Solving Swap Nodes In Pairs in Javascript. Please try yourself first to solve the problem and submit your implementation to LeetCode before looking into solution.

Problem Description

Swap Nodes in Pairs: Given a linked list, swap every two adjacent nodes and return its head.


Given 1->2->3->4, you should return the list as 2->1->4->3.


  • Your algorithm should use only constant extra space.
  • You may not modify the values in the list's nodes, only nodes itself may be changed.

See the full details of the problem Swap Nodes In Pairs at LeetCode

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