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  1. Prepare
  2. Data Structures
  3. Linked Lists
  4. Insert a node at the head of a linked list
  5. Discussions

Insert a node at the head of a linked list

  • srikanth_shenoy1
     + 0 comments

    Here's a Python 3 code with O(1) time Complexity (Correct me if I'm wrong):

    def insertNodeAtHead(llist, data):
    newNode = SinglyLinkedListNode(data)
    if llist is None:
        llist = newNode
        return llist
    else:
        newNode.next = llist
        llist = newNode
    return llist