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  1. using System;
  2. using System.Linq;
  3. using System.Collections.Generic;
  4.  
  5. public class Test
  6. {
  7.     static Random rand = new Random();
  8.  
  9.     static void Main(string[] args)
  10.     {
  11.         var products = new List<Product>();
  12.         for (int i = 0; i < 10; i++)
  13.         {
  14.             products.Add(new Product
  15.             {
  16.                 Name = "Product " + (i + 1),
  17.                 StartDetailRating = GenerateRandomVotes()
  18.             });
  19.         }
  20.         var productWithVotes = products.Select(x => new
  21.                               {
  22.                                   Product = x,
  23.                                   VoteAverage = x.StartDetailRating.Any() ? x.StartDetailRating.Average(r => r.VoteValue) : 0
  24.                               });
  25.         foreach (var result in productWithVotes)
  26.         {
  27.             Console.WriteLine("{0} scored an average of {1} votes", result.Product.Name, result.VoteAverage);
  28.         }
  29.     }
  30.  
  31.     static List<StarDetailRating> GenerateRandomVotes()
  32.     {
  33.         var count = rand.Next(50);
  34.         var results = new List<StarDetailRating>(count);
  35.         for (int i = 0; i < count; i++)
  36.         {
  37.             results.Add(new StarDetailRating
  38.             {
  39.                 VoteValue = rand.Next(0, 15)
  40.             });
  41.         }
  42.         return results;
  43.     }
  44. }
  45.  
  46. public class Product
  47. {
  48.     public string Name { get; set; }
  49.     public IEnumerable<StarDetailRating> StartDetailRating { get; set; }
  50. }
  51.  
  52. public class StarDetailRating
  53. {
  54.     public int VoteValue { get; set; }
  55. }
Success #stdin #stdout 0.04s 33808KB
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stdin
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stdout
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Product 1 scored an average of 6.85714285714286 votes
Product 2 scored an average of 8 votes
Product 3 scored an average of 7.3 votes
Product 4 scored an average of 6.82926829268293 votes
Product 5 scored an average of 7.09090909090909 votes
Product 6 scored an average of 7.58823529411765 votes
Product 7 scored an average of 6.62857142857143 votes
Product 8 scored an average of 6.125 votes
Product 9 scored an average of 6.83333333333333 votes
Product 10 scored an average of 6.51282051282051 votes
https://ideone.com/ib16am
language:
C# (gmcs 5.20.1)
created:
11 years ago
visibility:
public

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