Optimized adder

Author: tshemsedinov

JavaScript/b-adder.js

@@ -0,0 +1,14 @@
+'use strict';
+
+const adder = (a) => ({
+  value() {
+    return a;
+  },
+  add(b) {
+    a += b;
+    return this;
+  }
+});
+
+const v = adder(3).add(-9).add(12).value();
+console.log(v);