update README.md

gztchan · gztchan · commit 76fa9afca487 · 2016-10-23T03:17:32.000+08:00
diff --git a/README.md b/README.md
@@ -29,7 +29,7 @@
 - [x] Chain of Responsibility
 - [x] Command
 - [x] Interpreter
-- [ ] Iterator
+- [x] Iterator
 - [x] Mediator
 - [x] Memento
 - [x] Observer
