Add Memory and Matrix

34_Digits/csharp/Guesser.cs

@@ -2,21 +2,12 @@ namespace Digits;
 
 internal class Guesser
 {
-    private readonly IReadOnlyList<int> _weights = new List<int> { 0, 1, 3 }.AsReadOnly();
-    private readonly int[][,] _matrices = new[] { new int[3, 3], new int[9, 3], new int[27, 3] };
-    private readonly int[] _indices = new[] { 2, 8, 26 };
+    private readonly Memory _matrices = new();
     private readonly IRandom _random;
 
     public Guesser(IRandom random)
     {
         _random = random;
-
-        for (int j = 0; j < 3; j++)
-        {
-            for (int i = 0; i < 3; i++) { _matrices[0][i, j] = 9; }
-            for (int i = 0; i < 9; i++) { _matrices[1][i, j] = i == 4 * j ? 2 : 3; }
-            for (int i = 0; i < 27; i++) { _matrices[2][i, j] = 1; }
-        }
     }
 
     public int GuessNextDigit()
@@ -24,29 +15,18 @@ internal class Guesser
         var currentSum = 0;
         var guess = 0;
 
-        for (int j = 0; j < 3; j++)
+        for (int i = 0; i < 3; i++)
         {
-            var sum = Enumerable.Range(0, 3).Aggregate((s, i) => s + GetWeightedValue(i, j));
+            var sum = _matrices.GetWeightedSum(i);
             if (sum > currentSum || _random.NextFloat() >= 0.5)
             {
                 currentSum = sum;
-                guess = j;
+                guess = i;
             }
         }
 
         return guess;
     }
 
-    public void ObserveActualDigit(int digit)
-    {
-        for (int i = 0; i < 3; i++)
-        {
-            _matrices[i][_indices[i], digit]++;
-        }
-        _indices[2] = _indices[2] % 9 * 3 + digit;
-        _indices[1] = _indices[2] % 9;
-        _indices[0] = digit;
-    }
-
-    private int GetWeightedValue(int matrix, int row) => _weights[matrix] * _matrices[matrix][_indices[matrix], row];
+    public void ObserveActualDigit(int digit) => _matrices.ObserveDigit(digit);
 }

34_Digits/csharp/Matrix.cs

@@ -0,0 +1,27 @@
+namespace Digits;
+
+internal class Matrix
+{
+    private readonly int _weight;
+    private readonly int[,] _values;
+
+    public Matrix(int width, int weight, Func<int, int, int> seedFactory)
+    {
+        _weight = weight;
+        _values = new int[width, 3];
+        
+        for (int i = 0; i < width; i++)
+        for (int j = 0; j < 3; j++)
+        {
+            _values[i, j] = seedFactory.Invoke(i, j);
+        }
+
+        Index = width - 1;
+    }
+
+    public int Index { get; set; }
+
+    public int GetWeightedValue(int row) => _weight * _values[Index, row];
+
+    public int IncrementValue(int row) => _values[Index, row]++;
+}

34_Digits/csharp/Memory.cs

@@ -0,0 +1,30 @@
+namespace Digits;
+
+public class Memory
+{
+    private readonly Matrix[] _matrices;
+
+    public Memory()
+    {
+        _matrices = new[] 
+        {
+            new Matrix(27, 3, (_, _) => 1),
+            new Matrix(9, 1, (i, j) => i == 4 * j ? 2 : 3),
+            new Matrix(3, 0, (_, _) => 9)
+        };
+    }
+
+    public int GetWeightedSum(int row) => _matrices.Select(m => m.GetWeightedValue(row)).Sum();
+
+    public void ObserveDigit(int digit)
+    {
+        for (int i = 0; i < 3; i++)
+        {
+            _matrices[i].IncrementValue(digit);
+        }
+
+        _matrices[0].Index = _matrices[0].Index % 9 * 3 + digit;
+        _matrices[1].Index = _matrices[0].Index % 9;
+        _matrices[2].Index = digit;
+    }
+}

34_Digits/csharp/Resources/IWin.txt

@@ -1,3 +1,4 @@
+
 I guessed more than 1/3 of your numbers.
 I win.
 

34_Digits/csharp/Resources/ItsATie.txt

@@ -1,3 +1,4 @@
+
 I guessed exactly 1/3 of your numbers.
 It's a tie game.
 

34_Digits/csharp/Resources/YouWin.txt

@@ -1,3 +1,4 @@
+
 I guessed less than 1/3 of your numbers.
 You beat me.  Congratulations *****