reverse a linked list javascript
// O(n) time & O(n) space
function reverse(head) {
if (!head || !head.next) {
return head;
}
let tmp = reverse(head.next);
head.next.next = head;
head.next = undefined;
return tmp;
}reverse a linked list javascript
// O(n) time & O(n) space
function reverse(head) {
if (!head || !head.next) {
return head;
}
let tmp = reverse(head.next);
head.next.next = head;
head.next = undefined;
return tmp;
}reverse linklist in javascript
// reverse a linked list
var reverseLinkedList = function(linkedlist) {
var node = linkedlist;
var previous = null;
while(node) {
// save next or you lose it!!!
var save = node.next;
// reverse pointer
node.next = previous;
// increment previous to current node
previous = node;
// increment node to next node or null at end of list
node = save;
}
return previous; // Change the list head !!!
}
linkedlist = reverseLinkedList(linkedlist);Copyright © 2021 Codeinu
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