Categorize and tag all patterns #213

2015-12-28 15:52:44 +02:00
parent fefb51c46e
commit 7ac7e3b097
55 changed files with 147 additions and 48 deletions
--- a/null-object/index.md
+++ b/null-object/index.md
@ -4,7 +4,9 @@ title: Null Object
 folder: null-object
 permalink: /patterns/null-object/
 categories: Behavioral
-tags: Java
+tags:
+ - Java
+ - Difficulty-Beginner
 ---

 **Intent:** In most object-oriented languages, such as Java or C#, references