Refactor peek function in Stack.

pltnm239 · May 24, 2018 · 114748b · 114748b
1 parent c8b3fb9
commit 114748b
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/data-structures/stack/Stack.js b/src/data-structures/stack/Stack.js
@@ -16,7 +16,7 @@ export default class Stack {
    * @return {*}
    */
   peek() {
-    if (!this.linkedList.tail) {
+    if (this.isEmpty()) {
       return null;
     }