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how to sort a linked list javascript

Wrong Wolverine answered on January 2, 2023 Popularity 6/10 Helpfulness 2/10

answer how to sort a linked list javascript

how to sort a linked list javascript

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Here is an example of how you can sort a linked list using the merge sort algorithm:

function ListNode(val) {
  this.val = val;
  this.next = null;
}

function mergeSortList(head) {
  if (!head || !head.next) {
    return head;
  }

  let fast = head;
  let slow = head;
  let prev = null;

  while (fast && fast.next) {
    prev = slow;
    slow = slow.next;
    fast = fast.next.next;
  }

  prev.next = null;

  const l1 = mergeSortList(head);
  const l2 = mergeSortList(slow);

  return merge(l1, l2);
}

function merge(l1, l2) {
  const dummy = new ListNode();
  let curr = dummy;

  while (l1 && l2) {
    if (l1.val < l2.val) {
      curr.next = l1;
      l1 = l1.next;
    } else {
      curr.next = l2;
      l2 = l2.next;
    }
    curr = curr.next;
  }

  curr.next = l1 || l2;
  return dummy.next;
}

const head = new ListNode(4);
head.next = new ListNode(2);
head.next.next = new ListNode(1);
head.next.next.next = new ListNode(3);

const sortedHead = mergeSortList(head);

let current = sortedHead;
while (current) {
  console.log(current.val);
  current = current.next;
}

Popularity 6/10 Helpfulness 2/10 Language javascript

Source: Grepper

Tags: javascript linked-list

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Contributed on Jan 02 2023

Wrong Wolverine

0 Answers Avg Quality 2/10

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sort linked list javascript

Comment

here is a basic outline:

* Split the list into two halves
* Recursively sort each half
* Merge the two sorted halves into a single, sorted list

You can use other sorting algorithms like quicksort or bubble sort. If you need help with implementation or want a more detailed example, just let me know!

Popularity 1/10 Helpfulness 1/10 Language javascript

Source: Grepper

Tags: linked-list javascript

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Contributed on Mar 30 2024

Gavin Dennett

0 Answers Avg Quality 2/10

how to sort a linked list javascript

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sort linked list javascript

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