Pretty printing of grids

demo.jl

@@ -1,25 +1,25 @@
 load("solver.jl")
-
 load("sample_games.jl")
+load("viz.jl")
 
 println("Starting Grid")
-println(grid)
+grid_print(grid)
 println()
 
-println("Solution")
-println(solution)
+println("Correct Solution")
+grid_print(solution)
 println()
 
 tentative_solution = solver(grid)
 
 if cost(tentative_solution[3]) == 0
   println("Solution Found by SA")
-  println(tentative_solution[3])
+  grid_print(tentative_solution[3])
   println()
   @assert all(tentative_solution[3] .== solution)
 else
   println("Approximate Solution Found by SA")
-  println(tentative_solution[3])
+  grid_print(tentative_solution[3])
   println()
   println("No exact solution found.")
   println("You should probably the solver run for more than 500,000 iterations.")

viz.jl

@@ -0,0 +1,35 @@
+function safe_print(val)
+  if val == 0
+    print("*")
+  else
+    print(val)
+  end
+end
+
+function grid_print(grid)
+  println()
+  for i = 1:9
+    for j = 1:9
+      if j < 9
+        safe_print(grid[i, j])
+        print(" ")
+      else
+        safe_print(grid[i, j])
+        print("\n")
+      end
+      if j == 3 || j == 6
+        print(" | ")
+      end
+    end
+    if i == 3 || i == 6
+      print("-"^(9 + 8 + 6))
+      print("\n")
+    end
+  end
+  println()
+end
+
+# safe_print(0)
+# safe_print(1)
+# grid_print(grid)
+# grid_print(solution)