chapter 03

loiane · loiane · commit 735b32bc320f · 2017-09-17T16:41:46.000-03:00
diff --git a/src/js/data-structures/stack.js b/src/js/data-structures/stack.js
@@ -1,3 +1,5 @@
+// @ts-check
+
 let items;
 export default class Stack {
   constructor() {
