diff --git a/README.md b/README.md
index 11369a3..75c84d3 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,8 @@
 # C-tips-tricks-and-idioms
 C++ tips tricks and idioms
+
+~~~
+private constructor
+singleton pattern
+swap trick
+~~~