     {
  68.                         sb.Append(",");
  69.                     }
  70.                     else
  71.                     {
  72.                         first = false;
  73.                     }
  74.  
  75.                     sb.Append(item);
  76.                 }
  77.             }
  78.             return first;
  79.         }
  80.     }
Success #stdin #stdout 0.05s 24344KB
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stdin
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Standard input is empty
stdout
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classesList1: a,b,c
classesListCombined: a,b,c
structList1: 1,2,3
structListCombined: 1,2,3,4,5,6
top: 1,2,3,4,5,6,7,8,9,10,11,12
https://ideone.com/mgr8xQ
language:
C# (gmcs 5.20.1)
created:
10 years ago
visibility:
public

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