Code cleanup

WhiteRabbit/PrecomputedPermutationsGenerator.cs

@@ -5,33 +5,28 @@
 
     internal static class PrecomputedPermutationsGenerator
     {
-        private static PermutationsGenerator.Permutation[] Permutations1 { get; } = PermutationsGenerator.HamiltonianPermutations(1).ToArray();
+        private static PermutationsGenerator.Permutation[][] Permutations { get; } = new[]
-
+        {
-        private static PermutationsGenerator.Permutation[] Permutations2 { get; } = PermutationsGenerator.HamiltonianPermutations(2).ToArray();
+            PermutationsGenerator.HamiltonianPermutations(0).ToArray(),
-
+            PermutationsGenerator.HamiltonianPermutations(1).ToArray(),
-        private static PermutationsGenerator.Permutation[] Permutations3 { get; } = PermutationsGenerator.HamiltonianPermutations(3).ToArray();
+            PermutationsGenerator.HamiltonianPermutations(2).ToArray(),
-
+            PermutationsGenerator.HamiltonianPermutations(3).ToArray(),
-        private static PermutationsGenerator.Permutation[] Permutations4 { get; } = PermutationsGenerator.HamiltonianPermutations(4).ToArray();
+            PermutationsGenerator.HamiltonianPermutations(4).ToArray(),
-
+            PermutationsGenerator.HamiltonianPermutations(5).ToArray(),
-        private static PermutationsGenerator.Permutation[] Permutations5 { get; } = PermutationsGenerator.HamiltonianPermutations(5).ToArray();
+            PermutationsGenerator.HamiltonianPermutations(6).ToArray(),
+            PermutationsGenerator.HamiltonianPermutations(7).ToArray(),
+            PermutationsGenerator.HamiltonianPermutations(8).ToArray(),
+            PermutationsGenerator.HamiltonianPermutations(9).ToArray(),
+        };
 
         public static IEnumerable<PermutationsGenerator.Permutation> HamiltonianPermutations(int n)
         {
-            switch (n)
+            if (n > 9)
             {
-                case 1:
-                    return Permutations1;
-                case 2:
-                    return Permutations2;
-                case 3:
-                    return Permutations3;
-                case 4:
-                    return Permutations4;
-                case 5:
-                    return Permutations5;
-                default:
                 return PermutationsGenerator.HamiltonianPermutations(n);
             }
+
+            return Permutations[n];
         }
     }
 }