mikepack · February 11, 2015 05:02 · Feb 11, 2015
diff --git a/null_object.rb b/null_object.rb
@@ -0,0 +1,32 @@
+class User
+  def name
+    'Mike Pack'
+  end
+end
+
+class GuestUser
+  def name
+    'Guest User'
+  end
+end
+
+class AdminUser
+  def name
+    'Admin User'
+  end
+end
+
+class Controller
+  def current_user
+    return GuestUser.new if rand(0..1) == 0
+    return AdminUser.new if rand(0..5) == 0
+
+    User.new
+  end
+
+  def show
+    puts current_user.name
+  end
+end
+
+Controller.new.show