From 46766de185b550762cc9e62ab09edc3797306520 Mon Sep 17 00:00:00 2001
From: "jason.zhu" <jason.zhu@xero.com>
Date: Thu, 25 Feb 2021 13:31:24 +1100
Subject: [PATCH] Customer Filter Operator w/o deferred execution

---
 Queries/Movie.cs                 | 17 +++++++++++++++--
 Queries/{MyLInq.cs => MyLinq.cs} |  2 +-
 Queries/Program.cs               |  4 ++++
 linq-fundamentals.sln            | 14 ++++++++++++++
 4 files changed, 34 insertions(+), 3 deletions(-)
 rename Queries/{MyLInq.cs => MyLinq.cs} (95%)

diff --git a/Queries/Movie.cs b/Queries/Movie.cs
index 4fa2432..0728ef3 100644
--- a/Queries/Movie.cs
+++ b/Queries/Movie.cs
@@ -1,9 +1,22 @@
-namespace Queries
+using System;
+
+namespace Queries
 {
     public class Movie
     {
         public string Title { get; set; }
         public float Rating { get; set; }
-        public int Year { get; set; }
+        private int _year;
+        public int Year {
+            get
+            {
+                Console.WriteLine($"Returning {_year} for {Title}");
+                return _year;
+            }
+            set
+            {
+                _year = value;
+            }
+        }
     }
 }
\ No newline at end of file
diff --git a/Queries/MyLInq.cs b/Queries/MyLinq.cs
similarity index 95%
rename from Queries/MyLInq.cs
rename to Queries/MyLinq.cs
index e6b8b32..efb2118 100644
--- a/Queries/MyLInq.cs
+++ b/Queries/MyLinq.cs
@@ -5,7 +5,7 @@ using System.Reflection;
 
 namespace Queries
 {
-    public static class MyLInq
+    public static class MyLinq
     {
         public static IEnumerable<T> Filter<T>(this IEnumerable<T> source, 
             Func<T, bool> predicate)
diff --git a/Queries/Program.cs b/Queries/Program.cs
index 9dea817..2f603bb 100644
--- a/Queries/Program.cs
+++ b/Queries/Program.cs
@@ -17,6 +17,8 @@ namespace Queries
             };
 
             // filter operator from LINQ
+            Console.WriteLine();
+            Console.WriteLine("Filter operator from LINQ");
             var query = movies.Where(m => m.Year > 2000);
             foreach (var movie in query)
             {
@@ -24,6 +26,8 @@ namespace Queries
             }
             
             // filter operator using customized Filter extension
+            Console.WriteLine();
+            Console.WriteLine("Customerized Filter operator");
             var query2 = movies.Filter(m => m.Year > 2000);
             foreach (var movie in query2)
             {
diff --git a/linq-fundamentals.sln b/linq-fundamentals.sln
index f718702..a6585a6 100644
--- a/linq-fundamentals.sln
+++ b/linq-fundamentals.sln
@@ -9,6 +9,8 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Features", "Features\Featur
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Queries", "Queries\Queries.csproj", "{FB21B6B5-70C3-444E-A1D1-2CCD3F575DD9}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "yield_test", "yield_test\yield_test.csproj", "{790E4D64-D90A-4289-9F5D-35B6A2BDBE5B}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -58,5 +60,17 @@ Global
 		{FB21B6B5-70C3-444E-A1D1-2CCD3F575DD9}.Release|x64.Build.0 = Release|Any CPU
 		{FB21B6B5-70C3-444E-A1D1-2CCD3F575DD9}.Release|x86.ActiveCfg = Release|Any CPU
 		{FB21B6B5-70C3-444E-A1D1-2CCD3F575DD9}.Release|x86.Build.0 = Release|Any CPU
+		{790E4D64-D90A-4289-9F5D-35B6A2BDBE5B}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{790E4D64-D90A-4289-9F5D-35B6A2BDBE5B}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{790E4D64-D90A-4289-9F5D-35B6A2BDBE5B}.Debug|x64.ActiveCfg = Debug|Any CPU
+		{790E4D64-D90A-4289-9F5D-35B6A2BDBE5B}.Debug|x64.Build.0 = Debug|Any CPU
+		{790E4D64-D90A-4289-9F5D-35B6A2BDBE5B}.Debug|x86.ActiveCfg = Debug|Any CPU
+		{790E4D64-D90A-4289-9F5D-35B6A2BDBE5B}.Debug|x86.Build.0 = Debug|Any CPU
+		{790E4D64-D90A-4289-9F5D-35B6A2BDBE5B}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{790E4D64-D90A-4289-9F5D-35B6A2BDBE5B}.Release|Any CPU.Build.0 = Release|Any CPU
+		{790E4D64-D90A-4289-9F5D-35B6A2BDBE5B}.Release|x64.ActiveCfg = Release|Any CPU
+		{790E4D64-D90A-4289-9F5D-35B6A2BDBE5B}.Release|x64.Build.0 = Release|Any CPU
+		{790E4D64-D90A-4289-9F5D-35B6A2BDBE5B}.Release|x86.ActiveCfg = Release|Any CPU
+		{790E4D64-D90A-4289-9F5D-35B6A2BDBE5B}.Release|x86.Build.0 = Release|Any CPU
 	EndGlobalSection
 EndGlobal