fork download
copy 
  1. using System;
  2. using System.Collections.Generic;
  3. using System.Linq;
  4.  
  5. class Test
  6. {
  7.     private static void Main()
  8.     {
  9.         List<List<FilteredVM>> groupedExpressionResults = GetDataSample();
  10.  
  11.         IEnumerable<int> ids = groupedExpressionResults.Aggregate((x, y) => x.Where(xi => y.Select(yi => yi.ID).Contains(xi.ID)).ToList()).Select(x => x.ID);
  12.  
  13.         // ids : { 3, 7 };
  14.         foreach (var i in ids)
  15.         {
  16.             Console.WriteLine(i);
  17.         }
  18.     }
  19.  
  20.     private static List<List<FilteredVM>> GetDataSample()
  21.     {
  22.         var lst1 = new List<FilteredVM>
  23.         {
  24.             new FilteredVM {ID = 2},
  25.             new FilteredVM {ID = 3},
  26.             new FilteredVM {ID = 7},
  27.             new FilteredVM {ID = 9},
  28.         };
  29.         var lst2 = new List<FilteredVM>
  30.         {
  31.             new FilteredVM {ID = 3},
  32.             new FilteredVM {ID = 6},
  33.             new FilteredVM {ID = 7},
  34.         };
  35.         var lst3 = new List<FilteredVM>
  36.         {
  37.             new FilteredVM {ID = 3},
  38.             new FilteredVM {ID = 5},
  39.             new FilteredVM {ID = 7},
  40.             new FilteredVM {ID = 8},
  41.         };
  42.  
  43.         return new List<List<FilteredVM>> { lst1, lst2, lst3 };
  44.     }
  45. }
  46.  
  47. public class FilteredVM
  48. {
  49.     public int ID { get; set; }
  50.     public string Name { get; set; }
  51.     public string Number { get; set; }
  52. }
  53.  
Success #stdin #stdout 0.05s 24424KB
comments ()
stdin
copy 
Standard input is empty
stdout
copy 
3
7
https://ideone.com/PvXlaE
language:
C# (gmcs 5.20.1)
created:
9 years ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!