Extract `IntArrayEqualityComparer` to new `AdventOfCode.HelperClasses` project and refactor solution to use the shared class

AdventOfCode.HelperClasses/AdventOfCode.HelperClasses.csproj

@@ -0,0 +1,9 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+    <PropertyGroup>
+        <TargetFramework>net9.0</TargetFramework>
+        <ImplicitUsings>enable</ImplicitUsings>
+        <Nullable>enable</Nullable>
+    </PropertyGroup>
+
+</Project>

AdventOfCode.HelperClasses/IntArrayEqualityComparer.cs

@@ -0,0 +1,24 @@
+namespace AdventOfCode.HelperClasses;
+
+public class IntArrayEqualityComparer : IEqualityComparer<int[]>
+{
+    public bool Equals(int[]? x, int[]? y)
+    {
+        if (x is null || y is null || x.Length != y.Length) return false;
+
+        return !x.Where((t, i) => t != y[i]).Any();
+    }
+
+    public int GetHashCode(int[] obj)
+    {
+        var result = 17;
+        foreach (var t in obj)
+        {
+            unchecked
+            {
+                result = result * 23 + t;
+            }
+        }
+        return result;
+    }
+}

AdventOfCode.sln

@@ -12,6 +12,8 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "AdvenOfCode.Contracts", "Ad
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "AdventOfCode.Extensions", "AdventOfCode.Extensions\AdventOfCode.Extensions.csproj", "{1466A0F6-7C88-47FF-B8F8-FF30368E26DC}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "AdventOfCode.HelperClasses", "AdventOfCode.HelperClasses\AdventOfCode.HelperClasses.csproj", "{D47175BB-5AD6-43A8-9287-FF5E6F1816E3}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -38,6 +40,10 @@ Global
 		{1466A0F6-7C88-47FF-B8F8-FF30368E26DC}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{1466A0F6-7C88-47FF-B8F8-FF30368E26DC}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{1466A0F6-7C88-47FF-B8F8-FF30368E26DC}.Release|Any CPU.Build.0 = Release|Any CPU
+		{D47175BB-5AD6-43A8-9287-FF5E6F1816E3}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{D47175BB-5AD6-43A8-9287-FF5E6F1816E3}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{D47175BB-5AD6-43A8-9287-FF5E6F1816E3}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{D47175BB-5AD6-43A8-9287-FF5E6F1816E3}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(NestedProjects) = preSolution
 		{4F395AE3-DABB-4546-A4D0-5A62425FE168} = {05EBAA1C-B33B-4AFE-8635-A58D7CA509A7}

AoC_2025/AoC_2025.csproj

@@ -9,6 +9,7 @@
     <ItemGroup>
       <ProjectReference Include="..\AdvenOfCode.Contracts\AdvenOfCode.Contracts.csproj" />
       <ProjectReference Include="..\AdventOfCode.Extensions\AdventOfCode.Extensions.csproj" />
+      <ProjectReference Include="..\AdventOfCode.HelperClasses\AdventOfCode.HelperClasses.csproj" />
     </ItemGroup>
 
     <ItemGroup>

AoC_2025/Day10.cs

@@ -7,13 +7,14 @@ using System.IO;
 using System.Linq;
 using AdvenOfCode.Contracts;
 using AdventOfCode.Extensions;
+using AdventOfCode.HelperClasses;
 using Microsoft.Z3;
 
 namespace AoC_2025;
 
 public class Day10 : IPuzzleSolver<long>
 {
-    private (uint lamps, uint[] buttons, int[] joltages)[] ParsePuzzleInput(string path)
+    private (uint lamps, uint[] buttons)[] ParsePuzzleInput(string path)
     {
         var puzzleInput = File.ReadAllLines(path)
             .Where(line => !string.IsNullOrWhiteSpace(line))
@@ -41,16 +42,8 @@ public class Day10 : IPuzzleSolver<long>
                 .Select(lampIndexes => lampIndexes.Aggregate((uint)0L, (acc, lampIndex) => acc | ((uint)1 << lampIndex)))
                 .ToArray())
             .ToArray();
-        var joltages = puzzleInput
-            .Select(input => input.joltages)
-            .Select(joltage => joltage
-                .Split(',', StringSplitOptions.RemoveEmptyEntries)
-                .Select(jolt => int.Parse(jolt))
-                .ToArray())
-            .ToArray();
         var res = lamps
             .Zip(buttons, (lamp, button) => (lamp, button))
-            .Zip(joltages, (bl, joltage) => (bl.lamp, bl.button, joltage))
             .ToArray();
         return res;
     }
@@ -273,26 +266,3 @@ public class Day10 : IPuzzleSolver<long>
         return answer;
     }
 }
-
-public class IntArrayEqualityComparer : IEqualityComparer<int[]>
-{
-    public bool Equals(int[]? x, int[]? y)
-    {
-        if (x is null || y is null || x.Length != y.Length) return false;
-
-        return !x.Where((t, i) => t != y[i]).Any();
-    }
-
-    public int GetHashCode(int[] obj)
-    {
-        var result = 17;
-        foreach (var t in obj)
-        {
-            unchecked
-            {
-                result = result * 23 + t;
-            }
-        }
-        return result;
-    }
-}