Add comments to Linked List code.

trekhleb · trekhleb · commit 97926b124317 · 2018-07-30T15:35:28.000+03:00
diff --git a/src/data-structures/linked-list/LinkedList.js b/src/data-structures/linked-list/LinkedList.js
@@ -128,13 +128,17 @@ export default class LinkedList {
    */
   deleteTail() {
     const deletedTail = this.tail;
+
     if (this.head === this.tail) {
       // There is only one node in linked list.
       this.head = null;
       this.tail = null;
 
       return deletedTail;
     }
+
+    // If there are many nodes in linked list...
+
     // Rewind to the last node and delete "next" link for the node before the last one.
     let currentNode = this.head;
     while (currentNode.next) {
