Fix lint issue.

Author: trekhleb

src/data-structures/linked-list/LinkedList.js

@@ -56,11 +56,11 @@ export default class LinkedList {
 
  /**
  * @param {*} value
- * @param {*} index
+ * @param {number} index
  * @return {LinkedList}
  */
- insert(value, index) {
- index = index < 0 ? 0 : index;
+ insert(value, rawIndex) {
+ const index = rawIndex < 0 ? 0 : rawIndex;
  if (index === 0) {
  this.prepend(value);
  } else {
@@ -70,7 +70,7 @@ export default class LinkedList {
  while (currentNode) {
  if (count === index) break;
  currentNode = currentNode.next;
- count++;
+ count += 1;
  }
  if (currentNode) {
  newNode.next = currentNode.next;

src/data-structures/linked-list/__test__/LinkedList.test.js

@@ -45,7 +45,7 @@ describe('LinkedList', () => {
  linkedList.insert(10, 9);
 
  expect(linkedList.toString()).toBe('1,4,2,3,10');
- })
+ });
 
  it('should delete node by value from linked list', () => {
  const linkedList = new LinkedList();