Update js/without_this.md

Author: GrosSacASac

js/without_this.md

@@ -5,4 +5,6 @@ It is possible to write Object oriented and functional JavaScript entirely witho
 
 Every function can return an object
 
-Every function can take an instance as first argument explicitly
+Every function can take an instance as first argument explicitly
+
+Every function can compose or combine results of other functions