Linq101-Set

 using System;
 using System.Collections.Generic;
 using System.Linq;

 namespace Linq101
 {
     class Set
     {
         /// <summary>
         /// This sample uses Distinct to remove duplicate elements in a sequence of factors of 300.
         /// </summary>
         public void Linq46()
         {
             int[] factorsOf300 = { , , , ,  };

             var uniqueFactors = factorsOf300.Distinct();

             Console.WriteLine("300的因数：");
             foreach (var factor in uniqueFactors)
             {
                 Console.WriteLine(factor);
             }
         }

         /// <summary>
         /// This sample uses Distinct to find the unique Category names.
         /// </summary>
         public void Linq47()
         {
             List<Data.Product> products = Data.GetProductList();

             var categoryNames = (from p in products
                                  select p.Category).Distinct();

             Console.WriteLine("种类名称：");
             ObjectDumper.Write(categoryNames);
         }

         /// <summary>
         /// This sample uses Union to create one sequence that contains the unique values from both arrays.
         /// </summary>
         public void Linq48()
         {
             int[] numbersA = { , , , , , ,  };
             int[] numbersB = { , , , ,  };

             var uniqueNumbers = numbersA.Union(numbersB);

             Console.WriteLine("Unique numbers from both arrays:");
             ObjectDumper.Write(uniqueNumbers);
         }

         /// <summary>
         /// This sample uses Union to create one sequence that contains the unique first letter from both product and customer names.
         /// </summary>
         public void Linq49()
         {
             List<Data.Product> products = Data.GetProductList();
             List<Data.Customer> customers = Data.GetCustomerList();

             var productFirstChar = from p in products select p.ProductName[];
             var customerFirstChar = from c in customers select c.CompanyName[];

             var uniqueFirstChar = productFirstChar.Union(customerFirstChar);

             Console.WriteLine("Unique First Char:");
             ObjectDumper.Write(uniqueFirstChar);
         }

         /// <summary>
         /// This sample uses Intersect to create one sequence that contains the common values shared by both arrays.
         /// </summary>
         public void Linq50()
         {
             int[] numbersA = { , , , , , ,  };
             int[] numbersB = { , , , ,  };

             var commonNumbers = numbersA.Intersect(numbersB);

             Console.WriteLine("共有的数字：");
             ObjectDumper.Write(commonNumbers);
         }

         /// <summary>
         /// This sample uses Intersect to create one sequence that contains the common first letter from both product and customer names.
         /// </summary>
         public void Linq51()
         {
             List<Data.Product> products = Data.GetProductList();
             List<Data.Customer> customers = Data.GetCustomerList();

             var productFirstChar = from p in products select p.ProductName[];
             var customerFirstChar = from c in customers select c.CompanyName[];

             var commonFirstChar = productFirstChar.Intersect(customerFirstChar);

             Console.WriteLine("Common First Char");
             ObjectDumper.Write(commonFirstChar);
         }

         /// <summary>
         /// This sample uses Except to create a sequence that contains the values from numbersAthat are not also in numbersB.
         /// </summary>
         public void Linq52()
         {
             int[] numbersA = { , , , , , ,  };
             int[] numbersB = { , , , ,  };

             var aOnlyNumbers = numbersA.Except(numbersB);

             Console.WriteLine("Numbers in arrayA but no ArrayB");
             ObjectDumper.Write(aOnlyNumbers);
         }

         /// <summary>
         /// This sample uses Except to create one sequence that contains the first letters of product names that are not also first letters of customer names.
         /// </summary>
         public void Linq53()
         {
             List<Data.Product> products = Data.GetProductList();
             List<Data.Customer> customers = Data.GetCustomerList();

             var productFirstChar = from p in products select p.ProductName[];
             var customerFirstChar = from c in customers select c.CompanyName[];

             var productOnlyFirstChar = productFirstChar.Except(customerFirstChar);

             Console.WriteLine("First char only in productFirstChar");
             ObjectDumper.Write(productOnlyFirstChar);
         }
     }
 }