diff --git a/readme.md b/readme.md
index dbac9c7..343b480 100644
--- a/readme.md
+++ b/readme.md
@@ -108,9 +108,7 @@ executions with the the same input parameters.
 Simplest functor in javascript is an `Array`
 
 ```js
-[2,3,4].map( function(n) {
-  return n + 2;
-}); // [4,6,8]
+[2,3,4].map( n => n * 2 ); // [4,6,8]
 ```
 ---