update: infor added

Author: ashokdey

src/_DataStructures_/Stack/2-stacks-using1-array/index.js

@@ -1,3 +1,10 @@
+/**
+ * So what special in this implementation?
+ * This deals with Dynamic array without a size hence the implemetation uses
+ * lot of space and I can sense that it can be further improved hence feel free
+ * to open PR
+ */
+
 class TwoStacks {
   constructor() {
     this.data = [];