diff --git a/desktop/sources/scripts/library.js b/desktop/sources/scripts/library.js
index 8edb2c8..0fdfacc 100644
--- a/desktop/sources/scripts/library.js
+++ b/desktop/sources/scripts/library.js
@@ -221,6 +221,10 @@ function Library (ronin) {
     return arg
   }
 
+  this.str = (...args) => {
+    return args.reduce((acc, val) => { return acc + val }, '')
+  }
+
   this.test = (name, a, b) => {
     if (Array.isArray(a)) {
       // TODO: make testing more solid
diff --git a/examples/benchmark.lisp b/examples/benchmark.lisp
index 75f3d77..478e06c 100644
--- a/examples/benchmark.lisp
+++ b/examples/benchmark.lisp
@@ -44,4 +44,8 @@
   (def addOne (lambda (a) (add a 1)))
   (test "def - value" aaa 123)
   (test "def - func" (addOne 4) 5)
+
+; Generics
+
+  (test "str" (str 1 4 "-" (add 3 4) ".jpg") "14-7.jpg")
 )
\ No newline at end of file