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  1. using System;
  2. using System.IO;
  3. using System.Linq;
  4. using System.Threading;
  5. using System.Threading.Tasks;
  6. using System.Diagnostics;
  7. using System.Collections.Generic;
  8.  
  9. namespace NetTest
  10. {
  11.  
  12.     class Test
  13.     {
  14.         class Item {
  15.             public int Id { get; set; }
  16.             public string Name { get; set; }
  17. 			public override string ToString() {
  18.                 return $"Id={Id} Name={Name}";
  19. 			}
  20. 		}
  21.         static void Main(string[] args) {
  22.             var schedules = new List<Item>{
  23.                 new Item { Id=1, Name = "S" },
  24.                 new Item { Id=2, Name = "P" },
  25.                 new Item { Id=3, Name = "X" },
  26.                 new Item { Id=4, Name = "X" },
  27.                 new Item { Id=5, Name = "P" },
  28.                 new Item { Id=6, Name = "P" },
  29.                 new Item { Id=7, Name = "P" },
  30.                 new Item { Id=8, Name = "S" }
  31.             };
  32.             IDictionary<string,int> count = new Dictionary<string,int>();
  33.             var groups = schedules
  34.                 .Select((s, i) => new {
  35.                     Item = s
  36.                 ,   Index = i
  37.                 })
  38.                 .GroupBy(p => {
  39.                     var name = p.Item.Name;
  40.                     int current;
  41.                     if (!count.TryGetValue(name, out current)) {
  42.                         current = 0;
  43.                         count.Add(name, current);
  44.                     }
  45.                     count[name] = current + 1;
  46.                     return new { Name = name, Order = current - p.Index };
  47.                 })
  48.                 .Select(g => g.ToList())
  49.                 .Where(g => g.Count > 1)
  50.                 .ToList();
  51.             foreach (var g in groups) {
  52.                 Console.WriteLine("-----");
  53.                 foreach (var s in g) {
  54.                     Console.WriteLine(s);
  55.                 }
  56.             }
  57.         }
  58.  
  59.     }
  60.  
  61. }
  62.  
Success #stdin #stdout 0.04s 16508KB
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stdin
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Standard input is empty
stdout
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-----
{ Item = Id=3 Name=X, Index = 2 }
{ Item = Id=4 Name=X, Index = 3 }
-----
{ Item = Id=5 Name=P, Index = 4 }
{ Item = Id=6 Name=P, Index = 5 }
{ Item = Id=7 Name=P, Index = 6 }
https://ideone.com/Bhn2kG
language:
C# (gmcs 5.20.1)
created:
7 years ago
visibility:
public

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