fix: invert logic

05/PrintQueue/UpdateValidator.cs

@@ -21,28 +21,30 @@ class UpdateValidator
       Graph[rule.X].Add(rule.Y);
     }
   }
-
+  
+  // NOTE: This is basically a bubble sort
+  // 
   public Update Sort(Update update)
   {
     var sortedUpdate = new Update(update.Pages.ToList());
-
+  
     while (Validate(sortedUpdate) is false)
     {
       for (var i = 0; i < sortedUpdate.Pages.Count - 1; i++)
       {
         var currentPage = sortedUpdate.Pages[i];
         var nextPage = sortedUpdate.Pages[i + 1];
-
+  
-        if (IsOutOfOrder(currentPage, nextPage) is false)
+        if (IsInOrder(currentPage, nextPage))
         {
           continue;
         }
-
+        
         sortedUpdate.Pages[i] = nextPage;
         sortedUpdate.Pages[i + 1] = currentPage;
       }
     }
-
+  
     return sortedUpdate;
   }
   
@@ -52,7 +54,7 @@ class UpdateValidator
     
     foreach (var page in update.Pages)
     {
-      if (previousPages.Any(previousPage => IsOutOfOrder(previousPage, page)))
+      if (previousPages.Any(previousPage => IsInOrder(previousPage, page) is false))
       {
         return false;
       }
@@ -63,9 +65,9 @@ class UpdateValidator
     return true;
   }
 
-  private bool IsOutOfOrder(int previousPage, int futurePage)
+  private bool IsInOrder(int previousPage, int futurePage)
   {
     return Graph.TryGetValue(previousPage, out var dependents) &&
-           dependents.Contains(futurePage) is false;
+           dependents.Contains(futurePage);
   }
 }