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Add comments to Linked List code.

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This commit is contained in:
Oleksii Trekhleb 2018-07-30 15:35:28 +03:00
parent 5105898aa7
commit 97926b1243
1 changed files with 4 additions and 0 deletions
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4
src/data-structures/linked-list/LinkedList.js
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@ -128,6 +128,7 @@ 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;
@ -135,6 +136,9 @@ export default class LinkedList {
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) {