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  1. using System;
  2. using System.Collections.Generic;
  3. using System.Linq;
  4.  
  5. public class Test
  6. {
  7.     class Cls {
  8.         public int SequenceNumber { get; set; }
  9.         public int Value { get; set; }
  10.         public Cls(int a, int b) {SequenceNumber=a;Value=b;}
  11.     }
  12.     class Run {
  13.         public int From {get; set;}
  14.         public int To {get; set;}
  15.         public int Value {get;set;}
  16.     }
  17. 	public static void Main()
  18. 	{
  19.         var all = new [] {
  20.             new Cls(1, 9)
  21.         ,   new Cls(2, 9)
  22.         ,   new Cls(3, 15)
  23.         ,   new Cls(4, 15)
  24.         ,   new Cls(5, 15)
  25.         ,   new Cls(6, 30)
  26.         ,   new Cls(7, 9)
  27. 		};
  28.         var f = all.First();
  29.         var res = all.Skip(1).Aggregate(
  30.             new List<Run> {new Run {From = f.SequenceNumber, To = f.SequenceNumber, Value = f.Value} }
  31.         ,   (p, v) => {
  32.             if (v.Value == p.Last().Value) {
  33.                 p.Last().To = v.SequenceNumber;
  34.             } else {
  35.                 p.Add(new Run {From = v.SequenceNumber, To = v.SequenceNumber, Value = v.Value});
  36.             }
  37.             return p;
  38.         });
  39.         foreach (var r in res) {
  40.             Console.WriteLine("{0} - {1} : {2}", r.From, r.To, r.Value);
  41.         }
  42. 	}
  43. }
Success #stdin #stdout 0.04s 34048KB
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stdin
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Standard input is empty
stdout
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1 - 2 : 9
3 - 5 : 15
6 - 6 : 30
7 - 7 : 9
https://ideone.com/NJzZC4
language:
C# (gmcs 5.20.1)
created:
11 years ago
visibility:
public

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