Python – linked list Question: Why is it only printing 6 and 7? I need to print all the values. I believe there is some issue with get() as self.head is being updated somewhere? If so, how can I declare self.head here as the beginning so that it prints all the elements. Thanks in advance. …
Perform arithmetic on a singly linked list which represent a large number Question: I have a linked list which represents the large number 2253239487. class ListNode: def __init__(self, val, next=None): self.val = val self.next = next def __repr__(self): return ‘{0}’.format(self.val) The ListNode instance is populated as below: h1 = ListNode(2) n2 = ListNode(2) n3 = …
Time complexity regarding linked_list ( Recursion ) Question: let us say I have a recursive call for linked list: ( Singular ) def append(self, val): def append_rec(node, val): if node.next is None: node.next = Node(val) else: append_rec(node.next, val) if self.head is None: self.head = Node(val) self.len += 1 else: append_rec(self.head, val) self.len += 1 what …
Return Statement from a method/function Question: I feel a little bit silly asking this, but I’m practicing some DSA. I’m watching a Youtube video, and I find odd that in some methods of the class the return method is left without returning a value. I know that it’ll return None but I don’t understand how …
(Python) Help decoding what is happening here Question: This code is not mine, I am just trying to understand it! I need some help understanding what is happening in this lst2link function. So the function starts off by creating two ListNodes in the variables cur and dummy and the then proceeds to build the linked …
What is wrong in my code… Split A circular linked list Question: Question https://practice.geeksforgeeks.org/problems/split-a-circular-linked-list-into-two-halves/1 Given a Cirular Linked List of size N, split it into two halves circular lists. If there are odd number of nodes in the given circular linked list then out of the resulting two halved lists, first list should have one …
AttributeError: 'list' object has no attribute 'val' in linked list LeetCode challenge Question: I am trying to solve a LeetCode problem concerning linked lists Merge Two Sorted Lists, but when I test my solution locally, and pass example lists [1,2,3] to my function, I get this error: AttributeError: ‘list’ object has no attribute ‘val’ What …
Inserting and getting the position in a Linked List class using python Question: I am new to Data Structure and algorithms. I’m a self-taught Python programmer. I am doing a course on it and I wanted to make a linked list, get a specific position in the linked list, insert, and delete an element in …
When does a pointer to a linked list change the actual list? Question: I have a singly-linked-list, L, and create a pointer to this list P. It seems like sometimes modifying P changes the actual list, while other times modifying P does nothing to the actual list L and only changes what P is pointing …
Explanation about dummy nodes and pointers in linked lists Question: I have the following class for a list node: def __init__(self, x): self.val = x self.next = None If I initialize the lists l and r as follows: l = ListNode(1) l.next = ListNode(4) l.next.next = ListNode(5) r = ListNode(1) r.next = ListNode(3) r.next.next = …
