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  1. using System;
  2. using System.Collections;
  3. using System.Collections.Generic;
  4.  
  5.     class Program
  6.     {
  7.         static void Main(string[] args)
  8.         {
  9.             //Test with classes
  10.             string[] classesList1 = new[] {"a", "b", "c"};
  11.             string[] classesList2 = new[] { "1", "2", "3" };
  12.             List<string[]> classesListCombined = new List<string[]> { classesList1, classesList2 };
  13.  
  14.             Console.WriteLine("classesList1: {0}", String.Join(",", classesList1.SelectManyRecusive<string>()));
  15.             Console.WriteLine("classesListCombined: {0}", String.Join(",", classesListCombined.SelectManyRecusive<string>()));
  16.  
  17.             //Test with structs
  18.             int[] structList1 = new[] { 1, 2, 3 };
  19.             int[] structList2 = new[] { 4, 5, 6 };
  20.             List<int[]> structListCombined = new List<int[]> { structList1, structList2 };
  21.  
  22.  
  23.             Console.WriteLine("structList1: {0}", String.Join(",", structList1.SelectManyRecusive<int>()));
  24.             Console.WriteLine("structListCombined: {0}", String.Join(",", structListCombined.SelectManyRecusive<int>()));
  25.  
  26.             //Test tripple nesting
  27.  
  28.             var nest1 = new[] {1, 2, 3};
  29.             var nest2 = new[] { 4, 5, 6 };
  30.             var nest3 = new[] { 7, 8, 9 };
  31.             var nest4 = new[] {10, 11, 12};
  32.  
  33.             var layer1 = new[] {nest1, nest2};
  34.             var layer2 = new[] {nest3, nest4};
  35.             var top = new[] {layer1, layer2};
  36.  
  37.  
  38.             Console.WriteLine("top: {0}", String.Join(",", top.SelectManyRecusive<int>()));
  39.  
  40.             Console.ReadLine();
  41.  
  42.         }
  43.     }
  44.  
  45.     internal static class ExtensionMethods
  46.     {
  47.         public static IEnumerable<T> SelectManyRecusive<T>(this IEnumerable enumerable)
  48.         {
  49.             foreach (var item in enumerable)
  50.             {
  51.                 var castEnumerable = item as IEnumerable;
  52.                 if (castEnumerable != null 
  53.                     && ((typeof(T) != typeof(string)) || !(castEnumerable is string))) //Don't split string to char if string is our target
  54.                 {
  55.                     foreach (var inner in SelectManyRecusive<T>(castEnumerable))
  56.                     {
  57.                         yield return inner;
  58.                     }
  59.                 }
  60.                 else
  61.                 {
  62.                     if (item is T)
  63.                     {
  64.                         yield return (T) item;
  65.                     }
  66.                 }
  67.             }
  68.         }
  69.     }
Success #stdin #stdout 0.05s 24384KB
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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,1,2,3
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/Jn0j6g
language:
C# (gmcs 5.20.1)
created:
10 years ago
visibility:
public

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